Circulating wastewater treatment device and domestic wastewater-free water purifier

Abstract

The present disclosure provides a circulating wastewater treatment device and a household wastewater-free water purifier. The circulating wastewater treatment device is suitable for a household water purifier and comprises a wastewater pipeline and a mixing tank. One end of the wastewater pipeline is suitable for connecting a wastewater outlet of the household water purifier. A one-way valve is arranged on the wastewater pipeline to prevent wastewater from flowing back in the pipeline. The mixing tank comprises a tank body. A first water inlet, a second water inlet and a first water outlet are arranged on the tank body. The first water inlet is connected to the other end of the wastewater pipeline to receive wastewater flowing out of the wastewater pipeline. The second water inlet is communicated with a tap water pipeline to introduce tap water into the tank body, so that the wastewater and the tap water are mixed to be preliminarily diluted and form mixed water. The first water outlet is communicated with a water inlet of the household water purifier to supply the mixed water to the household water purifier. In the interval time of water production of the household water purifier, the mixed water in the tank body is continuously diluted by the tap water in the tap water pipeline.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology for water purifiers, and more particularly to a circulating wastewater treatment device and a household wastewater-free water purifier. Background Technology

[0002] Reverse osmosis water purifiers are highly efficient and safe water purification devices widely used in homes, industries, and other fields. However, during use, reverse osmosis water purifiers generate a large amount of wastewater, which not only wastes precious water resources but also increases the cost of wastewater treatment.

[0003] In existing technologies, the wastewater discharge from reverse osmosis water purifiers mainly depends on factors such as the flux of the filter membrane, the pore size of the filter membrane, and the wastewater recycling method. Currently, some reverse osmosis water purifiers employ wastewater recovery devices to collect and store wastewater, releasing it only when water is needed. However, these wastewater recovery devices have drawbacks such as low recovery efficiency and excessively long wastewater storage times. Furthermore, some reverse osmosis water purifiers use water-saving filter membranes to reduce wastewater generation. However, the filtration efficiency of these membranes may be affected, and manufacturing costs may increase. Therefore, how to rationally and effectively utilize the wastewater discharged from reverse osmosis water purifiers and improve water resource utilization efficiency has become an urgent problem to be solved. Summary of the Invention

[0004] To address at least one of the problems in the prior art, embodiments of this disclosure provide a circulating wastewater treatment device, which includes a mixing tank suitable for connection with both tap water and wastewater pipes. This allows wastewater and tap water to be mixed and diluted within the tank, and the diluted mixture is then supplied to a household water purifier through an outlet, thus achieving wastewater recycling.

[0005] This disclosure provides a circulating wastewater treatment device suitable for household water purifiers, comprising a wastewater pipeline and a mixing tank. One end of the wastewater pipeline is connected to the wastewater outlet of the household water purifier, and a one-way valve is installed on the wastewater pipeline. The mixing tank includes a tank body, on which a first inlet, a second inlet, and a first outlet are provided. The first inlet is connected to the other end of the wastewater pipeline to receive wastewater flowing out of the wastewater pipeline; the second inlet is connected to a tap water pipeline to introduce tap water to initially dilute the wastewater in the tank body and form a mixed water; the first outlet is connected to the inlet of the household water purifier. During the water production interval, the mixed water is continuously diluted by tap water in the tap water pipeline.

[0006] According to some embodiments of this disclosure, the mixing tank includes a first tank, a second tank, and a valve assembly. The first tank includes: a first inlet connected to the other end of the wastewater pipeline for receiving wastewater flowing out of the wastewater pipeline; a second inlet connected to a tap water pipeline; and a first outlet connected to the inlet of the household water purifier. The second tank includes: a third inlet connected to the other end of the wastewater pipeline for receiving wastewater flowing out of the wastewater pipeline; a fourth inlet connected to a tap water pipeline; and a second outlet connected to the inlet of the household water purifier. A valve assembly is disposed on the wastewater pipeline, and the valve assembly is configured to periodically connect one of the first and second tanks and close the other.

[0007] According to some embodiments of this disclosure, the distance between the second water inlet and the first water outlet is less than the distance between the first water inlet and the first water outlet.

[0008] According to some embodiments of this disclosure, the mixing tank further includes a partition plate disposed on the inner side wall of the tank body. The partition plate is adapted to form a channel within the tank body for the flow of the mixed water. The first inlet and the first outlet are respectively located at opposite ends of the channel.

[0009] According to some embodiments of this disclosure, there are multiple partitions, which are staggered at intervals within the box to divide the space within the box into multiple S-shaped water channels. The first water inlet and the first water outlet are located at opposite ends of the S-shaped water channels, and the second water inlet is adjacent to the first water outlet.

