Water purification device and method using RO membrane wastewater as bubble water raw water

Abstract

The invention discloses a water purifying device and method using RO membrane wastewater as bubble water raw water, and belongs to the technical field of household appliances. The water purifying device comprises an RO (reverse osmosis) membrane filtering assembly and a water purifying assembly, wherein an RO wastewater outlet is formed in the RO membrane filtering assembly; a first storage circulation opening and a second storage circulation opening are formed in the wastewater storage part, and the first storage circulation opening is communicated with the RO wastewater outlet through a wastewater valve; the air pump outputs air through a first one-way valve; the bubble water booster pump is provided with a bubble water booster inlet and a bubble water booster outlet, and the bubble water booster inlet is communicated with the gas outlet of the first one-way valve and the second storage circulation port; a mixed gas inlet and a mixed gas outlet are formed in the gas mixing tank, the mixed gas inlet is communicated with the bubble water pressurization outlet through a second one-way valve, and the output direction of the second one-way valve points to the mixed gas inlet from the bubble water pressurization outlet; and the bubbler is communicated with the mixed gas outlet through a bubble water outlet valve. According to the invention, wastewater discharge can be reduced, and efficient utilization of resources is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a water purification device and method using RO membrane wastewater as raw water for bubble water. Background Art

[0002] Most existing water purifier products use reverse osmosis membrane (RO membrane) as the final step of filtration to remove impurities such as salt ions, bacteria, viruses, etc. in the water to obtain relatively pure drinking water.

[0003] There are also water purifiers with a bubble water function, which mixes coarsely filtered water with gas and obtains bubble water after pressurization and bubbling. Bubble water can be used to wash vegetables and fruits. Through the action of bubbles, it can deeply clean the gaps on the surface of the food, absorb and take away various dirt and residues.

[0004] However, the RO filtration process on existing water purifiers also produces wastewater, which is often discharged directly, which not only constitutes a waste of water resources, but also runs counter to the requirements of green environmental protection. The cleaning effect of sparkling water also has room for further improvement. Summary of the invention

[0005] In order to solve the above technical problems, the present application further improves the internal structure of the existing water purifier, in order to improve the utilization efficiency of water resources and enhance the cleaning effect of bubble water. One of the purposes of the present invention is to provide a water purification device that uses RO membrane wastewater as bubble water raw water, and the second purpose is to provide a corresponding bubble water preparation method.

[0006] The specific technical solution is described below:

[0007] A water purification device using RO membrane wastewater as raw water for bubble water, comprising:

[0008] An RO membrane filtration assembly having an RO wastewater outlet;

[0009] A wastewater storage element, on which a first storage flow port and a second storage flow port are provided, wherein the first storage flow port is connected to the RO wastewater outlet through a wastewater valve;

[0010] an air pump that outputs gas through a first one-way valve;

[0011] a bubble water booster pump, on which a bubble water booster inlet and a bubble water booster outlet are provided, wherein the bubble water booster inlet is connected to the gas outlet of the first one-way valve and the second storage flow port;

[0012] A gas mixing tank, on which a gas mixing inlet and a gas mixing outlet are provided, wherein the gas mixing inlet is connected to the bubble water pressurization outlet via a second one-way valve, and an output direction of the second one-way valve is from the bubble water pressurization outlet to the gas mixing inlet;

[0013] The bubbler is connected with the mixed gas outlet through a bubble water outlet valve.

[0014] In the above technical solution, the wastewater obtained by RO membrane filtration is not directly discharged, but collected and used as a water source for preparing bubble water, thereby saving water resources, improving the overall efficiency of the water purification system, and making the water purifier more in line with green environmental protection requirements;

[0015] At the same time, the wastewater generated by RO membrane filtration has relatively high content of magnesium and calcium ions due to the concentration effect of the RO membrane. When washing vegetables with such water, the salt ions can react with the oxalic acid in the vegetables to precipitate oxalate, thereby reducing the oxalic acid content. The characteristics of sparkling water allow the salt ions to penetrate deeply and fully into every corner and crevice of the food, making the effect of removing oxalic acid more significant. Eating vegetables washed with such sparkling water can more effectively prevent the formation of stones in the consumer's body.

