CN111074495A - Automatic feeding device and feeding method for detergent - Google Patents

Abstract

The invention provides an automatic feeding device and a feeding method of detergent, wherein the automatic feeding device is respectively communicated with a water supply device and a washing barrel, the automatic feeding device 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 the bypass is provided with at least one control valve; the storage box is communicated with the bypass through a feeding passage, the storage box is connected with the pressure supply device, the feeding passage is provided with a valve body, and the backflow passage is provided with a flow detection device; the automatic feeding device and the feeding method of the detergent can accurately control the feeding amount of the detergent; meanwhile, a Venturi negative pressure device in the prior art is omitted, the difficulty of pipeline assembly is reduced, the structure of the automatic feeding device is simplified to a certain extent, the automatic feeding device is convenient to machine and assemble, and the production cost is reduced.

Description

Automatic feeding device and feeding method for detergent

Technical Field

The present invention relates to an automatic detergent dispensing device and a dispensing method, and more particularly, to an automatic liquid detergent dispensing device and a dispensing method.

Background

With the development of economy, the living standard of people is continuously improved, and the demand of washing equipment (such as a washing machine and a dish washing machine) is also continuously improved. In the conventional washing apparatus, a user is required to store liquid detergent to be dispensed in a designated container in advance, and the washing apparatus flushes the detergent into a washing tub by water flush or other mechanical methods according to a washing process. In this method, the amount of detergent to be added depends on the user's discretion, and the detergent needs to be added to the container every washing process. With the continuous improvement of the liquidization of the washing agent, the washing equipment is applied to store a large amount of washing agent at one time, so that a user can put a certain amount of washing agent in the washing equipment according to the requirement in the washing process, the operation trouble of the user can be reduced, and the putting amount of the washing agent can be automatically adjusted according to the different types and the different amounts of the washed objects. Therefore, the automatic detergent feeding device arranged on the washing equipment is a development direction.

However, in the prior art, the automatic detergent feeding device often has the problems of complex structure, inaccurate feeding precision and the like. The patent application No. 200820038898.1 discloses a detergent dispensing device for washing machine using Venturi effect, which comprises a detergent storage tank for storing detergent, a detergent feeding hole formed at the bottom of the detergent storage tank, a pipeline with an electromagnetic valve connected to the detergent feeding hole, and a small hole pipe connected to the other end of the pipeline, wherein a metering device for metering the amount of detergent is installed or not installed on the pipeline before the Venturi tube, and a valve is installed on the metering device. The venturi tube is connected with a section of conveying pipeline and then connected with a detergent box, and the conveying pipeline can also directly face the washing machine. However, the detergent feeding device in the application utilizes the water flow of tap water to generate negative pressure, and the relationship between the magnitude of the negative pressure and the flow of the tap water is large, so that when the water inlet of an electromagnetic valve in washing equipment is directly used to generate the negative pressure, the fluctuation range of the generated negative pressure is very large, and the feeding precision of the detergent is difficult to control; meanwhile, the detergent feeding device in the application is complex in structure, and particularly venturi tubes are arranged, so that the detergent feeding device is not convenient to process and assemble and is not beneficial to reducing the production cost.

The patent application with application number 201310358805.9 discloses a detergent putting controller, which comprises a main channel, wherein one end of the main channel is an inlet for inputting liquid flow, the other end of the main channel is an outlet which can be connected with a water inlet of a washing barrel, and the main channel is provided with a valve A, a valve B and a valve C, valve D, collecting chamber and venturi negative pressure generator, valve A's entry with the main entrance bypass connect, valve B's entry can lead to with detergent A liquid reserve tank, valve A and valve B's export leads to with valve C's entry, valve D's entry can lead to with detergent B liquid reserve tank, valve C and valve D's export leads to with the entry of collecting chamber, and the export of collecting chamber leads to through backflow channel and venturi negative pressure generator's negative pressure mouth, venturi negative pressure generator's export with main entrance leads to even, venturi negative pressure generator's entry is the entry of being connected with the water source. However, the structure of the detergent putting controller in the application is complex, and especially the arrangement of the venturi negative pressure generator is not convenient for processing and assembling, and is not beneficial to reducing the production cost.

