CN219376701U - Reverse osmosis membrane module and water purification device - Google Patents

Abstract

The utility model provides a reverse osmosis membrane component and a water purification device. The permeable membrane module includes a central tube and a membrane bag. One end of the center pipe has a clean water outlet. The film bag has opposite first end, second end and opposite first side and second side. The first end is connected to the outer periphery of the central tube and has an opening to communicate with the inner cavity of the central tube. The film bag is wound around the central tube from the first end. The second side is closer to the clean water outlet than the first side. One of the first side and the second side constitutes the raw water inlet, and the other constitutes the concentrated water outlet, so that the raw water enters the gap between the two adjacent rolls of the film bag through the raw water inlet, and the clean water penetrates into the film bag, so that the clean water enters the central tube and is discharged through the clean water outlet without infiltration The water constitutes concentrated water to be discharged through the concentrated water outlet. A plurality of water retaining strips are attached to the outer surface of the membrane bag to define a bending channel between the raw water inlet and the concentrated water outlet. The reverse osmosis membrane component of the utility model can increase the output of purified water and reduce the energy consumption of the water pump.

Description

Reverse osmosis membrane module and water purification device

technical field

The utility model relates to the technical field of water treatment devices, in particular to a reverse osmosis membrane module and a water purification device.

Background technique

Most of the current water purification devices use the principle of reverse osmosis to extract purified water. The reverse osmosis membrane element is a roll structure and consists of multi-sheet membrane bags. Each membrane bag is made of two pages of reverse osmosis membranes sealed with glue on the back. The three sides of the membranes are sealed, leaving only the only opening connecting the central tube. The opening of the membrane bag is sealed and connected with the central tube, and the membrane bag is rolled up in the same direction to form a reverse osmosis membrane. When the reverse osmosis membrane module is filtered, the raw water enters the gap between the adjacent winding layers of the membrane bag. Driven by the pressure, the filtered clean water penetrates the membrane surface into the inner cavity of the membrane bag, enters the central tube from the opening side of the membrane bag, and then discharges. The water that does not enter the film bag is concentrated water, and the concentrated water continues to flow out along the gap between the winding layers.

Most of the solutes in the raw water are intercepted by the osmotic membrane and accumulate on the high-pressure side surface of the osmotic membrane. With the accumulation of filtration time, a concentration gradient will be formed near the boundary layer, and the concentration near the membrane surface will be the largest. This concentration gradient is called the phenomenon of concentration polarization, which leads to a sharp drop in the output of purified water, and an increase in the transmembrane pressure difference, which increases the energy consumption of the water pump.

Utility model content

The purpose of the utility model is to provide a reverse osmosis membrane module and a corresponding water purification device which can increase the output of purified water and reduce the energy consumption of the water pump.

In order to achieve the above object, on the one hand, the utility model provides a reverse osmosis membrane assembly, which includes:

a center pipe having a clean water outlet at one end; and

a center pipe having a clean water outlet at one end; and

The film bag has opposite first ends, second ends, and opposite first sides and second sides. The first end is connected to the outer periphery of the central tube and has an opening to communicate with the inner cavity of the central tube. The film bag is wound around the central tube from the first end, and the second side is closer to the clean water outlet than the first side. One of the first side and the second side forms a raw water inlet, and the other forms a concentrated water outlet, so that raw water enters the gap between two adjacent rolls of the film bag through the raw water inlet, and infiltrates clean water into the film bag. Make clean water enter the central pipe and discharge through the clean water outlet, and the uninfiltrated water constitute concentrated water to be discharged through the concentrated water outlet;

A plurality of water retaining strips are attached to the outer surface of the membrane bag to define a bending channel between the raw water inlet and the concentrated water outlet.

Optionally, one of the water retaining strips extends along the edge of the first side and the second side constituting the raw water inlet, so as to shorten the raw water inlet.

Optionally, the plurality of water retaining strips are arranged at intervals along the length direction of the central pipe; and

Among every two adjacent water retaining strips, one extends from the central pipe, and the other extends from the second end toward the central pipe.

Optionally, the first side constitutes the raw water inlet;

The number of the water retaining strips is two, one of which extends from the central pipe along the first side, and the other extends from the middle of the second end toward the central pipe; or

There are two water retaining strips, one of which starts from the middle of the central tube and extends toward the second end, and the other starts from the second end and extends along the first side.

