Water purification system

Abstract

The utility model relates to the technical field of water purification, and discloses a water purification system, which comprises a water production device, a heat regeneration device and a control valve group, the water production device comprises a front filter element, a water storage unit and a heating unit which are serially connected to a water production pipeline, and the front filter element is provided with a first water outlet and a first water inlet communicated with the water storage unit; the heating unit is provided with a heating water inlet and a heating water outlet connected with the boiling water taking port, and the heat regeneration device comprises a heat exchange unit, a regeneration pipeline connected with the first water outlet and a drainage pipeline connected with the first water inlet. The two ends of the first heat exchange channel are connected with the water storage unit and the heating water inlet correspondingly, the two ends of the second heat exchange channel are connected with the heating water outlet and the regeneration pipeline correspondingly, and the control valve set is arranged on the water making pipeline and the regeneration pipeline. The heating power of the heating unit does not need to be frequently adjusted, the requirement that a user can still directly take boiling water before and after the water purification system executes the heat regeneration mode is met, waiting is not needed, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, and particularly relates to a water purification system. Background Art

[0002] During the transportation process of tap water in the pipe network, there will inevitably be pollution such as rust, sediment, organic matter and microorganisms. A water purifier with a purification function can play a good role in removing impurities from tap water. The water purification system of the water purifier usually includes a pre-filter, a precision filter and a post-treatment filter. Among them, the pre-filter is used to remove organic matter, colloid, heavy metals and sediment particles, etc. The precision filter has extremely high precision, such as a reverse osmosis membrane filter (RO filter), which is the core treatment filter of the water purification system. The post-treatment filter is used to remove trace elements, adjust the pH and drinking taste, etc.

[0003] The activated carbon component in the pre-filter can effectively remove oxidizing substances such as residual chlorine. Therefore, the activated carbon component is an indispensable and important part of the pre-filter. However, the activated carbon component of the pre-filter has a shorter service life than other filters, resulting in the need to frequently replace the pre-filter, high cost and also limiting the nominal value of the rated net water volume of the whole machine. Summary of the Utility Model

[0004] In view of this, the utility model provides a water purification system to solve the problems of frequent replacement and high cost of the pre-filter in the prior art.

[0005] The utility model provides a water purification system, including a water production device, a thermal regeneration device and a control valve group. The water production device includes a pre-filter, a water storage unit and a heating unit connected in series to a water production pipeline in sequence. The pre-filter includes an activated carbon component and has a first water inlet and a first water outlet. The water storage unit is communicated with the first water outlet. The heating unit has a heating water inlet and a heating water outlet. The heating water outlet is connected to a boiling water intake. The thermal regeneration device includes a heat exchange unit, a regeneration pipeline and a drainage pipeline. The heat exchange unit has a first heat exchange channel and a second heat exchange channel. The two ends of the first heat exchange channel are respectively connected to the water storage unit and the heating water inlet. The two ends of the second heat exchange channel are respectively connected to the heating water outlet and the regeneration pipeline. The regeneration pipeline is connected to the first water outlet. The drainage pipeline is connected to the first water inlet. The control valve group is arranged on the water production pipeline and the regeneration pipeline. The control valve group can control the water purification system to execute a thermal regeneration mode, and control the boiling water of the heating unit to flow into the second heat exchange channel and exchange heat with the normal temperature water from the water storage unit in the first heat exchange channel to form hot water with a preset value. The hot water flows through the regeneration pipeline, the first water outlet, the pre-filter, the first water inlet and the drainage pipeline to realize reverse thermal flushing regeneration of the pre-filter.

[0006] Beneficial effect: raw water (such as tap water) flows into the pre-filter through the water production pipeline for filtration, thereby achieving tap water purification, and the water purification system can execute the thermal regeneration mode through the provided thermal regeneration device and the control valve group according to the usage situation. When the control valve group controls the water purification system to execute the thermal regeneration mode, the boiling water of the heating unit can be controlled to flow into the second heat exchange channel and exchange heat with the normal temperature water from the water storage unit in the first heat exchange channel to form hot water of a preset value. The hot water flows through the regeneration pipeline and the first water outlet into the pre-filter to realize reverse hot flushing regeneration of the pre-filter. The hot water after flushing is discharged through the first water inlet and the drainage pipeline. The hot water of this application is not only The pre-filter element has a flushing effect and can also break the balance between the activated carbon and the pollutant adsorbent, so that the pollutants are analyzed and desorbed, so that the activated carbon component can restore some of its adsorption capacity and realize the regeneration of the pre-filter element, thereby extending the service life of the pre-filter element, reducing its replacement frequency, and reducing costs. At the same time, the boiling water of the heating unit is cooled by the set heat exchange unit, which does not affect the hot water use of the water purification system. That is, the water purification system does not need to adjust the heating power of the heating unit before and after executing the thermal regeneration mode, so that the heating unit maintains the power of heating boiling water. Users can directly use boiling water before and after the thermal regeneration mode without waiting, which improves the user experience.

[0007] In some embodiments, the regeneration pipeline is connected to the water storage unit. According to the termination of the thermal regeneration mode, the control valve group controls the water purification system to execute the cooling mode, and controls the normal temperature water in the water storage unit to flow through the regeneration pipeline, the first water outlet, the pre-filter element, the first water inlet and the drainage pipeline to achieve flushing and cooling of the pre-filter element.

[0008] Beneficial effect: When the hot regeneration mode ends, the control valve group controls the water purification system to execute the cooling mode, and controls the normal temperature water in the water storage unit to flow through the regeneration pipeline and the first water outlet into the pre-filter element to achieve flushing and cooling of the pre-filter element. The cooled water is discharged through the first water inlet and the drain pipe. Therefore, by controlling the water purification system to execute the cooling mode through the control valve group, the hot water remaining in the hot regeneration mode of the pre-filter element can be quickly replaced, thereby achieving rapid cooling of the pre-filter element, reducing the waiting time for users to get water, and preventing hot water from flowing into the rear-end fine filter element to cause damage to it and shorten its life.