[0016] Preferably, the wastewater storage element is a pressure barrel.

[0017] Further preferably, it also includes a wastewater discharge pipeline and a first pressure switch, and the wastewater discharge pipeline is provided with a wastewater drain valve;

[0018] The first pressure switch detects the pressure in the pressure barrel. When the pressure is higher than a set value, the first pressure switch controls the wastewater drain valve to open, so that the wastewater in the pressure barrel is discharged through the first storage flow port and the wastewater drain valve.

[0019] Preferably, it also includes a bubble water replenishment pipeline, on which a replenishment water inlet valve and a third one-way valve are arranged, and the replenished water flows through the replenishment water inlet valve and then outputs through the third one-way valve;

[0020] After the water outputted by the third one-way valve merges with the gas outputted by the first one-way valve, the water flows into the bubble water booster pump through the bubble water booster inlet.

[0021] Further preferably, a second pressure switch is included, which detects the pressure in the pressure barrel. When the pressure is lower than a set value, the second pressure switch controls the water replenishment inlet valve to open, so that the replenished water is output through the third one-way valve.

[0022] A method for preparing sparkling water comprises the following steps:

[0023] S1: The wastewater generated by the RO membrane filtration component is input into the wastewater storage element for storage;

[0024] S2: When it is necessary to prepare bubble water, the second storage flow port on the wastewater storage element is opened to output the wastewater, and the air pump is turned on to output the gas, so that the mixture of the wastewater and the gas flows into the bubble water booster pump;

[0025] S3: The bubble water booster pump pressurizes the mixture and inputs it into the gas mixing tank;

[0026] S4: The above mixture is mixed with gas in a mixing tank and then foamed by a bubbler to form sparkling water.

[0027] Preferably, in step S1, when the amount of wastewater stored in the wastewater storage element exceeds the amount, at least part of the wastewater in the wastewater storage element is discharged through the wastewater drain valve.

[0028] Further preferably, in step S1, the pressure in the wastewater storage element is detected by a first pressure switch. When the pressure is higher than a set value, the first pressure switch controls the wastewater drain valve to open, so that the wastewater in the wastewater storage element is discharged through the first storage flow port and the wastewater drain valve.

[0029] Preferably, in step S2, when the wastewater stored in the wastewater storage element is insufficient, additional water is added, and the mixture of the added water and the above-mentioned gas flows into the bubble water booster pump.

[0030] Further preferably, in step S2, the pressure in the wastewater storage element is detected by a second pressure switch;

[0031] When the pressure is higher than the set value, the second storage flow port on the wastewater storage element is opened to output the wastewater, and the air pump is turned on to output the gas, so that the mixture of the wastewater and the gas flows into the bubble water booster pump;

[0032] When the pressure is lower than the set value, the second pressure switch controls the water replenishment inlet valve to open, output the replenished water, and turns on the air pump to output gas, so that the mixture of the replenished water and gas flows into the bubble water booster pump.

[0033] In summary, the technical solution of the present invention has the following main beneficial effects:

[0034] Compared with the prior art, the technical solution of the present invention stores the wastewater generated during the RO membrane filtration process and uses it to prepare bubble water, which saves water resources to the greatest extent, improves the overall efficiency of the water purification system, and makes the water purifier more environmentally friendly.

[0035] At the same time, the wastewater produced by RO membrane filtration has high hardness characteristics, and the content of magnesium and calcium ions in it is relatively high. When washing vegetables with such water, the salt ions can react with the oxalic acid in the vegetables to precipitate oxalate, thereby reducing the content of oxalic acid and preventing the formation of stones in the body.

