Dropping device

Abstract

A water inlet pipe is arranged in the feeding device and comprises a water inlet pipeline used for guiding inflow water; the liquid storage unit is used for storing an additive, a liquid outlet of the liquid storage unit is communicated with a liquid pumping flow channel, and the liquid outlet end of the liquid pumping flow channel is communicated with the water inlet pipeline; the first one-way valve is arranged at the liquid outlet end of the liquid extraction flow channel, and liquid in the liquid extraction flow channel is unidirectionally conducted from the liquid inlet end to the liquid outlet end; and a safety valve is further arranged in the liquid pumping flow channel, is arranged on the upstream of the first one-way valve and is located on the downstream of the liquid outlet of the liquid storage unit, so that countercurrent liquid is prevented from flowing into the liquid storage unit. The liquid storage device has the beneficial effects that the safety valve is connected between the first one-way valve and the liquid storage unit in series, so that when the first one-way valve is broken down by water, water is prevented from flowing into the liquid storage unit, it is guaranteed that additives in the liquid storage unit cannot be polluted by guided water, and losses caused by breakdown of the first one-way valve are reduced.

Description

Technical Field

[0001] The invention belongs to the field of clothing cleaning, and in particular relates to a dispensing device. Background Art

[0002] Washing machines are frequently used household appliances. With the improvement of living standards and the advancement of technology, some washing machines are equipped with a dispensing device, which is equipped with a liquid storage unit for storing additives and a liquid extraction pipeline, which is connected to the liquid discharge unit and the water supply pipeline of the dispensing device; when washing clothes, the dispensing device can automatically dispense an appropriate amount of additives into the water inlet pipeline according to the current washing program, so that users do not need to add detergent to the washing machine every time they wash clothes, making the washing machine more convenient to use; and compared with manual addition by users, the dispensing device has more precise control over the amount of detergent, which improves the washing effect of clothes.

[0003] In order to prevent the incoming water in the water supply pipe from flowing back into the liquid extraction pipe, a one-way valve is usually provided at the end of the liquid extraction pipe to ensure that the incoming water does not flow back into the liquid storage unit; however, there is a problem: when the tap water pressure is relatively high and / or the valve plate of the one-way valve is aged, when the dispensing device just starts to take in water, the water hammer effect of the water will impact the one-way valve. At this time, if the impact force of the water exceeds the current tolerance threshold of the one-way valve, the incoming water will penetrate the one-way valve and flow into the liquid storage unit, causing the water to flow back into the liquid storage unit and interact with the additives in the liquid outlet unit, resulting in reduced cleaning effect of the additives; in severe cases, the liquid storage unit is disconnected from the liquid extraction pipe under the impact of water, causing the incoming water to flow from the liquid inlet end of the liquid extraction pipe to the washing machine or the bottom plate of the dispensing device, seriously affecting the user experience.

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

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a dispensing device, which blocks water from flowing into the liquid storage unit when the first one-way valve is punctured by water by connecting a safety valve in series between the first one-way valve and the liquid storage unit, thereby solving the problem that when the first one-way valve is punctured, water will flow back along the liquid extraction channel to the inside of the liquid storage unit and contaminate the additive.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a dosing device, which is provided with a water inlet pipe inside, and the water inlet pipe includes a water inlet pipeline for guiding water inlet; a liquid storage unit for storing additives, the liquid outlet of the liquid storage unit is connected with a liquid extraction channel, and the liquid outlet end of the liquid extraction channel is connected with the water inlet pipeline; a first one-way valve is arranged at the liquid outlet end of the liquid extraction channel, so that the liquid in the liquid extraction channel is unidirectionally guided from the liquid inlet end to the liquid outlet end; a safety valve is also arranged in the liquid extraction channel, and the safety valve is arranged upstream of the first one-way valve and downstream of the liquid outlet of the liquid storage unit to prevent the reverse flow of liquid into the liquid storage unit.

[0007] Furthermore, the liquid pumping channel includes, from upstream to downstream, a first flow channel section, a second flow channel section and a third flow channel section, the first flow channel section and the third flow channel section are respectively vertically arranged, and the second flow channel section extends in the horizontal direction; the safety valve and the first one-way valve are respectively arranged in the vertical first flow channel section and the third flow channel section.

