CN110759546A - Water purifying device and preparation method thereof - Google Patents

Abstract

The invention provides a water purifying device and a preparation method thereof, and relates to the technical field of water purifying equipment. The water purifying device comprises a booster pump, wherein the inlet end of the booster pump is communicated with a first liquid inlet pipe and an air inlet pipe, the first liquid inlet pipe is provided with a first valve, and the air inlet pipe is provided with an air regulating valve and an air pump; a first liquid outlet and a second liquid outlet are formed in the liquid outlet end of the booster pump, and a filter element assembly and a second valve are arranged on a first liquid outlet pipe communicated with the first liquid outlet; and a second liquid outlet pipe communicated with the second liquid outlet is provided with a micro-nano bubble generator and a third valve. The using method is used for preparing purified water and micro-nano bubble water by using the water purifying device. This purifier can obtain purified water and micro-nano bubble water, and the user can select to use according to the demand of oneself, and the function is various, and the suitability is strong.

Description

Water purifying device and preparation method thereof

Technical Field

The invention relates to the technical field of water purifying equipment, in particular to a water purifying device and a preparation method thereof.

Background

The water purifier is a water purifying device which filters and purifies impurities and microorganisms in water in a filtering mode. The raw water is generally filtered and purified by the filter element assembly in the water purifier to obtain purified water, however, the existing water purifier can only obtain a water body in one form, and is single in function and poor in applicability.

Disclosure of Invention

The invention aims to provide a water purifying device and a preparation method thereof, which are used for relieving the technical problems that a water purifying machine can only obtain water in one form, and the water purifying device has a single function and is poor in applicability.

In a first aspect, an embodiment provides a water purifying device, which comprises a booster pump, wherein an inlet end of the booster pump is communicated with a first liquid inlet pipe and an air inlet pipe, the first liquid inlet pipe is provided with a first valve, and the air inlet pipe is provided with an air regulating valve and an air pump;

a first liquid outlet and a second liquid outlet are formed in the liquid outlet end of the booster pump, the first liquid outlet is communicated with a first liquid outlet pipe, and the first liquid outlet pipe is provided with a filter element assembly and a second valve; the second liquid outlet is communicated with a second liquid outlet pipe, and the second liquid outlet pipe is provided with a micro-nano bubble generator and a third valve.

In an optional embodiment, the water purifying device further comprises a second liquid inlet pipe, the inlet end of the second liquid inlet pipe is communicated with the pipe section of the first liquid inlet pipe, which is located at the upstream of the first valve, the outlet end of the second liquid inlet pipe is communicated with the inlet end of the booster pump, and a fifth valve is installed on the second liquid inlet pipe.

In an optional embodiment, the first liquid inlet pipe is provided with a pre-filter element, and the pre-filter element is positioned at the upstream of the communication position of the second liquid inlet pipe and the first liquid inlet pipe.

In an optional embodiment, the filter element assembly comprises a water inlet, a purified water outlet and a concentrated water outlet, the water inlet and the purified water outlet are communicated with the first liquid outlet pipe, and the concentrated water outlet is communicated with a fifth valve.

In an optional embodiment, the concentrated water outlet is communicated with a third liquid outlet pipe, the fifth valve is installed in the third liquid outlet pipe, and the third liquid outlet pipe is installed with a flush valve.

In an optional embodiment, the micro-nano bubble generator comprises a gas mixing tank and an aeration head, the gas mixing tank and the aeration head are both mounted on the second liquid outlet pipe, and the gas mixing tank is located upstream of the aeration head.

In an optional embodiment, the water purifying device further comprises a processor, the filter element assembly is located at the upstream of the second valve, and a high-voltage switch is installed on a pipe section of the first liquid outlet pipe located between the filter element assembly and the second valve; first liquid flowmeter is installed to the second drain pipe, first valve the booster pump gas regulating valve the air pump high pressure switch reaches first liquid flowmeter all with the treater is connected.

In optional embodiment, gas flowmeter is installed to the intake pipe, first feed liquor pipe is located first valve with second liquid flowmeter is installed to the pipeline section between the booster pump, the second drain pipe is located the booster pump with pressure sensor is installed to the pipeline section between the micro-nano bubble generator, gas flowmeter second liquid flowmeter take into account pressure sensor all with the treater is connected.

In an alternative embodiment, the water purification apparatus further comprises an alarm connected to the processor.

In a second aspect, embodiments provide a preparation method, in which purified water and micro-nano bubble water are prepared by using the water purification apparatus of any one of the foregoing embodiments:

wherein, the preparation of the purified water comprises the following steps:

closing the third valve and opening the second valve, transmitting a flow signal representing the closed state of the third valve to the processor by the first liquid flow meter, and transmitting a pressure signal representing the open state of the second valve to the processor by the high-pressure switch; the processor controls the air pump and the air regulating valve to be closed, the first valve and the booster pump to be opened, raw water enters the first liquid inlet pipe and enters the booster pump, the boosted raw water then enters the filter element assembly and is filtered by the filter element assembly to obtain purified water, and the purified water flows out of the first liquid outlet pipe;

the preparation method of the micro-nano bubble water comprises the following steps:

closing the second valve and opening the third valve, the high pressure switch transmitting a pressure signal indicative of a closed state of the second valve to the processor, the first fluid flow meter transmitting a flow signal indicative of an open state of the third valve to the processor; the processor controls the air pump, the air regulating valve, the first valve and the booster pump to be opened, and raw water enters the first liquid inlet pipe and flows into the booster pump; the air pump sucks gas to enter the air inlet pipe, and the gas flows through the air pump and the gas regulating valve, then the gas enters the booster pump, the gas entering the booster pump and the raw water form mixed fluid after the mixed pressurization of the booster pump, the mixed fluid enters the micro-nano bubble generator, and the obtained micro-nano bubble water flows out of the second liquid outlet pipe.