[0036] Furthermore, the properties of sparkling water allow salt ions to penetrate deeply and fully into every nook and cranny of food materials, making the effect of removing oxalic acid more significant.

[0037] Furthermore, the introduction of wastewater for the preparation of sparkling water will not have an adverse effect on the pure water preparation process, nor will it limit the amount and duration of sparkling water.

[0038] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structural flow of the water purifier recorded in the embodiment.

[0040] Reference numerals:

[0041] 1: RO membrane filtration component, 1.1: RO wastewater outlet, 2: wastewater storage element, 2.1: first storage flow port, 2.2: second storage flow port, 3: air pump, 4: bubble water booster pump, 4.1: bubble water booster inlet, 4.2: bubble water booster outlet, 5: gas mixing tank, 5.1: gas mixing inlet, 5.2: gas mixing outlet, 6: bubbler, 7: composite filter element, 8: reverse osmosis booster pump, 9: flow control pump, 10: TDS meter, 11: flow meter, 12: heating element;

[0042] a: wastewater valve, b: first one-way valve, c: second one-way valve, d: bubble water outlet valve, e: first pressure switch, f: wastewater drain valve, g: make-up water inlet valve, h: third one-way valve, i: second pressure switch, j: fourth one-way valve, k: main inlet valve, l: pressure reducing valve, m: cold water outlet valve. DETAILED DESCRIPTION

[0043] The present invention is further explained with reference to the following embodiments:

[0044] The core technical problem faced by the technical solution of the embodiment of the present application comes from the inventor's accurate understanding of the prior art. Therefore, how to improve the utilization efficiency of water resources and enhance the cleaning effect of bubble water is a technical problem that the inventor urgently needs to solve.

[0045] It should be noted that the embodiments do not constitute a limitation on the protection scope of the claims of the present invention. According to the technical concepts provided / proven by the embodiments, all technical solutions that can be reasonably anticipated by technicians in the relevant technical field should be included in the protection scope of the claims of the present invention.

[0046] The embodiments are described in detail as follows:

[0047] Please refer to the attached Figure 1 , this embodiment provides a water purifier, which has a purified water outlet function and a bubble water outlet function.

[0048] In terms of the water purification function, the raw water first flows into the composite filter element 7 from the water inlet for pre-filtration. After the preliminary filtration, the water flows through the pressure reducing valve 1 to reduce the pressure, and then passes through the main water inlet valve k to enter the reverse osmosis booster pump 8 to increase the pressure to a suitable level. The pressurized water then flows into the RO membrane filter assembly 1 for filtration. The purified water filtered by the RO membrane filter assembly 1 flows back to the composite filter element 7 for post-filtration. The post-filtration and the aforementioned pre-filtration are integrated in the composite filter element 7, but the post-filtration and pre-filtration are not connected to each other in the composite filter element 7. The purified water after the post-filtration flows out from the cold water outlet valve m and can be directly drunk or used for other purposes.

[0049] In the above-mentioned purified water outlet pipeline, a TDS meter 10 is provided at the outlet of the post-filtration for detecting the total dissolved solid content of the water body. The composite filter element 7 is a PCB filter element, in which the pre-filtration mainly includes a primary filtration component with screening, and the post-filtration is an activated carbon filtration for improving the taste of the water body. The main water inlet valve k and the cold water outlet valve m are both solenoid valves.

[0050] The purified water outlet pipeline in this embodiment also includes a hot water outlet pipeline. After the above-mentioned pure water is filtered in the composite filter element 7, it flows into the flow control pump 9, is output at a suitable flow rate, and further flows through the flow meter 11 and the heating element 12 to form hot water for drinking or other uses;

[0051] When the amount of pure water after post-filtration exceeds the amount controlled by the flow control pump 9, the excess pure water flows out through the fourth one-way valve j and returns to the inlet of the reverse osmosis booster pump 8 for re-pressurization. The heating element 12 in the hot water outlet pipeline is a tubular heater.