[0008] Furthermore, an opening is formed on the top wall of the second horizontal flow channel section, and the opening is communicated with the lower end of the first vertical flow channel section; and a safety valve is arranged at the lower end of the first vertical flow channel section.

[0009] Furthermore, the liquid inlet end and the liquid outlet end of the second flow channel section are respectively provided with buffer zones, the liquid outlet end of the first flow channel section and the liquid inlet end of the third flow channel section are respectively connected to the top wall or bottom wall of the corresponding buffer zone, and the passing area of ​​each buffer zone is respectively larger than the passing area of ​​the middle part of the second flow channel section.

[0010] Furthermore, a protruding support protrusion is provided on the bottom wall of the horizontal second flow channel section. The support protrusion is located below the safety valve, and the top end of the support protrusion abuts against the safety valve.

[0011] Furthermore, the second flow channel section includes a first portion extending horizontally and a fourth portion, which are respectively connected to the first flow channel section and the third flow channel section; a second portion extending and bending along the vertical direction is also connected in series between the first portion and the fourth portion.

[0012] Furthermore, the first part and the fourth part are located on the same horizontal plane, the liquid outlet end of the first part and the liquid inlet end of the fourth part are respectively connected to the vertically arranged second part and the third part, and the liquid outlet end of the third part is connected to the fourth part.

[0013] Furthermore, it also includes a delivery component, which is connected in series to the liquid extraction channel and is used to provide power to the additive in the liquid extraction channel; the delivery component is connected in series between the vertically extending second part and the third part.

[0014] Furthermore, the delivery assembly is arranged outside the water inlet pipe, and a connecting protrusion protruding upward is arranged on the top of the water inlet pipe, and the delivery assembly is installed on the connecting protrusion; the second part and the third part are integrated in the connecting protrusion and are respectively connected to the inlet and outlet of the delivery assembly.

[0015] Furthermore, a first tube body and a second tube body are provided in the delivery device, and the two tube bodies are snapped together to form a water inlet pipeline; at least one of the two tube bodies is provided with a liquid extraction channel, and the liquid extraction channel connects the liquid storage unit and the water inlet pipeline.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: by connecting a safety valve in series between the first one-way valve and the liquid storage unit, when the first one-way valve is penetrated by water, water is blocked from flowing into the liquid storage unit, thereby ensuring that the additive in the liquid storage unit will not be contaminated by the diverted water, and reducing the loss caused by the penetration of the first one-way valve;

[0017] In addition, by forming multiple bends in the pumping channel to increase the fluid resistance coefficient in the pumping channel, the water pressure of the water directed to the safety valve is greatly reduced, preventing water from penetrating the safety valve, thereby ensuring that the safety valve can stably block the backflow of water.

[0018] At the same time, the invention has a simple structure, significant effects and is suitable for popularization and use.

[0019] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0021] Figure 1 Schematic diagram of the water inlet pipeline structure of an embodiment of the present invention;

[0022] Figure 2 is a schematic top view of a water inlet pipeline according to an embodiment of the present invention;

[0023] Figure 3 The embodiment of the present invention Figure 2 AA cross-section diagram;

[0024] Figure 4 The embodiment of the present invention Figure 2 BB cross-section diagram;

[0025] Figure 5It is a schematic structural diagram of the water inlet pipeline of an embodiment of the present invention without the upper pipe section.

[0026] In the figure: 1. first one-way valve; 2. safety valve; 3. groove; 302. connecting joint; 310. first tube body; 320. second tube body; 321. lower tube section; 322. upper tube section; 3221. connecting protrusion; 340. guide groove; 350. sealing rib; 360. water inlet pipeline; 370. pumping channel; 371. first channel section; 372. second channel section; 3721. first part; 3722. second part; 3723. third part; 3724. fourth part; 3725. supporting protrusion; 373. third channel section; 374. buffer zone; 4. water supply joint; 5. water outlet joint; 6. delivery assembly.

[0027] 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 are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] 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.

[0029] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1-5As shown, in an embodiment of the present invention, a dosing device is introduced, which is provided with a water inlet pipe inside, and the water inlet pipe includes a water inlet pipeline 360 ​​for guiding water inlet; a liquid storage unit for storing additives, and the liquid outlet of the liquid storage unit is connected to a liquid extraction channel 370, and the liquid outlet end of the liquid extraction channel 370 is connected to the water inlet pipeline 360; a first one-way valve 1 is arranged at the liquid outlet end of the liquid extraction channel 370, so that the liquid in the liquid extraction channel 370 is unidirectionally guided from the liquid inlet end to the liquid outlet end; a safety valve 2 is also arranged in the liquid extraction channel 370, and the safety valve 2 is arranged upstream of the first one-way valve 1 and downstream of the liquid outlet of the liquid storage unit to prevent the reverse flow of liquid into the liquid storage unit.

