Detergent dispensing device and washing machine

Abstract

The present invention provides a detergent dispensing device and a washing machine, the detergent dispensing device comprises a dispensing chamber, a chamber assembly is arranged in the dispensing chamber, the chamber assembly is connected with a constant volume chamber through a liquid suction pipe, the chamber assembly comprises at least two chambers, and dispensing liquid can be placed in each chamber, a switching valve is arranged on the liquid suction pipe, the constant volume chamber is connected with a water inlet valve through two venturi tube structures, the negative pressure tubes of the two venturi tube structures are connected with the constant volume chamber, a one-way valve and / or a float valve are arranged in the two negative pressure tubes and the liquid suction pipe, and the dispensing liquid flows into the constant volume chamber or the dispensing liquid in the constant volume chamber is dispensed into the dispensing chamber by changing the water inlet state of the two venturi tubes. The present invention forms a double venturi negative pressure multi-dispensing automatic dispensing assembly by arranging two venturi tube structures, which has a reasonable structure and precise control, greatly simplifies the control structure of automatic detergent dispensing, and reduces production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a detergent dispensing device and a washing machine. Background Art

[0002] At present, all washing machine manufacturers have launched washing machines with automatic dispensing functions. This type of washing machine can realize the intelligent addition of detergent, avoiding users from adding detergent manually, which is more convenient and has a good user experience. With the advancement of science and technology and the improvement of washing machine functions, users have higher and higher requirements for automatic detergent dispensing technology for washing machines. The detergent dispensing device in the related technology generally adopts piston pumps, centrifugal pumps, peristaltic pumps and solenoid valves to directly dispense detergent into the water tub, but the detergent and water mixed in this way are poor, which not only affects the washing performance, but also damages the clothes due to direct contact between the detergent and the clothes. In addition, the structure of this type of detergent dispensing device is complex and the cost is relatively high.

[0003] Currently, various detergent dispensing devices generally consist of three parts: a detergent storage box, a water inlet box, and a dispensing device. The detergent stored in the detergent storage box is dispensed into the water inlet box through the dispensing device and flows into the washing tub for washing the user's clothes. This device is relatively complex, high in cost, complex in assembly, and has high requirements for process and component precision. Summary of the invention

[0004] In view of this, the present invention now provides a detergent dispensing device and a washing machine, which form a double-Venturi negative pressure multi-dispensing automatic dispensing component by setting two Venturi tube structures, simplifying the dispensing structure, reducing the coordination of parts, and improving the reliability and stability of parts.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A detergent dispensing device comprises a dispensing cavity, wherein a chamber assembly is arranged in the dispensing cavity, the chamber assembly is connected with a constant volume cavity through a liquid suction pipe, the chamber assembly comprises at least two chambers, and dispensing liquid can be placed in each chamber, a reversing valve is arranged on the liquid suction pipe, the reversing valve is connected with the chamber in the chamber assembly through a liquid suction pipeline, the constant volume cavity is connected with a water inlet valve through two venturi tube structures, negative pressure tubes of the two venturi tube structures are connected with the constant volume cavity, one-way valves and / or float valves are arranged in the two negative pressure tubes and the liquid suction pipe, and by changing the water inlet state of the two venturi tubes, the dispensing liquid flows into the constant volume cavity or the dispensing liquid in the constant volume cavity is dispensed into the dispensing cavity.

[0007] The present invention forms a double-Venturi negative pressure multi-dispensing automatic dispensing component by arranging two Venturi tube structures, and completes the absorption and dispensing of the dispensing liquid in the form of double negative pressure. It has a reasonable structure and precise control, which greatly simplifies the control structure of automatic detergent dispensing and reduces production costs.

[0008] Furthermore, the reversing valve is an integrated multi-way valve, or the reversing valve is a conversion valve in which a plurality of connecting valves are connected in series or in parallel to realize the extraction of various injection liquids.

[0009] This configuration further improves the applicability of the present invention.

[0010] Furthermore, the reversing valve is connected to different chambers of the chamber assembly through separate liquid suction pipelines.

