CN220887126U - Water route structure and water purification unit of water purification unit - Google Patents

Abstract

The utility model relates to the technical field of water purifying equipment, in particular to a waterway structure of water purifying equipment and the water purifying equipment, and aims to solve the technical problems that the cleaning effect of the conventional cleaning mode of the water purifying equipment on a filter element is poor and the working procedure is complicated. The water path structure comprises a raw water tank, a raw water pipeline, a filtering device, a pure water pipeline, a pure water tank, a water outlet pipeline and a water outlet valve which are sequentially communicated, wherein the raw water pipeline is provided with a first water pump, the water path structure further comprises a first water return pipeline which is communicated with the raw water tank and the filtering device, and a second water return pipeline which is communicated with the pure water tank and the raw water pipeline, wherein the first water return pipeline and the raw water pipeline form a flushing circulation pipeline at the front end of a filter membrane, so that flushing of impurities at the front end of the filter membrane by water flow is realized, the prepared pure water flows back to the raw water tank through the circulation pipeline, and then the pure water is filtered through the filter element, so that cleaning of impurities at the rear end of the filter membrane by water flow is realized. By such arrangement, the cleaning effect is optimized, and the cleaning process is simplified.

Description

Water route structure and water purification unit of water purification unit

Technical Field

The utility model relates to the technical field of water purifying equipment, and particularly provides a waterway structure of water purifying equipment and the water purifying equipment.

Background

In recent years, along with the development of science and technology and the improvement of the living standard of people, the safety and health problems of drinking water are more and more concerned by society, so that the rapid development of the field of water purifying equipment is promoted, the existing water purifying equipment can carry out multiple filtration on a water source, so that the purified water reaches the standard of direct drinking, and meanwhile, the structure and the function of the water purifying equipment are more reasonable, and the water purifying equipment is more convenient to use.

For example, the existing popular installation-free water purifier integrates purification and heating, does not need to be installed in a butt joint way with a pipeline, and can obtain purified water of a direct-drinking level after tap water is filled in an original water tank.

However, the cleaning effect of the existing cleaning mode of the water purifying equipment on the filter element is poor, the working procedure is complex, and the use experience of a user is affected.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of utility model

The utility model aims to solve the technical problems that the cleaning effect of the traditional cleaning mode of the water purifying equipment on the filter element is poor, the procedures are complicated, and the use experience of a user is affected.

In a first aspect, the present utility model provides a waterway structure of a water purifying apparatus, the waterway structure includes a raw water tank, a filtering device, a pure water tank, a water outlet valve, a raw water pipeline, a pure water pipeline, a water outlet pipeline and a first water pump, both ends of the raw water pipeline are respectively connected to a water outlet of the raw water tank and a water inlet of the filtering device, the first water pump is installed on the raw water pipeline to pump raw water into the filtering device, both ends of the pure water pipeline are respectively connected to a first water outlet of the filtering device and a water inlet of the pure water tank to introduce filtered pure water into the pure water tank for storage, both ends of the water outlet pipeline are respectively connected to a water outlet of the pure water tank and the water outlet valve to control the outflow of pure water, the waterway structure further includes a first water return pipeline connected to a water return port of the raw water tank and a second water outlet of the filtering device, and a solenoid valve installed on the first water return pipeline, the first water return pipeline can form a flushing circulation pipeline with the raw water pipeline to enable the circulating water to be pumped into the filtering device, both ends of the pure water pipeline are respectively connected to the first water return pipeline and the water return pipeline to the water inlet of the filtering device, the water return pipeline is connected to the water inlet of the water pump through the first water return pipeline, the water return pipeline is connected to the water pump, and the water return pipeline is connected to the water pump through the water return pipeline, and the water circulation pipeline is connected to the water circulation pipeline, the reversing valve can control the first water pump to be communicated with the water outlet of the original water tank or the second end of the second water return pipeline independently so as to pump the original water in the original water tank or the pure water in the pure water tank into the filtering device for flushing.

In the preferable technical scheme of the waterway structure, the filtering device is an RO filter core.

In the preferable technical scheme of the waterway structure, the first water pump is set as a self-priming booster pump.

In the preferable technical scheme of the waterway structure, the waterway structure further comprises a second water pump arranged on the water outlet pipeline, and the second water pump can pump pure water in the pure water tank to the water outlet valve.