[0032] Through the above arrangement, a safety valve 2 is connected in series between the first one-way valve 1 and the liquid storage unit to prevent water from flowing into the liquid storage unit when the first one-way valve 1 is punctured by water, thereby ensuring that the additives in the liquid storage unit will not be contaminated by the diverted water, thereby reducing the loss caused by the puncture of the first one-way valve 1.

[0033] It should be noted that the additives described in the present invention are detergents, and / or softeners, and / or disinfectants, and / or bleaches, and / or water softeners, etc., which are commonly used liquids for treating clothes and / or reducing water hardness.

[0034] In the embodiment of the present invention, the liquid pumping channel 370 is a vertically extending channel, and the upper end and the lower end of the vertical liquid pumping channel 370 are respectively connected to the liquid storage unit and the water inlet pipeline 360.

[0035] In a preferred embodiment of the present invention, the liquid pumping channel 370 includes, from upstream to downstream, a first channel section 371, a second channel section 372 and a third channel section 373, the first channel section 371 and the third channel section 373 are respectively vertically arranged, and the second channel section 372 extends in the horizontal direction; the safety valve 2 and the first check valve 1 are respectively arranged in the vertical first channel section 371 and the third channel section 373.

[0036] Through the above arrangement, multiple bends are formed in the pumping channel 370 to increase the fluid resistance coefficient in the pumping channel 370, thereby significantly reducing the water pressure of the water directed to the safety valve 2, preventing water from penetrating the safety valve 2, thereby ensuring that the safety valve 2 can stably block the backflow of water.

[0037] In the embodiment of the present invention, the top wall of the horizontal second flow channel section 372 is provided with an opening, which is communicated with the lower end of the vertical first flow channel section 371 ; the safety valve 2 is arranged at the lower end of the vertical first flow channel section 371 .

[0038] Through the above arrangement, the opening of the second flow channel section 372 is spaced a short distance from the end wall of the second flow channel section 372. When water flows back to the liquid inlet end of the horizontal second flow channel, it first impacts the end wall of the liquid inlet end, thereby achieving the effect of buffering the diverted water, so that the water enters the first flow channel section 371 after being buffered once, thereby reducing the impact force of the water hammer effect on the safety valve 2, and further ensuring the stability of the safety valve 2 in blocking the diverted water; at the same time, when the additive flows in the forward direction along the liquid extraction channel 370, the additive flows directly from the first flow channel section 371 to the second flow channel section 372, and will not form a buffering effect on the additive, thereby ensuring that the above arrangement will not affect the flow of the additive; in addition, by arranging the first flow channel section 371 above the second flow channel section 372, the backflow water flows vertically upward in the first flow channel section 371, further reducing the water pressure of the backflow water.

[0039] In the embodiment of the present invention, an upwardly protruding connection joint 302 is provided on the top of the water inlet pipe, and the liquid outlet end of the liquid storage unit is pluggably mounted on the connection joint 302; a vertically extending first flow channel section 371 is formed inside the connection joint 302.

[0040] In an embodiment of the present invention, a buffer zone 374 is respectively provided at the liquid inlet end and the liquid outlet end of the second flow channel section 372, the liquid outlet end of the first flow channel section 371 and the liquid inlet end of the third flow channel section 373 are respectively connected to the top wall or the bottom wall of the corresponding buffer zone 374, and the passing area of ​​each buffer zone 374 is respectively larger than the passing area of ​​the middle part of the second flow channel section 372.

[0041] Through the above arrangement, a technical solution is formed in which the additive flows vertically downward along the first flow channel section 371, then flows horizontally along the second flow channel section 372, and finally flows vertically downward along the third flow channel section 373 to the water inlet pipe 360, so that when water flows back in the liquid pumping channel 370, the water pressure of the backflowing water decreases with the rising height.

[0042] In the embodiment of the present invention, each buffer zone 374 is a cylindrical structure with a vertical axis, and the liquid inlet and the liquid outlet of the second flow channel section 372 are coaxially arranged with the corresponding cylindrical buffer zone 374 .