Disclosure of Invention

In view of the above, the present invention is directed to an automatic dispensing device and a dispensing method for detergent, so as to solve the problems of complex structure and inaccurate dispensing precision in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an automatic detergent feeding device is respectively communicated with a water supply device and a washing barrel and comprises a main passage, a bypass, a return passage and at least one storage box, wherein the main passage is communicated with the water supply device and the washing barrel, an inlet of the bypass is connected with the main passage, an inlet of the return passage is communicated with an outlet of the bypass, and an outlet of the return passage is communicated with the washing barrel; be provided with at least one control flap on the bypass, storage box is through puting in route and bypass intercommunication, the export of puting in the route and control flap's export intercommunication, storage box and confession pressure device are connected, set up the valve body on the puting in route, be provided with flow detection device on the return flow way.

Further, the valve body comprises at least one of a one-way valve, an electromagnetic valve and a switching valve.

Further, the automatic feeding device comprises a liquid collecting cavity, and an outlet of the bypass is communicated with an inlet of the backflow passage through the liquid collecting cavity.

Further, the storage box is connected with the liquid collection cavity through a feeding passage.

Further, the storage box comprises a first box body and a second box body; the throwing path comprises a first path and a second path; the first box body is communicated with the bypass or the liquid collection cavity through a first passage; the second box body is communicated with the bypass or the liquid collection cavity through a second passage; the valve body comprises a first one-way valve and a second one-way valve, the first one-way valve is arranged on the first passage, and the second one-way valve is arranged on the second passage.

Further, the control valve comprises a first control valve and a second control valve, an outlet of the first control valve is communicated with an outlet of the first one-way valve and an inlet of the second control valve, and an outlet of the second control valve is communicated with an outlet of the second one-way valve.

Further, the storage box comprises a first box body and a second box body; the valve body is a three-way switching valve, an inlet of the valve body is communicated with the first box body and the second box body respectively, and an outlet of the valve body is communicated with the bypass through a throwing passage.

Further, the pressure supply device comprises a first air pump and a second air pump, the first air pump is connected with the first box body, and the second air pump is connected with the second box body.

Further, the pressure supply device comprises an air pump and a three-way switching device, the air pump is connected with an inlet of the three-way switching device, and an outlet of the three-way switching device is respectively connected with the first box body and the second box body.

A method for automatically dispensing detergent, the device comprising:

s1, starting a water supply device;

s2, closing the control valve and opening the pressure supply device;

s3, acquiring the accumulated fluid flow of the flow detection device in real time;

s4, judging whether the variation of the accumulated fluid flow reaches a preset value; if yes, go to step S5; otherwise, returning to step S3;

s5, closing the pressure supply device and opening the control valve;

and S6, closing the water supply device.

Compared with the prior art, the automatic feeding device and the feeding method for the detergent have the following advantages:

according to the automatic feeding device and the feeding method of the detergent, the bypass is arranged on the main passage, and the detergent in the storage box is fed into the bypass by using the pressure supply device under the matching of the control valve and the flow detection device, so that the feeding amount of the detergent can be accurately controlled; in addition, supply the pressure device to provide power for the input of detergent in this embodiment, saved the venturi negative pressure device that adopts usually among the prior art, not only reduced the degree of difficulty of pipeline assembly, simplified the structure of automatic input device moreover to a certain extent, be convenient for automatic input device's processing and assembly are favorable to reduction in production cost.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

FIG. 3 is another schematic diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

FIG. 4 is a structural diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

fig. 5 is a structural diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

FIG. 6 is another structural diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an automatic detergent dispensing device and a dispensing method according to an embodiment of the present invention.

Description of reference numerals:

the device comprises a water supply device 1, a washing barrel 2, a main passage 3, a bypass 4, a control valve 41, a first control valve 41a, a second control valve 41b, a liquid collecting cavity 42, a flow detection device 43, a feeding passage 5, a first passage 5a, a second passage 5b, a valve body 51, a first one-way valve 51a, a second one-way valve 51b, a storage box 6, a first box body 6a, a second box body 6b, a pressure supply device 7, an air pump 71, a first air pump 71a, a second air pump 71b, a three-way switching device 72 and a backflow passage 8.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In addition, it should be noted that, in the embodiments of the present invention, the reference to the detergent refers to the liquid detergent in the prior art, and includes the conventional detergent, softener, bleaching agent and other products, and the details are not repeated herein in view of that they are all the prior art.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

As shown in the attached figures 1-8, an automatic detergent feeding device is respectively communicated with a water supply device 1 and a washing barrel 2; the water supply device 1 is a conventional household tap water pipeline or a water tank, washing water is provided through the water supply device 1, the washing water flows through the automatic putting device, and meanwhile, the automatic putting device puts washing agents into the washing water, so that the washing agents can enter the washing barrel 2 along with the washing water, and the putting of the washing agents is realized.

