CN107998886B

CN107998886B - Reverse osmosis filter core, reverse osmosis water purification system and reverse osmosis water purifier

Info

Publication number: CN107998886B
Application number: CN201611204673.4A
Authority: CN
Inventors: 蔡雪刚; 桂鹏; 宋国栋; 孙天厚; 谈菲
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2016-12-22
Filing date: 2016-12-22
Publication date: 2021-04-23
Anticipated expiration: 2036-12-22
Also published as: CN107998886A; CN113019126A; CN113019126B

Abstract

The invention discloses a reverse osmosis filter element, a reverse osmosis water purification system and a reverse osmosis water purifier, wherein the reverse osmosis filter element comprises a membrane element and a shell, the membrane element comprises a central tube group, a plurality of reverse osmosis membrane groups, a first end cover and a second end cover, and the central tube group comprises a pure water pipe and a plurality of waste water pipes; a plurality of reverse osmosis membrane groups are arranged around the central pipe group; the first end cover and the second end cover are respectively covered at two ends of the plurality of reverse osmosis membrane groups and the central pipe group; the first end cover is provided with a pure water outlet; the second end cover is provided with a waste water outlet; the shell includes bottle and lid, and the film element is installed in the shell, and the lid is equipped with the pure water chamber, and the pure water chamber communicates with the pure water discharge port is sealed, and the bottle be provided with former water chamber and waste water chamber, the space intercommunication between former water chamber and film element and the bottle, waste water chamber and the sealed intercommunication of waste water discharge port. The technical scheme of the invention can simplify the structure of the cover body of the shell of the reverse osmosis filter element.

Description

Reverse osmosis filter core, reverse osmosis water purification system and reverse osmosis water purifier

Technical Field

The invention relates to the technical field of reverse osmosis water purification, in particular to a reverse osmosis filter element, a reverse osmosis water purification system and a reverse osmosis water purifier.

Background

The reverse osmosis water purifier is characterized in that a reverse osmosis filter element is used for purifying water, the reverse osmosis filter element generally comprises a shell and a reverse osmosis membrane element, and an existing reverse osmosis membrane element with side inflow separates raw water, pure water and waste water by means of a water channel converter, so that the inlet and the outlet of the raw water, the pure water and the waste water are concentrated on a cover body of the shell, and the structure of the cover body of the shell of the reverse osmosis filter element is complex.

Disclosure of Invention

The invention mainly aims to provide a reverse osmosis filter element, aiming at simplifying the structure of a cover body of a shell of the reverse osmosis filter element.

In order to achieve the above object, the present invention provides a reverse osmosis filter cartridge, comprising:

the membrane element comprises a central tube group, a plurality of reverse osmosis membrane groups, a first end cover and a second end cover, wherein the central tube group comprises a pure water pipe and a plurality of waste water pipes arranged around the pure water pipe at intervals; a plurality of reverse osmosis membrane groups are arranged around the central tube group; the first end cover and the second end cover are respectively covered at two ends of the plurality of reverse osmosis membrane groups and the two ends of the central pipe group in the length direction and are respectively connected with the plurality of reverse osmosis membrane groups in a sealing manner; the first end cover is provided with a pure water outlet communicated with the pure water pipe; the second end cover is provided with a waste water outlet communicated with the waste water pipe;

the membrane element comprises a membrane element and a membrane, wherein the membrane element is arranged in the shell; the cover body is in butt joint with the first end cover, the cover body is provided with a pure water cavity communicated with an external water path, and the pure water cavity is in sealed communication with the pure water outlet; the bottle body is in butt joint with the second end cover, the bottle body is provided with a raw water cavity and a waste water cavity which are respectively communicated with an external water channel, the raw water cavity is communicated with a gap between the membrane element and the bottle body, and the waste water cavity is communicated with the waste water discharge port in a sealing mode.

Preferably, an end of the pure water pipe remote from the pure water discharge port is blocked to allow pure water to flow toward the pure water discharge port; and/or the end of the waste pipe remote from the waste water discharge opening is blocked so that waste water flows towards the waste water discharge opening.

Preferably, the number of said wastewater tubes is N, and N is greater than or equal to 3; the cross section of the pure water pipe is arranged in an N-edge shape and correspondingly provided with N side surfaces, and each side surface is provided with a pure water inlet hole communicated with an internal pipeline of the pure water pipe; each waste water pipe is arranged corresponding to the position of one side surface of the pure water pipe.

Preferably, the cover body comprises a top wall and a cover edge extending from the periphery of the top wall to the bottle body, a first annular rib is convexly arranged on the inner surface of the top wall, and the inner peripheral wall of the first annular rib is surrounded to form the pure water cavity; the first end cover is provided with a first extending pipe which extends into the pure water pipe and is communicated with the pure water pipe in a protruding mode on the surface, facing the pure water pipe, of the first end cover, a first connecting pipe which is communicated with the first extending pipe is arranged on the surface, facing the cover body, of the first end cover, the first connecting pipe extends into the pure water cavity and is in sealing butt joint with the first annular rib, and the first connecting pipe faces the pipe opening of the cover body to form the pure water outlet.