[0009] In some embodiments, the control valve group includes a pipeline switching structure, which has a first state in which the water storage unit is connected to the first heat exchange channel and a second state in which the water storage unit is connected to the regeneration pipeline. According to the execution of the thermal regeneration mode by the water purification system, the pipeline switching structure is in the first state, and according to the execution of the cooling mode by the water purification system, the pipeline switching structure is in the second state.

[0010] Beneficial effects: With the above arrangement, when the water purification system executes the thermal regeneration mode and the pipeline switching structure is in the first state, the normal-temperature water in the water storage unit flows into the first heat exchange channel through the pipeline switching structure and exchanges heat with the boiling water from the heating unit in the second heat exchange channel. The heated hot water then flows into the pre-filter for thermal regeneration. When the water purification system executes the cooling mode, the pipeline switching structure is in the second state, and the normal-temperature water in the water storage unit flows into the regeneration pipeline through the pipeline switching structure and then into the pre-filter through the regeneration pipeline for flushing and cooling. Therefore, the pipeline switching structure serves to switch the connection state of the water storage unit to achieve the switching between the thermal regeneration mode and the cooling mode of the water purification system.

[0011] In some embodiments, the pipeline switching structure includes a first solenoid valve and a second solenoid valve. The inlet of the first solenoid valve is connected to the water storage unit, the outlet of the first solenoid valve is connected to the first heat exchange channel, the inlet of the second solenoid valve is connected to the water storage unit, and the outlet of the second solenoid valve is connected to the regeneration pipeline. When the pipeline switching structure is in the first state, the first solenoid valve is opened. When the pipeline switching structure is in the second state, the second solenoid valve is opened.

[0012] Beneficial effects: When the water purification system executes the thermal regeneration mode and the pipeline switching structure is in the first state, the first solenoid valve is opened and the second solenoid valve is closed. The normal-temperature water in the water storage unit flows into the first heat exchange channel through the first solenoid valve and exchanges heat with the boiling water from the heating unit in the second heat exchange channel. The heated hot water then flows into the pre-filter for thermal regeneration. When the water purification system executes the cooling mode, the pipeline switching structure is in the second state, the second solenoid valve is opened and the first solenoid valve is closed. The normal-temperature water in the water storage unit flows into the regeneration pipeline through the second solenoid valve and then into the pre-filter through the regeneration pipeline for flushing and cooling.

[0013] In some embodiments, the pipeline switching structure is a two-way valve. The water inlet of the two-way valve is connected to the water storage unit, the first outlet of the two-way valve is connected to the first heat exchange channel, and the second outlet of the two-way valve is connected to the regeneration pipeline. When the pipeline switching structure is in the first state, the water inlet of the two-way valve is in communication with the first outlet. When the pipeline switching structure is in the second state, the water inlet of the two-way valve is in communication with the second outlet.

[0014] Beneficial effects: When the water purification system executes the thermal regeneration mode and the pipeline switching structure is in the first state, the water inlet and the first outlet of the two-way valve are connected. The normal-temperature water in the water storage unit flows into the two-way valve through the water inlet, flows out through the first outlet, and then flows into the first heat exchange channel and exchanges heat with the boiling water from the heating unit in the second heat exchange channel. The heated hot water flows into the pre-filter for thermal regeneration. When the water purification system executes the cooling and temperature reduction mode, the pipeline switching structure is in the second state, the water inlet and the second outlet of the two-way valve are connected. The normal-temperature water in the water storage unit flows into the two-way valve through the water inlet, flows out through the second outlet, flows through the regeneration pipeline, and then flows into the pre-filter for flushing and temperature reduction.

[0015] In some embodiments, the control valve group further includes a drain valve disposed in the drain pipeline and / or a regeneration valve disposed in the regeneration pipeline.

[0016] Beneficial effects: The drain valve opens when drainage is required and closes when the water purification system purifies water to ensure the normal operation of the water purification system. The regeneration valve is used to control the on / off of the regeneration pipeline. The regeneration valve opens when the water purification system executes the thermal regeneration mode and closes when the water purification system is purifying water.

[0017] In some embodiments, the water purification system further includes a temperature regulating device, and the temperature regulating device is connected to the regeneration pipeline. The temperature regulating device is used to adjust the temperature of the hot water in the regeneration pipeline to reach the preset value.

[0018] Beneficial effects: Since the temperature of the normal-temperature water in the water storage unit is constant (consistent with the environment) and the temperature of the boiling water in the heating unit is constant, the hot water after heat exchange by the heat exchange unit generally has a specific temperature. Factors such as environmental temperature changes are likely to affect the hot water after heat exchange by the heat exchange unit not reaching the preset value. Based on this, the set temperature regulating device can adjust the temperature of the hot water in the regeneration pipeline to reach the preset value to ensure the thermal regeneration effect.

[0019] In some embodiments, the temperature regulating device includes a temperature regulating pipeline and a temperature regulating valve. The two ends of the temperature regulating pipeline are respectively connected to the heating unit and the regeneration pipeline. The temperature regulating valve is disposed on the temperature regulating pipeline, and the temperature regulating valve is used to open when the temperature of the hot water in the regeneration pipeline is lower than the preset value.

[0020] Beneficial effects: When the hot water after heat exchange by the heat exchange unit flows into the regeneration pipeline and the temperature of the hot water after heat exchange is lower than the preset value, the temperature regulating valve is opened so that the boiling water from the heating unit flows into the regeneration pipeline through the temperature regulating pipeline and mixes with the hot water therein to increase the temperature of the hot water to reach the preset value.

[0021] In some embodiments, the pre-filter element includes a first filtration unit, the first filtration unit includes the activated carbon component, the first water inlet is connected to the inlet of the first filtration unit, and the first water outlet is connected to the outlet of the first filtration unit.

[0022] Advantageous effects: With the above arrangement, the raw water (tap water) entering from the water inlet end flows through the first water inlet and then into the first filtration unit. After being filtered by the first filtration unit, it flows out through the first water outlet, realizing the primary filtration of the raw water and filtering out large particle impurities in the raw water.

[0023] In some embodiments, the pre-filter element has a second water inlet and a second water outlet. The pre-filter element further includes a second filtration unit independently arranged from the first filtration unit. The second filtration unit includes the activated carbon component. The second water inlet is connected to the inlet of the second filtration unit, the second water outlet is connected to the outlet of the second filtration unit, and the water storage unit is connected to the second water outlet.