Optionally, there are three water retaining strips, one of which starts from the middle of the second end and extends toward the central pipe, and the other two respectively start from the central pipe and extend along the first side and the second side respectively.

Optionally, there are three water retaining strips, one of which extends from the middle of the central pipe toward the second end, and the other two respectively start from the second end and extend along the first side and the second side respectively.

Optionally, the number of the water retaining strips is five, two of which start from the second end and extend along the first side and the second side respectively; the two middle water retaining strips start from the central tube and extend toward the second end and are located between the first side and the second side, and the central one is located between the two central water retaining strips and extends from the center of the second end toward the central pipe.

Optionally, each of the water retaining strips has overlapping sections in the length direction.

Optionally, the water-retaining strip is a waterproof tape, which is pasted on the outer surface of the membrane bag.

On the other hand, the utility model also provides a water purification device, which comprises the reverse osmosis membrane module as described in any one of the above.

In the reverse osmosis membrane module of the utility model, a plurality of water retaining strips are attached to the outer surface of the membrane bag, and a bending channel is defined between the raw water inlet and the concentrated water outlet. In the process of water flowing from the raw water inlet to the concentrated water outlet, the water goes through a tortuous channel, the flow is longer and the turbulence effect is stronger, which can effectively alleviate the phenomenon of concentration polarization, thereby increasing the output of purified water and reducing the energy consumption of water pumps.

Furthermore, in the reverse osmosis membrane module of the present invention, a water retaining bar extends along the edge of the first side and the second side forming the raw water inlet, so as to shorten the raw water inlet, thereby increasing the initial velocity of the raw water inlet, thereby increasing the influent flow rate, and increasing the purified water output.

According to the following detailed description of specific embodiments of the utility model in conjunction with the accompanying drawings, those skilled in the art will be more aware of the above and other objectives, advantages and features of the utility model.

Description of drawings

Hereinafter, some specific embodiments of the present utility model will be described in detail in an exemplary rather than restrictive manner with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic diagram of a filter bottle shell of a water purification device according to an embodiment of the present invention;

Fig. 2 is a schematic sectional view of the assembly of the filter bottle housing and the reverse osmosis membrane module;

Fig. 3 is a schematic diagram of the development of the reverse osmosis membrane module of the first embodiment of the present invention;

Fig. 4 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 3 after the membrane bag is wound;

Fig. 5 is a schematic diagram of the expansion of the reverse osmosis membrane module of the second embodiment of the present invention;

Fig. 6 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 5 after the membrane bag is wound;

Fig. 7 is a schematic diagram of the development of the reverse osmosis membrane module of the third embodiment of the present invention;

Fig. 8 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 7 after the membrane bag is wound;

Fig. 9 is a schematic diagram of the development of the reverse osmosis membrane module of the fourth embodiment of the present invention;

Fig. 10 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 9 after the membrane bag is wound;

Fig. 11 is a schematic diagram of the development of the reverse osmosis membrane module of the fifth embodiment of the present invention;

Fig. 12 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 11 after the membrane bag is wound;

Fig. 13 is a schematic diagram of the unfolded reverse osmosis membrane module of the sixth embodiment of the present invention;

Fig. 14 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 13 after the membrane bag is wound;

Fig. 15 is a schematic diagram of the unfolded reverse osmosis membrane module of the seventh embodiment of the present invention;

Fig. 16 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 15 after the membrane bag is wound;

Fig. 17 is a schematic diagram of the unfolded reverse osmosis membrane module of the eighth embodiment of the present invention;

Fig. 18 is a schematic view of the reverse osmosis membrane module shown in Fig. 17 after the membrane bag is wound.

Detailed ways

The following describes the reverse osmosis membrane module and the corresponding water purification device of the embodiment of the present utility model with reference to FIGS. 1 to 18 . Wherein, the orientations or positional relationships indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "transverse" etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

The terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "comprises or comprises" one or some of the features it encompasses, unless specifically stated otherwise, this indicates that other features are not excluded and that other features may be further included.

Unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixed" and "coupling" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to specific situations.

Fig. 1 is a schematic diagram of a filter bottle shell of a water purification device according to an embodiment of the present invention; Fig. 2 is a schematic cross-sectional view of an assembly of a filter bottle shell and a reverse osmosis membrane module.