Preferably, a second annular rib is convexly arranged at the bottom of the bottle body, the inner peripheral wall of the second annular rib is arranged in a surrounding manner to form the waste water cavity, and the outer peripheral wall of the second annular rib and the side part of the bottle body are arranged in a surrounding manner to form a raw water cavity;

the second end cover is towards the surface of waste pipe protruding a plurality of second that are equipped with stretches into the pipe, and each the second stretch into the pipe stretch into one in the waste pipe and with the waste pipe intercommunication, the second end cover is towards the surface of the bottom of bottle is equipped with a plurality of the second stretches into the pipe intercommunication and sets up the second connecting pipe, the second connecting pipe stretch into in the waste water chamber and with the sealed butt of second annular muscle, the second connecting pipe orientation the mouth of pipe of bottle bottom constitutes waste water discharge port.

Preferably each of said ro membrane modules has a first portion located inside said central tube bank and a second portion located outside said central tube bank, each of said waste water line and said plain water line being separated by a first portion of one of said ro membrane modules; a second portion of the plurality of sets of reverse osmosis membranes surrounds the central tube set.

Preferably, each reverse osmosis membrane group comprises a reverse osmosis membrane, a water inlet diversion net and a pure water diversion net;

the front surface of the reverse osmosis membrane of each reverse osmosis membrane group is folded inwards, and the second parts of the reverse osmosis membrane groups are overlapped and wound onto the central pipe group along the circumferential direction of the central pipe group together; a water inlet flow passage is formed between the interlayers on the front sides of the same reverse osmosis membrane; a water production flow channel is formed between the reverse side interlayers of two adjacent reverse osmosis membranes; the water inlet flow guide net and the waste water pipe are positioned in the water inlet flow passage, and the pure water flow guide net is positioned in the water production flow passage.

The invention also provides a reverse osmosis water purification system, which comprises a water inlet pipeline, a pure water pipeline, a waste water pipeline and a reverse osmosis filter element; the reverse osmosis filter element comprises a membrane element and a shell, the membrane element comprises a central tube group, a plurality of reverse osmosis membrane groups, a first end cover and a second end cover, and the central tube group comprises a pure water pipe and a plurality of waste water pipes arranged around the pure water pipe at intervals; a plurality of reverse osmosis membrane groups are arranged around the central tube group; the first end cover and the second end cover are respectively covered at two ends of the plurality of reverse osmosis membrane groups and the two ends of the central pipe group in the length direction and are respectively connected with the plurality of reverse osmosis membrane groups in a sealing manner; the first end cover is provided with a pure water outlet communicated with the pure water pipe; the second end cover is provided with a waste water outlet communicated with the waste water pipe; the shell comprises a bottle body and a cover body covering the bottle body, and the membrane element is arranged in the shell; the cover body is in butt joint with the first end cover, the cover body is provided with a pure water cavity communicated with an external water path, and the pure water cavity is in sealed communication with the pure water outlet; the bottle body is butted with the second end cover, the bottle body is provided with a raw water cavity and a waste water cavity which are respectively communicated with an external water channel, the raw water cavity is communicated with a gap between the membrane element and the bottle body, and the waste water cavity is hermetically communicated with the waste water outlet; the water inlet pipeline is communicated with the raw water cavity of the bottle body, the pure water pipeline is communicated with the pure water cavity of the cover body, and the waste water pipeline is communicated with the waste water cavity of the bottle body.

Preferably, the water inlet pipeline is sequentially provided with a preposed composite filter element, a water inlet valve and a booster pump along the water inlet direction; the pure water pipeline is sequentially provided with a rear granular carbon filter element, a one-way valve and a high-pressure switch along the water outlet direction, and the waste water pipeline is provided with a waste water valve; the reverse osmosis water purification system further comprises a water outlet device, and the water outlet device is communicated with the pipe orifice of the pure water pipeline far away from the reverse osmosis filter element.

