A reverse osmosis water purification apparatus

Abstract

The present application relates to water purification equipment technical field, specifically to a kind of reverse osmosis water purification equipment, including multiple parallelly arranged reverse osmosis components, the inside of each reverse osmosis component is connected in series with multiple reverse osmosis units, the reverse osmosis unit includes water collecting pipe, and the outside of water collecting pipe is wound with composite membrane, the composite membrane includes reverse osmosis membrane, reverse osmosis membrane has inner end and outer end, and the inner end of reverse osmosis membrane is located on the outer surface of water collecting pipe, and the outer end of reverse osmosis membrane is located at its outermost side in radial direction;The outer end of reverse osmosis membrane is reversely bent to form water passage, and the water passage is parallel with the axis of water collecting pipe, and water passage can reduce the resistance of raw water into reverse osmosis membrane, thereby reducing the power consumption of reverse osmosis water purification equipment.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and in particular to a reverse osmosis water purification device. Background Technology

[0002] Reverse osmosis water purification equipment is a device that removes dissolved salts, organic matter, bacteria and other impurities from water using semi-permeable membrane technology.

[0003] Existing reverse osmosis water purification equipment includes a central tube with a reverse osmosis membrane spirally wound around it. Raw water first enters the outermost layer of the reverse osmosis membrane, then disperses to the inner layers, and finally, the purified water enters the central tube. Wastewater flows directly out through the outer side of the reverse osmosis membrane. Because each layer of the reverse osmosis membrane is tightly fitted, the raw water flows from one end of the outermost membrane to the other, requiring sufficient inlet pressure for water molecules to overcome osmotic pressure and pass through the membrane pores. Since the pressure required to enter the reverse osmosis membrane is high, a high-pressure pump is usually installed. The higher the inlet pressure, the greater the power consumption of the high-pressure pump, thus affecting the power consumption of the water purification equipment. Summary of the Invention

[0004] Therefore, it is necessary to provide a reverse osmosis water purification device to address the technical problem that the high inlet water pressure required for the reverse osmosis membrane in current water purification equipment leads to high power consumption of the high-pressure pump.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A reverse osmosis water purification device includes multiple reverse osmosis components arranged in parallel. Each reverse osmosis component contains multiple reverse osmosis units connected in series. Each reverse osmosis unit includes a water collection pipe, and a composite membrane, including a reverse osmosis membrane, is wound around the outside of the water collection pipe. The reverse osmosis membrane has an inner end and an outer end. The inner end of the reverse osmosis membrane is located on the outer surface of the water collection pipe, and the outer end of the reverse osmosis membrane is located on its outermost radial side. The outer end of the reverse osmosis membrane is bent in the opposite direction to form a water passage. The water passage is parallel to the axis of the water collection pipe, and the water passage can reduce the resistance of raw water entering the reverse osmosis membrane.

[0007] Furthermore, a first mounting ring and a second mounting ring are respectively fitted at both ends of the water collection pipe along its axial direction. The first and second mounting rings are respectively fastened to both ends of the composite membrane along its axial direction, thereby pressing the composite membrane onto the water collection pipe. A first steel wire rope and a second steel wire rope are threaded through the water passage. Both the first and second steel wire ropes extend along the axial direction of the water collection pipe. A third mounting ring is coaxially rotatably mounted inside the second mounting ring. The two ends of the first steel wire rope are respectively connected to the first and second mounting rings, and the two ends of the second steel wire rope are respectively connected to the first and third mounting rings. When the third mounting ring rotates relative to the second mounting ring, the third mounting ring drives one end of the second steel wire rope to move relative to the first steel wire rope, thereby changing the distance between the first and second steel wire ropes in the circumferential direction of the water collection pipe. This causes the water passage to be opened by the first and second steel wire ropes, thus changing its volume and adjusting the resistance of the raw water entering the reverse osmosis membrane.

[0008] Furthermore, the outer circumferential surface of the third mounting ring is provided with an arc-shaped groove, and the second mounting ring is provided with a through hole extending radially thereon. The pin passes through the through hole and enters the arc-shaped groove and slides along the arc-shaped groove.

