Automatic dispensing device and method for a washing agent

Abstract

The application provides an automatic dispensing device and method for washing agent, which is communicated with a water supply device and a washing barrel respectively, and comprises a main passage, a bypass, a backflow passage and at least one storage box. The main passage is communicated with the water supply device and the washing barrel, the bypass is connected with the main passage, the backflow passage is communicated with the bypass and the washing barrel, and at least one control valve is arranged on the bypass. The storage box is communicated with the bypass through a dispensing passage, the storage box is connected with a pressure supply device, a valve body is arranged on the dispensing passage, and a flow detection device is arranged on the backflow passage. The automatic dispensing device and method for washing agent can accurately control the dispensing amount of the washing agent, and the venturi negative pressure device in the prior art is omitted, so that the difficulty of pipeline assembly is reduced, the structure of the automatic dispensing device is simplified to a certain extent, the processing and assembly of the automatic dispensing device are facilitated, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to an automatic dispensing device and method for detergents, and particularly to an automatic dispensing device and method for liquid detergents. Background Technology

[0002] With economic development and rising living standards, the demand for laundry equipment (such as washing machines and dishwashers) is also increasing. Conventional laundry equipment often requires users to pre-store liquid detergent in a designated container, and the equipment then flushes the detergent into the washing tub using water or other mechanical methods. This method relies on the user's discretion in dispensing detergent, and detergent needs to be added to the container after each wash. As detergents become increasingly liquid, storing larger quantities of detergent in the equipment is becoming a trend. This allows users to add the required amount during the wash cycle, reducing user hassle and automatically adjusting the detergent dosage based on the type and quantity of laundry. Therefore, equipping laundry equipment with automatic detergent dispensing devices is a future development direction.

[0003] However, existing automatic detergent dispensing devices often suffer from complex structures and insufficient dispensing accuracy. Patent application number 200820038898.1 discloses a washing machine detergent dispensing device utilizing the Venturi effect. It includes a detergent tank for storing detergent, a detergent inlet hole formed at the bottom of the tank, and a pipe with a solenoid valve connected to the inlet hole. The other end of the pipe is connected to a small-hole tube of a Venturi tube. A metering device with a valve may or may not be installed on the pipe before the Venturi tube. The Venturi tube is connected to a delivery pipe before connecting to the detergent dispenser; this delivery pipe can also be directly directed towards the washing machine. However, the detergent dispensing device in this application uses the flow of tap water to generate negative pressure. The magnitude of the negative pressure is greatly related to the tap water pressure and flow rate. Therefore, when the negative pressure is generated directly by the water inlet of the solenoid valve in the washing equipment, the range of negative pressure fluctuation will be very large, and it is difficult to control the detergent dispensing accuracy. At the same time, the detergent dispensing device in this application has a relatively complex structure, especially the setting of the venturi tube, which is not only inconvenient to process and assemble, but also not conducive to reducing production costs.

[0004] Patent application number 201310358805.9 discloses a detergent dispensing controller, which has a main channel, one end of which is an inlet for the input liquid flow, and the other end of which is an outlet that can be connected to the water inlet of the washing tub. It includes valves A, B, C, and D, a collection chamber, and a Venturi negative pressure generator. The inlet of valve A is connected to the main channel via a bypass connection. The inlet of valve B can be connected to the detergent A storage tank. The outlets of valves A and B are connected to the inlet of valve C. The inlet of valve D can be connected to the detergent B storage tank. The outlets of valves C and D are connected to the inlet of the collection chamber. The outlet of the collection chamber is connected to the negative pressure port of the Venturi negative pressure generator via a return channel. The outlet of the Venturi negative pressure generator is connected to the inlet of the main channel. The inlet of the Venturi negative pressure generator is an inlet connected to a water source. However, the detergent dispensing controller in this application has a relatively complex structure, especially the setting of the Venturi negative pressure generator, which is not only inconvenient to process and assemble, but also not conducive to reducing production costs. Summary of the Invention

