Water purifying device
By integrating reverse osmosis, ultrafiltration, and mixing water circuits, the water purification device solves the problem of limited functionality in existing equipment, enabling the supply of direct drinking water with multiple purification levels to meet users' diverse water needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN ECO WATER SYST CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-07-07
AI Technical Summary
Existing water purification equipment cannot provide drinking water with different levels of purification, resulting in limited functionality and an inability to meet users' diverse water needs.
Design a water purification device that integrates reverse osmosis water path, ultrafiltration water path and mixing water path. Through the combination of composite filter element and multiple sensors and pumps, it realizes the switching of direct drinking water mode between RO pure water, UF ultrafiltration water and TDS adjustable mixed water to meet the water needs of different purification levels.
While saving costs, it can provide RO pure water, UF ultrafiltration water and TDS adjustable mixed water to meet users' various water needs and achieve direct drinking water supply with various purification levels.
Smart Images
Figure CN224467599U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water purification technology, and in particular to a water purification device. Background Technology
[0002] In recent years, drinking water health has become an increasingly important concern. Tap water contains various bacteria and impurities, and most tap water needs to be filtered using a water purifier before boiling and drinking. For example, ultrafiltration or RO reverse osmosis equipment can be used for water purification.
[0003] As living standards improve, people's requirements for water quality are becoming more diverse. They not only want sufficiently clean water, but also water with different levels of purification. For example, there are different requirements for water quality when brewing tea and coffee. The requirements for water quality for brewing tea are relatively high, and a quantitative indicator can be that the TDS value of the water is less than 60.
[0004] To meet the growing demands of users, it is often necessary to install multiple types of water purification equipment to provide water with varying degrees of purity, which increases operating costs. Therefore, existing equipment is relatively limited in function and cannot provide devices with multiple water output types. Utility Model Content
[0005] The main purpose of this invention is to provide a water purification device to solve the problem that existing water purification equipment cannot provide drinking water with different levels of purification.
[0006] According to an embodiment of this utility model, a water purification device is provided, comprising: a reverse osmosis water path, including a pre-filter, a reverse osmosis filter, and a reverse osmosis water path assembly; and an ultrafiltration water path, including an ultrafiltration filter and an ultrafiltration water path assembly; wherein the water purification device further includes a post-filter, and the outlet of the reverse osmosis water path is connected to the outlet of the ultrafiltration water path and then connected to the post-filter; wherein the water purification device includes at least three modes: a first mode in which no water is discharged from the ultrafiltration water path and water is discharged from the reverse osmosis drinking water path; a second mode in which no water is discharged from the reverse osmosis water path and water is discharged from the ultrafiltration water path; and a third mode in which water is discharged from both the reverse osmosis drinking water path and the ultrafiltration drinking water path.
[0007] The pre-filter and the post-filter are combined to form a composite filter.
[0008] The water purification device further includes an inlet water path, which is located upstream of the reverse osmosis water path and the ultrafiltration water path, and the inlet water path includes an inlet and a first TDS sensor.
[0009] The reverse osmosis water circuit assembly includes: a booster pump located upstream of the reverse osmosis filter element, and a second TDS sensor and a first flow meter located downstream of the reverse osmosis filter element.
[0010] The booster pump regulates the flow rate of the water exiting the reverse osmosis filter element.
[0011] The ultrafiltration water circuit assembly includes a flow control pump and a second flow meter located downstream of the ultrafiltration filter element.
[0012] The flow control pump regulates the flow rate of the water emanating from the ultrafiltration filter element.
[0013] A third TDS sensor is also connected downstream of the post-filter.
[0014] The water purification device further includes a pure water return path, which returns the pure water from the outlet of the reverse osmosis filtration unit to the inlet of the pre-filter.
[0015] The water purification device further includes an ultrafiltration flushing water path, which is directly connected to one of the outlets of the ultrafiltration filter element.
[0016] The water purification device according to this utility model includes a reverse osmosis water circuit and an ultrafiltration water circuit, which can provide RO pure water for direct drinking, UF direct drinking water and TDS adjustable mixed direct drinking water, while saving costs and meeting the various water needs of customers. Attached Figure Description
[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram of a water purification device according to an embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram of a water purification device according to another embodiment of the present invention. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] Although this utility model specification may include various different embodiments, it should be understood that, with regard to some preferred embodiments described in detail in the specification and shown in the accompanying drawings, the contents disclosed in this utility model specification should be regarded as illustrative of the principles of this utility model, and the embodiments shown are not intended to limit the scope of protection of this utility model.