[0009] Furthermore, the first mounting ring has multiple snap-fit ​​blocks on its end face away from the composite membrane; the third mounting ring has multiple snap-fit ​​grooves on its end face away from the composite membrane, and the water collection pipes of two adjacent reverse osmosis units are connected end to end, with the snap-fit ​​block of the first mounting ring on any water collection pipe engaging with the snap-fit ​​groove of the third mounting ring on the adjacent water collection pipe to prevent rotation.

[0010] Furthermore, the second mounting ring is provided with a first fixing hole for installing a first steel wire rope; the third mounting ring is provided with a second fixing hole for installing a second steel wire rope; in the initial state, the first fixing hole and the second fixing hole are distributed radially along the water collection pipe.

[0011] Furthermore, the composite membrane also includes an inner guide net and an outer guide net. Along the radial direction of the water collection pipe, the inner guide net is located on the inner and outer sides of the reverse osmosis membrane; the outer guide net is located on the inner and outer sides of the inner guide net.

[0012] Furthermore, the water collection pipe has multiple permeable holes evenly distributed on it, and the raw water enters the interior of the water collection pipe through the permeable holes after being filtered by the composite membrane.

[0013] Furthermore, the reverse osmosis assembly includes a reverse osmosis cylinder, with an inlet and an outlet at its two axial ends, respectively. The inlet end is provided with a first positioning component, which includes a first permeable cage and a sealing head. The sealing head is used to seal the water collection pipe, and the first permeable cage cooperates with a first mounting ring. The outlet end is provided with a second positioning component, which includes a second permeable cage and a purified water outlet pipe. The second permeable cage cooperates with a second mounting ring, and the purified water outlet pipe is connected to the water collection pipe.

[0014] Furthermore, the first mounting ring is provided with a first through hole, and the third mounting ring is provided with a second through hole. The first through hole and the second through hole are provided in a corresponding manner along the axial direction of the water collection pipe. The third mounting ring is also provided with a first notch, and the second mounting ring is provided with a second notch. The first notch and the second notch are corresponding and both extend radially along the water collection pipe. The first notch and the second notch are used to guide the raw water to the outer end of the composite membrane.

[0015] Furthermore, the inlet end of the reverse osmosis cylinder is connected to a raw water inlet pipe, which is connected to the interior of the first permeable cage; the outlet end of the reverse osmosis cylinder is connected to a purified water collection pipe and a wastewater collection pipe, which are connected to a purified water outlet pipe and to the interior of the second permeable cage.

[0016] The beneficial effects of this invention are:

[0017] The reverse osmosis water purification equipment provided by this invention, firstly, forms a water passage by bending the reverse osmosis membrane in the opposite direction at the outer end of the composite membrane, thereby allowing a portion of the raw water to diffuse along the water passage to various areas of the reverse osmosis membrane. This reduces the resistance of the raw water entering the reverse osmosis membrane, lowers the overall required inlet water pressure, and thus reduces the power consumption of the reverse osmosis water purification equipment. At the same time, when backwashing the reverse osmosis membrane, impurities and dirt are more easily discharged from the water passage, improving the backwashing effect.

[0018] Secondly, when a lower inlet water pressure is required, the third mounting ring can be rotated to increase the distance between the first and second steel wire ropes, thereby increasing the volume of the water passage and further reducing the inlet water pressure of the raw water entering the reverse osmosis membrane.

[0019] Third, by rotating the first third mounting ring, all the third mounting rings of the reverse osmosis units can be rotated, thus adjusting the volume of multiple water channels, making operation convenient. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a reverse osmosis water purification device provided in an embodiment of the present invention;

[0021] Figure 2An exploded view of the reverse osmosis component in a reverse osmosis water purification device according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the two end structures of the reverse osmosis component in a reverse osmosis water purification device according to an embodiment of the present invention;

[0023] Figure 4 An exploded view of a reverse osmosis unit in a reverse osmosis water purification device according to an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0025] Figure 6 This is a cross-sectional view of a reverse osmosis component in a reverse osmosis water purification device according to an embodiment of the present invention;

[0026] Figure 7 for Figure 6 Enlarged view of the structure at point B in the middle;

[0027] Figure 8 This is a schematic diagram of the composite membrane and water collection pipe in a reverse osmosis water purification device according to an embodiment of the present invention;

[0028] Figure 9 for Figure 8 Enlarged view of the structure at point C;

[0029] Figure 10 This is a schematic diagram of the structure of the water collection pipe, the first mounting ring, the second mounting ring, and the third mounting ring in a reverse osmosis water purification device provided in an embodiment of the present invention (wherein the first steel wire rope and the second steel wire rope are in the first state).