[0043] In the embodiment of the present invention, each buffer zone 374 is respectively provided with a buffer groove formed by an outward depression on the opposite side end wall connected to the second flow channel section 372, so that the backflow water with a faster flow rate can directly impact the exchange groove when it just enters the pumping channel 370, and then fill the corresponding buffer zone 374, and finally flow into the first flow channel section 371, so that the water pressure of the backflow water is greatly reduced, and the impact force of the diversion water under the water hammer effect is greatly reduced.

[0044] In the embodiment of the present invention, the diameter of the cylindrical buffer zone 374 is greater than the horizontal width of the second flow channel section 372 .

[0045] In the embodiment of the present invention, a protruding support protrusion 3725 is provided on the bottom wall of the horizontal second flow channel section 372 . The support protrusion 3725 is located below the safety valve 2 , and the top end of the support protrusion 3725 abuts against the safety valve 2 .

[0046] In an embodiment of the present invention, the second flow channel section 372 includes a first part 3721 extending horizontally and a fourth part 3724, which are respectively connected to the first flow channel section 371 and the third flow channel section 373; a second part 3722 extending and bending in the vertical direction is also connected in series between the first part 3721 and the fourth part 3724; by forming a bend in the second flow channel section 372, the water pressure of the diversion water is reduced.

[0047] In an embodiment of the present invention, the first part 3721 and the fourth part 3724 are located on the same horizontal plane, and the liquid outlet end of the first part 3721 and the liquid inlet end of the fourth part 3724 are respectively connected to the vertically arranged second part 3722 and the third part 3723, and the liquid outlet end of the third part 3723 is connected to the fourth part 3724; so that the multiple bends formed in the second flow channel section 372 can continuously reduce the pressure of the backflow water flowing into the second flow channel section 372, thereby reducing the water pressure of the backflow water flowing into the first flow channel section 371.

[0048] In an embodiment of the present invention, a delivery component 6 is further included, which is connected in series on the liquid extraction channel 370 and is used to provide power for the additive in the liquid extraction channel 370; the delivery component 6 is connected in series between the vertically extended second part 3722 and the third part 3723; by setting the delivery component 6 on the bent second channel, the guide water that has just flowed into the second channel section 372 is decelerated and reduced in pressure before entering the delivery component 6, thereby preventing the backflow water from impacting the impeller of the delivery component 6 and causing damage to the impeller, thereby reducing the damage of the backflow water to the delivery device.

[0049] In an embodiment of the present invention, the delivery component 6 is arranged on the outside of the water inlet pipe, and a connecting protrusion 3221 protruding upward is provided on the top of the water inlet pipe, and the delivery component 6 is installed on the connecting protrusion 3221; the second part 3722 and the third part 3723 are integrated in the connecting protrusion 3221, and are respectively connected to the inlet and outlet of the delivery component 6.

[0050] Through the above-mentioned arrangement, by forming the second part 3722 and the third part 3723 in the upper pipe section 322, while ensuring that the delivery assembly 6 arranged outside the upper pipe section 322 can be connected in series to the second flow channel section 372, the second part 3722 and the third part 3723 are respectively connected to the guide groove 340 of the upper pipe section 322, so that the connecting corners between the parts are integrally formed, thereby improving the structural strength of the connecting position and preventing the liquid extraction channel 370 from leaking at this position.

[0051] In an embodiment of the present invention, the safety valve 2 is a second one-way valve, and the safety valve 2 is unidirectionally connected to the liquid outlet of the liquid pumping channel 370; by arranging two groups of one-way valves in the liquid pumping channel 370, while ensuring one-way connection from the liquid storage unit to the water inlet pipeline 360, when the first one-way valve 1 is punctured, the second one-way valve can automatically block the liquid pumping channel 370 to prevent backflow water from entering the liquid storage unit.

[0052] In another embodiment of the present invention, the safety valve 2 is a control valve, and the opening and closing of the control valve can be controlled by a control instruction; specifically, the control valve is a solenoid valve.

[0053] In another embodiment of the present invention, when water starts to flow in, the safety valve 2 is controlled to be closed.