In an optional embodiment, in the process of preparing the micro-nano bubble water, after the processor controls and opens the air pump, the gas regulating valve, the first valve and the booster pump, the preparation process comprises gas flow regulation, liquid flow regulation and mixed fluid pressure regulation, wherein the gas flow regulation comprises the following steps:

the gas flowmeter transmits the gas flow signal to the processor, the processor compares a gas flow value represented by the received gas flow signal with a set gas flow range, and if the gas flow value is in the set gas flow range, the gas regulating valve does not need to be regulated; if the gas flow value is out of the set gas flow range, the processor adjusts the gas regulating valve, the gas flowmeter transmits the adjusted gas flow signal to the processor, the processor compares the gas flow signal again, and the process is circulated until the gas flow value is in the set gas flow range;

wherein, liquid flow regulation includes the following steps:

the second liquid flow meter transmits the liquid flow signal to the processor, the processor compares the liquid flow value represented by the received liquid flow signal with a set liquid flow range, and if the liquid flow value is in the set liquid flow range, the first valve does not need to be adjusted; if the liquid flow value is out of the set liquid flow range, the processor adjusts the first valve, the second liquid flow meter transmits the adjusted liquid flow signal to the processor, the processor compares the liquid flow signal again, and the process is circulated until the liquid flow value is in the set liquid flow range;

and after the gas flow regulation and the liquid flow regulation are finished, mixed fluid pressure regulation is carried out, wherein the mixed fluid pressure regulation comprises the following steps:

the pressure sensor transmits the detected pressure signal of the mixed fluid in the second liquid outlet pipe to the processor, the processor compares a fluid pressure value represented by the received pressure signal with a set fluid pressure range, and if the fluid pressure value is within the set fluid pressure range, the booster pump does not need to be adjusted; if the fluid pressure value is out of the set fluid pressure range, the processor adjusts the booster pump, the pressure sensor transmits the adjusted pressure signal to the processor, the processor compares the pressure signal again, and the process is circulated until the fluid pressure value is in the set fluid pressure range;

the mixed fluid enters the micro-nano bubble generator, and the obtained micro-nano bubble liquid flows out of the second liquid outlet pipe.

In an optional embodiment, the water purifying device further comprises an alarm mode when in use, the high-pressure switch transmits a pressure signal indicating that the second valve is in a closed state to the controller, the first liquid flow meter transmits a detected flow signal in the second liquid outlet pipe to the processor, and the processor compares a flow value indicated by the flow signal with a set water leakage flow range, and if the flow value is smaller than the water leakage flow range, the third valve is in the closed state;

if the flow value is in the water leakage flow range, the processor controls the opening of the alarm, and the alarm sends out an alarm signal to remind a user that the third valve has water leakage.

In an optional embodiment, when the filter element assembly comprises a concentrated water outlet which is communicated with a fifth valve, and the third liquid outlet pipe is provided with a flushing valve, in the step of preparing purified water, after the processor receives a pressure signal indicating that the second valve is opened by the high-pressure switch, the processor also controls to open the fifth valve and adjust the flushing valve to a half-open state;

in the step of preparing the micro-nano bubble water, the processor receives a flow signal indicating that the third valve is opened by the first liquid flow meter, and then the processor controls the fifth valve to be closed.

In an optional embodiment, the water purification device further comprises a flushing mode when in use, after the water purification device is used for a set time, the first liquid flow meter transmits a flow signal representing the closing state of the third valve to the processor, the high-pressure switch transmits a pressure signal representing the closing state of the second valve to the processor, the processor controls to open the first valve, the booster pump and the fifth valve and adjust the flushing valve to a full-open state, and raw water flows through the first valve, the booster pump, the filter element assembly, the flushing valve and the fifth valve and then is discharged.

In an optional embodiment, when a fourth valve is arranged in the water purification device, in the step of preparing purified water, after the processor receives a pressure signal indicating that the second valve is opened by the high-pressure switch, the processor controls to close the first valve and open the fourth valve, raw water enters the booster pump through the fourth valve and then flows into the filter element assembly to obtain purified water, and the purified water flows out of the first liquid outlet pipe;

in the step of preparing the micro-nano bubble water, after the processor receives a flow signal indicating that the third valve is opened by the first liquid flow meter, the processor controls to close the fifth valve and the fourth valve and open the first valve, raw water enters the booster pump through the first valve and then enters the micro-nano bubble generator to obtain the micro-nano bubble water, and the micro-nano bubble water flows out of the second liquid outlet pipe.

The water purifying device has the beneficial effects that:

the water purifying device provided by the invention comprises a booster pump for boosting liquid, a filter element assembly for filtering and purifying the liquid, a micro-nano bubble generator for micro-nano bubble treatment of the liquid, a first valve, a second valve and a third valve for controlling the communication state of pipelines, and an air pump for pumping external air to flow into an air inlet pipe.

This purifier is applicable to self and possesses hydraulic water source, explain for the example running water, gaseous explains for the example air, during the use, with the entrance point and the running water intercommunication of first feed liquor pipe, when needing to prepare the purified water, keep the third valve, air pump and gas control valve in the closed condition, open first valve, booster pump and second valve, the running water gets into first feed liquor pipe under self hydraulic effect, then flow into the booster pump, the booster pump carries out the pressure boost processing to the running water, rivers after the booster pump flow into the filter element group spare through the filtration purification of filter element group spare obtain the purified water, the purified water flows out first drain pipe and supplies the user to use.

When micro-nano bubble water needs to be prepared, the second valve is closed, the first valve, the air pump, the gas regulating valve and the third valve are opened, tap water enters the first liquid inlet pipe and flows into the booster pump, the air pump pumps external air to enter the air inlet pipe and flows into the booster pump, the booster pump performs mixed pressurization treatment on the tap water and the air entering the booster pump to obtain mixed fluid, the mixed fluid enters the micro-nano bubble generator to obtain micro-nano bubble water, and the micro-nano bubble water flows out of the second liquid outlet pipe to be used by a user. Wherein, first valve can adjust the feed liquor flow of running water, and gas regulating valve can adjust the air inlet flow of air, and the booster pump then can adjust the pressure boost volume of misch fluid to ensure that misch fluid satisfies the gas-liquid ratio and the water pressure requirement of preparing micro-nano bubble water, thereby obtain high-quality micro-nano bubble water.