[0022] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0023] According to an embodiment of the present invention, a water purification device is provided, which can provide at least three types of direct drinking water with different TDS values: RO pure water, UF ultrafiltration water, and mixed water with adjustable TDS.
[0024] refer to Figure 1 The water purification device includes at least an inlet water path, a reverse osmosis (RO) water path, an ultrafiltration (UF) water path, and a mixing water path. The inlet water path may include an inlet 11 and a first TDS (Total Dissolved Solids) sensor 12. The inlet water path is connected to both the RO and UF water paths. The inlet 11 can be connected to a municipal water supply pipe, and the first TDS sensor 12 is used to detect the TDS value of the tap water entering the purification device. After entering the device, the tap water is divided into two paths: one enters the RO water path, and the other enters the UF water path.
[0025] The RO water circuit is used to provide directly drinkable RO pure water, and it may include a connected composite filter element 21, a reverse osmosis filter element (RO filter element) 22, and a reverse osmosis water circuit assembly. The reverse osmosis water circuit assembly may include: a first solenoid valve 23 and a booster pump 24 located upstream of the RO filter element 22, and a second TDS sensor 25, a first flow meter 26, and a one-way valve 27 located downstream of the RO filter element 22. The solenoid valve 23 is used to open and close the water circuit. The booster pump 24 may be a booster pump with an adjustable duty cycle; by adjusting the duty cycle of the booster pump 24, the water flow rate entering the RO filter element 22 can be adjusted, thereby achieving the purpose of adjusting the flow rate of the RO water outlet. The TDS sensor 25 is used to detect the TDS value of the water filtered by the RO filter element 22. It should be noted that... Figure 1 In this design, the pre-filter and post-filter are combined into a single composite filter, meaning that a single composite filter performs the functions of both pre-filters and post-filters. This results in higher integration of the device and a smaller footprint. Specifically, the RO water circuit includes the pre-filter portion of the composite filter 21.
[0026] The UF water circuit is used to provide directly drinkable UF water, and it may include an ultrafiltration filter cartridge (UF ultrafiltration filter cartridge) 31 connected to it and an ultrafiltration water circuit assembly. The ultrafiltration water circuit assembly includes a pressure regulating valve 32, a flow control pump 33, a second flow meter 34, and a second check valve 35 located downstream of the UF ultrafiltration filter cartridge 31. The flow control pump 33 is used to control the flow rate of the RO water outlet. In this embodiment, both the RO water circuit and the UF water circuit need to pass through the post-filter section of the composite filter cartridge 21; that is, both the RO water circuit and the UF water circuit include the post-filter section of the composite filter cartridge 21.
[0027] The mixing water path includes an RO water path, an UF water path, and a mixing water path assembly. The mixing water path assembly may include the post-filter portion of the composite filter cartridge 21 and a TDS sensor 13. Water filtered through the RO water path and / or UF water path re-enters the composite filter cartridge 21, where the post-filter portion of the composite filter cartridge 21 is used. After filtration by the post-filter, the water is directly delivered to the drinking water outlet for direct use. The above embodiment enables three direct drinking water modes that can be switched between to provide RO pure drinking water, UF ultrafiltration drinking water, or TDS-adjustable mixed drinking water, which will be described in detail below.
[0028] When providing RO pure drinking water (with the flow control pump 33 in the UF water circuit not operating), the RO water circuit route is as follows: inlet 11, TDS probe 12, composite filter 21 (pre-filter section), inlet solenoid valve 23, booster pump 24, RO filter 22, TDS probe 25, flow meter 26, check valve 27, composite filter 21 (post-filter section), and drinking water outlet 15. The RO water circuit outputs through booster pump 24, and the flow rate of the RO drinking water is adjusted between 0.4 and 3.3 L / min by controlling the duty cycle of the booster pump's PWM signal.