[0054] In another embodiment of the present invention, the safety valve 2 is normally in a closed state; when the additive is added into the water inlet pipe 360 ​​by the adding device, the safety valve 2 is opened; a pressure sensor is provided in the liquid pumping channel 370, and when the safety valve 2 is opened, the water pressure in the liquid pumping channel 370 is detected in real time to determine whether the detected water pressure is less than a preset water pressure threshold value. If so, the safety valve 2 is kept open; if not, the safety valve 2 is closed.

[0055] In another embodiment of the present invention, the pressure sensor is disposed near the liquid outlet end of the liquid extraction channel 370 .

[0056] When the incoming water penetrates the first one-way valve 1, the water pressure in the pumping channel 370 rises under the impact of the backflow water, and the water pressure when the water is diverted in the pumping channel 370 is much greater than the water pressure when the pumping channel 370 transports the additive; through the above-mentioned arrangement, by obtaining the water pressure in the pumping channel 370, it is possible to accurately determine whether the water has penetrated the first one-way valve 1 according to the fluctuation of the water pressure, and the safety valve 2 can be controlled in time to prevent the backflow water from flowing into the liquid storage unit.

[0057] In the embodiment of the present invention, a first tube body 310 and a second tube body 320 are provided in the delivery device, and the two tube bodies are snapped together to form a water inlet pipeline 360; at least one of the two tube bodies is provided with a liquid extraction channel 370, and the liquid extraction channel 370 connects the liquid storage unit and the water inlet pipeline 360.

[0058] Through the above-mentioned arrangement, the water inlet pipeline 360 ​​is composed of two tube bodies that are snapped together, and the liquid extraction channel 370 is arranged on one of the tube bodies, so that the liquid extraction channel 370 and the tube wall of the corresponding tube body at the connection point are integrally injection molded, thereby improving the structural strength of the connection point, thereby preventing the connection point from leaking, bursting, etc. under the impact of water inflow; in addition, when assembling the water inlet pipeline 360, first insert the first one-way valve 1 into the liquid outlet end of the liquid extraction channel 370, and then snap-fit ​​the two tube bodies to make the installation more convenient.

[0059] In the embodiment of the present invention, the first one-way valve 1 is installed in the third flow channel section 373 of the liquid extraction flow channel 370 .

[0060] In the embodiment of the present invention, the first tube body 310 and the second tube body 320 are respectively grooves 3, and the grooves 3 of the two tube bodies are arranged opposite to each other; the outer peripheries of the grooves 3 of the two tube bodies are provided with radially protruding and relatively fitted fitting surfaces; and the grooves 3 are provided with connecting ports that are connected one by one with each connecting joint 302.

[0061] Through the above arrangement, when the first tube body 310 and the second tube body 320 are buckled together, the water inlet pipeline 360 ​​is formed through the gap formed between the two grooves 3. The connection is made by fitting the fitting surfaces, which increases the connection area and improves the structural strength of the connection position, thereby preventing leakage at the connection position of the two tube bodies and ensuring the stability of the operation of the delivery device.

[0062] In the embodiment of the present invention, the groove tops of the two grooves 3 are respectively provided with flanges extending radially outward, and the surfaces opposite to each flange constitute fitting surfaces.

[0063] In the embodiment of the present invention, the two tube bodies are respectively long strip grooves 3, forming a straight tube water inlet pipe 360; the connecting ports are arranged along the axis of the long strip groove 3; compared with the curved tube pipeline structure, the straight tube pipeline has a lower resistance value, which can ensure that the incoming water flows smoothly in the water inlet pipe 360. At the same time, the incoming water exerts a smaller pressure on the pipe wall at each position of the water inlet pipe 360, ensuring that the joints of the two grooves 3 connected together will not leak.

[0064] In the prior art, after the first one-way valve 1 is punctured, the delivery device can only be restored to normal working condition by replacing a new water inlet pipe 360, but this makes the maintenance cost of the delivery device high, and other fully functional components arranged on the water inlet pipe 360 ​​are discarded, causing waste. The following technical solution is proposed to solve the above problem.

[0065] In the embodiment of the present invention, the two tube bodies are sealed and detachably connected; after the first one-way valve 1 is punctured, the first one-way valve 1 can be disassembled by separating the two tube bodies, and replacing the new first one-way valve 1 reduces resource waste and reduces the cost of after-sales maintenance; and the water inlet pipeline 360 ​​is a linear pipeline, and the joint between the two tube bodies is easy to seal and not prone to leakage.

