Detergent putting device and washing machine

Abstract

The utility model provides a detergent putting device and a washing machine, and the detergent putting device comprises a detergent accommodating cavity which is used for storing a detergent; the negative pressure pump is used for sucking the detergent in the detergent accommodating cavity in a negative pressure manner; and the water inlet valve is used for controlling water inlet, and the inlet water is mixed with the detergent sucked out by the negative pressure pump and then put in. According to the detergent feeding device, suction and feeding of detergent are achieved through the negative pressure pump, compared with a peristaltic pump or a double-negative-pressure suction scheme, the negative pressure pump generally has a simpler structure and is easy to manufacture and maintain, meanwhile, the negative pressure pump has high working efficiency, and the detergent feeding device is suitable for being popularized and applied. According to the washing machine, suction and feeding of the washing agent can be achieved under low power, so that energy is saved, the suction speed and the feeding amount can be accurately controlled according to needs, and the feeding accuracy and stability of the washing agent are improved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and more specifically, to a detergent dispensing device and a washing machine. Background Technology

[0002] With the advancement of technology, washing machines with automatic detergent dispensing functions have become increasingly popular due to their convenience and superior user experience, eliminating the need for manual detergent addition. Existing detergent dispensing systems typically consist of three parts: a detergent storage box, a water inlet box, and a dispensing device. Components such as piston pumps, centrifugal pumps, peristaltic pumps, and solenoid valves are used to dispense detergent from the storage box into the water inlet box, which then flows into the washing tub. This system is structurally complex, costly, and requires high precision in manufacturing processes and components. Furthermore, the mixing effect between the dispensed detergent and water is often poor, affecting washing performance and potentially damaging clothing due to direct contact between the detergent and clothes.

[0003] To address this, Chinese Patent Application No. 202322666558.0 discloses a negative pressure automatic dispensing water box and a washing machine. The negative pressure automatic dispensing water box includes: a detergent storage chamber, a volumetric cavity, a venturi tube device, a long drain pipe, and a water inlet device. The venturi tube device, under the action of the water inlet device, draws detergent from the detergent storage chamber into the volumetric cavity or discharges detergent from the volumetric cavity. This solution employs a single negative pressure detergent extraction structure combined with a one-way valve on the long drain pipe to achieve detergent extraction and dispensing. It features a simple structure, reliable operation, and low cost.

[0004] However, the above solutions rely on improving the accuracy of the dispensing device to control the detergent dosage. However, the dispensing device is only one factor affecting the dosage; environmental factors also significantly impact the amount of detergent dispensed. For example, ambient temperature, the viscosity of different types of detergent, and the amount of water entering the system all affect the final washing and conditioning effect. In particular, detergents are usually viscous liquids, which can affect the operating conditions of the equipment during automatic dispensing, thus affecting the accuracy of the dispensing control. Utility Model Content

[0005] The present invention aims to provide a detergent dispensing device and a washing machine to address the problems of existing detergent dispensing devices, such as complex structure, high cost, poor dispensing effect, and low accuracy.

[0006] To solve the above problems, this utility model provides a detergent dispensing device, comprising:

[0007] Detergent container, used to store detergent;

[0008] A negative pressure pump draws detergent from the detergent chamber using negative pressure.

[0009] The water inlet valve is used to control the water intake, which is then mixed with the detergent pumped out by the negative pressure pump before being added.

[0010] This application discloses a detergent dispensing device; it uses a negative pressure pump to achieve detergent suction and dispensing. Compared with peristaltic pumps or dual negative pressure suction schemes, negative pressure pumps generally have a simpler structure, are easier to manufacture and maintain, and have higher working efficiency, enabling detergent suction and dispensing with lower power, thereby saving energy. Furthermore, the suction speed and dispensing amount can be precisely controlled as needed, improving the accuracy and stability of detergent dispensing. In addition, the negative pressure pump controls air pressure changes to suction detergent, and is less affected by the viscosity differences of different detergents, improving the device's compatibility with different types of detergents.

[0011] Preferably, a first check valve is installed on the connecting pipeline between the negative pressure pump and the detergent container. This arrangement prevents detergent or washing water from flowing back into the detergent container when the negative pressure pump stops operating, ensuring that the detergent can only flow towards the negative pressure pump and not flow back into the detergent container, thus avoiding detergent waste and contamination inside the detergent container, and improving the stability and reliability of the detergent dispensing device.

