RO (Reverse Osmosis) pure water backflow structure

Abstract

The utility model discloses a reverse osmosis (RO) pure water backflow structure, which comprises a composite filter element assembly and an RO membrane filter element assembly, the composite filter element assembly comprises a filter element barrel body, a front filter material is arranged in the filter element barrel body, a pure water cavity sleeve is arranged at the bottom of the front filter material, a rear carbon rod barrel body is arranged in the pure water cavity sleeve, and the rear carbon rod barrel body is connected with the RO membrane filter element assembly. The water purifier disclosed by the utility model has the beneficial effects that after the whole machine is completely shut down, pure water in the pure water cavities in the front and back composite filter elements flows into the pure water end of the RO membrane from the water inlet end of the rear filter material through internal air pressure, and the wastewater outlet end of the RO filter element is communicated with the pure water end of the RO membrane due to the fact that a wastewater valve is opened and has no pressure; raw water and waste water in the RO membrane are squeezed out from the waste water port by water flowing back from the pure water cavity through pressure, so that the membrane is soaked in the pure water, a salt finished product in the pure water is diluted, the effluent desalination rate of the pure water is reduced, and the service life of the RO membrane is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of RO water purifiers, in particular to an RO pure water reflux structure. Background Art

[0002] Most of the existing RO water purifiers are equipped with external water drive tanks. After the faucet is turned off, the whole machine will be delayed to shut down. The pure water generated during the delayed shutdown period will be stored in the external water drive tank. When the whole machine is shut down, the external water drive tank uses the pressure of the internal capsule to make the water in the water drive tank flow back to the water inlet end of the RO membrane filter element, and flush the raw water in the RO membrane, reducing the TDS value of the raw water end of the RO membrane, thereby achieving the effect of reducing the first cup of water.

[0003] However, when the whole machine is completely shut down, the above structure cannot make the membrane immersed in pure water, cannot effectively dilute the salt products in the pure water, cannot reduce the desalination rate of the pure water outlet, and cannot effectively extend the service life of the RO membrane. Utility Model Content

[0004] The purpose of the utility model is to provide a RO pure water reflux structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an RO pure water reflux structure, comprising: a composite filter element assembly and an RO membrane filter element assembly, the composite filter element assembly comprising a filter element barrel, a pre-filter material is installed inside the filter element barrel, a pure water cavity sleeve is provided at the bottom of the pre-filter material, a post-carbon rod barrel is provided inside the pure water cavity sleeve, a post-filter material is installed inside the post-carbon rod barrel, and a pure water cavity is formed between the bottom of the post-carbon rod barrel and the bottom of the inner wall of the pure water cavity sleeve;

[0006] When the whole machine is completely shut down, the water returning from the pure water chamber squeezes out the raw water and waste water of the RO membrane filter element from the waste water outlet through pressure, so that the membrane is immersed in pure water, diluting the salt products inside the pure water and reducing the desalination rate of the pure water outlet.

[0007] Preferably, the RO membrane filter element assembly comprises a RO membrane barrel and a RO membrane filter element installed inside the RO membrane barrel.

[0008] Preferably, a filter element cover is fixedly connected to the end of the filter element barrel.

[0009] Preferably, the inner thread of the filter element cover is connected to the carbon rod upper end cover, the outer side of the carbon rod upper end cover is sleeved with a front lower end cover, and the front filter material is sleeved on the outer side of the front lower end cover.

[0010] Preferably, an upper end cover is installed on the top of the pre-filter material, and the upper end cover is threadedly connected to the filter element cover.

[0011] Preferably, the post-filter material is installed at the bottom of the upper end cover of the carbon rod, and the upper end cover of the carbon rod and the post-filter material are both hollow structures and are connected.

