Device and method for automatically dispensing cleaning agent

Abstract

The present invention discloses a device and method for automatically dispensing detergent, wherein a liquid storage chamber, a liquid extraction chamber, a water chamber and a control panel are provided on the device body, wherein a one-way liquid inlet valve is provided at the connection point between the liquid extraction chamber and the liquid storage chamber, a one-way liquid outlet valve is provided at the connection point between the liquid extraction chamber and the water chamber, a generator is provided in the water chamber, the generator is electrically connected to the control panel, a compression chamber opening is also provided on the liquid extraction chamber, the compression chamber opening is sealed and covered with a membrane cover, an electric push rod is provided at the corresponding membrane cover of the device body, and the electric push rod is electrically connected to the control panel; an automatic detergent dispensing system and an automatic detergent dispensing method are combined with an automatic detergent dispensing device to realize water inlet through an external water inlet pipe once, and the automatic detergent dispensing device dispenses a certain amount of detergent into the water flowing into the external water inlet pipe according to the setting, and the setting of the water flow switch can control the working times of the electric push rod, that is, the times of injecting detergent into the water chamber, so as to realize automatic dispensing and quantitative dispensing of detergent.

Description

Technical Field

[0001] The present invention and the technical field of bathrooms specifically relate to a device and method for automatically delivering a cleaning agent. Background Art

[0002] The water in the water tank of a flush toilet comes from the tap water pipe. Although most of the dirt can be removed after flushing, over time, the toilet ring will be left with dirt and odor that are difficult to remove. In daily life, in order to achieve a better cleaning effect on the toilet, people usually use toilet cleaners. A little detergent is added to the water every time the toilet is flushed to help remove the odor and avoid the gradual accumulation of dirt. The most commonly used one is the toilet cleaner, which can quickly and effectively decompose the stubborn stains in the toilet bowl without the need for laborious scrubbing. It has a bactericidal effect and can kill the bacteria hidden in the basin while cleaning. However, water is added to the water tank every time the toilet is flushed. Since the toilet cleaner is always soaked in water, the different frequencies of use of the toilet will result in different contents of detergent in the water flow discharged each time. In particular, at the end, the effective ingredients of the toilet cleaner in the toilet tank will gradually decrease. At the same time, the toilet cleaner will continue to dissolve in the water, resulting in a waste of the toilet cleaner, which seriously affects the effectiveness of the toilet cleaner and fails to achieve a good cleaning effect.

[0003] There are also external detergent dispensing devices on the current market, but they all need to rely on manual pressing once to put the detergent into the toilet tank, which is very inconvenient to operate and easy to forget. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for automatically dispensing a cleaning agent, so as to solve the problems in the above-mentioned background technology that the existing toilet cleaning agent dispensing is ineffective and wasteful, and manual dispensing is inconvenient and easy to forget.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a device for automatically dispensing detergent, comprising a device body, wherein the device body is provided with a liquid storage chamber for storing detergent, a liquid extraction chamber connected to the liquid storage chamber, a water chamber connected to the liquid extraction chamber, and a control panel, wherein the liquid extraction chamber is provided with a one-way liquid inlet valve at the connection with the liquid storage chamber, and the liquid extraction chamber is provided with a one-way liquid outlet valve at the connection with the water chamber, a water inlet and a water outlet are provided on the cavity wall of the water cavity, the water cavity is connected to an external water inlet pipe through the water inlet, and the water cavity is also connected to an external application device through the water outlet for water supply, a generator that generates electricity by water flow is provided at the corresponding water inlet in the water cavity, the generator is electrically connected to the control panel, a compression cavity port is also opened on the cavity wall of the liquid extraction chamber, the compression cavity port is sealed and covered with a membrane cover that can be deformed by compression, an electric push rod that can retract and squeeze the membrane cover to compress the space in the liquid extraction chamber is provided at the corresponding membrane cover of the device body, and the electric push rod is electrically connected to the control panel.

