WO2019020030A1 - Reverse osmosis membrane component and water purifier - Google Patents

Abstract

A reverse osmosis membrane component (100) and a water purifier. The reverse osmosis membrane component (100) comprises a housing (10) having at one extremity a purified water outlet (11) and a wastewater water outlet (12) and having at the other extremity a raw water inlet (13); a center pipe component (20) mounted within the housing (10) and comprising a center pipe (21) and a reverse osmosis membrane group (22) wrapped on the center pipe (21) in the circumferential direction of the center pipe (21), the center pipe (21) being connected to the purified water outlet (11), the extremity of the reverse osmosis membrane group (22) in proximity to the raw water inlet (13) being used for water inflow, the extremity of the reverse osmosis membrane group (22) in proximity to the wastewater outlet (12) being used for water outflow; and a diversion structure (30) provided within the housing (10) and arranged in proximity to the raw water inlet (13), the diversion structure (30) being used for guiding the water entering the housing (10) from the raw water inlet (13) to flow in the radial direction of the raw water inlet (13).

Description

 Reverse osmosis membrane element and water purifier

Technical field

The present application relates to the field of water purification technology, and in particular to a reverse osmosis membrane element and a water purifier.

Background technique

The problem of drinking water is a matter of great concern to the people. It is an indisputable fact that there are many unhealthy substances in the water. This is the main reason for the healthy drinking water awareness of the people, and it is also the reason for the hot water purification equipment market.

The core component of the existing water purification equipment is a reverse osmosis membrane element. Usually, the reverse osmosis membrane element comprises a casing and a reverse osmosis membrane group. When the external raw water enters the casing through the raw water inlet on the casing, the reverse osmosis membrane group The amount of water passing through the raw water inlet position is greater than the amount of water flowing from the reverse osmosis membrane group away from the raw water inlet position, resulting in uneven water in the reverse osmosis membrane group, which not only affects the filtration efficiency of the reverse osmosis membrane group, but also shortens The service life of the reverse osmosis membrane group.

Application content

The main object of the present application is to propose a reverse osmosis membrane element which aims to make the reverse osmosis membrane group of the reverse osmosis membrane element uniform in water to improve the utilization rate of the reverse osmosis membrane group.

In order to achieve the above object, a reverse osmosis membrane element proposed by the present application comprises:

The shell has a pure water discharge port and a waste water discharge port at one end, and a raw water inlet at the other end;

a central tube assembly mounted in the housing, the central tube set including a central tube and a reverse osmosis membrane group wound on the central tube along a circumferential direction of the central tube, the central tube and the pure The water discharge port is connected to be connected, and one end of the reverse osmosis membrane group adjacent to the raw water inlet is used for water inlet, and one end of the reverse osmosis membrane group adjacent to the waste water discharge port is used for drainage;

The flow guiding structure is disposed in the casing and adjacent to the raw water inlet, and the flow guiding structure is configured to guide water flowing from the raw water inlet into the casing to flow in a radial direction of the raw water inlet.

Optionally, a plurality of guiding ribs extending along a radial direction of the raw water inlet are protruded from an inner wall surface of the raw water inlet of the casing, and a plurality of the guiding ribs are circumferentially along the raw water inlet Interval arrangement;

The reverse osmosis membrane element is further provided with a water deflector facing the raw water inlet and spaced apart from the casing;

A plurality of the flow guiding ribs and the water deflector together constitute the flow guiding structure.

Optionally, a plurality of the guiding ribs are recessed in a clockwise or counterclockwise direction and arranged in an arc shape.

Optionally, a plurality of the flow guiding ribs are evenly distributed along the circumferential direction of the raw water inlet.

Optionally, the side wall of the central pipe adjacent to one end of the raw water inlet penetrates a plurality of water passing holes distributed along a circumferential direction thereof;

The water retaining plate is disposed at an end of the central pipe adjacent to the raw water inlet, and blocks a plurality of the water passing holes and the pure water passage of the central pipe;

A plurality of the guiding ribs are adjacent to one end of the raw water inlet to form a slot, and the slot is for inserting and mating with one end of the central pipe adjacent to the raw water inlet.