[0024] Advantageous effects: The pure water flows into the second filtration unit through the second water inlet. The second filtration unit can filter the pure water again to remove trace elements, adjust the pH value and drinking taste. The filtered purified water flows to the water intake end for the user to take and / or flows to the water storage unit for storage through the second water outlet.

[0025] In some embodiments, the water purification device further includes a fine filter element. The fine filter element has a fine filter element water inlet and a pure water outlet. The fine filter element water inlet is connected to the first water outlet, and the pure water outlet is connected to the second water inlet.

[0026] Advantageous effects: The fine filter element can perform fine filtration on the raw water filtered by the first filtration unit. The filtered pure water flows into the second filtration unit through the pure water outlet and the second water inlet for re-filtration to ensure water quality.

[0027] In some embodiments, the water purification device further includes a post-filter element, and the post-filter element is arranged between the water storage unit and the heat exchange unit.

[0028] Advantageous effects: It can filter the purified water flowing out of the water storage unit again, avoid water quality changes caused by too long water storage time in the water storage unit, and ensure water quality. Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It shows a schematic diagram of the overall connection structure of a water purification system according to an embodiment of the present utility model;

[0031] Figure 2 It shows a schematic diagram of the overall connection structure of a water purification system according to another embodiment of the present utility model;

[0032] Figure 3 It shows a schematic diagram of the overall connection structure of a water purification system according to still another embodiment of the present utility model;

[0033] Figure 4 It shows a schematic diagram of the overall connection structure of a water purification system according to yet another embodiment of the present utility model;

[0034] Figure 5 It shows a schematic diagram of the structure of a pre-filter according to an embodiment of the present utility model;

[0035] Figure 6 It shows a schematic diagram of the structure of a fine filter according to an embodiment of the present utility model;

[0036] Figure 7 It shows a schematic diagram of the water flow when the water purification system according to an embodiment of the present utility model executes the thermal regeneration mode;

[0037] Figure 8 It shows a schematic diagram of the water flow when the water purification system according to an embodiment of the present utility model executes the cooling mode;

[0038] Figure 9 It shows a schematic diagram of the water flow when the water purification system according to another embodiment of the present utility model executes the thermal regeneration mode;

[0039] Figure 10 It shows a schematic diagram of the water flow when the water purification system according to another embodiment of the present utility model executes the cooling mode.

[0040] Explanation of reference numerals:

[0041] 1. Prefilter; 11. First filtration unit; 111. First water inlet; 112. First water outlet; 12. Second filtration unit; 121. Second water inlet; 122. Second water outlet; 2. Fine filter element; 21. Fine filter element water inlet; 22. Pure water outlet; 23. Waste water outlet; 3. Water storage unit; 4. Post-filter; 5. Heat exchange unit; 6. Heating unit; 61. Heating water inlet; 62. Heating water outlet;

[0042] 100. Water supply pipeline; 101. First solenoid valve; 102. Second solenoid valve; 103. Two-way valve; 1031. Water inlet; 1032. First outlet; 1033. Second outlet; 104. First water inlet valve; 105. Second water inlet valve; 106. Pressure stabilizing pump; 107. Boiling water intake; 108. Warm water intake; 200. Regeneration pipeline; 201. Regeneration valve; 202. Check valve; 300. Drainage pipeline; 301. Drainage valve; 400. Temperature adjustment pipeline; 401. Temperature adjustment valve; 500. Waste water pipeline; 501. Waste water valve. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0044] The following combines with Figures 1 to 10 to describe the embodiments of the present utility model.

[0045] According to an embodiment of the present utility model, a water purification system is provided, which includes a water production device, a thermal regeneration device, and a control valve group. Among them, the water production device includes a pre-filter 1, a water storage unit 3, and a heating unit 6 that are sequentially connected in series to a water production pipeline 100. The pre-filter 1 includes an activated carbon component and has a first water inlet 111 and a first water outlet 112. The water storage unit 3 is communicated with the first water outlet 112. The heating unit 6 has a heating water inlet 61 and a heating water outlet 62. The heating water outlet 62 is connected to a hot water taking end. The thermal regeneration device includes a heat exchange unit 5, a regeneration pipeline 200, and a drainage pipeline 300. The heat exchange unit 5 has a first heat exchange channel and a second heat exchange channel. Two ends of the first heat exchange channel are respectively connected to the water storage unit 3 and the heating water inlet 61. Two ends of the second heat exchange channel are respectively connected to the heating water outlet 62 and the regeneration pipeline 200. The regeneration pipeline 200 is connected to the first water outlet 112. The drainage pipeline 300 is connected to the first water inlet 111. The control valve group is arranged on the water production pipeline 100 and the regeneration pipeline 200. The control valve group can control the water purification system to execute a thermal regeneration mode, and control the boiling water of the heating unit 6 to flow into the second heat exchange channel and exchange heat with the normal temperature water from the water storage unit 3 in the first heat exchange channel to form hot water with a preset value. The hot water flows through the regeneration pipeline 200, the first water outlet 112, the pre-filter 1, the first water inlet 111, and the drainage pipeline 300 to realize reverse thermal flushing regeneration of the pre-filter 1.

[0046] In the water purification system of this embodiment, raw water (such as tap water) flows into the pre-filter 1 through the water production pipeline 100 for filtration to realize tap water purification. And the water purification system can execute a thermal regeneration mode according to the usage situation through the set thermal regeneration device and control valve group. When the control valve group controls the water purification system to execute the thermal regeneration mode, it can control the boiling water of the heating unit 6 to flow into the second heat exchange channel and exchange heat with the normal temperature water from the water storage unit 3 in the first heat exchange channel to form hot water with a preset value. The hot water flows through the regeneration pipeline 200 and the first water outlet 112 into the pre-filter 1 to realize reverse thermal flushing regeneration of the pre-filter 1. The flushed hot water is discharged through the first water inlet 111 and the drainage pipeline 300. The hot water in this application not only has the effect of flushing the pre-filter 1, but also can break the balance between the activated carbon and the pollution adsorbate, so that the pollutants are desorbed, thereby enabling the activated carbon component to recover part of its adsorption capacity, realizing the regeneration of the pre-filter 1, further prolonging the service life of the pre-filter 1, reducing its replacement frequency, and reducing costs. At the same time, the heat exchange unit 5 is set to cool down the boiling water of the heating unit 6, and thus does not affect the hot water taking of the water purification system, that is, before and after the water purification system executes the thermal regeneration mode, it is not necessary to adjust the heating power of the heating unit 6 so that the heating unit 6 remains at the power of heating boiling water unchanged. Users can directly take boiling water from the boiling water taking port 107 before and after the thermal regeneration mode without waiting, improving the user experience.