[0052] In the technical solution of the above embodiment, the filtration process of the RO membrane filtration assembly 1 will also produce wastewater. If the wastewater is directly discharged, it will undoubtedly increase the water cost and have an adverse impact on the environment. Therefore, this embodiment designs a bubble water outlet pipeline using RO filtered wastewater as raw material;

[0053] Please continue to refer to the attached Figure 1In the bubble water outlet pipeline, the wastewater first flows out through the RO wastewater outlet 1.1, and is input into the wastewater storage element 2 through the first storage flow port 2.1 for storage. The wastewater storage element 2 in this embodiment is a pressure barrel, and the second storage flow port 2.2 of the wastewater storage element 2 outputs the stored wastewater, and the air pump 3 outputs gas, which is then output through the first one-way valve b, and after merging with the aforementioned output stored wastewater, flows into the bubble water booster pump 4 through the bubble water booster inlet 4.1 for boosting, and the boosted gas-water mixture flows out through the bubble water booster outlet 4.2, and is output to the gas mixing inlet 5.1 through the second one-way valve c, and enters the gas mixing tank 5 for gas mixing, and after gas mixing, it is output through the gas mixing outlet 5.2 of the gas mixing tank 5, and then flows through the bubble water outlet valve d and the bubbler 6 for foaming, to obtain the bubble water prepared from the wastewater, which can be used for washing vegetables or for other purposes;

[0054] The bubble water outlet valve d in the bubble water outlet pipeline is a solenoid valve;

[0055] In this embodiment, the wastewater generated by the RO membrane filtration component 1 is used to prepare bubble water, which not only realizes the efficient use of water resources, but also enables the bubble water to obtain a better vegetable washing effect, which is reflected in that the wastewater generated by RO filtration has a high hardness characteristic and contains a high concentration of magnesium and calcium ions. When washing vegetables with such water, salt ions can react with oxalic acid in vegetables to precipitate oxalate, thereby reducing the oxalic acid content and preventing the formation of stones in the body. The characteristics of bubble water further expand this advantage, which is reflected in that the effect of bubbles enables salt ions to penetrate deeply and more fully contact every corner and crevice of the food, making the effect of removing oxalic acid more significant.

[0056] In the preferred embodiment, please continue to refer to the attached Figure 1 The bubble water outlet pipeline also includes a wastewater discharge pipeline and a first pressure switch e, and a wastewater drain valve f is provided on the wastewater discharge pipeline;

[0057] The first pressure switch e is used to detect the pressure in the pressure barrel. When the pressure is higher than the set value, it means that the water storage in the pressure barrel has reached the upper limit. At this time, the first pressure switch e controls the wastewater drain valve f to open, so that the wastewater in the pressure barrel is discharged through the first storage flow port 2.1 and the wastewater drain valve f, ensuring the normal operation of the pure water system;

[0058] The wastewater drain valve f in this embodiment is a solenoid valve.

[0059] In the preferred embodiment, please continue to refer to the attached Figure 1The bubble water outlet pipeline also includes a bubble water replenishment pipeline, and a replenishment water inlet valve g and a third one-way valve h are arranged on the bubble water replenishment pipeline. The inlet of the replenishment water inlet valve g is connected with the preliminary filtered water after flowing through the pressure reducing valve l. When a large flow of bubble water is needed or the water storage in the pressure barrel is insufficient, the replenished water flows through the replenishment water inlet valve g and is output through the third one-way valve h, and then merges with the gas output by the above-mentioned air pump 3 through the first one-way valve b. After merging, it flows into the bubble water booster pump 4 through the bubble water booster inlet 4.1 for boosting. The boosted gas-water mixture flows out through the bubble water booster outlet 4.2, and is output to the gas mixing inlet 5.1 through the second one-way valve c, and enters the gas mixing tank 5 for gas mixing. After gas mixing, it is output through the gas mixing outlet 5.2 of the gas mixing tank 5, and then flows through the bubble water outlet valve d and the bubbler 6 for foaming to obtain bubble water, which can be used for washing vegetables or for other purposes;

[0060] In a further preferred embodiment, a second pressure switch i is further provided to detect the pressure in the pressure barrel. When the pressure is higher than the set value, it means that the water stored in the pressure barrel is sufficient. At this time, the water replenishment inlet valve g is in a closed state, and waste water flows out from the second storage flow port 2.2 of the pressure barrel to prepare sparkling water.