In order to solve the problems of complex structure and inaccurate dosing precision of the automatic dosing device in the prior art, in the present embodiment, the automatic dosing device includes 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 the water supply device 1 and the 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, an outlet of the backflow passage 8 is communicated with the washing tub 2, the bypass 4 is provided with at least one control valve 41, and the control valve 41 is a conventional valve such as an electromagnetic valve and a pneumatic valve;

a cavity for containing a detergent is arranged in the storage box 6, and between the control valve 41 and the backflow passage 8, the storage box 6 is communicated with the bypass 4 through the feeding passage 5, namely, the outlet of the feeding passage 5 is communicated with the outlet of the control valve 41, the storage box 6 is connected with a pressure supply device 7, and the pressure supply device 7 is an air pressure supply device for pressurizing the storage box 6; specifically, the pressure supply device 7 is conventional pressure supply equipment such as an air pump and an air bag;

the feeding passage 5 is provided with a valve body 51, the backflow passage 8 is provided with a flow detection device 43 for detecting the flow condition of the liquid substance in the backflow passage 8, and the flow detection device 43 is a conventional flowmeter or a flow sensor.

The valve body 51 can be an electromagnetic valve, when detergent needs to be put in, the control valve 41 is closed firstly, clean water stops flowing into the bypass 4, then the air pump and the valve body 51 are opened simultaneously, the air pump pressurizes the storage box 6, the detergent is pushed by pressure to flow through the valve body 51 and the putting passage 5 and enter the bypass 4, after the putting amount of the detergent reaches a preset amount, the air pump and the valve body 51 are closed, then the control valve 41 is opened, the clean water flows into the bypass 4 again, and the detergent put into the bypass 4 is driven to flow through the backflow passage 8 and enter the washing barrel 2, so that the putting of the detergent is realized;

the valve body 51 can be a one-way valve, and is used for limiting the flow direction of the liquid substance in the feeding passage 5, so that the detergent in the storage box 6 can be fed into the bypass 4, and simultaneously, the substance in the bypass 4 is prevented from flowing back into the storage box 6, and the situation that the detergent in the storage box 6 is polluted is avoided; when the valve body 51 is a check valve, the detergent is put in the same process as when the valve body 51 is an electromagnetic valve, but the check valve may be set to a normally open state.

The valve body 51 may be a switching valve, such as a three-way or multi-way switching valve, and can switch the open and close states of different passages to control the flow conditions of the different passages; the detergent is put in the same way as the valve body 51 is an electromagnetic valve, but the difference is that the electromagnetic valve controls the flow of the passage by controlling the opening and closing of the valve, and the switching valve controls the flow of the passage by switching the connection state of the valve and the pipeline.

Meanwhile, in the automatic dispensing device, the valve body 51 may also be used in a form of combining valves such as a one-way valve, an electromagnetic valve, and a switching valve, and a specific use process is substantially the same as that of each single valve, which is not described herein again.

Example 2

This embodiment provides a detergent dispensing method based on the structure of embodiment 1, including:

s1, starting the water supply device 1;

at this time, the control valve 41 may be in an open state or a closed state; when the control valve 41 is in the open state, the washing water supplied from 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; if the control valve 41 is in the closed state, the washing water supplied from the water supply device 1 flows into the washing tub 2 only through the main passage 3.

S2, closing the control valve 41 and opening the pressure supply device 7;

it should be noted that, if the valve body 51 is a check valve, the check valve is set to be in a normally open state, and only the pressure supply device 7 needs to be opened, and the valve body 51 does not need to be operated; if the valve body 51 is an electromagnetic valve or a switching valve, it is necessary to open the valve body 51 or perform a corresponding switching operation on the valve body 51 when the pressure supply device 7 is opened.

