CN221117229U - Water purification system - Google Patents

Abstract

The utility model relates to the technical field of water purification, and discloses a water purification system, including a water making device, a heating device, a reverse flushing pipeline and a control valve group. The water making device includes a water making pipeline and a front and rear filter elements connected in series to the water making pipeline and both including a carbon water purification unit. The front filter element has a front filter element water inlet and a front filter element water outlet, the rear filter element has a rear filter element water inlet and a rear filter element water outlet, the heating device has a heating water inlet and a heating water outlet, the reverse flushing pipeline includes a first regeneration pipeline connected in parallel to the heating water outlet and the rear filter element water outlet, a second regeneration pipeline connected in parallel to the heating water outlet and the front filter element water outlet, and a drainage pipeline connected to the rear filter element water inlet and the front filter element water inlet, and the control valve group is arranged on the water making pipeline and the reverse flushing pipeline. The utility model can reversely hot-wash the front filter element and/or the rear filter element to remove impurities and dredge the filter element, thereby extending the service life, reducing the replacement frequency, and increasing the rated water purification capacity of the system.

Description

Water purification system

Technical Field

The utility model relates to the technical field of water purification, in particular to a water purification system.

Background technique

During the pipe network transportation process, tap water will inevitably be polluted by rust, silt, organic matter and microorganisms, and a water purifier with purification function can play a good role in removing impurities and purifying tap water. The water purification system of a water purifier usually includes a pre-treatment filter element, a precision filter element, and a post-treatment filter element. The pre-treatment filter element is used to remove organic matter, colloids, heavy metals and silt particles, etc. The precision filter element (RO filter element) is extremely high in precision, such as the reverse osmosis membrane filter element, which is the core treatment filter element of the water purification system. The post-treatment filter element is used to remove trace elements, adjust pH and drinking taste, etc.

The activated carbon component in the pre-treatment filter element and the post-treatment filter element can effectively remove oxidizing substances such as residual chlorine. Therefore, the activated carbon component is an indispensable and important component in the pre-treatment filter element and the post-treatment filter element. However, the activated carbon component in the pre-treatment filter element and the post-treatment filter element has a shorter lifespan than other filter elements, resulting in frequent replacement of the pre-treatment filter element and the post-treatment filter element, high cost and also limiting the nominal value of the rated water purification volume of the whole machine.

Utility Model Content

In view of this, the utility model provides a water purification system to solve the problem in the prior art that the pre-treatment filter element and the post-treatment filter element need to be replaced frequently and at high cost.

The utility model provides a water purification system, including a water making device, a heating device, a backwashing pipe and a control valve group, wherein the water making device includes a water making pipeline and a pre-filter element and a post-filter element which are sequentially connected in series to the water making pipeline, wherein the pre-filter element and the post-filter element both include a carbon water purification unit, the pre-filter element has a pre-filter element water inlet and a pre-filter element water outlet, the post-filter element has a post-filter element water inlet and a post-filter element water outlet, the heating device has a heating water inlet and a heating water outlet, the heating water outlet is connected to a water intake end, the backwashing pipeline includes a first regeneration pipeline connected in parallel to the heating water outlet and the post-filter element water outlet, and a second regeneration pipeline connected in parallel to the heating water outlet and the post-filter element water outlet. The second regeneration pipeline between the heating water outlet and the pre-filter cartridge water outlet, and the drainage pipeline respectively connected to the post-filter cartridge water inlet and the pre-filter cartridge water inlet, the control valve group is arranged on the water production pipeline and the backwash pipeline, which is suitable for controlling the water purification system to perform the thermal regeneration mode, and controlling the hot water to flow through the heating water outlet, the first regeneration pipeline, the post-filter cartridge water outlet, the post-filter cartridge, the post-filter cartridge water inlet and the drainage pipeline in sequence, and/or to flow through the heating water outlet, the second regeneration pipeline, the pre-filter cartridge water outlet, the pre-filter cartridge, the pre-filter cartridge water inlet and the drainage pipeline in sequence.

Beneficial effects: tap water flows into the pre-filter and the post-filter in sequence through the water production pipeline to achieve tap water purification, and by connecting a first regeneration pipeline in parallel between the heating water outlet and the post-filter outlet, and connecting a second regeneration pipeline in parallel between the heating water outlet and the pre-filter outlet, and setting a drainage pipeline respectively connected to the post-filter inlet and the pre-filter inlet, the water purification system can execute the thermal regeneration mode according to the use of the pre-filter and the post-filter. When the control valve group controls the water purification system to execute the thermal regeneration mode, the hot water in the heating device can be reversely input into the pre-filter and/or the post-filter to perform reverse hot flushing and regeneration. The hot water not only has a flushing effect, but also can break the balance between the activated carbon and the pollutant adsorbent, so that the pollutants are analyzed and desorbed, so that the carbon water purification unit can restore part of the adsorption capacity and realize the regeneration of the pre-filter and/or the post-filter, thereby extending the service life of the pre-filter and the post-filter, reducing their replacement frequency, and reducing costs. At the same time, it also increases the rated water purification volume of the entire water purification system, and has excellent economic benefits.

In an optional embodiment, the control valve group also includes a first pipeline switching structure, which has a first state in which the water inlet of the pre-filter element is connected to the tap water inlet, and a second state in which the water inlet of the pre-filter element is connected to the drainage pipeline. When the water purification system executes the water production mode, the first pipeline switching structure is in the first state, and when the water purification system executes the thermal regeneration mode, the first pipeline switching structure is in the second state.

Beneficial effect: When the water purification system executes the water production mode, the first pipeline switching structure is in the first state, and the tap water flows through the tap water inlet, the water production pipeline, and the pre-filter inlet in sequence to enter the pre-filter for purification. When the water purification system executes the thermal regeneration mode, the first pipeline switching structure is in the second state, and the hot water after flushing the pre-filter can flow into the drainage pipeline from the pre-filter inlet to be discharged. Therefore, the first pipeline switching structure plays a role in switching the connectivity state of the pre-filter inlet to achieve switching between the water production mode and the thermal regeneration mode.

In an optional embodiment, the control valve group also includes a fourth pipeline switching structure, and the fourth pipeline switching structure has a first state in which the water outlet of the post-filter element is connected to the heating water inlet, and a second state in which the water outlet of the post-filter element is connected to the first regeneration pipeline. When the water purification system executes the water production mode, the fourth pipeline switching structure is in the first state, and when the water purification system executes the thermal regeneration mode, the fourth pipeline switching structure is in the second state.

Beneficial effect: When the water purification system executes the water production mode, the fourth pipeline switching structure is in the first state, so as to connect the water outlet of the post-filter element with the heating water inlet, so that the purified tap water flows through the fourth pipeline switching structure and the heating water inlet into the heating device; when the water purification system executes the hot regeneration mode, the fourth pipeline switching structure is in the second state, so as to connect the water outlet of the post-filter element with the first regeneration pipeline, so that the hot water in the first regeneration pipeline flows back to the post-filter element through the four-pipe switching structure and the water outlet of the post-filter element to realize hot flushing.

In an optional embodiment, the water purification system also includes a fine filter element, which has a fine filter element water inlet, a pure water inlet and a waste water inlet, and the control valve group also includes: a second pipeline switching structure, which has a first state in which the water outlet of the pre-filter element is connected to the water inlet of the fine filter element, and a second state in which the water outlet of the pre-filter element is connected to the second regeneration pipeline, when the water purification system executes a water production mode, the second pipeline switching structure is in the first state, and when the water purification system executes the thermal regeneration mode, the second pipeline switching structure is in the second state; and/or a third pipeline switching structure, which has a first state in which the pure water inlet is connected to the water inlet of the post-filter element, and a second state in which the water inlet of the post-filter element is connected to the drainage pipeline, when the water purification system executes a water production mode, the third pipeline switching structure is in the first state, and when the water purification system executes the thermal regeneration mode, the third pipeline switching structure is in the second state.

Beneficial effects: The fine filter element can purify the tap water flowing out of the pre-filter element with high precision. The wastewater generated by the purification is discharged from the wastewater outlet, and the purified tap water flows out from the pure water outlet to flow to the post-filter element. Therefore, the fine filter element can improve the water quality of purified tap water. The second pipeline switching structure plays a role in switching the connectivity state of the water outlet of the pre-filter element, and the third pipeline switching structure plays a role in switching the connectivity state of the water inlet of the pre-filter element, so as to realize the switching between the water production mode and the thermal regeneration mode.

In an optional embodiment, the first pipeline switching structure includes a first reversing valve, a water inlet of the first reversing valve is connected to the water inlet of the pre-filter, a first water outlet of the first reversing valve is connected to the tap water inlet, and a second water outlet of the first reversing valve is connected to the drainage pipeline. When the first pipeline switching structure is in the first state, the water inlet of the first reversing valve is connected to the first water outlet of the first reversing valve. When the first pipeline switching structure is in the second state, the water inlet of the first reversing valve is connected to the second water outlet of the first reversing valve.

Beneficial effect: when the first pipeline switching structure is in the first state, the water inlet of the first reversing valve is connected with the first water outlet of the first reversing valve, thereby connecting the water inlet of the pre-filter element and the tap water inlet, so that tap water can flow into the pre-filter element; when the first pipeline switching structure is in the second state, the water inlet of the first reversing valve is connected with the second water outlet of the first reversing valve, thereby connecting the water inlet of the pre-filter element and the drain pipeline, so that the hot water in the pre-filter element can be discharged.