[0005] In view of this, the present invention aims to provide an automatic detergent dispensing device and method to solve the problems of complex structure and inaccurate dispensing accuracy in the prior art.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] An automatic detergent dispensing device is disclosed, which is connected to a water supply device and a washing tub. The device includes a main passage, a bypass, a return passage, and at least one storage box. The main passage is connected to the water supply device and the washing tub. The inlet of the bypass is connected to the main passage, the inlet of the return passage is connected to the outlet of the bypass, and the outlet of the return passage is connected to the washing tub. At least one control valve is installed on the bypass. The storage box is connected to the bypass via the dispensing passage, and the outlet of the dispensing passage is connected to the outlet of the control valve. The storage box is connected to a pressure supply device. A valve body is installed on the dispensing passage, and a flow detection device is installed on the return passage.

[0008] Furthermore, the valve body includes at least one of a check valve, a solenoid valve, and a switching valve.

[0009] Furthermore, the automatic dispensing device includes a liquid collection chamber, and the outlet of the bypass is connected to the inlet of the return flow path through the liquid collection chamber.

[0010] Furthermore, the storage box is connected to the liquid collection chamber via a dispensing channel.

[0011] Furthermore, the storage box includes a first box body and a second box body; the dispensing passage includes a first passage and a second passage; the first box body is connected to a bypass or a liquid collection chamber through the first passage; the second box body is connected to a bypass or a liquid collection chamber through the second passage; the valve body includes a first check valve and a second check valve, with the first check valve provided on the first passage and the second check valve provided on the second passage.

[0012] Furthermore, the control valve includes a first control valve and a second control valve, wherein the outlet of the first control valve is connected to the outlet of the first check valve and the inlet of the second control valve, and the outlet of the second control valve is connected to the outlet of the second check valve.

[0013] Furthermore, the storage box includes a first box body and a second box body; the valve body is a three-way switching valve, the inlet of the valve body is connected to the first box body and the second box body respectively, and the outlet of the valve body is connected to the bypass through the dispensing passage.

[0014] Furthermore, the pressure supply device includes a first air pump and a second air pump, wherein the first air pump is connected to a first housing and the second air pump is connected to a second housing.

[0015] Furthermore, the pressure supply device includes an air pump and a three-way switching device. The air pump is connected to the inlet of the three-way switching device, and the outlet of the three-way switching device is connected to the first housing and the second housing, respectively.

[0016] A method for dispensing detergent using an automatic detergent dispensing device, wherein the automatic dispensing device is the aforementioned automatic detergent dispensing device, the method comprising:

[0017] S1. Turn on the water supply device;

[0018] S2. Close the control valve and turn on the pressure supply device;

[0019] S3. Real-time acquisition of the cumulative fluid flow rate from the flow detection device;

[0020] S4. Determine whether the change in the cumulative flow rate of the fluid has reached the preset value; if yes, proceed to step S5; otherwise, return to step S3.

[0021] S5. Close the pressure supply device and open the control valve;

[0022] S6. Turn off the water supply device.

[0023] Compared with existing technologies, the automatic detergent dispensing device and method described in this invention have the following advantages:

[0024] The present invention discloses an automatic detergent dispensing device and method. By setting a bypass on the main channel, and with the cooperation of a control valve and a flow detection device, a pressure supply device is used to dispense the detergent from the storage box into the bypass, thereby enabling precise control of the amount of detergent dispensed. In addition, in this embodiment, the pressure supply device provides power for the dispensing of detergent, eliminating the need for the Venturi negative pressure device commonly used in the prior art. This not only reduces the difficulty of pipeline assembly but also simplifies the structure of the automatic dispensing device to a certain extent, facilitating its processing and assembly and helping to reduce production costs. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

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

[0027] Figure 2 This is a schematic diagram of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention;

[0028] Figure 3 This is another schematic diagram of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention;

[0029] Figure 4 This is a structural diagram of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention;

[0030] Figure 5 This is a structural diagram of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention;