This purifier can obtain the purified water that is suitable for to drink and the micro-nano bubble water that is suitable for washing fruit vegetables etc. the user can select according to the demand of oneself, and the function is various, and the suitability is strong.

The preparation method is used for preparing purified water or micro-nano bubble water by using the water purifying device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a first block diagram of a water purifying apparatus according to an embodiment of the present invention;

fig. 2 is a second block diagram of a water purifying apparatus provided in an embodiment of the present invention;

fig. 3 is a third block diagram of a water purifying apparatus according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of a water purifying device according to an embodiment of the present invention.

Icon: 100-a front filter element; 200-a booster pump; 300-a filter element assembly; 310-a water inlet; 320-a purified water outlet; 330-concentrated water outlet; 400-micro nano bubble generator; 410-gas mixing tank; 420-an aerator; 510-a first valve; 520-a second valve; 530-a third valve; 540-fifth valve; 550-a fourth valve; 560-gas regulating valve; 570-a flush valve; 580-check valve; 610-a first liquid flow meter; 620-a second liquid flow meter; 630-a gas flow meter; 640-a pressure sensor; 650-high voltage switch; 660-an air pump; 670-an alarm; 680-low voltage switch; 710-a first feed liquor pipe; 720-a second liquid inlet pipe; 730-a first liquid outlet pipe; 740-a second outlet pipe; 750-air inlet pipe; 760-a third outlet pipe; 800-a processor; 810-a control module; 820-PWM speed regulation module.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present embodiment provides a water purifying apparatus, as shown in fig. 1, including a booster pump 200, wherein an inlet end of the booster pump 200 is communicated with a first liquid inlet pipe 710 and an air inlet pipe 750, the first liquid inlet pipe 710 is provided with a first valve 510, and the air inlet pipe 750 is provided with an air regulating valve 560 and an air pump 660; a first liquid outlet and a second liquid outlet are arranged at the liquid outlet end of the booster pump 200, the first liquid outlet is communicated with a first liquid outlet pipe 730, and the first liquid outlet pipe 730 is provided with a filter element assembly 300 and a second valve 520; the second liquid outlet is communicated with a second liquid outlet pipe 740, and the second liquid outlet pipe 740 is provided with a micro-nano bubble generator 400 and a third valve 530.

The water purifying apparatus provided by the embodiment comprises a booster pump 200 for boosting liquid, a filter element assembly 300 for filtering and purifying liquid, a micro-nano bubble generator 400 for micro-nano bubble treatment of liquid, a first valve 510, a second valve 520 and a third valve 530 for controlling the pipeline communication state, and an air pump 660 for pumping external air into an air inlet pipe 750.

The water purifying device is suitable for a water source with water pressure, tap water is taken as an example for description, air is taken as an example for description, when the water purifying device is used, the inlet end of the first liquid inlet pipe 710 is communicated with tap water, when purified water needs to be prepared, the third valve 530, the air pump 660 and the air regulating valve 560 are kept in a closed state, the first valve 510, the booster pump 200 and the second valve 520 are opened, the tap water enters the first liquid inlet pipe 710 under the action of the water pressure of the tap water and then flows into the booster pump 200, the booster pump 200 boosts the tap water, the boosted water flow flows into the filter element assembly 300 and is filtered and purified by the filter element assembly 300 to obtain purified water, and the purified water flows out of the first liquid outlet pipe 730 for users to.

When micro-nano bubble water needs to be prepared, the second valve 520 is closed, the first valve 510, the air pump 660, the gas regulating valve 560 and the third valve 530 are opened, tap water enters the first liquid inlet pipe 710 and flows into the booster pump 200, the air pump 660 pumps external air to enter the air inlet pipe 750 and flow into the booster pump 200, the booster pump 200 performs mixed pressurization treatment on the tap water and the air entering the booster pump to obtain mixed fluid, the mixed fluid enters the micro-nano bubble generator 400 to obtain micro-nano bubble water, and the micro-nano bubble water flows out of the second liquid outlet pipe 740 to be used by a user. Wherein, first valve 510 can adjust the feed liquor flow of running water, and gas regulating valve 560 can adjust the inlet flow of air, and booster pump 200 then can adjust the pressure boost volume of fluid mixture to ensure that fluid mixture satisfies the gas-liquid ratio and the water pressure requirement of preparing micro-nano bubble water, thereby obtain high-quality micro-nano bubble water.

This purifier can obtain the purified water that is suitable for to drink and the micro-nano bubble water that is suitable for washing fruit vegetables etc. through setting up filter element subassembly 300 and micro-nano bubble generator 400, and the user can select according to the demand of oneself, and the function is various, and the suitability is strong.

Preferably, the second valve may be disposed at an end of the first outlet pipe, and the third valve may be disposed at an end of the second valve, so as to facilitate the operation of the second valve and the third valve by a user and reduce the influence of the second valve and the third valve on the flow state of the fluid in the corresponding pipeline. Alternatively, the air inlet end of the air inlet pipe 750 may be communicated with the pipe body of the first liquid inlet pipe 710, and communicated with the inlet end of the booster pump 200 through the first liquid inlet pipe 710; when micro-nano bubble water is prepared, air entering the air inlet pipe 750 firstly enters the first liquid inlet pipe 710 to be mixed with raw water therein, and then the air and the raw water flow into the booster pump 200 together.

Specifically, the micro-nano bubble generator 400 may include a gas mixing tank 410 and an aeration head 420, wherein the gas mixing tank 410 and the aeration head 420 are both installed in the second liquid outlet pipe 740, and the gas mixing tank 410 is located upstream of the aeration head 420. In a specific form of the micro-nano bubble generator 400, a mixed fluid mixed and pressurized by the booster pump 200 firstly enters the gas mixing tank 410, and the mixed fluid is pressurized and dissolved in the gas mixing tank 410 and then released by a pressure reduction structure in the gas mixing tank 410 to output bubble water with small particle size; and (3) the small-particle bubble water is outgassed again through the porous structure of the aeration head 420 and output to obtain the micro-nano bubble water. Specifically, the diameter of the bubbles in the micro-nano bubble water can be 200nm-50 μm. Optionally, a check valve 580 may be installed in the pipe between the gas mixing tank 410 and the aeration head 420, and the check valve 580 allows the mixed fluid in the gas mixing tank 410 to flow into the aeration head 420 through the check valve 580, but does not allow the fluid in the aeration head 420 to flow back to the gas mixing tank 410, thereby reducing the occurrence of liquid backflow.

