Additive dispensing device and washing machine

Abstract

An additive dispensing device (100) and a washing machine. The additive dispensing device (100) comprises: a water supply path (1) for allowing inflow water entering the additive dispensing device (100) to flow through; and a dispensing unit, used for dispensing an additive to the water supply path (1), wherein a plurality of Venturi tubes (19) arranged in parallel are arranged on the water supply path (1), a negative pressure suction port (191) of each Venturi tube (19) is communicated with the external atmosphere, and negative pressure is formed at the negative pressure suction port (191) under the action of an additive mixed liquid flowing through each Venturi tube (19), external air enters the Venturi tube (19) through the negative pressure suction port (191) and is mixed with the additive mixed liquid flowing through the Venturi tube (19) to excite the additive mixed liquid to generate foam to form a foam-containing mixture. By arranging the plurality of Venturi tubes (19) arranged in parallel on the water supply path (1), the flowing additive liquid is excited by the suctioned air, thereby increasing the foaming amount of the additive mixture dispensed outward, and improving the laundry washing effect.

Description

Additive dispensing device and washing machine Technical Field

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

[0002] Existing washing machines generally have a water drum for holding washing water, a rotatable washing drum is arranged in the water drum, and a dehydration hole is provided on the washing drum to connect the inside and the outside, so that the washing water flowing into the water drum can flow alternately inside and outside the washing drum through the dehydration hole, so as to achieve the effect of contacting the washing water with the load to be processed placed in the washing drum and using the washing water to process the load.

[0003] The aforementioned conventional washing machine additive dosing method involves injecting additives into a pipe connected to the washing machine's water drum via an additive dosing device. The additives then flow along the pipe into the washing machine's water drum. Consequently, the additives dispensed using this conventional method remain within the washing machine's water drum, outside the washing drum, and are unable to directly contact the load placed within the drum.

[0004] Then, when the washing machine performs a wash cycle, the added additive mixes with the wash water flowing into the water drum. Some of the wash water mixed with the additive flows through the dewatering hole into the washing drum and comes into contact with the load to be treated in the drum. Only then can a small portion of the additive mixed in the wash water come into contact with the load and take effect on the load. Therefore, the traditional method of adding additives has the problem of low efficiency of the added additives and waste of additives.

[0005] Furthermore, in conventional additive delivery methods, to ensure that the additives delivered between the water storage drum and the washing drum come into contact with the load being processed in the washing drum, a large amount of water must be flowed into the water storage drum until the water level in the water storage drum is higher than that in the washing drum. This ensures that the washing water flows into the washing drum through the dewatering holes and that the additives come into contact with the load in the washing drum. Therefore, conventional additive delivery methods still suffer from the problem of excessive water consumption.

[0006] In order to solve the above problems, the applicant previously proposed a technical solution of directly adding an additive mixture into the drum of a washing machine, allowing the additive mixture to act directly on the clothes in the drum, and using the washing machine to efficiently wash the clothes soaked in the mixture and having a high additive concentration.

[0007] However, the above solution has the problem that the mixing effect of the additive and the incoming water in the dosing device is poor, and the uniformity of the mixed liquid dosed into the drum is very low. In addition, since the additive and water are directly mixed in the water channel 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 proposed.

[0009] Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an additive delivery device to achieve the purpose of directly delivering additives through the water supply channel; at the same time, the present invention also provides an additive delivery device to achieve foaming stimulation of the additives and water in the water supply channel, so that the additives and water form a mixed liquid containing foaming particles, and the additive mixed liquid containing foaming particles is delivered to the washing machine for use, thereby improving the treatment effect of the added additives on clothes.

[0011] In order to achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the present invention is:

[0012] The present invention provides an additive dosing device, which includes: a water supply waterway for water to flow through; a dosing unit for adding additives to the water supply waterway to mix with the water supply water flow to form an additive mixed liquid; at least one venturi tube is 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, external air enters from the negative pressure suction port and mixes with the additive mixed liquid, stimulating it to generate foam.

[0013] Furthermore, the water supply channel is provided with two or more Venturi tubes arranged in parallel.

[0014] Furthermore, a mounting portion protruding radially 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 the two ends of the pipe are respectively connected to the upstream part and the downstream part of the water supply channel.

[0015] Furthermore, a ventilation cavity is provided on the lower side of the mounting portion, and the ventilation cavity is connected to the outside atmosphere through a ventilation channel; the negative pressure suction port of each venturi tube is opened downward, and a notch is provided on the mounting portion to connect the negative pressure suction port and the ventilation cavity, so that each venturi tube is connected to the same ventilation cavity.

[0016] Furthermore, the additive delivery device includes a water box, and the water supply channel is integrated in the upper cover of the water box; the upper cover is composed of an upper cover body and a lower cover body that are buckled together, and the two cover bodies are provided with matching concave and convex structures on the opposite surfaces, 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 installation portion located inside the water supply channel, and each Venturi tube is plugged and installed on the same installation portion, connecting the water supply channel portions on both sides of the installation portion; the lower cover body is provided with a downwardly concave, open-top groove structure, and the installation portion is correspondingly buckled with the upper open part of the groove structure, so that the groove structure constitutes a ventilation cavity.

[0017] Furthermore, a plurality of branch channels arranged horizontally at intervals are provided in the block-shaped mounting portion, and the two ends of each branch channel are respectively connected to the 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 and downstream parts 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 located directly below the negative pressure suction port of each venturi tube to connect the interior of the venturi tube pipeline with the ventilation cavity; two circles of sealing rings are provided on the outer tube wall of the venturi tube, and the two circles of sealing rings are respectively located on the upstream and downstream sides of the notch, for sealing the gap between the venturi tube and the branch channel; preferably, a semi-annular opening is provided on the tube wall of the venturi tube, which is opened downward and arranged half a circle around the tube wall, and the semi-annular opening is located directly above the strip notch, and the width of the semi-annular opening is smaller than the width of the strip notch.

[0018] Furthermore, the branch channel is a straight pipe section whose axis extends in the horizontal direction; the venturi tube includes a liquid inlet pipe section and a liquid outlet pipe section that are coaxially connected with unequal diameters; the liquid inlet pipe section with a small diameter is coaxially inserted in the branch channel, 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 circumference of the pipe wall of the liquid inlet pipe section is equal to the radial dimension of the inner circumference of the 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 portion facing the downstream part of the water supply waterway.

[0019] Furthermore, one end of the branch channel connected to the upstream part of the water supply waterway is provided with a circle of annular ribs protruding radially inward, and the inner radial dimension of the annular ribs is smaller than the radial dimension of the outer peripheral wall of the liquid inlet pipe section of the Venturi tube.

[0020] Furthermore, a mounting protrusion extending outward is provided on the outer tube wall of the liquid outlet pipe section, and a mounting column protruding upward is provided on the lower cover body. The mounting protrusion is correspondingly placed on the top of the mounting column, and the screw passes through the mounting protrusion from top to bottom and is threadedly engaged with the mounting column for installation.

[0021] Furthermore, the bottom wall and top wall of the water supply channel on the upstream side of the Venturi tube are both inclined surfaces that gradually rise along the direction of liquid flow, the two inclined surfaces are parallel, and the distance between them is greater than the radial dimension of the outer tube wall of the Venturi tube; the bottom wall and top wall of the water supply channel on the downstream side of the Venturi tube are both flat surfaces, the two planes are parallel, and the distance between them is greater than the radial dimension of the outer tube wall of the Venturi tube; the spacing between the two inclined surfaces is smaller than the spacing between the two planes.

[0022] Furthermore, the bottom wall plane of the water supply channel on the downstream side of the Venturi tube is flush with the lowest point of the bottom wall slope of the water supply channel on the upstream side of the Venturi tube; the top wall plane of the water supply channel on the downstream side of the Venturi tube is flush with the highest point of the top wall slope of the water supply channel on the upstream side of the Venturi tube.

[0023] Furthermore, the Venturi tube is divided into three pipe sections that are connected in sequence and coaxially arranged from the liquid inlet end to the liquid outlet end, namely a necking pipe section, a straight pipe section and an expanding pipe section; the necking pipe section is a conical pipe section with a gradually narrowing aperture along the direction of liquid flow; 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 necking pipe section, or greater than or equal to the maximum pipe diameter of the expanding pipe section; the expanding pipe section is a conical pipe section with a gradually widening aperture along the direction of liquid flow; a semicircular 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 semicircular opening constitutes a negative pressure suction port; preferably, the negative pressure suction port covers at least one-third of the height of the lower part of the pipe wall of the straight pipe section.