In the preferable technical scheme of the water path structure, the water path structure further comprises a heating device arranged on the water outlet pipeline, and the heating device can heat the pure water flowing through to generate hot water at the water outlet valve.

In a preferred embodiment of the above waterway structure, the heating device is a thick film heater.

In the preferable technical scheme of the waterway structure, the waterway structure further comprises a liquid level detection device arranged in the pure water tank and/or the original water tank.

In the preferable technical scheme of the water path structure, the first end of the second water return pipeline is communicated with the water inlet of the pure water tank.

In a second aspect, the present utility model also provides a water purification apparatus, which includes the above waterway structure.

In the preferable technical scheme of the water purifying device, the water purifying device is arranged as a water purifier without installation.

Under the condition that the technical scheme is adopted, the waterway structure comprises the raw water tank, the filtering device, the pure water tank, the water outlet valve, the raw water pipeline, the pure water pipeline, the water outlet pipeline and the first water pump, wherein two ends of the raw water pipeline are respectively communicated with the water outlet of the raw water tank and the water inlet of the filtering device, the first water pump is arranged on the raw water pipeline so as to pump raw water into the filtering device, two ends of the pure water pipeline are respectively communicated with the first water outlet of the filtering device and the water outlet valve so as to introduce filtered pure water into the pure water tank for storage, two ends of the water outlet pipeline are respectively communicated with the water outlet of the pure water tank and the water outlet valve so as to control pure water to flow out, the waterway structure also comprises a first water return pipeline which is communicated with a water return port of the raw water tank and a second water outlet of the filtering device and a solenoid valve arranged on the first water return pipeline, the first water return pipeline and the raw water pipeline form a flushing circulation pipeline so that circulating water flow washes the front end of the filtering device, the solenoid valve can control on and off of the first return pipeline so that water flow in the filtering device flows into the first water outlet or the second water outlet of the filtering device, the water return pipeline is respectively, the water return pipeline is communicated with the water outlet of the pure water tank or the pure water tank respectively, the water return pipeline is communicated with the water outlet valve is independently arranged on the water tank or the water tank through the water return valve, and the water return pipeline is communicated with the water outlet valve. By the arrangement, on one hand, raw water in the raw water tank can circularly flow in the circulating pipeline by independently operating the circulating pipeline, so that the front end of a filter membrane in the filter device can be washed; on the other hand, pure water in the pure water tank can flow back to the original water tank through the second water return pipeline, finally enters the pure water tank again through the filtering device, so that the flushing of impurities at the front end of the filter membrane is realized, the flushing of impurities at the rear end of the filter membrane is realized, the self-cleaning efficiency of the water purifying equipment is effectively improved, the cleaning effect of the filter element is improved, the degree of automation of self-cleaning is improved, the complicated procedure is simplified, the water consumption in the cleaning process is reduced, and the water source and the cost are saved.

Further, the filter device of the present utility model is provided as an RO cartridge. Through such setting, can effectively promote filter equipment to the filter effect of raw water, improve the purification level of preparing pure water.

Further, the first water pump of the present utility model is provided as a self priming booster pump. By the arrangement, on one hand, the power can be provided for water flow in the waterway structure, so that the water flow can flow in the waterway structure; on the other hand, by pressurizing the water flow, the water flow is ensured to pass through the RO filter membrane so as to finish the filtration of the raw water.

Still further, the waterway structure of the present utility model further includes a second water pump installed on the water outlet pipeline, and the second water pump can pump pure water in the pure water tank to the water outlet valve. Through such setting, can provide power for the outflow of pure water to can set up the installation height and the position of outlet valve door in a flexible way, make the access of pure water more convenient.

Still further, the waterway structure of the present utility model further includes a heating device installed on the water outlet pipeline, the heating device being capable of heating the purified water flowing therethrough to generate hot water at the water outlet valve. Through such setting, be convenient for control the pure water temperature of play water valve department to can satisfy the user and to the different demands of drinking water temperature, promote user experience.

Still further, the heating device of the present utility model is provided as a thick film heater. Through the arrangement, the quick heating efficiency of the flowing pure water can be effectively improved, the water temperature can be better controlled, and meanwhile, the energy consumption is reduced.