Optionally, a plurality of the flow guiding ribs are integrally formed with the housing.

Optionally, the flow guiding structure is a baffle that separates the reverse osmosis membrane group from the raw water inlet and is spaced apart from the raw water inlet, and the baffle has a positive water inlet a water blocking area, and a water passing area outside the water blocking area, the water passing area is provided with a plurality of through holes, and the density of the through holes is from an inner side of the water passing area to the water passing area The outer side gradually increases.

Optionally, the through hole diameter of the water passing region gradually increases from an inner side of the water passing region to an outer side of the water passing region.

Optionally, the flow guiding structure is a baffle that separates the reverse osmosis membrane group from the raw water inlet and is spaced apart from the raw water inlet, and the water deflecting plate has a raw water inlet a water retaining region, and a water passing region located outside the water retaining region, wherein the water passing region is provided with a plurality of inner sides extending from the inner side of the water passing region to the outer side of the water passing region, and along the Fan-shaped holes arranged in the circumferential direction of the flap.

The present application also provides a water purifier comprising a reverse osmosis membrane element, the reverse osmosis membrane element comprising:

a casing is disposed in a cylindrical shape, one end of the casing is provided with a pure water discharge port and a waste water discharge port, and the other end of the casing is provided with a raw water inlet;

a central tube assembly mounted in the housing, the central tube set including a central tube and a reverse osmosis membrane group wound on the central tube along a circumferential direction of the central tube, the central tube and the pure The water discharge port is connected to be connected, and one end of the reverse osmosis membrane group adjacent to the raw water inlet is used for water inlet, and one end of the reverse osmosis membrane group adjacent to the waste water discharge port is used for drainage;

The flow guiding structure is disposed in the casing and adjacent to the raw water inlet, and the flow guiding structure is configured to guide water flowing from the raw water inlet into the casing to flow in a radial direction of the raw water inlet.

The technical solution of the present application provides a flow guiding structure in the casing of the reverse osmosis membrane element, and the diversion structure is disposed in the casing and adjacent to the raw water inlet. When the reverse osmosis membrane element performs the filtering work, the external raw water enters the shell through the raw water inlet. In the body, the raw water entering the casing flows under the diversion of the diversion structure from the raw water inlet in the radial direction of the raw water inlet away from the raw water inlet, which ensures that the reverse osmosis membrane group is adjacent to the end of the raw water inlet. The water inlet is even, so that the reverse osmosis membrane group is fully utilized, which not only improves the filtration efficiency of the reverse osmosis membrane group, but also prevents the reverse osmosis membrane group from being too short due to its excessive concentration of water. The problem arises.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the structures shown in the drawings without any creative work for those skilled in the art.

1 is a schematic structural view of an embodiment of a reverse osmosis membrane element of the present application;

Figure 2 is a schematic structural view of the end cap of Figure 1;

3 is a schematic structural view of another embodiment of a flow guiding structure of the present application;

4 is a schematic structural view of still another embodiment of a flow guiding structure of the present application.

Description of the reference numerals:

Label	name	Label	name
100	Reverse osmosis membrane element	31	Guide rib
10	case	32	Flap
20	Central tube assembly	212	Water hole
30 or 30 ́ or 30 ́ ́	Diversion structure	40	Slot
11	Pure water discharge	31 ́	Baffle
12	Wastewater discharge	32 ́	Through hole
13	Raw water import	311 ́	Water retaining area
14	Side wall	312 ́	Water area
15	End cap	31 ́ ́	Baffle
twenty one	Central tube	32 ́ ́	Fan hole
211	Inlet hole	311 ́ ́	Water retaining area
twenty two	Reverse osmosis membrane group	312 ́ ́	Water area

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present application, the directional indication is only used to explain in a certain posture (as shown in the drawing) The relative positional relationship between the components, the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is used for descriptive purposes only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. Nor is it within the scope of protection required by this application.

The present application provides a reverse osmosis membrane element. Please refer to FIG. 1. FIG. 1 is a schematic structural view of an embodiment of a reverse osmosis membrane element of the present application.