The invention also provides a reverse osmosis water purifier, which comprises a reverse osmosis water purification system, wherein the reverse osmosis water purification system comprises a water inlet pipeline, a pure water pipeline, a waste water pipeline and a reverse osmosis filter element; the reverse osmosis filter element comprises a membrane element and a shell, the membrane element comprises a central tube group, a plurality of reverse osmosis membrane groups, a first end cover and a second end cover, and the central tube group comprises a pure water pipe and a plurality of waste water pipes arranged around the pure water pipe at intervals; a plurality of reverse osmosis membrane groups are arranged around the central tube group; the first end cover and the second end cover are respectively covered at two ends of the plurality of reverse osmosis membrane groups and the two ends of the central pipe group in the length direction and are respectively connected with the plurality of reverse osmosis membrane groups in a sealing manner; the first end cover is provided with a pure water outlet communicated with the pure water pipe; the second end cover is provided with a waste water outlet communicated with the waste water pipe; the shell comprises a bottle body and a cover body covering the bottle body, and the membrane element is arranged in the shell; the cover body is in butt joint with the first end cover, the cover body is provided with a pure water cavity communicated with an external water path, and the pure water cavity is in sealed communication with the pure water outlet; the bottle body is butted with the second end cover, the bottle body is provided with a raw water cavity and a waste water cavity which are respectively communicated with an external water channel, the raw water cavity is communicated with a gap between the membrane element and the bottle body, and the waste water cavity is hermetically communicated with the waste water outlet; the water inlet pipeline is communicated with the raw water cavity of the bottle body, the pure water pipeline is communicated with the pure water cavity of the cover body, and the waste water pipeline is communicated with the waste water cavity of the bottle body.

In the technical scheme of the invention, the pure water outlet of the membrane element is arranged on the first end cover, and the wastewater outlet is arranged on the second end cover, so that pure water and wastewater can be discharged from different directions; set up the pure water cavity with outside water route intercommunication on the lid of reverse osmosis filter core, set up former water cavity and the waste water chamber with outside water route intercommunication on the bottle, so for need not with the help of the water route converter when lid and bottle equipment, simplified the structure of whole reverse osmosis filter core, and then made things convenient for the lid of reverse osmosis filter core and the equipment of bottle. And, the pure water chamber communicates with the pure water discharge port is sealed, and the space intercommunication between former water chamber and membrane element and the bottle, the sealed intercommunication of waste water chamber and waste water discharge port have realized that the lid of reverse osmosis filter core goes out the pure water, and the bottle advances the waterway structure of former water and play waste water to can be better distinguish pure water and waste water, reduced the risk that the pure water is polluted by waste water.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a reverse osmosis filter element of the present invention;

FIG. 2 is an exploded schematic view of the reverse osmosis cartridge of FIG. 1;

FIG. 3 is a schematic cross-sectional view A-A of the reverse osmosis cartridge of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a membrane element of the reverse osmosis cartridge of FIG. 3;

FIG. 5 is a schematic diagram of the construction of the center tube set of the reverse osmosis cartridge of FIG. 1;

FIG. 6 is a top view of a RO membrane module of the RO cartridge of FIG. 1, with a waste water pipe and a pure water pipe engaged;

fig. 7 is a schematic structural diagram of an embodiment of the reverse osmosis water purification system of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Membrane element	200	Outer casing
110	Central pipe group	120	Reverse osmosis membrane group
				130	First end cap	140	Second end cap
111	Pure water pipe	112	Waste pipe
				1111	Pure water inlet hole	1121	Waste water inlet hole
121	Reverse osmosis membrane	122	Water inlet flow guide net
				123	Pure water diversion net	131	Pure water outlet
132	First extension pipe	133	First connecting pipe
				141	Waste water discharge port	142	Second extension tube
143	Second connecting pipe	210	Bottle body
				220	Cover body	211	Second annular rib
221	Roof wall	222	Cover rim
				223	First annular rib	500	Water outlet device
600	Water inlet pipeline	700	Pure water pipeline
				800	Waste water pipeline	900	Reverse osmosis filter element
610	Front composite filter element	620	Water inlet valve
				630	Booster pump	710	Postposition granular carbon filter element
720	One-way valve	730	High-voltage switch
				810	Waste water valve

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a reverse osmosis filter element.

Referring to fig. 1 to 3, in an embodiment of the present invention, the reverse osmosis filter cartridge 900 includes a membrane element 100 and a housing 200, the membrane element 100 includes a central tube group 110, a plurality of reverse osmosis membrane groups 120, a first end cap 130 and a second end cap 140, the central tube group 110 includes a pure water tube 111 and a plurality of waste water tubes 112 spaced from each other, and the plurality of waste water tubes 112 are arranged around the pure water tube 111; a plurality of reverse osmosis membrane modules 120 are disposed around the central tube bank 110; the first end cap 130 and the second end cap 140 respectively cover both ends of the plurality of reverse osmosis membrane groups 120 and the central tube group 110 in the length direction, and are respectively connected with the plurality of reverse osmosis membrane groups 120 in a sealing manner; the first end cap 130 is provided with a pure water discharge port 131 (see fig. 4) communicating with the pure water pipe 111; the second end cap 140 is provided with a waste water outlet 141 (see fig. 4) communicated with the waste water pipe 112; the housing 200 includes a bottle 210 and a cover 220 covering the bottle 210, the membrane element 100 is installed in the housing 200, the cover 220 is butted with the first end cap 130, the cover 220 is provided with a pure water chamber communicated with an external water path, the pure water chamber is hermetically communicated with the pure water outlet 131, the bottle 210 is provided with a raw water chamber and a waste water chamber respectively communicated with the external water path, the raw water chamber is communicated with a gap between the membrane element 100 and the bottle 210, and the waste water chamber is hermetically communicated with the waste water outlet 141.