Still further, the waterway structure of the present utility model further includes a liquid level detection device installed in the pure water tank and/or in the raw water tank. Through such setting, can carry out real-time detection to the surface of water height in pure water tank and/or the former water tank to in time control the break-make of corresponding valve, realize the accurate control to rivers break-make.

Still further, the first end of the second water return line of the present utility model communicates with the water inlet of the fresh water tank. Through such setting, need not to install the solenoid valve and switch the pure water flow direction, help simplifying the waterway structure.

In addition, the water purifying equipment further provided by the utility model comprises the water path structure, so that the water purifying equipment further has the technical effect of the water path structure.

Still further, the water purifying apparatus of the present utility model is provided as an installation-free water purifier.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram illustrating the operation of the waterway structure of the present utility model.

List of reference numerals:

1. A raw water tank; 11. a raw water pipeline; 111. a first water pump; 12. a first water return line; 121. an electromagnetic valve; 2. a filtering device; 3. a pure water tank; 31. a pure water pipeline; 32. a water outlet pipeline; 321. a second water pump; 322. a heating device; 33. a second water return line; 331. a reversing valve; 34. a liquid level detection device; and 4, a water outlet valve.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", "upper", "lower", "top", "bottom", and the like, which indicate a direction or a positional relationship, are based on the direction or the positional relationship shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

The technical problems that the cleaning effect of the cleaning mode of the existing water purifying equipment on the filter element is poor and the working procedure is complicated are pointed out based on the background technology. The utility model provides a waterway structure of water purifying equipment and the water purifying equipment, which aim to realize the flushing of water flow to impurities at the front end of a filter membrane by arranging a raw water tank, a raw water pipeline, a filtering device, a pure water pipeline, a pure water tank, a water outlet pipeline and a water outlet valve which are sequentially communicated on the waterway structure of the water purifying equipment.

Specifically, as shown in FIG. 1, the waterway structure of the present utility model comprises a raw water tank 1, a filtering device 2, a pure water tank 3, a water outlet valve 4, a raw water pipeline 11, a pure water pipeline 31, a water outlet pipeline 32 and a first water pump 111, wherein two ends of the raw water pipeline 11 are respectively communicated with a water outlet of the raw water tank 1 and a water inlet of the filtering device 2, the first water pump 111 is arranged on the raw water pipeline 11 to pump raw water into the filtering device 2, two ends of the pure water pipeline 31 are respectively communicated with a first water outlet of the filtering device 2 and a water inlet of the pure water tank 3 to introduce filtered pure water into the pure water tank 3 for storage, two ends of the water outlet pipeline 32 are respectively communicated with a water outlet of the pure water tank 3 and a water outlet valve 4 to control pure water outflow, the waterway structure further comprises a first water return pipeline 12 communicated with a water return port of the raw water tank 1 and a second water outlet of the filtering device 2 and a solenoid valve 121 arranged on the first water return pipeline 12, the first water return pipeline 12 can form a flushing circulation pipeline with the raw water pipeline 11 to flush the front end of the filtering device 2, the solenoid valve 121 can control on-off of the first return pipeline 12 to enable the water to flow into the filtering device 2 and the water inlet of the pure water tank 3 to be communicated with the water outlet of the pure water tank 3, the water return pipeline 33 is communicated with the water outlet of the water return pipeline 33 through the first water return pipeline 33, the water return pipeline 33 is communicated with the water inlet valve 33 is communicated with the water inlet of the pure water tank 1, and the water return pipeline 33 is communicated with the water inlet valve 33 through the water inlet valve 33, and the water inlet valve 33 is communicated with the water inlet 1, to pump the raw water in the raw water tank 1 or the pure water in the pure water tank 3 into the filtering device 2 for a flushing process.

In the waterway structure of the present utility model, the flow direction of raw water in the filtering device 2 can be determined by opening and closing the electromagnetic valve 121, specifically, in the filtering device 2, the filtering membrane divides the filtering device 2 into a front end and a rear end, the water inlet and the second water outlet of the filtering device 2 are both communicated with the front end of the filtering membrane, the first water outlet of the filtering device 2 is communicated with the rear end of the filtering membrane, raw water firstly flows into the front end of the filtering membrane through the water inlet of the filtering device 2 in the water preparation process, at this time, the front end of the filtering membrane needs to be continuously pressurized by the first water pump 111, and only after the pressure of the front end of the filtering membrane reaches a certain value, water molecules in the raw water can permeate the filtering membrane to enter the rear end of the filtering membrane under the action of the pressure, and harmful substances such as impurities in the raw water are remained on the front end surface of the filtering membrane, thereby completing the filtering of the raw water.