[0031] Figure 6 This is another structural diagram of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of an automatic detergent dispensing device and dispensing method according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] Water supply device 1, washing tub 2, main passage 3, bypass 4, control valve 41, first control valve 41a, second control valve 41b, liquid collection chamber 42, flow detection device 43, dispensing passage 5, first passage 5a, second passage 5b, valve body 51, first check valve 51a, second check valve 51b, storage box 6, first box body 6a, second box body 6b, pressure supply device 7, air pump 71, first air pump 71a, second air pump 71b, three-way switching device 72, return passage 8. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0037] Additionally, it should be noted that the detergents mentioned in the embodiments of the present invention refer to liquid detergents in the prior art, including conventional detergents, fabric softeners, bleach, and other products. Since they are all prior art, they will not be described in detail here.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] As attached Figure 1-8 As shown, an automatic detergent dispensing device is connected to a water supply device 1 and a washing tub 2. The water supply device 1 is a conventional household tap water pipe or water tank. The water supply device 1 provides washing water, which flows through the automatic dispensing device. At the same time, the automatic dispensing device dispenses detergent into the washing water, so that the detergent can enter the washing tub 2 with the washing water, thereby realizing the dispensing of detergent.

[0041] To address the issues of complex structure and insufficient dispensing accuracy in existing automatic dispensing devices, this embodiment includes a main passage 3, a bypass 4, a return passage 8, and at least one storage box 6. The main passage 3 is connected to the water supply device 1 and the washing tub 2. The inlet of the bypass 4 is connected to the main passage 3. The inlet of the return passage 8 is connected to the outlet of the bypass 4. The outlet of the return passage 8 is connected to the washing tub 2. At least one control valve 41 is provided on the bypass 4. The control valve 41 is a conventional valve such as a solenoid valve or a pneumatic valve.

[0042] The storage box 6 has an internal cavity for holding detergent. Between the control valve 41 and the return flow path 8, the storage box 6 is connected to the bypass 4 via the dispensing passage 5. That is, the outlet of the dispensing passage 5 is connected to the outlet of the control valve 41. The storage box 6 is connected to the pressure supply device 7, which is a pneumatic pressure supply device used to pressurize the storage box 6. Specifically, the pressure supply device 7 is a conventional pressure supply device such as an air pump or an air bag.

[0043] A valve body 51 is provided on the delivery passage 5, and a flow detection device 43 is provided on the return passage 8 to detect the flow rate of the liquid substance in the return passage 8. The flow detection device 43 is a conventional flow meter or flow sensor.

[0044] The valve body 51 can be a solenoid valve. When detergent needs to be added, the control valve 41 is closed first, and the clean water stops flowing into the bypass 4. Then, the air pump and valve body 51 are turned on at the same time. The air pump pressurizes the storage box 6. Under the pressure, the detergent flows through the valve body 51 and the addition passage 5 and enters the bypass 4. After the amount of detergent added reaches the preset amount, the air pump and valve body 51 are turned off. Then, the control valve 41 is turned on, and the clean water flows back into the bypass 4. It also drives the detergent added to the bypass 4 to flow through the return passage 8 and enter the washing tub 2, thereby realizing the addition of detergent.

[0045] The valve body 51 can be a one-way valve, used to restrict the flow direction of liquid substances in the dispensing passage 5, so that the detergent in the storage box 6 can be dispensed into the bypass 4, while preventing the substances in the bypass 4 from flowing back into the storage box 6, thus avoiding contamination of the detergent in the storage box 6; wherein, when the valve body 51 is a one-way valve, the dispensing process of the detergent is the same as when the valve body 51 is a solenoid valve, except that the one-way valve can be set to a normally open state.

[0046] The valve body 51 can be a switching valve, such as a three-way or multi-way switching valve, which can switch the opening and closing states in different passages to control the flow of different passages. The detergent dosing process is the same as the dosing process when the valve body 51 is a solenoid valve. The difference is that the solenoid valve controls the flow of the passage by controlling the opening and closing of the valve, while the switching valve controls the flow of the passage by switching the connection state between the valve and the pipeline.