The reverse osmosis membrane element 100 is used in a water purifier for producing pure water. The reverse osmosis membrane element 100 includes a housing 10, a central tube assembly 20, and a flow guiding structure 30.

One end of the casing 10 is provided with a pure water discharge port 11 and a waste water discharge port 12, and the other opposite end of the casing 10 is provided with a raw water inlet 13. Specifically, the housing 10 includes a bottom case 14 that is open at one end, and an end cover 15 that covers the bottom case 14; a pure water discharge port 11 and a waste water discharge port 12 are opened at the bottom of the bottom case 14, and the raw water inlet 13 is opened at the end. Cover 15 on. In view of the fact that the central tube assembly 20 needs to be mounted into the housing 10, the end cap 15 is detachably coupled to the bottom housing 14, thus facilitating the mounting of the central tube assembly 20 of the reverse osmosis membrane element 100 within the housing 10.

The center tube assembly 20 is mounted in the housing 10 and includes a central tube 21 and a reverse osmosis membrane group 22 wound around the circumference of the central tube 21 to the outside of the central tube 21, the central tube 21 and the pure water on the housing 10. The discharge port 11 is in communication. The reverse osmosis membrane group 22 is adjacent to one end of the raw water inlet 13 for influent water, and the reverse osmosis membrane group 22 is adjacent to one end of the waste water discharge port 12 for drainage.

Specifically, the central pipe 21 is open at one end and communicates with the pure water discharge port 11 on the casing 10. The other end of the central pipe 21 is blocked, that is, the other end of the central pipe 21 can pass through the casing. 10 is sealed and sealed, and it can also be sealed by providing a partition plate, and the manner in which one end of the center pipe 21 is sealed is not specifically limited. Further, the pipe wall of the center pipe 21 is further provided with a water inlet hole 211 so that water outside the center pipe 21 can enter the center pipe 21 and be discharged through the center pipe 21.

The reverse osmosis membrane group 22 includes a reverse osmosis membrane sheet. When the reverse osmosis membrane group 22 is wound onto the central tube 21, the front surface of the reverse osmosis membrane sheet is folded in half at one end thereof and bypassed the center tube 21, and is folded in half. The front surface of the reverse osmosis membrane forms a pure water passage communicating only with the center tube 21 under the adhesion of the waterproof glue; the reverse reverse osmosis membrane is wound around the center tube 21 to the outside of the center tube 21 The spiral arrangement is such that the reverse osmosis membrane is surrounded by two layers to form a water inlet passage. Since the reverse side of the reverse osmosis membrane is not sealed by the waterproof glue, the inlet passage is adjacent to the raw water inlet. 13 and both sides of the waste water discharge port 12 are openly disposed such that one end of the reverse osmosis membrane adjacent to the raw water inlet 13 is used for water intake, and the reverse osmosis membrane is adjacent to one end of the waste water discharge port 12 for drainage.

In order to ensure the water flow velocity in the pure water passage and the water inlet passage, the reverse osmosis membrane group 22 further includes a pure water guide cloth and a water inlet grid, wherein the pure water guide cloth is installed in the pure water passage, and the water inlet grid is installed. In the water inlet channel. Since the pure water guide cloth and the water inlet grid have a certain thickness, the pure water guide cloth installed in the pure water passage can set the front surface of the reverse-reverse reverse osmosis membrane to ensure the inside of the pure water passage. The water flow velocity; for the same reason, the water inlet grid installed in the water inlet passage can arrange the adjacent two layers of the spiral reverse osmosis membrane, thereby ensuring the water flow velocity in the water inlet passage.

It should be noted that the external raw water enters the casing 10 only through the raw water inlet 13 , which makes the water flow in the position of the casing 10 adjacent to the raw water inlet 13 not only large, but also the water flow rate is relatively fast; that is, through The raw water inlet 13 enters the raw water in the casing 10, and most of it flows through the reverse osmosis membrane group 22 through the reverse osmosis membrane group 22, which causes the reverse osmosis membrane group 22 to flow away from the original water outlet. The position of the water is relatively small, resulting in uneven water in the reverse osmosis membrane group 22, which not only affects the filtration efficiency of the reverse osmosis membrane group 22, but also shortens the service life of the reverse osmosis membrane group 22.