Therefore, the front end of the filter membrane has high requirement on air tightness, and the electromagnetic valve 121 needs to be closed to break the communication between the front end of the filter membrane and the raw water tank 1 so as to ensure that enough pressure is available to complete the filtration of the raw water pressure filter membrane.

When the electromagnetic valve 121 is opened, the raw water tank 1 is communicated with the front end of the filter membrane, at this time, the resistance of the second water outlet is far smaller than that of the filter membrane, raw water flows into the first water return pipeline 12 for circulation through the second water outlet of the filter device 2 under the drive of the first water pump 111, and water flows to flush the surface of the filter membrane when flowing through the front end of the filter membrane, so that the residual impurities after filtration are flushed away, and a flushing flow is completed.

Furthermore, the pure water in the pure water tank 3 can also be pumped into the filtering device 2 due to the arrangement of the second return pipe and the reversing valve 331 to flush the surface of the front end of the filter membrane and finally return to the raw water tank 1.

Therefore, by controlling the solenoid valve 121 and the directional valve 331 individually, the water purifying apparatus can be put into different operation modes including a water making mode, a first flushing mode and a second flushing mode.

When the electromagnetic valve 121 is closed, the reversing valve 331 is simultaneously connected with the water outlet of the raw water tank 1 and the first water pump 111, the water purifying device enters a normal water making mode, raw water (usually tap water or barreled water and the like) in the raw water tank 1 enters the filtering device 2 through the raw water pipeline 11 under the suction action of the first water pump 111 in the water making mode, the front end of the filtering membrane is continuously pressurized by the first water pump 111 in the filtering device 2, water molecules in the raw water permeate the filtering membrane under the action of pressure and enter the rear end of the filtering membrane to finish filtering, the raw water is changed into pure water after being filtered by the filtering membrane, and flows out of the water outlet of the filtering device 2 and enters the pure water tank 3 to be stored through the pure water pipeline 31, and when a user needs drinking water, the water purifying device can be accessed only by opening the water outlet valve 4, so that the water making process of the water purifying device is finished.

When the water purifying apparatus is used for the first time or is used for a long time without cleaning, for example, the water purifying apparatus is restarted after being idle for a period of time, or the filter element is just replaced, in these cases, the filter element and the inside of the waterway structure are required to be cleaned first to be used, so that impurities or protection liquid on the filter element are required to be cleaned, at this time, the raw water tank 1 is required to be filled with water, the electromagnetic valve 121 is opened, and the reversing valve 331 is controlled to be communicated with the water outlet of the raw water tank 1 and the first water pump 111, so that the water purifying apparatus enters a first flushing mode, and raw water in the raw water tank 1 flows through the pure water pipeline 31, the filtering device 2 and the first water return pipeline 12 in sequence under the action of the first water pump 111 and then returns to the raw water tank 1, and continuously circulates to clean impurities or protection liquid on the front end surface of the filter membrane and take away.

Preferably, the operation time of the first flushing mode of the present utility model may be set to 5 to 10 minutes, and the raw water tank 1 is emptied after the operation is finished to drain impurities, as the case may be.

In the first flushing mode, besides flushing the surface of the front end of the filter membrane, the raw water pipeline 11, the first water return pipeline 12 and the inner wall of the raw water tank 1 can be flushed to a certain extent, so that the cleaning effect is improved.

After the operation of the first flushing mode is finished, the second flushing mode is continuously executed, in the second flushing mode, the raw water tank 1 needs to be filled with water again, meanwhile, the electromagnetic valve 121 is closed, the control reversing valve 331 is communicated with the water outlet of the raw water tank 1 and the first water pump 111, the first water pump 111 is started, a water making process is finished in the waterway structure, so that pure water is obtained in the pure water tank 3, in the process, the raw water can flush the rear end surface of the filter membrane in the process of passing through the filter element, and impurities and protection liquid are brought into the pure water tank 3.