The embodiment of the utility model provides a reverse osmosis membrane assembly 20, which is used to be installed in the filter bottle shell 10 of the water purification device. As shown in FIG. 1 and FIG. 2 , the filter bottle housing 10 includes a water inlet hole 11 and a concentrated water outlet hole 12 . Raw water (unpurified water, such as tap water) enters the filter bottle housing 10 through the water inlet 11, flows downward from the annular space between the filter bottle housing 10 and the reverse osmosis membrane module 20, and enters the inside of the reverse osmosis membrane module 20 after reaching the bottom of the reverse osmosis membrane module 20. According to the principle of reverse osmosis, the water in the raw water permeates the membrane and finally enters the central pipe 21, and is discharged from the purified water outlet 211 for drinking by users. The water containing more impurities that has not passed through the membrane is concentrated water, and the concentrated water is discharged through the concentrated water outlet hole 12.

FIG. 3 is a schematic diagram of the unfolded reverse osmosis membrane module of the first embodiment of the present invention; FIG. 4 is a schematic diagram of the reverse osmosis membrane module 20 shown in FIG. 3 after the membrane bag 22 is wound. Figures 3 and 4 illustrate the flow of water with arrows.

As shown in FIG. 3 and FIG. 4 , the reverse osmosis membrane module of the embodiment of the present invention may generally include a central pipe 21 and a membrane bag 22 . In the figure, x represents the winding direction of the film bag 22, and y represents the longitudinal direction of the central tube 21.

The central pipe 21 is hollow tubular, and has a clean water outlet 211 at one end (an axial end) for discharging clean water. The membrane bag 22 has an opposing first end 221 , a second end 222 and opposing first and second sides 223 and 224 . The lengths of the first side 223 and the second side 224 are a and b, respectively. The membrane bag 22 is square as a whole. The membrane bag 22 is composed of two reverse osmosis membranes, the backs of which are attached to each other, and the three sides are sealed. The first end 221 is opened to form a hollow bag-like space. The first end 221 of the film bag 22 is connected to the outer periphery of the central tube 21 , and the first end 221 has an opening to communicate with the inner cavity of the central tube 21 . The peripheral wall of the central tube 21 is provided with openings, holes or slits to communicate with the inside of the membrane bag 22 . The film bag 22 is wound around the central tube 21 from the first end 221 . After the film bag 22 is unfolded, the first end 221 and the second end 222 are parallel or approximately parallel to the central tube 21 , and the first side 223 and the second side 224 are perpendicular or approximately perpendicular to the central tube 21 , as shown in FIG. 3 . The number of film bags 22 can be one or more.

The second side 224 is closer to the clean water outlet 211 than the first side 223. One of the first side 223 and the second side 224 constitutes a raw water inlet, and the other constitutes a concentrated water outlet. As shown in Figures 3 and 4, the first side 223 is used as a raw water inlet. The raw water inlet is the BD section, and the concentrated water outlet is the AC section. As shown in Figure 5, the raw water inlet is the ED section.

When the water purification device is working, under the pressure of the water pump, the raw water enters the gap between the two adjacent rolls of the film bag 22 through the raw water inlet, and infiltrates the clean water into the film bag 22, so that the clean water enters the central pipe 21 and is discharged through the clean water outlet 211. The water that has not penetrated into the membrane bag 22 forms concentrated water, which is discharged through the concentrated water outlet.

A water sealing strip 40 may be provided at the second end 222 to prevent water from leaking there. A plurality of water retaining strips 31 and 32 are attached to the outer surface of the membrane bag 22 to define a bending channel between the raw water inlet and the concentrated water outlet.

In the reverse osmosis membrane module of the embodiment of the utility model, a plurality of water-retaining strips are attached to the outer surface of the membrane bag 22, and a bending channel is defined between the raw water inlet and the concentrated water outlet. In the process of water flowing from the raw water inlet to the concentrated water outlet, the water goes through a tortuous channel, the flow is longer and the turbulence effect is stronger, which can effectively alleviate the phenomenon of concentration polarization, thereby increasing the output of purified water and reducing the energy consumption of water pumps.

3 to 18 illustrate several embodiments of the present invention.

As shown in Figures 5 to 18, in some embodiments of the present invention, a water retaining strip can be extended along the edge forming the raw water inlet between the first side 223 and the second side 224, so as to shorten the raw water inlet, thereby increasing the initial velocity of the raw water inlet, thereby increasing the water flow rate, and increasing the purified water output.