[0010] According to some embodiments of this disclosure, the partition is a spiral plate that divides the internal space of the box into a spiral water channel. The first water inlet and the first water outlet are located at the two ends of the spiral water channel, and the second water inlet is arranged adjacent to the first water outlet.

[0011] According to some embodiments of this disclosure, the above-mentioned circulating wastewater treatment device further includes a housing for accommodating the mixing tank, and a connecting assembly disposed on the housing, wherein the connecting assembly is adapted to fix the housing to the housing of the household water purifier.

[0012] According to some embodiments of this disclosure, the outer casing is a flat or cylindrical box-shaped structure, and the outer casing is suitable for attaching to the side or bottom surface of the household water purifier.

[0013] According to some embodiments of this disclosure, the top or side surface of the outer casing is recessed inward to form a slot, the shape of which is adapted to the shape of the household water purifier so as to accommodate the household water purifier in the slot.

[0014] According to some embodiments of this disclosure, the outer casing is an L-shaped box, and the outer casing is respectively attached to the side and bottom of the household water purifier.

[0015] According to some embodiments of this disclosure, the volume of the mixing tank is 5 to 10 L.

[0016] Another aspect of this disclosure provides a household wastewater-free water purifier, comprising a water purification component and a circulating wastewater treatment device as described in any of the above embodiments. The water purification component includes an inlet and a wastewater outlet. The wastewater pipeline of the circulating wastewater treatment device is connected to the wastewater outlet, and the first outlet of the mixing tank of the circulating wastewater treatment device is connected to the inlet. The mixing tank is disposed on the side and / or bottom of the water purification component.

[0017] According to the circulating wastewater treatment device provided in this disclosure, the wastewater discharged from the reverse osmosis water purifier has a similar water quality to the tap water. By setting up a mixing tank connected to the tap water pipe and the wastewater pipe, the discharged wastewater and tap water are mixed and diluted in the tank to obtain mixed water. Furthermore, the pollutants in the mixed water can also diffuse through the tap water in the tap water pipe to achieve a continuous dilution effect. Finally, the diluted mixed water is supplied to the household water purifier through the first outlet, realizing zero wastewater discharge from the water purifier. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a circulating wastewater treatment apparatus according to an exemplary embodiment of the present disclosure;

[0019] Figure 2 This is a block diagram illustrating the working principle of a circulating wastewater treatment device and a household water purifier according to exemplary embodiments of the present disclosure.

[0020] Figure 3 This is a schematic diagram showing the connection relationship between another circulating wastewater treatment device and a household water purifier according to an exemplary embodiment of the present disclosure;

[0021] Figure 4 yes Figure 3 The diagram shows the working principle of a circulating wastewater treatment device and a household water purifier.

[0022] Figure 5 This is a three-dimensional structural cross-sectional view of a mixing tank body with multiple partitions spaced apart according to an exemplary embodiment of the present disclosure;

[0023] Figure 6 This is a three-dimensional structural cross-sectional view of a mixing tank body with a spiral baffle according to an exemplary embodiment of the present disclosure;

[0024] Figure 7 This is a schematic diagram illustrating various housings of a circulating wastewater treatment apparatus according to exemplary embodiments of the present disclosure and their connection relationships with a household water purifier; and

[0025] Figure 8 This is a block diagram illustrating the effect testing principle of a circulating wastewater treatment device according to an exemplary embodiment of the present disclosure.

[0026] The meanings of the reference numerals in the above figures are as follows:

[0027] 1. Mixing tank;

[0028] 11. First water inlet;

[0029] 12. Second water inlet;

[0030] 13. First water outlet;

[0031] 14. Box body;

[0032] 15. Partition;

[0033] 101. First box;

[0034] 102. First solenoid valve;

[0035] 103. Second box;

[0036] 104. Third water inlet;

[0037] 105. Fourth water inlet;

[0038] 106. Second outlet;

[0039] 107. Second solenoid valve;

[0040] 2. Wastewater pipelines;

[0041] 21. Check valve;

[0042] 3. Water supply pipes;

[0043] 4. Household water purifier;

[0044] 41. Wastewater outlet;

[0045] 42. Water inlet;

[0046] 43. Pure water outlet;

[0047] 5. Outer casing; and

[0048] 6. Water quality sensor. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0050] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of embodiments of this disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure.

[0051] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0052] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). Similarly, when using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0053] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0054] Compared to commercial water purifiers, household water purifiers have unique characteristics. Taking a family of five as an example, each person drinks approximately 2 liters of water daily. Adding in water used for cooking and brewing tea, the total daily water consumption is about 15-20 liters (corresponding to 15-20 liters of wastewater). Water usage is mostly concentrated in three time slots: 7-9 am, 11 am-1 pm, and 5-9 pm. Household water purifiers include those with and without a pure water pressure tank. The former produces water in a concentrated period with a larger volume per cycle, for example, producing 3-5 times a day, each time producing 3-5 liters. The latter produces water more frequently but in smaller volumes, for example, 5-10 times a day, each time producing 0.2-3 liters.