After the pure water tank 3 is filled with pure water, the electromagnetic valve 121 is opened, the reversing valve 331 is controlled to be communicated with the second end of the second water return pipeline 33 and the first water pump 111, after the first water pump 111 is started, pure water in the pure water tank 3 sequentially flows through the second water return pipeline 33, the raw water pipeline 11, the front end of the filter membrane and the first water return pipeline 12 and then enters the raw water tank 1, the raw water tank 1 is filled with pure water, the water making process is carried out again, the water is repeatedly circulated for a plurality of times, and finally, water is completely injected into the raw water tank 1 to pour out the water, so that the cleaning of impurities and protective liquid at the rear end of the filter membrane is completed, and meanwhile, the inside of all pipelines in the waterway structure is repeatedly flushed, so that a good cleaning effect is achieved.

Preferably, the operation time of the second flushing mode of the present utility model may be set to 10 to 20 minutes, and the raw water tank 1 is emptied after the operation is finished to drain the impurities, as the case may be.

In addition, after the cleaning is finished, the cleaning water in the waterway structure can be completely concentrated into the original water tank 1 and poured out, so that the waste water in the waterway structure is cleaned more thoroughly, no residue exists, the process of draining the pure water tank 3 by a user is omitted, and the cleaning flow is simplified.

The control of the solenoid valve 121, the reversing valve 331, and the first water pump 111 may be automatically controlled by a control program stored in a processor, or may be manually controlled, as long as the operation and switching of each operation mode can be achieved.

By such arrangement, on the one hand, the raw water in the raw water tank 1 can be circulated in the circulation line by operating the circulation line alone, so that the front end of the filter membrane in the filter device 2 can be washed; on the other hand, pure water in the pure water tank 3 can flow back to the original water tank 1 through the second water return pipeline 33, finally enters the pure water tank 3 again through the filtering device 2, not only is the flushing of impurities at the front end of the filter membrane realized, but also the flushing of impurities at the rear end of the filter membrane is realized, the self-cleaning efficiency of the water purifying equipment is effectively improved, the cleaning effect of the filter element is improved, the degree of automation of self-cleaning is improved, complicated procedures are simplified, the water consumption in the cleaning process is reduced, and the water source and the cost are saved.

Preferably, as shown in fig. 1, the filter device 2 of the present utility model is provided as an RO cartridge.

The aperture of the reverse osmosis membrane of the RO filter element can reach 0.0001 micron, and the RO filter element has strong reverse osmosis characteristic, so that water flow can pass through the RO filter element under a relatively high pressure, impurities, colloid, heavy metal ions, organic matters, bacteria, viruses and the like in raw water can be effectively filtered, the filtering effect on the raw water is improved, and the purification grade of the prepared pure water is improved.

Preferably, as shown in fig. 1, the first water pump 111 of the present utility model is provided as a self priming booster pump.

The self-priming booster pump can continuously boost the pressure of the front end of the filter membrane in a state that the solenoid valve 121 is closed, and water molecules permeate through the filter membrane under the action of pressure, so that bacteria, impurities and the like in raw water are left at the front end of the filter membrane.

Therefore, the self-priming booster pump can provide enough power for water flow in the waterway structure, so that the water flow can flow in the waterway structure; the raw water can be pressurized, so that water flow can pass through the RO filter membrane, and the raw water can be filtered.

Preferably, as shown in fig. 1, the waterway structure of the present utility model further includes a second water pump 321 installed on the water outlet pipeline 32, and the second water pump 321 is capable of pumping pure water in the pure water tank 3 to the water outlet valve 4.

Through setting up second water pump 321, can provide power for the outflow of pure water to take out water valve 4 departments with the pure water in the pure water tank 3, guarantee out water flow, need not simultaneously to make the installation height of water valve 4 be less than pure water tank 3, thereby can set up in a flexible way according to water purification unit's structural requirement.

Preferably, as shown in fig. 1, the waterway structure of the present utility model further includes a heating device 322 installed on the water outlet pipe 32, and the heating device 322 is capable of heating the pure water flowing therethrough to generate hot water at the water outlet valve 4.

Therefore, cold and hot control of water flow at the water outlet valve 4 is realized, different requirements of users on drinking water temperature can be met, and user experience is improved.

It should be noted that, in practical applications, those skilled in the art may flexibly configure the heating device 322 as a heating tube, a heating wire, or a thick film heater, etc., and such flexible adjustment and modification should be limited within the scope and spirit of the present utility model.

Preferably, as shown in FIG. 1, the heating device 322 of the present utility model is configured as a thick film heater.