Specifically, taking the valve body 51 as a one-way valve as an example, in order to realize the feeding of the detergent and ensure the accurate control of the feeding amount of the detergent, firstly, the control valve 41 is ensured to be in a closed state, and meanwhile, the flow detection device 43 stops metering, so that the interference of the washing water on the measurement of the feeding amount of the detergent is avoided; then, the pressure supply device 7 is opened, the pressure supply device 7 pressurizes the storage tank 6, and when the pressure in the storage tank 6 reaches a pressure threshold value, the detergent in the storage tank 6 flows through the dosing passage 5 through the valve body 51 and enters the bypass 4.

S3, acquiring the accumulated fluid flow value of the flow detection device 43 in real time;

in step S2, the flow rate detector 43 restarts metering with the detergent being added, and the integrated flow rate value of the fluid from the flow rate detector 43 is acquired in real time.

S4, judging whether the variation of the accumulated fluid flow reaches a preset value; if yes, go to step S5; otherwise, returning to step S3;

after the pressure supply device 7 is started, whether the variation of the accumulated fluid flow after the pressure supply device 7 is started reaches a preset value is judged through the accumulated fluid flow value obtained in step S3 in real time; if yes, it indicates that the detergent has reached the preset amount to be put in, and the subsequent step S5 may be continued; if not, the detergent does not reach the preset adding amount, and the adding is still needed.

S5, closing the pressure supply device 7 and opening the control valve 41;

it should be noted that, if the valve body 51 is a check valve, the check valve is set to be in a normally open state, only the pressure supply device 7 needs to be closed, the valve body 51 does not need to be operated, and then the control valve 41 is opened; if the valve body 51 is an electromagnetic valve or a switching valve, the pressure supply device 7 needs to be closed, the valve body 51 is closed or the valve body 51 is correspondingly switched, and then the control valve 41 is opened.

Specifically, taking the valve body 51 as a one-way valve as an example, through the detection and determination of step S4, when the detergent reaches the preset dosing amount, the pressure supply device 7 may be closed, so that the dosing of the detergent is stopped; then, the control valve 41 is opened, and the washing water flows into the bypass 4, and the washing agent is driven to flow through the return passage 8 and is put into the washing tub 2.

And S6, closing the water supply device 1.

As in the conventional arrangement or the conventional recognition, when the amount of water supplied into the washing tub 2 reaches a predetermined amount of water, or the water supply time reaches a predetermined time, the water supply device 1 is turned off and the water supply is stopped.

Thus, in the present embodiment, by providing the bypass 4 in the main passage 3, the detergent in the storage tank 6 is fed to the bypass 4 by the pressure supply device 7 in cooperation with the control valve 41 and the flow rate detection device 43, so that the feeding amount of the detergent can be accurately controlled; in addition, supply pressure device 7 to provide power for the input of detergent in this embodiment, saved the venturi negative pressure device that adopts usually among the prior art, not only reduced the degree of difficulty of pipeline assembly, simplified the structure of automatic input device moreover to a certain extent, be convenient for automatic input device's processing and assembly are favorable to reduction in production cost.

Example 3

Considering that the daily detergent is viscous, the detergent is mixed and diluted with the washing water in the bypass 4 and the return passage 8, which may cause insufficient dilution of the detergent and affect the feeding of the detergent, and in order to sufficiently dilute the detergent, as shown in fig. 1, the present embodiment is configured by corresponding changes on the basis of embodiment 1 or embodiment 2; the automatic dosing device comprises a liquid collecting cavity 42, the outlet of the bypass 4 is communicated with the inlet of the return passage 8 through the liquid collecting cavity 42, namely, the liquid collecting cavity 42 is respectively connected with the bypass 4 and the return passage 8, and a relatively large liquid storing space is provided, so that after the detergent put into the bypass 4 is fully diluted in the liquid collecting cavity 42, then flows into the return passage 8, the flow rate is detected by the flow rate detecting device 43 on the return passage 8, thereby avoiding the situations that the reading of the flow detection device 43 is unstable, the reading is wrong or the flow detection device 43 is blocked and the like caused by the fact that the viscous washing agent directly flows through the flow detection device 43, thereby being beneficial to protecting the flow detection device 43, and ensuring the accuracy and the stability of the reading of the flow detection device 43 after the automatic feeding device is used for a plurality of times.