[0047] Meanwhile, in the automatic dispensing device, the valve body 51 can also be used in combination with other valves such as check valves, solenoid valves, and switching valves. The specific usage process is basically the same as that of each individual valve, and will not be described in detail here.

[0048] Example 2

[0049] Based on the structure of Example 1, this embodiment provides a method for dispensing detergent, including:

[0050] S1. Turn on water supply device 1;

[0051] At this time, the control valve 41 can be in the open state or the closed state. When the control valve 41 is in the open state, the washing water provided by the water supply device 1 flows into the washing tub 2 through the main passage 3, and also flows into the washing tub 2 through the bypass 4 and the return passage 8. When the control valve 41 is in the closed state, the washing water provided by the water supply device 1 flows into the washing tub 2 only through the main passage 3.

[0052] S2. Close control valve 41 and turn on pressure supply device 7;

[0053] It should be noted that if the valve body 51 is a check valve, the check valve is set to the normally open state, and only the pressure supply device 7 needs to be turned on, without operating the valve body 51; if the valve body 51 is a solenoid valve or a switching valve, the valve body 51 needs to be turned on or the corresponding switching operation needs to be performed on the valve body 51 when the pressure supply device 7 is turned on.

[0054] Specifically, taking valve body 51 as a one-way valve as an example, in order to ensure precise control of the amount of detergent added while dispensing detergent, firstly, ensure that control valve 41 is in the closed state, and at the same time, flow detection device 43 stops metering, thereby avoiding interference from washing water on the measurement of detergent dosage; then, turn on pressure supply device 7, and pressurize storage box 6. When the pressure in storage box 6 reaches the pressure threshold, the detergent in storage box 6 flows through valve body 51 through dispensing passage 5 and enters bypass 4.

[0055] S3. Real-time acquisition of the cumulative fluid flow value of the flow detection device 43;

[0056] Based on step S2, as the detergent is added, the flow detection device 43 restarts metering and acquires the cumulative fluid flow value of the flow detection device 43 in real time.

[0057] S4. Determine whether the change in the cumulative flow rate of the fluid has reached the preset value; if yes, proceed to step S5; otherwise, return to step S3.

[0058] After the pressure supply device 7 is turned on, the cumulative fluid flow rate value obtained in real time in step S3 is used to determine whether the change in the cumulative fluid flow rate since the pressure supply device 7 was turned on has reached the preset value. If yes, it means that the detergent dosage has reached the preset dosage and the subsequent step S5 can be continued. If no, it means that the detergent dosage has not reached the preset dosage and the dosage still needs to be continued.

[0059] S5. Close the pressure supply device 7 and open the control valve 41;

[0060] It should be noted that if the valve body 51 is a check valve, the check valve is set to the normally open state. Only the pressure supply device 7 needs to be closed, and no operation is required on the valve body 51. Then the control valve 41 is opened. If the valve body 51 is a solenoid valve or a switching valve, the pressure supply device 7 needs to be closed, the valve body 51 needs to be closed, or the valve body 51 needs to be switched accordingly. Then the control valve 41 is opened.

[0061] Specifically, taking valve body 51 as a one-way valve as an example, after the detection and judgment in step S4, when the detergent reaches the preset dosage, the pressure supply device 7 can be closed, thereby stopping the detergent from being dispensed; then the control valve 41 is opened, the washing water flows into the bypass 4, and drives the detergent to flow through the return flow path 8 and into the washing tub 2.

[0062] S6. Turn off water supply device 1.

[0063] As is the case with conventional settings or common understanding, when the amount of water entering the washing tub 2 reaches the predetermined amount, or when the water entering the tub reaches the preset duration, the water supply device 1 is turned off and the water entering the tub stops.