[0055] Based on the aforementioned characteristics of household water purifiers, this application proposes a mixing tank installed between the wastewater inlet and inlet of the water purifier. This mixing tank is also connected to the tap water pipe. The wastewater produced by the water purifier is mixed with tap water in the mixing tank for initial dilution. During the water production intervals, impurities in the mixing tank slowly diffuse into the tap water pipe, which is connected to other household water facilities such as washing machines, toilets, washbasins, water heaters, and showers. Therefore, the tap water in the pipes can be replaced periodically, ensuring that the impurity content (TDS, or Total Dissolved Solids) in the tap water pipe remains essentially constant. In other words, the TDS value of the mixed water in the mixing tank gradually decreases to match that of the tap water during the water production intervals. This technical solution achieves "wastewater-free" water production in household water purifiers.

[0056] In this field, depending on the region and the quality of the local tap water pipeline, the TDS value of tap water is generally 200-250 mg / L. Pure water purified by a water purifier has a TDS value range of 0-50 mg / L and is considered direct drinking water, which is also commonly referred to as "pure water" in this field.

[0057] Figure 1 This is a three-dimensional structural schematic diagram of a circulating wastewater treatment apparatus according to an exemplary embodiment of the present disclosure. Figure 2 This is a block diagram illustrating the working principle of a circulating wastewater treatment device and a household water purifier according to exemplary embodiments of the present disclosure.

[0058] According to embodiments of this disclosure, a circulating wastewater treatment device suitable for household water purifiers is provided, such as... Figure 1 and Figure 2As shown, the system includes a wastewater pipe 2 and a mixing tank 1. One end of the wastewater pipe 2 is connected to the wastewater outlet 41 of the household water purifier 4, and a one-way valve 21 is installed on the wastewater pipe 2. The mixing tank 1 includes a tank body 14, which is provided with a first inlet 11, a second inlet 12, and a first outlet 13. The first inlet 11 is connected to the other end of the wastewater pipe 2 to receive wastewater flowing out of the wastewater pipe 2; the second inlet 12 is connected to a tap water pipe 3 to introduce tap water to initially dilute the wastewater in the tank body 14 and form a mixed water; the first outlet 13 is connected to the inlet 42 of the household water purifier 4. During the water production interval, the mixed water is continuously diluted by the tap water in the tap water pipe 3.

[0059] According to the above setup, since the impurity concentration of the wastewater (externally manifested as TDS value) is higher than that of the tap water, this concentration difference will drive the solute to diffuse from the high-concentration wastewater to the low-concentration tap water. Therefore, by setting up a mixing tank 1, which is connected to the wastewater pipe 2 and the tap water pipe 3 respectively connected to the wastewater outlet 41 of the household water purifier 4, a one-way valve 21 is installed on the wastewater pipe 2 to prevent wastewater backflow. The wastewater discharged from the household water purifier mixes and diffuses with the tap water inside the tank 14 to obtain a pre-diluted mixed water. Since the tap water volume is much higher than the wastewater volume, the resulting mixed water is similar in quality to the original tap water and does not affect the purification effect of the household water purifier. Therefore, the resulting mixed water can be supplied to the household water purifier for purification through the first outlet 13. Furthermore, during the interval between water production by the household water purifier 4, the mixed water inside the tank 14 will also diffuse with the tap water in the tap water pipe 3 to obtain continuous dilution. Impurities diffused into the tap water are gradually discharged through tap water pipe 3 and reused, reducing the concentration of impurities in the wastewater and allowing it to be reused.

[0060] In this embodiment, the wastewater generated by the water purifier is not discharged; only impurities in the wastewater diffuse into the tap water pipes and are discharged with other water-using devices. Essentially, it utilizes water from the tap water pipes to purify the wastewater from the water purifier. The purified wastewater can then re-enter the water purifier for secondary / multiple water purification. In related technologies, some types of water purifiers directly return the generated wastewater to the purifier for secondary water purification. The inlet of such purifiers is typically connected to the wastewater and tap water via two separate pipes, or via a T-junction.

[0061] The water purifiers in related technologies differ fundamentally from those provided in this application. The main difference lies in the fact that the wastewater produced by these purifiers is directly returned to the purifier after treatment, leading to a continuous increase in the TDS value of the wastewater. This puts significant pressure on the filter element, severely reducing its lifespan. Furthermore, some models periodically or after meeting preset conditions perform high-speed flushing of the filter element to reduce impurities adhering to it, thus extending its lifespan. However, this complicates the purifier process and increases equipment costs. Additionally, the high-concentration wastewater (e.g., TDS value greater than 1000 mg / L) produced by this type of purifier must be directly discharged (e.g., through a sewer pipe) and cannot be returned to the purifier for reuse. Therefore, the aforementioned types of water purifiers are not truly wastewater-free purifiers.