[0006] Compared with the prior art, the advantages of the automatic detergent dispensing device are as follows: the automatic detergent dispensing device is externally connected to the external water inlet pipe, and combines the generator that relies on water flow to generate electricity with the electric push rod, the one-way liquid extraction valve in the liquid extraction chamber, and the one-way liquid outlet valve to automatically complete the work of the liquid extraction chamber extracting a certain amount of cleaning liquid from the liquid storage chamber and dispensing the cleaning liquid in the liquid extraction chamber into the water. Applying the automatic detergent dispensing device to the toilet can complete the automatic quantitative dispensing of toilet detergent, replacing manual dispensing while ensuring the effectiveness of detergent dispensing.

[0007] Preferably, a liquid outlet and a liquid inlet for adding cleaning agent into the liquid storage chamber are provided on the cavity wall of the liquid storage chamber, a liquid suction inlet and a liquid suction outlet are provided on the cavity wall of the liquid pumping chamber, and a liquid inlet is also provided on the cavity wall of the water chamber. The liquid storage chamber and the liquid pumping chamber are connected with each other through the liquid outlet and the liquid suction inlet, and the liquid pumping chamber and the water chamber are connected with each other through the liquid suction outlet and the liquid inlet. The one-way liquid inlet valve is arranged at the liquid suction inlet according to the direction of the cleaning agent flowing from the liquid storage chamber to the liquid pumping chamber, and the one-way liquid outlet valve is arranged at the liquid suction outlet according to the direction of the cleaning agent flowing from the liquid pumping chamber to the water chamber.

[0008] Preferably, a sealing ring is threadedly connected to the corresponding membrane cover on the compression chamber opening, thereby ensuring a sealed connection between the membrane cover and the compression chamber opening.

[0009] Preferably, a supporting spring is provided in the liquid extraction cavity corresponding to the membrane cover, which not only assists the membrane cover in restoring its deformation, but also protects the membrane cover, avoids deformation and damage of the membrane cover, and prolongs the service life of the membrane cover.

[0010] The control panel is electrically connected with a water flow switch, a rectifier module, and a power storage module. The generator is electrically connected to the rectifier module, the rectifier module is electrically connected to the power storage module, the power storage module is electrically connected to the electric push rod, and the water flow switch is electrically connected between the power storage module and the electric push rod.

[0011] Preferably, the control board is also connected to an overcharge protection module, which is electrically connected to the power storage module, so that when the capacitor is fully charged but not discharged, the overcharge protection module protects the capacitor and extends the service life of the capacitor.

[0012] Preferably, the rectifier module includes a current conversion circuit and a voltage stabilizing circuit for converting the alternating current generated by the generator into direct current, the power storage module includes a capacitor, the overcharge protection module includes an overcharge protection circuit, and the voltage stabilizing circuit charges the capacitor continuously and stably.

[0013] A method for automatically dispensing a cleaning agent, using any of the above-mentioned devices for automatically dispensing a cleaning agent, comprises the following steps:

[0014] Step 1: Connect the water inlet of the automatic detergent delivery device to the external water inlet pipe, and connect the water outlet to the application equipment through a pipeline;

[0015] Step 2: Water starts to flow into the external water inlet pipe, and the water flows into the water cavity from the water inlet. The generator in the water cavity generates electricity by relying on the water flow;

[0016] Step 3: The rectifier module converts the AC power generated by the generator into DC power, and then charges the capacitor;

[0017] Step 4: When the capacitor is fully charged, the control board determines the number of times the water flow switch is turned on; if the number of times the water flow switch is turned on is less than the preset number N, then go to step 5; otherwise, go to step 7;

[0018] Step 5: The control panel controls the water flow switch to turn on, the capacitor supplies power to the electric push rod, the electric push rod is powered and extends out of the extrusion membrane cover, the space in the pumping chamber is compressed, the one-way liquid inlet valve closes the pumping inlet, the one-way liquid outlet valve opens the pumping outlet, and the detergent in the pumping chamber is squeezed into the water chamber and enters the application equipment along with the water flow;

[0019] Step 6: After the capacitor discharge is completed, the control board turns off the water flow switch, the electric push rod retracts, the membrane cover recovers its deformation under the action of its own characteristics and the supporting spring, the space in the liquid extraction chamber expands, the one-way liquid inlet valve opens the liquid extraction inlet to extract the detergent from the liquid storage chamber, and at the same time, the one-way liquid outlet valve closes the liquid extraction outlet;

[0020] Step 7: The control board controls the water flow switch to close, and the overcharge protection circuit protects the capacitor;

[0021] Step 8: When the water inlet pipe is finished, the number of times the water flow switch is turned on as counted by the control panel is reset to zero.

