Filter element for preventing TDS value of first cup of water from being too high
By designing a filter element containing resin, partitions, silicon films, and activated carbon, the problem of high TDS value of the first cup of water in the reverse osmosis water purifier is solved, and the more efficient water filtration and adsorption effect is achieved, and the water purification is improved. Overall performance of the device.
Patent Information
- Application Number
- CN202420834503.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-22
AI Technical Summary
After the existing reverse osmosis water purifier stops working, the TDS value of the first cup of water is often high, resulting in a decrease in the quality of the pure water.
Design a filter element including a filter case, RO film, and a filter element. The cover of the filter element is equipped with a sealing cavity surrounded by resin housing and lid. Through the combination of these materials, the adsorption and filter RO membrane positive penetration of the yin and cationic ions can be reduced to reduce the TDS value of the first glass of water.
It effectively reduces the TDS value of the first cup of water, avoiding the degradation of pure water quality, while improving the adsorption capacity and filtration efficiency of the filter element, reducing system complexity and water waste.
Smart Images
Figure CN222389703U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of water purifier equipment, in particular to a filter element that prevents the TDS value of a first cup of water from being too high. Background Art
[0002] At present, the high-throughput reverse osmosis water purifiers on the market have the problem of too high TDS in the first cup of water: that is, when the water purifier stops working, the pressure in front of the RO membrane decreases because the booster pump no longer works, and the RO membrane filter element will produce positive osmosis, which will cause the TDS of the pure water at the pure water end of the RO membrane filter element to rise. This phenomenon is called too high TDS in the first cup of water, also known as overnight water, which causes the first cup of TDS to be too high. When used again, the TDS value of the first cup of water will become higher due to the forward osmosis problem. After the first cup of water in normal water production, the TDS of the pure water returns to the desalination rate level of the normal water production of the RO membrane, and the TDS returns to normal levels.
[0003] The first solution on the market is to use pure water reflux and tap water mixed into the front end of the RO membrane to reduce the problem of too high TDS in the first cup of water. This solution can reduce the TDS value at the inlet end of the RO membrane, but due to long-term (overnight) forward osmosis pure water end, the TDS is still relatively high.
[0004] Another solution is to add a drain valve at the pure water end, set the system to start up regularly, open the water inlet solenoid valve, start the pump working, and use the RO membrane to produce water. The water with high TDS at the end of the RO membrane can be drained through the opened drain valve. This solution wastes water and increases the complexity of the system. It cannot completely solve the problem of too high TDS in the first cup of water. Utility Model Content
[0005] In view of the technical problems in the prior art, the utility model provides a filter element for preventing the TDS value of the first cup of water from being too high, comprising a filter housing, an RO membrane and a filter element lower cover, wherein the RO membrane and the filter element lower cover are both installed in the filter housing, and the filter element lower cover is located at the bottom end of the RO membrane, a water inlet, a pure water inlet and a concentrated water inlet are provided at the bottom end of the filter housing, the water inlet is communicated with the top end of the RO membrane, the pure water inlet is communicated with the central tube of the RO membrane, the concentrated water inlet is communicated with the bottom end of the RO membrane, a sealed cavity surrounded by a resin shell and a cover plate is provided in the filter element lower cover, the top of the sealed cavity is communicated with the central tube of the RO membrane through a first connecting hole, and the bottom is communicated with the pure water inlet through a second connecting hole, and resin is installed in the sealed cavity.
[0006] Furthermore, a partition is installed in the sealing cavity, and the partition is located below the resin. The partition is provided with a through hole, and a silicone sheet is installed in the through hole. An elastic hole is provided in the middle of the silicone sheet. The elastic hole is opened when water is produced, and the elastic hole is closed when water production stops.
[0007] Furthermore, activated carbon is installed in the sealed cavity, and the activated carbon is located between the partition and the second connecting hole.
[0008] Furthermore, the outer side of the resin is wrapped with non-woven fabric.
[0009] Furthermore, nylon meshes are installed on both upper and lower sides of the resin, and the nylon meshes are connected to the first connecting hole and the through hole.
[0010] Furthermore, the resin has a flat structure.
[0011] Furthermore, there is a water inlet channel between the RO membrane and the inner wall of the filter housing and the lower cover of the filter element, one end of the water inlet channel is connected to the top of the RO membrane, and the other end is connected to the water inlet, the inside of the central tube of the RO membrane is a pure water channel, and the pure water channel is connected to the pure water port, and there is a wastewater channel between the sealed cavity and the lower cover of the filter element, one end of the wastewater channel is connected to the bottom end of the RO membrane, and the other end is connected to the concentrated water port.