[0062] The two technical solutions described above will be further explained below with reference to two specific embodiments. The TDS value of tap water is 200 mg / L, the ratio of pure water to wastewater in the water purifier is 1:1, and the reverse osmosis membrane efficiency of the water purifier is 95% (only the reverse osmosis membrane filter element is considered here, and other filter elements, such as PP filter element, activated carbon filter element, etc., are ignored).

[0063] Example 1 is a technical solution in the prior art where wastewater is directly returned to the water purifier. The water purifier inlet receives 2L of tap water with a TDS value of 200mg / L, producing 1L of pure water with a TDS value of 20mg / L, and 1L of primary wastewater with a TDS value of 380mg / L. This 1L of primary wastewater and 1L of tap water are then fed into the purifier for further purification, producing 1L of pure water with a TDS value of 29mg / L, and 1L of secondary wastewater with a TDS value of 551mg / L. This 1L of secondary wastewater and 1L of tap water are then fed into the purifier for further purification, producing 1L of pure water with a TDS value of 37.55mg / L, and 1L of tertiary wastewater with a TDS value of 867.78mg / L. This 1L of tertiary wastewater and 1L of tap water are then fed into the purifier for further purification, producing 1L of pure water with a TDS value of 45.67-7.55mg / L, and 1L of quaternary wastewater with a TDS value of 1014.39mg / L. The wastewater from these four processes cannot be returned to the water purifier for further water production; it must be discharged (e.g., through the drain). If it continues to be used in water production, the TDS value of the resulting pure water will be 53.39 mg / L, exceeding 50 mg / L, which does not meet the standard for direct drinking.

[0064] Furthermore, as can be seen from the above process, as wastewater is repeatedly used in water production, the TDS value of the resulting pure water continuously increases, meaning that the quality of the pure water continuously decreases. Generally speaking, when the TDS value exceeds 40 mg / L, some people can perceive a decline in the taste and quality of the pure water.

[0065] Example 2: Using the technical solution of this application, 6L of pure water is produced each morning, noon, and evening, at 8:00 AM, 12:00 PM, and 6:00 PM respectively. The mixing tank has a volume of 10L. Taking water production at 8:00 AM as an example: 2L of mixed water from the mixing tank is input into the water purifier, with a TDS value of 200mg / L, resulting in 1L of pure water with a TDS value of 20mg / L, and 1L of primary wastewater with a TDS value of 380mg / L; 1L of wastewater flows into the mixing tank, and simultaneously, 1L of tap water is added to the mixing tank. Here, the difference in impurity concentration distribution within the mixing tank is temporarily ignored, and it is assumed that the mixture is completely mixed and the TDS value is consistent in all areas, so the TDS value in the mixing tank becomes 218mg / L; 2L of mixed water from the mixing tank is input into the water purifier, with a TDS value of 218mg / L, resulting in... 1L of pure water has a TDS value of 21.8 mg / L, and 1L of secondary wastewater has a TDS value of 414.2 mg / L. The TDS value in the mixing tank is reduced to 235.8 mg / L; ...; ... 1L of pure water with a TDS value of 28.8 mg / L and 1L of sixth-stage wastewater have a TDS value of 547.6 mg / L. The TDS value in the mixing tank is reduced to 305.3 mg / L. Thus, a total of 6L of pure water is produced, with an average TDS value of 24 mg / L. The TDS value of the mixed water in the mixing tank increases from 200 mg / L to 305.3 mg / L. After a second dilution over 4 hours between 8 am and 12 pm, the TDS value of the mixed water in the mixing tank drops back to 200 mg / L. The water production process and results at noon and in the evening are similar to those in the morning, and will not be described in detail here.

[0066] In this embodiment, the TDS distribution in the mixing tank is not uniform during the water production process. The distance between the second inlet 12 and the first outlet 13 is less than the distance between the first inlet 11 and the first outlet 13. As a result, the TDS value is lower at the end of the mixing tank near the first outlet 13 and higher at the end near the first inlet 11. Therefore, the average TDS value of the circulating wastewater treatment device provided in this embodiment is necessarily less than 24 mg / L when continuously producing 6L of water.

[0067] As can be seen from the above embodiments one and two, the circulating wastewater treatment device proposed in this application, combined with a common reverse osmosis water purifier, can achieve truly wastewater-free water production, and the produced pure water has a relatively high quality. In an illustrative embodiment, such as... Figure 1 , Figure 2 As shown, the tap water mixed with diluted water in the tap water pipe 3 can be used through non-potable water taps or water-using devices, such as toilets and shower heads. This allows the wastewater discharged from the household water purifier 4 to slowly mix with the tap water for reuse.