[0024] Furthermore, a mixing structure is provided in the upstream portion of the water supply channel upstream of the venturi tube, and the connection point between the dosing unit and the water supply channel is located upstream of the mixing structure. The mixing structure mixes the dosed additives with the water supply to form an additive mixture.

[0025] Another object of the present invention is to provide a washing machine equipped with the above-mentioned additive delivery device to achieve the purpose of directly delivering additives into the washing drum, thereby achieving direct contact between the delivered detergent and the load to be processed in the washing drum, thereby improving the utilization rate of the detergent.

[0026] In order to achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the present invention is:

[0027] The present invention also discloses a washing machine, which includes a washing drum for holding a load to be processed, and an additive dispensing device as described above, wherein the inlet of a water supply circuit of the additive dispensing device is connected to a water inlet pipe of the washing machine, and the outlet of the water supply circuit is connected to a liquid outlet structure, and the liquid outlet structure sprays toward the washing drum of the washing machine.

[0028] Furthermore, the liquid outlet structure is arranged on the shell, and / or door body, and / or water drum, and / or window pad of the washing machine, and the spray outlet of the liquid outlet structure is opened toward the inside of the washing drum, and the additive solution foaming mixture sprayed by the liquid outlet structure is directly sprayed into the washing drum.

[0029] In addition, the technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an additive dosing device to achieve the purpose of directly dosing additives outward through the water supply waterway; at the same time, the present invention also provides an additive dosing device and an additive dosing method to achieve the mixing of additives in the water supply waterway with water and external air to stimulate foaming, so that the additives and water form a mixed liquid containing foaming particles, and the additive mixed liquid containing foaming particles is put into the washing machine for use, thereby improving the treatment effect of the added additives on clothes.

[0030] In order to achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the present invention is:

[0031] The present invention provides an additive dosing device, which includes: a water supply waterway for water to flow through; a flushing waterway, which is connected to a temporary storage chamber and is used for flushing water to flow through; a dosing unit, which is used to dosing additives into the flushing waterway and / or the temporary storage chamber, and the flushing water flow and the dosed additives enter the temporary storage chamber together and mix to form an additive mixed liquid; a negative pressure pipe is provided on the water supply waterway, and a negative pressure suction port of the negative pressure pipe is respectively connected to the external atmosphere and the temporary storage chamber; when the supply water flows through the negative pressure pipe, negative pressure is generated at the negative pressure suction port, and the negative pressure is used to simultaneously draw the external air and the additive mixed liquid in the temporary storage chamber into the water supply waterway from the negative pressure suction port, thereby stimulating the generation of foam.

[0032] Furthermore, the negative pressure pipe includes a Venturi tube, the liquid inlet and liquid outlet of the Venturi tube are connected to the water supply waterway, so that the water supply flows through the Venturi tube; the Venturi tube includes a contracting pipe, a negative pressure straight pipe and an expanding pipe that are sequentially connected from the liquid inlet end to the liquid outlet end; a negative pressure suction port is provided on the pipe wall of the negative pressure pipe to connect the inside and outside of the pipe; the negative pressure suction port is connected to the temporary storage chamber through the delivery pipe, and is used to extract the additive mixture in the temporary storage chamber; an air inlet is provided in the middle of the delivery pipe, and the air inlet is connected to the outside atmosphere through the suction pipe, and is used to inhale external air.

[0033] Furthermore, a one-way check structure is provided on the intake pipe and / or at the connection point between the intake pipe and the delivery pipe to prevent the additive mixture flowing through the delivery pipe from being discharged out of the intake pipe; preferably, the air inlet connecting the intake pipe and the delivery pipe is a small hole with a pore size smaller than the particles of the additive mixture; further preferably, the air inlet is a small hole with a pore size smaller than 5 mm, preferably a small hole approximately equal to 1 mm.

[0034] Furthermore, a one-way ventilation valve is provided on the air intake pipeline to ensure that only airflow from the outside to the delivery pipeline can flow through the air intake pipeline.

[0035] Furthermore, the delivery pipeline includes a horizontal pipe section and a vertical pipe section. One end of the horizontal pipe section is connected to the negative pressure suction port opened on one side of the pipe wall of the horizontally extending Venturi tube, and the other end is connected to the upper end of the vertical pipe section. The lower end of the vertical pipe section is connected to the bottom of the temporary storage chamber, and an air inlet is arranged in the middle of the horizontal pipe section; a maximum liquid level height of the additive mixture is set in the temporary storage chamber, and the temporary storage chamber space above the maximum liquid level height is a ventilation part; the ventilation part is respectively connected to the air inlets arranged on the suction pipeline and the delivery pipeline, and is used to connect the air inlet arranged on the delivery pipeline with the suction pipeline through the ventilation part of the temporary storage chamber.

[0036] Furthermore, a ventilation liquid inlet chamber is provided on one side of the temporary storage chamber, and the ventilation liquid inlet chamber is connected to the ventilation part of the temporary storage chamber; the bottom wall of the ventilation liquid inlet chamber is higher than the maximum liquid level height in the temporary storage chamber, and the top of the ventilation liquid inlet chamber is arranged flush with the top of the temporary storage chamber; the suction pipeline and the flushing water channel are both connected to the ventilation liquid inlet chamber, and the air inlet arranged on the delivery pipeline is connected to the top of the ventilation liquid inlet chamber.

[0037] Furthermore, the two opposite sides of the ventilation liquid inlet chamber are respectively a first side and a second side, the first side is connected to the temporary storage chamber, and the second side is connected to the suction pipe and the flushing water channel, and the bottom wall of the ventilation liquid inlet chamber is gradually inclined downward from the first side to the second side; the suction pipe and the flushing water channel are respectively arranged at the opposite ends of the first side of the ventilation liquid inlet chamber, and the inlets of the suction pipe and the flushing water channel are arranged perpendicularly to each other.

[0038] Furthermore, the air inlet is located directly above the ventilation part connecting the ventilation and liquid inlet chamber to the temporary storage chamber, and is used to connect the lowest point in the middle of the delivery pipeline and the ventilation and liquid inlet chamber with the ventilation and liquid inlet chamber at the top of the temporary storage chamber, so that the air inlet of the delivery pipeline is connected to the ventilation part at the top of the temporary storage chamber, the ventilation and liquid inlet chamber and the suction pipeline, and is used to draw air from the outside atmosphere into the delivery pipeline.

[0039] Furthermore, the dosing unit includes a dosing pipeline, a liquid storage chamber and a dosing pump; the two ends of the dosing pipeline are respectively connected to the liquid storage chamber and the flushing water channel, and a dosing pump is provided on the dosing pipeline, which is used to generate a driving force when the dosing pump is working and extract the additive in the liquid storage chamber into the flushing water channel; preferably, a one-way valve is provided on the dosing pipeline to guide the dosing pipeline in one direction, which is used to control the additive to flow only from the liquid storage chamber to the flushing water channel.

[0040] The present invention also provides an additive dispensing method of the additive dispensing device, which comprises:

[0041] The additive in the liquid storage chamber is added to the flushing water channel;

[0042] Flushing water flows into the flushing water channel, and the flushing water flushes the added additives into the temporary storage chamber to form an additive mixed liquid;

[0043] Water flows into the water supply channel. When the water flows through the negative pressure pipe, negative pressure is generated at the negative pressure suction port of the negative pressure pipe. The negative pressure draws the additive mixture in the temporary storage chamber and the outside air into the water supply channel.

[0044] When the additive mixture and the outside air flow into the water supply channel together, they mix and form foam, and the additive mixture containing foam is discharged outward along with the water supply flow.

[0045] Furthermore, the total amount of the additive mixture formed in the temporary storage chamber is less than the amount corresponding to the maximum liquid level of the temporary storage chamber. The maximum liquid level of the temporary storage chamber is lower than the point where the negative pressure suction port of the negative pressure tube is connected to the outside air, so as to ensure that the additive mixture in the temporary storage chamber will not flow out through the air inlet.

[0046] Furthermore, any of the above-mentioned additive delivery devices adopts the above-mentioned delivery method to deliver the additive.

[0047] Another object of the present invention is to provide a washing machine equipped with the above-mentioned additive delivery device to achieve the purpose of directly delivering additives into the washing drum, thereby achieving direct contact between the delivered detergent and the load to be processed in the washing drum, thereby improving the utilization rate of the detergent.

[0048] In order to achieve the above-mentioned purpose, the basic concept of the technical solution adopted by the present invention is:

[0049] The present invention also discloses a washing machine, which includes a washing drum for holding a load to be processed, and also includes any of the above-mentioned additive delivery devices, the inlet of the water supply circuit and the inlet of the flushing circuit of the additive delivery device are respectively connected to the water inlet pipe of the washing machine, and the outlet of the water supply circuit is connected to the liquid outlet structure, the liquid outlet structure is provided on the shell, and / or door body, and / or water drum, and / or window pad of the washing machine, and the liquid outlet structure sprays a foamy mixture formed by the additive and water supply into the washing drum of the washing machine.