[0011] Furthermore, the chamber assembly includes a first chamber and a third chamber, the suction pipe includes two pipelines extending into the first chamber and the third chamber respectively, namely a first suction pipeline and a second suction pipeline, and the reversing valve is arranged at the connecting point between the first suction pipeline and the second suction pipeline.

[0012] This arrangement ensures that two different liquids (such as softener and softener) are sucked into the constant volume chamber respectively through the reversing valve, thereby ensuring the reliability of multiple injections.

[0013] Furthermore, the two Venturi tube structures are respectively a first Venturi tube structure and a second Venturi tube structure. The first Venturi tube structure is connected to the constant volume chamber through a first negative pressure tube, and the second Venturi tube structure is connected to the constant volume chamber through a second negative pressure tube. The first Venturi tube structure is connected to the water inlet valve through a first water inlet pipe port, and the second Venturi tube structure is connected to the water inlet valve through a second water inlet pipe port. The water inlet valve can let water into the second water inlet pipe port and the first water inlet pipe port separately and / or simultaneously.

[0014] This arrangement provides a method of connecting two venturi tube structures with a constant volume chamber and a water inlet valve, and by controlling the water inlet valve to feed water into the venturi tube separately or simultaneously, the absorption or discharge of the liquid placed in the constant volume chamber is achieved.

[0015] Furthermore, the constant volume chamber is connected to a constant volume chamber cleaning device, and the constant volume chamber cleaning device is used to clean the constant volume chamber when the liquid in the constant volume chamber is discharged.

[0016] By providing a constant volume cavity cleaning device, the constant volume cavity can be flushed in time to avoid inaccurate volume determination of the constant volume cavity or influence on the suction or discharge of the liquid put into the constant volume cavity.

[0017] Furthermore, the constant volume chamber cleaning device includes an overflow box, and / or a first connecting pipe, and / or a second connecting pipe; wherein the overflow box is connected to the first venturi tube structure, and the first venturi tube structure is connected to the constant volume chamber; one end of the first connecting pipe is connected to the water outlet end of the second venturi tube structure, and the other end of the first connecting pipe is connected to the constant volume chamber; one end of the second connecting pipe is connected to the water inlet end of the second venturi tube structure, and the other end of the second connecting pipe is connected to the constant volume chamber.

[0018] This arrangement ensures that when the second venturi tube structure starts to work, the liquid in the constant volume chamber begins to be discharged, and water can be introduced into the constant volume chamber for flushing through the overflow box, and / or the first connecting pipe, and / or the second connecting pipe, and some water is introduced into the constant volume chamber again, and then enters the second venturi tube structure from the second negative pressure pipe port for discharge. When the water intake of the second venturi tube structure is stopped, a siphon effect is generated due to the long drainage pipe, and finally all the liquid in the constant volume chamber is discharged, so as to prepare for the next work and ensure the reliability of flushing.

[0019] Furthermore, the diameter of the first connecting pipe is smaller than the diameter of the water outlet end of the second venturi tube structure; the diameter of the second connecting pipe is smaller than the diameter of the water inlet end of the second venturi tube structure.

[0020] This arrangement ensures that when the second venturi tube structure is in the water-intake state, the main water flow still flows to the delivery chamber through the long drainage pipe, ensuring the normal operation of the second venturi tube structure to suck out the delivery liquid in the fixed volume chamber. At the same time, by providing a first connecting pipe and / or a second connecting pipe with a smaller diameter, part of the water flow of the second venturi tube structure can flow to the fixed volume chamber when water is inletted, so as to clean the fixed volume chamber and ensure the reliability of the dual venturi negative pressure multi-injection automatic delivery operation and the reliability of the fixed volume chamber flushing.

[0021] Furthermore, micro one-way valves are provided in the middle of the first connecting pipe and the second connecting pipe.

[0022] This arrangement prevents water in the first connecting pipe and the second connecting pipe from flowing back, and at the same time, closes the channel in time after the water inflow is completed, so that the long drainage pipe can produce a siphon function.