[0068] Figure 3This is a schematic diagram illustrating the connection relationship between another circulating wastewater treatment device and a household water purifier according to an exemplary embodiment of the present disclosure. Figure 4 yes Figure 3 The diagram shows the working principle of a circulating wastewater treatment device and a household water purifier.

[0069] In one illustrative alternative embodiment, the mixing tank 1 includes a first tank 101, a second tank 103, and a valve assembly. The first tank 101 includes: a first inlet 11 connected to the other end of the wastewater pipe 2 for receiving wastewater flowing from the wastewater pipe 2; a second inlet 12 connected to the tap water pipe 3; and a first outlet 13 connected to the inlet 42 of the household water purifier 4. The second tank 103 includes: a third inlet 104 connected to the other end of the wastewater pipe 2 for receiving wastewater flowing from the wastewater pipe 2; a fourth inlet 105 connected to the tap water pipe 3; and a second outlet 106 connected to the inlet 42 of the household water purifier 4. A valve assembly is disposed on the wastewater pipe, configured to periodically connect one of the first and second tanks and close the other.

[0070] In one optional illustrative embodiment, the valve assembly includes a three-way switching valve configured to periodically select one of the channels to open. For example, the interval may be 10 min, 15 min, 20 min, 25 min, or 30 min.

[0071] In one optional illustrative embodiment, such as Figure 3 , Figure 4 As shown, the valve assembly includes a first solenoid valve 102 and a second solenoid valve 107. The first solenoid valve 102 is disposed between the wastewater pipeline 2 and the first inlet 11, and the second solenoid valve 107 is disposed between the wastewater pipeline 2 and the third inlet 104. The first solenoid valve 102 and the second solenoid valve 107 are configured to alternately open one solenoid valve and close the other solenoid valve. Optionally, the interval between alternating openings may be 10 min, 15 min, 20 min, 25 min, or 30 min.

[0072] According to the above configuration, a first chamber 101 and a second chamber 103 are set up, controlled by two solenoid valves respectively. The first solenoid valve 102 and the second solenoid valve 107 are configured to alternately open one solenoid valve and close the other. This allows the wastewater discharged from the household water purifier 4 to alternately enter the first chamber 101 and the second chamber 103, making the wastewater discharge more dispersed, lowering the TDS value of the mixed water inside the chambers, and increasing the time interval between wastewater discharges into the same chamber. The diffusion time of the mixed water inside the chambers into the tap water pipe 3 is also correspondingly increased, further lowering the TDS value of the mixed water, increasing the speed at which the wastewater is diluted and utilized, and reducing the filtration burden on the household water purifier 4.

[0073] In this embodiment, one end of each of the two mixing tanks is connected to the wastewater outlet of the household water purifier, while the other end is always connected to the tap water pipe. During the water production process, after the first tank 101 has received wastewater for a predetermined period, its wastewater inlet pipe closes, while the wastewater inlet pipe of the second tank 103 opens, allowing the second tank 103 to continue receiving wastewater. Throughout the entire water production process, both the first tank 101 and the second tank 103 are connected to the tap water pipe, and tap water is fed into the household water purifier independently or jointly after passing through the first tank 101 and the second tank 103.

[0074] During the water production process, when the first tank 101 is connected to the wastewater pipe 2 and the second tank 103 is disconnected from the wastewater pipe 2, the TDS in the first tank 101 rises. When the first tank 101 is disconnected from the wastewater pipe 2 and the second tank 103 is connected to the wastewater pipe 2, the TDS value in the first tank 101 reaches its peak value and then gradually decreases to its initial state (i.e., the TDS value is the same as that of tap water). The change in TDS value in the second tank 103 is similar to that in the first tank 101, and will not be described in detail here.

[0075] Based on the above structure and working principle, a household water purifier can continuously produce water without wastewater discharge, making it suitable for users with large water production volumes. In one illustrative embodiment, the first solenoid valve 102 and the second solenoid valve 107 can be any one of a direct-acting solenoid valve, a proportional solenoid valve, and a pulse solenoid valve.

[0076] In one illustrative embodiment, the distance between the second inlet 12 and the first outlet 13 is less than the distance between the first inlet 11 and the first outlet 13.

[0077] Based on the above arrangement, when two liquids of different concentrations are mixed, due to the concentration gradient, molecules diffuse from the high-concentration area to the low-concentration area. This process is gradual, therefore, the TDS value of the mixed water near the tap water inlet (i.e., the second inlet 12) is lower than that of the mixed water near the wastewater inlet (i.e., the first inlet). Therefore, placing the first outlet 13 closer to the second inlet 12 allows for the supply of mixed water with a lower TDS value to the household water purifier 4 for purification, improving the purification effect. Simultaneously, less wastewater is discharged, achieving a wastewater recycling effect.