[0061] When the pressure is lower than the set value, it means that the water output in the pressure tank is insufficient. At this time, the second pressure switch i controls the water replenishment inlet valve g to open, so that the replenished water is output through the third one-way valve h to prepare the bubble water, thereby ensuring that the bubble water can be in the water making state for a long time;

[0062] The water replenishment inlet valve g and the bubble water outlet valve d in this embodiment are both solenoid valves.

[0063] The method for preparing the sparkling water involved in this embodiment comprises the following steps:

[0064] S1: the wastewater valve a is in an open state, the wastewater drain valve f is in a closed state, the wastewater generated by the RO membrane filtration assembly 1 is input into the wastewater storage element 2 for storage, the first pressure switch e detects the pressure in the wastewater storage element 2, when the pressure is higher than the set value of the first pressure switch e, the wastewater storage element 2 is in a full load state, at this time the first pressure switch e controls the wastewater drain valve f to open, so that the wastewater in the wastewater storage element 2 is discharged through the first storage flow port 2.1 and the above wastewater drain valve f, to ensure the normal operation of the pure water system;

[0065] S2: The second pressure switch i detects the pressure in the wastewater storage element 2. When it is necessary to prepare sparkling water:

[0066] When the pressure is higher than the set value of the second pressure switch i, there is wastewater in the wastewater storage element 2, the second storage flow port 2.2 on the wastewater storage element 2 is opened to discharge the wastewater, and the air pump 3 is turned on to discharge the gas, so that the mixture of wastewater and gas flows into the bubble water booster pump 4;

[0067] When the pressure is lower than the set value of the second pressure switch i, the wastewater stored in the wastewater storage element 2 is insufficient and additional water source is needed. The main water inlet valve k is closed, and the second pressure switch i is controlled to open the water replenishment inlet valve g. The raw water is initially filtered by the composite filter element 7 and then decompressed by the pressure reducing valve 1 and then transported to the inlet of the water replenishment inlet valve g to obtain replenished water. The air pump 3 is turned on to output gas, so that the mixture of replenished water and gas flows into the bubble water booster pump 4 to continuously obtain the water source of bubble water.

[0068] S3: the bubble water booster pump 4 pressurizes the mixture and inputs it into the gas mixing tank 5 for gas-liquid mixing;

[0069] S4: the bubble water outlet valve d is opened, and the above mixture is mixed with gas in the gas mixing tank 5 and then foamed by the bubbler 6 to form bubble water.

[0070] In the description of this specification, the description with reference to the terms "embodiment", "basic embodiment", "preferred embodiment", "other embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A water purification device using RO membrane wastewater as raw water for bubble water, characterized in that: Included are: An RO membrane filtration assembly (1) is provided with an RO wastewater outlet (1.1); A wastewater storage element (2) having a first storage flow port (2.1) and a second storage flow port (2.2) provided thereon, wherein the first storage flow port (2.1) is connected to the RO wastewater outlet (1.1) via a wastewater valve (a); An air pump (3) which outputs gas through a first one-way valve (b); a bubble water boosting pump (4), on which a bubble water boosting inlet (4.1) and a bubble water boosting outlet (4.2) are provided, wherein the bubble water boosting inlet (4.1) is connected to the gas outlet of the first one-way valve (b) and the second storage flow port (2.2); A gas mixing tank (5) is provided with a gas mixing inlet (5.1) and a gas mixing outlet (5.2), the gas mixing inlet (5.1) is connected to the bubble water pressurizing outlet (4.2) via a second one-way valve (c), and the output direction of the second one-way valve (c) is directed from the bubble water pressurizing outlet (4.2) to the gas mixing inlet (5.1); The bubbler (6) is connected to the gas mixing outlet (5.2) via a bubble water outlet valve (d).