[0023] Compared with the prior art, the detergent dispensing device and washing machine described in the present invention have the following advantages: by setting two Venturi tube structures, a double Venturi negative pressure multi-dispensing automatic dispensing component is formed, and the absorption and dispensing of the dispensing liquid are completed in the form of double negative pressure, which simplifies the dispensing structure, reduces the coordination of parts, improves the reliability and stability of parts, and reduces production costs.

[0024] Another object of the present invention is to provide a washing machine comprising the detergent dispensing device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention 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 and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the detergent dispensing device according to an embodiment of the present invention;

[0027] Figure 2 This is a water inlet state diagram of the first water inlet pipe in the detergent dispensing device according to an embodiment of the present invention;

[0028] Figure 3 This is a diagram showing the water inlet state of the second water inlet pipe in the detergent dispensing device according to an embodiment of the present invention;

[0029] Figure 4 A reference diagram of the first relative position setting of the overflow box in the detergent dispensing device according to the embodiment of the present invention when water flows into the constant volume chamber;

[0030] Figure 5 A reference diagram for the second relative position setting of the overflow box in the detergent dispensing device according to an embodiment of the present invention when water flows into the constant volume chamber;

[0031] Figure 6 A schematic side view of another detergent dispensing device according to an embodiment of the present invention;

[0032] Figure 7 A schematic side view of the structure of the detergent dispensing device according to an embodiment of the present invention;

[0033] Figure 8 A schematic diagram of the structure of the detergent dispensing device according to an embodiment of the present invention without the top cover plate;

[0034] Fig. 9 for Figure 8 A schematic diagram of the structure from above;

[0035] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of AA;

[0036] Fig.11 for Fig. 9 Schematic diagram of the cross-sectional structure of the middle BB;

[0037] Fig.12 for Figure 8 The side view of the middle structure after removing the drawer box base;

[0038] Description of reference numerals:

[0039] 1. First venturi tube structure; 2. First negative pressure tube; 3. Float valve; 4. Constant volume chamber; 5. Suction check valve; 6. Suction tube; 7. Discharge check valve; 8. Second negative pressure tube; 9. Second water inlet; 10. Second venturi tube structure; 11. Second water outlet; 12. Long drainage pipe; 13. Delivery chamber; 14. First chamber; 15. Main drainage pipe; 16. Second chamber; 17. Leakage port; 18. Overflow box; 19. Overflow pipe; 20. First water outlet; 21. First water inlet; 22. Water inlet valve; 23. Top cover; 24. Shell; 25. Front plate; 26. Handle; 27. Detergent cover; 28. Drawer box cover; 29. ​​Drawer box base; 30. Reversing valve; 31. First liquid suction pipeline; 32. Second liquid suction pipeline; 33. Third chamber; 34. First connecting pipe; 35. Second connecting pipe; 36. Miniature one-way valve. DETAILED DESCRIPTION

[0040] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0041] It should be noted that all the terms used in the present invention for directional and positional indications, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0042] In the description of the present invention, 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] Embodiment 1, as Figures 1 to 5 As shown, the present invention discloses a detergent dispensing device, including a dispensing cavity 13, in which a first chamber 14 is arranged, in which dispensing liquid is stored, and the first chamber 14 is connected with a constant volume cavity 4 through a liquid suction pipe 6, and the constant volume cavity 4 is connected with a water inlet valve 22 through two venturi tube structures, and the negative pressure pipes of the two venturi tube structures are connected with the constant volume cavity 4, and a one-way valve and / or a float valve are arranged in the two negative pressure pipes and the liquid suction pipe 6, and by changing the water inlet state of the two venturi tubes, the dispensing liquid flows into the constant volume cavity 4 or the dispensing liquid in the constant volume cavity 4 is dispensed into the dispensing cavity 13.

[0045] As an example of the present invention, the delivery cavity 13 can be a drawer box cavity or a cavity integrated on the washing machine. The two Venturi tube structures are respectively a first Venturi tube structure 1 and a second Venturi tube structure 10. The first Venturi tube structure 1 is connected to the constant volume cavity 4 through a first negative pressure tube 2, and the second Venturi tube structure 10 is connected to the constant volume cavity 4 through a second negative pressure tube 8. The first Venturi tube structure 1 is connected to the water inlet valve 22 through a first water inlet pipe port 21, and the second Venturi tube structure 10 is connected to the water inlet valve 22 through a second water inlet pipe port 9. The water inlet valve 22 can supply water to the second water inlet pipe port 9 and the first water inlet pipe port 21 separately and / or simultaneously.