In an optional embodiment, the second pipeline switching structure includes a second reversing valve, a water inlet of the second reversing valve is connected to the water outlet of the pre-filter element, a first water outlet of the second reversing valve is connected to the water inlet of the fine filter element, and a second water outlet of the second reversing valve is connected to the second regeneration pipeline. When the second pipeline switching structure is in the first state, the water inlet of the second reversing valve is connected to the first water outlet of the second reversing valve. When the second pipeline switching structure is in the second state, the water inlet of the second reversing valve is connected to the second water outlet of the second reversing valve.

Beneficial effect: when the second pipeline switching structure is in the first state, the water inlet of the second reversing valve is connected with the first water outlet of the second reversing valve, thereby connecting the water outlet of the pre-filter element and the water inlet of the fine filter element, so that tap water flows from the pre-filter element into the fine filter element; when the second pipeline switching structure is in the second state, the water inlet of the second reversing valve is connected with the second water outlet of the second reversing valve, thereby connecting the water outlet of the pre-filter element and the second regeneration pipeline, so that hot water flows from the second regeneration pipeline into the pre-filter element.

In an optional embodiment, the third pipeline switching structure includes a third reversing valve, a water inlet of the third reversing valve is connected to the water inlet of the post-filter element, a first water outlet of the third reversing valve is connected to the pure water outlet, and a second water outlet of the third reversing valve is connected to the drainage pipeline. When the third pipeline switching structure is in the first state, the water inlet of the third reversing valve is connected to the first water outlet of the third reversing valve. When the third pipeline switching structure is in the second state, the water inlet of the third reversing valve is connected to the second water outlet of the third reversing valve.

Beneficial effect: when the third pipeline switching structure is in the first state, the water inlet of the third reversing valve is connected with the first water outlet of the third reversing valve, thereby connecting the pure water inlet and the water inlet of the post-filter element, so that tap water flows from the fine filter element into the post-filter element; when the third pipeline switching structure is in the second state, the water inlet of the third reversing valve is connected with the second water outlet of the third reversing valve, thereby connecting the water inlet of the post-filter element and the drain pipeline, so that hot water can be discharged from the post-filter element.

In an optional embodiment, the water outlet of the post-filter is connected to the heating water inlet via a post-water outlet pipe, and the fourth pipe switching structure includes a first control valve arranged on the first regeneration pipe and a second control valve arranged on the post-water outlet pipe. When the fourth pipe switching structure is in the first state, the first control valve is closed and the second control valve is opened, and when the fourth pipe switching structure is in the second state, the first control valve is opened and the second control valve is closed.

Beneficial effect: By setting the fourth pipeline switching structure to the form of a first control valve and a second control valve, the on-off of the pipeline is independently controlled by opening and closing the two control valves, thereby realizing switching of different modes with strong control independence.

In an optional embodiment, the second regeneration pipeline is connected to the first regeneration pipeline, and the connection between the second regeneration pipeline and the first regeneration pipeline is located upstream of the first control valve along the hot water flow direction.

Beneficial effect: when only the pre-filter element is reversely hot-flushed, the first control valve is closed to prevent hot water from flowing to the post-filter element, and hot water can only flow through the first regeneration pipeline and the second regeneration pipeline and then flow into the pre-filter element. When only the post-filter element is reversely hot-flushed, the second reversing valve is in the first state to disconnect the second regeneration pipeline, and the first control valve is opened to allow hot water to flow into the post-filter element through the first regeneration pipeline. The second regeneration pipeline is integrated with the first regeneration pipeline, which can save pipeline settings and reduce costs.

In an optional embodiment, the water purification system also includes a pure water tank, which is connected to both the rear water outlet pipe and the second regeneration pipe. When the water purification system executes a cooling mode, the room temperature pure water in the pure water tank flows sequentially through the rear water outlet pipe, the rear filter element water outlet, the rear filter element, the rear filter element water inlet and the drain pipe, and/or flows sequentially through the second regeneration pipe, the pre-filter element water outlet, the pre-filter element, the pre-filter element water inlet and the drain pipe.

Beneficial effect: The pure water tank provided can store the pure water purified by the water purification system in the water production mode, and when the water purification system executes the cooling mode, the room temperature pure water in the pure water tank can be provided to the pre-filter and/or the post-filter to cool them.

In an optional embodiment, the pure water tank has a pure water tank inlet and a pure water tank outlet, the pure water tank inlet is connected to the rear water outlet pipeline, and the pure water tank outlet is connected to the heating water inlet, and the water purification system also includes a cooling pipeline, one end of the cooling pipeline is connected to the pure water tank inlet, and the other end of the cooling pipeline is connected to the first regeneration pipeline, and along the flow direction of hot water, the connection between the cooling pipeline and the first regeneration pipeline is located upstream of the connection between the second regeneration pipeline and the first regeneration pipeline, and the cooling pipeline is provided with a first one-way valve that only allows pure water in the pure water tank to flow from the cooling pipeline to the first regeneration pipeline.

Beneficial effect: The pure water in the pure water tank can also flow through the pure water tank water inlet, the cooling pipeline, the first regeneration pipeline, the second regeneration pipeline, the pre-filter outlet in sequence in the cooling mode and flow into the pre-filter to cool the pre-filter. The setting of the first one-way valve limits the pure water to flow only in the cooling pipeline, and hot water cannot flow from the first regeneration pipeline through the first one-way valve into the cooling pipeline.

In an optional embodiment, a second one-way valve that only allows hot water to flow from the heating device to the pre-filter element and the post-filter element is provided on the first regeneration pipeline, and the second one-way valve is located upstream of the connection between the cooling pipeline and the first regeneration pipeline.

Beneficial effect: The setting of the second one-way valve limits the hot water to flow only from the heating device to the first regeneration pipeline, and during cooling, the pure water in the pure water tank cannot flow into the heating device through the cooling pipeline and the first regeneration pipeline, ensuring the independent operation of the cooling mode and the thermal regeneration mode.

In an optional embodiment, one end of the cooling pipeline away from the first regeneration pipeline is connected to the rear water outlet pipeline, and the second control valve is a fourth reversing valve. When the water purification system executes the water production mode, the fourth reversing valve connects the water inlet of the pure water tank with the rear water outlet pipeline. When the water purification system executes the cooling mode, the fourth reversing valve connects the water inlet of the pure water tank with the rear water outlet pipeline, or connects the water inlet of the pure water tank with the cooling pipeline.

Beneficial effect: when the water purification system executes the water making mode, the fourth reversing valve connects the water inlet of the pure water tank with the rear water outlet pipeline, so that the pure water purified by the rear filter element flows through the water outlet of the rear filter element, the rear water outlet pipeline, and the water inlet of the pure water tank in sequence and flows into the pure water tank; when the water purification system executes the cooling mode, the fourth reversing valve connects the water inlet of the pure water tank with the rear water outlet pipeline, so that the pure water in the pure water tank flows reversely through the pure water tank inlet through the rear water outlet pipeline and flows into the rear filter element to cool the rear filter element, or connects the water inlet of the pure water tank with the cooling pipeline, so that the pure water in the pure water tank flows reversely through the pure water tank inlet through the cooling pipeline, the first regeneration pipeline, and the second regeneration pipeline and flows into the pre-filter element to cool the pre-filter element. It can be seen that the fourth reversing valve can connect the water inlet of the pure water tank with different pipelines to realize the switching of different usage modes.

In an optional embodiment, the water purification system has a working state of performing alternating operation of the thermal regeneration mode and the cooling mode.

Beneficial effect: Through the alternating operation of the hot regeneration mode and the cooling mode, the pre-filter and the post-filter are thermally regenerated-cooled-hot regenerated-cooled. This cycle can not only ensure the active regeneration effect of the pre-filter and the post-filter, but also avoid the pre-filter and the post-filter being damaged due to being in the high-temperature hot regeneration mode for a long time.

In an optional embodiment, the drainage pipeline includes a first drainage branch pipeline, a second drainage branch pipeline and a main drainage pipeline, the first drainage branch pipeline is connected to the water inlet of the pre-filter element, the second drainage branch pipeline is connected to the water inlet of the post-filter element, the main drainage pipeline is connected to the drainage outlet, the main drainage pipeline is connected to both the first drainage branch pipeline and the second drainage branch pipeline, and a drainage valve is provided on the main drainage pipeline.

Beneficial effect: The drain valve is opened in the thermal regeneration mode and the cooling mode. The hot water after flushing the pre-filter or the cooled pure water can flow into the first drainage branch pipe through the water inlet of the pre-filter, and then be discharged to the drain outlet through the main drainage pipe. The hot water after flushing the post-filter or the cooled pure water can flow into the second drainage branch pipe through the water inlet of the post-filter, and then be discharged to the drain outlet through the main drainage pipe.

In an optional embodiment, the thermal regeneration mode also includes a soaking state. In the soaking state, the drain valve is closed, and the pre-filter element and/or the post-filter element is soaked with hot water in the heating device.