[0047] Such asFigures 1 to 4 As shown, the water supply pipeline 100 is connected to the raw water inlet end. The raw water is generally tap water to purify the tap water. A first water inlet valve 104 is provided in the water supply pipeline 100 upstream of the pre-filter element 1 to facilitate the control of the flow of tap water.

[0048] As Figure 1 、 Figure 3 and Figure 5 As shown, in some embodiments, the pre-filter element 1 includes a first filtering unit 11. The first filtering unit 11 includes an activated carbon component. The first water inlet 111 is connected to the inlet of the first filtering unit 11, and the first water outlet 112 is connected to the outlet of the first filtering unit 11.

[0049] With the above settings, the raw water (tap water) entering from the water inlet end flows through the first water inlet 111 and then into the first filtering unit 11. After being filtered by the first filtering unit 11, it flows out through the first water outlet 112, realizing the primary filtration of the raw water and filtering out large particulate impurities in the raw water.

[0050] For example, the first filtering unit 11 can be a filter element synthesized by PP cotton, activated carbon, and ultrafiltration. It can adsorb impurities such as sediment in the raw water and can also remove residual chlorine in the raw water, realizing the rough filtration of the raw water.

[0051] In some embodiments, the pre-filter element 1 has a second water inlet 121 and a second water outlet 122. The pre-filter element 1 further includes a second filtering unit 12 independently provided from the first filtering unit 11. The second filtering unit 12 includes an activated carbon component. The second water inlet 121 is connected to the inlet of the second filtering unit 12, and the second water outlet 122 is connected to the outlet of the second filtering unit 12. The water storage unit 3 is connected to the second water outlet 122.

[0052] Pure water flows into the second filtering unit 12 through the second water inlet 121. The second filtering unit 12 can filter the pure water again to remove trace elements, adjust the pH value, and improve the drinking taste. The filtered purified water flows to the water intake end for the user to use and / or flows to the water storage unit 3 for storage.

[0053] For example, the second filtering unit 12 can be a filter element containing an activated carbon component.

[0054] Specifically, the pre-filter element 1 has a filter housing. The first water inlet 111, the first water outlet 112, the second water inlet 121, and the second water outlet 122 are all provided on the filter housing. The first filtering unit 11 and the second filtering unit 12 are independently arranged in the filter housing. By integrating the first filtering unit 11 and the second filtering unit 12 in the same filter housing, there is no need to additionally set the structure of the post-filter element 4, thus achieving the effect of simplifying the device structure, making the overall structure of the machine more compact and reducing the volume.

[0055] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 shown, in some embodiments, the water production device further includes a fine filter element 2, the fine filter element 2 has a fine filter element water inlet 21 and a pure water outlet 22, the fine filter element water inlet 21 is connected to the first water outlet 112, and the pure water outlet 22 is connected to the second water inlet 121.

[0056] The fine filter element 2 can perform fine filtration on the raw water filtered by the first filtration unit 11, and the filtered pure water flows into the second filtration unit 12 through the pure water outlet 22 and the second water inlet 121 for re-filtration to ensure water quality.

[0057] The fine filter element 2 has a higher filtration accuracy than the pre-filter element 1. The fine filter element 2 is arranged downstream of the first filtration unit 11 and can further purify the raw water filtered by the first filtration unit 11 with high precision. It is the core treatment filter element of the water production device.

[0058] Specific forms, for example, the fine filter element 2 can be a reverse osmosis membrane filter element (RO filter element), a nanofiltration membrane filter element, etc., which are specifically selected according to the filtration requirements and are not specifically limited in this embodiment.

[0059] Since the particle size of the fine filter element 2 is very small and the resistance of the raw water passing through is large, a pressure stabilizing pump 106 is provided on the water production pipeline 100 connecting the first filtration unit 11 and the fine filter element 2 to pressurize the raw water so that it passes through the fine filter element 2 and improve the filtration efficiency.

[0060] In some embodiments, a second water inlet valve 105 is further provided on the water production pipeline 100 connecting the first filtration unit 11 and the fine filter element 2, and the second water inlet valve 105 is located upstream of the pressure stabilizing pump 106.

[0061] The second water inlet valve 105 can control and adjust the raw water flowing to the fine filter element 2, and can also cut off the water production pipeline 100 when the water purification system stops working to prevent the raw water from continuing to flow into the fine filter element 2 and causing damage to the filter element.

[0062] As shown in the figure, in some embodiments, the fine filter element 2 further has a waste water outlet 23, and the water production device further includes a waste water pipeline 500, and the waste water pipeline 500 is communicated with the waste water outlet 23.

[0063] Corresponding waste water will be generated during the filtration of the fine filter element 2, and the waste water flows into the waste water pipeline 500 through the waste water outlet 23 and is discharged to the outside through the waste water pipeline 500.

[0064] A waste water valve 501 is provided on the waste water pipeline 500 to control the connection or disconnection of the waste water pipeline 500.

[0065] Of course, in some other embodiments, such as Figure 2 or Figure 4 shown, the pre-filter 1 may also be provided with only the first filtering unit 11 and without the second filtering unit 12. A post-filter 4 is provided on the water supply pipeline 100 downstream of the water storage unit 3 or the fine filter element 2, and the post-filter 4 is used to filter the water flowing out of the water storage unit 3 and the fine filter element 2 again, which can also ensure the water quality.

[0066] The water storage unit 3 is used to store the filtered purified water, which is convenient for users to take and can avoid the long-term operation of the water treatment device.