For example in FIG. 5 and FIG. 6 , the first side 223 constitutes the raw water inlet ED, so that the water retaining strip 32 extends along the first side 223 . For example, the length of the water retaining strip 32 can be 1/2 of the length a of the first side 223, then the raw water inlet is shortened by 1/2, and the initial velocity of the raw water inlet is increased to about twice the original.

In some embodiments, as shown in FIGS. 5 to 18 , a plurality of water retaining strips can be arranged at intervals along the length direction of the central tube 21 . Moreover, among every two adjacent water retaining strips, one of them extends from the central pipe 21 , and the other extends from the second end 222 toward the central pipe 21 . In this way, in the process of flowing from the raw water inlet to the concentrated water outlet, the water experiences a roughly "S"-shaped curved channel, making the path more rugged, longer and more turbulent.

The arrangement of some water retaining strips of the present utility model is introduced below.

Fig. 5 is a schematic diagram of the unfolded reverse osmosis membrane module of the second embodiment of the present invention; Fig. 6 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 5 after the membrane bag is wound.

In some embodiments, as shown in FIG. 5 and FIG. 6 , the first side 223 can be configured as a raw water inlet. There are two water retaining strips, one water retaining strip 32 extends from the central tube 21 along the first side 223 , and the other water retaining strip 31 extends from the middle of the second end 222 toward the central pipe 21 .

Fig. 7 is a schematic diagram of the unfolded reverse osmosis membrane module of the third embodiment of the present invention; Fig. 8 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 7 after the membrane bag is wound.

In some embodiments, as shown in FIG. 7 and FIG. 8 , the first side 223 can constitute the raw water inlet, and the number of water retaining bars is two, wherein one water retaining bar 31 extends from the middle of the central tube 21 toward the second end 222 , and the other water retaining bar 32 starts from the second end 222 and extends along the first side 223 .

Fig. 9 is a schematic diagram of unfolding the reverse osmosis membrane module of the fourth embodiment of the present invention; Fig. 10 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 9 after the membrane bag is wound.

In some embodiments, as shown in FIG. 9 and FIG. 10 , the number of water retaining strips can be three, wherein one water retaining strip 31 starts from the middle of the second end 222 and extends toward the central pipe 21 , and the other two water retaining strips 32 and 33 respectively start from the central pipe 21 and extend along the first side 223 and the second side 224 respectively. Furthermore, the first side 223 constitutes the raw water inlet, and the second side 224 constitutes the concentrated water outlet.

Fig. 11 is a schematic diagram of the unfolded reverse osmosis membrane module of the fifth embodiment of the present invention; Fig. 12 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 11 after the membrane bag is wound.

In some embodiments, as shown in FIG. 11 and FIG. 12 , the number of water retaining strips can be three, wherein one water retaining strip 31 starts from the middle of the second end 222 and extends toward the central pipe 21 , and the other two water retaining strips 32 and 33 respectively start from the central pipe 21 and extend along the first side 223 and the second side 224 respectively. Furthermore, the second side 224 constitutes the raw water inlet, and the first side 223 constitutes the concentrated water outlet.

Fig. 13 is a schematic diagram of the unfolded reverse osmosis membrane module of the sixth embodiment of the present invention; Fig. 14 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 13 after the membrane bag is wound.

In some embodiments, as shown in FIG. 13 and FIG. 14 , the number of water retaining strips is three, wherein one water retaining strip 31 extends from the middle of the central tube 21 toward the second end 222 , and the other two water retaining strips 32 and 33 respectively start from the second end 222 and extend along the first side 223 and the second side 224 respectively. Furthermore, the first side 223 constitutes the raw water inlet, and the second side 224 constitutes the concentrated water outlet.

Fig. 15 is a schematic diagram of unfolding the reverse osmosis membrane module of the seventh embodiment of the present invention; Fig. 16 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 15 after the membrane bag is wound.

In some embodiments, as shown in FIG. 15 and FIG. 16 , there are three water retaining strips, wherein one water retaining strip 31 extends from the middle of the central tube 21 toward the second end 222 , and the other two water retaining strips 32 and 33 respectively start from the second end 222 and extend along the first side 223 and the second side 224 respectively. Furthermore, the second side 224 constitutes the raw water inlet, and the first side 223 constitutes the concentrated water outlet.