Beneficial effect: The present application provides another method for active regeneration of the pre-filter element and/or the post-filter element, namely, in the soaking state, the drain valve is closed, and the hot water from the heating device flows into the pre-filter element and/or the post-filter element and accumulates, and the pre-filter element and/or the post-filter element are hot-soaked with the accumulated hot water, thereby also realizing thermal regeneration of the pre-filter element and/or the post-filter element. Compared with the flushing state, the soaking state can regenerate the pre-filter element and/or the post-filter element for a long time, achieving a more lasting thermal regeneration effect.

In an optional implementation, the wastewater outlet is connected to a wastewater discharge pipeline, and a wastewater valve is provided on the wastewater discharge pipeline.

Beneficial effects: The wastewater discharge pipeline can transport the wastewater generated by the fine filter element to a long distance, and the wastewater valve is used to control the on-off of the wastewater discharge pipeline to achieve pressurized water purification for the fine filter element.

In an optional embodiment, the water purification system further includes a liquid level detector disposed on the pre-filter element and/or the post-filter element, and the liquid level detector is configured to control the opening and closing of the heating device by obtaining the liquid level of the pre-filter element and/or the liquid level of the post-filter element.

Beneficial effect: The liquid level of the pre-filter and/or post-filter in the soaking state is obtained through a liquid level detector, so that when the amount of hot water added reaches the preset liquid level, the heating device is turned off to ensure that the hot water level during soaking meets the requirements and ensure the active regeneration effect of the pre-filter and/or post-filter.

In an optional embodiment, the water purification system also includes a temperature detector and a controller, and the controller is communicatively connected to the temperature detector and the heating device. The temperature detector is suitable for obtaining the temperature value of the hot water so that the controller adjusts the heating power of the heating device according to the temperature value.

Beneficial effect: The temperature of hot water is obtained through the temperature detector, and the water temperature is fed back to the controller in time. The controller can automatically adjust the heating power of the heating device according to the temperature value to ensure that the temperature of the hot water meets the thermal regeneration requirements and ensure the thermal regeneration effect.

In an optional embodiment, the water purification system further comprises a coarse filter element, which is connected in series to the upstream of the pre-filter element through the water production pipeline, and a booster pump is provided on the water production pipeline upstream of the coarse filter element.

Beneficial effect: The tap water flows through the water inlet through the water making pipeline and then flows into the coarse filter element. The coarse filter element can filter out large particles of impurities in the tap water, so that the coarsely filtered tap water flows through the water making pipeline to the water inlet of the pre-filter element. The booster pump provides power for the flow of tap water in the entire water purification system.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 shows a schematic diagram of the overall connection structure of a water purification system in an embodiment of the utility model;

FIG2 is a schematic diagram showing the flow of tap water in the water purification system in the water production mode according to an embodiment of the utility model;

FIG3 is a schematic diagram showing the hot water flow of the water purification system for reverse flushing the pre-filter in the embodiment of the utility model;

FIG4 is a schematic diagram showing the hot water flow of the water purification system in the embodiment of the utility model for reverse flushing the post-filter element;

FIG5 is a schematic diagram showing the pure water flow of the water purification system cooling the pre-filter in the embodiment of the utility model;

FIG6 is a schematic diagram showing the pure water flow of the water purification system for cooling the post-filter element in the embodiment of the utility model.

Description of reference numerals:

1. Pre-filter element; 11. Pre-filter element water inlet; 12. Pre-filter element water outlet; 2. Fine filter element; 21. Fine filter element water inlet; 22. Wastewater outlet; 23. Pure water outlet; 3. Post-filter element; 31. Post-filter element water inlet; 32. Post-filter element water outlet; 4. Heating device; 41. Heating water inlet; 42. Heating water outlet; 5. Pure water tank; 51. Pure water tank water inlet; 52. Pure water tank water outlet; 6. Coarse filter element; 61. Coarse filter water inlet; 62. Coarse filter water outlet;

100, water production pipeline; 101, first reversing valve; 102, second reversing valve; 103, third reversing valve; 104, booster pump; 200, first regeneration pipeline; 201, first control valve; 202, second non-return valve; 300, second regeneration pipeline; 400, post-water outlet pipeline; 401, fourth reversing valve; 500, drainage pipeline; 501, first drainage branch pipeline; 502, second drainage branch pipeline; 503, main drainage pipeline; 5031, drainage valve; 600, cooling pipeline; 601, first non-return valve; 700, wastewater discharge pipeline; 701, wastewater valve; 800, water tank connecting pipeline.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

The following describes an embodiment of the utility model in conjunction with FIG. 1 to FIG. 6 .

According to an embodiment of the utility model, as shown in FIG1 , a water purification system is provided, including a water making device, a heating device 4, a backwashing pipe and a control valve group, the water making device includes a water making pipeline 100 and a pre-filter 1 and a post-filter 3 sequentially connected to the water making pipeline 100, the pre-filter 1 and the post-filter 3 both include a carbon water purification unit, the pre-filter 1 has a pre-filter water inlet 11 and a pre-filter water outlet 12, the post-filter 3 has a post-filter water inlet 31 and a post-filter water outlet 32, the heating device 4 has a heating water inlet 41 and a heating water outlet 42, the heating water outlet 42 is connected to the water intake end, the backwashing pipeline includes a first recirculation pipe connected in parallel to the heating water outlet 42 and the post-filter water outlet 32 The water production pipeline 200, and the second regeneration pipeline 300 connected in parallel between the heating water outlet 42 and the pre-filter water outlet 12, and the drainage pipeline 500 respectively connected to the post-filter water inlet 31 and the pre-filter water inlet 11, the control valve group is arranged on the water production pipeline 100 and the backwash pipeline, which is suitable for controlling the water purification system to perform the thermal regeneration mode, and controlling the hot water to flow through the heating water outlet 42, the first regeneration pipeline 200, the post-filter water outlet 32, the post-filter 3, the post-filter water inlet 31 and the drainage pipeline 500 in sequence, and/or to flow through the heating water outlet 42, the second regeneration pipeline 300, the pre-filter water outlet 12, the pre-filter 1, the pre-filter water inlet 11 and the drainage pipeline 500 in sequence.

In the water purification system of this embodiment, tap water flows into the pre-filter element 1 and the post-filter element 3 in sequence through the water production pipeline 100 to achieve tap water purification, and by connecting the first regeneration pipeline 200 in parallel between the heating water outlet 42 and the post-filter element water outlet 32, and connecting the second regeneration pipeline 300 in parallel between the heating water outlet 42 and the pre-filter element water outlet 12, and setting a drainage pipeline 500 respectively connected to the post-filter element water inlet 31 and the pre-filter element water inlet 11, the water purification system can execute the thermal regeneration mode according to the use of the pre-filter element 1 and the post-filter element 3. When the control valve group When the water purification system is controlled to execute the thermal regeneration mode, the hot water in the heating device 4 can be reversely input into the pre-filter element 1 and/or the post-filter element 3 to perform reverse thermal flushing and regeneration. The hot water not only has a flushing effect, but also can break the balance between the activated carbon and the pollutant adsorbate, so that the pollutants are analyzed and desorbed, thereby allowing the carbon water purification unit to restore part of its adsorption capacity and achieve the regeneration of the pre-filter element 1 and the post-filter element 3, thereby extending the service life of the pre-filter element 1 and the post-filter element 3, reducing their replacement frequency, and reducing costs. At the same time, it also increases the rated water purification volume of the entire water purification system, with excellent economic benefits.

It is understandable that the water purification system can execute the thermal regeneration mode according to the use of the pre-filter 1 and the post-filter 3, which specifically includes: when only the pre-filter 1 is used and the degree of pollution is relatively high, when the thermal regeneration mode is executed, hot water flows through the heating outlet 42, the second regeneration pipeline 300, the pre-filter outlet 12, the pre-filter 1, the pre-filter inlet 11 and the drainage pipeline 500 in sequence to achieve active regeneration of the pre-filter 1; when only the post-filter 3 is used and the degree of pollution is relatively high, when the thermal regeneration mode is executed, hot water flows through the heating outlet 42, the first regeneration pipeline 200, the post-filter outlet 32, the post-filter 3, the water inlet 31 of the post-filter element and the drain pipe 500, so as to realize the active regeneration of the post-filter element 3; when the degree of pollution of the pre-filter element 1 and the post-filter element 3 is relatively large, when the thermal regeneration mode is executed, the hot water flows through the heating water outlet 42, the first regeneration pipe 200, the water outlet 32 of the post-filter element, the post-filter element 3, the water inlet 31 of the post-filter element and the drain pipe 500 in sequence, and flows through the heating water outlet 42, the second regeneration pipe 300, the water outlet 12 of the pre-filter element, the pre-filter element 1, the water inlet 11 of the pre-filter element and the drain pipe 500 in sequence, so as to realize the active regeneration of the pre-filter element 1 and the post-filter element 3 at the same time.

When the water production pipeline 100 is in the water production mode of the water purification system, tap water flows forward along the water production pipeline 100 and flows through the pre-filter 1 and the post-filter 3 in sequence to be purified one by one. When the hot water is in the heat regeneration mode, the hot water flows in the reverse direction, that is, the flow direction of the hot water is opposite to that of the tap water.

In this embodiment, the pre-filter 1 is an activated carbon filter element, which includes multiple carbon water purification units and can effectively remove oxidizing substances such as residual chlorine. However, during long-term operation, the surface of the activated carbon filter element may breed bacteria and form biofilms, resulting in a decrease in water purification performance and may even directly contaminate the purified water. In the thermal regeneration mode, hot water can be used to rinse and disinfect the activated carbon filter element to achieve active regeneration, thereby extending the service life of the activated carbon filter element, reducing the frequency of replacement, and achieving the purpose of saving economic costs.