[0029] When providing UF direct drinking water (with the solenoid valve 23 and booster pump 24 of the RO water circuit not operating), the UF water circuit route is as follows: inlet 11, TDS probe 12, UF ultrafiltration filter element 31, pressure regulating valve 32, flow control pump 33, flow meter 34, check valve 35, composite filter element 21 (post-filter part), and direct drinking water outlet 15. The UF direct drinking water circuit outputs through the flow control pump, and the flow rate of the UF direct drinking water is adjusted between 0.3 and 2.9 L / min by controlling the duty cycle of the PWM signal of the flow control pump.
[0030] When providing TDS-adjustable mixed drinking water (with the RO water circuit solenoid valve 23, booster pump 24, and UF water circuit flow control pump 33 operating simultaneously), the mixing water path is as follows: the RO and UF water circuits mix after check valves 27 and 35, then pass through composite filter 21 (post-filter section), TDS probe 13, and finally the drinking water outlet 15. Since the TDS value of RO pure drinking water is low and the TDS value of UF drinking water is high, adjusting the flow rate of these two types of water with different TDS values and mixing them can produce mixed drinking water with controllable TDS values.
[0031] exist Figure 1 In the illustrated embodiment, the pre-filter and post-filter are combined into a composite filter. For a clearer understanding of the water flow path in this application, please refer to the following... Figure 2 The pre-filter and post-filter are represented separately.
[0032] When providing RO pure drinking water (the flow control pump 33 of the UF water circuit is not working), the RO water circuit includes, in sequence: inlet 11, TDS probe 12, pre-filter 211, inlet solenoid valve 23, booster pump 24, RO filter 22, TDS probe 25, flow meter 26, check valve 27, post-filter 212, and drinking water outlet 15.
[0033] When UF direct drinking water is provided (the solenoid valve 23 and booster pump 24 of the RO water circuit are not working), the UF water circuit includes the following components in sequence: inlet 11, TDS probe 12, UF ultrafiltration filter element 31, pressure regulator 32, flow control pump 33, flow meter 34, check valve 35, post-filter element 212, and direct drinking water outlet 15.
[0034] When providing TDS-adjustable mixed drinking water (RO water circuit solenoid valve 23, booster pump 24, and UF water circuit flow control pump 33 are working simultaneously), the mixed water circuit includes: the part of the RO water circuit before the check valve 27 and the part of the UF water circuit before the check valve 35, the post-filter 212, the TDS probe 13, and the drinking water outlet 15.
[0035] The above embodiments of this application can provide TDS-controlled mixed drinking water, and the TDS value after mixing can be expressed by formula (1):
[0036] TDS Mix =(TDS) RO *Flow RO +TDS UF *Flow UF ) / (Flow RO +Flow UF )
[0037] Formula (1)
[0038] Among them, TDS RO This indicates the TDS value of drinking water after passing through the RO filter. Flow RO TDS indicates the water flow rate after passing through the RO filter. UF This indicates the TDS value of drinking water after passing through the UF ultrafiltration filter cartridge. Flow UF This indicates the water flow rate after passing through the UF ultrafiltration filter cartridge.
[0039] The total flow rate (outflow rate) of the direct drinking water faucet after mixing is 3L / min, that is...
[0040] Flow RO + Flow UF = 3 L / min Formula (2)
[0041] Data was sampled from TDS sensor 12 to obtain TDS UF (Same as the raw water TDS), data was sampled from TDS sensor 25 to obtain TDS. RO :
[0042] TDS raw water = TDS UF =200
[0043] TDS RO =4
[0044] Set TDS Mix The value is 150, which is obtained from formulas (1) and (2):
[0045] 150 = (4 * Flow) RO +200*Flow UF ) / (Flow RO +Flow UF )
[0046] Flow RO +Flow UF =3
[0047] The calculation shows that:
[0048] Flow RO =0.8
[0049] Flow UF =2.2
[0050] The flow rate of UF ultrafiltration direct drinking water is maintained at 2.2L / min by adjusting the flow control pump using PWM.
[0051] The booster pump is adjusted using PWM to maintain the flow rate of RO drinking water at 0.8L / min.
[0052] The TDS sensor 13 detected a mixed water value of 147.7, which is close to TDS 150.
[0053] Through the above embodiments, by controlling the flow rate of UF ultrafiltration drinking water and RO drinking water, drinking water with adjustable TDS can be obtained to meet different customer TDS water quality requirements. For example, it can meet customer requirements such as: RO pure water TDS: 4~25, coffee water TDS: 150+ / -10, tea brewing water TDS: <60, etc.