[0078] Figure 5 This is a three-dimensional structural cross-sectional view of a mixing tank body with multiple partitions spaced apart according to an exemplary embodiment of the present disclosure.

[0079] In one illustrative embodiment, the mixing tank 1 further includes a partition 15, which is disposed on the inner side wall of the tank body 14. The partition 15 is adapted to form a channel within the tank body 14 for the flow of the mixed water. A first inlet 11 and a first outlet 13 are respectively disposed at both ends of the channel.

[0080] In one illustrative embodiment, such as Figure 5 As shown, there are multiple partitions 15, which are staggered and spaced apart inside the housing 14 to divide the space inside the housing 14 into multiple S-shaped water channels. The first water inlet 11 and the first water outlet 13 are located at the two ends of the S-shaped water channel, respectively, and the second water inlet 12 is arranged adjacent to the first water outlet 13.

[0081] According to the above configuration, the staggered arrangement of multiple baffles reduces the contact area between wastewater and tap water, slowing down the diffusion rate of wastewater to tap water and resulting in a lower TDS value for the mixed water near the first outlet 13. The formed S-shaped water path increases the distance between the first inlet 11 and the first outlet 13 at both ends of the S-shaped water path, further slowing the diffusion rate of wastewater to tap water and further reducing the TDS value of the mixed water near the first outlet 13. This avoids affecting the purification effect of the household water purifier 4, ensuring the quality of the purified water. It also reduces the TDS value of the diffused tap water in the tap water pipe 3, ensuring that it does not affect the use of other water outlets.

[0082] Figure 6 This is a three-dimensional structural cross-sectional view of a mixing tank body with a spiral baffle according to an exemplary embodiment of the present disclosure.

[0083] In an alternative illustrative embodiment, such as Figure 6 As shown, the partition 15 is a spiral plate, which divides the space inside the box 14 into a spiral water channel. The first water inlet 11 and the first water outlet 13 are located at the two ends of the spiral water channel, respectively, and the second water inlet 12 is arranged adjacent to the first water outlet 13.

[0084] In one illustrative embodiment, the circulating wastewater treatment device also includes a water quality sensor 6, suitable for detecting the water quality inside the circulating wastewater treatment device.

[0085] Figure 7 This is a schematic diagram of various housings of a circulating wastewater treatment device according to exemplary embodiments of the present disclosure and their connection relationship with a household water purifier.

[0086] In one illustrative embodiment, such as Figure 7As shown, the circulating wastewater treatment device also includes a housing 5 for accommodating the mixing tank 1, and a connecting assembly disposed on the housing 5. The connecting assembly is adapted to fix the housing 5 to the housing of the household water purifier 4.

[0087] In one illustrative embodiment, such as Figure 7 As shown in (a), the outer casing 5 has a flat, box-like structure and is suitable for attaching to the side or bottom of the household water purifier 4. Alternatively, the outer casing 5 can also be a cylindrical, box-like structure.

[0088] In an alternative illustrative embodiment, such as Figure 7 As shown in (b), the top or side surface of the outer casing 5 is recessed inward to form a slot, the shape of which is adapted to the shape of the household water purifier 4 so as to store the household water purifier in the slot.

[0089] In an alternative illustrative embodiment, such as Figure 7 As shown in (c), the outer casing 5 is an L-shaped box, and the outer casing is attached to the side and bottom of the household water purifier 4.

[0090] According to the above configuration, the outer casing 5 of the circulating wastewater treatment device is connected to the casing of the household water purifier 4, which can save space.

[0091] Figure 8 This is a block diagram illustrating the effect testing principle of a circulating wastewater treatment device according to an exemplary embodiment of the present disclosure.

[0092] The following is a specific embodiment and... Figure 8 The water purification effect of the circulating wastewater treatment device provided in this application was tested.

[0093] Example 3

[0094] like Figure 2 and Figure 8 As shown, the household water purifier 4 is a common type of water purifier on the market, including PP filter cartridges, activated carbon filter cartridges, and RO reverse osmosis membrane filter cartridges. It may also include ultrafiltration membrane and nanofiltration membrane filter cartridges, as well as post-activated carbon filter cartridges. Multiple water quality sensors 6 are respectively installed inside the mixing tank 1 body 14 and between the first outlet 13 of the mixing tank 1 and the inlet 42 of the household water purifier 4. They are used to test the TDS value of the mixed water in the mixing tank 1, the TDS value of the water purifier inlet, and the TDS value of the pure water outlet of the water purifier. The household water purifier 4 is connected to the mixing tank 1 by a two-point pipe, and the mixing tank 1 is connected to the tap water pipe by a four-point pipe. The TDS value of the tap water is 219 mg / L. The continuous water production time is 10:00 to 12:10, and the interval time is 12:10 to 14:00. For details, please refer to Table 1.