[0050] Furthermore, the liquid outlet structure is arranged on the shell, and / or door body, and / or water drum, and / or window pad of the washing machine, and the spray outlet of the liquid outlet structure is opened toward the inside of the washing drum, and the additive solution foaming mixture sprayed by the liquid outlet structure is directly sprayed into the washing drum.

[0051] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0052] 1. The present invention utilizes the aforementioned device to allow additives to be dispensed directly through the water channel provided on the dispensing device, eliminating the need for additives to flow through the water box. This not only shortens the additive's flow path but also reduces the amount of flushing water required for additive dispensing, significantly improving additive utilization. Furthermore, the additive solution flowing from the water channel is directly sprayed through the liquid outlet structure, increasing the coverage area of ​​the sprayed additive solution and enabling it to be sprayed directly onto the load to be treated deep within the washing tub.

[0053] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0054] 1. The present invention utilizes the aforementioned device to allow additives to be dispensed directly through the water channel provided on the dispensing device, eliminating the need for additives to flow through the water box. This not only shortens the additive's flow path but also reduces the amount of flushing water required for additive dispensing, significantly improving additive utilization. Furthermore, the additive solution flowing from the water channel is directly sprayed through the liquid outlet structure, increasing the coverage area of ​​the sprayed additive solution and enabling it to be sprayed directly onto the load to be treated deep within the washing tub.

[0055] 2. At the same time, the present invention provides the above-mentioned additive dispensing device on the washing machine, so that the additives of the washing machine flow directly to the liquid outlet structure through the water supply channel and are directly sprayed into the washing tub from the liquid outlet structure. In this way, the additives of the washing machine do not pass through the water box or the water storage drum outside the washing tub, but directly flow into the washing tub through the water channel of the dispensing device and are 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.

[0056] 3. Furthermore, by installing a Venturi tube in the water supply channel, air is introduced into the water supply channel as it flows through, causing air particles to be mixed into the water flowing through the water supply channel. This allows the incoming water containing air particles to stimulate the foaming of the added additives, resulting in an additive mixture containing foaming particles with better washing performance. This significantly improves the activity of the additives and enhances the washing effect of the added additive mixture on clothing. In particular, the installation of multiple Venturi tubes arranged in parallel in the water supply channel ensures that all of the additive solution flowing through is stimulated by the pumped air, thereby significantly improving the amount of foaming of the additive mixture released by the dispensing device.

[0057] 4. In addition, the present invention provides the above-mentioned additive dispensing device on the washing machine, so that the additives of the washing machine flow directly to the liquid outlet structure through the water supply channel and are directly sprayed into the washing tub from the liquid outlet structure. Thus, the additives of the washing machine do not pass through the water box or the water storage drum outside the washing tub, but directly flow into the washing tub through the water channel of the dispensing device and are 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.

[0058] 5. Furthermore, by providing a negative pressure pipe in the water supply circuit, the water flowing through the circuit simultaneously extracts the additive mixture and outside air from the temporary storage chamber, allowing air particles to be mixed into the additive mixture. This achieves the purpose of utilizing the air particles to stimulate the foaming of the additive mixture, thereby achieving a better washing effect of the additive mixture containing foaming particles, thereby achieving a significant technological advancement in enhancing the activity of the additives and the washing effect of the added additive mixture on clothes. In particular, outside air is injected into the additive mixture in the temporary storage chamber through the negative pressure suction port of the negative pressure pipe, so that all additive solution extracted into the water supply circuit is stimulated by the pumped air, thereby significantly improving the amount of foaming of the additive mixture released by the dispensing device.

[0059] At the same time, the present invention has a simple structure, significant effects, and is suitable for popularization and use.

[0060] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0062] FIG1 is a schematic structural diagram of a washing machine according to an embodiment of the present invention;

[0063] FIG2 is a schematic cross-sectional view of a washing machine according to an embodiment of the present invention;

[0064] FIG3 is a schematic diagram of the three-dimensional structure of the additive delivery device according to an embodiment of the present invention;

[0065] FIG4 is a schematic top view of the structure of the additive delivery device according to an embodiment of the present invention;

[0066] FIG5 is a schematic diagram of the AA cross-sectional structure of FIG4 according to an embodiment of the present invention;

[0067] FIG6 is an enlarged schematic diagram of the structure at the oval dotted line in FIG5 according to an embodiment of the present invention;

[0068] FIG7 is a schematic diagram of the three-dimensional structure of the additive dispensing device according to an embodiment of the present invention with the upper cover plate removed;

[0069] FIG8 is a schematic diagram of the principle of an additive delivery device according to another embodiment of the present invention;

[0070] FIG9 is a schematic diagram of the three-dimensional structure of an additive delivery device according to another embodiment of the present invention;

[0071] 10 is a schematic top view of the structure of an additive delivery device according to another embodiment of the present invention;

[0072] FIG11 is a schematic diagram of the AA cross-sectional structure of FIG10 according to an embodiment of the present invention;

[0073] FIG12 is a schematic diagram of the BB cross-sectional structure of FIG11 according to an embodiment of the present invention;

[0074] FIG13 is a schematic diagram of the CC cross-sectional structure of FIG11 in an embodiment of the present invention.

[0075] Description of the main components in the figure:

[0076] 100, dispensing device; 200, water container; 300, washing tub; 400, window gasket; 500, liquid outlet structure; 600, conduit; 700, mixing structure; 1, water supply channel; 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, necking Pipeline; 197, straight pipeline; 198, flared pipeline; 199, mounting convex; 110, mounting portion; 111, branch channel; 112, notch; 113, annular rib; 114, vertical matching rib; 120, ventilation cavity; 121, ventilation channel; 122, vertical rib; 130, mounting column; 131, screw; 8, upstream part; 9, downstream part; 81, inclined plane; 91, plane; 4, flushing waterway; 5, temporary storage chamber; 6, negative pressure pipe; 7, delivery unit; 71, delivery channel; 8, liquid storage chamber; 9, delivery pump; 10, suction pipeline; 11, delivery pipeline; 111, horizontal pipe section; 112, vertical pipe section; 12, air inlet; 13, first switch valve; 14, second switch valve; 015, ventilation and liquid inlet cavity.

[0077] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0078] In order to make the purpose, 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 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.

[0079] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0080] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0081] As shown in Figures 1 and 2, embodiments of the present invention also introduce a washing machine, which includes: a water drum 200 for holding water, a rotatable washing drum 300 mounted within the water drum 200 for holding a load to be processed, and an additive dispensing device 100 for directly dispensing additives into the washing drum 300. This arrangement enables the washing machine to dispense additives directly into the washing drum 300, with the dispensed additives being directly sprayed onto the load to be processed within the washing drum 300, thereby achieving a significant technological advancement in increasing the utilization rate of additives.

[0082] As shown in FIG1 to FIG7 , the additive delivery device 100 according to the embodiment of the present invention includes:

[0083] A water supply channel 1 for supplying water to the additive dosing device 100;

[0084] A dosing unit, used for adding additives to the water supply channel 1;

[0085] The outlet of the water supply channel 1 is connected to the liquid outlet structure 500, which is positioned toward the washing drum 300 of the washing machine. When adding additives, a small amount of water flows into the water supply channel, mixing with the small amount of water in the water supply channel 1 to form an additive solution. The additive solution supplied by the water supply channel 1 can be sprayed directly onto the load to be treated in the washing drum 300 through the liquid outlet structure 500, thereby significantly improving the utilization rate of the added additives.

[0086] Through the above device, the additives are directly discharged outward through the water channel set on the dispensing device 100, avoiding the additives flowing through the water box. This not only shortens the flow path of the additives, but also reduces the amount of flushing water required for the additives to be dispensed, greatly improving the utilization rate of the additives.

[0087] As shown in Figures 1 to 7, in an embodiment of the present invention, a water supply circuit 1 is integrated with the water box 2 of the additive dosing device 100. The outlet of the water supply circuit 1 is located outside the water box 2, and a liquid outlet structure 500 is located outside the water box 2. The outlet of the water supply circuit 1 is connected to the liquid outlet structure 500 via a conduit 600. By integrating the water supply circuit 1 with the water box 2 of the additive dosing device 100, the outlet of the water supply circuit 1 is directly connected to the liquid outlet structure 500, so that the additives drawn through the water supply circuit 1 and the incoming water are sprayed out together, thereby achieving the purpose of the additive dosing device 100 spraying directly from the liquid outlet structure 500 without passing through the water box portion of the dosing device 100. Preferably, the liquid outlet structure 500 can be any nozzle structure described in the prior art, having a spray outlet opening into the rotating drum of the washing machine for spraying the mixed liquid into the rotating drum of the washing machine.