[0012] Preferably, the detergent dispensing device further includes a volume-regulating chamber, which is disposed between the negative pressure pump and the detergent chamber. The water inlet valve is used to control the water entering the volume-regulating chamber, and the water is mixed with the detergent pumped by the negative pressure pump in the volume-regulating chamber before being dispensed.

[0013] This invention uses a fixed-volume chamber as an intermediate container, so that the negative pressure pump only draws in air and does not directly contact the detergent. At the same time, it can also prevent backflow impact on the main chamber when the negative pressure pump or water inlet valve malfunctions. In addition, the fixed volume design of the fixed-volume chamber makes it less affected by the expansion / contraction of ambient temperature. Together with the negative pressure pump and the second solenoid valve, it can quantitatively draw detergent from the detergent chamber, achieving accurate measurement of detergent.

[0014] Preferably, the volume-fixing chamber and the detergent chamber are connected through a first connecting pipe, the negative pressure pump is connected to the volume-fixing chamber through a second connecting pipe, the volume-fixing chamber is connected to the water inlet valve through a third connecting pipe, and the volume-fixing chamber is also provided with a discharge pipe. When the negative pressure pump is working, it can draw air from the inside of the volume-fixing chamber to create a negative pressure inside, and the detergent in the detergent chamber is drawn into the volume-fixing chamber. After the drawing is completed, the water inlet valve is opened to introduce water into the volume-fixing chamber, which mixes with the detergent drawn into the volume-fixing chamber and is discharged outward through the discharge pipe.

[0015] In this application, the negative pressure pump only needs to draw in air instead of directly processing viscous detergent, reducing reliance on high-precision pumps (such as peristaltic pumps and centrifugal pumps), simplifying the mechanical structure, and reducing costs. Through the coordinated design of the first, second, and third connecting pipelines and the discharge pipeline, the step-by-step process of detergent suction, water mixing, and drainage is integrated, reducing the number of redundant parts and improving assembly efficiency. In addition, the detergent is pre-mixed with clean water in the fixed-volume chamber before being discharged, avoiding direct contact between high-concentration detergent and clothes, while improving the uniformity of detergent dispersion in water and enhancing the washing effect. The fixed-volume chamber, as an independent mixing container, is completely isolated from external pollution, preventing impurities from mixing into the detergent or mixture and ensuring washing safety.

[0016] Preferably, the first one-way valve is provided at the end of the first connecting pipe that extends into the constant volume chamber. The first one-way valve opens when the constant volume chamber is under negative pressure and closes when the constant volume chamber is under normal pressure or positive pressure.

[0017] This setup, via a first solenoid valve, completely disconnects the first connecting pipe from the constant volume chamber, creating physical isolation to prevent detergent backflow / air infiltration and ensure system sealing. When ambient temperature changes or detergent viscosity varies, the first check valve opens and closes solely based on pressure difference, unaffected by liquid physical properties, ensuring stable suction volume. Simultaneously, the first solenoid valve, located within the constant volume chamber, effectively prevents malfunctions caused by pressure fluctuations in the first connecting pipe.

[0018] Preferably, a second one-way valve is provided at the end of the second connecting pipe that extends into the fixed volume cavity. The second one-way valve is used to draw detergent into the fixed volume cavity in a measured amount and then closes due to buoyancy.

[0019] This setup automatically cuts off the suction process through physical buoyancy, making it insensitive to detergent viscosity. Even high-viscosity liquids can reliably trigger valve closure, avoiding the jamming problem caused by liquid viscosity in traditional solenoid valves and reducing errors caused by electrical signal delays or interference.

[0020] Preferably, a third one-way valve is provided at the end of the discharge pipe that extends into the volume-fixing chamber, for discharging the mixed solution in the volume-fixing chamber outward into the washing tub. By setting the first one-way valve, the second one-way valve, and the third one-way valve, the flow direction and dosage of the detergent can be effectively controlled, ensuring the normal operation of the system and the stability of the washing effect, while also improving the system's operational convenience and safety.

[0021] Compared with the prior art, the detergent dispensing device of this utility model has the following advantages:

[0022] 1) This utility model uses a negative pressure pump to achieve the suction and dispensing of detergent. Compared with peristaltic pumps or double negative pressure suction schemes, negative pressure pumps usually have a simpler structure, are easier to manufacture and maintain. At the same time, negative pressure pumps have higher working efficiency, can achieve the suction and dispensing of detergent with lower power, thereby saving energy. Furthermore, the suction speed and dispensing amount can be precisely controlled as needed, improving the accuracy and stability of detergent dispensing.