In view of the above problem, in the embodiment of the present application, the housing 10 is further provided with a flow guiding structure 30, which is disposed adjacent to the raw water inlet 13 and is mainly used for guiding through the raw water inlet 13 into the shell. The water in the body 10 flows in the radial direction of the raw water inlet 13.

When the reverse osmosis membrane element 100 performs the filtering operation, the external raw water enters the casing 10 through the raw water inlet 13, and the raw water entering the casing 10 is guided by the flow guiding structure 30, and the raw water inlet 13 is along the raw water. The radial direction of the inlet 13 flows away from the raw water inlet 13, which ensures that the reverse osmosis membrane group 22 is uniformly distributed adjacent to the end of the raw water inlet 13, thereby making full use of the reverse osmosis membrane group 22, which not only improves The filtration efficiency of the reverse osmosis membrane group 22 can also avoid the problem that the reverse osmosis membrane group 22 has a short life due to its excessive concentration of water.

In an embodiment of the present application, the flow guiding structure 30 is composed of a plurality of flow guiding ribs 31 and a water deflecting plate 32. The plurality of guiding ribs 31 are disposed on the inner wall surface of the casing 10, and optionally, a plurality of guiding ribs 31 are disposed on the inner surface of the end cover 15, and the plurality of guiding ribs 31 are along the raw water. The radial extension of the inlet 13 and the plurality of guiding ribs 31 are also spaced along the circumferential direction of the raw water inlet 13 , so that the adjacent two guiding ribs 31 are enclosed with the casing 10 to form a guiding groove. The guide trough is mainly used to guide the raw water to flow from the raw water inlet 13 to the direction away from the raw water inlet 13.

The water baffle 32 is disposed in the casing 10, and is disposed opposite to the raw water inlet 13 and spaced apart from the casing 10, and is mainly used for blocking raw water entering from the raw water inlet into the casing 10 to avoid entering through the raw water inlet. The raw water in the casing 10 flows straight to the reverse osmosis membrane group 22.

When the raw water enters the casing 10 from the raw water inlet 13 , the raw water is blocked by the water retaining plate 32 and flows along the radial direction of the raw water inlet 13 , and the raw water is formed around the adjacent two guiding ribs 31 and the casing 10 . The guide groove is guided to flow away from the raw water inlet 13 so as to prevent the raw water entering the casing 10 from the raw water inlet 13 from flowing straight to the reverse osmosis membrane group 22, so that the reverse osmosis membrane The group 22 is only partially involved in the filtration, which in turn leads to problems of low filtration efficiency and short service life of the reverse osmosis membrane group 22.

It should be noted that the water baffle 32 may be fixed to one side of the plurality of guiding ribs 31 adjacent to the reverse osmosis membrane group 22, or may be fixedly mounted in the housing 10 through other connecting members, where the water retaining plate is fixed. 32 How to fix the installation without specific restrictions.

In an embodiment, further, the plurality of flow guiding ribs 31 are each recessed in a clockwise or counterclockwise direction and arranged in an arc shape. Specifically, referring to FIG. 2 , in the embodiment of the present application, the plurality of guiding ribs 31 are all recessed in a clockwise direction, so that the adjacent two guiding ribs 31 are formed together with the casing 10 . The deflector also curves in a clockwise direction. When the raw water flows along the flow guiding groove, the raw water not only has a radial flow velocity along the raw water inlet 13, but also has a flow velocity in the circumferential direction of the raw water inlet 13; that is, the raw water entering the casing 10 is The swirling flow is formed by the flow of the plurality of guiding ribs 31. This allows the raw water entering the water inlet passage of the reverse osmosis membrane group 22 to have not only the velocity of flow along the axial direction of the reverse osmosis membrane group 22, but also the velocity of flow along the extending direction of the water inlet passage; It is said that the raw water in the water inlet channel of the reverse osmosis membrane group 22 also forms a swirling effect, and impurities and stagnation substances retained in the water inlet passage are more easily punched out of the water inlet passage under the action of the swirling raw water, so that The reverse osmosis membrane group 22 is prevented from being clogged by impurities and impurities retained in the water inlet passage, thereby facilitating the extension of the service life of the reverse osmosis membrane membrane group, that is, extending the service life of the reverse osmosis membrane element 100.