[0088] As shown in Figures 1 to 7, in an embodiment of the present invention, a plurality of venturi tubes 19 are arranged in parallel on the water supply channel 1. The negative pressure suction port 191 of each venturi tube 19 is connected to the external atmosphere. The additive mixture flowing through each venturi tube 19 creates a negative pressure at the negative pressure suction port 191. This causes the external air to enter the venturi tube 19 from the negative pressure suction port 191 and mix with the additive mixture flowing through the venturi tube 19, thereby stimulating the generation of foam to form a foam-containing mixture. Consequently, the foam-containing additive mixture is sprayed directly onto the load to be processed in the washing tub 300 through the liquid outlet structure 500. The load is then sprayed and washed using the foamed additive mixture, achieving a washing effect with less water intake and higher washing efficiency. At the same time, by setting up multiple parallel venturi tubes 19, each venturi tube 19 can allow part of the additive mixture to flow through, so that multiple venturi tubes 19 can be used 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 advancement.

[0089] In this embodiment of the present invention, a mounting portion 110 is provided within the water supply channel 1, radially protruding from the inner wall of the channel. Mounting portion 110 divides the water supply channel 1 into an upstream portion 8 and a downstream portion 9. Each venturi tube 19 is mounted on mounting portion 110, with its ends communicating with the upstream portion 8 and downstream portion 9 of the water supply channel, respectively. Consequently, the water supply channel 1 is partitioned by mounting portion 110, forcing the additive mixture in the upstream portion 8 of the water supply channel 1 to flow through a venturi tube 19 before hopping over mounting portion 110 to flow to the downstream portion. This ensures that the entire additive mixture is available for extraction and mixing with air to generate foam, significantly improving the foaming efficiency of the additive mixture.

[0090] In the embodiment of the present invention, a ventilation cavity 120 is provided on the lower side of the mounting portion 110, and the ventilation cavity 120 is connected to the outside atmosphere through a ventilation channel 121. The ventilation channel 121 can be directly connected to the opening provided on the outer wall of the shell of the dispensing device 100 to achieve the effect of being connected to the outside atmosphere; the ventilation channel 121 can also be connected to the internal chamber of the shell of the dispensing device, and be connected to the outside atmosphere through the opening at the front end of the chamber; naturally, the ventilation channel 121 can also be connected to the drum of the washing machine, and be connected to the outside atmosphere through the ventilation port provided on the drum, and other settings are possible.

[0091] At the same time, in the embodiment of the present invention, the negative pressure suction port 191 of each venturi tube 19 is opened downward, and the mounting portion 110 is provided with a notch 112 that connects the negative pressure suction port 191 with the ventilation cavity 120, so that each venturi tube 19 is connected with the same ventilation cavity 120, thereby achieving the technical effect that the venturi tubes 19 are connected to the atmosphere and air can be drawn in to foam the additive mixture flowing through.

[0092] In an embodiment of the present invention, the additive dispensing device includes a water box 2, with an upper cover 3 fastened to the top of the water box 2; the water supply channel 1 is integrated into the upper cover 3; the upper cover 3 is composed of an upper cover body 31 and a lower cover body 32 fastened together, and the two cover bodies are provided with a matching concave-convex structure on the opposite surfaces. The above-mentioned concave-convex structure forms a gap channel between the fastening contact surfaces of the two cover bodies, and the above-mentioned gap channel constitutes the water supply channel 1; preferably, the upper cover body and the lower cover body are connected by a welding process to fix the upper cover body and the lower cover body, and the relative concave-convex structures are welded together to form a whole, so that the water supply channel integrated in the upper cover will not leak and the upper and lower covers can be fixed and assembled as a whole. At the same time, the upper cover body 31 is provided with a downwardly protruding mounting portion 110 composed of a block structure located in the water supply channel 1, and each venturi tube 19 has its axis extending horizontally and is correspondingly plugged and installed on the mounting portion 110. The lower cover 32 is provided with a groove-like structure that is concave downward and open on the upper side. 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 channel 1.

[0093] Preferably, in order to ensure the positioning accuracy when the upper and lower covers are snapped together, two vertical ribs 122 are provided on the bottom wall of the lower cover 32, which protrude upward and are arranged at intervals along the direction of liquid flow in the water supply channel 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 direction of liquid flow in the water supply channel 1; the two vertical ribs 122 and the two vertical matching ribs 114 are arranged in a one-to-one correspondence, and the lower end of the vertical rib 122 abuts against the upper end of the vertical matching rib 114 and is connected as one through a welding process, so that the vertical rib 122 and the vertical matching rib 114 are connected as one at the junction, thereby preventing the liquid in the water supply channel 1 from entering the ventilation cavity 120 from the junction of the upper and lower covers.

[0094] In the embodiment of the present invention, a plurality of horizontally spaced branch channels 111 are provided in the block-shaped mounting portion 110. The axis of each branch channel 111 is parallel to the direction of liquid flow in the water supply channel 1. Preferably, the axes of each branch channel 111 are in the same horizontal plane and are arranged at equal intervals in the horizontal and vertical directions along the direction of liquid flow in the water supply channel 1, so that the additive mixture in each part of the water supply channel 1 flows evenly into the corresponding venturi tube 19. At the same time, the two ends of each branch channel 111 are respectively connected to the opposite sides of the block-shaped mounting portion 110; a venturi tube 19 is coaxially plugged and installed in each branch channel 111, and the two ends of the venturi tube 19 are respectively connected to the upstream portion 8 and the downstream portion 9 of the water supply channel 1 on the opposite sides of the block-shaped mounting portion 110, so that the additive mixture flows into the downstream portion 9 of the water supply channel 1 after passing through the venturi tube 19 for foaming.

[0095] In addition, a notch 112 is defined on the lower sidewall of the block-shaped mounting portion 110. This notch 112 extends perpendicular to the direction of liquid flow within the water supply channel 1. This notch 112 connects each branch channel 111 to the vent chamber 120 below. This notch 112 is located directly below the negative pressure suction port 191 of each venturi tube 19, connecting the interior of each venturi tube 19 through the negative pressure suction port 191 and the notch 112 to the vent chamber 120. Two sealing rings 190 are sleeved on the outer wall of the venturi tube 19, located upstream and downstream of the notch 112, respectively. These rings seal the gap between the venturi tube 19 and the branch channel 111, preventing liquid flowing through the water supply channel 1 from entering the vent chamber 120 through this gap.

[0096] Preferably, a downwardly facing semi-annular opening is provided on the wall of the venturi tube 19, extending halfway around the wall. The semi-annular opening is located directly above the strip notch 112, and the semi-annular opening constitutes a negative pressure suction port 191 of the venturi tube 19. In the direction of liquid flow in the water supply channel 1, the width of the semi-annular opening is smaller than the width of the strip notch 112, to ensure that sufficient negative pressure can be generated at the negative pressure suction port 191 to draw air from the outside atmosphere into the venturi tube 19. Further preferably, the semi-annular opening is located on the side of the strip notch 112 near the upstream portion 8 of the water supply channel 1, so that the negative pressure suction port 191 formed by the semi-annular opening falls entirely within the corresponding overlapping range of the strip notch 112, preventing the inhaled air from being disturbed by the tube wall and causing turbulent flow interference.

[0097] In the embodiment of the present invention, the branch channel 111 is a straight pipe channel whose axis extends in the horizontal direction; the venturi tube 19 is a straight pipe structure coaxially inserted in the straight pipe section, and the straight pipe structure is divided into two sections with different outer radial dimensions, namely a liquid inlet pipe section 194 with a smaller outer diameter and a liquid outlet pipe section 195 with a larger outer diameter; the liquid inlet pipe section 194 and the liquid outlet pipe section 195 are coaxially connected, the non-connected end of the liquid inlet pipe section 194 is the liquid inlet end 192 of the venturi tube 19, and the non-connected end of the liquid outlet pipe section 195 is the liquid outlet end 193 of the venturi tube 19; the liquid inlet pipe section 194 is correspondingly coaxially inserted in the branch channel 111 The outer radial dimension of the liquid inlet pipe section 194 is equal to the inner circumferential aperture dimension of the branch channel 111, and the liquid outlet pipe section 195 is located outside the branch channel 111 and at the downstream portion 9 of the water supply channel 1. The liquid outlet pipe section 195 is coaxially arranged with the liquid inlet pipe section 194 and is connected via an annular right-angled stepped surface. The annular end surface of the annular right-angled stepped surface is located at the end of the liquid inlet pipe section 194 and abuts against the outer portion of the branch channel 111 on the side of the mounting portion 110 facing the downstream portion 9 of the water supply channel 1, so that the venturi tube 19 is inserted and installed on the mounting portion 110 accordingly to position the insertion position by using the above-mentioned abutment.