[0030] Figure 11 for Figure 10 A schematic diagram of the structure in which the first and second wire ropes are in the second state;

[0031] Figure 12 This is a schematic diagram of the composite membrane structure in a reverse osmosis water purification device provided in another embodiment of the present invention.

[0032] in:

[0033] 101. Raw water inlet pipe; 102. Wastewater collection pipe; 103. Clean water collection pipe; 200. Reverse osmosis assembly; 201. Reverse osmosis cylinder; 2011. Wastewater storage chamber; 2012. Second permeable cage; 2013. Raw water storage chamber; 2014. Sealing head; 2015. Clean water outlet pipe; 2016. First permeable cage; 300. Reverse osmosis unit; 301. Third mounting ring; 3011. Snap-fit ​​groove; 3012. Second fixing hole; 3013. First notch; 3014. Arc-shaped groove; 3015. 3016. Pin; 302. Second through hole; 302. Second mounting ring; 3021. Through hole; 3022. Second notch; 3023. Relief groove; 3024. First fixing hole; 303. First mounting ring; 3031. Snap-fit ​​block; 3032. First through hole; 304. Composite membrane; 3041. Outer guide net; 3042. Reverse osmosis membrane; 3043. Inner guide net; 3044. Second steel wire rope; 3045. First steel wire rope; 305. Waterproof shell; 306. Water collection pipe; 3061. Water permeable hole. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0035] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] like Figures 1 to 11 As shown, an embodiment of the present invention provides a reverse osmosis water purification device, including multiple reverse osmosis components 200 arranged in parallel. Each reverse osmosis component 200 has multiple reverse osmosis units 300 arranged in series inside. Each reverse osmosis unit 300 includes a water collection pipe 306, and a composite membrane 304 is wound around the outside of the water collection pipe 306. The composite membrane 304 includes a reverse osmosis membrane 3042, which has an inner end and an outer end. The inner end of the reverse osmosis membrane 3042 is located on the outer surface of the water collection pipe 306, and the outer end of the reverse osmosis membrane 3042 is located on its outermost radial side. The outer end of the reverse osmosis membrane 3042 is bent in the opposite direction to form a water passage. The water passage is parallel to the axis of the water collection pipe 306, and the water passage can reduce the resistance of raw water entering the reverse osmosis membrane 3042.

[0038] The width of the reverse osmosis membrane 3042 is defined to extend axially along the water collection pipe 306. Raw water enters the outer end of the composite membrane 304 and flows along the width direction of the reverse osmosis membrane 3042 until it permeates all areas of the reverse osmosis membrane 3042. Then it flows along the winding direction of the reverse osmosis membrane 3042 until it enters the water collection pipe 306. Due to the high resistance of the reverse osmosis membrane 3042, a large inlet water pressure is required for the raw water to completely permeate the width of the reverse osmosis membrane 3042.

[0039] This invention forms a water passage by bending the reverse osmosis membrane 3042 in the opposite direction at the outer end of the composite membrane 304. This allows a portion of the raw water to diffuse along the water passage to various areas in the width direction of the reverse osmosis membrane 3042, thereby reducing the resistance of the raw water entering the reverse osmosis membrane 3042 and lowering the overall required inlet water pressure, which in turn reduces the power consumption of the reverse osmosis water purification equipment. At the same time, when backwashing the reverse osmosis membrane 3042, impurities and dirt are more easily discharged from the water passage, improving the backwashing effect.