Of course, in some embodiments, the pre-filter element 1 can also be set as a composite filter element composed of a first-level PP cotton, ultrafiltration and activated carbon in series. The composite filter element can not only filter colloids, heavy metals and sediment particles, but also remove oxidizing substances such as residual chlorine.

The post-filter element 3 receives the tap water filtered by the pre-filter element 1 and can filter the tap water again to remove trace elements, adjust pH and drinking taste.

Specifically, the post-filter element 3 may also be an activated carbon filter element including a plurality of carbon water purification units.

The heating device 4 is used to heat tap water to generate hot water for thermal regeneration of the pre-filter element 1 and/or the post-filter element 3. Specifically, the heating device 4 can be a heating tank or a heating box, etc. The heating water inlet 41 and the heating water outlet 42 are arranged on the housing of the heating device 4, and the heating water outlet 42 is connected to the water intake end for users to take hot water.

It should be noted that the temperature of the hot water used in the heat regeneration mode of this embodiment is higher than normal temperature and lower than the boiling point of water.

The first regeneration pipeline 200 connects the heating water outlet 42 and the post-filter element water outlet 32 , and can transport the hot water in the heating device 4 to the post-filter element 3 through the first regeneration pipeline 200 in the thermal regeneration mode to achieve active regeneration of the post-filter element 3 .

The second regeneration pipeline 300 connects the heating water outlet 42 and the pre-filter outlet 12 , and can transport the hot water in the heating device 4 to the pre-filter 1 through the second regeneration pipeline 300 over a long distance in the thermal regeneration mode to achieve active regeneration of the pre-filter 1 .

The drainage pipeline 500 is connected to the pre-filter water inlet 11 and the post-filter water inlet 31 respectively, and can timely discharge the hot water generated by flushing the pre-filter 1 and the post-filter 3 in the thermal regeneration mode to achieve continuous flushing and regeneration of the pre-filter 1 and the post-filter 3.

In this embodiment, the water purification system further includes a fine filter element 2, which is connected in series between the pre-filter element 1 and the post-filter element 3 through a water production pipeline 100, and has a fine filter element water inlet 21, a pure water inlet 23, and a waste water inlet 22. The fine filter element 2 can purify the tap water flowing out of the pre-filter element 1 with high precision, and the waste water generated by purification is discharged from the waste water inlet 22, and the purified tap water flows out from the pure water inlet 23 to flow to the post-filter element 3, so the fine filter element 2 can improve the water quality of the purified tap water.

Compared with the pre-filter element 1 and the post-filter element 3, the fine filter element 2 has a higher filtration accuracy and is the core treatment filter element of the water purification system. The fine filter element 2 can be a reverse osmosis membrane filter element, an RO membrane filter element, etc., which is selected according to the filtration accuracy requirements and is not specifically limited in this embodiment.

The control valve group of this embodiment also includes a first pipeline switching structure, which has a first state of connecting the pre-filter cartridge water inlet 11 with the tap water inlet and a second state of connecting the pre-filter cartridge water inlet 11 with the drainage pipeline 500. According to the above configuration, when the water purification system performs the water production mode, the first pipeline switching structure is in the first state, and the tap water flows through the tap water inlet, the water production pipeline 100, and the pre-filter cartridge water inlet 11 in sequence to enter the pre-filter cartridge 1 for purification. When the water purification system performs the thermal regeneration mode, the first pipeline switching structure is in the second state, and the hot water after flushing in the pre-filter cartridge 1 can flow from the pre-filter cartridge water inlet 11 into the drainage pipeline 500 for discharge. Therefore, the first pipeline switching structure plays a role in switching the connection state of the pre-filter cartridge water inlet 11 to achieve the switching between the water production mode and the thermal regeneration mode.

The first pipeline switching structure includes a first reversing valve 101, a water inlet of the first reversing valve 101 is connected to the water inlet 11 of the pre-filter element, a first water outlet of the first reversing valve 101 is connected to the tap water inlet, and a second water outlet of the first reversing valve 101 is connected to the drain pipeline 500. When the first pipeline switching structure is in a first state, the water inlet of the first reversing valve 101 is connected to the first water outlet of the first reversing valve 101, thereby connecting the water inlet 11 of the pre-filter element and the tap water inlet, so that tap water can flow into the pre-filter element 1. When the first pipeline switching structure is in a second state, the water inlet of the first reversing valve 101 is connected to the second water outlet of the first reversing valve 101, thereby connecting the water inlet 11 of the pre-filter element and the drain pipeline 500, so that the hot water in the pre-filter element 1 can be discharged.

The first reversing valve 101 may specifically be a two-way valve.

In this embodiment, the control valve group also includes a second pipeline switching structure, which has a first state of connecting the pre-filter cartridge water outlet 12 with the fine filter cartridge water inlet 21, and a second state of connecting the pre-filter cartridge water outlet 12 with the second regeneration pipeline 300. According to the above configuration, when the water purification system performs the water production mode, the second pipeline switching structure is in the first state, and the tap water purified by the pre-filter cartridge 1 flows through the pre-filter cartridge water outlet 12, the second pipeline switching structure, and the fine filter cartridge water inlet 21 in sequence to enter the fine filter cartridge 2 for high-precision purification. When the water purification system performs the hot regeneration mode, the second pipeline switching structure is in the second state, and the hot water of the second regeneration pipeline 300 flows through the second pipeline switching structure and the pre-filter cartridge water outlet 12 in sequence to flow into the pre-filter cartridge 1, realizing the reverse hot flushing of the pre-filter cartridge 1, so the second pipeline switching structure plays a role in switching the connection state of the pre-filter cartridge water outlet 12 to realize the switching between the water production mode and the hot regeneration mode.

Optionally, the second pipeline switching structure includes a second reversing valve 102, the water inlet of the second reversing valve 102 is connected to the water outlet 12 of the pre-filter element, the first water outlet of the second reversing valve 102 is connected to the water inlet 21 of the fine filter element, and the second water outlet of the second reversing valve 102 is connected to the second regeneration pipeline 300. When the second pipeline switching structure is in a first state, the water inlet of the second reversing valve 102 is connected to the first water outlet of the second reversing valve 102, thereby connecting the water outlet 12 of the pre-filter element and the water inlet 21 of the fine filter element, so that tap water flows from the pre-filter element 1 to the fine filter element 2. When the second pipeline switching structure is in a second state, the water inlet of the second reversing valve 102 is connected to the second water outlet of the second reversing valve 102, thereby connecting the water outlet 12 of the pre-filter element and the second regeneration pipeline 300, so that hot water flows from the second regeneration pipeline 300 into the pre-filter element 1.

The second reversing valve 102 may specifically be a two-way valve.

In this embodiment, the control valve group also includes a third pipeline switching structure, which has a first state of connecting the pure water port 23 with the water inlet 31 of the post-filter element, and a second state of connecting the water inlet 31 of the post-filter element with the drainage pipeline 500. According to the above configuration, when the water purification system performs the water production mode, the third pipeline switching structure is in the first state, and the tap water purified by the fine filter element 2 flows through the pure water port 23, the third pipeline switching structure, and the water inlet 31 of the post-filter element in sequence to enter the post-filter element 3 for re-purification. When the water purification system performs the thermal regeneration mode, the third pipeline switching structure is in the second state, so as to discharge the hot water in the post-filter element 3 to the drainage pipeline 500 through the water inlet 31 of the post-filter element. Therefore, the third pipeline switching structure plays a role in switching the connection state of the water inlet 31 of the post-filter element to realize the switching between the water production mode and the thermal regeneration mode.

Correspondingly, the third pipeline switching structure includes a third reversing valve 103, the water inlet of the third reversing valve 103 is connected to the water inlet 31 of the post-filter element, the first water outlet of the third reversing valve 103 is connected to the pure water port 23, and the second water outlet of the third reversing valve 103 is connected to the drainage pipeline 500. When the third pipeline switching structure is in a first state, the water inlet of the third reversing valve 103 is connected to the first water outlet of the third reversing valve 103, thereby connecting the pure water port 23 and the water inlet 31 of the post-filter element, so that tap water flows from the fine filter element 2 into the post-filter element 3. When the third pipeline switching structure is in a second state, the water inlet of the third reversing valve 103 is connected to the second water outlet of the third reversing valve 103, thereby connecting the water inlet 31 of the post-filter element and the drainage pipeline 500, so that hot water is discharged from the post-filter element 3.

The third reversing valve 103 may specifically be a two-way valve.

In this embodiment, the control valve group also includes a fourth pipeline switching structure, which has a first state in which the water outlet 32 of the post-filter element is connected to the heating water inlet 41, and a second state in which the water outlet 32 of the post-filter element is connected to the first regeneration pipeline 200. When the water purification system executes the water production mode, the fourth pipeline switching structure is in the first state to connect the water outlet 32 of the post-filter element with the heating water inlet 41, so that the purified tap water flows through the fourth pipeline switching structure and the heating water inlet 41 into the heating device 4. When the water purification system executes the hot regeneration mode, the fourth pipeline switching structure is in the second state, so that the water outlet 32 of the post-filter element is connected to the first regeneration pipeline 200, so that the hot water in the first regeneration pipeline 200 flows back to the post-filter element 3 through the four-pipe switching structure and the water outlet 32 of the post-filter element to realize hot flushing.