[0067] The water storage unit 3 is a device with its own water outlet driving force. For example, it can be a pressure barrel, or a water storage device with a self-priming pump or a water pump attached, etc.

[0068] The heating unit 6 can heat the purified water to boiling. For example, the heating unit 6 can be a hot water tank or a water storage device with a heating element, etc.

[0069] The heat exchange unit 5 can specifically be a heat exchanger. During heat exchange, the boiling water of the heating unit 6 flows into the second heat exchange channel, and the normal temperature water of the water storage unit 3 flows into the first heat exchange channel. The heat of the boiling water is radiated to the normal temperature water in the first heat exchange channel, so as to realize the heat exchange of the boiling water into hot water with a preset value.

[0070] It should be noted here that the preset value can be set according to the hot water temperature required by the thermal regeneration mode. The preset value can be a specific temperature value or a temperature range value. For example, the preset value can be from 36°C to 40°C, but it is not limited to this.

[0071] The regeneration pipeline 200 is used for the cooled hot water to flow to the pre-filter 1 to achieve thermal regeneration. The regeneration pipeline 200 can specifically be hermetically connected to the first water outlet 112, or the regeneration pipeline 200 is connected to the water supply pipeline 100 between the first filtering unit 11 and the fine filter element 2. It should be noted that when the regeneration pipeline 200 is connected to the water supply pipeline 100 between the first filtering unit 11 and the fine filter element 2, the connection point is upstream of the second inlet valve 105 to avoid the backflow of the hot water in the regeneration pipeline 200 to the fine filter element 2 and cause damage to it.

[0072] In some embodiments, a regeneration valve 201 is provided on the regeneration pipeline 200. The regeneration valve 201 is used to control the on-off of the regeneration pipeline 200. The regeneration valve 201 is opened when the water purification system executes the thermal regeneration mode and closed when the water purification system is purifying water.

[0073] In some embodiments, a check valve 202 is further provided on the regeneration pipeline 200. The check valve 202 is arranged downstream of the regeneration valve 201. The check valve 202 can allow the hot water in the regeneration pipeline 200 to flow forward to the pre-filter 1 and block the raw water flowing out of the pre-filter 1 to prevent it from flowing back into the regeneration pipeline 200.

[0074] In some embodiments, the water production device further includes a warm water intake 108. The warm water intake 108 is communicated with the outlet of the second heat exchange channel. When warm water needs to be taken, the warm water intake 108 is opened, and the boiling water in the heating unit 6 flows into the second heat exchange channel and exchanges heat with the normal temperature water in the first heat exchange channel to form hot water with a lower temperature. The hot water flows from the outlet of the second heat exchange channel to the warm water intake 108 for the user to take.

[0075] Specifically in this embodiment, the warm water intake 108 can be connected to the regeneration pipeline 200 through a warm water intake pipeline, and the connection point is located upstream of the regeneration valve 201. When warm water needs to be taken, the regeneration valve 201 is closed, and the hot water formed by heat exchange in the second heat exchange channel flows through the regeneration pipeline 200 and the warm water intake pipeline in sequence to the warm water intake 108.

[0076] The drainage pipeline 300 is used to drain the hot water after flushing in the pre-filter 1, so as to keep the hot water for flushing the pre-filter 1 in a flowing state and ensure the thermal regeneration effect on the pre-filter 1.

[0077] The drainage pipeline 300 can be specifically hermetically connected to the first water inlet 111, or the drainage pipeline 300 is connected to the water production pipeline 100 upstream of the pre-filter 1. It should be noted that when the drainage pipeline 300 is connected to the water production pipeline 100 upstream of the pre-filter 1, the connection point is located downstream of the first water inlet valve 104, and the first water inlet valve 104 can also prevent tap water from flowing into the drainage pipeline 300 when it is closed.

[0078] In some embodiments, a drain valve 301 is provided on the drainage pipeline 300. The drain valve 301 is opened when drainage is required and closed when the water purification system purifies water to ensure the normal operation of the water purification system.

[0079] After the thermal regeneration mode is executed, the temperature in the pre-filter 1 is relatively high. To protect the components at the rear end that are not resistant to high temperatures (such as the fine filter 2), it is necessary to cool the pre-filter 1. In some embodiments, the regeneration pipeline 200 is connected to the water storage unit 3. According to the end of the execution of the thermal regeneration mode, the control valve group controls the water purification system to execute a cooling and temperature reduction mode, and controls the normal temperature water in the water storage unit 3 to flow through the regeneration pipeline 200, the first water outlet 112, the pre-filter 1, the first water inlet 111, and the drainage pipeline 300 to realize the flushing and cooling of the pre-filter 1.

[0080] After the hot regeneration mode ends, the control valve group controls the water purification system to execute the cooling mode, and controls the normal-temperature water in the water storage unit 3 to flow through the regeneration pipeline 200 and the first water outlet 112 into the pre-filter 1 to flush and cool the pre-filter 1. The cooled water is discharged through the first water inlet 111 and the drainage pipeline 300. Therefore, by controlling the control valve group to make the water purification system execute the cooling mode, the hot water remaining in the pre-filter 1 during the hot regeneration mode can be quickly replaced, the pre-filter 1 can be quickly cooled down, the waiting time for the user to draw water can be reduced, and at the same time, it is avoided that the hot water flows into the downstream fine filter 2 and damages it and shortens its service life.

[0081] In some embodiments, the control valve group includes a pipeline switching structure. The pipeline switching structure has a first state in which the water storage unit 3 is communicated with the first heat exchange channel and a second state in which the water storage unit 3 is communicated with the regeneration pipeline 200. According to the hot regeneration mode executed by the water purification system, the pipeline switching structure is in the first state, and according to the cooling mode executed by the water purification system, the pipeline switching structure is in the second state.