In the technical scheme of the invention, the pure water outlet 131 of the membrane element 100 is arranged on the first end cover 130, and the waste water outlet 141 is arranged on the second end cover 140, so that pure water and waste water can be discharged from different directions; set up the pure water cavity with outside water route intercommunication on reverse osmosis filter core 900's lid 220, set up former water cavity and the waste water chamber with outside water route intercommunication on the bottom of bottle 210, so for need not with the help of the water route converter when lid 220 and bottle 210 equipment, and then simplified whole reverse osmosis filter core 900's structure, and then made things convenient for the equipment of reverse osmosis filter core 900's lid and bottle. And, the pure water chamber is sealed with pure water discharge port 131 and is linked together, and the space intercommunication between former water chamber and membrane element 100 and the bottle 210, waste water chamber and the sealed intercommunication of waste water discharge port 141 have realized that reverse osmosis filter core 900's lid 220 goes out the pure water, and bottle 210 advances the waterway structure of former water and play waste water to can be better distinguish pure water and waste water, reduced the risk that the pure water is polluted by waste water.

The central tube group 110 of the reverse osmosis membrane element 100 includes a plain water tube 111 and a plurality of waste water tubes 112 surrounding the plain water tube 111; each waste water pipe 112 corresponds to one reverse osmosis membrane group 120, so that the reverse osmosis membrane element 100 can be coiled by multiple membranes, the number of flow channels of the reverse osmosis membrane element 100 is increased, and the raw water flux is increased; meanwhile, the problem that the osmotic pressure is insufficient due to the overlong reverse osmosis membrane set 120 is solved, and then part of the reverse osmosis membrane set 120 does not play a role in filtration.

Since the central tube group 110 is wound at the center by the plurality of reverse osmosis membrane modules 120, after the first end cap 130 and the second end cap 140 seal both ends of the reverse osmosis membrane modules 120, a raw water path for feeding water to the outside side of the plurality of reverse osmosis membrane modules 120 and discharging waste water from the intermediate waste water pipe 112 can be formed; when the reverse osmosis filter element 900 is used, raw water flows in through a side flow, a flow passage is narrowed, the water inlet area is reduced, and the flow is greatly increased, so that the contact time of the raw water and the reverse osmosis membrane 121 can be prolonged, and the utilization rate of the raw water is improved; meanwhile, because the raw water inlet area is reduced, the surface water flow speed of the reverse osmosis membrane 122 can be increased (when the water inlet flux is constant, the relation between the water inlet flux Q and the water flow speed V is V-Q/S, wherein S is the water inlet area, specifically, S-Ld, L is the length of the water inlet end membrane, d is the section thickness, and the side flow is mainly reduced by L, and in addition, the thickness d can be reduced by using the water inlet flow guide net 122 with small thickness), the surface concentration polarization of the reverse osmosis membrane 121 can be reduced, the pollution speed of the reverse osmosis membrane element 100 can be reduced, the raw water recovery rate can be improved, and the waste problem of raw water can be improved.

Referring to fig. 3, in order to facilitate the collection of pure water, the end of the pure water pipe 111 away from the pure water outlet 131 may be sealed, and at this time, the flow direction of pure water in the pure water pipe 111 is constant, that is, pure water in the pure water pipe 111 can only be discharged from the pure water outlet 131. Similarly, in order to facilitate the discharge of the waste water, an end of at least one waste pipe 112 of the plurality of waste pipes 112, which is far from the waste water discharge port 141, may be blocked. At this time, the flow direction of the wastewater in the wastewater pipe 112 is constant, that is, the wastewater in the wastewater pipe 112 can be discharged only from the wastewater discharge port 141.

In practical use, the reverse osmosis membrane element 100 is generally vertically arranged, the corresponding pure water pipe 111 and the plurality of waste water pipes 112 are also arranged along the vertical direction, at this time, pure water is discharged from the upper end of the reverse osmosis membrane element 100, and waste water is discharged from the lower end of the reverse osmosis membrane element 100, so that the waste water in the reverse osmosis membrane element 100 can be effectively prevented from being mixed with the pure water in the reverse osmosis membrane element 100, and further the pure water in the reverse osmosis membrane element 100 can be prevented from being polluted. The specific flow of water in the RO membrane unit 100 can be referred to as 3, wherein the dotted line with an arrow indicates the direction of water flow, and pure water enters the pure water pipe 111 from the pure water inlet 1111 (see FIG. 4) of the pure water pipe 111 and flows upward out of the pure water pipe 111 along the passage inside the pure water pipe 111; the waste water enters the waste water pipe 112 from the waste water inlet hole 1121 (see fig. 5) of the waste water pipe 112, and flows down the waste water pipe 112 along the passage inside the waste water pipe 112.