[0064] Therefore, in this embodiment, by setting a bypass 4 on the main passage 3, and with the cooperation of the control valve 41 and the flow detection device 43, the detergent in the storage box 6 is added to the bypass 4 using the pressure supply device 7, thereby enabling precise control of the amount of detergent added. In addition, in this embodiment, the pressure supply device 7 provides power for the addition of detergent, eliminating the Venturi negative pressure device commonly used in the prior art. This not only reduces the difficulty of pipeline assembly, but also simplifies the structure of the automatic dispensing device to a certain extent, making it easier to process and assemble the automatic dispensing device, and helping to reduce production costs.

[0065] Example 3

[0066] Considering that everyday detergents are quite viscous, mixing and diluting them with washing water in bypass 4 and return flow path 8 may result in insufficient dilution, affecting detergent dosage. To ensure adequate dilution of the detergent, please refer to the attached instructions. Figure 1As shown, this embodiment is based on Embodiment 1 or Embodiment 2 with corresponding structural modifications. The automatic dispensing device includes a liquid collection chamber 42. The outlet of the bypass 4 is connected to the inlet of the return flow path 8 through the liquid collection chamber 42. That is, the liquid collection chamber 42 is connected to both the bypass 4 and the return flow path 8, providing a relatively large liquid storage space. This allows the detergent added to the bypass 4 to be fully diluted in the liquid collection chamber 42 before flowing into the return flow path 8. The flow detection device 43 on the return flow path 8 detects the flow rate, thereby preventing the more viscous detergent from flowing directly through the flow detection device 43, which could lead to unstable readings, reading errors, or blockages in the flow detection device 43. This helps protect the flow detection device 43, ensuring the accuracy and stability of the flow detection device 43 readings even after multiple uses of the automatic dispensing device.

[0067] Meanwhile, as attached Figure 2 As shown, the storage box 6 can also be connected to the collection chamber 42 through the dispensing passage 5, so that the detergent dispensed in the storage box 6 can enter the collection chamber 42 directly without passing through the bypass 4.

[0068] As in Embodiment 1 or Embodiment 2, the valve body 51 includes at least one of a check valve, a solenoid valve, and a switching valve.

[0069] Example 4

[0070] Considering that everyday washing equipment often requires the use of multiple detergents, in order to facilitate daily use and operation by users, and to avoid cross-contamination between different detergents, as shown in the attached document... Figure 3 As shown, this embodiment is based on any one of the embodiments in embodiments 1-3 with corresponding structural modifications; the automatic dispensing device includes at least two storage boxes 6;

[0071] Specifically, taking the automatic dispensing device as an example, which includes two storage boxes 6, namely a first box body 6a and a second box body 6b; correspondingly, the dispensing passage 5 includes a first passage 5a and a second passage 5b that are independent of each other. Between the control valve 41 and the return passage 8, the first box body 6a is connected to the bypass 4 or the liquid collection chamber 42 through the first passage 5a, and the second box body 6b is connected to the bypass 4 or the liquid collection chamber 42 through the second passage 5b; the valve body 51 includes a first check valve 51a and a second check valve 51b. The first check valve 51a is provided on the first passage 5a, and the second check valve 51b is provided on the second passage 5b.

[0072] The pressure supply device 7 includes a first air pump 71a and a second air pump 71b. The first housing 6a is connected to the first air pump 71a, and the second housing 6b is connected to the second air pump 71b.

[0073] Specifically, when adding detergent, if the detergent stored in the first container 6a is needed, simply close the control valve 41, then turn on the first air pump 71a, keeping the second air pump 71b closed, to add the detergent from the first container 6a. If the detergent stored in the second container 6b is needed, simply close the control valve 41, then turn on the second air pump 71b, keeping the first air pump 71a closed, to add the detergent from the second container 6b. Once the preset amount of detergent has been added, simply turn off the corresponding air pump and then turn on the control valve 41 to add the detergent into the washing tub 2.