The post-filter water outlet 32 is connected to the heating water inlet 41 through the post-filter water outlet pipeline 400, so that the tap water purified in the post-filter 3 flows through the post-filter water outlet 32, the post-filter water outlet pipeline 400, and the heating water inlet 41 in sequence and flows into the heating device 4.

In this embodiment, the fourth pipeline switching structure includes a first control valve 201 arranged on the first regeneration pipeline 200 and a second control valve arranged on the rear water outlet pipeline 400. When the fourth pipeline switching structure is in the first state, the first control valve 201 is closed and the second control valve is opened, that is, the first regeneration pipeline 200 is disconnected and the rear water outlet pipeline 400 is connected, thereby realizing tap water purification. When the fourth pipeline switching structure is in the second state, the first control valve 201 is opened and the second control valve is closed, that is, the first regeneration pipeline 200 is connected and the rear water outlet pipeline 400 is disconnected, thereby realizing hot water flowing into the rear filter element 3 for hot flushing.

In this embodiment, in order to save pipeline settings and reduce costs, the second regeneration pipeline 300 is connected to the first regeneration pipeline 200, and the connection between the second regeneration pipeline 300 and the first regeneration pipeline 200 is located upstream of the first control valve 201 along the hot water flow direction. When only the pre-filter element 1 is reversely hot-washed, the first control valve 201 is closed to prevent hot water from flowing to the post-filter element 3, and hot water can only flow through the first regeneration pipeline 200 and the second regeneration pipeline 300 and then flow into the pre-filter element 1. When only the post-filter element 3 is reversely hot-washed, the second reversing valve 102 is in the first state to disconnect the second regeneration pipeline 300, and the first control valve 201 is opened to allow hot water to flow into the post-filter element 3 through the first regeneration pipeline 200.

The first control valve 201 is specifically a switch valve, which is used to control the on-off of the first regeneration pipeline 200 .

In this embodiment, the end of the first regeneration pipeline 200 away from the heating device 4 is connected to the rear water outlet pipeline 400 and the connection between the first regeneration pipeline 200 and the rear water outlet pipeline 400 is located upstream of the second control valve along the flow direction of the tap water production mode.

The water purification system of this embodiment further includes a pure water tank 5, which is connected to both the rear water outlet pipeline 400 and the second regeneration pipeline 300. When the water purification system executes the cooling mode, the room temperature pure water in the pure water tank 5 flows sequentially through the rear water outlet pipeline 400, the rear filter element water outlet 32, the rear filter element 3, the rear filter element water inlet 31 and the drainage pipeline 500, and/or flows sequentially through the second regeneration pipeline 300, the pre-filter element water outlet 12, the pre-filter element 1, the pre-filter element water inlet 11 and the drainage pipeline 500, so as to realize the cooling of the pre-filter element 1 and/or the rear filter element 3, and avoid the pre-filter element 1 and/or the rear filter element 3 from being too high in temperature and affecting the normal water production.

It is understandable that the cooling mode is generally executed after the thermal regeneration mode is running, so as to cool the pre-filter element 1 and/or the post-filter element 3 that generate high temperature in the thermal regeneration mode. Only after cooling can the water purification system enter the water production mode.

Furthermore, the pure water tank 5 has a pure water tank water inlet 51 and a pure water tank water outlet 52. The pure water tank water inlet 51 is connected to the rear water outlet pipeline 400, and the pure water tank water outlet 52 is connected to the heating water inlet 41. In the water production mode, the pure water tank 5 can flow the tap water purified by the system into the pure water tank 5 through the rear water outlet pipeline 400 and the pure water tank water inlet 51 to achieve storage, and the pure water tank water outlet 52 is connected to the heating water inlet 41, so that the pure water in the pure water tank 5 can be input into the heating device 4 for heating, so that the user can use it or use it in the heat regeneration mode. The pure water in the pure water tank 5 can also flow through the pure water tank water inlet 51, the rear water outlet pipeline 400, and the rear filter element water outlet 32 in sequence in the cooling mode to flow into the rear filter element 3 to cool the rear filter element 3.

It is understandable that the pure water tank 5 can be arranged in a variety of forms. For example, the pure water tank 5 in a desktop water purifier needs an external drive pump for water extraction or regeneration; the pure water tank 5 in a commercial water purifier is a pressure barrel mode, which does not require an external drive pump, can store a certain volume of purified water, and is driven by pressure for water extraction or regeneration. In this technical solution, the pure water tank 5 is embodied in the form of a pure water tank 5 plus a drive pump.

In this embodiment, the water purification system also includes a cooling pipeline 600, one end of which is connected to the water inlet 51 of the pure water tank, and the other end of the cooling pipeline 600 is connected to the first regeneration pipeline 200, and the connection between the cooling pipeline 600 and the first regeneration pipeline 200 is located upstream of the connection between the second regeneration pipeline 300 and the first regeneration pipeline 200 along the flow direction of hot water, and a first one-way valve 601 is provided on the cooling pipeline 600, which only allows pure water in the pure water tank 5 to flow from the cooling pipeline 600 to the first regeneration pipeline 200. The pure water in the pure water tank 5 can also flow through the pure water tank water inlet 51, the cooling pipeline 600, the first regeneration pipeline 200, the second regeneration pipeline 300, and the pre-filter outlet 12 in sequence in the cooling mode and flow into the pre-filter 1 to cool the pre-filter 1. The setting of the first one-way valve 601 limits the pure water to flow only in the cooling pipeline 600, and hot water cannot flow from the first regeneration pipeline 200 through the first one-way valve 601 into the cooling pipeline 600.

In addition, the first regeneration pipeline 200 of this embodiment is provided with a second one-way valve 202 that only allows hot water to flow from the heating device 4 to the front filter element 1 and the rear filter element 3. The second one-way valve 202 is located upstream of the connection between the cooling pipeline 600 and the first regeneration pipeline 200. The setting of the second one-way valve 202 limits the hot water to flow only from the heating device 4 to the first regeneration pipeline 200, and during cooling, the pure water in the pure water tank 5 cannot flow into the heating device 4 through the cooling pipeline 600 and the first regeneration pipeline 200, thereby ensuring the independent operation of the cooling mode and the thermal regeneration mode. It is not difficult to understand that, as a replacement for the same structure, the first one-way valve 601 and the second one-way valve 202 can also be set as ordinary stop valves, and the cooling pipeline 600 and the first thermal regeneration pipe are connected or disconnected by controlling the opening and closing of the stop valves, which is not limited to the solution of this embodiment.

In order to further improve the integration of the system pipeline, the end of the cooling pipeline 600 away from the first regeneration pipeline 200 is connected to the rear water outlet pipeline 400, and the second control valve is the fourth reversing valve 401. When the water purification system executes the water production mode, the fourth reversing valve 401 connects the pure water tank water inlet 51 with the rear water outlet pipeline 400, so that the pure water purified by the rear filter element 3 flows through the rear filter element water outlet 32, the rear water outlet pipeline 400, and the pure water tank water inlet 51 into the pure water tank 5 in sequence. When the water purification system executes the cooling mode, the fourth reversing valve 401 connects the pure water tank water inlet 51 with the rear water outlet pipeline 400. The four-way reversing valve 401 connects the pure water tank water inlet 51 with the rear water outlet pipe 400, so that the pure water in the pure water tank 5 can flow reversely through the pure water tank water inlet 51 through the rear water outlet pipe 400 and flow into the rear filter element 3 to cool the rear filter element 3, or connects the pure water tank water inlet 51 with the cooling pipe 600, so that the pure water in the pure water tank 5 can flow reversely through the pure water tank water inlet 51 through the cooling pipe 600, the first regeneration pipe 200, and the second regeneration pipe 300 and flow into the pre-filter element 1 to cool the pre-filter element 1.

In this embodiment, the water purification system has a working state of performing alternating operation of the thermal regeneration mode and the cooling mode. Through the alternating operation of the thermal regeneration mode and the cooling mode, the pre-filter element 1 and the post-filter element 3 are thermally regenerated-cooled-thermally regenerated-cooled, and this cycle can ensure the active regeneration effect of the pre-filter element 1 and the post-filter element 3, and avoid the pre-filter element 1 and the post-filter element 3 being damaged by being in the high-temperature thermal regeneration mode for a long time.

The pure water tank outlet 52 and the heating water inlet 41 are connected via the water tank connecting pipe 800 , so that the pure water in the pure water tank 5 flows through the pure water tank outlet 52 , the water tank connecting pipe 800 , and the heating water inlet 41 in sequence and flows into the heating device 4 .

In this embodiment, the drainage pipeline 500 includes a first drainage branch pipeline 501, a second drainage branch pipeline 502 and a drainage main pipeline 503. The first drainage branch pipeline 501 is connected to the pre-filter element water inlet 11, the second drainage branch pipeline 502 is connected to the post-filter element water inlet 31, the drainage main pipeline 503 is connected to the drainage outlet, the drainage main pipeline 503 is connected to both the first drainage branch pipeline 501 and the second drainage branch pipeline 502, and a drainage valve 5031 is provided on the drainage main pipeline 503. The drainage valve 5031 is opened in the hot regeneration mode and the cooling mode, and the hot water after flushing the pre-filter element 1 or the cooled pure water can flow into the first drainage branch pipeline 501 through the pre-filter element water inlet 11, and then be discharged to the drainage outlet through the drainage main pipeline 503, and the hot water after flushing the post-filter element 3 or the cooled pure water can flow into the second drainage branch pipeline 502 through the post-filter element water inlet 31, and then be discharged to the drainage outlet through the drainage main pipeline 503.