It should be noted that "upstream" in this context means that, in the direction of flow of the gas or liquid in the duct, one of the two components is installed closer to the inlet end of the duct upstream, and the other is correspondingly downstream; as described above, "the gas mixer 410 and the aeration head 420 are both mounted to the second outlet pipe 740, and the gas mixer 410 is located upstream of the aeration head 420" means that the gas mixer 410 is closer to the inlet end of the second outlet pipe 740 and the aeration head 420 is closer to the outlet end of the second outlet pipe 740 along the direction of flow of the mixed fluid in the second outlet pipe 740.

Optionally, a water purification assembly may be disposed in the gas mixing tank 410, specifically, the water purification assembly may be blocked between the inlet and the outlet of the gas mixing tank 410, and the mixed fluid enters the gas mixing tank, needs to be filtered and purified by the water purification assembly, reaches the outlet, and continues to reach the aeration head 420; the water purification assembly can be used for filtering and purifying the mixed fluid so as to reduce impurities contained in the mixed fluid, improve the water quality of the prepared micro-nano bubble water and reduce the blockage of the mixed fluid on a subsequent aeration head, a second valve and the like; specifically, the water purification component may be a PP (Polypropylene) cotton filter element, a carbon rod filter element, an MF (Microfiltration) membrane filter element, an UF (Ultrafiltration) membrane filter element, an NF (Nanofiltration membrane) filter element, an RO (Reverse Osmosis) membrane filter element, or the like.

In this embodiment, as shown in fig. 3, the water purifying apparatus may further include a processor 800, the filter element assembly 300 is located upstream of the second valve 520, and a high-voltage switch 650 is installed on a pipe section of the first outlet pipe 730 located between the filter element assembly 300 and the second valve 520; the second liquid outlet pipe 740 is provided with a first liquid flow meter 610, and the first valve 510, the booster pump 200, the gas regulating valve 560, the gas pump 660, the high-pressure switch 650 and the first liquid flow meter 610 are all connected with the processor 800. The processor 800, the high-pressure switch 650 and the first liquid flow meter 610 are arranged, wherein the high-pressure switch 650 can detect the water pressure of the liquid in the first liquid outlet pipe 730, when the second valve 520 is in a closed state, the liquid in the first liquid outlet pipe 730 is in a high-pressure state, when the second valve 520 is in an open state, the liquid in the first liquid outlet pipe 730 flows out through the second valve 520, the water pressure in the first liquid outlet pipe 730 is in a low-pressure state, and the high-pressure switch 650 can transmit a pressure signal representing the on-off state of the second valve 520 to the processor 800; wherein first fluid flow meter 610 is capable of detecting a flow rate of fluid in second effluent pipe 740, fluid in second effluent pipe 740 is discharged through third valve 530 when third valve 530 is open, first fluid flow meter 610 is capable of transmitting a flow signal indicative of an open state of third valve 530 to processor 800, and when third valve 530 is closed, a flow rate detected by first fluid flow meter 610 is zero; the processor 800 determines the on-off states of the second valve 520 and the third valve 530 according to the received high-pressure signal and the flow signal, and controls the on-off states of the first valve 510, the booster pump 200 and the gas regulating valve 560 accordingly.

The embodiment also provides a preparation method, which is used for preparing purified water and micro-nano bubble water by using the water purifying device, wherein the preparation of the purified water comprises the following steps: closing the third valve 530 and opening the second valve 520, the first fluid flow meter 610 transmitting a flow signal indicative of the closed state of the third valve 530 to the processor 800, the high pressure switch 650 transmitting a pressure signal indicative of the open state of the second valve 520 to the processor 800; the processor 800 controls to close the air pump 660 and the gas regulating valve 560 and open the first valve 510 and the booster pump 200, the tap water enters the first liquid inlet pipe 710 and enters the booster pump 200, the pressurized tap water then enters the filter element assembly 300 and is filtered by the filter element assembly 300 to obtain purified water, and the purified water flows out through the second valve 520.

The preparation method of the micro-nano bubble water comprises the following steps: closing the second valve 520 and opening the third valve 530, the high pressure switch 650 transmitting a pressure signal indicative of the closed state of the second valve 520 to the processor 800, the first fluid flow meter 610 transmitting a flow signal indicative of the open state of the third valve 530 to the processor 800; the processor 800 controls to open the air pump 660, the air regulating valve 560, the first valve 510 and the booster pump 200, and tap water enters the first liquid inlet pipe 710 and flows into the booster pump 200; the air pump 660 sucks air to enter the air inlet pipe 750, and the air flows through the air pump 660 and the air regulating valve 560, then the air enters the booster pump 200, the air entering the booster pump 200 and the raw water form mixed fluid after mixed pressurization of the booster pump 200, the mixed fluid enters the micro-nano bubble generator 400, and the obtained micro-nano bubble water flows out through the third valve 530.

The setting of treater 800 on the basis that reduces user operation amount of labour, can realize quick, the accurate control to each electronic component to improve purifier's the convenient degree of use, and when preparing micro-nano bubble water, through the feed liquor volume of accurate control first valve 510, the air input of gas control valve 560 and booster pump 200's pressure boost volume, can obtain the mixed fluid of suitable proportion, correspondingly obtain the micro-nano bubble water of high quality.