[0012] Beneficial effects:
[0013] 1. In the utility model, by setting the sealing cavity and the resin in the sealing cavity, the anions and cations that are positively permeated by the RO membrane can be adsorbed when the water production is stopped, thereby reducing the TDS value of the first cup of water.
[0014] 2. In the utility model, by setting the partition and the silica gel sheet, the amount of pure water after the RO membrane can be reduced, and the TDS value of the first cup of water can be further reduced. Specifically, when making water, the elastic holes on the silica gel sheet are opened under the action of pressure, and the pure water can pass through normally. When the water making is stopped, the elastic holes on the silica gel sheet are closed. At this time, the pure water cannot enter the cavity below the partition, and the anions and cations that are positively permeated by the RO membrane will only remain in the limited cavity above the partition. By setting the activated carbon, the pure water can be further filtered, and the TDS value of the first cup of water can be further reduced.
[0015] 3. In the utility model, by wrapping the resin with non-woven fabric, the diffusion of small particles of the resin can be avoided, thereby improving the adsorption capacity of the resin; by setting two nylon nets, small particles of the resin can be prevented from entering the central tube of the RO membrane or the cavity below the partition, thereby further improving the adsorption capacity of the resin.
[0016] 4. In the utility model, the flat structure is set up, so that pure water can pass quickly during water production, so that the resin is basically in a non-working state during water production, and thus a relatively small amount (volume or weight) can be used to match the life of the RO membrane. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 for Figure 1 Detailed structural diagram at A in the middle.
[0020] Description of reference numerals:
[0021] 1. Filter housing; 1a. Water inlet; 1b. Pure water inlet; 1c. Concentrated water inlet; 2. RO membrane; 3. Filter element lower cover; 4. Resin housing; 41. First connecting hole; 5. Cover plate; 51. Second connecting hole; 6. Resin; 7. Activated carbon; 8. Partition plate; 81. Through hole; 9. Silica gel sheet; 10. Nylon mesh; 11. Water inlet channel; 12. Pure water channel; 13. Wastewater channel. DETAILED DESCRIPTION
[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0028] The utility model provides a filter element to prevent the TDS value of the first cup of water from being too high. Figure 1 , Figure 2As shown, it includes a filter housing 1, an RO membrane 2 and a filter element lower cover 3, wherein the RO membrane 2 and the filter element lower cover 3 are both installed in the filter housing 1, and the filter element lower cover 3 is located at the bottom end of the RO membrane 2, the bottom end of the filter housing 1 is provided with a water inlet 1a, a pure water inlet 1b and a concentrated water inlet 1c, and the filter element lower cover 3 is provided with a sealed cavity surrounded by a resin housing 4 and a cover plate 5, wherein the cover plate 5 is located at the bottom end of the resin housing 4, the top of the sealed cavity is connected to the central tube of the RO membrane 2 through a first connecting hole 41, and the bottom is connected to the pure water inlet 1a through a second connecting hole 51. 1b is connected, a resin 6 is installed in the sealed cavity, a water inlet channel 11 is formed between the RO membrane 2 and the inner wall of the filter housing 1 and the filter element lower cover 3, one end of the water inlet channel 11 is connected to the top of the RO membrane 2, and the other end is connected to the water inlet 1a, a pure water channel 12 is formed inside the central tube of the RO membrane 2, and the pure water channel 12 is connected to the pure water port 1b, a waste water channel 13 is formed between the sealed cavity and the filter element lower cover 3, one end of the waste water channel 13 is connected to the bottom of the RO membrane 2, and the other end is connected to the concentrated water port 1c, Figure 1 and Figure 2 The arrow in the middle indicates the direction of water flow.
[0029] In this embodiment, by providing the sealed cavity and the resin 6 in the sealed cavity, the anions and cations that are positively permeated by the RO membrane 2 can be adsorbed when water production is stopped, thereby reducing the TDS value of the first cup of water.
[0030] In the present invention, preferably, Figure 1 , Figure 2 As shown, a partition 8 is also installed in the sealed cavity, and the partition 8 is located below the resin 6. A through hole 81 is provided on the partition 8, and a silicone sheet 9 is installed in the through hole 81. An elastic hole is provided in the middle of the silicone sheet 9. The elastic hole is opened when water is produced, and closed when water production is stopped. Specifically, a film or other similar structure can be used; activated carbon 7 is also installed in the sealed cavity, and the activated carbon 7 is located between the partition 8 and the second connecting hole 51.