[0040] Furthermore, a first mounting ring 303 and a second mounting ring 302 are respectively fitted onto both axial ends of the water collection pipe 306. The first mounting ring 303 and the second mounting ring 302 are respectively fastened to both axial ends of the composite membrane 304, thereby pressing the composite membrane 304 onto the water collection pipe 306. A waterproof shell 305 is fitted over the composite membrane 304, covering and connecting the first mounting ring 303 and the second mounting ring 302. The waterproof shell 305 is made of fiberglass material. A first steel wire rope 3045 and a second steel wire rope 3044 are threaded through the water passage. Both the first steel wire rope 3045 and the second steel wire rope 3044 extend along the axial direction of the water collection pipe 306. The inner surface of the second mounting ring 302... The device is equipped with a third mounting ring 301 that rotates coaxially. The two ends of the first steel wire rope 3045 are connected to the first mounting ring 303 and the second mounting ring 302, respectively. The two ends of the second steel wire rope 3044 are connected to the first mounting ring 303 and the third mounting ring 301, respectively. When the third mounting ring 301 rotates relative to the second mounting ring 302, the third mounting ring 301 drives one end of the second steel wire rope 3044 to move relative to the first steel wire rope 3045. This changes the distance between the first steel wire rope 3045 and the second steel wire rope 3044 in the circumferential direction of the water collection pipe 306, causing the water passage to be opened by the first steel wire rope 3045 and the second steel wire rope 3044, thus changing the volume and adjusting the resistance of the raw water entering the reverse osmosis membrane 3042.

[0041] Because the osmotic pressure of water varies in different regions, the required inlet water pressure also varies. The inlet water pressure can be fine-tuned according to the water quality. For example, water with low osmotic pressure requires a lower inlet water pressure, which can be further reduced. When an even lower inlet water pressure is needed, rotating the third mounting ring 301 increases the distance between the first wire rope 3045 and the second wire rope 3044, thereby increasing the volume of the water passage and further reducing the inlet water pressure for the raw water entering the reverse osmosis membrane 3042. Conversely, if the inlet water pressure is too low, it may affect the filtration efficiency. Therefore, rotating the third mounting ring 301 in the reverse direction reduces the distance between the first wire rope 3045 and the second wire rope 3044, thereby increasing the inlet water pressure for the raw water entering the reverse osmosis membrane.

[0042] Furthermore, the outer circumferential surface of the third mounting ring 301 is provided with an arc-shaped groove 3014, and the second mounting ring 302 is provided with a through hole 3021 extending radially therefrom. The pin 3015 passes through the through hole 3021 and enters the arc-shaped groove 3014 and slides along the arc-shaped groove 3014. In the initial state, the pin 3015 is located in the middle position of the arc-shaped groove 3014. When the pin 3015 moves to the end of the arc-shaped groove 3014, the third mounting ring 301 can no longer rotate relative to the second mounting ring 302.

[0043] Furthermore, the first mounting ring 303 has multiple locking blocks 3031 on its end face away from the composite membrane 304; the third mounting ring 301 has multiple locking grooves 3011 on its end face away from the composite membrane 304. The locking blocks 3031 and the locking grooves 3011 engage with each other to prevent rotation, thereby enabling the multiple reverse osmosis units 300 to be connected end to end. This facilitates the positioning and installation of the multiple reverse osmosis units 300, and also facilitates the synchronous adjustment of the multiple reverse osmosis units 300.

[0044] Furthermore, the second mounting ring 302 is provided with a first fixing hole 3024 for installing the first steel wire rope 3045; the third mounting ring 301 is provided with a second fixing hole 3012 for installing the second steel wire rope 3044; in the initial state, the first fixing hole 3024 and the second fixing hole 3012 are radially distributed along the water collection pipe 306. Thus, in the initial state, the first steel wire rope 3045 and the second steel wire rope 3044 are parallel and the distance between them is minimized (corresponding to...). Figure 10 (The first state), to avoid the first wire rope 3045 or the second wire rope 3044 being deformed by stress.

[0045] The first mounting ring 303 has a first hole (not shown in the figure) corresponding to the first wire rope 3045 and a second hole (not shown in the figure) corresponding to the second wire rope 3044, respectively, with the first hole and the second hole positioned close together. Thus, as the distance between the first wire rope 3045 and the second wire rope 3044 increases, the closer to the second mounting ring 302, the greater the distance between them. Figure 11 (Second state), the larger the volume of the water passage. Since the raw water flows from the first mounting ring 303 to the second mounting ring 302, the time required for the raw water to flow to the second mounting ring 302 is longer, thus ensuring that the diffusion rate of the raw water in each region along the width of the reverse osmosis membrane 3042 is similar. The second mounting ring 302 is also provided with a clearance groove 3023 for the second steel wire rope 3044 to pass through. The second steel wire rope 3044 can slide relative to the clearance groove 3023, avoiding interference between the second steel wire rope 3044 and the second mounting ring 302.