In some embodiments, the pre-filter element 1 and the post-filter element 3 can also drain water through two independent pipelines respectively. Drain valves 5031 are respectively set on the two independent pipelines to control the on-off of the pipelines, which can also play the same role as in this embodiment.

In this embodiment, the thermal regeneration mode also includes a soaking state, in which the drain valve 5031 is closed, and the pre-filter element 1 and/or the post-filter element 3 are soaked with hot water in the heating device 4. The present application provides another way to actively regenerate the pre-filter element 1 and/or the post-filter element 3, that is, in the soaking state, the drain valve 5031 is closed, and the hot water in the heating device 4 flows into the pre-filter element 1 and/or the post-filter element 3 and accumulates, and the pre-filter element 1 and/or the post-filter element 3 are thermally soaked with the accumulated hot water, thereby also realizing thermal regeneration of the pre-filter element 1 and/or the post-filter element 3. Compared with the flushing state, the soaking state can regenerate the pre-filter element 1 and/or the post-filter element 3 for a long time, achieving a more lasting thermal regeneration effect.

It should be noted here that when the soaking state reaches a certain length of time, the drain valve 5031 needs to be opened to discharge the hot water after soaking through the drain pipe 500.

Optionally, the duration of the immersion state can be set as needed, for example, setting the immersion time to 30 minutes, 1 hour, or other time periods, which is not specifically limited in this embodiment.

Therefore, in the water purification system of the present embodiment, the thermal regeneration mode includes two methods, namely, back flushing and immersion. The user can select any one of them according to the degree of contamination of the pre-filter 1 and the post-filter 3. For example, if the pre-filter 1 and the post-filter 3 are lightly contaminated or only a short-term disinfection of the pre-filter 1 and the post-filter 3 is desired, back flushing is used for thermal regeneration. If the pre-filter 1 and the post-filter 3 are heavily contaminated or a long-term regeneration of the pre-filter 1 and the post-filter 3 is desired, immersion is used for thermal regeneration. Therefore, both methods can be selected according to actual needs.

Furthermore, the wastewater outlet 22 is connected to a wastewater discharge pipeline 700, on which a wastewater valve 701 is disposed. The wastewater discharge pipeline 700 can transport the wastewater generated by the fine filter element 2 over a long distance, and the wastewater valve 701 is used to control the on-off of the wastewater discharge pipeline 700 to achieve pressurized water purification for the fine filter element 2.

In order to further enhance the pipeline integration and reduce the pipeline setting volume, the first drainage branch pipeline 501 of this embodiment is connected to the water production pipeline 100 upstream of the pre-filter element 1, the second drainage branch pipeline 502 is connected to the water production pipeline 100 between the fine filter element 2 and the post-filter element 3, the wastewater discharge pipeline 700 is connected to the main drainage pipeline 503 and the connection point is located downstream of the drain valve 5031, and the second regeneration pipeline 300 is connected to the water production pipeline 100 between the pre-filter element 1 and the fine filter element 2.

Preferably, the first reversing valve 101 is arranged at the connection between the first drainage branch pipeline 501 and the water supply pipeline 100 upstream of the pre-filter element 1, the second reversing valve 102 is arranged at the connection between the second regeneration pipeline 300 and the water supply pipeline 100 between the pre-filter element 1 and the fine filter element 2, and the third reversing valve 103 is arranged at the connection between the second drainage branch pipeline 502 and the water supply pipeline 100 between the fine filter element 2 and the post-filter element 3.

It should be noted here that, in some embodiments, the first pipeline switching structure can also be configured to respectively set switch valves on the first drainage branch pipeline 501 and the water production pipeline 100 upstream of the pre-filter 1. In the water production mode, the switch valve on the water production pipeline 100 is opened and the switch valve on the first drainage branch pipeline 501 is closed. In the thermal regeneration mode, the switch valve on the water production pipeline 100 is closed and the switch valve on the first drainage branch pipeline 501 is opened, which can also play the same role as the present embodiment.

Similarly, in some embodiments, the second pipeline switching structure and the third pipeline switching structure can be set in other forms with reference to the first pipeline switching structure, which will not be repeated here.

In addition to the above-mentioned configuration, the water purification system also includes a liquid level detector arranged on the pre-filter element 1 and/or the post-filter element 3, and the liquid level detector is configured to control the opening and closing of the heating device 4 by obtaining the liquid level of the pre-filter element 1 and/or the liquid level of the post-filter element 3.

The above-mentioned setting obtains the liquid level of the pre-filter element 1 and/or the post-filter element 3 in the soaking state through the liquid level detector, so that when the amount of hot water added reaches the preset liquid level, the heating device 4 is turned off to ensure that the hot water level during soaking meets the requirements, thereby ensuring the active regeneration effect of the pre-filter element 1 and/or the post-filter element 3.

The heating device 4 can be configured as a hot tank with a certain pressure, and the hot tank drives the heated hot water to flow by its own pressure. Here, the opening and closing of the heating device 4 is controlled according to the liquid level detected by the liquid level detector, which actually controls the opening and closing of the heated water outlet of the hot tank. Of course, a pressure pump can also be configured in the heating device 4 to pump the hot water to flow. Here, the opening and closing of the heating device 4 is controlled according to the liquid level detected by the liquid level detector, which actually controls the opening and closing of the pressure pump.

Specifically, liquid level detectors may be respectively provided on the pre-filter element 1 and the post-filter element 3 to detect the liquid levels of the pre-filter element 1 and the post-filter element 3 respectively.

Preferably, the preset liquid level may be a liquid level that at least covers one-half or two-thirds of the pre-filter element 1 and/or the post-filter element 3 , and this embodiment does not impose any specific limitation.

The water purification system also includes a temperature detector and a controller. The controller is in communication with the temperature detector and the heating device 4. The temperature detector is suitable for obtaining the temperature value of the hot water so that the controller can adjust the heating power of the heating device 4 according to the temperature value. The temperature of the hot water is obtained by the temperature detector, and the water temperature is fed back to the controller in time. The controller can automatically adjust the heating power of the heating device 4 according to the temperature value to ensure that the temperature of the hot water meets the thermal regeneration requirements and ensure the thermal regeneration effect.

Specifically, when the temperature detector detects that the temperature of the hot water is too low, the controller increases the heating power of the heating device 4 to quickly heat the tap water. When the temperature detector detects that the temperature of the hot water is too high, the controller reduces the heating power of the heating device 4. The hot water temperature will be lowered and the loss of the heating device 4 can also be reduced.

As for the specific setting position, the temperature detector can be set on the pre-filter element 1 and the post-filter element 3, or can be set on the first regeneration pipeline 200 and the second regeneration pipeline 300 respectively, or can be set on the heating device 4. It can be set according to specific needs, and this embodiment does not make specific restrictions.

In addition, it is understandable that water can also be added into the heating device 4 through the pure water tank 5 to mix the pure water with the hot water, which can also achieve the adjustment of the temperature of the hot water in the heating device 4.

In this embodiment, the water purification system further includes a coarse filter cartridge 6, which is connected in series to the upstream of the pre-filter cartridge 1 through a water production pipeline 100, and a booster pump 104 is provided on the water production pipeline 100 upstream of the coarse filter cartridge 6. The tap water flows through the water production pipeline 100 through the tap water inlet and then flows into the coarse filter cartridge 6. The coarse filter cartridge 6 can filter large particles of impurities in the tap water, so that the coarsely filtered tap water flows to the pre-filter cartridge water inlet 11 through the water production pipeline 100, and the booster pump 104 provides power for the flow of tap water in the entire water purification system.

Specifically, the coarse filtration filter element 6 has a coarse filtration water inlet 61 and a coarse filtration water outlet 62, wherein the coarse filtration water inlet 61 is connected to the tap water inlet through the water production pipeline 100, and the coarse filtration water outlet 62 is connected to the pre-filter element water inlet 11 through the water production pipeline 100.

Optionally, the coarse filter element 6 may be PP cotton or a dense filter mesh to intercept large particles of impurities in the tap water and reduce the filtering load on the pre-filter element 1 that is subsequently arranged.