[0022] Preferably, the water flow switch is preset to have a number of opening times N≥1.

[0023] Compared with the prior art, the advantage of the automatic detergent dispensing method is that, combined with the automatic detergent dispensing device, the present invention can realize water intake through the external water inlet pipe once, and the automatic detergent dispensing device dispenses a quantitative amount of detergent into the water flowing into the external water inlet pipe according to the setting. The setting of the water flow switch can control the working times of the electric push rod, that is, the number of times the detergent is injected into the water chamber, thereby realizing automatic and quantitative dispensing of the detergent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of specific embodiment 1;

[0025] Figure 2 is an exploded view of specific embodiment 1;

[0026] Figure 3 is a cross-sectional schematic diagram of specific embodiment 1;

[0027] Figure 4 This is a module diagram on the control board of specific embodiment 1.

[0028] In the figure: 1. device body; 2. liquid storage chamber; 201. liquid outlet; 202. liquid inlet; 3. liquid extraction chamber; 301. compression chamber port; 302. liquid extraction inlet; 303. liquid extraction outlet; 4. water chamber; 401. water inlet; 402. water outlet; 403. liquid inlet; 5. control board; 6. one-way liquid inlet valve; 7. one-way liquid outlet valve; 8. generator; 9. membrane cover; 10. electric push rod; 11. sealing ring; 12. support spring; 13. water flow switch; 14. rectifier module; 1401. current conversion circuit; 1402. voltage stabilizing circuit; 15. power storage module; 1501. capacitor; 16. overcharge protection module; 1601. overcharge protection circuit. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Specific embodiment 1

[0031] See also Figure 1-3, a device for automatically dispensing detergent, comprising a device body 1, on which is provided a liquid storage chamber 2 for storing detergent, a liquid extraction chamber 3 communicating with the liquid storage chamber 2 and extracting detergent from the liquid storage chamber 2, a liquid extraction chamber 3 communicating with the liquid extraction chamber 3 and receiving the detergent from the liquid extraction chamber 3, and a control panel 5, a water inlet 401 and a water outlet 402 are provided on the cavity wall of the water cavity 4, the water inlet 401 of the water cavity 4 is connected to an external water inlet pipe for water intake, and the water outlet 402 of the water cavity 4 is connected to an external application device through a pipeline for water supply, and in order to prevent the wanton flow of detergent between the liquid storage chamber 2, the liquid extraction chamber 3, and the water cavity 4, and more importantly, in order to enable the liquid extraction chamber 3 to smoothly extract detergent from the liquid storage chamber 2, a one-way liquid inlet valve 6 is provided at the connection between the liquid extraction chamber 3 and the liquid storage chamber 2, and the one-way liquid inlet valve 6 is provided. The valve 6 is arranged according to the flow direction of the detergent in the liquid storage chamber 2 flowing into the liquid extraction chamber 3 in one direction. At the same time, the liquid extraction chamber 3 is provided with a one-way liquid outlet valve 7 at the connection point with the water chamber 4. The one-way liquid outlet valve 7 is arranged according to the one-way flow direction of the detergent from the liquid extraction chamber 3 to the water chamber 4. Then, in order to realize that the liquid extraction chamber 3 extracts the detergent from the liquid storage chamber 2, a compression cavity port 301 is opened on the cavity wall of the liquid extraction chamber 3. The compression cavity port 301 is sealed and covered with a membrane cover 9 that can be deformed by compression. When the membrane cover 9 is squeezed, the space in the liquid extraction chamber 3 is compressed, and the one-way liquid outlet valve 7 opens due to the pressure difference in the space, and the detergent in the liquid extraction chamber 3 naturally flows into the water chamber 4 from the one-way liquid outlet valve 7. Then, after the membrane cover 9 recovers its deformation, the space in the liquid extraction chamber 3 expands, and the one-way liquid outlet valve 7 is closed while the one-way liquid inlet valve 6 It opens due to the pressure difference in space, and then the cleaning agent is extracted from the liquid storage chamber 2; then, in order to realize automatic extraction and discharge of the cleaning agent from the pumping chamber 3, an electric push rod 10 is provided at the corresponding membrane cover 9 of the device body 1. The extension of the electric push rod 10 squeezes the membrane cover 9, and the contraction releases the membrane cover 9, so as to achieve automatic extraction and discharge of the liquid pumping chamber 3; in addition, in order to connect the automatic extraction and discharge of the cleaning agent from the pumping chamber 3 with each water inlet action of the external water inlet pipe, a generator 8 that generates electricity by water flow is provided at the corresponding water inlet 401 in the water chamber 4. This specific embodiment adopts a turbine generator 8, and the generator 8 is electrically connected to the control board 5, and the control board 5 is electrically connected to the electric push rod 10. Therefore, when water is inletted from the external water inlet pipe, the generator 8 generates electricity by water flow to provide power, and the control board 5 controls the extension and retraction of the electric push rod 10 to realize the automatic extraction and discharge of the cleaning agent from the pumping chamber 3.