[0046] The structure works as follows:

[0047] Water enters the first water inlet 21 and enters the first venturi tube structure 1. The first negative pressure tube 2 generates negative pressure, the float valve 3 in the first negative pressure tube 2 opens, the discharge check valve 7 in the second negative pressure tube 8 closes, and the suction check valve 5 in the suction tube 6 opens, and the liquid to be put in is sucked from the first chamber 14 and enters the constant volume chamber 4. When the fixed volume chamber 4 is filled with the put in liquid, or the fixed volume chamber 4 absorbs a fixed amount of put in liquid, the float valve in the suction tube 6 is closed. At this time, the first water inlet 21 continues to take in water, but only water, and the put in liquid no longer enters the constant volume chamber 4.

[0048] Close the water inlet of the first water inlet pipe 21, open the second water inlet pipe 9 to let in water, the second venturi tube structure 10 starts to work, the discharge one-way valve 7 in the second negative pressure tube 8 is opened, and the suction one-way valve 5 in the suction pipe 6 is closed, and the delivery liquid in the constant volume chamber 4 is sucked into the second venturi tube structure 10, and then enters the delivery chamber 13 with the water inlet from the second water inlet pipe 9.

[0049] The present invention forms a double-Venturi negative pressure automatic delivery component by arranging two Venturi tube structures, and completes the absorption and delivery of delivery liquid in the form of double negative pressure. It has a reasonable structure and precise control, which greatly simplifies the control structure of automatic detergent delivery and reduces production costs.

[0050] Preferably, as a preferred example of the present invention, the density of the float in the float valve 3 is less than the density of the liquid placed in the constant volume chamber 4, and the density of the float in the liquid suction check valve 5 is greater than the density of the liquid placed in the constant volume chamber 4. This setting ensures the reliability of the double venturi negative pressure tube in extracting the liquid when a negative pressure is formed in the constant volume chamber, and the relative setting of the float density and the density of the liquid placed can achieve the fixed volume of the liquid placed, which is accurate and reliable.

[0051] During operation, water enters the first water inlet pipe 21 and enters the first venturi tube structure 1. The first negative pressure pipe 2 generates negative pressure, and negative pressure is also generated in the constant volume chamber 4 connected thereto. The float of the liquid suction one-way valve 5 becomes loose, and the liquid suction one-way valve 5 is in an open state. The liquid suction pipe 6 sucks the liquid in the first chamber 14 into the constant volume chamber 4 through the liquid suction one-way valve 5. As the liquid in the constant volume chamber 4 is sucked, the liquid can float the float in the float valve 3. When the capacity in the constant volume chamber 4 reaches the preset capacity, for example, after a period of time T, the time T is a preset time range, such as 3s to 20s, which is set as needed, the float in the float valve 3 closes the float valve 3.

[0052] Then, the first water inlet pipe 21 is closed, and the second water inlet pipe 9 starts to let in water. The second negative pressure pipe 8 in the second venturi tube structure 10 generates negative pressure. At this time, the float in the discharge one-way valve 7 will become loose to a certain extent, and the detergent in the constant volume chamber 4 will flow to the delivery chamber 13 through the discharge one-way valve 7.

[0053] Preferably, the density of the float in the discharge check valve 7 is greater than the density of the liquid put into the constant volume chamber. This arrangement enables the discharge check valve to close the second negative pressure tube when the second negative pressure tube does not generate negative pressure, further ensuring the accuracy of the liquid drawn into the constant volume chamber.

[0054] Preferably, as a preferred example of the present invention, a second chamber 16 is provided in the delivery cavity 13 , the second chamber 16 is used for delivering washing powder, and a water leakage port 17 is provided at the bottom of the second chamber 16 .