To facilitate understanding of the water purification system of this embodiment, the use process is now introduced as follows:

In the water production mode, as shown in FIG2 , the direction indicated by the thick line segment and the arrow in FIG2 is the flow direction of the tap water in the water production mode, the booster pump 104 and the waste water valve 701 are both opened, the drain valve 5031 is closed, the first pipeline switching structure, the second pipeline switching structure, the third pipeline switching structure and the fourth pipeline switching structure are all in the first state, and the tap water flows into the water production pipeline 100 through the tap water inlet, and flows through the coarse filter element 6 for coarse filtration, flows through the pre-filter element 1 for coarse filtration, and flows through the pre-filter element 6 for coarse filtration. The tap water is purified twice, flows through the fine filter element 2, and the tap water filtered twice is filtered with high precision. The waste water generated by the filtration is discharged into the waste water discharge pipeline 700 through the waste water port 22. The filtered tap water flows into the post-filter element 3 through the pure water port 23 for filtration and pH value adjustment. The obtained pure water flows through the post-water outlet pipeline 400 into the pure water tank 5 for storage. The pure water in the pure water tank 5 can flow into the heating device 4 through the water tank connecting pipeline 800 for heating, and the heated hot water can flow to the water intake end for use;

When the pre-filter element 1 is backwashed in the hot regeneration mode, as shown in FIG3 , the direction indicated by the thick line segment and the arrow in FIG3 is the flow direction of the hot water for backwashing the pre-filter element 1, the drain valve 5031 is opened, the first control valve 201 is closed, the first pipeline switching structure and the second pipeline switching structure are both switched to the second state, and the pure water in the pure water tank 5 flows into the heating device 4 through the water tank connecting pipeline 800 to be heated into hot water, and the hot water flows through the heating water outlet 42, the first regeneration pipeline 200, the second regeneration pipeline 300, the second reversing valve 102, the pre-filter element water outlet 12, the pre-filter element 1, the pre-filter element water inlet 11, the first reversing valve 101, and the drain pipeline 500 in sequence to realize the reverse hot flushing of the pre-filter element 1 and realize active regeneration;

When the pre-filter element 1 is soaked in the heat regeneration mode, it is only necessary to close the drain valve 5031 to allow hot water to flow into the pre-filter element 1 according to the above flow path. When the liquid level detector detects that the hot water level reaches the preset level, the driving pump of the heating device 4 is turned off, and the pre-filter element 1 is soaked in hot water. After soaking for a certain period of time, the drain valve 5031 is opened to discharge the soaked hot water.

When the post-filter element 3 is backwashed in the hot regeneration mode, as shown in FIG4 , the direction indicated by the thick line segment and the arrow in FIG4 is the flow direction of the hot water for backwashing the post-filter element 3, the drain valve 5031 and the first control valve 201 are opened, the second pipeline switching structure is switched to the first state, the third pipeline switching structure is switched to the second state, the fourth reversing valve 401 connects the pure water tank water inlet 51 and the cooling pipeline 600, and the pure water in the pure water tank 5 flows into the heating device 4 through the water tank connecting pipeline 800 to be heated into hot water, and the hot water flows through the heating outlet 42, the first regeneration pipeline 200, the post-water outlet pipeline 400, the post-filter element outlet 32, the post-filter element 3, the post-filter element water inlet 31, the third reversing valve 103, and the drain pipeline 500 in sequence to realize the reverse hot flushing of the post-filter element 3 and realize active regeneration;

When the post-filter element 3 is soaked in the heat regeneration mode, it is only necessary to close the drain valve 5031 to allow hot water to flow into the post-filter element 3 according to the above-mentioned flow path. When the liquid level detector detects that the hot water level of the post-filter element 3 reaches the preset liquid level, the driving pump of the heating device 4 is turned off, and the post-filter element 3 is soaked in hot water. After soaking for a certain period of time, the drain valve 5031 is opened to discharge the soaked hot water.

In the heat regeneration mode, the temperature of the hot water can be detected by a temperature detector to adjust the heating power of the heating device 4 according to the hot water temperature, or water can be added to the heating device 4 through the pure water tank 5 to achieve the control of the water temperature at a suitable temperature for heat regeneration;

When the pre-filter element 1 is cooled, as shown in FIG5 , the direction indicated by the thick line segment and the arrow in FIG5 is the flow direction of the pure water during reverse cooling, the drain valve 5031 is opened, the first control valve 201 is closed, the first pipeline switching structure and the second pipeline switching structure are both switched to the second state, and the fourth reversing valve 401 connects the pure water tank water inlet 51 with the cooling pipeline 600, and the pure water in the pure water tank 5 flows through the pure water tank water inlet 51, the fourth reversing valve 401, the cooling pipeline 600, the first regeneration pipeline 200, the second regeneration pipeline 300, the second reversing valve 102, the pre-filter element water outlet 12, the pre-filter element 1, the pre-filter element water inlet 11, the first reversing valve 101, and the drain pipeline 500 in sequence to achieve flushing and cooling of the pre-filter element 1;

When the post-filter element 3 is cooled, as shown in Figure 6, the direction indicated by the thick line segment and the arrow in Figure 6 is the flow direction of pure water during reverse cooling, the drain valve 5031 is opened, the first control valve 201 is closed, the second pipeline switching structure is switched to the first state, the third pipeline switching structure is switched to the second state, and the fourth reversing valve 401 connects the pure water tank inlet 51 and the post-water inlet pipeline. The pure water in the pure water tank 5 flows through the pure water tank inlet 51, the fourth reversing valve 401, the post-water outlet pipeline 400, the post-filter element outlet 32, the post-filter element 3, the post-filter element inlet 31, the third reversing valve 103, and the drain pipeline 500 in turn to achieve flushing and cooling of the post-filter element 3.

It should be noted that the above-described usage process is a process of independently thermally regenerating and cooling the pre-filter element 1 and the post-filter element 3. In actual use, the pre-filter element 1 and the post-filter element 3 can also be thermally regenerated or cooled simultaneously by controlling the first control valve 201, which will not be repeated in this embodiment.

On the other hand, the present embodiment also provides a control method for a water purification system, comprising the following steps: when the water purification system executes a thermal regeneration mode, the control valve group controls hot water to flow through the heating water outlet 42, the first regeneration pipeline 200, the post-filter element water outlet 32, the post-filter element 3, the post-filter element water inlet 31 and the drainage pipeline 500 in sequence, to achieve reverse hot flushing of the post-filter element 3, and/or the control valve group controls hot water to flow through the heating water outlet 42, the second regeneration pipeline 300, the pre-filter element water outlet 12, the pre-filter element 1, the pre-filter element water inlet 11 and the drainage pipeline 500 in sequence, to achieve reverse hot flushing of the pre-filter element 1.

Since the control method of this embodiment is used to control the water purification system of this embodiment, the control method has the same technical effect as the water purification system of this embodiment, and will not be described in detail here.

Optionally, when the water purification volume of the water purification system reaches a preset volume, or the lifespans of the pre-filter element 1 and the post-filter element 3 reach preset lifespans, the water purification system executes a thermal regeneration mode. The water purification system may execute a thermal regeneration mode according to the water purification volume of the system or the lifespans of the pre-filter element 1 and the post-filter element 3, so as to realize timely active regeneration of the pre-filter element 1 and the post-filter element 3 and ensure their service life.

In this embodiment, when the life of the pre-filter element 1 reaches the first preset life and the life of the post-filter element 3 does not reach the second preset life, the water purification system executes the thermal regeneration mode to only perform active regeneration on the pre-filter element 1. When the life of the pre-filter element 1 does not reach the first preset life and the life of the post-filter element 3 reaches the second preset life, the water purification system executes the thermal regeneration mode to only perform active regeneration on the post-filter element 3. The water purification system can also execute the thermal regeneration mode according to the respective service life conditions (i.e., degree of contamination) of the pre-filter element 1 and the post-filter element 3, so as to realize timely independent active regeneration of the pre-filter element 1 or the post-filter element 3, and ensure the service life of both.

It can be understood here that when the life of the pre-filter element 1 reaches the first preset life, it means that the pre-filter element 1 is heavily polluted and has basically lost its active adsorption capacity for tap water. When the life of the post-filter element 3 reaches the second preset life, it means that the post-filter element 3 is heavily polluted and has basically lost its active adsorption capacity for tap water. Therefore, the water purification system needs to execute the thermal regeneration mode to perform active regeneration on the pre-filter element 1 or the post-filter element 3.

Of course, the preset life, the first preset life, and the second preset life can all be set as needed, and are generally determined when the pre-filter element 1 and the post-filter element 3 are manufactured.

The water purification system performs the thermal regeneration mode specifically including: the water purification system performs the thermal regeneration mode and enters the reverse hot flushing state, or the water purification system performs the thermal regeneration mode and enters the soaking state, or the water purification system performs the thermal regeneration mode and the reverse hot flushing state and the cooling mode alternately operate. The water purification system performs the thermal regeneration mode and includes a variety of regeneration modes, which can be selected according to needs, with strong selectivity and applicability.

The temperature of the hot water in the control method of this embodiment is greater than the ambient temperature and less than the boiling point of water. By limiting the temperature of the hot water within an appropriate range, the pre-filter element 1 and/or the post-filter element 3 at room temperature can be regenerated, and excessive water consumption during cooling of the pre-filter element 1 and/or the post-filter element 3 due to excessively high hot water temperature can be avoided, resulting in a waste of resources.

Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims (20)

1. A water purification system, comprising:

the water production device comprises a water production pipeline (100) and a front filter element (1) and a rear filter element (3) which are sequentially connected in series to the water production pipeline (100), wherein the front filter element (1) and the rear filter element (3) comprise carbon water purification units, the front filter element (1) is provided with a front filter element water inlet (11) and a front filter element water outlet (12), and the rear filter element (3) is provided with a rear filter element water inlet (31) and a rear filter element water outlet (32);

The heating device (4) is provided with a heating water inlet (41) and a heating water outlet (42), and the heating water outlet (42) is connected with the water taking end;

A backflushing pipeline comprising a first regeneration pipeline (200) connected in parallel between the heating water outlet (42) and the post-filter element water outlet (32), a second regeneration pipeline (300) connected in parallel between the heating water outlet (42) and the pre-filter element water outlet (12), and a drainage pipeline (500) respectively communicated with the post-filter element water inlet (31) and the pre-filter element water inlet (11);

The control valve group is arranged on the water making pipeline (100) and the back flushing pipeline, and is suitable for controlling the water purifying system to execute a thermal regeneration mode, and controlling hot water to sequentially flow through the heating water outlet (42), the first regeneration pipeline (200), the rear filter element water outlet (32), the rear filter element (3), the rear filter element water inlet (31) and the drainage pipeline (500), and/or sequentially flow through the heating water outlet (42), the second regeneration pipeline (300), the front filter element water outlet (12), the front filter element (1), the front filter element water inlet (11) and the drainage pipeline (500).

2. The water purification system according to claim 1, wherein the control valve group comprises a first pipe switching structure having a first state of communicating the pre-cartridge water inlet (11) with a tap water inlet, a second state of communicating the pre-cartridge water inlet (11) with the drain pipe (500), the first pipe switching structure being in the first state when the water purification system performs the water making mode, the first pipe switching structure being in the second state when the water purification system performs the thermal regeneration mode.

3. The water purification system according to claim 1, wherein the control valve block further comprises a fourth pipeline switching structure having a first state in which the post-cartridge water outlet (32) is in communication with the heating water inlet (41), a second state in which the post-cartridge water outlet (32) is in communication with the first regeneration pipeline (200), the fourth pipeline switching structure being in the first state when the water purification system performs the water production mode, and the fourth pipeline switching structure being in the second state when the water purification system performs the thermal regeneration mode.

4. The water purification system according to claim 1, further comprising a fine filter cartridge (2), the fine filter cartridge (2) having a fine filter cartridge water inlet (21), a pure water port (23) and a waste water port (22);

The control valve block further includes: a second pipe switching structure having a first state in which the pre-cartridge water outlet (12) is communicated with the fine-cartridge water inlet (21), and a second state in which the pre-cartridge water outlet (12) is communicated with the second regeneration pipe (300), the second pipe switching structure being in the first state when the water purification system performs a water making mode, and in the second state when the water purification system performs the thermal regeneration mode; and/or

The third pipeline switching structure is provided with a first state for communicating the pure water port (23) with the water inlet (31) of the rear filter element and a second state for communicating the water inlet (31) of the rear filter element with the drainage pipeline (500), and is in the first state when the water purifying system executes a water making mode, and is in the second state when the water purifying system executes a thermal regeneration mode.

5. The water purification system according to claim 2, wherein the first pipeline switching structure comprises a first reversing valve (101), wherein the water inlet of the first reversing valve (101) is communicated with the front filter core water inlet (11), the first water outlet of the first reversing valve (101) is connected with the tap water inlet, the second water outlet of the first reversing valve (101) is connected with the water draining pipeline (500), when the first pipeline switching structure is in the first state, the water inlet of the first reversing valve (101) is communicated with the first water outlet of the first reversing valve (101), and when the first pipeline switching structure is in the second state, the water inlet of the first reversing valve (101) is communicated with the second water outlet of the first reversing valve (101).

6. The water purification system according to claim 4, wherein the second pipeline switching structure comprises a second reversing valve (102), a water inlet of the second reversing valve (102) is communicated with the pre-filter cartridge water outlet (12), a first water outlet of the second reversing valve (102) is connected with the fine filter cartridge water inlet (21), a second water outlet of the second reversing valve (102) is connected with the second regeneration pipeline (300), when the second pipeline switching structure is in the first state, a water inlet of the second reversing valve (102) is communicated with a first water outlet of the second reversing valve (102), and when the second pipeline switching structure is in the second state, a water inlet of the second reversing valve (102) is communicated with a second water outlet of the second reversing valve (102).

7. The water purification system according to claim 4, wherein the third pipeline switching structure comprises a third reversing valve (103), a water inlet of the third reversing valve (103) is communicated with the rear filter core water inlet (31), a first water outlet of the third reversing valve (103) is connected with the pure water inlet (23), a second water outlet of the third reversing valve (103) is connected with the water draining pipeline (500), when the third pipeline switching structure is in the first state, a water inlet of the third reversing valve (103) is communicated with a first water outlet of the third reversing valve (103), and when the third pipeline switching structure is in the second state, a water inlet of the third reversing valve (103) is communicated with a second water outlet of the third reversing valve (103).

8. A water purification system according to claim 3, wherein the post-cartridge water outlet (32) is connected to the heating water inlet (41) by a post-water outlet line (400), the fourth line switching structure comprises a first control valve (201) arranged on the first regeneration line (200) and a second control valve arranged on the post-water outlet line (400), the first control valve (201) is closed and the second control valve is opened when the fourth line switching structure is in the first state, and the first control valve (201) is opened and the second control valve is closed when the fourth line switching structure is in the second state.

9. The water purification system according to claim 8, wherein the second regeneration line (300) is connected to the first regeneration line (200) and a connection of the second regeneration line (300) to the first regeneration line (200) is located upstream of the first control valve (201) in the hot water flow direction.

10. The water purification system according to claim 9, further comprising a water purification tank (5), wherein the water purification tank (5) is connected to both the post-water outlet pipe (400) and the second regeneration pipe (300), and when the water purification system performs the cooling mode, normal-temperature pure water in the water purification tank (5) flows through the post-water outlet pipe (400), the post-cartridge water outlet (32), the post-cartridge (3), the post-cartridge water inlet (31) and the water drain pipe (500) in order, and/or flows through the second regeneration pipe (300), the pre-cartridge water outlet (12), the pre-cartridge (1), the pre-cartridge water inlet (11) and the water drain pipe (500) in order.

11. The water purification system according to claim 10, wherein the pure water tank (5) has a pure water tank water inlet (51), a pure water tank water outlet (52), the pure water tank water inlet (51) being connected with the rear water outlet line (400), the pure water tank water outlet (52) being in communication with the heating water inlet (41);

The water purification system further comprises a cooling pipeline (600), one end of the cooling pipeline (600) is connected with the water inlet (51) of the pure water tank, the other end of the cooling pipeline (600) is connected with the first regeneration pipeline (200), the joint of the cooling pipeline (600) and the first regeneration pipeline (200) is located at the upstream of the joint of the second regeneration pipeline (300) and the first regeneration pipeline (200) along the flowing direction of hot water, and a first one-way valve (601) which only allows pure water of the pure water tank (5) to flow from the cooling pipeline (600) to the first regeneration pipeline (200) is arranged on the cooling pipeline (600).

12. The water purification system according to claim 11, characterized in that said first regeneration line (200) is provided with a second one-way valve (202) allowing only the flow of hot water from said heating device (4) to said pre-filter cartridge (1) and said post-filter cartridge (3), said second one-way valve (202) being located upstream of the junction of said cooling line (600) with said first regeneration line (200).

13. The water purification system according to claim 11, wherein an end of the cooling line (600) remote from the first regeneration line (200) is connected to the post-water outlet line (400), the second control valve is a fourth reversing valve (401), the fourth reversing valve (401) communicates the pure water tank water inlet (51) with the post-water outlet line (400) when the water purification system performs the water generation mode, and the fourth reversing valve (401) communicates the pure water tank water inlet (51) with the post-water outlet line (400) or communicates the pure water tank water inlet (51) with the cooling line (600) when the water purification system performs the cooling mode.

14. The water purification system of claim 10, wherein the water purification system has an operating state in which the thermal regeneration mode and the cooling mode are alternately performed.

15. The water purification system according to any one of claims 1 to 14, wherein the water discharge line (500) comprises:

the first drainage branch pipeline (501) is connected with the water inlet (11) of the front filter element;

the second drainage branch pipeline (502) is connected with the water inlet (31) of the rear filter element;

The drainage main pipeline (503) is communicated with the drainage outlet, the drainage main pipeline (503) is connected with the first drainage branch pipeline (501) and the second drainage branch pipeline (502), and the drainage main pipeline (503) is provided with a drainage valve (5031).

16. The water purification system according to claim 15, characterized in that the thermal regeneration mode further comprises a soak state in which the drain valve (5031) is closed and the pre-filter element (1) and/or the post-filter element (3) is soaked with hot water in the heating device (4).

17. The water purification system according to claim 4, 6 or 7, wherein the waste water port (22) is connected to a waste water discharge line (700), and a waste water valve (701) is provided on the waste water discharge line (700).

18. The water purification system according to any one of claims 1 to 14, further comprising a liquid level detector provided to the pre-filter (1) and/or the post-filter (3), the liquid level detector being configured to control the opening and closing of the heating device (4) by obtaining the liquid level of the pre-filter (1) and/or the liquid level of the post-filter (3).

19. The water purification system according to any one of claims 1 to 14, further comprising a temperature detector and a controller, the controller being in communication with both the temperature detector and the heating device (4), the temperature detector being adapted to obtain a temperature value of the hot water, such that the controller adjusts the heating power of the heating device (4) in accordance with the temperature value.

20. The water purification system according to any one of claims 1 to 14, further comprising a coarse filter cartridge (6), said coarse filter cartridge (6) being connected in series to the upstream of said pre-cartridge (1) by means of said water production line (100), said water production line (100) upstream of said coarse filter cartridge (6) being provided with a booster pump (104).