[0095] Table 1

[0096]

[0097]

[0098] Table 1 shows the TDS values ​​of the mixed water at the inlet 42, the mixed water in the mixing tank 1, and the purified water at the purified water outlet 43 during the 2-hour water production and 2-hour working interval of the household water purifier 4. When the household water purifier 4 starts producing water, it continuously generates wastewater, causing the TDS values ​​of the mixed water at the inlet 42, the mixed water in the mixing tank 1, and the purified water at the purified water outlet 43 to gradually increase. Because the first outlet 13 is located close to the second inlet 12, the wastewater is diluted by tap water, and the TDS value of the mixed water at the inlet 42 is lower than that of the mixed water in the mixing tank 1. During the water production interval of the household water purifier 4, the mixed water continuously diffuses into the tap water in the tap water pipe 3, continuously diluting it. The TDS value of the mixed water inside the mixing tank 1 begins to decrease continuously. Furthermore, because the mixed water at the inlet end is inside the pipe (the mixed water remaining in the two-point pipe), and the pipe diameter is smaller than that of the tap water pipe 3, the diffusion is slower, and the TDS value decreases more slowly than that inside the mixing tank 1.

[0099] In this embodiment, the actual effect test of the circulating wastewater treatment device is conducted. Compared with the theoretical calculation in Embodiment 2, which only considers the reverse osmosis membrane filter and ignores other filter elements, in this test, the other filter elements in the household water purifier 4 also play a role. Therefore, it can be seen that the TDS value of the pure water outlet of the water purifier is basically controlled within 10mg / L, and high-quality pure water can be produced.

[0100] In one optional illustrative embodiment, for the convenience of testing, the circulating wastewater treatment device also includes outlet valves. Multiple outlet valves are respectively installed on the outside of the mixing tank 1 body 14 and between the first outlet 13 of the mixing tank 1 and the inlet 42 of the household water purifier 4 to sample the mixed water inside. The outlet valves are, for example, faucets.

[0101] According to the above setup, the water quality of the mixed water inside the mixing tank 1 and the mixed water input to the household water purifier 4 can be sampled periodically through the water outlet valve, and the water quality of the sampled water can be measured.

[0102] In one illustrative embodiment, the mixing tank 1 has a volume of 5 to 10 L.

[0103] Based on the above setup, assuming a household's daily total water consumption is approximately 15-20L (corresponding to approximately 15-20L of wastewater), the mixing tank 1 should have a capacity of 5-10L, for example, 5L, 6L, 7L, 8L, and 9L. This capacity is sufficient to hold wastewater during daily use without taking up excessive space. Specifically, for household water purifiers with and without a pure water pressure tank, the former generally has a slightly larger mixing tank volume than the latter.

[0104] In an alternative illustrative embodiment, the volume of the mixing tank 1 can also be 3 to 6L, for example, 3L, 4L, 5L and 6L, which is suitable for customers with low water consumption, such as single-person households with daily water consumption of 3 to 5L. A smaller mixing tank takes up less space.

[0105] According to another aspect of the embodiments of this disclosure, a household water purifier is provided, such as... Figures 1-8 As shown, the device includes a water purification component and a circulating wastewater treatment device as described in any of the above embodiments. The water purification component includes an inlet 42 and a wastewater outlet 41. The wastewater pipeline 2 of the circulating wastewater treatment device is connected to the wastewater outlet 41, and the first outlet 13 of the mixing tank 1 of the circulating wastewater treatment device is connected to the inlet 41. The mixing tank 1 is disposed on the side and / or bottom of the water purification component.

[0106] According to the above setup, the wastewater discharged from the water purification unit flows through the wastewater pipe into the mixing tank 1, where it mixes and dilutes with tap water inside the tank 14 to obtain mixed water. This mixed water can be used to supply the household water purifier 4 for further purification and filtration. Simultaneously, the mixed water continues to diffuse and dilute with the tap water in the tap water pipe 3, and is then discharged for use through other outlets. The wastewater generated by the household water purifier 4 is recycled and reused, which does not affect the purification and filtration effect of the household water purifier, thus improving the utilization rate of water resources.

[0107] In one optional illustrative embodiment, the circulating wastewater treatment device further includes a display mounted on the housing, which is used to display the TDS value of the mixed water in the mixing tank in real time, so that the user can observe whether it is suitable for continuous water production.

[0108] In one optional illustrative embodiment, the circulating wastewater treatment device further includes one or more indicator lights to display the current status of the mixing tank. For example, a TDS value of 200–400 mg / L in the mixing tank indicates a first state, signifying continuous water production; a TDS value of 400–600 mg / L indicates a second state, signifying continuous water production, but with a slight decrease in water quality; and a TDS value of 200–400 mg / L indicates a third state, suggesting a recommended suspension of water production while waiting for the mixed water in the mixing tank to be diluted and purified by tap water from the tap water pipes. Optionally, the first, second, and third states can be represented by the color, number, and flashing pattern of the indicator lights.