In an embodiment, further, the plurality of guiding ribs 31 are uniformly distributed along the circumferential direction of the raw water inlet 13 , that is, the spacing between any adjacent two guiding ribs 31 is uniform, that is, any two adjacent ones. The guide rib 31 is equivalent in size to the guide groove formed around the casing 10. This allows the raw water blocked by the water deflector 32 to flow uniformly around the raw water inlet 13 under the diversion of the plurality of flow guiding ribs 31, thereby causing the reverse osmosis membrane group 22 to be adjacent to one end of the raw water inlet 13 Both can enter the water, and the amount of influent water is equivalent, thus ensuring that the reverse osmosis membrane group 22 can filter the raw water everywhere, thereby ensuring the filtration efficiency and the service life of the reverse osmosis membrane group 22.

It should be noted that the central tube 21 is disposed adjacent to the end of the raw water inlet 13 and protrudes from the reverse osmosis membrane group 22, that is, when the central tube assembly 20 is installed in the housing 10, the central tube 21 is adjacent to one end of the raw water inlet 13 and The housing 10 abuts such that the reverse osmosis membrane group 22 has a gap between the original nozzles. Considering the positioning between the central tube 21 and the housing 10, in an embodiment of the present application, referring to FIG. 2, a plurality of guiding ribs 31 are disposed adjacent to one end of the raw water inlet 13 to form a slot 40. The size of the slot 40 is comparable to the size of the center tube 21, which allows the center tube 21 to be fixedly coupled to the housing 10 by being inserted into the slot 40.

However, when the center tube 21 is inserted into the slot 40, the center tube 21 is directly in communication with the raw water inlet 13, which causes the raw water to be discharged from the center tube 21 without being filtered. Considering the above problem, please refer to FIG. The side wall 14 of the central pipe 21 adjacent to one end of the raw water inlet 13 penetrates through a plurality of water passing holes 212 distributed along the circumferential direction thereof; at the same time, the water retaining plate 32 spaced apart from the raw water inlet 13 is installed in the center pipe 21, and the block The water plate 32 also partitions the plurality of water passing holes 212 on the center pipe 21 from the pipes of the center pipe 21, thereby ensuring that the raw water entering the casing 10 from the raw water inlet 13 cannot directly enter the center pipe 21.

When the reverse osmosis membrane element 100 produces pure water, the external raw water enters the casing 10 through the raw water inlet 13 and flows along the axial direction of the center pipe 21, when the raw water is blocked by the water retaining plate 32 in the center pipe 21. After that, the raw water in the central pipe 21 can only flow to the periphery of the central pipe 21 through the plurality of water passing holes 212 on the central pipe 21, and the raw water flowing out of the central pipe 21 continues to move away under the action of the plurality of guiding ribs 31. The direction of the center tube 21 flows so that one end of the casing 10 adjacent to the raw water inlet 13 is filled with raw water, thereby ensuring uniformity of water entering the end of the reverse osmosis membrane group 22 adjacent to the raw water inlet 13.

It should be noted that the central tube 21 of the reverse osmosis membrane group 22 usually needs to be blocked at one end, and the water blocking plate 32 is disposed in the central tube 21, which not only facilitates the fixing of the water blocking plate 32, but also can cover the housing. The structure of 10 is simplified.

In the above embodiment, the plurality of flow guiding ribs 31 and the housing 10 are integrally formed. In this way, not only the connection strength between the guide rib 31 and the casing 10 is ensured, but also the strength of the guide rib 31 is ensured, thereby ensuring the guide rib 31 when the impact rib 31 is subjected to water impact. The position does not cause displacement, and the guide rib 31 does not suffer from deformation or being broken by the impact of water. In addition, the plurality of guiding ribs 31 are integrally formed with the casing 10, so that the plurality of guiding ribs 31 and the casing 10 can be formed by one-time opening of the mold, thereby shortening the production cycle of the entire reverse osmosis membrane element 100. Further, it is advantageous to increase the productivity of the reverse osmosis membrane element 100.