[0031] In this embodiment, by setting the partition 8 and the silicone sheet 9, the amount of pure water behind the RO membrane 2 can be reduced, and the TDS value of the first cup of water can be further reduced. Specifically, when making water, the elastic holes on the silicone sheet 9 are opened under the action of pressure, and pure water can pass through normally. When the water making is stopped, the elastic holes on the silicone sheet 9 are closed. At this time, pure water cannot enter the cavity below the partition 8, and the anions and cations that are positively permeated by the RO membrane 2 will only remain in the limited cavity above the partition 8; by setting the activated carbon 7, the pure water can be further filtered, and the TDS value of the first cup of water can be further reduced.
[0032] In the present invention, preferably, Figure 2As shown, the outside of the resin 6 is wrapped with non-woven fabric; nylon meshes 10 are installed on both the upper and lower sides of the resin 6, and the nylon meshes 10 are connected to the first connecting hole 41 and the through hole 81.
[0033] In this embodiment, by setting up the non-woven fabric to wrap the resin 6, the diffusion of small particles of the resin 6 can be avoided, thereby improving the adsorption capacity of the resin 6; by setting up two nylon meshes 10, the small particles of the resin 6 can be prevented from entering the central tube of the RO membrane 2 or the cavity below the partition 8, further preventing the diffusion of small particles of the resin 6, thereby improving the adsorption capacity of the resin 6.
[0034] In the present invention, preferably, Figure 2 As shown, the resin 6 has a flat structure.
[0035] In this embodiment, the flat structure allows pure water to pass quickly during water production, so that the resin 6 is basically inactive during water production, thereby matching the life of the RO membrane 2 with a relatively small amount (volume or weight).
[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0037] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A filter element for preventing the TDS value of a first cup of water from being too high, comprising a filter housing (1), an RO membrane (2) and a filter element lower cover (3), wherein the RO membrane (2) and the filter element lower cover (3) are both installed in the filter housing (1), and the filter element lower cover (3) is located at the bottom end of the RO membrane (2), and the bottom end of the filter housing (1) is provided with a water inlet (1a), a pure water inlet (1b) and a concentrated water inlet (1c), wherein the water inlet (1a) is communicated with the top end of the RO membrane (2), the pure water inlet (1b) is communicated with the central tube of the RO membrane (2), and the concentrated water inlet (1c) is communicated with the bottom end of the RO membrane (2), characterized in that: A sealed cavity surrounded by a resin shell (4) and a cover plate (5) is provided in the filter element lower cover (3); the top of the sealed cavity is connected to the central tube of the RO membrane (2) through a first connecting hole (41), and the bottom is connected to the pure water port (1b) through a second connecting hole (51); and resin (6) is installed in the sealed cavity.
2. A filter element for preventing the first cup of water from having a high TDS value according to claim 1, characterized in that: A partition (8) is also installed in the sealed cavity. The partition (8) is located below the resin (6). A through hole (81) is provided on the partition (8). A silicone sheet (9) is installed in the through hole (81). An elastic hole is provided in the middle of the silicone sheet (9). The elastic hole is opened when water is produced and closed when water production stops.
3. A filter element for preventing the first cup of water from having a high TDS value according to claim 2, characterized in that: Activated carbon (7) is also installed in the sealed cavity, and the activated carbon (7) is located between the partition (8) and the second connecting hole (51).
4. A filter element for preventing the first cup of water from having a high TDS value according to claim 3, characterized in that: The outside of the resin (6) is wrapped with non-woven fabric.
5. A filter element for preventing the first cup of water from having a high TDS value according to claim 4, characterized in that: Nylon nets (10) are installed on both the upper and lower sides of the resin (6), and the nylon nets (10) are connected to the first connecting hole (41) and the through hole (81).
6. A filter element for preventing the first cup of water from having a high TDS value according to any one of claims 1 to 5, characterized in that: The resin (6) has a flat structure.
7. A filter element for preventing the first cup of water from having a high TDS value according to claim 6, characterized in that: A water inlet channel (11) is provided between the RO membrane (2), the inner wall of the filter housing (1) and the filter element lower cover (3); one end of the water inlet channel (11) is connected to the top of the RO membrane (2), and the other end is connected to the water inlet (1a); the interior of the central tube of the RO membrane (2) is a pure water channel (12); the pure water channel (12) is connected to the pure water outlet (1b); a waste water channel (13) is provided between the sealed cavity and the filter element lower cover (3); one end of the waste water channel (13) is connected to the bottom of the RO membrane (2), and the other end is connected to the concentrated water outlet (1c).