The number of wastewater pipes 112 determines the number of ro membrane groups 120 and the size of the plain water pipe 111. Specifically, one RO membrane set 120 is disposed corresponding to one waste water pipe 112, and the more the waste water pipes 112 are, the larger the number of the RO membrane sets 120 is, the larger the flux of the corresponding RO membrane element 100 is, and the larger the size of the pure water pipe 111 is accordingly. The specific number and shape of the waste water pipes 112 and the shape of the pure water pipes 111 can be set according to practical situations, please refer to fig. 5 in combination with fig. 4, in an embodiment of the present invention, the number of the waste water pipes 112 is N, where N is greater than or equal to 3; the cross section of the pure water pipe 111 is arranged in an N-edge shape and correspondingly provided with N side surfaces, and each side surface of the pure water pipe 111 is provided with a pure water inlet 1111 communicated with the pipeline inside the pure water pipe 111; each waste water pipe 112 is arranged corresponding to the position of one side surface of the pure water pipe 111, and each waste water pipe 112 is provided with a pipeline communicated with the inner part of the waste water pipe 112. The side of each waste pipe 112 facing the side surface may be a flat surface to facilitate the penetration and winding of the reverse osmosis membrane module 120. Specifically, in this embodiment, N is 5, that is, the number of the waste water pipes 112 is 5, the cross section of the deionized water pipe 111 is substantially regular pentagonal, and has five side surfaces, and each waste water pipe 112 is disposed at a position corresponding to one of the side surfaces. The arrangement mode can ensure that each waste water pipe 112 individually corresponds to one side surface of the pure water pipe 111, and the waste water pipes do not interfere with each other when the film rolling operation is carried out, thereby facilitating the film rolling operation. In order to ensure that pure water produced by the ro membrane set 120 corresponding to each waste water pipe 112 can be collected into the pure water pipe 111 in time, a plurality of pure water inlet holes 1111 are formed in the surface of each side of the pure water pipe 111, and the pure water inlet holes 1111 are arranged at intervals along the length direction of the pure water pipe 111, so that pure water at each position of the pure water pipe 111 can rapidly flow into the pure water pipe 111 through the pure water inlet holes 1111. In order to discharge the waste water in time, a plurality of internal passage waste water inlet holes 1121 communicated with the waste water pipe 112 are formed in each waste water pipe 112 at intervals, and the plurality of waste water inlet holes 1121 are uniformly arranged along the length direction of the waste water pipe 112, so that the waste water at each position of the waste water pipe 112 can flow into the waste water pipe 112 through the waste water inlet holes 1121, and the waste water is discharged conveniently.

For the convenience of the film rolling operation, the plain water pipe 111 and the plurality of waste water pipes 112 may be arranged to be combined together to form a cylinder; when the membrane is rolled, the central tube group 110 rotates uniformly, so that the central tube group is not easy to deflect, and the appearance of the rolled finished product is uniform, so that the rolled finished product is convenient to install into the shell of the reverse osmosis membrane element 100, and the alignment and sealing of the end cover of the reverse osmosis membrane element 100 and the rolled finished product are also convenient.

Referring to fig. 3, in the present embodiment, the cover body 220 includes a top wall 221 and a cover edge 222 extending from the periphery of the top wall 221 to the bottle body 210, the cover edge 222 is hermetically connected to the bottle body 210 to realize sealing of the housing, the inner surface of the top wall 221 is convexly provided with a first annular rib 223, the inner peripheral wall of the first annular rib 223 is surrounded to form the pure water chamber, and the pure water chamber can be formed by the first annular rib 223 arranged in an annular shape. The first end cap 130 is convexly provided with a first extending pipe 132 extending into the deionized water pipe 111 and communicating with the deionized water pipe 111 on the surface facing the deionized water pipe 111, the first end cap 130 is butted with the deionized water pipe 111 through the first extending pipe 132 and can position the deionized water pipe 111, the first end cap 130 is provided with a first connecting pipe 133 on the surface facing the cap body 220, the first extending pipe 132 is communicated with the first connecting pipe 133, pure water is reliably led out from the deionized water pipe 111 through the first extending pipe 132 and the first connecting pipe 133, the first connecting pipe 133 extends into the pure water chamber and is in sealing abutment with the first annular rib 223, the first connecting pipe 133 forms the pure water outlet 131 facing the mouth of the cap body 220, after the first connecting pipe 133 is in sealing connection with the first annular rib 223, pure water can flow from the deionized water pipe 111 to the first cap body 220 and then flow into the pure water chamber, the whole pure water flow path is sealed independently. Meanwhile, the first end cover 130 can be further provided with a first positioning protrusion extending into the wastewater pipe to position the central pipe group, which is beneficial to improving the structural reliability of the membrane element 100.