[0032] Specifically, a liquid outlet 201 and a liquid inlet 202 for adding cleaning agent into the liquid storage chamber 2 are provided on the cavity wall of the liquid storage chamber 2, a liquid extraction inlet 302 and a liquid extraction outlet 303 are provided on the cavity wall of the liquid extraction chamber 3, a liquid inlet 403 is provided on the cavity wall of the water chamber 4, the liquid storage chamber 2 and the liquid extraction chamber 3 are connected to each other through the liquid outlet 201 and the liquid extraction inlet 302, the liquid extraction chamber 3 and the water chamber 4 are connected to each other through the liquid extraction outlet 303 and the liquid inlet 403, and the liquid extraction chamber and the water chamber 4 are connected to each other through the liquid extraction outlet 303 and the liquid inlet 403.

[0033] The pumping chamber 3 is integrally provided with a first valve chamber corresponding to the pumping inlet 302, and a second valve chamber is integrally provided at the pumping chamber 3 corresponding to the pumping outlet 303. The one-way liquid inlet valve 6 and the one-way liquid outlet valve 7 both include a valve body and a valve spring, wherein the valve body of the one-way liquid inlet valve 6 is docked with the pumping inlet 302, one end of the valve spring of the one-way liquid inlet valve 6 is against the end of the first valve chamber, and the other end is against the valve spring, so that when the pumping chamber 3 expands in space, the one-way liquid inlet valve 6 is opened due to the pressure difference, and then in the space After the pressure difference is balanced, the one-way liquid inlet valve 6 closes the liquid extraction inlet 302 with the assistance of the valve spring; the valve body of the one-way liquid outlet valve 7 is docked and matched with the liquid extraction outlet 303, and one end of the valve spring of the one-way liquid outlet valve 7 is against the second valve cavity, and the other end is against the valve body of the one-way liquid outlet valve 7, so that the one-way liquid outlet valve 7 is opened due to the spatial pressure difference when the space of the liquid extraction cavity 3 is compressed and the detergent is squeezed into the water cavity 4, and then after the spatial pressure difference is balanced, the cavity mouth of the second valve cavity is closed with the assistance of the valve spring of the one-way liquid outlet valve 7.

[0034] In addition, a sealing ring 11 is threadedly connected to the corresponding membrane cover 9 on the compression chamber port 301, thereby ensuring the sealed connection between the membrane cover 9 and the compression chamber port 301. A supporting spring 12 is provided corresponding to the membrane cover 9 in the liquid extraction chamber 3, which not only assists the membrane cover 9 in restoring deformation, but also protects the membrane cover 9, avoids deformation and damage of the membrane cover 9, and prolongs the service life of the membrane cover 9.