2. The water purification device according to claim 1, characterized in that: The wastewater storage element (2) is a pressure barrel.

3. The water purification device according to claim 2, characterized in that: It also includes a wastewater discharge pipeline and a first pressure switch (e), wherein the wastewater discharge pipeline is provided with a wastewater drain valve (f); The first pressure switch (e) detects the pressure in the pressure barrel. When the pressure is higher than a set value, the first pressure switch (e) controls the wastewater drainage valve (f) to open, so that the wastewater in the pressure barrel is discharged through the first storage flow port (2.1) and the wastewater drainage valve (f).

4. The water purification device according to claim 2, characterized in that: It also includes a bubble water replenishment pipeline, on which a replenishment water inlet valve (g) and a third one-way valve (h) are arranged, and the replenished water flows through the replenishment water inlet valve (g) and then outputs through the third one-way valve (h); After the water outputted by the third one-way valve (h) merges with the gas outputted by the first one-way valve (b), the water flows into the bubble water booster pump (4) through the bubble water booster inlet (4.1).

5. The water purification device according to claim 4, characterized in that: The invention also includes a second pressure switch (i), which detects the pressure in the pressure barrel. When the pressure is lower than a set value, the second pressure switch (i) controls the water replenishment inlet valve (g) to open, so that the replenished water is output through the third one-way valve (h).

6. A method for preparing sparkling water, characterized in that: The steps include: S1: The wastewater generated by the RO membrane filtration component (1) is input into the wastewater storage element (2) for storage; S2: When it is necessary to prepare bubble water, the second storage flow port (2.2) on the wastewater storage element (2) is opened to output the wastewater, and the air pump (3) is turned on to output the gas, so that the mixture of the wastewater and the gas flows into the bubble water booster pump (4); S3: The bubble water booster pump (4) boosts the pressure of the mixture and inputs it into the gas mixing tank (5); S4: The above mixture is mixed with gas in the gas mixing tank (5) and then foamed by the bubbler (6) to form bubble water.

7. The water purification device according to claim 6, characterized in that: In step S1, when the amount of wastewater stored in the wastewater storage element (2) exceeds the limit, at least part of the wastewater in the wastewater storage element (2) is discharged through the wastewater drain valve (f).

8. The water purification device according to claim 7, characterized in that: In step S1, the pressure in the wastewater storage element (2) is detected by the first pressure switch (e). When the pressure is higher than a set value, the first pressure switch (e) controls the wastewater drainage valve (f) to open, so that the wastewater in the wastewater storage element (2) is discharged through the first storage flow port (2.1) and the wastewater drainage valve (f).

9. The water purification device according to claim 6, characterized in that: In step S2, when the wastewater stored in the wastewater storage element (2) is insufficient, additional water is added, and the mixture of the added water and the above-mentioned gas flows into the bubble water booster pump (4).

10. The water purification device according to claim 9, characterized in that: In step S2, the pressure in the wastewater storage element (2) is detected by the second pressure switch (i); When the pressure is higher than the set value, the second storage flow port (2.2) on the wastewater storage element (2) is opened to discharge the wastewater, and the air pump (3) is turned on to discharge the gas, so that the mixture of the wastewater and the gas flows into the bubble water booster pump (4); When the pressure is lower than the set value, the second pressure switch (i) controls the water replenishment inlet valve (g) to open, output the replenished water, and turns on the air pump (3) to output the gas, so that the mixture of the replenished water and the gas flows into the bubble water booster pump (4).

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