[0098] Preferably, the end of the branch channel 111 that is connected to the upstream portion 8 of the water supply channel 1 is provided with a circle of annular ribs 113 that radially protrudes inward. The inner radial dimension of the annular rib 113 is smaller than the radial dimension of the outer peripheral wall of the liquid inlet pipe section 194 of the venturi tube 19 and is greater than or equal to the radial dimension of the inner peripheral hole of the liquid inlet pipe section 194, so that after the liquid inlet pipe section 194 of the venturi tube 19 is correspondingly inserted into the branch channel 111, the inserted end and the annular rib 113 are limitedly abutted, 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 limited abutment, the axial length of the liquid 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 liquid inlet pipe section 194 and the liquid inlet annular end surface of the liquid outlet pipe section 195 can both achieve limited abutment with the mounting portion 110.

[0099] In this embodiment of the present invention, an outwardly protruding mounting protrusion 199 is provided on the outer wall of the liquid outlet pipe section 195. The mounting protrusion 199 extends in any tangential direction of the liquid outlet pipe section 195. Preferably, the mounting protrusion 199 is located near the liquid outlet end 193 of the liquid outlet pipe section 195, so that the user can grasp the mounting protrusion 199 and drive the venturi tube 19 into the corresponding branch channel 111. At the same time, the lower cover 32 is provided with an upwardly protruding mounting post 130 located within the water supply channel 1. The mounting protrusion 199 is correspondingly placed on the top of the mounting post 130. A screw 131 passes through the mounting protrusion 199 from top to bottom and then engages with the mounting post 130 for installation.

[0100] 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 in the direction of liquid flow. The two inclined surfaces 81 are parallel and the distance between them is greater than the radial dimension of the outer wall of the venturi tube 19, so that the additive mixture flowing into the venturi tube 19 flows upward under the action of the upward inclined inner wall, reducing the liquid flow rate and avoiding the generation of 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 flat surfaces 91, and the two flat surfaces 91 are parallel and the distance between them is greater than the radial dimension of the outer wall of the venturi tube 19. It 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 pipe diameter of the water supply channel 1 on the downstream side of the Venturi tube 19 is larger than that on the upstream side, thereby avoiding excessive pressure on the downstream side and causing poor flow of the additive mixture; in particular, when a lot of 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, thereby avoiding the accumulation of foam at the liquid outlet of the Venturi tube 19 and affecting the smoothness of the liquid flow in the water supply channel 1.

[0101] 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 inclined surface 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 inclined surface 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 inclined surface 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 inclined surface 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.

[0102] In an embodiment of the present invention, the internal pipeline of the venturi tube 19 is divided into three pipe sections that are connected in sequence and coaxially arranged from the liquid inlet end 192 to the liquid outlet end 193, namely a reduced pipe section 196, a straight pipe section 197 and an expanded pipe section 198; the reduced pipe section 196 is a conical pipe section with a gradually narrowing aperture along the direction of liquid flow; the straight pipe section 197 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 pipe section 196, or greater than or equal to the maximum pipe diameter of the expanded pipe section 198; the expanded pipe section 198 is a conical pipe section with a gradually widening aperture along the direction of liquid flow; a semicircular opening is provided on the lower part of the pipe wall of the straight pipe section 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 section 197.

[0103] In an embodiment of the present invention, a mixing structure 700 is provided on the water supply channel 1 upstream of the venturi tube 19, and the connection between the dosing unit and the water supply channel 1 is located on the portion of the dosing channel 1 upstream of the mixing structure 700. The mixing structure 700 mixes the dosing additive and the water supply to form an additive mixture.

[0104] The water supply channel 1 of the additive dosing device 100 is provided with a multi-stage mixing structure for forming a vortex water flow in the water supply channel 1 to mix the added additives with the incoming water; the liquid outlet structure 500, the outlet of the water supply channel 1 is connected to the liquid outlet structure 500, and is used to add the mixed additives and water.

[0105] By setting a mixing structure in the water supply channel, the additives and water in the water supply channel are fully mixed, so that the additives and incoming water drawn from the water supply channel of the additive delivery device are pre-mixed evenly before entering the Venturi tube for foaming, thereby further improving the foaming efficiency of the additive mixture, thereby achieving a significant technical advancement in using a mixture containing foam to perform enhanced essence washing on the clothes in the washing drum.

[0106] 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: as shown in Figure 7, a mixing chamber 16 is provided in series on the water supply waterway 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, thereby mixing the added additive with the incoming water.

[0107] As shown in Figures 8 to 13, an additive dosing device is introduced in an embodiment of the present invention, which includes a water supply waterway 1 for water supply; a flushing waterway 4, which is connected to the temporary storage chamber 5 and is used to supply flushing water; a dosing unit 7, which is used to dosing additives into the flushing waterway 4 and / or the temporary storage chamber 5, and the flushing water flow and the dosed additives are mixed in the temporary storage chamber 5 to form an additive mixture; a negative pressure pipe 6 is provided on the water supply waterway 1, and the negative pressure suction port 191 of the negative pressure pipe 6 is respectively connected to the external atmosphere and the temporary storage chamber 5; when the water supply water flows through the negative pressure pipe 6, negative pressure is generated at the negative pressure suction port 191, and the negative pressure is used to simultaneously draw the external air and the additive mixture in the temporary storage chamber 5 into the water supply waterway 1 from the negative pressure suction port 191, and stimulate the generation of foam to form an additive mixture containing foam.

[0108] By providing a negative pressure pipe in the water supply circuit, the water flowing through the water supply circuit simultaneously extracts the additive mixture and outside air from the temporary storage chamber, allowing air particles to mix into the additive mixture. This achieves the purpose of using the air particles to stimulate the additive mixture to foam, thereby achieving an additive mixture containing foaming particles with better washing effect, thereby achieving a significant technical advancement in improving the activity of the additives and enhancing the washing effect of the added additive mixture on clothes. In particular, outside air is injected into the additive mixture in the temporary storage chamber through the negative pressure suction port of the negative pressure pipe, so that all additive solution extracted into the water supply circuit is stimulated by the pumped air, thereby significantly improving the amount of foaming of the additive mixture released by the dispensing device.

[0109] In the embodiment of the present invention, the negative pressure pipe 6 includes a venturi tube 19, and the liquid inlet end 192 and the liquid outlet end 193 of the venturi tube 19 are both connected to the water supply waterway 1, so that the venturi tube 19 is connected in series to the water supply waterway 1, so that all the water supply flow flowing through the water supply waterway 1 flows through the venturi tube 19; the venturi tube 19 includes a contracting pipe 196, a negative pressure straight pipe 197 and an expanding pipe 198 arranged in sequence from the liquid inlet end 192 to the liquid outlet end 193; a negative pressure suction port 191 is provided on the pipe wall of the negative pressure straight pipe 197, which connects the inside and outside of the venturi tube 19; the negative pressure suction port 191 is connected to the temporary storage chamber 5 through the delivery pipe 11, and is used to extract the additive mixture in the temporary storage chamber 5; an air inlet 12 is provided in the middle of the delivery pipe 11, and the air inlet 12 is connected to the outside atmosphere through the suction pipe 10, and is used to inhale external air.

[0110] In an embodiment of the present invention, a one-way check structure is provided on the intake pipe 10 and / or at the air inlet 12 connecting the intake pipe 10 and the delivery pipe 11, which blocks the additive mixture flowing through the delivery pipe 11 from being discharged out of the intake pipe 10. The one-way check structure can be any structure in the prior art that can achieve unidirectional airflow; preferably, the one-way check structure is that the air inlet 12 connecting the intake pipe 10 and the delivery pipe 11 is a small hole with an aperture less than 5 mm, preferably a small hole approximately equal to 1 mm, so that the air inlet 12 with a smaller aperture cannot allow the washing additive mixture to flow out, and can only allow gas to flow in for exchange, thereby making the air inlet 12 with a smaller aperture constitute a one-way check structure.

[0111] Further preferably, the one-way check structure can also be a one-way ventilation valve provided on the intake pipe 10, which is used to ensure that only the air flow from the outside to the delivery pipe 11 can flow through the intake pipe 10 (not indicated in the drawings).