[0035] The control board 5 is electrically connected to a water flow switch 13, a rectifier module 14, and a power storage module 15. The generator 8 is electrically connected to the rectifier module 14, the rectifier module 14 is electrically connected to the power storage module 15, the power storage module 15 is electrically connected to the electric push rod 10, and the water flow switch 13 is electrically connected between the power storage module 15 and the electric push rod 10; the control board 5 is also connected to an overcharge protection module 16, which is electrically connected to the power storage module 15, so that when the power storage module 15 is fully charged but not discharged, the overcharge protection module 16 protects the power storage module 15, thereby extending the service life of the power storage module 15.

[0036] The rectifier module 14 includes a current conversion circuit 1401 and a voltage stabilizing circuit 1402 for converting the alternating current generated by the generator into direct current. The power storage module 15 includes a capacitor 1501. The overcharge protection module 16 includes an overcharge protection circuit 1601. The voltage stabilizing circuit 1402 charges the capacitor 1501 continuously and stably. Specific embodiment 2

[0038] A method for automatically dispensing a cleaning agent, combined with a device for automatically dispensing a cleaning agent, comprises the following steps:

[0039] Step 1: Connect the water inlet of the automatic detergent delivery device to the external water inlet pipe, and connect the water outlet to the application equipment through a pipeline;

[0040] Step 2: Water starts to flow into the external water inlet pipe, and the water flows into the water cavity from the water inlet. The generator in the water cavity generates electricity by relying on the water flow;

[0041] Step 3: The rectifier module converts the AC power generated by the generator into DC power, and then charges the capacitor;

[0042] Step 4: When the capacitor is fully charged, the control board determines the number of times the water flow switch is turned on; if the number of times the water flow switch is turned on is less than the preset number N, N≥1, and this specific embodiment adopts N=1, then proceed to step 5; otherwise, proceed to step 7;

[0043] Step 5: The control panel controls the water flow switch to turn on, the capacitor supplies power to the electric push rod, the electric push rod is powered and extends out of the extrusion membrane cover, the space in the pumping chamber is compressed, the one-way liquid inlet valve closes the pumping inlet, the one-way liquid outlet valve opens the pumping outlet, and the detergent in the pumping chamber is squeezed into the water chamber and enters the application equipment along with the water flow;

[0044] Step 6: After the capacitor discharge is completed, the control board turns off the water flow switch, the electric push rod retracts, the membrane cover recovers its deformation under the action of its own characteristics and the supporting spring, the space in the liquid extraction chamber expands, the one-way liquid inlet valve opens the liquid extraction inlet to extract the detergent from the liquid storage chamber, and at the same time, the one-way liquid outlet valve closes the liquid extraction outlet;

[0045] Step 7: The control board controls the water flow switch to close, and the overcharge protection circuit protects the capacitor;