[0109] As a further option, the circulating wastewater treatment device also includes an alarm that issues different warning messages for the first, second and third states.

[0110] The embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and have not been described in detail. Furthermore, the definitions of the various components described above are not limited to the specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0111] It should also be noted that, in the specific embodiments of this disclosure, unless otherwise stated otherwise, the numerical parameters in this specification and the appended claims are approximate values ​​and can be changed according to the desired characteristics obtained from the content of this disclosure. Specifically, all numbers used in the specification and claims to indicate dimensions, range conditions, etc., of the composition should be understood to be modified by the term "about" in all cases. Generally, this means that there may be variations of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments.

[0112] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0113] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of this disclosure. It should be understood that the above descriptions are merely specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A circulating wastewater treatment device, suitable for household water purifiers, characterized in that, include: Wastewater pipe (2), one end of which is adapted to connect to the wastewater outlet (41) of the household water purifier (4), and a one-way valve (21) is provided on the wastewater pipe (2); and The mixing tank (1) includes a tank body (14), on which the following are provided: The first inlet (11) is connected to the other end of the wastewater pipeline (2) to receive the wastewater flowing out of the wastewater pipeline (2); The second inlet (12) is connected to the tap water pipe (3) and is used to introduce tap water to initially dilute the wastewater in the tank (14) and form mixed water; and The first water outlet (13) is connected to the water inlet (42) of the household water purifier (4); During the water production interval, the mixed water is continuously diluted by the tap water in the tap water pipeline (3); The mixing tank (1) also includes: A partition (15) is provided on the inner side wall of the tank (14), the partition (15) being adapted to form a channel for the flow of the mixed water within the tank (14); The first inlet (11) and the first outlet (13) are respectively located at both ends of the channel; The partition (15) is a spiral plate, which divides the space inside the box (14) into a spiral water channel. The first water inlet (11) and the first water outlet (13) are located at the two ends of the spiral water channel, respectively, and the second water inlet (12) is arranged adjacent to the first water outlet (13).

2. The circulating wastewater treatment device according to claim 1, characterized in that, The mixing tank includes: The first housing (101) includes: The first inlet (11) is connected to the other end of the wastewater pipeline (2) to receive the wastewater flowing out of the wastewater pipeline (2); The second water inlet (12) is connected to the tap water pipeline (3); and The first water outlet (13) is connected to the water inlet (42) of the household water purifier (4); The second housing (103) includes: The third inlet (104) is connected to the other end of the wastewater pipeline (2) to receive the wastewater flowing out of the wastewater pipeline (2); The fourth water inlet (105) is connected to the tap water pipeline (3); and The second water outlet (106) is connected to the water inlet (42) of the household water purifier (4); A valve assembly is provided on the wastewater pipeline (2), the valve assembly being configured to connect one of the first housing (101) and the second housing (103) at intervals and to close the other.

3. The circulating wastewater treatment device according to claim 1, characterized in that, The distance between the second inlet (12) and the first outlet (13) is less than the distance between the first inlet (11) and the first outlet (13).

4. The circulating wastewater treatment device according to any one of claims 1 to 3, characterized in that, Also includes: The outer casing (5) is used to house the mixing tank (1); as well as A connecting component is disposed on the housing (5), the connecting component being adapted to fix the housing (5) to the housing of the household water purifier (4).

5. The circulating wastewater treatment device according to claim 4, characterized in that, The outer casing (5) is a flat or cylindrical box-shaped structure, and the outer casing (5) is suitable for attaching to the side or bottom surface of the household water purifier (4); or The top or side surface of the outer casing (5) is recessed inward to form a slot, the shape of which is adapted to the shape of the household water purifier (4) so ​​as to accommodate the household water purifier (4) in the slot; or The outer casing (5) is an L-shaped box, and the outer casing (5) is respectively attached to the side and bottom of the household water purifier (4).

6. The circulating wastewater treatment device according to claim 1, characterized in that, The volume of the mixing tank (1) is 5~10L.

7. A household wastewater-free water purifier, characterized in that, include: The water purification component includes an inlet (42) and a wastewater outlet (41). as well as The circulating wastewater treatment device according to any one of claims 1 to 6, wherein the wastewater pipeline (2) of the circulating wastewater treatment device is connected to the wastewater outlet (41), and the first outlet (13) of the mixing tank (1) of the circulating wastewater treatment device is connected to the inlet (42). The mixing tank (1) is located on the side and / or bottom of the water purification assembly.

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