[0012] Compared with the prior art, the utility model has the following beneficial effects: when the whole machine is completely shut down, the pure water in the pure water cavity inside the front and rear composite filter elements flows into the pure water end of the RO membrane from the water inlet end of the rear filter material through the internal air pressure, and the waste water outlet end of the RO filter element is pressure-free because the waste water valve is open, while the water refluxed from the pure water cavity squeezes out the raw water and waste water in the RO membrane from the waste water outlet through the pressure, so that the membrane is immersed in pure water, diluting the salt product inside the pure water, reducing the desalination rate of the pure water outlet, and extending the service life of the RO membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the RO membrane filter element assembly of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the composite filter element assembly of the utility model;

[0016] Figure 4 This is a schematic diagram of the waterway structure when the filter element of the utility model works normally;

[0017] Figure 5 This is a schematic diagram of the water path structure when flushing the filter element of the utility model;

[0018] Figure 6 This is a schematic diagram of the corresponding names of water flow colors in the utility model.

[0019] In the figure: 1. filter element cover; 2. front filter material; 3. front lower end cover; 4. carbon rod upper end cover; 5. rear carbon rod barrel; 6. rear filter material; 7. pure water chamber sleeve; 8. filter element barrel; 9. RO membrane filter element; 10. upper end cover; 11. RO membrane barrel; 12. composite filter element assembly; 13. RO membrane filter element assembly. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 , 2, 3, 4, 5, and 6, the utility model provides a technical solution: an RO pure water reflux structure, comprising: a composite filter element assembly 12 and an RO membrane filter element assembly 13, the composite filter element assembly 12 comprises a filter element barrel 8, the filter element barrel 8 is used to encapsulate the internal filter material and the shell that carries water, and is connected to the filter element cover 1 by spin melting welding to form an independent cavity, the interior of the filter element barrel 8 is installed with a pre-filter material 2, which is fixed together by the upper end cover 10, the sealing ring and the filter material by hot melt adhesive, and is used for preliminary filtration of tap water or raw water, thereby protecting the RO membrane filter element and extending the service life of the RO membrane, and a pure water cavity sleeve 7 is provided at the bottom of the pre-filter material 2, and the pure water cavity sleeve 7 is fixedly connected with the front lower end cover 3 by spin-melting welding or snap-fitting to form an independent open cavity. The outside of the sleeve is the front water inlet, and the inside is the pure water cavity for storing pure water. After the whole machine is shut down, the pure water is returned to the water inlet end of the RO membrane by air pressure. The interior of the pure water cavity sleeve 7 is provided with a rear carbon rod barrel 5, which is fixed to the front lower end cover 3 by spin-melting welding to form an independent rear clean water cavity inside. The cavity is inside the pure water cavity and is used to isolate the pure water in the pure water cavity and the clean water of the rear filter material. The interior of the rear carbon rod barrel 5 is installed with a rear filter material 6, and a pure water cavity is formed between the bottom of the rear carbon rod barrel 5 and the bottom of the inner wall of the pure water cavity sleeve 7.

[0022] It should be noted that the utility model adds a pure water chamber designed inside the RO filter element so that the pure water generated by the RO filter element after the delayed shutdown of the whole machine is stored in the separate pure water chamber of the front and rear composite filter elements. When the whole machine is completely shut down, the pure water in the pure water chamber inside the filter element barrel 8 is caused by the internal air pressure to flow from the water inlet end of the rear filter material 6 to the pure water end of the RO membrane filter element assembly 13. The wastewater outlet end of the RO membrane filter element assembly 13 is pressure-free because the wastewater valve is open, and the water refluxed from the pure water chamber squeezes out the raw water and wastewater of the RO membrane filter element assembly 13 itself from the wastewater outlet through the pressure, so that the membrane is immersed in pure water, diluting the salt product inside the pure water, reducing the desalination rate of the pure water outlet, and extending the service life of the RO membrane.

[0023] See also Figure 1 , 2 As shown, the RO membrane filter element assembly 13 includes a RO membrane barrel 11 and a RO membrane filter element 9 installed inside the RO membrane barrel 11 .