[0055] This arrangement enables the detergent dispensing device of the present invention to automatically dispense washing liquid and washing powder, thus meeting the multifunctional requirements of the detergent dispensing device.

[0056] Preferably, as a preferred example of the present invention, the first venturi tube structure 1 is also connected to an overflow box 18. After water enters the first water inlet pipe 21, it flows to the overflow box 18 through the first water outlet 20. An overflow pipe 19 is arranged on the overflow box 18. The overflow pipe 19 is arranged near the upper part of the overflow box 18 to make excess water in the overflow box 18 flow to the washing bucket or the second chamber 16 or the delivery cavity 13.

[0057] When the second venturi tube structure 10 is working, since the overflow pipe 19 is open, when negative pressure is generated in the constant volume chamber 4, the pressure required to make the water in the overflow box 18 flow to the constant volume chamber 4 is less than the pressure required to make the injected liquid flow to the constant volume chamber 4 through the suction tube 6. Therefore, when the second venturi tube structure 10 is working, the second negative pressure tube 8 generates negative pressure, and the injected liquid flows from the constant volume chamber 4 into the injection chamber 13, and the constant volume chamber 4 generates negative pressure. The water in the overflow box 18 flows back into the first negative pressure tube 2 from the first water outlet 20, and then flows to the constant volume chamber 4 to flush the constant volume chamber.

[0058] Preferably, as a preferred example of the present invention, the second water outlet 11 of the second venturi tube structure 10 is connected to the delivery chamber 13 through a long drainage pipe 12 .

[0059] This arrangement allows the liquid added into the constant volume chamber or the flushing liquid flowing into the constant volume chamber 4 from the overflow box 18 to produce a siphon effect through the second venturi tube structure 10 and the long drain pipe 12, even when the water inlet is stopped, thereby emptying the constant volume chamber 4.

[0060] Preferably, as a preferred example of the present invention, the water inlet of the overflow pipe 19 on the overflow box 18 is not higher than the first water outlet 20 of the overflow box 18, or the height of the first water outlet 20 on the overflow box 18 is higher than the liquid level of the liquid contained in the constant volume chamber 4.

[0061] This arrangement further ensures that the overflow box 18 can store water when the first venturi tube structure 1 is working, and releases water into the constant volume chamber 4 when the liquid in the constant volume chamber 4 is added, thereby ensuring the reliability of the overflow box 18 storing water and flushing the constant volume chamber 4.

[0062] Preferably, as a preferred example of the present invention, a main drainage pipe opening 15 is provided at the bottom of the delivery cavity 13 to facilitate the delivery liquid or water in the delivery cavity 13 to flow to the washing bucket.

[0063] Preferably, as a preferred example of the present invention, the washing liquid stored in the first chamber 14 is any one of liquid detergents such as detergent, softener, cleaning agent, bleach, disinfectant, etc.

[0064] Embodiment 2, as Figure 6 As shown, the present invention discloses another detergent dispensing device, including a dispensing chamber 13, in which a chamber assembly is arranged, the chamber assembly is connected to the constant volume chamber 4 through a suction pipe 6, the chamber assembly includes at least two chambers, and dispensing liquid can be placed in each chamber, a reversing valve 30 is arranged on the suction pipe 6, and the reversing valve 30 is connected to the chamber in the chamber assembly through a suction pipeline, the constant volume chamber 4 is connected to the water inlet valve 22 through two venturi tube structures, and the negative pressure tubes of the two venturi tube structures are connected to the constant volume chamber 4, and a one-way valve and / or a float valve are arranged in the two negative pressure tubes and the suction pipe 6, and by changing the water inlet state of the two venturi tubes, the dispensing liquid flows to the constant volume chamber 4 or the dispensing liquid in the constant volume chamber 4 is dispensed to the dispensing chamber 13, and other structures are the same as those in Example 1.

[0065] This embodiment discloses a dual-negative-pressure multi-injection automatic detergent dispensing device, which completes the absorption and dispensing of dispensing liquid in the form of dual negative pressure by setting two Venturi tube structures, and by setting a chamber assembly including at least two chambers, the reversing valve 30 on the liquid suction tube 6 is adjusted according to the dispensing needs, so that different dispensing liquids can be absorbed. The structure is reasonable and the control is precise, which greatly simplifies the control structure of automatic detergent dispensing and reduces the production cost.