The thick film heater has the characteristics of accurate temperature control and uniform heating, can effectively improve the heating efficiency and accuracy of pure water, can accurately control the water temperature, and is beneficial to reducing the energy consumption.

Preferably, as shown in fig. 1, the waterway structure of the present utility model further includes a liquid level detecting device 34 installed in the pure water tank 3 and/or the raw water tank 1.

The liquid level detection device 34 is illustratively a mechanical float or an infrared sensor, and is electrically connected with the processor to detect the water level in the pure water tank 3 and/or the raw water tank 1 in real time, so as to control the on-off of the corresponding valve in time, and realize the switching between the working modes.

In the present utility model, it is preferable that the liquid level detecting device 34 is installed in both the pure water tank 3 and the raw water tank 1.

Preferably, as shown in fig. 1, the first end of the second water return line 33 of the present utility model communicates with the water inlet of the pure water tank 3.

In practical application, the first end of the second water return pipeline 33 can be communicated with the water inlet of the pure water tank 3, the water outlet of the pure water tank 3, or the single opening is communicated with the pure water tank 3, after the first end of the second water return pipeline 33 is communicated with the water inlet of the pure water tank 3, other electromagnetic valves 121 are not required to be arranged to control the on-off of the waterway, so that one-port dual-purpose is realized, the waterway structure is simplified, and the cost is saved.

In addition, the utility model also provides water purifying equipment based on the technical scheme, which comprises the waterway structure.

Illustratively, the water purifying apparatus of the present utility model may be configured as a mounting-free water purifier.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. The waterway structure of the water purifying equipment is characterized by comprising a raw water tank, a filtering device, a pure water tank, a water outlet valve, a raw water pipeline, a pure water pipeline, a water outlet pipeline and a first water pump, wherein the two ends of the raw water pipeline are respectively communicated with a water outlet of the raw water tank and a water inlet of the filtering device, the first water pump is arranged on the raw water pipeline to pump raw water into the filtering device, the two ends of the pure water pipeline are respectively communicated with a first water outlet of the filtering device and a water inlet of the pure water tank to introduce filtered pure water into the pure water tank for storage, the two ends of the water outlet pipeline are respectively communicated with a water outlet of the pure water tank and the water outlet valve to control the outflow of pure water,

The waterway structure also comprises a first water return pipeline which is communicated with the water return port of the raw water tank and the second water outlet of the filtering device, and an electromagnetic valve which is arranged on the first water return pipeline, wherein the first water return pipeline and the raw water pipeline can form a flushing circulation pipeline so as to enable circulating water to flush the front end of the filtering device, the electromagnetic valve can control the on-off of the first water return pipeline so as to enable water in the filtering device to flow into the first water outlet or the second water outlet, thereby carrying out a water making process or a flushing process,

The water way structure further comprises a second water return pipeline, a first end of the second water return pipeline is communicated with the pure water tank, a second end of the second water return pipeline is communicated with the raw water pipeline through a reversing valve, the communication position of the second water return pipeline is located between a water outlet of the raw water tank and the first water pump, and the reversing valve can control the first water pump to be independently communicated with the water outlet of the raw water tank or the second end of the second water return pipeline so as to pump raw water in the raw water tank or pure water in the pure water tank into the filtering device for flushing.

2. The waterway structure of claim 1, wherein the filtering device is configured as an RO cartridge.

3. The waterway structure of claim 2, wherein the first water pump is configured to be a self-priming booster pump.

4. The waterway structure of claim 1, further comprising a second water pump installed on the water outlet pipeline, the second water pump being capable of pumping pure water in the pure water tank to the water outlet valve.

5. The waterway structure of claim 4, further comprising a heating device installed on the water outlet pipeline, the heating device capable of heating pure water flowing therethrough to generate hot water at the water outlet valve.

6. The waterway structure of claim 5, wherein the heating device is configured as a thick film heater.

7. The waterway structure of claim 1, further comprising a liquid level detection device mounted within the pure water tank and/or within the raw water tank.

8. The waterway structure of claim 1, wherein a first end of the second return line is in communication with a water inlet of the pure water tank.

9. A water purification apparatus comprising the waterway structure of any one of claims 1 to 8.

10. The water purification apparatus of claim 9, wherein the water purification apparatus is configured as a mounting-free water purifier.