Obviously, in another embodiment of the present application, referring to FIG. 3, the flow guiding structure 30 ́ may also be formed by a baffle 31 ́ having a plurality of through holes 32 ́. Specifically, the baffle 31 ́ is installed in the casing 10 and the reverse osmosis membrane group 22 is spaced apart from the raw water inlet 13 , and the baffle 31 ́ is spaced apart from the raw water inlet 13 , which makes the inlet from the raw water The raw water entering the casing 10 is temporarily held between the casing 10 and the baffle 31 ́.

The water deflector 32 has a water retaining region 311 ́ disposed opposite the raw water inlet 13 and a water passing region 312 ́ located outside the water retaining region 311 ́; the water retaining region 311 ́ is not provided with a through hole 32 ́, which is mainly used for The water entering the casing 10 from the raw water inlet 13 is prevented from flowing straight to the reverse osmosis membrane group 22; the water passing region 312 ́ is provided with a plurality of through holes 32 ́, which are temporarily retained in the casing 10 and the baffle 31 ́ The raw water can pass through a plurality of through holes 32 ́ of the water passing region 312 ́ and enter the water inlet passage of the reverse osmosis membrane group 22 for filtration.

Since the raw water is blocked by the water retaining region 311 ́, it will flow along the circumferential direction of the raw water inlet 13 , and the water flow velocity near the raw water inlet 13 is greater than the water flow velocity away from the raw water inlet 13 , in order to ensure the reverse osmosis membrane group 22 The water inlet is uniform, and the through hole 32 ́ on the water passing area 312 ́ is gradually arranged from the inner side to the outer side, that is, the number of the through holes 32 ́ of the water passing area 312 ́ adjacent to the water blocking area 311 ́ is small. The number of through holes 32 ́ in the water passing area 312 ́ away from the water blocking area 311 ́ ensures that the amount of raw water passing through the water passing area 312 ́ is equivalent, thereby ensuring that the reverse osmosis diaphragm group 22 is adjacent to the baffle 31 ́ The water in the end is evenly distributed, thereby ensuring the filtration efficiency and service life of the reverse osmosis membrane group 22.

It should be noted that the size of the water retaining region 311 ́ is equivalent to the diameter of the central tube 21 . When the central tube assembly 20 is installed in the housing 10 , the central tube 21 is adjacent to the end of the baffle 31 ́ and the baffle 31 ́ The water retaining region 311 ́ abuts, and a gap is reserved between the end of the reverse osmosis membrane group 22 adjacent to the baffle 31 ́ and the baffle 31 ́, so that the purified water of the reverse osmosis membrane group 22 is facilitated.

In an embodiment, further, in order to ensure that the amount of raw water passing through the water passing area 312 ́ is equivalent, in an embodiment of the present application, the through hole 32 ́ aperture of the water passing area 312 ́ is from the water passing area The inner side gradually increases toward the outer side of the filter area. The closer to the water-blocking area 311 ́ by the water-passing area 312 ́, the larger the raw water flow rate is, and the farther the water-passing area 312 ́ is away from the water-blocking area 311 ́, the smaller the raw water flow rate is, and the through-hole is changed. 32 ́ aperture, which ensures that the amount of raw water passing through the water-passing area 312 ́ during the same period of time is equivalent, thus ensuring that the amount of water entering the end of the reverse osmosis membrane group 22 adjacent to the baffle 31 ́ is equivalent, thereby ensuring The filtration efficiency and service life of the reverse osmosis membrane group 22 are obtained.

In addition, in other embodiments of the present application, referring to FIG. 4, the flow guiding structure 30 may also be formed by a baffle 31 ́ ́ with a plurality of fan-shaped holes 32 ́ ́. Specifically, the baffle 31 ́ ́ is installed in the casing 10 and the reverse osmosis membrane group 22 is spaced apart from the raw water inlet 13 , and the baffle 31 ́ ́ is spaced apart from the raw water inlet 13 , which makes The raw water entering the casing 10 of the raw water inlet 13 is temporarily stored between the casing 10 and the baffle 31 ́ ́.