[0066] In an embodiment of the present invention, a plurality of fixing holes are arranged on the flanges on both sides of the two tube bodies; screws can be passed through the corresponding fixing holes of the two tube bodies in sequence to realize a detachable connection of the flanges of the two tube bodies; a stable connection of the two tube bodies is achieved by a plurality of screws, and when the first one-way valve 1 is replaced, the two tube bodies can be separated after removing the screws, which is simple to operate and suitable for promotion.

[0067] In an embodiment of the present invention, the two grooves 3 are arc-shaped grooves, and the two tube bodies are tangentially connected to form a water inlet pipe 360 ​​with a circular cross-section. Compared with the water inlet pipe 360 ​​with a rectangular cross-section, there are no corners on the surrounding wall of the water inlet pipe 360, thereby preventing undissolved additives from remaining at the corners.

[0068] In the embodiment of the present invention, the liquid outlet ends of each liquid extraction channel 370 are respectively arranged at the bottom of the groove 3.

[0069] Through the above arrangement, the outer periphery of the liquid outlet end of each liquid extraction channel 370 is spaced a certain distance from the joint position of the two pipe bodies, so that the connection joint 302 and the groove 3 have a strong structural strength, preventing the passage between the connection joint 302 and the water inlet pipeline 360 ​​from leaking at the connection port;

[0070] In addition, the connection position of the first tube body 310 and the second tube body 320 is spaced a certain distance from the outer edge of the liquid outlet end of the first one-way valve 1, which effectively prevents the one-way valve from being damaged during pipeline cladding or bonding, reduces the failure rate of the water inlet pipeline 360, and improves production and processing efficiency.

[0071] In the embodiment of the present invention, the liquid storage cavity and the first tube body 310 are respectively located above and below the second tube body 320 ; a liquid extraction channel 370 is disposed inside the second tube body 320 .

[0072] In the embodiment of the present invention, the second tube body 320 includes an upper tube section 322 and a lower tube section 321 which are arranged vertically, and the two tube sections are buckled and spliced ​​to form a second flow channel section 372 .

[0073] In an embodiment of the present invention, the relative surfaces of the upper pipe section 322 and the lower pipe section 321 are arranged at a certain distance, and are respectively provided with guide ribs extending toward each other, and guide grooves 340 for guiding additives are respectively integrated on the upper pipe section 322 and the lower pipe section 321, and the groove tops of the guide grooves 340 of the upper pipe section 322 and the lower pipe section 321 are respectively connected to form a second flow channel section 372; each connecting joint 302 is respectively connected to the corresponding guide groove 340 of the upper pipe section 322; each connecting port opened on the profiling is respectively connected to the corresponding guide groove 340 of the lower pipe section 321.

[0074] In an embodiment of the present invention, the relative surfaces of the upper pipe section 322 and the lower pipe section 321 are arranged at a certain distance, and are respectively provided with guide ribs extending toward each other, and guide grooves 340 for guiding additives are respectively integrated on the upper pipe section 322 and the lower pipe section 321, and the groove tops of the guide grooves 340 of the upper pipe section 322 and the lower pipe section 321 are respectively connected to form a second flow channel section 372; each connecting joint 302 is respectively connected to the corresponding guide groove 340 of the upper pipe section 322; each connecting port opened on the profiling is respectively connected to the corresponding guide groove 340 of the lower pipe section 321.

[0075] Through the above-mentioned arrangement, since each second flow channel section 372 usually needs to be bent according to actual conditions to avoid other flows, the guide groove 340 is integrated through the protruding surface guide ribs, and the two relatively arranged guide grooves 340 are buckled to form a complete second flow channel section 372. Compared with arranging a plurality of recessed grooves on the surfaces of the two pipe sections, the solution of the present invention will not reduce the structural strength of each pipe section while ensuring that the liquid extraction channel 370 will not leak, and the shape of the guide ribs is more flexible, which is convenient for the production and manufacturing of each pipe section, and the processing precision requirements are low, thereby improving the processing efficiency.

[0076] In an embodiment of the present invention, sealing ribs 350 extending toward each other are respectively provided on the outer peripheries of the relative surfaces of the two pipe sections, and the extended ends of the two sealing ribs 350 are sealed and connected; by providing the sealing ribs 350, the gap between the two pipe sections is blocked, so that the appearance of the second tube body 320 is more regular, and more importantly, the sealing ribs 350 can protect the guide ribs while preventing dust from entering the gap between the two pipe sections, and prevent hard objects from contacting the guide ribs through the gap. For example, when workers install or disassemble the delivery device, the tools accidentally pierce the guide ribs, causing the liquid extraction channel 370 to fail to work normally.