As shown in fig. 3, in this embodiment, a second annular rib 211 is protruded from the bottom of the bottle body 210, an inner peripheral wall of the second annular rib 211 is surrounded to form the waste water chamber, an outer peripheral wall of the second annular rib 211 and a side portion of the bottle body 210 are surrounded together to form the raw water chamber, and the waste water chamber and the raw water chamber can be formed by the second annular rib 211 arranged annularly, so that the bottle body 210 has a simple structure and is convenient to produce and manufacture; the second end cap 140 is provided with a plurality of second protruding tubes 142 protruding toward the surface of the waste pipe 112, and each second protruding tube 142 protrudes into one waste pipe 112 and communicates with the waste pipe 112, so that the second end cap 140 is butted with the waste pipe 112 and can position the waste pipe 112, the surface of the second end cap 140 facing the cover 220 is provided with a second connecting pipe 143, the plurality of second protruding tubes 142 are all communicated with the second connecting pipe 143, waste water collected by each waste pipe 112 flows into the second connecting pipe 143 through the corresponding second protruding tube 142 and is collected in the second connecting pipe 143, the second connecting pipe 143 protrudes into the waste water cavity and is in sealed abutment with the second annular rib 211, the pipe orifice of the second connecting pipe 143 facing the bottom of the bottle body 210 forms the waste water outlet 141, and after the second connecting pipe 143 is in sealed connection with the second annular rib 211, the waste water can flow from the pure water pipe 111 to the second cover 220 and then flow into the waste water chamber, and the whole waste water flow path is independently sealed, so that the raw water cannot be polluted by the inflow of the raw water. Meanwhile, the second end cap 140 can be provided with a second positioning protrusion extending into the pure water pipe to position the central pipe group, which is beneficial to improving the structural reliability of the membrane element 100.

In order to separate pure water and waste water more smoothly, referring to fig. 6, in this embodiment, each of the ro membrane units 120 has a first portion located inside the central tube group 110 and a second portion located outside the central tube group 110, and each of the waste water tubes 112 and the pure water tube 111 is separated by the first portion of one of the ro membrane units 120; a second plurality of the ro membrane modules 120 are positioned around the center tube bank 110. The first part of the reverse osmosis membrane set 120 separates the pure water pipe 111 from the waste water pipe 112, which is beneficial for the pure water pipe 111 and the waste water pipe 112 to receive pure water and waste water respectively, the second part of the reverse osmosis membrane set 120 is wound around the central pipe set 110 to form an annular water flow channel, and water flows through and is separated from the pure water through the reverse osmosis membrane, so that the pure water and the waste water can be distinguished, and the water purification effect is ensured.

Referring to fig. 6, each of the reverse osmosis membrane modules 120 includes a reverse osmosis membrane 121, a water inlet flow guiding net 122 and a pure water flow guiding net 123; the water inlet flow guide network 122 and the pure water flow guide network 123 are respectively arranged on the front and back surfaces of the reverse osmosis membrane 121, raw water flows on the front surface of the reverse osmosis membrane 121, pure water permeates from the front surface of the reverse osmosis membrane 121 to the back surface of the reverse osmosis membrane 121 under the action of osmotic pressure, and pure water is generated on the back surface of the reverse osmosis membrane 121 and flows to the pure water pipe 111 under the flow guide action of the pure water flow guide network 123. The reverse osmosis membrane 121 can be folded to enable the front surface to be adjacent to the front surface and the back surface to be adjacent to the back surface, so that unnecessary contact is avoided, and pure water is prevented from being polluted; in actual operation, the reverse osmosis membrane 121 can be folded inwards at the front or at the back when folded, and the reverse osmosis membrane can be selected reasonably according to actual conditions. In this embodiment, the reverse osmosis membrane 121 of each reverse osmosis membrane group 120 is folded inwards in front, and the second parts of the reverse osmosis membrane groups 120 are overlapped and wound around the central tube group 110 together along the circumferential direction; a water inlet flow passage is formed between the front interlayers of the same reverse osmosis membrane 121; a water production flow channel is formed between the reverse side interlayers of two adjacent reverse osmosis membranes 121; the water inlet diversion net 122 and the waste water pipe 112 are positioned in the water inlet runner, and the pure water diversion net 123 is positioned in the water production runner. At this time, the water inlet flow channel and the water production flow channel are independent and thoroughly isolated from each other, so that the water inlet flow guide net 122 of each reverse osmosis membrane group 120 can be effectively ensured not to contact with the pure water pipe 111 and the reverse sides of the reverse osmosis membranes 121 of the other reverse osmosis membrane groups 120; the pure water diversion net 123 of each reverse osmosis membrane group 120 is not in contact with the waste water pipe 112 and the front surfaces of the reverse osmosis membrane sheets 121 of the other reverse osmosis membrane groups 120; raw water only flows in the water inlet flow passage and is finally discharged by the waste water pipe 112, and pure water only flows in the water production flow passage and is finally discharged by the pure water pipe 111, so that the pollution of the pure water is avoided, and the purification effect is ensured. In order to smoothly lead out the pure water, in this embodiment, the water generating flow passage may be sealed and closed except for the side near the pure water pipe 111, so that the water generating flow passage has only the pure water outlet toward the pure water pipe 111; at the moment, the water producing flow channel forms a membrane bag with three sealed sides and one opened side, the opening of the membrane bag faces to the pure water pipe 111, and the pure water in the membrane bag is limited to only flow towards the pure water pipe 111; the raw water produces pure water after the action of the reverse osmosis membrane 121, and the pure water is formed in the membrane bag and flows into the bag opening to enter the pure water pipe 111.