[0046] Furthermore, the composite membrane 304 also includes an inner guide net 3043 and an outer guide net 3041. Along the radial direction of the water collection pipe 306, the inner guide net 3043 is located on the inner and outer sides of the reverse osmosis membrane 3042; the outer guide net 3041 is located on the inner and outer sides of the inner guide net 3043. This composite membrane 304 is rectangular when unfolded. During manufacturing, the lengths of both the inner guide net 3043 and the outer guide net 3041 are twice the length of the reverse osmosis membrane 3042. The middle portion of the inner guide net 3043 is bent and then placed over both sides of the reverse osmosis membrane 3042. Then, the middle portion of the outer guide net 3041 is bent and then placed over both sides of the inner guide net 3043. After applying adhesive to the edges, the manufactured composite membrane 304 is wound onto the water collection pipe 306. The inner guide net 3043 is used to evenly distribute the inlet water pressure, improving the area utilization rate of the reverse osmosis membrane 3042; it also supports the reverse osmosis membrane 3042 to prevent water flow blockage. The outer guide net 3041 is used to guide wastewater out, preventing stagnation that could lead to scaling or contamination. Both the inner guide net 3043 and the outer guide net 3041 are woven mesh structures made of polyethylene or polypropylene.

[0047] Furthermore, the water collection pipe 306 has a plurality of permeable holes 3061 evenly distributed on it. After being filtered by the composite membrane 304, the raw water enters the interior of the water collection pipe 306 through the permeable holes 3061. The permeable holes 3061 are evenly distributed along the circumference and axial direction of the water collection pipe 306, which facilitates the entry of filtered water into the interior of the water collection pipe 306.

[0048] Furthermore, the reverse osmosis assembly 200 includes a reverse osmosis cylinder 201, with an inlet and an outlet at its axial ends, respectively. The inlet end is equipped with a first positioning assembly, which includes a first permeable cage 2016 and a sealing head 2014. The inside of the first permeable cage 2016 forms a raw water storage chamber 2013, and the sealing head 2014 is used to seal the water collection pipe 306. The first permeable cage 2016 engages with a first mounting ring 303 for a stop-fitting action. The outlet end is equipped with a second positioning assembly, which includes a second permeable cage 2012 and a purified water outlet pipe 2015. The second permeable cage 2012 engages with a second mounting ring 302 for a stop-fitting action, and the inside of the second permeable cage 2012 forms a wastewater storage chamber 2011. The purified water outlet pipe 2015 is connected to the water collection pipe 306. Both the first and second positioning assemblies are threaded onto both ends of the reverse osmosis cylinder 201.

[0049] Furthermore, the first mounting ring 303 is provided with a first through hole 3032, and the third mounting ring 301 is provided with a second through hole 3016. The first through hole 3032 and the second through hole 3016 are correspondingly arranged along the axial direction of the water collection pipe 306. The third mounting ring 301 is also provided with a first notch 3013, and the second mounting ring 302 is provided with a second notch 3022. The first notch 3013 and the second notch 3022 correspond to each other and both extend radially along the water collection pipe 306. The first notch 3013 and the second notch 3022 are used to guide raw water to the outer end of the composite membrane 304. The arrangement of the first notch 3013 and the second notch 3022 can guide part of the raw water into the water passage, and then into the reverse osmosis membrane 3042.

[0050] Furthermore, the inlet end of the reverse osmosis cylinder 201 is connected to a raw water inlet pipe 101, which is connected to the interior of the first permeable cage 2016; the outlet end of the reverse osmosis cylinder 201 is connected to a purified water collection pipe 103 and a wastewater collection pipe 102, the purified water collection pipe 103 is connected to a purified water outlet pipe 2015, and the wastewater collection pipe 102 is connected to the interior of the second permeable cage 2012. The reverse osmosis water purification equipment of the present invention also includes a high-pressure pump, the outlet end of which is connected to the raw water inlet pipe 101, thereby pressurizing the raw water.