At the same time, as shown in fig. 2, the storage box 6 may also be connected to the liquid collection chamber 42 through the feeding passage 5, so that the detergent fed in the storage box 6 directly enters the liquid collection chamber 42 without passing through the bypass 4.

As in embodiment 1 or embodiment 2, the valve body 51 includes at least one of a check valve, an electromagnetic valve, and a switching valve.

Example 4

Considering that a plurality of detergents are often used in daily washing equipment, in order to facilitate daily use and operation of a user and avoid mutual pollution among different detergents, as shown in fig. 3, the embodiment is implemented by correspondingly changing the structure on the basis of any one of embodiments 1-3; the automatic dispensing device comprises at least two storage boxes 6;

specifically, taking the example that the automatic dispensing device includes two storage boxes 6, which are a first box 6a and a second box 6b respectively; correspondingly, the throwing channel 5 comprises a first channel 5a and a second channel 5b which are independent from each other, between the control valve 41 and the return channel 8, the first box body 6a is communicated with the bypass 4 or the liquid collecting cavity 42 through the first channel 5a, and the second box body 6b is communicated with the bypass 4 or the liquid collecting cavity 42 through the second channel 5 b; the valve body 51 includes a first check valve 51a and a second check valve 51b, the first check valve 51a is disposed on the first passage 5a, and the second check valve 51b is disposed on the second passage 5 b.

The pressure supply device 7 comprises a first air pump 71a and a second air pump 71b, the first box body 6a is connected with the first air pump 71a, and the second box body 6b is connected with the second air pump 71 b.

Specifically, when the detergent is put in, if the detergent stored in the first box body 6a needs to be used, the detergent in the first box body 6a can be put in only by closing the control valve 41, then opening the first air pump 71a and keeping the second air pump 71b closed; if the detergent stored in the second box 6b needs to be used, the detergent in the second box 6b can be put in only by closing the control valve 41 and then opening the second air pump 71b and keeping the first air pump 71a closed. If the detergent reaches the preset input amount, the detergent can be input into the washing tub 2 by only closing the corresponding air pump and then opening the control valve 41.

Example 5

In order to further control the feeding processes of different detergents, as shown in fig. 4, the present embodiment performs corresponding structure changes based on embodiment 4; the bypass 4 is provided with at least two control valves 41, and the control valves 41 correspond to the storage boxes 6 one by one;

specifically, taking the example that the automatic dispensing device includes two storage boxes 6, the bypass 4 is provided with a first control valve 41a and a second control valve 41 b; between the first control valve 41a and the second control valve 41b, the first cartridge 6a communicates with the bypass 4 through the first passage 5 a; between the second control valve 41b and the return passage 8, the second cartridge 6b communicates with the bypass 4 or the liquid collection chamber 42 through the second passage 5 b; specifically, the outlet of the first control valve 41a communicates with the outlet of the first check valve 51a and the inlet of the second control valve 41b, and the outlet of the second control valve 41b communicates with the outlet of the second check valve 51 b.

Specifically, when the detergent is put in, if the detergent stored in the first box body 6a needs to be used, the detergent in the first box body 6a can be put in only by closing the first control valve 41a, keeping the second control valve 41b open, then opening the first air pump 71a, and keeping the second air pump 71b closed; if the detergent stored in the second box 6b needs to be used, the detergent in the second box 6b can be put in only by closing the second control valve 41b and then opening the second air pump 71b and keeping the first air pump 71a closed. If the detergent reaches the preset input amount, the detergent can be input into the washing tub 2 by only closing the corresponding air pump and then opening the first control valve 41a and the second control valve 41 b.

Example 6

As shown in fig. 5, the present embodiment performs corresponding changes of the structure on the basis of embodiment 4; 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 three-way switching device 72, and the three-way switching device 72 is respectively connected with the first box body 6a and the second box body 6 b; specifically, the air pump 71 is connected to an inlet of a three-way switching device 72, and an outlet of the three-way switching device 72 is connected to the first box 6a and the second box 6b, respectively.