[0066] Preferably, as a preferred example of the present invention, the reversing valve 30 can be a three-way valve, a four-way valve or any multi-way valve, and can also be connected in series or in parallel through multiple connecting valves to realize the extraction of multiple injection liquids.

[0067] This configuration further improves the applicability of the present invention.

[0068] Preferably, as a preferred example of the present invention, the reversing valve 30 is connected to different chambers of the chamber assembly through separate suction lines. As an example of the present invention, the chamber assembly includes a first chamber 14 and a third chamber 33, and the suction pipe 6 includes two pipes extending into the first chamber 14 and the third chamber 33, respectively, which are a first suction line 31 and a second suction line 32, and the reversing valve 30 is arranged at the connection between the first suction line 31 and the second suction line 32, so as to achieve the purpose of sucking two different liquids (such as softener and softener) into the constant volume chamber 4 respectively.

[0069] Preferably, as a preferred example of the present invention, the constant volume chamber 4 is connected to a constant volume chamber cleaning device, and the constant volume chamber cleaning device is used to clean the constant volume chamber 4 when the liquid in the constant volume chamber 4 is discharged. As an example of the present invention, the constant volume chamber cleaning device includes an overflow box 18, the setting structure of the overflow box 18 is the same as the structure in Example 1, and / or, a first connecting pipe 34 led out from the water outlet end of the second venturi tube structure 10, the other end of the first connecting pipe 34 is connected to the constant volume chamber 4, and / or, a second connecting pipe 35 led out from the water inlet end of the second venturi tube structure 10, the other end of the second connecting pipe 35 is connected to the constant volume chamber 4.

[0070] The first connecting pipe 34 and / or the second connecting pipe 35 and / or the overflow box 18 are provided, and the main function is to fully clean the constant volume chamber 4. When the second water inlet pipe port of the second venturi tube structure 10 starts to take in water, the venturi tube generates negative pressure to absorb the liquid previously sucked into the constant volume chamber 4, such as detergent or softener. At the same time, the first connecting pipe 34 and / or the second connecting pipe 35 and / or the overflow box 18 introduce part of the water to enter the constant volume chamber 4 again, and then enter the second venturi tube structure 10 from the second negative pressure pipe port to be discharged. When the water inlet of the second venturi tube structure is stopped, a siphon effect is generated due to the long drainage pipe 12, and finally all the liquid in the constant volume chamber is discharged to prepare for the next work.

[0071] Preferably, as a preferred example of the present invention, the diameter of the first connecting pipe 34 is smaller than the diameter of the water outlet end of the second venturi tube structure 10; the diameter of the second connecting pipe 35 is smaller than the diameter of the water inlet end of the second venturi tube structure 10.

[0072] This arrangement ensures that when the second venturi tube structure 10 is in the water-intake state, the main water flow still flows through the long drainage pipe 12 to the delivery chamber 13, ensuring the normal operation of the second venturi tube structure 10 to suck out the delivery liquid in the constant volume chamber 4. At the same time, by providing a first connecting pipe 34 and / or a second connecting pipe 35 with a smaller diameter, part of the water flow of the second venturi tube structure 10 can flow to the constant volume chamber 4 when water is inletted, thereby completing the cleaning of the constant volume chamber 4.

[0073] Preferably, as a preferred example of the present invention, a micro one-way valve 36 is provided between the first connecting pipe 34 and the second connecting pipe 35. When it works, it prevents water from flowing back, and at the same time, after the water inflow is completed, the channel is closed in time, so that the long drainage pipe 12 can produce a siphon function.

[0074] As an example of the present invention, the water inlet passage for cleaning the constant volume chamber 4 may be the overflow box 18 , the first connecting pipe 34 , or the second connecting pipe 35 .