[0051] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows:

[0052] Raw water enters the inlet end of each reverse osmosis cylinder 201 through the raw water inlet pipe 101. The raw water accumulates in the raw water storage chamber 2013 formed by the first permeable cage 2016. Part of the raw water in the storage chamber 2013 directly enters the middle layer of the composite membrane 304 and diffuses along the width direction of the reverse osmosis membrane 3042. Another part of the raw water enters the outer end of the composite membrane 304 through the second notch 3022 of the second mounting ring 302 and the first notch 3013 of the third mounting ring 301, and then enters the water passage of the reverse osmosis membrane 3042 until it permeates all areas along the width direction of the reverse osmosis membrane 3042. Then, all the raw water flows along the winding direction of the reverse osmosis membrane 3042 until it enters the water collection pipe 306. Because the resistance to the water passage is low for a portion of the raw water, the overall inlet pressure of the raw water entering the reverse osmosis membrane 3042 is reduced, thereby reducing the power consumption of the reverse osmosis water purification equipment.

[0053] The raw water, after being filtered by the reverse osmosis membrane 3042, enters the water collection pipe 306 and is collected by the water collection pipe 103 through the water outlet pipe 2015. The wastewater that cannot be filtered by the reverse osmosis membrane 3042 flows along the space between the waterproof shell 305 and the outer layer of the composite membrane 304 to the outlet end of the reverse osmosis cylinder 201 and is stored in the wastewater storage chamber 2011 of the second permeable cage 2012. The wastewater storage chamber 2011 is connected to the wastewater collection pipe 102, thereby realizing the collection and discharge of wastewater.

[0054] When adjusting different inlet water pressures, the second positioning component can be rotated out from the end of the reverse osmosis cylinder 201, and then the third mounting ring 301 can be rotated relative to the second mounting ring 302 until the pin 3015 moves to the end of the arc groove 3014. This causes the third mounting ring 301 to increase the distance between the second wire rope 3044 and the first wire rope 3045 along the circumference of the water collection pipe 306, increasing the volume of the water passage and further reducing the resistance of raw water entering the reverse osmosis membrane 3042. Then, as the third mounting ring 301 continues to rotate, the second mounting ring 302 rotates synchronously. The rotation of the second mounting ring 302 drives the first mounting ring 303 to rotate through the waterproof shell 305. The rotation of the first mounting ring 303 drives the third mounting ring 301 of the adjacent reverse osmosis unit 300 to rotate, thereby increasing the distance between the first wire rope 3045 and the second wire rope 3044 of the adjacent reverse osmosis unit 300, and increasing the volume of the water passage of the adjacent reverse osmosis unit 300. As the third mounting ring 301 continues to rotate, it synchronously drives the second mounting ring 302, the waterproof shell 305, and the first mounting ring 303 to rotate, which in turn drives the third mounting ring 301 of the next adjacent reverse osmosis unit 300 to rotate, increasing the volume of the water passage of the next adjacent reverse osmosis unit 300. Thus, with one rotation, the volume of the water passage of all reverse osmosis units 300 is increased. Finally, the second positioning assembly is reinstalled into the reverse osmosis cartridge 201, and the above filtration process is repeated.

[0055] When backwashing the reverse osmosis membrane 3042, impurities and dirt can more easily flow out from the water passages of the reverse osmosis membrane 3042, improving the backwashing effect.