[0112] In an embodiment of the present invention, the delivery pipeline 11 includes a horizontal pipe section 111 and a vertical pipe section 112. One end of the horizontal pipe section 111 is connected to the negative pressure suction port 191 opened on one side of the pipe wall of the horizontally extending Venturi tube 19, and the other end is connected to the upper end of the vertical pipe section 112. The lower end of the vertical pipe section 112 is connected to the bottom of the temporary storage chamber 5. The air inlet 12 is provided in the middle of the horizontal pipe section 111; the top of the temporary storage chamber 5 is respectively connected to the air intake 12 provided on the suction pipeline 10 and the delivery pipeline 11. The connection points of the suction pipeline 10, the air intake 12 and the temporary storage chamber 5 are all higher than the maximum liquid level height in the temporary storage chamber 5, which is used to connect the air inlet 12 provided on the delivery pipeline 11 to the suction pipeline 10 through the top space of the temporary storage chamber 5.

[0113] In the embodiment of the present invention, a ventilation and liquid inlet chamber 015 is provided on one side of the temporary storage chamber 5. The bottom wall of the ventilation and liquid inlet chamber 015 is higher than the maximum liquid level in the temporary storage chamber 5, and the top of the ventilation and liquid inlet chamber 015 is flush with the top of the temporary storage chamber 5; the suction pipe 10 and the flushing water channel 4 are both connected to the ventilation and liquid inlet chamber 015, and the air inlet 12 provided on the delivery pipe 11 is connected to the top of the ventilation and liquid inlet chamber 015; preferably, the opposite sides of the ventilation and liquid inlet chamber 015 are respectively the first side and the second side, and the first side is connected to the temporary storage chamber 5. The storage cavity 5 is connected, and the second side is connected to the air intake pipe 10 and the flushing water channel 4. The bottom wall of the ventilation and liquid inlet cavity 015 is gradually inclined downward from the first side to the second side; further preferably, the air intake pipe 10 and the flushing water channel 4 are respectively arranged at the opposite ends of the first side of the ventilation and liquid inlet cavity 015, and the inlets of the air intake pipe 10 and the flushing water channel 4 are arranged perpendicular to each other to avoid the incoming liquid from flowing out of the air intake pipe 10; further preferably, the bottom wall height of the air intake pipe 10 is higher than the bottom wall height of the flushing water channel 4.

[0114] At the same time, in the present invention, the intake pipe 10 is set as a pipe structure with a certain height, and the intake pipe 10 is lower than the height of the air inlet 12, so that when a large amount of additive mixture enters the temporary storage chamber 5 and exceeds the maximum liquid level height, the additive mixture in the temporary storage chamber 5 can overflow from the intake pipe 10 to avoid the additive mixture flowing into the water supply channel 1 through the air inlet, so that the intake pipe 10 integrates the dual functions of air supply and discharge.

[0115] In this embodiment of the present invention, the air inlet 12 is located directly above the connection between the ventilation and liquid inlet chamber 015 and the temporary storage chamber 5. This serves to connect the lowest point in the middle of the delivery pipeline 11 with the ventilation and liquid inlet chamber 015 and the top space of the temporary storage chamber 5. This allows the air inlet 12 of the delivery pipeline 11 to communicate with the suction pipeline 10 through the ventilation and liquid inlet chamber 015 and the top space of the temporary storage chamber 5, thereby drawing air from the outside atmosphere into the delivery pipeline 11. This arrangement allows the suction pipeline 10 and the air inlet 12 to communicate by utilizing the top space of the temporary storage chamber 5 and the ventilation and liquid inlet chamber 015, which never retain the detergent additive mixture.

[0116] In an embodiment of the present invention, the dosing unit 7 includes a liquid dosing channel 71, a liquid storage chamber 8 and a dosing pump 9; the two ends of the liquid dosing channel 71 are respectively connected to the liquid storage chamber 8 and the flushing water channel 4, and the liquid dosing channel 71 is provided with a dosing pump 9, which is used to generate a driving force when the dosing pump 9 is working to extract the additive in the liquid storage chamber 8 into the flushing water channel 4; preferably, the liquid dosing channel 71 is provided with a one-way valve that guides the liquid dosing channel 71 in one direction, so as to control the additive to flow only from the liquid storage chamber 8 to the flushing water channel 4. The liquid storage chamber 8 can contain any one or a combination of any existing clothing treatment additives such as detergent, softener, rinse agent, disinfectant, bleach, fragrance, etc.; of course, the dosing unit 7 can also include multiple liquid storage chambers 8, each storing different types of clothing treatment additives, so as to be dosed into the temporary storage chamber simultaneously or separately; at the same time, when multiple liquid storage chambers 8 are set, each liquid storage chamber 8 can be connected to the flushing water channel 4 through different liquid dosing channels, or can be connected to the flushing water channel 4 through the same liquid dosing channel.

[0117] The embodiment of the present invention also introduces an additive dispensing method of the additive dispensing device, which includes:

[0118] The additive in the liquid storage chamber is added to the flushing water channel;

[0119] Flushing water flows into the flushing water channel, and the flushing water flushes the added additives into the temporary storage chamber to form an additive mixed liquid;

[0120] Water flows into the water supply channel. When the water flows through the negative pressure pipe, negative pressure is generated at the negative pressure suction port of the negative pressure pipe. The negative pressure draws the additive mixture in the temporary storage chamber and the outside air into the water supply channel.

[0121] When the additive mixture and the outside air flow into the water supply channel together, they mix and form foam, and the additive mixture containing foam is discharged outward along with the water supply flow.

[0122] In the embodiment of the present invention, the above-mentioned additive dispensing method can be applied to the additive dispensing device described in the above-mentioned embodiment of the present invention, and can also be applied to any other type of additive dispensing device.

[0123] In an embodiment of the present invention, during the execution of the additive dosing program of the washing machine, the various steps in the above-mentioned additive dosing method can be executed in sequence to complete the foaming and dosing of the additive; it can also be performed in a cycle multiple times during the dosing process, so that the additive is foamed and then added in batches, which can also achieve the above-mentioned effect of foaming the additive and performing essence washing on the clothes in the drum.

[0124] In the embodiment of the present invention, the total amount of the additive mixture formed in the temporary storage chamber is less than the amount corresponding to the maximum liquid level of the temporary storage chamber. The maximum liquid level of the temporary storage chamber is lower than the point where the negative pressure suction port of the negative pressure tube is connected to the outside air, so as to ensure that the additive mixture in the temporary storage chamber does not flow out through the air inlet.

[0125] A washing machine is also introduced in an embodiment of the present invention, which includes a washing drum for holding a load to be processed, and also includes any of the above-mentioned additive delivery devices, the inlet of the water supply circuit and the inlet of the flushing circuit of the additive delivery device are respectively connected to the water inlet pipe of the washing machine, and the outlet of the water supply circuit is connected to the liquid outlet structure, and the liquid outlet structure is provided on the shell, and / or door body, and / or water drum, and / or window pad of the washing machine, and the liquid outlet structure sprays a foamy mixture formed by the additive and water supply into the washing drum of the washing machine.

[0126] At the same time, in an embodiment of the present invention, the additive dosing device shown in Figures 3 to 7 and the additive dosing device shown in Figures 8 to 13 can also be integrated, that is, the various structures in the above different figures can be integrated and installed on the same additive dosing device at the same time.

[0127] As shown in Figures 1 to 13, in this embodiment, the top of the water box 2 of the additive dispensing device 100 is an upper cover 3. The water supply waterway 1, flushing waterway 4, dispensing pipe 11, suction pipe 10, and other waterway structures can all be arranged inside the upper cover 3. The outlet of the water supply waterway 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 waterway 1, and the outlet end of the conduit 600 is connected to the liquid outlet structure 500 provided outside the water box 2. Preferably, the upper cover 3 includes an upper cover body 31 and a lower cover body 32 that are interlocked with each other. The upper cover body 31 and the lower cover body 32 are relatively spliced ​​together to form the water supply waterway 1, flushing waterway 4, dispensing pipe 11, suction pipe 10, and other waterway structures at the interface. Further preferably, the upper cover body 31 and the lower cover body 32 of the upper cover 3 are connected by a welding process to form a closed and pressure-bearing waterway structure inside.

[0128] Thus, the water channel structure of the additive dosing device 100 can be integrated on the upper cover 3, so that the water intake and additives of the dosing device 100 are directly dosed through the water supply channel 1 inside the upper cover 3, thereby achieving the effect of the additives directly flowing out from the outlet on the outer peripheral side of the upper cover 3 for dosing.

[0129] Of course, the water supply channel 1, the flushing channel 4, the delivery pipeline 11, the air suction pipeline 10 and other water channel structures can also be set as independent pipelines.