[0075] Since the constant volume chamber 4 is provided for the purpose of constant volume volume of the detergent, the viscosity of the liquid is generally high. If the detergent in the constant volume chamber 4 is not rinsed clean each time, part of the liquid will adhere to the constant volume chamber 4 or the walls of the first venturi tube structure 1, the second venturi tube structure 10, and the pipette 6, resulting in inaccurate constant volume accuracy. In severe cases, part of the liquid will block the connecting ports of the first venturi tube structure 1, the second venturi tube structure 10, and the pipette 6, affecting the liquid to enter or flow out of the constant volume chamber 4.

[0076] Therefore, the present application provides an overflow box 18 connected to the constant volume chamber 4, and / or a first connecting pipe 34, and / or a second connecting pipe 35.

[0077] Preferably, the volume of water entering the constant volume chamber 4 through the first connecting tube 34 and / or the second connecting tube 35 and / or the overflow box 18 is less than or equal to the water flow drawn out of the constant volume chamber 4 through the second negative pressure tube 8 by the second venturi tube structure 10, so that when flushing the constant volume chamber, the flushing liquid level in the constant volume chamber 4 will not be higher than the upper end of the suction tube 6.

[0078] Alternatively, when the volume of water entering the constant volume chamber 4 through the first connecting pipe 34 and / or the second connecting pipe 35 and / or the overflow box 18 is greater than the water flow extracted from the constant volume chamber 4 through the second negative pressure pipe 8 by the second venturi tube structure 10, at this time, the constant volume chamber 4 will be filled with flushing water. Since the density of the float of the liquid suction one-way valve 5 is greater than the density of the liquid put into the constant volume chamber, the liquid suction one-way valve 5 in the liquid suction pipe 6 is blocked, and the flushing water in the constant volume chamber 4 will not enter the first chamber 14. When flushing the constant volume chamber 4, the first inlet of the first venturi tube structure 1 The water pipe port 21 stops taking in water, while the second water inlet pipe port 9 in the second venturi tube structure 10 continues taking in water, and negative pressure continues to be generated in the second negative pressure pipe 8. At this time, the float in the float valve 3 is lifted up to close the float valve 3, and the flushing water in the constant volume chamber 4 can only flow to the delivery chamber 13 through the discharge one-way valve 7, the second negative pressure pipe 8, and the long drain pipe 12, and then flow to the washing bucket. At this time, a siphon structure is formed among the discharge one-way valve 7, the second negative pressure pipe 8, and the long drain pipe 12, which can extract all the flushing water in the constant volume chamber 4 to ensure the flushing effect of the constant volume chamber 4.

[0079] Embodiment 3, as Figures 1 to 12 As shown, the present invention discloses a detergent dispensing device, including a drawer box base 29 and a drawer box cover 28, a dispensing cavity 13 is formed between the drawer box base 29 and the drawer box cover 28, a detergent cover 27 and a top cover 23 are sequentially arranged above the drawer box cover 28, the fixed volume cavity 4 is formed between the top cover 23 and the detergent cover 27, and other structures are the same as those in Example 1.

[0080] Preferably, a front plate 25 is provided at the front end of the drawer box base 29 , and a handle 26 is provided on the front plate 25 .

[0081] This arrangement allows the drawer box assembly to be quickly and conveniently opened or pushed in as needed during use.

[0082] Preferably, a shell 24 is provided on the outer side of the drawer box base 29 , and the shell 24 covers the periphery of the drawer box base 29 and is snap-connected with the detergent cover plate 27 .

[0083] This arrangement avoids deformation of the drawer assembly due to external force during use, thereby improving the reliability of the drawer box assembly during use.

[0084] Preferably, the top cover plate 23 is detachably connected to the detergent cover plate 27 and / or the drawer box cover plate 28 and / or the housing 24. As an example of the present invention, the top cover plate 23 is connected to the detergent cover plate 27 by screws.

[0085] Embodiment 4, the present invention further discloses a washing machine, comprising a detergent dispensing device as described in Embodiment 1 or Embodiment 2 or Embodiment 3.

[0086] The washing machine can dispense the liquid in the first chamber 14 multiple times as needed through a control program.

[0087] Preferably, the detergent dispensing device may be an independent external dispensing device, or may be a dispensing device integrated on the washing machine, wherein the dispensing device, the main water inlet valve and the water inlet box on the washing machine form a highly integrated dispensing device.