[0046] Step 8: When the water inlet pipe is finished, the number of times the water flow switch is turned on as counted by the control panel is reset to zero.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for automatically dispensing a cleaning agent, characterized in that: A device for automatically dispensing a cleaning agent, the device comprising a device body (1), the device body (1) being provided with a liquid storage chamber (2) for storing the cleaning agent, a liquid extraction chamber (3) connected to the liquid storage chamber (2), a water chamber (4) connected to the liquid extraction chamber (3), and a control panel (5), wherein the liquid extraction chamber (3) is provided with a one-way liquid inlet valve (6) at a point where it is connected to the liquid storage chamber (2), and the liquid extraction chamber (3) is provided with a one-way liquid outlet valve at a point where it is connected to the water chamber (4). (7), a water inlet (401) and a water outlet (402) are provided on the wall of the water chamber (4), the water chamber (4) is connected to an external water inlet pipe through the water inlet (401), and the water chamber (4) is also connected to an external application device for water supply through the water outlet (402), a generator (8) for generating electricity by water flow is provided in the water chamber (4) at a position corresponding to the water inlet (401), the generator (8) is electrically connected to the control board (5), and the wall of the liquid extraction chamber (3) is also provided with a water inlet (401). A compression cavity opening (301) is provided, and the compression cavity opening (301) is sealed and covered with a membrane cover (9) that can be deformed by compression. The device body (1) is provided with an electric push rod (10) that can retract and squeeze the membrane cover (9) to compress the space inside the liquid extraction cavity (3), and the electric push rod (10) is electrically connected to the control panel (5); a liquid outlet (201) and a cleaning agent for adding cleaning agent to the liquid storage cavity (2) are provided on the cavity wall of the liquid storage cavity (2). A liquid inlet (202), a liquid extraction inlet (302) and a liquid extraction outlet (303) are provided on the wall of the liquid extraction chamber (3); the control board (5) is electrically connected to a water flow switch (13), a rectifier module (14), and an electricity storage module (15); the control board (5) is also connected to an overcharge protection module (16); the electricity storage module (15) comprises a capacitor (1501), and the overcharge protection module (16) comprises an overcharge protection circuit (1601); The steps include: Step 1: Connect the water inlet of the automatic detergent delivery device to the external water inlet pipe, and connect the water outlet to the application equipment through a pipeline; Step 2: Water starts to flow into the external water inlet pipe, and the water flows into the water cavity from the water inlet. The generator in the water cavity generates electricity by relying on the water flow; Step 3: The rectifier module converts the AC power generated by the generator into DC power, and then charges the capacitor; Step 4: When the capacitor is fully charged, the control board determines the number of times the water flow switch is turned on; if the number of times the water flow switch is turned on is less than the preset number N, then go to step 5; otherwise, go to step 7; Step 5: The control panel controls the water flow switch to turn on, the capacitor supplies power to the electric push rod, the electric push rod is powered and extends out of the extrusion membrane cover, the space in the pumping chamber is compressed, the one-way liquid inlet valve closes the pumping inlet, the one-way liquid outlet valve opens the pumping outlet, and the detergent in the pumping chamber is squeezed into the water chamber and enters the application equipment along with the water flow; Step 6: After the capacitor discharge is completed, the control board turns off the water flow switch, the electric push rod retracts, the membrane cover recovers its deformation under the action of its own characteristics and the supporting spring, the space in the liquid extraction chamber expands, the one-way liquid inlet valve opens the liquid extraction inlet to extract the detergent from the liquid storage chamber, and at the same time, the one-way liquid outlet valve closes the liquid extraction outlet; Step 7: The control board controls the water flow switch to close, and the overcharge protection circuit protects the capacitor; Step 8: When the water inlet pipe is finished, the number of times the water flow switch is turned on as counted by the control panel is reset to zero.

2. The automatic detergent delivery method according to claim 1, characterized in that: A liquid inlet (403) is also provided on the wall of the water chamber (4); the liquid storage chamber (2) and the liquid extraction chamber (3) are connected to each other via the liquid outlet (201) and the liquid extraction inlet (302); the liquid extraction chamber (3) and the water chamber (4) are connected to each other via the liquid extraction outlet (303) and the liquid inlet (403); the one-way liquid inlet valve (6) is arranged at the liquid extraction inlet (302) according to the direction in which the cleaning agent flows from the liquid storage chamber (2) to the liquid extraction chamber (3); and the one-way liquid outlet valve (7) is arranged at the liquid extraction outlet (303) according to the direction in which the cleaning agent flows from the liquid extraction chamber (3) to the water chamber (4).

3. The automatic detergent delivery method according to claim 1, characterized in that: A sealing ring (11) is threadedly connected to the corresponding membrane cover (9) on the compression cavity opening (301).

4. The automatic detergent delivery method according to claim 1, characterized in that: A supporting spring (12) is provided in the liquid extraction chamber (3) corresponding to the membrane cover (9).

5. The automatic detergent delivery method according to claim 1, characterized in that: The generator (8) is electrically connected to the rectifier module (14), the rectifier module (14) is electrically connected to the power storage module (15), the power storage module (15) is electrically connected to the electric push rod (10), and the water flow switch (13) is electrically connected between the power storage module (15) and the electric push rod (10).

6. The automatic detergent delivery method according to claim 5, characterized in that: The overcharge protection module (16) is electrically connected to the power storage module (15).

7. The automatic detergent delivery method according to claim 6, characterized in that: The rectifier module (14) comprises a current conversion circuit (1401) for converting the alternating current generated by the generator into direct current and a voltage stabilization circuit (1402).

8. The automatic detergent delivery method according to claim 1, characterized in that: The preset opening times of the water flow switch is N≥1.

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