Specifically, when the detergent is put in, if the detergent stored in the first box body 6a needs to be used, the control valve 41 is only needed to be closed, then the three-way switching device 72 is switched to be communicated with the first box body 6a, and the air pump 71 is started, so that the detergent in the first box body 6a can be put in; if the detergent stored in the second box body 6b needs to be used, the detergent in the second box body 6b can be put in only by closing the control valve 41, switching the three-way switching device 72 to be communicated with the second box body 6b and starting the air pump 71. If the detergent reaches the preset amount, the air pump 71 is turned off, and then the control valve 41 is turned on, so that the detergent can be put into the washing tub 2.

Example 7

As shown in fig. 6, the present embodiment performs corresponding changes of the structure on the basis of embodiment 5; 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 three-way switching device 72, and the three-way switching device 72 is respectively connected with the first box body 6a and the second box body 6 b; specifically, the air pump 71 is connected to an inlet of a three-way switching device 72, and an outlet of the three-way switching device 72 is connected to the first box 6a and the second box 6b, respectively.

Specifically, when the detergent is put in, if the detergent stored in the first box body 6a needs to be used, the detergent in the first box body 6a can be put in only by closing the first control valve 41a, keeping the second control valve 41b open, switching the three-way switching device 72 to be communicated with the first box body 6a and starting the air pump 71; if the detergent stored in the second box 6b needs to be used, the detergent in the second box 6b can be put in only by closing the second control valve 41b, then opening the second air pump 71b, then switching the three-way switching device 72 to communicate with the second box 6b, and then opening the air pump 71. If the detergent reaches the preset amount, the air pump 71 is turned off, and then the first control valve 41a and the second control valve 41b are both opened, so that the detergent can be put into the washing tub 2.

Example 8

The present embodiment is modified on the basis of the structure of any one of embodiments 4 to 7, specifically, the present embodiment may be the same as any one of embodiments 4 to 7, but is different from embodiments 4 to 7 in that the valve body 51 includes a first electromagnetic valve and a second electromagnetic valve, the first passage 5a is provided with the first electromagnetic valve, and the second passage 5b is provided with the second electromagnetic valve; it can be considered that the first check valve 51a in the embodiment 4-7 is replaced with a first electromagnetic valve, and the second check valve 51b in the embodiment 4-7 is replaced with a second electromagnetic valve; preferably, the first solenoid valve and the second solenoid valve are normally closed.

Specifically, in the process of putting the detergent stored in the first box body 6a, when the pressure supply device 7 needs to be opened, the first electromagnetic valve is opened, and then after the detergent reaches the preset putting amount, when the pressure supply device 7 is closed, the first electromagnetic valve is also closed; in addition, the operation process of the rest of the components including the pressure supply device 7 is the same as that of any one of the embodiments 4 to 7, and the description is omitted;

similarly, when the detergent stored in the second box body 6b is put in, the second electromagnetic valve is opened when the pressure supply device 7 is opened, and then the second electromagnetic valve is closed when the pressure supply device 7 is closed after the detergent reaches the preset putting amount; in addition, the operation processes of the remaining components including the pressure supply device 7 are the same as those in any of embodiments 4 to 7, and are not described herein again.

Example 9

As shown in fig. 7-8, this embodiment is modified based on the structure of any embodiment in embodiments 4-7, specifically, this embodiment may be the same as any embodiment in embodiments 4-7, but is different from embodiments 4-7 in that the valve body 51 is a three-way switching valve, the inlet of the valve body 51 is respectively communicated with the first box 6a and the second box 6b, and the outlet of the valve body 51 is communicated with the bypass 4 through the throwing channel 5; meanwhile, only one control valve 41 is arranged on the bypass 4, and the outlet of the throwing channel 5 is communicated with the outlet of the control valve 41;

preferably, the valve body 51 is a three-way valve structure with a conventional switching function, and has at least three switching states, including: a first switching state (a state in which only the first container 6a is communicated with the charging passage 5), a second switching state (a state in which only the second container 6b is communicated with the charging passage 5), and a third switching state (a state in which neither the first container 6a nor the second container 6b is communicated with the charging passage 5); and the third switching state of the valve body 51 is the normal state of the valve body 51.

