Reverse osmosis water treatment device based on reverse osmosis membrane

Abstract

The invention relates to the field of water treatment facilities, in particular to a reverse osmosis water treatment device based on a reverse osmosis membrane, which comprises a casing and a filter cartridge fixed in the casing, the top of the casing is provided with a top cover for sealing the top opening of the filter cartridge, and the outer wall of the filter cartridge is coated with a membrane layer to form a reverse osmosis membrane assembly. A cleaning cover is vertically arranged in the filter cartridge in a sliding manner, a driving disc is movably arranged in the cleaning cover, an inner cover is arranged in the filter cartridge, a water injection cavity is formed in an inner cavity of the filter cartridge between the inner cover and the cleaning cover, and the pressure in the water injection cavity is synchronously changed along with the lifting movement of the cleaning cover. The cleaning cover with the pressurization and decompression switching function is arranged to serve as a pressure adjusting component, so that the active water suction and injection function of the water injection cavity is conveniently achieved, automatic water suction and filtration are conveniently achieved when a tap water pipeline is cut off or used in the environment without tap water, more use scenes are met, and meanwhile the discharged waste water proportion can be adjusted according to needs; no extra pressurization component is needed, and the equipment integration degree is higher.

Description

Technical Field

[0001] This invention relates to the field of water treatment facilities, and more specifically to a reverse osmosis water treatment device based on a reverse osmosis membrane. Background Technology

[0002] Reverse osmosis water treatment technology is widely used in the field of water purification. Its core principle is to filter water using a reverse osmosis membrane, allowing water molecules to pass through the membrane while impurities are retained. Traditional reverse osmosis membrane-based water treatment devices mostly rely on external pressurization to propel raw water through the membrane, a method with significant drawbacks. Firstly, adding components to the outside of the filter chamber increases the overall size of the water treatment equipment, making installation and maintenance more complicated and difficult to install in residential or small commercial water areas. Secondly, existing one-way pressurization devices, during long-term use, cause impurities to accumulate on the filter surface due to continuous pressurization, forming a fouling layer that further hinders water passage and reduces filtration efficiency. Furthermore, regarding the discharge of filtered wastewater, traditional devices typically guide the wastewater through a pipe equipped with a solenoid valve after filtration, relying on the solenoid valve to control the discharge. This method is limited by the size of the solenoid valve, resulting in a narrow connection between the wastewater pipe and the filter chamber. This leads to wastewater and impurities remaining on the pipe wall, contaminating the subsequently injected raw water. Moreover, this type of structure often cannot flexibly adjust the proportion of wastewater discharged based on the actual cleanliness of the raw water. Excessive wastewater discharge wastes water resources, failing to meet energy conservation and environmental protection requirements; insufficient discharge easily leads to excessive impurities remaining on the reverse osmosis membrane, affecting subsequent filtration efficiency and potentially even causing membrane pore blockage. Meanwhile, most traditional devices require periodic shutdowns to disassemble and clean the inner wall of the filter cartridge. Manual cleaning during shutdowns can disrupt normal water treatment operations, and frequent disassembly can also damage the equipment's sealing performance. Other water purifiers equipped with backwashing functions require additional pressurization pipes to be installed on the side of the filtered pure water, increasing equipment costs and requiring pure water for backwashing, resulting in high water consumption and operating costs. Summary of the Invention

[0003] The purpose of this invention is to provide a reverse osmosis water treatment device based on a reverse osmosis membrane to solve the above-mentioned problems. By setting a cleaning hood with a pressure boosting and depressurization switching function as a pressure regulating component, the active water intake and injection function of the water injection chamber can be realized. This facilitates automatic water intake and filtration when the tap water pipeline is interrupted or there is no tap water, meeting more usage scenarios. At the same time, the proportion of wastewater discharged can be adjusted as needed without the need for additional pressure boosting components, resulting in higher equipment integration. See the following description for details.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a reverse osmosis water treatment device based on a reverse osmosis membrane, comprising a housing and a filter cartridge fixed inside the housing. A top cover is provided on the top of the housing to seal the top opening of the filter cartridge. The outer wall of the filter cartridge is covered with a membrane layer to form a reverse osmosis membrane assembly. A cleaning cover is vertically slidably disposed inside the filter cartridge, and a drive disc is movably disposed inside the cleaning cover. An inner cover is provided inside the filter cartridge, and the inner cavity of the filter cartridge between the inner cover and the cleaning cover forms a water injection chamber. The pressure in the water injection chamber changes synchronously with the lifting and lowering movement of the cleaning cover. A support ring is fixed at the bottom end of the filter cartridge, and a baffle that can open and seal the bottom opening of the filter cartridge is hinged to the bottom side of the support ring. A drive mechanism is provided between the inner cover and the top cover to pull the drive disc and drive the cleaning cover to slide up and down. A transfer pipe communicating with the water injection chamber is provided on the drive disc. The transfer pipe extends spirally between the cleaning cover and the top cover, and the top end of the transfer pipe extends out of the top cover and is connected to a raw water pipe.