[0077] In an embodiment of the present invention, each docking port is respectively arranged on the side wall of the connecting protrusion 3221, and the extending ends of each second part 3722 and the third part 3723 respectively extend along the protruding direction of the connecting protrusion 3221, and are bent toward the corresponding docking port for connection; so that the delivery component 6 is arranged on one side of the connecting protrusion 3221, reducing the space occupied by the delivery component 6 in the direction of the second part 3722 away from the corresponding surface, making the internal components of the delivery device more compact and reducing the overall volume of the delivery device.

[0078] In the embodiment of the present invention, the delivery component 6 is a pump body.

[0079] In a specific embodiment of the present invention, two liquid storage chambers are provided in the delivery device, and correspondingly, two liquid extraction channels 370 and two delivery components 6 are formed in the second tube body 320, a connecting protrusion 32213221 is provided on the upper tube section 322, and the two delivery components 6 are arranged on two opposite sides of the connecting protrusion 3221, and the extension sections of the second part 3722 and the third part 3723 of the two liquid extraction channels 370 respectively extend along the protruding direction of the connecting protrusion 3221 and are connected with the inlet and outlet of the corresponding delivery component 6; the two delivery pumps are respectively installed on the same connecting protrusion 3221, which reduces the complexity of the second tube body 320 while ensuring that each liquid extraction channel 370 can operate normally.

[0080] In the embodiment of the present invention, a positioning column with a convex surface is provided on the surface of the lower tube section 321 close to the upper tube section 322, and the upper tube section 322 is provided with positioning holes or positioning grooves at corresponding positions, and each positioning column is respectively inserted into the corresponding positioning hole or positioning groove.

[0081] In an embodiment of the present invention, at least one liquid collecting tank opening upward is provided inside the shell, and a liquid storage cavity for containing additives is provided inside. Liquid extraction channels 370 corresponding to each liquid collecting tank are provided inside the water inlet pipeline 360, and the liquid outlets of each liquid collecting tank are respectively connected to the liquid inlet ends of the liquid extraction channels 370.

[0082] In an embodiment of the present invention, an installation cavity is provided inside the shell, and at least one liquid storage box is provided in the installation cavity for being removable and placed. A liquid storage cavity for accommodating additives is provided inside the liquid storage box, and a liquid extraction channel 370 corresponding to each liquid storage box is provided inside the water inlet pipeline 360. The liquid outlet of each liquid storage box is respectively pluggable and connected to the connecting joint 302, and is connected to the liquid inlet end of the corresponding liquid extraction channel 370.

[0083] In an embodiment of the present invention, the two ends of the water inlet pipe 360 ​​are respectively connected to the water supply connector 4 and the water outlet connector 5; the inner surfaces at the two ends of each groove 3 are respectively provided with a recessed structure recessed inward, and the width of each recessed structure is greater than the groove width of the groove 3; the two opposite recessed structures are buckled to form the plug-in section of the water inlet pipe 360, and the water supply connector 4 and the water outlet connector 5 are respectively sealed and plugged in the plug-in section; a larger opening is formed by providing a further recessed structure, which facilitates the plug-in installation of the water supply connector 4 and the water outlet connector 5.

[0084] In an embodiment of the present invention, a water supply pipeline is formed inside the water supply connector 4 for introducing external water into the water inlet pipeline 360; a water outlet pipeline is formed inside the water outlet connector 5 for discharging the mixed liquid of water and additives in the water inlet pipeline 360; the liquid inlet end of the water supply connector 4 and / or the liquid outlet end of the water outlet connector 5 are respectively provided with bent pipe sections that are bent and extended away from the axial direction of the water inlet pipeline 360, so as to change the flow direction of the incoming water; each bent pipe section is respectively arranged at a certain distance from the corresponding liquid outlet end of the water supply connector 4 or the liquid inlet end of the water outlet connector 5.

[0085] In an embodiment of the present invention, the liquid inlet end of the water supply connector 4 is connected to a tap water network; and / or is connected to a secondary water tank for holding secondary water; it should be noted that the secondary water includes drainage from the last rinse cycle of the washing machine, and / or collected bath water and other water that can be directly reused.