[0074] Example 5

[0075] To further control the dosing process of different detergents, see attached... Figure 4 As shown, this embodiment is based on embodiment 4 with corresponding structural changes; at least two control valves 41 are provided on the bypass 4, and the control valves 41 correspond one-to-one with the storage box 6;

[0076] Specifically, taking the automatic dispensing device including two storage boxes 6 as an example, the bypass 4 is provided with a first control valve 41a and a second control valve 41b; between the first control valve 41a and the second control valve 41b, the first box 6a is connected to the bypass 4 through a first passage 5a; between the second control valve 41b and the return passage 8, the second box 6b is connected to the bypass 4 or the liquid collection chamber 42 through a second passage 5b; specifically, the outlet of the first control valve 41a is connected to the outlet of the first one-way valve 51a and the inlet of the second control valve 41b, and the outlet of the second control valve 41b is connected to the outlet of the second one-way valve 51b.

[0077] Specifically, when adding detergent, if the detergent stored in the first container 6a is needed, simply close the first control valve 41a, keep the second control valve 41b open, then turn on the first air pump 71a and keep the second air pump 71b closed to add the detergent from the first container 6a. If the detergent stored in the second container 6b is needed, simply close the second control valve 41b, then turn on the second air pump 71b and keep the first air pump 71a closed to add the detergent from the second container 6b. Once the preset amount of detergent has been added, simply turn off the corresponding air pump and keep both the first and second control valves 41a and 41b open to add the detergent into the washing tub 2.

[0078] Example 6

[0079] As attached Figure 5As shown, this embodiment is based on embodiment 4 with corresponding structural changes; the pressure supply device 7 includes an air pump 71 and a three-way switching device 72. The air pump 71 is connected to the three-way switching device 72, and the three-way switching device 72 is connected to the first housing 6a and the second housing 6b respectively; specifically, the air pump 71 is connected to the inlet of the three-way switching device 72, and the outlet of the three-way switching device 72 is connected to the first housing 6a and the second housing 6b respectively.

[0080] Specifically, when adding detergent, if the detergent stored in the first container 6a is needed, simply close the control valve 41, then switch the three-way switch device 72 to connect with the first container 6a, and turn on the air pump 71 to add the detergent from the first container 6a. If the detergent stored in the second container 6b is needed, simply close the control valve 41, then switch the three-way switch device 72 to connect with the second container 6b, and turn on the air pump 71 to add the detergent from the second container 6b. Once the preset amount of detergent has been added, simply turn off the air pump 71 and then open the control valve 41 to add the detergent into the washing tub 2.

[0081] Example 7

[0082] As attached Figure 6 As shown, this embodiment is based on embodiment 5 with corresponding structural modifications; the pressure supply device 7 includes an air pump 71 and a three-way switching device 72, the air pump 71 is connected to the three-way switching device 72, and the three-way switching device 72 is connected to the first housing 6a and the second housing 6b respectively; specifically, the air pump 71 is connected to the inlet of the three-way switching device 72, and the outlet of the three-way switching device 72 is connected to the first housing 6a and the second housing 6b respectively.

[0083] Specifically, when adding detergent, if the detergent stored in the first container 6a is needed, simply close the first control valve 41a, keep the second control valve 41b open, then switch the three-way switch device 72 to connect with the first container 6a, and turn on the air pump 71 to add the detergent from the first container 6a. If the detergent stored in the second container 6b is needed, simply close the second control valve 41b, then turn on the second air pump 71b, then switch the three-way switch device 72 to connect with the second container 6b, and turn on the air pump 71 to add the detergent from the second container 6b. Once the preset amount of detergent has been added, simply turn off the air pump 71, and then keep both the first control valve 41a and the second control valve 41b open to add the detergent into the washing tub 2.

[0084] Example 8

[0085] This embodiment is based on the structure of any one of the embodiments in embodiments 4-7 with corresponding modifications. Specifically, this embodiment can be the same as any one of the embodiments in embodiments 4-7, but the difference from embodiments 4-7 is that the valve body 51 includes a first solenoid valve and a second solenoid valve. The first solenoid valve is provided on the first passage 5a and the second solenoid valve is provided on the second passage 5b. It can be regarded as replacing the first one-way valve 51a in embodiments 4-7 with the first solenoid valve and replacing the second one-way valve 51b in embodiments 4-7 with the second solenoid valve. Preferably, the first solenoid valve and the second solenoid valve are in a normally closed state.