Specifically, in the process of putting the detergent stored in the first box body 6a, when the pressure supply device 7 needs to be opened, the valve body 51 is switched to a first switching state, and then after the detergent reaches a preset putting amount, when the pressure supply device 7 is closed, the valve body 51 is switched to a third switching state; in addition, the operation process of the rest of the components including the pressure supply device 7 is the same as that of any one of the embodiments 4 to 7, and the description is omitted;

similarly, when the detergent stored in the second box 6b is put in, the valve body 51 needs to be switched to the second switching state when the pressure supply device 7 is opened, and then the valve body 51 is switched to the third switching state when the pressure supply device 7 is closed after the detergent reaches the preset putting amount; in addition, the operation processes of the remaining components including the pressure supply device 7 are the same as those in any of embodiments 4 to 7, and are not described herein again.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. An automatic detergent feeding device, which is respectively communicated with a water supply device (1) and a washing tub (2), is characterized in that the automatic detergent feeding device comprises a main passage (3), a bypass (4), a backflow passage (8) and at least one storage box (6), wherein the main passage (3) is communicated with the water supply device (1) and the 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); be provided with at least one control valve (41) on bypass (4), storage box (6) are through puting in passageway (5) and bypass (4) intercommunication, the export of puting in passageway (5) and the export intercommunication of control valve (41), storage box (6) are connected with pressure supply device (7), set up valve body (51) on puting in passageway (5), be provided with flow detection device (43) on backward flow passageway (8).

2. An automatic detergent dispensing device as claimed in claim 1, wherein said valve body (51) comprises at least one of a one-way valve, a solenoid valve and a switching valve.

3. An automatic dosing device for detergent as claimed in claim 1, characterized in that it comprises a collecting chamber (42), the outlet of said bypass (4) being in communication with the inlet of said return channel (8) through said collecting chamber (42).

4. An automatic dispensing device for washing agents, as claimed in claim 3, characterized in that said storage box (6) is connected to the collecting chamber (42) through a dispensing passage (5).

5. An automatic detergent dispensing device as claimed in claim 3, characterized in that said storage box (6) comprises a first box (6a), a second box (6 b); the throwing path (5) comprises a first path (5a) and a second path (5 b); the first box body (6a) is communicated with the bypass (4) or the liquid collecting cavity (42) through a first passage (5 a); the second box body (6b) is communicated with the bypass (4) or the liquid collecting cavity (42) through a second passage (5 b); 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 (5 b).

6. An automatic detergent dispensing device as claimed in claim 5, characterized in that said control valve (41) comprises a first control valve (41a) and a second control valve (41b), the outlet of said first control valve (41a) is connected to the outlet of a first one-way valve (51a) and the inlet of said second control valve (41b), and the outlet of said second control valve (41b) is connected to the outlet of a second one-way valve (51 b).

7. The automatic dispensing device of detergent according to claim 1, characterized in that said storage box (6) comprises a first box (6a), a second box (6 b); the valve body (51) is a three-way switching valve, an inlet of the valve body (51) is communicated with the first box body (6a) and the second box body (6b) respectively, and an outlet of the valve body (51) is communicated with the bypass (4) through the throwing passage (5).

8. An automatic dispensing device for washing agents, according to any of claims 5 to 7, characterized in that said pressure supply means (7) comprise a first air pump (71a) and a second air pump (71b), said first air pump (71a) being connected to said first container (6a) and said second air pump (71b) being connected to said second container (6 b).

9. An automatic dispensing device for washing agents, according to any of claims 5-7, characterized in that said pressure supply means (7) comprises an air pump (71) and a three-way switch (72), said air pump (71) being connected to the inlet of said three-way switch (72), the outlet of said three-way switch (72) being connected to said first container (6a) and said second container (6b), respectively.

10. A method for automatically dispensing a detergent, the method comprising:

s1, starting the water supply device (1);

s2, closing the control valve (41) and opening the pressure supply device (7);

s3, acquiring the accumulated fluid flow of the flow detection device (43) in real time;

s4, judging whether the variation of the accumulated fluid flow reaches a preset value; if yes, go to step S5; otherwise, returning to step S3;

s5, closing the pressure supply device (7) and opening the control valve (41);

and S6, closing the water supply device (1).

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