[0023] 2) This utility model uses a fixed-volume chamber as an intermediate container, so that the negative pressure pump only draws in air and does not directly contact the detergent. At the same time, it can also prevent backflow impact on the main chamber when the negative pressure pump or water inlet valve is abnormal. In addition, the fixed volume design of the fixed-volume chamber makes it less affected by the expansion / contraction of ambient temperature. Together with the negative pressure pump and the second solenoid valve, it can quantitatively draw detergent from the detergent chamber and achieve accurate measurement of detergent.

[0024] 3) This utility model effectively controls the flow direction and dosage of detergent by setting multiple one-way valves, ensuring the normal operation of the system and the stability of the washing effect, while also improving the ease of operation and safety of the system.

[0025] This utility model also provides a washing machine, including the aforementioned detergent dispensing device. The washing machine has the same beneficial effects as the detergent dispensing device, which will not be described in detail here.

[0026] Preferably, the washing machine includes a water inlet box, and the detergent dispensing device is integrated with the water inlet box. This design reduces the number of independent valves and piping components, lowering component procurement costs and assembly complexity; it also shortens the mixing path of detergent and water, reducing interference from the external environment on the dispensing amount; through the synergistic effect of the volume-regulating chamber and valve assembly, combined with the integrated water inlet valve to precisely control the mixing ratio, it achieves the effect of "quantitative detergent extraction + precise dilution in the volume-regulating chamber". Furthermore, it saves internal space in the washing machine, facilitating product miniaturization.

[0027] Preferably, the water inlet valve is a solenoid valve, used to simultaneously control the water inlet of the detergent dispensing device and the washing machine. This configuration utilizes the characteristics of the solenoid valve, such as fast response speed and high opening and closing accuracy, to precisely control the amount of water entering the constant volume chamber, reducing the impact of ambient temperature and water pressure fluctuations on the mixing ratio and ensuring a stable mixing ratio of detergent and water. The solenoid valve is linked with the negative pressure pump to achieve closed-loop control of "negative pressure suction of detergent → quantitative water dilution → mixed discharge", improving the consistency of the dispensing amount. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the detergent dispensing device described in an embodiment of the present invention;

[0029] Figure 2 This is another schematic diagram of the detergent dispensing device described in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Detergent container; 2-Negative pressure pump; 3-Water inlet valve; 4-First check valve; 5-Fixed volume chamber; 6-First connecting pipe; 7-Second connecting pipe; 8-Third connecting pipe; 9-Discharge pipe; 10-Second check valve; 11-Third check valve. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Without conflict, the technical features of the embodiments of this utility model can be combined with each other.

[0033] like Figure 1-2 As shown, this utility model discloses a detergent dispensing device, comprising:

[0034] Detergent container 1, used to store detergent;

[0035] Negative pressure pump 2 draws detergent from detergent chamber 1 using negative pressure;

[0036] Water inlet valve 3 is used to mix water with detergent pumped out by negative pressure pump 2 and add it to the system.

[0037] This application discloses a detergent dispensing device that uses a negative pressure pump 2 to achieve detergent suction and dispensing. Compared with peristaltic pumps or dual negative pressure suction schemes, the negative pressure pump 2 typically has a simpler structure, is easier to manufacture and maintain, and has higher working efficiency, enabling detergent suction and dispensing with lower power, thereby saving energy. Furthermore, the suction speed and dispensing amount can be precisely controlled as needed, improving the accuracy and stability of detergent dispensing. In addition, the negative pressure pump 2 controls air pressure changes to suction detergent, and is minimally affected by differences in the viscosity of different detergents, improving the device's compatibility with different types of detergents.

[0038] As a preferred example of this application, a first one-way valve 4 is provided in the pipeline through which the negative pressure pump 2 draws detergent into the detergent chamber 1. This arrangement is used to prevent detergent or washing water from flowing back into the detergent chamber 1 when the negative pressure pump 2 stops operating, ensuring that the detergent can only flow towards the negative pressure pump 2 and cannot flow back into the detergent chamber 1, thus avoiding waste of detergent and contamination inside the detergent chamber 1, and improving the stability and reliability of the detergent dispensing device.