[0082] With the above arrangement, when the water purification system executes the hot regeneration mode, the pipeline switching structure is in the first state, and the normal-temperature water in the water storage unit 3 flows into the first heat exchange channel through the pipeline switching structure and exchanges heat with the boiling water from the heating unit 6 in the second heat exchange channel. The heated hot water flows into the pre-filter 1 for hot regeneration; when the water purification system executes the cooling mode, the pipeline switching structure is in the second state, and the normal-temperature water in the water storage unit 3 flows into the regeneration pipeline 200 through the pipeline switching structure and flows into the pre-filter 1 through the regeneration pipeline 200 for flushing and cooling. Therefore, the pipeline switching structure plays a role in switching the connection state of the water storage unit 3 to realize the switching of the water purification system between the hot regeneration mode and the cooling mode.

[0083] As Figure 1 Or Figure 2 shown, in some embodiments, the pipeline switching structure includes a first solenoid valve 101 and a second solenoid valve 102. The inlet of the first solenoid valve 101 is connected to the water storage unit 3, the outlet of the first solenoid valve 101 is connected to the first heat exchange channel, the inlet of the second solenoid valve 102 is connected to the water storage unit 3, and the outlet of the second solenoid valve 102 is connected to the regeneration pipeline 200. Based on the pipeline switching structure being in the first state, the first solenoid valve 101 is opened, and based on the pipeline switching structure being in the second state, the second solenoid valve 102 is opened.

[0084] When the water purification system executes the thermal regeneration mode, the pipeline switching structure is in the first state, the first solenoid valve 101 is opened and the second solenoid valve 102 is closed. The normal temperature water in the water storage unit 3 flows into the first heat exchange channel through the first solenoid valve 101 and exchanges heat with the boiling water from the heating unit 6 in the second heat exchange channel. The hot water after heat exchange flows into the pre-filter 1 for thermal regeneration. When the water purification system executes the cooling and temperature reduction mode, the pipeline switching structure is in the second state, the second solenoid valve 102 is opened and the first solenoid valve 101 is closed. The normal temperature water in the water storage unit 3 flows into the regeneration pipeline 200 through the second solenoid valve 102 and then flows into the pre-filter 1 through the regeneration pipeline 200 for flushing and temperature reduction.

[0085] As Figure 3 Or Figure 4 As shown, in some other embodiments, the pipeline switching structure is a two-way valve 103. The water inlet 1031 of the two-way valve 103 is connected to the water storage unit 3. The first outlet 1032 of the two-way valve 103 is connected to the first heat exchange channel. The second outlet 1033 of the two-way valve 103 is connected to the regeneration pipeline 200. Based on the pipeline switching structure being in the first state, the water inlet 1031 and the first outlet 1032 of the two-way valve 103 are communicated. Based on the pipeline switching structure being in the second state, the water inlet 1031 and the second outlet 1033 of the two-way valve 103 are communicated.

[0086] When the water purification system executes the thermal regeneration mode, the pipeline switching structure is in the first state, the water inlet 1031 and the first outlet 1032 of the two-way valve 103 are communicated. The normal temperature water in the water storage unit 3 flows into the two-way valve 103 through the water inlet 1031, flows out through the first outlet 1032 and then flows into the first heat exchange channel and exchanges heat with the boiling water from the heating unit 6 in the second heat exchange channel. The hot water after heat exchange flows into the pre-filter 1 for thermal regeneration. When the water purification system executes the cooling and temperature reduction mode, the pipeline switching structure is in the second state, the water inlet 1031 and the second outlet 1033 of the two-way valve 103 are communicated. The normal temperature water in the water storage unit 3 flows into the two-way valve 103 through the water inlet 1031, flows out through the second outlet 1033, flows through the regeneration pipeline 200 and then flows into the pre-filter 1 for flushing and temperature reduction.

[0087] In addition to the above settings, in some embodiments, the control valve group further includes a drain valve 301 provided in the drain pipeline 300 and / or a regeneration valve 201 provided in the regeneration pipeline 200. For details, refer to the above description.

[0088] Since the temperature of the normal temperature water in the water storage unit 3 is constant (consistent with the environment), and the temperature of the boiling water in the heating unit 6 is constant, the hot water after heat exchange in the heat exchange unit 5 generally has a specific temperature. Factors such as environmental temperature changes are likely to affect the hot water after heat exchange in the heat exchange unit 5 not reaching the preset value. Based on this, in some embodiments, the water purification system further includes a temperature regulating device, which is connected to the regeneration pipeline 200 and is used to adjust the temperature of the hot water in the regeneration pipeline 200 to reach the preset value.

[0089] As Figures 1 to 4 shown, in some embodiments, the temperature regulating device includes a temperature regulating pipeline 400 and a temperature regulating valve 401. The two ends of the temperature regulating pipeline 400 are respectively connected to the heating unit 6 and the regeneration pipeline 200. The temperature regulating valve 401 is arranged on the temperature regulating pipeline 400 and is used to open when the temperature of the hot water in the regeneration pipeline 200 is lower than the preset value.

[0090] When the hot water after heat exchange in the heat exchange unit 5 flows into the regeneration pipeline 200 and the temperature of the hot water after heat exchange is lower than the preset value, the temperature regulating valve 401 is opened, so that the boiling water in the heating unit 6 flows into the regeneration pipeline 200 through the temperature regulating pipeline 400 and mixes with the hot water therein to raise the temperature of the hot water to reach the preset value.

[0091] Specifically, a temperature sensor can be arranged in the regeneration pipeline 200 to detect the real-time temperature of the hot water, which is convenient for controlling the opening and closing of the temperature regulating valve 401.

[0092] In this embodiment, to save pipeline setting, the temperature regulating pipeline 400 is communicated with the pipeline connecting the heating water outlet 62 and the second heat exchange channel. Thus, when the temperature regulating valve 401 is opened, a part of the boiling water in the pipeline connecting the heating water outlet 62 and the second heat exchange channel flows through the temperature regulating pipeline 400 and enters the regeneration pipeline 200 to realize the temperature rise of the hot water therein.

[0093] In this embodiment, to facilitate the adjustment of the water temperature at the warm water intake 108, the connection part of the temperature regulating pipeline 400 and the regeneration pipeline 200 is located upstream of the connection part of the warm water intake pipeline and the regeneration pipeline 200, so as to adjust the mixing ratio of the boiling water and the hot water after heat exchange through the temperature regulating valve 401 to adjust the temperature of the warm water intake 108 to meet the user's drinking water requirements for different temperatures.