The water deflector 32 has a water retaining region 311 ́ ́ disposed opposite the raw water inlet 13 and a water passing region 312 ́ ́ located outside the water retaining region 311 ́ ́; the water retaining region 311 ́ ́ is not provided with a through hole 32 ́, It is mainly used for blocking the flow of water from the raw water inlet 13 into the casing 10 to the reverse osmosis membrane group 22; the water passage area 312 ́ ́ is provided with a plurality of fan-shaped holes 32 ́ arranged along the circumferential direction thereof. ́, the raw water temporarily retained between the casing 10 and the baffle 31 ́ ́ can pass through the plurality of through holes 32 ́ of the water passing area 312 ́ ́ and enter the water inlet passage of the reverse osmosis membrane group 22 for filtration. .

Since the raw water is blocked by the water retaining area 311 ́ ́, it will flow along the circumferential direction of the raw water inlet 13 , and the water flow velocity near the raw water inlet 13 position is greater than the water flow speed away from the raw water inlet 13 position, in order to ensure the reverse osmosis membrane group The inlet water of 22 is even, and the fan-shaped hole 32 ́ ́ is gradually widened from the inner side to the outer side of the water passing area 312 ́ ́, thus ensuring that the amount of raw water passing through the 312 ́ ́ area of the water passing area is equivalent, thereby ensuring The reverse osmosis membrane group 22 is uniformly distributed into the vicinity of the end of the baffle 31 ́ ́, thereby ensuring the filtration efficiency and service life of the reverse osmosis membrane group 22.

The present application also provides a water purifier comprising a reverse osmosis membrane element. The specific structure of the main reverse osmosis membrane element is referred to the above embodiment, and the present water purifier adopts all the technical solutions of all the above embodiments. Therefore, at least the technical effects brought about by the technical solutions of the foregoing embodiments are not repeatedly described herein.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the patent application, and the equivalent structural transformation, or direct/indirect use, of the present application and the contents of the drawings is used in the application of the present application. All other related technical fields are included in the patent protection scope of the present application.

Claims (20)

1.  A reverse osmosis membrane element, comprising:

   The shell has a pure water discharge port and a waste water discharge port at one end, and a raw water inlet at the other end;

   a central tube assembly mounted in the housing, the central tube set including a central tube and a reverse osmosis membrane group wound on the central tube along a circumferential direction of the central tube, the central tube and the pure The water discharge port is connected to be connected, and one end of the reverse osmosis membrane group adjacent to the raw water inlet is set as water inlet, and one end of the reverse osmosis membrane group adjacent to the waste water discharge port is arranged to be drained;

   The flow guiding structure is disposed in the casing and adjacent to the raw water inlet, and the guiding structure is configured to guide water flowing from the raw water inlet into the casing to flow along the radial direction of the raw water inlet.
2. The reverse osmosis membrane element according to claim 1, wherein said casing is convexly provided with a plurality of flow guiding ribs extending in a radial direction of said raw water inlet adjacent to an inner wall surface of said raw water inlet, and said plurality of said The guiding ribs are arranged along the circumferential direction of the raw water inlet;

   The reverse osmosis membrane element is further provided with a water deflector facing the raw water inlet and spaced apart from the casing;

   A plurality of the flow guiding ribs and the water deflector together constitute the flow guiding structure.
3. The reverse osmosis membrane element according to claim 2, wherein each of the plurality of flow guiding ribs is recessed in a clockwise or counterclockwise direction and arranged in an arc shape.
4. The reverse osmosis membrane element according to claim 2, wherein a plurality of said flow guiding ribs are uniformly distributed in the circumferential direction of said raw water inlet.
5. The reverse osmosis membrane element according to claim 2, wherein a side wall of the central tube adjacent to one end of the raw water inlet penetrates a plurality of water passing holes distributed along a circumferential direction thereof;

   The water retaining plate is disposed at an end of the central pipe adjacent to the raw water inlet, and blocks a plurality of the water passing holes and the pure water passage of the central pipe;