[0039] As a preferred example of this application, a fixed-volume chamber 5 is provided between the negative pressure pump 2 and the detergent chamber 1. The fixed-volume chamber 5 and the detergent chamber 1 are connected by a first connecting pipe 6. The negative pressure pump 2 is connected to the fixed-volume chamber 5 by a second connecting pipe 7. The fixed-volume chamber 5 is connected to the water inlet valve 3 by a third connecting pipe 8. The fixed-volume chamber 5 is also provided with a discharge pipe 9. When the negative pressure pump 2 is working, it can draw air from the inside of the fixed-volume chamber 5 to create a negative pressure inside. At this time, the detergent in the detergent chamber 1 is drawn into the fixed-volume chamber 5. After the drawing is completed, the water inlet valve 3 introduces water into the fixed-volume chamber 5. After the washing water mixes with the detergent drawn into the fixed-volume chamber 5, it is discharged out through the discharge pipe 9.

[0040] This application sets up a fixed-volume chamber 5 as an intermediate container, so that the negative pressure pump 2 only draws in air and does not directly contact the detergent. At the same time, it can also prevent backflow impact on the main chamber when the negative pressure pump 2 or the water inlet valve 3 malfunctions. In addition, the fixed volume design of the fixed-volume chamber 5 makes it less affected by the expansion / contraction of ambient temperature. Together with the negative pressure pump 2 and the second solenoid valve 10, it can quantitatively draw detergent from the detergent chamber 1, so as to achieve accurate measurement of detergent.

[0041] As a preferred example of this application, a first one-way valve 4 is provided at the end of the first connecting pipe 6 that extends into the constant volume chamber 5. The first one-way valve 4 opens when the constant volume chamber 5 is under negative pressure and closes when the constant volume chamber 5 is under normal pressure or positive pressure.

[0042] This setup, via the first solenoid valve 4, completely disconnects the first connecting pipe 6 from the constant volume chamber 5, creating physical isolation to prevent detergent backflow / air infiltration and ensure system sealing. When ambient temperature changes or detergent viscosity varies, the first one-way valve 4 opens and closes solely based on pressure difference, unaffected by the liquid's physical properties, ensuring stable suction volume. Simultaneously, the first solenoid valve 4, located within the constant volume chamber 5, effectively prevents malfunctions caused by pressure fluctuations in the first connecting pipe 6.

[0043] Specifically, when the negative pressure pump 2 draws and creates negative pressure in the constant volume chamber 5, the first solenoid valve 4 installed in the constant volume chamber 5 can accurately sense the real-time pressure change of the constant volume chamber 5 and open when the negative pressure reaches the preset value. When the constant volume chamber 5 completes the drawing and returns to normal pressure, the first one-way valve 4 automatically closes due to the pressure difference, physically blocking the backflow of detergent and avoiding contamination of the detergent chamber 1.

[0044] As a preferred example of this application, a second one-way valve 10 is provided at the end of the second connecting pipe 7 that extends into the constant volume chamber 5. The second one-way valve 10 is used to quantitatively draw detergent from the constant volume chamber 5 and then closes due to buoyancy. This setting automatically cuts off the drawing process through physical buoyancy, is insensitive to the viscosity of the detergent, and can reliably trigger the valve to close even with high-viscosity liquids. This avoids the jamming problem caused by liquid viscosity in traditional solenoid valves and reduces errors caused by electrical signal delays or interference.

[0045] Specifically, when the detergent in the constant volume chamber 5 is quantitatively drawn to the preset capacity, the liquid level rises and pushes the buoyancy element (such as a float) to trigger the second one-way valve 10 to close, ensuring that the detergent dosage drawn each time strictly conforms to the volume of the constant volume chamber; after the negative pressure pump 2 stops running, it can block its connection with the constant volume chamber 5, maintain the stability of the negative pressure environment in the constant volume chamber 5, and prevent external air from entering and affecting the mixing ratio.

[0046] As a preferred example of this application, a third one-way valve 11 is provided at the end of the discharge pipe 9 that extends into the volumetric cavity 5, for discharging the mixed solution in the volumetric cavity 5 outward into the washing tub.

[0047] By setting the first one-way valve 4, the second one-way valve 10, and the third one-way valve 11, the flow direction and dosage of detergent can be effectively controlled, ensuring the normal operation of the system and the stability of the washing effect, while also improving the system's ease of operation and safety.

[0048] This utility model also provides a washing machine, including the aforementioned detergent dispensing device. The washing machine has the same beneficial effects as the detergent dispensing device, which will not be described in detail here.