[0094] As Figure 1 Or Figure 3As shown, in the case where the pre-filter element 1 includes a first filtration unit 11 and a second filtration unit 12, although the water stored in the water storage unit 3 is purified water, if the storage time is too long, its water quality will also change, for example, precipitation will occur. Based on this, in some embodiments, the water purification device further includes a post-filter element 4. The post-filter element 4 is arranged between the water storage unit 3 and the heat exchange unit 5, and can re-filter the purified water flowing out of the water storage unit 3 to improve the water quality.

[0095] The boiling water intake 107 is used to take the boiling water heated by the heating unit 6. The boiling water intake 107 can be communicated with the pipeline between the heating water outlet 62 and the second heat exchange channel. When taking hot water, the boiling water flows from the heating unit 6 through the pipeline between the heating water outlet 62 and the second heat exchange channel to the boiling water intake 107.

[0096] The water purification system further includes a boiling water intake 107. The boiling water intake 107 is connected to the regeneration pipeline 200, and the connection point is located upstream of the regeneration valve 201. With this setting, when taking hot water, the purified water from the water storage unit 3 or the water production pipeline 100 flows through the pipeline switching structure into the regeneration pipeline 200 and flows to the boiling water intake 107 through the regeneration pipeline 200.

[0097] It should be noted that before the thermal regeneration mode and the cooling mode, the water storage unit 3 should be filled with water when the water purification system produces water, and the heating unit 6 has heated the water to boiling and is in the heat preservation state, so that there is enough boiling water and normal temperature water when the thermal regeneration mode and the cooling mode are executed.

[0098] To facilitate the understanding of the water purification system of this embodiment, the working process is introduced as follows:

[0099] Among them, the case where Figure 7 、 Figure 8 the pre-filter element 1 of the water purification system in includes a first filtration unit 11 and a second filtration unit 12, and the pipeline switching structure includes a first solenoid valve 101 and a second solenoid valve 102 is described:

[0100] When the water purification system executes the thermal regeneration mode, the pipeline switching structure is in the first state. The first solenoid valve 101, the regeneration valve 201, and the drain valve 301 are all open, and the second solenoid valve 102, the first water inlet valve 104, the second water inlet valve 105, and the pressure stabilizing pump 106 are all closed. The normal temperature water in the water storage unit 3 flows into the first heat exchange channel through the first solenoid valve 101 and exchanges heat with the boiling water from the heating unit 6 in the second heat exchange channel. If the temperature of the exchanged hot water is lower than the preset value, the temperature regulating valve 401 is opened, and the boiling water flows into the regeneration pipeline 200 through the temperature regulating pipeline 400 to mix and heat the hot water. The hot water reaching the preset value flows through the regeneration pipeline 200 and the first water outlet 112 into the pre-filter 1 to perform thermal flushing regeneration on the pre-filter 1. The flushing hot water flows into the drain pipeline 300 through the first water inlet 111 and is discharged;

[0101] When the water purification system executes the cooling and temperature reduction mode, the pipeline switching structure is in the second state. The second solenoid valve 102, the regeneration valve 201, and the drain valve 301 are all open, and the first solenoid valve 101, the first water inlet valve 104, the second water inlet valve 105, and the pressure stabilizing pump 106 are all closed. The normal temperature water in the water storage unit 3 flows into the regeneration pipeline 200 through the second solenoid valve 102 and then flows through the regeneration pipeline 200 into the pre-filter 1 to flush and cool the pre-filter 1. The cooled water is discharged through the first water inlet 111 and the drain pipeline 300;

[0102] Among them, taking Figure 9 , Figure 10 as an example, the pre-filter 1 of the water purification system only includes the first filtering unit 11 and does not include the second filtering unit 12, and there is a post-filter 4 downstream of the water storage unit 3, and the pipeline switching structure is a two-way valve 103 for description:

[0103] When the water purification system executes the thermal regeneration mode, the pipeline switching structure is in the first state. The water inlet 1031 and the first outlet 1032 of the two-way valve 103 are connected. The regeneration valve 201 and the drain valve 301 are both open, and the first water inlet valve 104, the second water inlet valve 105, and the pressure stabilizing pump 106 are all closed. The normal temperature water in the water storage unit 3 flows into the first heat exchange channel through the water inlet 1031 and the first outlet 1032 and exchanges heat with the boiling water from the heating unit 6 in the second heat exchange channel. If the temperature of the exchanged hot water is lower than the preset value, the temperature regulating valve 401 is opened, and the boiling water flows into the regeneration pipeline 200 through the temperature regulating pipeline 400 to mix and heat the hot water. The hot water reaching the preset value flows through the regeneration pipeline 200 and the first water outlet 112 into the pre-filter 1 to perform thermal flushing regeneration on the pre-filter 1. The flushing hot water flows into the drain pipeline 300 through the first water inlet 111 and is discharged;

[0104] The water purification system executes the cooling mode. The pipeline switching structure is in the second state. The water inlet 1031 of the two-way valve 103 is communicated with the second outlet 1033. The regeneration valve 201 and the drain valve 301 are both opened, and the first water inlet valve 104, the second water inlet valve 105 and the pressure stabilizing pump 106 are all closed. The normal temperature water in the water storage unit 3 flows into the regeneration pipeline 200 through the water inlet 1031 and the second outlet 1033 and flows into the pre-filter 1 through the regeneration pipeline 200 to flush and cool the pre-filter 1. The cooled water is discharged through the first water inlet 111 and the drain pipeline 300.

[0105] In some embodiments, the duration of the thermal regeneration mode is T1, and the duration of the cooling mode is T2. Then, T1 > T2 is set.

[0106] By reasonably setting the duration of the thermal regeneration mode and the duration of the cooling mode, at least T1 > T2 is satisfied to ensure the thermal regeneration effect on the pre-filter 1.

[0107] In some embodiments, T2 < 5 min.

[0108] By setting the duration of the cooling mode T2 to be less than 5 minutes, it can not only achieve the cooling of the pre-filter 1 but also avoid wasting water resources.