It should be noted that, in the present application, the high-voltage switch 650 and the first liquid flowmeter 610 transmit signals to the processor 800, and the control program of the processor 800 to the booster pump 200, the first valve 510, the air pump 660 and the gas regulating valve 560 belongs to the prior art (hereinafter, the signal transmission and control program between the processor 800 and the fifth valve 540, the fourth valve 550, the flushing valve 570, the gas flowmeter 630, the second liquid flowmeter 620, etc. also belong to the prior art), and do not belong to the protection scope of the present application, and are not described herein again. Specifically, as shown in fig. 2, the processor 800 may include a control module 810 and a PWM (pulse width Modulation) speed regulation module, the PWM speed regulation module 820 is connected between the control module 810 and the booster pump 200, and the control module 810 regulates the on-off state and the boosting state of the booster pump 200 through the PWM speed regulation module 820; each electronic component is connected to a control module 810. Alternatively, high pressure switch 650 may be a one-way high pressure switch 650, and one-way high pressure switch 650 may also perform a non-return function on the basis of detecting the water pressure in first outlet pipe 730, and one-way high pressure switch 650 only allows the liquid to flow from filter element assembly 300 to second valve 520, so as to reduce the backflow of the liquid in first outlet pipe 730.

In this embodiment, as shown in fig. 3, a gas flow meter 630 may be installed in the gas inlet pipe 750, a second liquid flow meter 620 may be installed in a pipe section of the first liquid inlet pipe 710 located between the first valve 510 and the booster pump 200, a pressure sensor 640 may be installed in a pipe section of the second liquid outlet pipe 740 located between the booster pump 200 and the micro-nano bubble generator 400, and the gas flow meter 630, the second liquid flow meter 620, and the pressure sensor 640 are all connected to the processor 800.

In the process of preparing micro-nano bubble water by the water purifying device, after the air pump 660, the air regulating valve 560, the first valve 510 and the booster pump 200 are controlled to be opened by the processor 800, the preparation process comprises air flow regulation, liquid flow regulation and mixed fluid pressure regulation, wherein the air flow regulation comprises the following steps: the gas flow meter 630 transmits the gas flow signal to the processor 800, the processor 800 compares the gas flow value represented by the received gas flow signal with the set gas flow range, and if the gas flow value is within the set gas flow range, the gas regulating valve 560 does not need to be adjusted; if the gas flow value is outside the set gas flow range, the processor 800 adjusts the gas regulating valve 560, the gas flow meter 630 transmits the adjusted gas flow signal to the processor 800, the processor 800 compares again, and so on until the gas flow value is outside the set gas flow range.

Wherein, liquid flow regulation includes the following steps: the second liquid flow meter 620 transmits the liquid flow signal to the processor 800, and the processor 800 compares the liquid flow value represented by the received liquid flow signal with the set liquid flow range, and if the liquid flow value is within the set liquid flow range, the first valve 510 does not need to be adjusted; if the liquid flow value is outside the set liquid flow range, the processor 800 adjusts the first valve 510, the second liquid flow meter 620 transmits the adjusted liquid flow signal to the processor 800, the processor 800 compares again, and so on until the liquid flow value is outside the set liquid flow range.

And after the gas flow regulation and the liquid flow regulation are finished, mixed fluid pressure regulation is carried out, wherein the mixed fluid pressure regulation comprises the following steps: the pressure sensor 640 transmits the detected pressure signal of the mixed fluid in the second outlet pipe 740 to the processor 800, and the processor 800 compares a fluid pressure value represented by the received pressure signal with a set fluid pressure range, and if the fluid pressure value is within the set fluid pressure range, the booster pump 200 does not need to be adjusted; if the fluid pressure value is outside the set fluid pressure range, the processor 800 adjusts the booster pump 200, the pressure sensor 640 transmits the adjusted pressure signal to the processor 800, the processor 800 compares again, and so on, until the fluid pressure value is within the set fluid pressure range; the preparation method can obtain the mixed fluid with accurate proportion and pressure, the mixed fluid enters the micro-nano bubble generator 400, and the obtained high-quality micro-nano bubble liquid flows out through the third valve 530.

In this embodiment, as shown in fig. 3, the water purifying apparatus may further include an alarm 670, and the alarm 670 is connected to the processor 800. When the water purifying device is used, an alarm mode can be correspondingly included, the second valve 520 is in a closed state, the high-pressure switch 650 transmits a pressure signal representing that the second valve 520 is in the closed state to the controller, the first liquid flowmeter 610 transmits a detected flow signal in the second liquid outlet pipe 740 to the processor 800, the processor 800 compares a flow value represented by the flow signal with a set water leakage flow range, and if the flow value is smaller than the water leakage flow range, the third valve 530 is in the closed state, and the water purifying device is in a normal standby state; if the flow value is in the water leakage flow range, the processor 800 controls to turn on the alarm 670, and the alarm 670 sends an alarm signal to remind the user that the third valve 530 has a water leakage phenomenon.

Specifically, when the second valve 520 is in the closed state and the liquid flow meter detects that the flow rate in the second liquid outlet pipe 740 is close to zero, the processor 800 receives the corresponding signal, determines that the second valve 520 and the third valve 530 are both in the closed state, and the water purifying device is in the normal standby state; when the second valve 520 is in the closed state and the first liquid flow meter 610 detects that the flow rate in the second liquid outlet pipe 740 is in the range of 0-300ml/min, the processor 800 receives the corresponding signal, and determines that the second valve 520 is in the closed state and the third valve 530 is in the water leakage state caused by not being closed, the processor 800 controls to turn on the alarm 670, and the alarm 670 generates a water leakage alarm to prompt a user. The arrangement can greatly improve the use safety of the water purifying device.

Correspondingly, when micro-nano bubble water needs to be prepared, the liquid flow detected by the first liquid flow meter 610 is larger than the water leakage flow range, and the alarm 670 is not turned on by the judgment of the processor 800.