[0130] In this embodiment, the dosing unit includes a liquid storage chamber for storing additives, and the liquid storage chamber is connected to the water supply channel 1; the dosing device 100 is also provided with a power unit to provide power for pumping the additives in the liquid storage chamber into the water supply channel.

[0131] 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 channel 1, providing a driving force for the liquid in the liquid extraction channel to flow from the liquid storage chamber to the water supply channel 1. In this embodiment, the power unit can also be provided with other existing structures, for example: the power unit is a suction pump, the suction port of the suction pump is connected to the water supply channel 1, so that a negative pressure is formed in the water supply channel 1 and the additive in the liquid storage chamber is extracted into the water supply channel 1 through the liquid extraction channel; and / or, the power unit can also be a venturi tube provided on the water supply channel 1, the venturi tube is provided with a negative pressure area with a sudden change in diameter, the negative pressure area can use the water flowing through it to generate negative pressure, the negative pressure area of ​​the venturi tube is provided with a suction port, and the suction port is connected to the liquid storage chamber through the liquid extraction channel (not indicated in the drawings).

[0132] In this embodiment, the additive dispensing device 100 includes multiple liquid storage chambers, each of which can hold different categories of additives, such as detergents, softeners, fragrances, disinfectants, etc.; a control device is provided on the dispensing device 100, which is used to control each liquid storage chamber to be connected to the water supply channel 1 one by one or in combination, so as to dispense any one or multiple combinations of additives into the water supply channel 1.

[0133] In this embodiment, the control device can be set to any existing structure that can achieve the above-mentioned functions; for example: in this embodiment, each liquid storage chamber can be connected to the water supply channel 1 through a flow channel provided with a control valve, so as to achieve the effect of separate or combined on-off control of each flow channel by controlling the opening and closing of each control valve, thereby achieving the purpose of independently adding any category of additives or simultaneously adding multiple categories of additives; each liquid storage chamber can also be connected to different inlets of the same reversing valve in a one-to-one correspondence, and the outlet of the reversing valve is connected to the water supply channel 1. A rotatable valve core is provided in the reversing valve for controlling the connection between any or combined inlets and outlets, which can also achieve the purpose of independently adding any category of additives or simultaneously adding multiple categories of additives (not indicated in the drawings).

[0134] In this embodiment, a liquid storage box is provided in the water box 2 of the dosing device 100, and the liquid storage box can be pulled outward and installed in the water box 2 of the additive dosing device 100; at least one liquid storage cavity for storing additives is provided in the liquid storage box, and each liquid storage cavity on the liquid storage box is connected to the water supply waterway 1 through a communicating vessel, and a control device is provided on the communicating vessel for controlling the liquid storage cavity to be selectively or in combination and controllably connected to the water supply waterway 1.

[0135] In this embodiment, the inlet of the water supply channel 1 is provided on the outer wall of the water box 2 , and the inlet of the water supply channel 1 is connected to the water supply source, so that water can flow into the water supply channel 1 .

[0136] In this embodiment, the additive dispensing device 100 is installed on a washing machine, and the water source for the additive dispensing device is the washing machine's water inlet pipe. The inlet of the water supply waterway 1 and the inlet of the flushing waterway 4 are respectively connected to the washing machine's water inlet pipe in a controllable manner, so that the washing water can flow into the water supply waterway 1 and / or the flushing waterway 4 through the inlet. The water box 2 of the additive dispensing device 100 is provided with a water inlet joint, the two ends of which are respectively connected to the inlet of the water supply waterway 1, the inlet of the flushing waterway 4, and the washing machine's water inlet pipe. Further preferably, a control valve for controlling the on-off of the waterway is installed at the water inlet joint. The inlet of the water supply waterway 1 is provided with a first on-off valve 13 for controlling the on-off of the waterway, and the inlet of the flushing waterway 4 is provided with a second on-off valve 14 for controlling the on-off of the waterway.

[0137] By installing the aforementioned additive dispensing device 100 on a washing machine, the present invention allows the washing machine's additives to flow directly through the water supply channel 1 to the liquid outlet structure 500 and be sprayed directly into the washing tub 300 from the liquid outlet structure 500. This allows the washing machine's additives to flow directly into the washing tub 300 through the water channel of the dispensing device 100 and be sprayed onto the load to be processed, without passing through a water box or the water storage drum 200 outside the washing tub 300. This achieves the purpose of directly spraying the additive solution onto the load to be processed within the washing tub 300. Furthermore, through the aforementioned arrangement, a washing machine equipped with the aforementioned additive dispensing device 100 can achieve the goal of spraying the additive solution formed by mixing the additive with a small amount of incoming water in the water supply channel 1 directly onto the load to be processed within the washing tub 300, thereby significantly improving the utilization rate of the dispensed additives.

[0138] In this embodiment, a liquid suction port is provided in the middle of the flushing water channel 4, and the liquid suction port is connected to the dosing unit 7, so that the additive is drawn into the flushing water channel 4 from the liquid suction port. Preferably, the flushing water channel 4 is connected to the outlet of the pump or the venturi tube for liquid extraction, the inlet of the pump or the negative pressure port of the venturi tube is connected to the outlet of the dosing channel 71, the inlet of the dosing channel 71 is connected to the outlet of the communicating vessel, and the multiple inlets of the communicating vessel are connected to each liquid storage chamber 8 in a one-to-one correspondence, so that the additive in the liquid storage chamber 8 is drawn into the dosing channel 71 through the above-mentioned flow channel under the driving action of the pump or the venturi tube for liquid extraction.

[0139] In this embodiment, the liquid outlet structure 500 can be arranged on the shell, and / or door body, and / or water drum 200, and / or window pad 400 of the washing machine. The spray outlet of the liquid outlet structure 500 is opened toward the inside of the washing drum 300, and the additive sprayed by the liquid outlet structure 500 is directly sprayed into the inside of the washing drum 300.

[0140] Preferably, in this embodiment, the specific installation method of the liquid outlet structure 500 is as follows:

[0141] As shown in Figures 1 and 2, a circle of window gasket 400 is installed at the mouth of the water drum 200. The window gasket 400 is cylindrical, and one end of the cylindrical window gasket 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 equipped 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 gasket 400, and the gap space is directly connected to 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 on the inner peripheral side of the window pad 400 has a spray outlet, and the portion on the outer peripheral 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.

[0142] In this embodiment, the liquid outlet structure 500 can be any existing spray structure, and the spray outlet can be configured as a plurality of spray holes arranged at intervals, or can be configured as a single opening.

[0143] In this embodiment, the washing machine is provided with an independent conduit 600, located outside the water box of the additive dispensing device 100 and outside the water drum 200. The ends of the conduit 600 are connected to the inlet of the liquid outlet structure 500 and the outlet of the water supply channel 1, respectively. This allows the additive solution supplied by the water supply channel 1 to be directly drained through the conduit 600 to the liquid outlet structure 500, thereby achieving the effect of direct spraying into the washing drum 300 of the washing machine. Preferably, the conduit 600 is made of a material such as rubber and is capable of bending and deforming.

[0144] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An additive delivery device, comprising: A water supply waterway, for water supply 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: At least one venturi tube is 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, external air enters from the negative pressure suction port and mixes with the additive mixed liquid to stimulate it to produce foam.

2. The additive delivery device according to claim 1, characterized in that: A mounting portion radially protruding from the inner wall of the water channel is provided in the water supply water channel, and the mounting portion divides the water supply water channel into an upstream part and a downstream part; the Venturi tubes provided on the water supply water channel are all 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 water channel.

3. The additive delivery device according to claim 2, 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. The additive delivery device according to claim 3, 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. The additive delivery device according to claim 4, 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. The additive delivery device according to claim 5, 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 small-diameter inlet pipe section is coaxially inserted into the branch channel, and the large-diameter outlet pipe section is located outside the installation block and in the downstream part of the water supply channel; 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 circumference of the branch channel; the end surface of the inlet pipe section connected to the outlet pipe section abuts against the side of the installation part facing the downstream part of the water supply channel; Preferably, one end of the branch channel connected to the upstream part of the water supply waterway is provided with a circle of annular ribs protruding radially inward, and the inner circumferential radial dimension of the annular ribs is smaller than the radial dimension of the outer circumferential wall of the liquid inlet pipe section of the venturi tube; Preferably, a mounting protrusion extending outward is provided on the outer tube wall of the liquid outlet pipe section, and a mounting column protruding upward is provided on the lower cover body. The mounting protrusion is correspondingly placed on the top of the mounting column, and the screw passes through the mounting protrusion from top to bottom and is threadedly engaged with the mounting column for installation.