[0024] It should be noted that the RO membrane filter element 9 of the present invention uses glue to roll the membrane, filter cloth, and filter screen on the central tube to form a reverse osmosis element, and the original element with reverse osmosis function is encapsulated inside the shell by spin melting welding to achieve a filtering effect and intercept specified impurities.

[0025] See also Figure 3As shown, a filter cover 1 is fixedly connected to the end of the filter barrel 8, the internal thread of the filter cover 1 is connected to the carbon rod upper end cover 4, the outer side of the carbon rod upper end cover 4 is sleeved with a front lower end cover 3, the front filter material 2 is sleeved on the outer side of the front lower end cover 3, and the top of the front filter material 2 is installed with an upper end cover 10, which is threadedly connected to the filter cover 1.

[0026] It should be noted that the filter element cover 1 of the utility model is fixedly connected to the water stop valve, the cover plate and the sealing ring by ultrasonic welding, and is connected to the filter element barrel 8 by spin melting welding to form a large cavity, which is a shell used for filtering and storing water for the entire filter element. One end of the front lower end cover 3 is fixed to the front filter material 2 by hot melt glue to form a front filter material filtration system, and the other end is fixed to the pure water cavity sleeve 7 by spin melting welding to form a pure water cavity inside for storing refluxed pure water.

[0027] See also Figure 3 , 4 As shown in , 5, the post-filter material 6 is installed at the bottom of the carbon rod upper end cover 4, and the carbon rod upper end cover 4 and the post-filter material 6 are both hollow structures and are connected.

[0028] It should be noted that the post-filter material 6 of the utility model is composed of a post-filter carbon rod and a post-filter lower end cover, which are fixed by hot-melt glue and are used to further filter the RO pure water and improve the taste of the water. The upper end of the carbon rod upper end cover 4 is fixed to the filter element cover by a slot and a sealing ring to isolate the post-filter water from the purified water. The other end is fixed to the post-filter material 6 by hot-melt glue to form a filtering system for the post-filter material.

[0029] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to 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 invention.

[0030] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0031] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A RO pure water reflux structure, comprising: A composite filter element assembly (12) and an RO membrane filter element assembly (13), characterized in that: the composite filter element assembly (12) comprises a filter element barrel (8), a pre-filter material (2) is installed inside the filter element barrel (8), a pure water cavity sleeve (7) is provided at the bottom of the pre-filter material (2), a post-carbon rod barrel (5) is provided inside the pure water cavity sleeve (7), a post-filter material (6) is installed inside the post-carbon rod barrel (5), and a pure water cavity is formed between the bottom of the post-carbon rod barrel (5) and the bottom of the inner wall of the pure water cavity sleeve (7); when the whole machine is completely shut down, the water refluxed from the pure water cavity squeezes out the raw water and waste water of the RO membrane filter element assembly (13) itself from the waste water outlet through pressure, so that the membrane is immersed in pure water, the salt product inside the pure water is diluted, and the desalination rate of the pure water outlet is reduced.

2. The RO pure water reflux structure according to claim 1, characterized in that: The RO membrane filter element assembly (13) comprises an RO membrane barrel (11) and an RO membrane filter element (9) installed inside the RO membrane barrel (11).

3. The RO pure water reflux structure according to claim 2, characterized in that: A filter element cover (1) is fixedly connected to the end of the filter element barrel (8).

4. The RO pure water reflux structure according to claim 3, characterized in that: The inner thread of the filter element cover (1) is connected to the carbon rod upper end cover (4), the outer side of the carbon rod upper end cover (4) is sleeved with a front lower end cover (3), and the front filter material (2) is sleeved on the outer side of the front lower end cover (3).

5. The RO pure water reflux structure according to claim 4, characterized in that: An upper end cover (10) is installed on the top of the pre-filter material (2), and the upper end cover (10) is threadedly connected to the filter element cover (1).

6. The RO pure water reflux structure according to claim 1, characterized in that: The post-filter material (6) is installed at the bottom of the carbon rod upper end cover (4); the carbon rod upper end cover (4) and the post-filter material (6) are both hollow structures and are connected.

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