[0049] The detergent dispensing device can be a standalone external device or an integrated device on the washing machine. Preferably, the detergent dispensing device is highly integrated with the main water inlet valve 3 and the water inlet box on the washing machine. This design reduces the number of independent valves and piping components, lowering component procurement costs and assembly complexity; it also shortens the mixing path of detergent and water, reducing interference from the external environment on the dispensing amount; through the synergistic effect of the volume-regulating chamber 5 and the valve assembly, combined with the integrated water inlet valve 3, the mixing ratio is precisely controlled, achieving the effect of "quantitative detergent extraction + precise dilution in the volume-regulating chamber". Furthermore, it saves internal space in the washing machine, facilitating product miniaturization.

[0050] Preferably, the water inlet valve 3 is a solenoid valve, used to simultaneously control the water inlet of the detergent dispensing device and the washing machine. In other words, the detergent dispensing device shares the washing machine's water inlet valve 3. This configuration utilizes the solenoid valve's fast response speed and high opening and closing accuracy to precisely control the amount of water entering the constant volume chamber 5, reducing the impact of ambient temperature and water pressure fluctuations on the mixing ratio and ensuring a stable detergent-water mixing ratio. The solenoid valve is linked with the negative pressure pump 2 to achieve closed-loop control of "negative pressure suction of detergent → quantitative water dilution → mixed discharge," improving the consistency of the dispensing amount.

[0051] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A detergent dispensing device characterized by comprising: The detergent delivery device comprises: a detergent container (1) for storing detergent; a negative pressure pump (2) for sucking the detergent in the detergent container (1) by negative pressure; a water inlet valve (3) for controlling water inlet, which is mixed with the detergent sucked by the negative pressure pump (2) and then delivered.

2. The detergent dispensing device according to claim 1, characterized by A first one-way valve (4) is arranged on the connecting pipeline between the negative pressure pump (2) and the detergent container (1).

3. The detergent dispensing device according to claim 1 or 2, characterized in that, The detergent delivery device further comprises a constant volume chamber (5) arranged between the negative pressure pump (2) and the detergent container (1), and the water inlet valve (3) is used for controlling water inlet into the constant volume chamber (5), which is mixed with the detergent sucked by the negative pressure pump (2) and then delivered.

4. The detergent dispensing device according to claim 3, characterized in that The constant volume chamber (5) and the detergent container (1) are communicated through a first connecting pipeline (6), the negative pressure pump (2) is connected with the constant volume chamber (5) through a second connecting pipeline (7), the constant volume chamber (5) is communicated with the water inlet valve (3) through a third connecting pipeline (8), and the constant volume chamber (5) is further provided with a discharge pipeline (9). When the negative pressure pump (2) works, it can suck the air in the constant volume chamber (5) to generate negative pressure in the constant volume chamber (5), the detergent in the detergent container (1) is sucked into the constant volume chamber (5), after the suction is completed, the water inlet valve (3) is opened to inlet water into the constant volume chamber (5), which is mixed with the detergent sucked into the constant volume chamber (5) and then discharged outward through the discharge pipeline (9).

5. The detergent dispensing device according to claim 4, characterized in that A first one-way valve (4) is arranged on the end of the first connecting pipeline (6) extending into the constant volume chamber (5), which is opened when the constant volume chamber (5) is under negative pressure and closed when the constant volume chamber (5) is under normal pressure or positive pressure.

6. The detergent dispensing device according to claim 5, characterized by A second one-way valve (10) is arranged on the end of the second connecting pipeline (7) extending into the constant volume chamber (5), which is used for closing by buoyancy after the constant volume chamber (5) sucks the detergent quantitatively.

7. The detergent dispensing device according to claim 6, characterized by A third one-way valve (11) is arranged on the end of the discharge pipeline (9) extending into the constant volume chamber (5), which is used for controlling the mixed solution in the constant volume chamber (5) to discharge outward.

8. A laundry machine characterized by The detergent delivery device comprises the device according to any one of claims 1-7.

9. A laundry washing machine according to Claim 8, characterized in that The washing machine comprises a water inlet box, and the detergent delivery device is integrally arranged with the water inlet box.

10. The laundry machine of claim 8, wherein, The water inlet valve (3) is an electromagnetic valve, which is used for simultaneously controlling water inlet of the detergent delivery device and the washing machine. The washing machine comprises a water inlet box, and the detergent delivery device is integrally arranged with the water inlet box. The water inlet valve (3) is an electromagnetic valve, which is used for simultaneously controlling water inlet of the detergent delivery device and the washing machine.

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