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

8. An additive delivery device according to any one of claims 1 to 6, characterized in that: The venturi tube is divided into three pipe sections which are connected in sequence and arranged coaxially from the liquid inlet end to the liquid outlet end, namely, a contracted pipe section, a straight pipe section and an expanded pipe section; The conical pipe section is a conical pipe section whose aperture gradually narrows along the liquid flow direction; The straight pipe section is a cylindrical pipe section with a consistent hole diameter, and the pipe diameter is greater than or equal to the maximum pipe diameter of the shrinking pipe section, or greater than or equal to the maximum pipe diameter of the expanding pipe section; The expanded pipe section is a conical pipe section whose aperture gradually expands along the direction of liquid flow; A semicircular opening extending along the circumferential direction of the pipeline is provided on the lower part of the straight pipe section, and the semicircular opening constitutes a negative pressure suction port; Preferably, the negative pressure suction port covers at least one third of the height of the lower part of the pipe wall of the straight pipe section.

9. An additive delivery 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 channel upstream of the venturi tube, and the connection point between the dosing unit and the water supply channel is located upstream of the mixing structure. The mixing structure mixes the dosed additive with the water supply to form an additive mixed liquid.

10. An additive delivery device, characterized in that: include, A water supply waterway, for water supply to flow through; A flushing water channel is connected to the temporary storage chamber and is used for flushing water to flow through; A delivery unit is used to deliver additives into the flushing waterway and / or the temporary storage chamber, and the flushing water flow and the delivered additives enter the temporary storage chamber together and mix to form an additive mixed liquid; A negative pressure pipe is provided on the water supply waterway, and the negative pressure suction port of the negative pressure pipe is connected to the external atmosphere and the temporary storage chamber respectively; when the water supply water flows through the negative pressure pipe, negative pressure is generated at the negative pressure suction port, and the negative pressure is used to simultaneously draw the external air and the additive mixture in the temporary storage chamber into the water supply waterway from the negative pressure suction port, thereby stimulating the generation of foam.

11. An additive delivery device according to any one of claims 1 to 9, characterized in that: include, A water supply waterway, for water supply to flow through; A flushing water channel is connected to the temporary storage chamber and is used for flushing water to flow through; A delivery unit is used to deliver additives into the flushing waterway and / or the temporary storage chamber, and the flushing water flow and the delivered additives enter the temporary storage chamber together and mix to form an additive mixed liquid; A negative pressure pipe is provided on the water supply waterway, and the negative pressure suction port of the negative pressure pipe is connected to the external atmosphere and the temporary storage chamber respectively; when the water supply water flows through the negative pressure pipe, negative pressure is generated at the negative pressure suction port, and the negative pressure is used to simultaneously draw the external air and the additive mixture in the temporary storage chamber into the water supply waterway from the negative pressure suction port, thereby stimulating the generation of foam.

12. An additive delivery device according to claim 10 or 11, characterized in that: The negative pressure pipe includes a venturi tube, the liquid inlet end and the liquid outlet end of the venturi tube are both connected to the water supply waterway, so that the water supply water flows through the venturi tube; the venturi tube includes a contraction pipeline, a negative pressure straight pipeline and an expansion pipeline which are sequentially connected and arranged from the liquid inlet end to the liquid outlet end; a negative pressure suction port is arranged on the pipe wall of the negative pressure pipeline to connect the inside and outside of the pipeline; The negative pressure suction port is connected to the temporary storage chamber via a delivery pipeline, and is used to extract the additive mixture in the temporary storage chamber; An air inlet is provided in the middle of the delivery pipeline, and the air inlet is connected to the outside atmosphere through an air suction pipeline for inhaling external air.

13. The additive delivery device according to claim 12, characterized in that: A one-way check structure is provided on the air intake pipeline and / or at the connection point between the air intake pipeline and the delivery pipeline to prevent the additive mixture flowing through the delivery pipeline from being discharged out of the air intake pipeline; Preferably, the air inlet connecting the air intake pipeline and the delivery pipeline is a small hole, and the aperture of the small hole prevents the additive mixture from flowing out; Further preferably, the air inlet is a small hole with a diameter less than 5 mm.

14. The additive delivery device according to claim 13, characterized in that: The delivery pipeline includes a horizontal pipe section and a vertical pipe section. One end of the horizontal pipe section is connected to a negative pressure suction port opened on one side of the pipe wall of the horizontally extending Venturi tube, and the other end is connected to the upper end of the vertical pipe section. The lower end of the vertical pipe section is connected to the bottom of the temporary storage chamber. An air inlet is arranged in the middle of the horizontal pipe section. The temporary storage chamber is provided with a maximum liquid level height of the additive mixture, and the temporary storage chamber space above the maximum liquid level height is a ventilation section; the ventilation section is connected with the air intakes arranged on the suction pipeline and the delivery pipeline respectively, and is used to connect the air intakes arranged on the delivery pipeline with the suction pipeline through the ventilation section of the temporary storage chamber.

15. The additive delivery device according to claim 14, characterized in that: A ventilation and liquid inlet cavity is provided on one side of the temporary storage cavity, and the ventilation and liquid inlet cavity is connected with the ventilation part of the temporary storage cavity; the bottom wall of the ventilation and liquid inlet cavity is higher than the maximum liquid level in the temporary storage cavity, and the top of the ventilation and liquid inlet cavity is flush with the top of the temporary storage cavity; The air suction pipeline and the flushing water channel are both connected to the ventilation and liquid inlet chamber, and the air inlet arranged on the delivery pipeline is connected to the top of the ventilation and liquid inlet chamber.

16. The additive delivery device according to claim 15, characterized in that: The two opposite sides of the ventilation and liquid inlet cavity are respectively a first side and a second side, the first side is connected to the temporary storage cavity, and the second side is connected to the suction pipeline and the flushing water path, and the bottom wall of the ventilation and liquid inlet cavity is gradually inclined downward from the first side to the second side; The air suction pipeline and the flushing water channel are respectively arranged at two opposite ends of the first side of the ventilation liquid inlet cavity, and the inlet directions of the air suction pipeline and the flushing water channel are arranged perpendicularly to each other.

17. The additive delivery device according to claim 15, characterized in that: The air inlet is located just above the ventilation part of the ventilation and liquid inlet chamber and the temporary storage chamber, and is used to connect the lowest point in the middle of the delivery pipeline and the ventilation and liquid inlet chamber with the ventilation and liquid inlet chamber at the top of the temporary storage chamber, so that the air inlet of the delivery pipeline is connected through the ventilation part at the top of the temporary storage chamber, the ventilation and liquid inlet chamber and the suction pipeline, so as to draw air from the outside atmosphere into the delivery pipeline.

18. An additive delivery device according to any one of claims 10 to 17, characterized in that: The delivery unit includes a delivery pipeline, a liquid storage chamber and a delivery pump; the two ends of the delivery pipeline are respectively connected to the liquid storage chamber and the flushing waterway, and the delivery pump is provided on the delivery pipeline, which is used to generate a driving force when the delivery pump is working to extract the additive in the liquid storage chamber into the flushing waterway; Preferably, a one-way valve is provided on the delivery pipeline to guide the delivery pipeline in one direction, so as to control the additive to flow only from the liquid storage chamber to the flushing water channel.

19. An additive delivery method of an additive delivery device, characterized in that: The additive in the liquid storage chamber is put into the flushing water channel; Flushing water is introduced into the flushing water channel, and the flushing water flushes the added additives into the temporary storage chamber to form an additive mixed liquid; Water flow enters the water supply waterway, and when the water flow passes through the negative pressure pipe, negative pressure is generated at the negative pressure suction port of the negative pressure pipe, and the negative pressure draws the additive mixture in the temporary storage chamber and the outside air into the water supply waterway; When the additive mixture and the outside air flow into the water supply channel together, they mix and form foam, and the additive mixture containing the foam is released to the outside along with the water supply flow.

20. The method for adding additives by using an additive adding device according to claim 19, characterized in that: The total amount of the additive mixture formed in the temporary storage chamber is less than the amount corresponding to the maximum liquid level of the temporary storage chamber. The maximum liquid level of the temporary storage chamber is lower than the point where the negative pressure suction port of the negative pressure tube is connected to the outside air to ensure that the additive mixture in the temporary storage chamber will not flow out through the air inlet.

21. A washing machine comprising a washing drum for holding a load to be processed, characterized in that: It also includes the additive delivery device as described in any one of claims 1 to 20 above, the inlet of the water supply circuit of the additive delivery device is connected to the water inlet pipe of the washing machine, the outlet of the water supply circuit is connected to the liquid outlet structure, the liquid outlet structure is arranged on the shell, and / or the door body, and / or the water drum, and / or the window pad of the washing machine, and the liquid outlet structure sprays a foamy mixture formed by mixing the delivery additive and the water supply into the washing drum of the washing machine.

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