[0056] Figure 12 As shown, another embodiment of the present invention provides a reverse osmosis water purification device. The difference between this device and the reverse osmosis water purification device in the above embodiment is that the composite membrane 304 is unfolded into a right trapezoid, so that the outer end of the composite membrane 304 has a certain angle with the axis of the water collection pipe 306. This can increase the contact area between the reverse osmosis membrane 3042 and the raw water, thereby improving the filtration efficiency of the raw water.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A reverse osmosis water purification device, characterized in that, The device includes multiple reverse osmosis (RO) modules arranged in parallel. Each RO module contains multiple RO units connected in series. Each RO unit includes a water collection pipe, around which a composite membrane is wound. The composite membrane includes a reverse osmosis membrane with an inner end and an outer end. The inner end of the reverse osmosis membrane is located on the outer surface of the water collection pipe, and the outer end is located on its outermost radial side. The outer end of the reverse osmosis membrane is bent in the opposite direction to form a water passage for raw water to enter, thereby reducing the resistance of the raw water entering the reverse osmosis membrane. A first mounting ring and a second mounting ring are respectively fitted at both axial ends of the water collection pipe, and the first and second mounting rings are respectively engaged. At both axial ends of the composite membrane, the composite membrane is pressed tightly onto the water collection pipe. A first steel wire rope and a second steel wire rope are threaded through the water passage, both extending axially along the water collection pipe. A third mounting ring is coaxially rotatable inside the second mounting ring. The two ends of the first steel wire rope are connected to the first and second mounting rings respectively, and the two ends of the second steel wire rope are connected to the first and third mounting rings respectively. When the third mounting ring rotates relative to the second mounting ring, it causes one end of the second steel wire rope to move relative to the first steel wire rope, thus changing the distance between the first and second steel wire ropes in the circumferential direction of the water collection pipe, allowing water to flow through. The flow path is expanded by the first and second steel wire ropes, thus changing its volume and adjusting the resistance of raw water entering the reverse osmosis membrane. The reverse osmosis assembly includes a reverse osmosis cylinder, with an inlet and an outlet at its axial ends. The inlet end is equipped with a first positioning component, which includes a first permeable cage and a sealing head. The sealing head is used to seal the water collection pipe, and the first permeable cage cooperates with a first mounting ring. The outlet end is equipped with a second positioning component, which includes a second permeable cage and a purified water outlet pipe. The second permeable cage cooperates with a second mounting ring, and the purified water outlet pipe is connected to the water collection pipe. The first mounting ring is equipped with... The device has a first through hole and a second through hole on a third mounting ring, with the first and second through holes corresponding to each other along the axial direction of the water collection pipe. The third mounting ring also has a first notch and the second mounting ring has a second notch, with the first and second notches corresponding to each other and both extending radially along the water collection pipe. The first and second notches are used to guide raw water to the outer end of the composite membrane. The inlet end of the reverse osmosis cylinder is connected to a raw water inlet pipe, which is connected to the interior of the first permeable cage. The outlet end of the reverse osmosis cylinder is connected to a purified water collection pipe and a wastewater collection pipe, with the purified water collection pipe connected to the purified water outlet pipe and the wastewater collection pipe connected to the interior of the second permeable cage.

2. The reverse osmosis water purification equipment according to claim 1, characterized in that, The outer circumferential surface of the third mounting ring is provided with an arc-shaped groove, and the second mounting ring is provided with a through hole extending radially thereon. The pin passes through the through hole and enters the arc-shaped groove and slides along the arc-shaped groove.

3. The reverse osmosis water purification equipment according to claim 1, characterized in that, The first mounting ring has multiple snap-fit ​​blocks on its end face away from the composite membrane; the third mounting ring has multiple snap-fit ​​grooves on its end face away from the composite membrane. The water collection pipes of two adjacent reverse osmosis units are connected end to end, and the snap-fit ​​block of the first mounting ring on any water collection pipe is anti-rotationally engaged with the snap-fit ​​groove of the third mounting ring on the adjacent water collection pipe.

4. The reverse osmosis water purification equipment according to claim 1, characterized in that, The second mounting ring is provided with a first fixing hole for installing a first steel wire rope; the third mounting ring is provided with a second fixing hole for installing a second steel wire rope; in the initial state, the first fixing hole and the second fixing hole are distributed radially along the water collection pipe.

5. The reverse osmosis water purification equipment according to claim 1, characterized in that, The composite membrane also includes an inner guide net and an outer guide net. Along the radial direction of the water collection pipe, the inner guide net is located on both the inner and outer sides of the reverse osmosis membrane; the outer guide net is located on both the inner and outer sides of the inner guide net.

6. The reverse osmosis water purification equipment according to claim 1, characterized in that, The water collection pipe has multiple permeable holes evenly distributed on it. After being filtered by the composite membrane, the raw water enters the interior of the water collection pipe through the permeable holes.

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