Referring to fig. 7, as will be understood with reference to fig. 1 and 3, the present invention further provides a reverse osmosis water purification system, which includes a water inlet pipeline 600, a pure water pipeline 700, a waste water pipeline 800, and a reverse osmosis filter element 900, wherein the specific structure of the reverse osmosis filter element 900 refers to the above embodiments, and since the reverse osmosis water purification system adopts all technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are also provided, and are not repeated herein. The water inlet pipeline 600 is communicated with the raw water cavity of the bottle body 210 of the reverse osmosis filter element 900, the pure water pipeline 700 is communicated with the pure water cavity of the cover body 220 of the reverse osmosis filter element 900, and the waste water pipeline 800 is communicated with the waste water cavity of the bottle body 210 of the reverse osmosis filter element 900. Raw water flows into the raw water chamber from the water inlet pipe 600, and finally flows between the housing 200 and the side surface of the membrane element 100 to realize side-stream water inflow, the raw water flows and permeates under the action of osmotic pressure to generate pure water, the wastewater flows into the wastewater chamber at the bottom of the bottle body 210 and then flows into the wastewater pipe 800 to be discharged, and the raw water flows into the pure water chamber of the pure water pipe to flow into the pure water chamber of the cover body 220 and then flows into the pure water pipe to be delivered to a user.

Referring to fig. 7, the water inlet pipeline 600 is sequentially provided with a pre-composite filter element 610, a water inlet valve 620 and a booster pump 630 along the water inlet direction; the pure water pipeline 700 is sequentially provided with a rear granular carbon filter element 710, a one-way valve 720 and a high-pressure switch 730 along the water outlet direction, and the waste water pipeline 800 is provided with a waste water valve 810; the reverse osmosis water purification system further comprises a water outlet device 500, and the water outlet device 500 is communicated with the pipe orifice of the pure water pipeline far away from the reverse osmosis filter element 900. The water inlet pipe 600 is connected to an external water source, the booster pump 630 provides power for water flow, so that raw water is purified by the reverse osmosis filter 900 under the action of pressure, and in order to control the size of the water flow, the water inlet valve 620 is generally disposed on the water inlet pipe 600, and the water inlet valve 620 may be an electromagnetic valve. In this embodiment, the water inlet pipeline 600 is further provided with a front composite filter element 610; the water outlet of the front composite filter element 610 is communicated with the water inlet of the water inlet valve 620. Leading composite filter 610 generally includes polypropylene fiber filter layer and active carbon filter layer, and it can filter the large granule impurity and some coloured impurity of aquatic, avoids original papers such as impurity damage water intaking valve 620, booster pump 630 and reverse osmosis filter core 900 of aquatic to effectively improve this reverse osmosis water purification system's life. The raw water is purified by the reverse osmosis filter 900 to generate pure water and wastewater, wherein the pure water is output to the user through the pure water pipeline. In order to avoid backflow of pure water, in this embodiment, a check valve 720 and a high-pressure switch 730 are disposed on the pure water pipeline 700, and the check valve 720 is connected in series between the high-pressure switch 730 and the pure water outlet; through setting up check valve 720 and high-voltage switch 730, supplementary pure water goes out water, avoids the pure water refluence. In order to further improve the water outlet quality, a post-granular carbon filter element 710 can be arranged on the pure water pipeline 800; the rear granular carbon filter element 710 is connected in series between the check valve 720 and the pure water outlet, and is used for further filtering the flowing pure water to filter out granular impurities and some colored impurities in the water. The water outlet device 500 is communicated with one end of the pure water pipeline 700 far away from the reverse osmosis filter element 900; the user directly operates and receives water on the water outlet device 500; the water outlet device 500 is generally a faucet, and in this embodiment, the water outlet device 500 is a UV sterilization faucet, which can sterilize and disinfect pure water, thereby improving the safety and sanitation of pure water.