[0054] In addition to the three direct drinking water circuits mentioned above, the device of this application also includes an ultrafiltration rinsing water circuit, which includes an UF ultrafiltration rinsing outlet 36. The water rinsed by the UF ultrafiltration filter element 31 flows directly out of the ultrafiltration outlet 36 and can be used for non-potable water (e.g., washing dishes).
[0055] Continue to refer to Figure 1 and Figure 2 The filtration system 10 may also include a pure water return path, which includes a solenoid valve 28 and a check valve 29, used to return the water flowing out of the RO filter element 22 to the inlet of the pre-filter element 211. When the TDS concentration before the RO membrane is high, the solenoid valve 28 is opened to allow the pure water after the RO membrane to return to the front of the RO membrane, thus solving the problem of excessively high TDS concentration. In addition, the RO filter element 22 also includes a wastewater outlet, and the wastewater (or concentrated water) discharged from it is discharged from the wastewater outlet 42 through the solenoid valve 41.
[0056] In summary, the water purification device according to this utility model integrates reverse osmosis water path, ultrafiltration water path and mixing water path, and can provide RO pure water direct drinking water, UF ultrafiltration direct drinking water and TDS adjustable mixing water direct drinking water, which saves costs while meeting the various water needs of customers.
[0057] Although this disclosure has been described in detail with reference to specific embodiments thereof, those skilled in the art will understand that various changes and modifications may be made therein without departing from the spirit and scope of the embodiments. Therefore, this application is intended to cover modifications and variations thereof, and any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be included within the scope of the claims of this application and their equivalents.
[0058] Furthermore, features disclosed in the foregoing description, claims, or drawings, expressed in their specific form or according to the manner of performing the disclosed function or the method or process for obtaining the disclosed result, may, as appropriate, be used alone or in any combination of these features to implement this application in their different forms. Specifically, one or more features of any embodiment described in this application may be combined with one or more features of any other embodiment described in this application.
[0059] Protection may also be sought for any feature disclosed in any one or more publications cited in or combined by reference in this application.
Claims
1. A water purification device, characterized in that, include: The reverse osmosis water circuit includes a pre-filter, a reverse osmosis filter, and reverse osmosis water circuit components. The ultrafiltration water circuit includes an ultrafiltration filter element and an ultrafiltration water circuit assembly. The water purification device also includes a post-filter cartridge, and the outlet of the reverse osmosis water path is connected to the outlet of the ultrafiltration water path and then connected to the post-filter cartridge. The water purification device includes at least three modes: In the first mode, no water is discharged from the ultrafiltration water path, but water is discharged from the reverse osmosis water path. In the second mode, no water is discharged from the reverse osmosis water path, but water is discharged from the ultrafiltration water path. In the third mode, the reverse osmosis water path and the ultrafiltration water path output water separately.
2. The water purification device according to claim 1, characterized in that, The pre-filter and the post-filter are combined to form a composite filter.
3. The water purification device according to claim 1 or 2, characterized in that, Also includes: The inlet water path is located upstream of the reverse osmosis water path and the ultrafiltration water path, and the inlet water path includes an inlet and a first TDS sensor.
4. The water purification device according to claim 3, characterized in that, The reverse osmosis water circuit assembly includes: a booster pump located upstream of the reverse osmosis filter element, and a second TDS sensor and a first flow meter located downstream of the reverse osmosis filter element.
5. The water purification device according to claim 4, characterized in that, The booster pump regulates the flow rate of the water exiting the reverse osmosis filter element.
6. The water purification device according to claim 3, characterized in that, The ultrafiltration water circuit assembly includes: a flow control pump and a second flow meter located downstream of the ultrafiltration filter element.
7. The water purification device according to claim 6, characterized in that, The flow control pump regulates the flow rate of the water exiting the ultrafiltration filter element.
8. The water purification device according to claim 3, characterized in that, A third TDS sensor is also connected downstream of the post-filter.
9. The water purification device according to claim 3, characterized in that, Also includes: A pure water return path is provided, in which pure water from the outlet of the reverse osmosis filter element is returned to the inlet of the pre-filter element.
10. The water purification device according to claim 3, characterized in that, Also includes: The ultrafiltration flushing water path is directly connected to one of the outlets of the ultrafiltration filter element.