[0086] In the embodiment of the present invention, the liquid outlet end of the water outlet connector 5 is connected to the water inlet pipe of the washing machine.

[0087] In an embodiment of the present invention, the placing device is an external placing device arranged outside the washing machine.

[0088] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A dosing device, internally provided with a water inlet pipe, the water inlet pipe comprising: A water inlet passage (360) for guiding the inflow of water; A liquid storage unit for storing an additive, the liquid outlet of the liquid storage unit being communicated with a liquid extraction flow passage (370), and the liquid outlet end of the liquid extraction flow passage (370) being connected to the water inlet passage (360); A first one-way valve (1) provided at the liquid outlet end of the liquid extraction flow passage (370) to make the liquid in the liquid extraction flow passage (370) conduct unidirectionally from the liquid inlet end to the liquid outlet end; It is characterized in that An insurance valve (2) is further provided in the liquid extraction flow passage (370), the insurance valve (2) is provided upstream of the first one-way valve (1) and downstream of the liquid outlet of the liquid storage unit to prevent the backflowing liquid from flowing into the liquid storage unit.

2. A dosing device according to claim 1, It is characterized in that The liquid extraction flow passage (370) successively comprises from upstream to downstream: a first flow passage section (371), a second flow passage section (372) and a third flow passage section (373), the first flow passage section (371) and the third flow passage section (373) are respectively arranged vertically, and the second flow passage section (372) extends in the horizontal direction; The insurance valve (2) and the first one-way valve (1) are respectively provided in the vertical first flow passage section (371) and the third flow passage section (373).

3. A dosing device according to claim 2, It is characterized in that An opening is formed in the top wall of the horizontal second flow passage section (372), and the opening is communicated with the lower end of the vertical first flow passage section (371); The insurance valve (2) is provided at the lower end of the vertical first flow passage section (371).

4. A dosing device according to claim 3, It is characterized in that Buffer cavities are respectively provided at the liquid inlet end and the liquid outlet end of the second flow passage section (372), the liquid outlet end of the first flow passage section (371) and the liquid inlet end of the third flow passage section (373) are respectively connected to the top wall or the bottom wall of the corresponding buffer area (374), and the passing areas of each buffer area (374) are respectively larger than the passing area of the middle part of the second flow passage section (372).

5. A dosing device according to claim 3, It is characterized in that A protruding support protrusion (3725) is provided on the bottom wall of the horizontal second flow passage section (372), the support protrusion (3725) is located below the insurance valve (2), and the top end of the support protrusion (3725) abuts against the insurance valve (2).

6. A dosing device according to any one of claims 2-5, It is characterized in that The second flow passage section (372) comprises a first part (3721) and a fourth part (3724) extending horizontally, which are respectively connected to the first flow passage section (371) and the third flow passage section (373); a second part (3722) extending in a vertically bent manner is also connected in series between the first part (3721) and the fourth part (3724).

7. A dosing device according to claim 6, It is characterized in that The first part (3721) and the fourth part (3724) are located on the same horizontal plane. The liquid outlet end of the first part (3721) and the liquid inlet end of the fourth part (3724) are respectively connected to the vertically arranged second part (3722) and the third part (3723). The liquid outlet end of the third part (3723) is connected to the fourth part (3724).

8. A delivery device according to claim 7, It is characterized in that It also includes a delivery component (6) connected in series to the liquid extraction channel (370) for providing power to the additive in the liquid extraction channel (370); the delivery component (6) is connected in series between the vertically extending second part (3722) and the third part (3723).

9. A delivery device according to claim 8, It is characterized in that The delivery assembly (6) is arranged outside the water inlet pipe, and a connecting protrusion (3221) protruding upward is arranged on the top of the water inlet pipe, and the delivery assembly (6) is installed on the connecting protrusion (3221); the second part (3722) and the third part (3723) are integrated in the connecting protrusion (3221) and are respectively connected to the inlet and outlet of the delivery assembly (6).

10. A delivery device according to claim 1, It is characterized in that A first tube body (310) and a second tube body (320) are arranged in the delivery device, and the two tube bodies are snap-fitted and spliced ​​to form a water inlet pipeline (360); at least one of the two tube bodies is provided with a liquid extraction channel (370), and the liquid extraction channel (370) connects the liquid storage unit and the water inlet pipeline (360).

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