[0086] Specifically, in the process of dispensing the detergent stored in the first box 6a, the first solenoid valve needs to be opened when the pressure supply device 7 is turned on, and the first solenoid valve needs to be closed when the pressure supply device 7 is turned off after the detergent has reached the preset dispensing amount. In addition, the operation process of the other components, including the pressure supply device 7, is the same as that of any of the embodiments in Examples 4-7, and will not be described in detail here.

[0087] Similarly, when adding the detergent stored in the second box 6b, the second solenoid valve needs to be opened when the pressure supply device 7 is turned on. After the detergent reaches the preset dosage, the second solenoid valve should be closed when the pressure supply device 7 is turned off. In addition, the operation process of the other components, including the pressure supply device 7, is the same as that of any of the embodiments in Examples 4-7, and will not be described in detail here.

[0088] Example 9

[0089] As attached Figure 7-8 As shown, this embodiment is based on the structure of any one of the embodiments in embodiments 4-7 with corresponding modifications. Specifically, this embodiment can be the same as any one of the embodiments in embodiments 4-7, but the difference from embodiments 4-7 is that the valve body 51 is a three-way switching valve, the inlet of the valve body 51 is connected to the first box 6a and the second box 6b respectively, and the outlet of the valve body 51 is connected to the bypass 4 through the dispensing passage 5; at the same time, only one control valve 41 is provided on the bypass 4, and the outlet of the dispensing passage 5 is connected to the outlet of the control valve 41.

[0090] Preferably, the valve body 51 is a three-way valve structure with a conventional switching function, having at least three switching states, including: a first switching state (only the first housing 6a is connected to the dispensing passage 5), a second switching state (only the second housing 6b is connected to the dispensing passage 5), and a third switching state (neither the first housing 6a nor the second housing 6b is connected to the dispensing passage 5); and the third switching state of the valve body 51 is the conventional state of the valve body 51.

[0091] Specifically, during the process of dispensing the detergent stored in the first box 6a, when the pressure supply device 7 is turned on, the valve body 51 needs to be switched to the first switching state. Then, after the detergent reaches the preset dispensing amount, when the pressure supply device 7 is turned off, the valve body 51 can be switched to the third switching state. In addition, the operation process of the other components, including the pressure supply device 7, is the same as that of any of the embodiments 4-7, and will not be described in detail here.

[0092] Similarly, when adding the detergent stored in the second box 6b, the valve body 51 needs to be switched to the second switching state when the pressure supply device 7 is turned on. Then, after the detergent reaches the preset dosage, the valve body 51 can be switched to the third switching state when the pressure supply device 7 is turned off. In addition, the operation process of the other components, including the pressure supply device 7, is the same as that of any of the embodiments in Examples 4-7, and will not be described in detail here.