The invention also provides a reverse osmosis water purifier, which comprises a reverse osmosis water purification system, wherein the specific structure of the reverse osmosis water purification system refers to the embodiments, and the reverse osmosis water purifier adopts all technical schemes of all the embodiments, so that the reverse osmosis water purifier also has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated.

It should be noted that the technical solutions of the embodiments of the present invention can be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should be considered to be absent and not to be within the protection scope of the present invention.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.

Claims

1. A reverse osmosis cartridge, comprising:

the membrane element comprises a membrane element and a membrane, wherein the membrane element is arranged in the shell; the cover body is in butt joint with the first end cover, the cover body is provided with a pure water cavity communicated with an external water path, and the pure water cavity is in sealed communication with the pure water outlet; the bottle body is butted with the second end cover, the bottle body is provided with a raw water cavity and a waste water cavity which are respectively communicated with an external water channel, the raw water cavity is communicated with a gap between the membrane element and the bottle body, and the waste water cavity is hermetically communicated with the waste water outlet;

each of said RO membrane units having a first portion located inside said central tube group and a second portion located outside said central tube group, each of said waste water pipe and said plain water pipe being separated by a first portion of one of said RO membrane units; a second plurality of said sets of reverse osmosis membranes surrounding said central tube set;

each reverse osmosis membrane group comprises a reverse osmosis membrane, a water inlet diversion net and a pure water diversion net;

the front surface of the reverse osmosis membrane of each reverse osmosis membrane group is folded inwards, and the second parts of the reverse osmosis membrane groups are overlapped and wound onto the central pipe group along the circumferential direction of the central pipe group together; a water inlet flow passage is formed between the interlayers on the front sides of the same reverse osmosis membrane; a water production flow channel is formed between the reverse side interlayers of two adjacent reverse osmosis membranes; the water inlet flow guide net and the waste water pipe are positioned in the water inlet flow passage, and the pure water flow guide net is positioned in the water production flow passage;

the other sides of the water production flow channel except the side close to the pure water pipe are closed and sealed.

2. The reverse osmosis filter cartridge of claim 1, wherein an end of the pure water pipe remote from the pure water discharge port is blocked to allow pure water to flow toward the pure water discharge port; and/or the presence of a gas in the gas,

the end of the waste pipe remote from the waste water discharge port is blocked to allow waste water to flow toward the waste water discharge port.

3. The reverse osmosis filter cartridge of claim 1, wherein the number of waste pipes is N, and N is greater than or equal to 3;

the cross section of the pure water pipe is arranged in an N-edge shape and correspondingly provided with N side surfaces, and each side surface is provided with a pure water inlet hole communicated with an internal pipeline of the pure water pipe;

each waste water pipe is arranged corresponding to the position of one side surface of the pure water pipe.

4. The reverse osmosis filter cartridge of claim 1, wherein the cover comprises a top wall and a cover rim extending from the periphery of the top wall to the bottle body, a first annular rib is protruded from the inner surface of the top wall, and the inner peripheral wall of the first annular rib is surrounded to form the pure water chamber;

the first end cover is provided with a first extending pipe which extends into the pure water pipe and is communicated with the pure water pipe in a protruding mode on the surface, facing the pure water pipe, of the first end cover, a first connecting pipe which is communicated with the first extending pipe is arranged on the surface, facing the cover body, of the first end cover, the first connecting pipe extends into the pure water cavity and is in sealing butt joint with the first annular rib, and the first connecting pipe faces the pipe opening of the cover body to form the pure water outlet.

5. The reverse osmosis filter element of claim 1, wherein a second annular rib is protruded from the bottom of the bottle body, an inner peripheral wall of the second annular rib is arranged to surround the waste water chamber, and an outer peripheral wall of the second annular rib and a side portion of the bottle body are arranged to surround the raw water chamber;

6. A reverse osmosis water purification system comprising a water inlet line, a plain water line, a waste water line and a reverse osmosis cartridge according to any one of claims 1 to 5; the water inlet pipeline is communicated with the raw water cavity of the bottle body, the pure water pipeline is communicated with the pure water cavity of the cover body, and the waste water pipeline is communicated with the waste water cavity of the bottle body.

7. The reverse osmosis water purification system of claim 6, wherein the water inlet pipeline is provided with a pre-composite filter element, a water inlet valve and a booster pump in sequence along the water inlet direction; the pure water pipeline is sequentially provided with a rear granular carbon filter element, a one-way valve and a high-pressure switch along the water outlet direction, and the waste water pipeline is provided with a waste water valve; the reverse osmosis water purification system further comprises a water outlet device, and the water outlet device is communicated with the pipe orifice of the pure water pipeline far away from the reverse osmosis filter element.

8. A reverse osmosis water purifier comprising the reverse osmosis water purification system of claim 6 or 7.