In this embodiment, the filter element assembly 300 may include a water inlet 310, a purified water outlet 320, and a concentrated water outlet 330, wherein the water inlet 310 and the purified water outlet 320 are connected to the first liquid outlet 730, and the concentrated water outlet 330 is connected to the fifth valve 540. In this embodiment, a filter element assembly 300 is provided, a filter membrane is provided in the filter element assembly 300, tap water enters the filter element assembly 300 through a water inlet 310 of the filter element assembly 300, and a part of tap water reaches a purified water side of the filter membrane through filtration of the filter membrane to become purified water and flows out through a purified water outlet; the other part is trapped on the raw water side of the filter membrane to become concentrated water, and the concentrated water is trapped on the raw water side or flows out through a concentrated water outlet 330. When the water purifying device is used and purified water needs to be prepared, the gas regulating valve 560, the air pump 660 and the third valve 530 are kept closed, the first valve 510 and the second valve 520 are opened, wherein the fifth valve 540 is in a closed state to ensure the water pressure difference on two sides of the filter membrane in the filter element assembly 300; after the filter assembly is used for a period of time, the fifth valve 540 can be opened, tap water directly flows through the raw water side of the filter membrane and is discharged through the concentrated water outlet 330 and the fifth valve 540, wherein the tap water can wash and clean the surface of the filter membrane when flowing through the raw water side of the filter membrane, so that the blocking state of the surface of the filter membrane is reduced, the normal use of the filter assembly is ensured, and the service life of the filter assembly is prolonged.

When micro-nano bubble water needs to be prepared, the second valve 520 and the fifth valve 540 are kept closed, and the third valve 530, the gas regulating valve 560, the first valve 510 and the gas pump 660 are opened. Specifically, the filter element assembly 300 may use an RO (Reverse Osmosis) filter element or an NF (nanofiltering) filter element; alternatively, the cartridge assembly 300 may employ an in-and-out cartridge (in which case the fifth valve 540 is not provided) in addition to the cartridge of the type described above.

The concentrated water outlet 330 is connected to a third outlet 760, the fifth valve 540 is installed in the third outlet 760, and the third outlet 760 is installed with the flush valve 570. The flushing valve 570 comprises a half-open state and a full-open state, when purified water is prepared, the fifth valve 540 can be opened and the flushing valve 570 is adjusted to be in the half-open state, tap water flows through the raw water side of the filter membrane, part of the raw water reaches the purified water side through the filtration of the filter membrane, the other part of the tap water is concentrated to become waste water and is discharged through the flushing valve 570 and the fifth valve 540, wherein the flushing valve 570 in the half-open state plays a role in limiting the flow so as to ensure the water pressure difference of the two sides of the filter membrane and further ensure the normal use of the filter element assembly 300; in addition, in the process of preparing the purified water, the concentrated water can be continuously discharged, the concentration of the concentrated water on the raw water side of the filter membrane can be effectively reduced, and impurities in the concentrated water are discharged, so that the blockage of the filter membrane by the impurities is reduced, the use of the filter core assembly 300 is further ensured, and the service life of the filter core assembly is prolonged.

After the filter membrane is used for a period of time, the fifth valve 540 can be opened, the flushing valve 570 is adjusted to be in a fully-opened state, tap water directly flows through the raw water side of the filter membrane and then is discharged, so that the surface of the raw water side membrane of the filter membrane is flushed, and the blockage of impurities to the filter membrane is reduced.

When the filter element assembly 300 comprises the concentrated water outlet 330, the concentrated water outlet 330 is communicated with the fifth valve 540, and the flushing valve 570 is installed on the third liquid outlet pipe 760, wherein in the step of preparing purified water, after the processor 800 receives a pressure signal indicating that the second valve 520 is opened by the high-pressure switch 650, the processor 800 also controls to open the fifth valve 540, and adjusts the flushing valve 570 to a half-open state; in the step of preparing the micro-nano bubble water, after the processor 800 receives a flow signal indicating that the third valve 530 is opened by the first liquid flow meter 610, the processor 800 also controls to close the fifth valve 540.

The water purifying device further comprises a flushing mode when in use, after the water purifying device is used for a set time, the first liquid flow meter 610 transmits a flow signal representing the closed state of the third valve 530 to the processor 800, the high-pressure switch 650 transmits a pressure signal representing the closed state of the second valve 520 to the processor 800, the processor 800 controls to open the first valve 510, the booster pump 200 and the fifth valve 540 and adjust the flushing valve 570 to be in a fully open state, and raw water flows through the first valve 510, the booster pump 200, the filter element assembly 300, the flushing valve 570 and the fifth valve 540 in sequence and then is discharged.

In this embodiment, as shown in fig. 3 and 4, the water purifying apparatus may further include a second liquid inlet pipe 720, an inlet end of the second liquid inlet pipe 720 is communicated with a pipe section of the first liquid inlet pipe 710 located upstream of the first valve 510, an outlet end of the second liquid inlet pipe 720 is communicated with an inlet end of the booster pump 200, and the fourth valve 550 is installed on the second liquid inlet pipe 720. In the step of preparing purified water, after the processor 800 receives a pressure signal indicating that the second valve 520 is opened by the high-pressure switch 650, the processor 800 controls to close the first valve 510 and open the fourth valve 550, raw water enters the booster pump 200 through the fourth valve 550 and then flows into the filter element assembly 300 to obtain purified water, and the purified water flows out through the second valve 520; in the step of preparing the micro-nano bubble water, after the processor 800 receives a flow signal indicating that the third valve 530 is opened by the first liquid flow meter 610, the processor 800 controls to close the fifth valve 540 and the fourth valve 550 and open the first valve 510, raw water enters the booster pump 200 through the first valve 510 and then enters the micro-nano bubble generator 400 to obtain the micro-nano bubble water, and the micro-nano bubble water flows out through the third valve 530.

The fourth valve 550 is provided such that when purified water is prepared, the fourth valve 550 is in a fully open state to ensure a water supply amount, and accordingly, a pressure of water flowing into the filter cartridge assembly 300; in addition, use two independent feed liquor pipes when preparing the micro-nano bubble water with the purification, when preparing micro-nano bubble water, need not to adjust the feed liquor volume of first valve 510 by a wide margin and just can satisfy micro-nano bubble generator 400's requirement (when not setting up fourth valve 550, preparation purification need be adjusted fourth valve 550 to full open, then need adjust the feed liquor volume of fourth valve 550 by a wide margin again when preparing micro-nano bubble water), the corresponding operation load that reduces treater 800, and the life of extension first valve 510.