[0093] 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of dispensing of an automatic dispensing device for a washing agent, which is communicated with a water supply device (1), a washing tub (2), respectively, characterized in that, The automatic dosing device comprises a main passage (3), a bypass (4), a backflow passage (8) and at least one storage box (6), the main passage (3) is communicated with a water supply device (1) and a washing tub (2), an inlet of the bypass (4) is connected with the main passage (3), an inlet of the backflow passage (8) is communicated with an outlet of the bypass (4), and an outlet of the backflow passage (8) is communicated with the washing tub (2); at least one control valve (41) is arranged on the bypass (4), the storage box (6) is communicated with the bypass (4) through a dosing passage (5), an outlet of the dosing passage (5) is communicated with an outlet of the control valve (41), the storage box (6) is connected with a pressure supply device (7), a valve body (51) is arranged on the dosing passage (5), and a flow detection device (43) is arranged on the backflow passage (8) to detect the flow of the liquid substance in the backflow passage (8), wherein the flow detection device (43) is a flow meter or a flow sensor; The automatic dosing device comprises a liquid collecting cavity (42), the outlet of the bypass (4) is communicated with the inlet of the backflow passage (8) through the liquid collecting cavity (42), and the washing agent dosed into the bypass (4) is fully diluted in the liquid collecting cavity (42) and then flows into the backflow passage (8), so that the washing agent with high viscosity can be prevented from directly flowing through the flow detection device (43); The method comprises: S1, starting the water supply device (1); wherein the control valve (41) is in an open state, and the washing water provided by the water supply device (1) flows into the washing tub (2) through the main passage (3) and flows into the washing tub (2) through the bypass (4) and the backflow passage (8) at the same time; S2, closing the control valve (41) and starting the pressure supply device (7); wherein the control valve (41) is in a closed state, and the flow detection device (43) stops metering at the same time, and then the pressure supply device (7) is started, the pressure supply device (7) pressurizes the storage box (6), and when the pressure in the storage box (6) reaches a pressure threshold value, the washing agent in the storage box (6) flows through the dosing passage (5) through the valve body (51) and enters the bypass (4); S3, acquiring the cumulative flow of the flow detection device (43) in real time; wherein the flow detection device (43) starts metering again, and the cumulative flow value of the flow detection device (43) is acquired in real time as the washing agent is dosed; S4, judging whether the change amount of the cumulative flow reaches a preset value; if yes, performing step S5; otherwise, returning to step S3; S5, closing the pressure supply device (7) and starting the control valve (41); S6, closing the water supply device (1).

2. A dispensing method of an automatic dispensing device for a washing agent according to claim 1, characterized by, The valve body (51) comprises at least one of a one-way valve, an electromagnetic valve and a switching valve.

3. The dispensing method of an automatic dispensing device for a washing agent according to claim 1, characterized by, The storage box (6) is connected with the liquid collecting cavity (42) through the dosing passage (5).

4. The dispensing method of an automatic dispensing device for a washing agent according to claim 1, characterized by, The storage box (6) comprises a first box body (6a) and a second box body (6b); the delivery passage (5) comprises a first passage (5a) and a second passage (5b); the first box body (6a) is communicated with the bypass (4) or the liquid collecting cavity (42) through the first passage (5a); the second box body (6b) is communicated with the bypass (4) or the liquid collecting cavity (42) through the second passage (5b); the valve body (51) comprises a first one-way valve (51a) and a second one-way valve (51b), the first one-way valve (51a) is arranged on the first passage (5a), and the second one-way valve (51b) is arranged on the second passage (5b).

5. A dispensing method of an automatic dispensing device for a washing agent according to claim 4, characterized by, The control valve (41) comprises a first control valve (41a) and a second control valve (41b), the outlet of the first control valve (41a) is communicated with the outlet of the first one-way valve (51a) and the inlet of the second control valve (41b), and the outlet of the second control valve (41b) is communicated with the outlet of the second one-way valve (51b).

6. The dispensing method of an automatic dispensing device for a washing agent according to claim 1, characterized by, The storage box (6) comprises a first box body (6a) and a second box body (6b); the valve body (51) is a three-way switching valve, the inlet of the valve body (51) is communicated with the first box body (6a) and the second box body (6b) respectively, and the outlet of the valve body (51) is communicated with the bypass (4) through the delivery passage (5).

7. A dispensing method for an automatic dispensing device for a washing agent according to any one of claims 4 to 6, characterized in that, The pressure supply device (7) comprises a first air pump (71a) and a second air pump (71b), the first air pump (71a) is connected with the first box body (6a), and the second air pump (71b) is connected with the second box body (6b).

8. A dispensing method of an automatic dispensing device for a washing agent according to any one of claims 4 to 6, characterized in that, The pressure supply device (7) comprises an air pump (71) and a three-way switching device (72), the air pump (71) is connected with the inlet of the three-way switching device (72), and the outlet of the three-way switching device (72) is connected with the first box body (6a) and the second box body (6b) respectively.

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