Fig. 17 is a schematic diagram of the unfolded reverse osmosis membrane module of the eighth embodiment of the present invention; Fig. 18 is a schematic diagram of the reverse osmosis membrane module shown in Fig. 17 after the membrane bag is wound.

In some embodiments, as shown in FIGS. 17 and 18 , the number of water retaining strips is five, wherein two water retaining strips 32 , 33 start from the second end 222 and extend along the first side 223 and the second side 224 respectively; The central origin of 2 extends towards the central tube 21.

In some embodiments, as shown in FIG. 17 and FIG. 18 , each water retaining strip can have an overlapping section in the length direction, that is, the length of each water retaining strip is greater than 1/2 of the length a of the first side 223 and the length b of the second side 224, so as to make the path of the bending channel more rugged, the flow process is longer and the turbulence effect is stronger.

In some embodiments, the water-retaining strip can be a waterproof tape, which is pasted on the outer surface of the membrane bag 22 .

Another aspect of the utility model also provides a water purification device, which includes the reverse osmosis membrane module as described in any one of the above embodiments. The installation and coordination of the reverse osmosis membrane module in the water purification device and other structures of the water purification device are all prior art, and will not be repeated here.

So far, those skilled in the art should recognize that although a number of exemplary embodiments of the present utility model have been illustrated and described in detail herein, many other variations or modifications that conform to the principles of the present utility model can still be directly determined or derived from the disclosed content of the utility model without departing from the spirit and scope of the utility model. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A reverse osmosis membrane module, comprising:

a central tube, one end of which is provided with a purified water outlet; and

a membrane bag having opposite first and second ends and opposite first and second sides, the first end being connected to the outer periphery of the central tube and having an opening to communicate with the central tube lumen, the membrane bag being wound around the central tube from the first end, the second side being closer to the purified water outlet than the first side, one of the first and second sides constituting a raw water inlet and the other constituting a concentrate outlet so that raw water enters a gap between adjacent two windings of the membrane bag through the raw water inlet, and purified water is permeated into the membrane bag so that purified water enters the central tube and is discharged through the purified water outlet, and non-permeated water constitutes concentrate and is discharged through the concentrate outlet;

the outer surface of the membrane bag is attached with a plurality of water retaining strips so as to define a bending channel between the raw water inlet and the concentrated water outlet.

2. The reverse osmosis membrane module according to claim 1,

one of the water blocking strips extends along the edges of the first and second sides constituting the raw water inlet to shorten the raw water inlet.

3. The reverse osmosis membrane module according to claim 2,

the water blocking strips are arranged at intervals along the length direction of the central tube; and is also provided with

One of each two adjacent water bars extends from the central tube, and the other extends from the second end towards the central tube.

4. The reverse osmosis membrane module according to claim 3,

the first side forms the raw water inlet;

the number of the water blocking strips is two, one of the water blocking strips extends from the central tube along the first edge, and the other water blocking strip extends from the middle part of the second end towards the central tube; or (b)

The number of the water blocking strips is two, one of the water blocking strips extends from the middle part of the central tube towards the second end, and the other water blocking strip extends from the second end and along the first edge.

5. The reverse osmosis membrane module according to claim 3,

the number of the water blocking strips is three, one water blocking strip extends from the middle part of the second end towards the central tube, and the other two water blocking strips respectively extend from the central tube and respectively along the first edge and the second edge.

6. The reverse osmosis membrane module according to claim 3,

the number of the water blocking strips is three, one water blocking strip extends from the middle part of the central tube towards the second end, and the other two water blocking strips respectively extend from the second end and respectively along the first edge and the second edge.

7. The reverse osmosis membrane module according to claim 3,

the number of the water bars is five, two of which respectively start from the second end and respectively extend along the first edge and the second edge; the two middle water retaining bars extend from the central tube towards the second end and are located between the first edge and the second edge, and the one middle water retaining bar is located between the two middle water retaining bars and extends from the center of the second end towards the central tube.

8. The reverse osmosis membrane module according to claim 1,

each of the water bars has an overlapping section in the length direction.

9. The reverse osmosis membrane module according to claim 1,

the water retaining strip is a waterproof adhesive tape which is adhered to the outer surface of the membrane bag.

10. A water purification apparatus comprising a reverse osmosis membrane module according to any one of claims 1 to 9.