   A plurality of the guiding ribs are adjacent to one end of the raw water inlet to form a slot, and the slot is disposed to be mated with one end of the central pipe adjacent to the raw water inlet.
6. The reverse osmosis membrane element according to claim 1, wherein a plurality of the flow guiding ribs are integrally formed with the casing.
7. The reverse osmosis membrane element according to claim 1, wherein the flow guiding structure is a baffle that separates the reverse osmosis membrane group from the raw water inlet and is spaced apart from the raw water inlet, The baffle has a water retaining region facing the raw water inlet and a water passing region outside the water retaining region, the water passing region is provided with a plurality of through holes, and the density of the through holes is from the The inner side of the water region gradually increases toward the outer side of the water passing region.
8. The reverse osmosis membrane element according to claim 7, wherein a through-hole diameter of the water-passing region gradually increases from an inner side of the water-passing region to an outer side of the water-passing region.
9. The reverse osmosis membrane element according to claim 1, wherein the flow guiding structure is a baffle that separates the reverse osmosis membrane group from the raw water inlet and is spaced apart from the raw water inlet, The water baffle has a water retaining region disposed opposite to the raw water inlet, and a water passing region located outside the water retaining region, wherein the water passing region is provided with a plurality of from the inner side of the water passing region to the The outer side of the water region extends and is spaced apart in a circumferential direction along the flap.
10. The reverse osmosis membrane element according to claim 1, wherein a wall of the center tube is provided with a water inlet hole.
11. The reverse osmosis membrane element according to claim 1, wherein said reverse osmosis membrane group further comprises a pure water guide cloth and a water inlet grid, said pure water guide cloth being installed in said pure water passage, said said An inlet water grid is installed in the water inlet channel.
12. The reverse osmosis membrane element according to claim 1, wherein said casing comprises a bottom casing open at one end, and an end cap covering said bottom casing, said pure water discharge port and a waste water discharge port being opened at said The bottom of the bottom case, the raw water inlet is opened on the end cover.
13. The reverse osmosis membrane element according to claim 12, wherein said bottom case is detachably coupled to said end cap.
14. The reverse osmosis membrane element according to claim 1, wherein one end of said center tube extends from said reverse osmosis membrane group.
15. The reverse osmosis membrane element according to claim 9, wherein the size of the water retaining region is comparable to the diameter of the central tube.
16. The reverse osmosis membrane element according to claim 9, wherein an end of the center tube adjacent to the baffle abuts a water retaining region of the baffle, and the reverse osmosis membrane group is adjacent to the baffle A gap is reserved between the end of the baffle and the baffle.
17. A water purifier comprising a reverse osmosis membrane element, the reverse osmosis membrane element comprising:

    The shell has a pure water discharge port and a waste water discharge port at one end, and a raw water inlet at the other end;

    a central tube assembly mounted in the housing, the central tube set including a central tube and a reverse osmosis membrane group wound on the central tube along a circumferential direction of the central tube, the central tube and the pure The water discharge port is connected to be connected, and one end of the reverse osmosis membrane group adjacent to the raw water inlet is set as water inlet, and one end of the reverse osmosis membrane group adjacent to the waste water discharge port is arranged to be drained;

    The flow guiding structure is disposed in the casing and adjacent to the raw water inlet, and the guiding structure is configured to guide water flowing from the raw water inlet into the casing to flow along the radial direction of the raw water inlet.
18. A water purifier according to claim 17, wherein said housing is provided with a plurality of guide ribs extending in a radial direction of said raw water inlet adjacent to an inner wall surface of said raw water inlet, and said plurality of said guides The flow ribs are arranged along the circumferential direction of the raw water inlet;

    The reverse osmosis membrane element is further provided with a water deflector facing the raw water inlet and spaced apart from the casing;

    A plurality of the flow guiding ribs and the water deflector together constitute the flow guiding structure.
19. A water purifier according to claim 18, wherein a plurality of said flow guiding ribs are recessed in a clockwise or counterclockwise direction and arranged in an arc shape.
20. A water purifier according to claim 18, wherein a plurality of said flow guiding ribs are evenly distributed along the circumferential direction of said raw water inlet.