[0109] The specific value of T2 can be 4 min, 3 min or 2 min, etc. Correspondingly, the specific value of T1 can be 5 min, 6 min or 7 min, etc. This embodiment does not make specific limitations.

[0110] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations fall within the scope defined by this application.

Claims

1. A water purification system, characterized in that, Comprising: A water production device, including a pre-filter (1), a water storage unit (3), and a heating unit (6) connected in series to a water production pipeline (100) in sequence. The pre-filter (1) includes an activated carbon component. The pre-filter (1) has a first water inlet (111) and a first water outlet (112). The water storage unit (3) is communicated with the first water outlet (112). The heating unit (6) has a heating water inlet (61) and a heating water outlet (62). The heating water outlet (62) is connected to a boiling water intake (107). A heat regeneration device, including a heat exchange unit (5), a regeneration pipeline (200), and a drainage pipeline (300). The heat exchange unit (5) has a first heat exchange channel and a second heat exchange channel. Two ends of the first heat exchange channel are respectively connected to the water storage unit (3) and the heating water inlet (61). Two ends of the second heat exchange channel are respectively connected to the heating water outlet (62) and the regeneration pipeline (200). The regeneration pipeline (200) is connected to the first water outlet (112). The drainage pipeline (300) is connected to the first water inlet (111). A control valve group is arranged on the water production pipeline (100) and the regeneration pipeline (200). The control valve group can control the water purification system to execute a heat regeneration mode, and control the boiling water of the heating unit (6) to flow into the second heat exchange channel and exchange heat with the normal temperature water from the water storage unit (3) in the first heat exchange channel to form hot water with a preset value. The hot water flows through the regeneration pipeline (200), the first water outlet (112), the pre-filter (1), the first water inlet (111), and the drainage pipeline (300) to realize reverse heat flushing regeneration of the pre-filter (1).

2. The water purification system according to claim 1, wherein The regeneration pipeline (200) is connected to the water storage unit (3). According to the end of the execution of the heat regeneration mode, the control valve group controls the water purification system to execute a cooling and temperature reduction mode, and controls the normal temperature water in the water storage unit (3) to flow through the regeneration pipeline (200), the first water outlet (112), the pre-filter (1), the first water inlet (111), and the drainage pipeline (300) to realize flushing and cooling of the pre-filter (1).

3. The water purification system according to claim 2, characterized in that, The control valve group includes a pipeline switching structure. The pipeline switching structure has a first state in which the water storage unit (3) is communicated with the first heat exchange channel and a second state in which the water storage unit (3) is communicated with the regeneration pipeline (200). According to the execution of the heat regeneration mode by the water purification system, the pipeline switching structure is in the first state. According to the execution of the cooling and temperature reduction mode by the water purification system, the pipeline switching structure is in the second state.

4. The water purification system according to claim 3, wherein The pipeline switching structure includes a first solenoid valve (101) and a second solenoid valve (102). The inlet of the first solenoid valve (101) is connected to the water storage unit (3), the outlet of the first solenoid valve (101) is connected to the first heat exchange channel, the inlet of the second solenoid valve (102) is connected to the water storage unit (3), and the outlet of the second solenoid valve (102) is connected to the regeneration pipeline (200). Based on the pipeline switching structure being in the first state, the first solenoid valve (101) is opened. Based on the pipeline switching structure being in the second state, the second solenoid valve (102) is opened.

5. The water purification system according to claim 3, characterized in that, The pipeline switching structure is a two-way valve (103). The water inlet (1031) of the two-way valve (103) is connected to the water storage unit (3), the first outlet (1032) of the two-way valve (103) is connected to the first heat exchange channel, and the second outlet (1033) of the two-way valve (103) is connected to the regeneration pipeline (200). Based on the pipeline switching structure being in the first state, the water inlet (1031) and the first outlet (1032) of the two-way valve (103) are communicated. Based on the pipeline switching structure being in the second state, the water inlet (1031) and the second outlet (1033) of the two-way valve (103) are communicated.

6. The water purification system according to any one of claims 1 to 5, characterized in that, The control valve group further includes a drain valve (301) provided on the drain pipeline (300) and / or a regeneration valve (201) provided on the regeneration pipeline (200).

7. The water purification system according to any one of claims 1 to 5, characterized in that, The water purification system further includes a temperature adjustment device. The temperature adjustment device is connected to the regeneration pipeline (200), and the temperature adjustment device is used to adjust the temperature of the hot water in the regeneration pipeline (200) to reach the preset value.

8. The water purification system according to claim 7, characterized in that, The temperature adjustment device includes a temperature adjustment pipeline (400) and a temperature adjustment valve (401). The two ends of the temperature adjustment pipeline (400) are respectively connected to the heating unit (6) and the regeneration pipeline (200). The temperature adjustment valve (401) is provided on the temperature adjustment pipeline (400), and the temperature adjustment valve (401) is used to open when the temperature of the hot water in the regeneration pipeline (200) is lower than the preset value.

9. The water purification system according to any one of claims 1 to 5, characterized in that, The pre-filter (1) includes a first filtering unit (11). The first filtering unit (11) includes the activated carbon component. The first water inlet (111) is connected to the inlet of the first filtering unit (11), and the first water outlet (112) is connected to the outlet of the first filtering unit (11).

10. The water purification system according to claim 9, characterized in that, The pre-filter (1) has a second water inlet (121) and a second water outlet (122). The pre-filter (1) further includes a second filtering unit (12) independently provided from the first filtering unit (11). The second filtering unit (12) includes the activated carbon component. The second water inlet (121) is connected to the inlet of the second filtering unit (12), the second water outlet (122) is connected to the outlet of the second filtering unit (12), and the water storage unit (3) is connected to the second water outlet (122).

11. The water purification system according to claim 10, characterized in that, The water purification device further includes a fine filter (2). The fine filter (2) has a fine filter water inlet (21) and a pure water outlet (22). The fine filter water inlet (21) is connected to the first water outlet (112), and the pure water outlet (22) is connected to the second water inlet (121).

12. The water purification system according to any one of claims 1 to 5, characterized in that, The water purification device further includes a post-filter (4). The post-filter (4) is arranged between the water storage unit (3) and the heat exchange unit (5).

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