In this embodiment, as shown in fig. 4, a pre-filter cartridge 100 may be installed on the first liquid inlet pipe 710, and the pre-filter cartridge 100 is located upstream of the connection between the second liquid inlet pipe 720 and the first liquid inlet pipe 710. Before entering the booster pump 200, tap water is pre-filtered and purified by the pre-filter element 100, and impurities with larger particles in the raw water can be filtered and intercepted, so that the impurity content of the tap water flowing into the booster pump 200 is reduced, the probability of blockage of the booster pump 200, the filter element assembly 300 and the micro-nano bubble generator 400 by the impurities in the tap water is correspondingly reduced, and the normal use of the water purifying device is ensured; in addition, the arrangement of the front filter element 100 can greatly reduce the filtering load of the filter element assembly 300, thereby prolonging the service life thereof.

In this embodiment, as shown in fig. 4, a low-pressure switch 680 may be disposed in the first liquid inlet pipe 710, and the low-pressure switch 680 is connected to the processor 800. The low pressure switch 680 is used for detecting the water pressure of the tap water entering the first liquid inlet pipe 710, when the water pressure is higher than a set value, the low pressure switch 680 transmits an electric signal with normal water pressure to the processor 800, and the water purifying device can be normally used; when the water pressure is lower than the set value, it indicates that the water pressure of the tap water is low and the flow of the tap water cannot meet the normal use of the water purification apparatus, the low-pressure switch 680 transmits the electric signal with low water pressure to the processor 800, and the processor 800 correspondingly controls to shut down the booster pump 200 and other electronic components, so as to reduce the occurrence of the condition that the booster pump 200 is damaged due to small water flow.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (15)

1. The water purifying device is characterized by comprising a booster pump (200), wherein the inlet end of the booster pump (200) is communicated with a first liquid inlet pipe (710) and an air inlet pipe (750), the first liquid inlet pipe (710) is provided with a first valve (510), and the air inlet pipe (750) is provided with an air regulating valve (560) and an air pump (660);

a first liquid outlet and a second liquid outlet are formed in the liquid outlet end of the booster pump (200), the first liquid outlet is communicated with a first liquid outlet pipe (730), and the first liquid outlet pipe (730) is provided with a filter element assembly (300) and a second valve (520); the second liquid outlet is communicated with a second liquid outlet pipe (740), and the second liquid outlet pipe (740) is provided with a micro-nano bubble generator (400) and a third valve (530).

2. The water purification apparatus of claim 1, further comprising a second liquid inlet pipe (720), wherein an inlet end of the second liquid inlet pipe (720) is communicated with a pipe section of the first liquid inlet pipe (710) located upstream of the first valve (510), an outlet end of the second liquid inlet pipe (720) is communicated with an inlet end of the booster pump (200), and the second liquid inlet pipe (720) is provided with a fourth valve (550).

3. The water purification apparatus of claim 2, wherein the first liquid inlet pipe (710) is provided with a pre-filter element (100), and the pre-filter element (100) is located upstream of the communication of the second liquid inlet pipe (720) and the first liquid inlet pipe (710).

4. The water purification apparatus of claim 1, wherein the filter element assembly (300) comprises a water inlet (310), a purified water outlet (320) and a concentrated water outlet (330), the water inlet (310) and the purified water outlet (320) are connected to the first liquid outlet pipe (730), and the concentrated water outlet (330) is connected to a fifth valve (540).

5. The water purification apparatus of claim 4, wherein the concentrated water outlet (330) is connected to a third liquid outlet pipe (760), the fifth valve (540) is installed in the third liquid outlet pipe (760), and the third liquid outlet pipe (760) is installed with a flush valve (570).

6. The water purification apparatus of claim 1, wherein the micro-nano bubble generator (400) comprises a gas mixing tank (410) and an aeration head (420), the gas mixing tank (410) and the aeration head (420) are both mounted on the second liquid outlet pipe (740), and the gas mixing tank (410) is located upstream of the aeration head (420).

7. The water purification apparatus of any one of claims 1-6, further comprising a processor (800), wherein the filter element assembly (300) is located upstream of the second valve (520), and wherein a section of the first outlet pipe (730) located between the filter element assembly (300) and the second valve (520) is provided with a high-pressure switch (650); first liquid flow meter (610) is installed to second drain pipe (740), first valve (510) booster pump (200) gas regulating valve (560) air pump (660) high pressure switch (650) and first liquid flow meter (610) all with treater (800) are connected.

8. The water purifying device of claim 7, wherein a gas flow meter (630) is installed in the gas inlet pipe (750), a second liquid flow meter (620) is installed in a pipe section of the first liquid inlet pipe (710) between the first valve (510) and the booster pump (200), a pressure sensor (640) is installed in a pipe section of the second liquid outlet pipe (740) between the booster pump (200) and the micro-nano bubble generator (400), and the gas flow meter (630), the second liquid flow meter (620) and the pressure sensor (640) are all connected with the processor (800).

9. The water purification apparatus of claim 7, further comprising an alarm (670), wherein the alarm (670) is connected to the processor (800).