[0088] Preferably, the detergent dispensing device shares the main water inlet solenoid valve of the washing machine, namely the water inlet valve 22. The solenoid valve may have a corresponding number of control conversion ports according to the type of liquid to be dispensed, so as to control the dispensing of different washing products.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A detergent dispensing device, characterized in that: The invention comprises a delivery chamber (13), wherein a chamber assembly is arranged in the delivery chamber (13), wherein the chamber assembly is connected to a constant volume chamber (4) via a liquid suction pipe (6), wherein the chamber assembly comprises at least two chambers, wherein delivery liquid can be placed in each chamber, wherein a reversing valve (30) is arranged on the liquid suction pipe (6), wherein the reversing valve (30) is connected to a chamber in the chamber assembly via a liquid suction pipeline, wherein the constant volume chamber (4) is connected to a water inlet valve (22) via two venturi tube structures, wherein negative pressure pipes of the two venturi tube structures are connected to the constant volume chamber (4), wherein check valves and / or float valves are arranged in the two negative pressure pipes and the liquid suction pipe (6), and wherein the delivery liquid flows into the constant volume chamber (4) or the delivery liquid in the constant volume chamber (4) is delivered into the delivery chamber (13) by changing the water inlet state of the two venturi tubes; The reversing valve (30) is an integrated multi-way valve, or the reversing valve (30) is a conversion valve in which a plurality of connecting valves are connected in series or in parallel to realize the extraction of a plurality of injection liquids; The reversing valve (30) is connected to different chambers of the chamber assembly through separate liquid suction pipelines; The chamber assembly comprises a first chamber (14) and a third chamber (33); the liquid suction pipe (6) comprises two pipelines extending into the first chamber (14) and the third chamber (33), respectively, namely a first liquid suction pipeline (31) and a second liquid suction pipeline (32); the reversing valve (30) is arranged at the connection point between the first liquid suction pipeline (31) and the second liquid suction pipeline (32); The two venturi tube structures are respectively a first venturi tube structure (1) and a second venturi tube structure (10); the first venturi tube structure (1) is connected to the constant volume chamber (4) via a first negative pressure pipe (2); the second venturi tube structure (10) is connected to the constant volume chamber (4) via a second negative pressure pipe (8); the first venturi tube structure (1) is connected to a water inlet valve (22) via a first water inlet pipe opening (21); the second venturi tube structure (10) is connected to the water inlet valve (22) via a second water inlet pipe opening (9); the water inlet valve (22) is capable of letting water in separately and / or simultaneously to the second water inlet pipe opening (9) and the first water inlet pipe opening (21); The fixed volume chamber (4) is connected to a fixed volume chamber cleaning device, and the fixed volume chamber cleaning device is used to clean the fixed volume chamber (4) when the liquid in the fixed volume chamber (4) is discharged; The constant volume chamber cleaning device comprises an overflow box (18), and / or a first connecting pipe (34), and / or a second connecting pipe (35); wherein the overflow box (18) is connected to the first venturi tube structure (1), and the first venturi tube structure (1) is connected to the constant volume chamber (4); one end of the first connecting pipe (34) is connected to the water outlet end of the second venturi tube structure (10), and the other end of the first connecting pipe (34) is connected to the constant volume chamber (4); one end of the second connecting pipe (35) is connected to the water inlet end of the second venturi tube structure (10), and the other end of the second connecting pipe (35) is connected to the constant volume chamber (4).

2. The detergent dispensing device according to claim 1, characterized in that: The diameter of the first connecting pipe (34) is smaller than the diameter of the water outlet end of the second venturi tube structure (10); and the diameter of the second connecting pipe (35) is smaller than the diameter of the water inlet end of the second venturi tube structure (10).

3. The detergent dispensing device according to claim 1 or 2, characterized in that: A micro one-way valve (36) is provided in the middle of the first connecting pipe (34) and the second connecting pipe (35).

4. A washing machine, characterized in that: It comprises a detergent dispensing device as described in any one of claims 1 to 3.

Images