10. A preparation method, which is characterized in that the water purifying device of any one of claims 7 to 9 is used for preparing purified water and micro-nano bubble water:

wherein, the preparation of the purified water comprises the following steps:

closing the third valve (530) and opening the second valve (520), the first fluid flow meter (610) communicating a flow signal indicative of a closed state of the third valve (530) to the processor (800), the high pressure switch (650) communicating a pressure signal indicative of an open state of the second valve (520) to the processor (800); the processor (800) controls to close the air pump (660) and the air regulating valve (560), opens the first valve (510) and the booster pump (200), raw water enters the first liquid inlet pipe (710) and enters the booster pump (200), the boosted raw water then enters the filter element assembly (300) and is filtered by the filter element assembly (300) to obtain purified water, and the purified water flows out of the first liquid outlet pipe (730);

the preparation method of the micro-nano bubble water comprises the following steps:

closing the second valve (520) and opening the third valve (530), the high pressure switch (650) communicating a pressure signal indicative of a closed state of the second valve (520) to the processor (800), the first fluid flow meter (610) communicating a flow signal indicative of an open state of the third valve (530) to the processor (800); the processor (800) controls to open the air pump (660), the air regulating valve (560), the first valve (510) and the booster pump (200), and raw water enters the first liquid inlet pipe (710) and flows into the booster pump (200); air pump (660) suction gas gets into intake pipe (750) to flow through air pump (660) and gas control valve (560), and then gas gets into booster pump (200), and the gas that gets into booster pump (200) forms the fluid mixture after the mixed pressure boost of booster pump (200) with raw water, and the fluid mixture gets into micro-nano bubble generator (400), and the micro-nano bubble water that obtains flows out second drain pipe (740).

11. The preparation method of claim 10, wherein the processor (800) controls to open the air pump (660), the air regulating valve (560), the first valve (510) and the booster pump (200) during the preparation of the micro-nano bubble water, and the preparation process comprises air flow regulation, liquid flow regulation and mixed fluid pressure regulation, wherein the air flow regulation comprises the following steps:

the gas flow meter (630) transmits the gas flow signal to the processor (800), the processor (800) compares a gas flow value represented by the received gas flow signal with a set gas flow range, and if the gas flow value is within the set gas flow range, the gas regulating valve (560) is not required to be adjusted; if the gas flow value is outside the set gas flow range, the processor (800) adjusts the gas adjusting valve (560), the gas flow meter (630) transmits the adjusted gas flow signal to the processor (800), the processor (800) compares the gas flow signal again, and the process is circulated until the gas flow value is within the set gas flow range;

wherein, liquid flow regulation includes the following steps:

the second liquid flow meter (620) transmits the liquid flow signal to the processor (800), the processor (800) compares the liquid flow value represented by the received liquid flow signal with the set liquid flow range, and if the liquid flow value is within the set liquid flow range, the first valve (510) does not need to be adjusted; if the liquid flow value is outside the set liquid flow range, the processor (800) adjusts the first valve (510), the second liquid flow meter (620) transmits the adjusted liquid flow signal to the processor (800), the processor (800) compares again, and the process is circulated until the liquid flow value is within the set liquid flow range;

and after the gas flow regulation and the liquid flow regulation are finished, mixed fluid pressure regulation is carried out, wherein the mixed fluid pressure regulation comprises the following steps:

the pressure sensor (640) transmits the detected pressure signal of the mixed fluid in the second liquid outlet pipe (740) to the processor (800), the processor (800) compares a fluid pressure value represented by the received pressure signal with a set fluid pressure range, and if the fluid pressure value is within the set fluid pressure range, the booster pump (200) does not need to be adjusted; if the fluid pressure value is outside the set fluid pressure range, the processor (800) adjusts the booster pump (200), the pressure sensor (640) transmits the adjusted pressure signal to the processor (800), the processor (800) compares again, and the process is circulated until the fluid pressure value is within the set fluid pressure range;

the mixed fluid enters the micro-nano bubble generator (400), and the obtained micro-nano bubble liquid flows out of the second liquid outlet pipe (740).

12. The method of claim 10, wherein the water purification apparatus further comprises an alarm mode, the high pressure switch (650) transmits a pressure signal indicating that the second valve (520) is in a closed state to the controller, the first fluid flowmeter (610) transmits a detected flow signal in the second outlet pipe (740) to the processor (800), and the processor (800) compares a flow value indicated by the flow signal with a set water leakage flow range, and indicates that the third valve (530) is in a closed state if the flow value is smaller than the water leakage flow range;

if the flow value is in the water leakage flow range, the processor (800) controls to open the alarm (670), and the alarm (670) sends out an alarm signal to remind a user that the third valve (530) has the water leakage phenomenon.

13. The method of claim 10, wherein when the filter cartridge assembly (300) includes the concentrated water outlet (330), the concentrated water outlet (330) is connected to a fifth valve (540), and the third outlet pipe (760) is provided with a flush valve (570), and wherein, in the step of preparing purified water, the processor (800) further controls to open the fifth valve (540) and to adjust the flush valve (570) to a half-open state after receiving a pressure signal indicating that the second valve (520) is open from the high pressure switch (650);

in the step of preparing the micro-nano bubble water, after the processor (800) receives a flow signal indicating that the third valve (530) is opened by the first liquid flow meter (610), the processor (800) can also control to close the fifth valve (540).

14. The method as set forth in claim 13, wherein the water purifying apparatus further comprises a flushing mode, after a set time of use, the first liquid flowmeter (610) transmits a flow signal indicating a closed state of the third valve (530) to the processor (800), the high pressure switch (650) transmits a pressure signal indicating a closed state of the second valve (520) to the processor (800), the processor (800) controls to open the first valve (510), the booster pump (200), and the fifth valve (540), and the flushing valve (570) is adjusted to a full open state, and raw water is discharged after flowing through the first valve (510), the booster pump (200), the filter element assembly (300), the flushing valve (570), and the fifth valve (540).

15. The method of claim 10, wherein when the fourth valve (550) is disposed in the water purification apparatus, wherein in the step of preparing the purified water, after the processor (800) receives the pressure signal indicating that the second valve (520) is opened by the high-pressure switch (650), the processor (800) controls to close the first valve (510) and open the fourth valve (550), the raw water enters the booster pump (200) through the fourth valve (550) and then flows into the filter element assembly (300) to obtain the purified water, and the purified water flows out of the first outlet pipe (730);

in the step of preparing the micro-nano bubble water, after the processor (800) receives a flow signal indicating that the third valve (530) is opened by the first liquid flow meter (610), the processor (800) controls to close the fifth valve (540) and the fourth valve (550) and open the first valve (510), raw water enters the booster pump (200) through the first valve (510) and then enters the micro-nano bubble generator (400) to obtain the micro-nano bubble water, and the micro-nano bubble water flows out of the second liquid outlet pipe (740).

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