[0005] In the reverse osmosis water treatment device based on the above-mentioned reverse osmosis membrane, when raw water is injected into the water injection chamber between the cleaning hood and the baffle for filtration during use, the motor drives the fixed pulley to rotate the steel wire rope. The steel wire rope pulls the hoop to move the drive disc upward. The drive disc slides upward in the valve chamber and presses against the top wall of the valve chamber. At this time, the water injection groove on the outer circumference of the drive disc overlaps and connects with the water injection hole on the outer wall of the hood. Thus, a water injection channel is formed through the water injection groove and water injection hole to connect the transfer pipe with the water injection chamber below for water supply. During the process of the cleaning hood moving upward as a whole, the volume of the water injection chamber increases to form a negative pressure, thereby forming an active water suction action and improving the water injection efficiency. When the water level in the injection chamber reaches the set height, the motor reverses to pull the drive disc downwards within the valve chamber. During this process, the cleaning hood remains stationary. When the drive disc moves down to the bottom wall of the valve chamber, the water injection groove on the outer circumference of the drive disc and the water injection hole on the outer wall of the hood are interlocked and sealed, thus automatically closing the water injection channel. At this point, the drive disc continues to move downwards, pushing against the bottom wall of the hood and causing the entire cleaning hood to move downwards. The cover of the cleaning hood forms a sliding seal with the inner wall of the filter cartridge, thus using the injection chamber as a pressurization chamber. The continuous downward movement of the cover increases the pressure inside the injection chamber, promoting the filtration of raw water through the filter cartridge and membrane layer into the pure water chamber between the housing and the membrane layer, achieving active pressurized filtration. As the cleaning hood continues to move downward until the bottom of the top rod touches the top cap of the pressure rod, the pressurization and filtration action in the pressurization chamber is completed. The residual water in the water injection chamber is the wastewater that needs to be discharged. At this time, the water injection chamber acts as a waste discharge chamber. The drive mechanism drives the drive disc to support the cleaning hood and the top rod to continue moving downward. The top rod pushes the pressure rod and the baffle downward, which in turn pushes the baffle to flip open under the support of the rotating ear. At this time, the self-sealing part rotates downward with the baffle and compresses the spring synchronously. At this time, the baffle forms an inclined structure to release the baffle from the closed state of the bottom opening of the filter cartridge. The inclined baffle in this state quickly guides the wastewater into the wastewater hopper. The amount of wastewater discharged per batch needs to be adjusted according to the actual cleanliness of the raw water. Based on the ratio of pure water to wastewater that can be filtered from the raw water, the wastewater hopper is removed from the support ring to expose the pressure rod. The pressure rod is rotated by turning the knob, and the pressure rod is supported by the screw sleeve to rotate and rise. This changes the preset height of the pressure cap at the top of the pressure rod, and then adjusts the set height of the cleaning hood when the top rod moves down and is pressed against the pressure cap. This changes the set height of the waste discharge chamber, so as to adjust the amount of wastewater discharged per batch of filtration as needed.

[0006] Preferably, the outer wall of the filter cartridge is densely covered with water passage holes, and the cleaning cover includes a cover with an outer wall flush with the inner wall of the filter cartridge. A cover cylinder is fixed on the top side of the cover, and the cover cylinder and the cover form a valve cavity for accommodating the vertical sliding of the drive disc. A sliding hole is passed through the eccentric part of the top of the cover to accommodate the bottom end of the transfer pipe, and the sliding hole is clearance-fitted with the outer wall of the transfer pipe.

[0007] Preferably, the outer wall of the cover is provided with a plurality of through-hole water injection holes, and the outer circumference of the drive disc is provided with an annular groove-shaped water injection groove. When the drive disc slides downward and abuts against the bottom surface of the valve cavity, the water injection groove and the water injection hole are misaligned and closed. When the drive disc slides upward and abuts against the top surface of the valve cavity, the water injection groove and the water injection hole overlap and open, so that the transfer pipe can be connected to the lower water injection cavity in sequence through the water injection groove and the water injection hole.

[0008] Preferably, the top surface of the drive disc is provided with a mounting hole corresponding to the sliding hole, which is connected to the water injection tank. The bottom end of the transfer pipe passes through the mounting hole and is interference-fitted with the mounting hole. The top side of the cover is provided with an upper telescopic sleeve connected to the bottom surface of the top cover, and the bottom surface of the cover cylinder is provided with a lower telescopic sleeve connected to the top surface of the inner cover.

[0009] Preferably, the driving mechanism includes two sets of fixed pulleys symmetrically fixed to opposite sides of the top cover and the inner cover. A steel wire rope is wound between the two sets of fixed pulleys to pull the driving disc and drive the cleaning cover to move up and down. The steel wire rope is looped. The driving disc is provided with a hoop and a receiving hole. The two sides of the steel wire rope pass through the hoop and the receiving hole respectively. The receiving hole is clearance-fitted with one side of the steel wire rope, and the driving disc is fixedly connected to the other side of the steel wire rope through the hoop.

[0010] Preferably, the cover is a ring-shaped structure that accommodates the wire rope passing through it, and the bottom of the cover cylinder is provided with two sets of guide holes that accommodate the wire rope passing through on both sides, and one set of the fixed pulleys is externally connected to a motor.

[0011] Preferably, a vertically extending top rod is provided at the bottom of the cleaning cover near the hinge side of the baffle and the support ring, and a clearance hole is provided through the inner cover to accommodate the downward extension of the top rod. A pressure-bearing rod is provided on the baffle below the top rod, and a self-sealing component for connecting the support ring is provided on the side of the baffle away from the pressure-bearing rod.

[0012] Preferably, a rotating shaft is provided on the outer side of the baffle, and a rotating lug is provided on the bottom surface of the support ring to support the rotation of the baffle in conjunction with the rotating shaft. Multiple nested lower sealing rings are coaxially provided on the top surface of the baffle, and a threaded sleeve is fixed on the baffle to accommodate the vertical penetration of the pressure rod. The pressure rod is threadedly engaged with the threaded sleeve, and a pressure cap is fixed at the top of the pressure rod to accommodate the bottom end of the top rod extending into it. A knob is fixed at the bottom end of the pressure rod.

[0013] Preferably, the support ring is provided with a limiting groove for accommodating a self-sealing component that extends vertically. The self-sealing component includes a screw that is vertically fixed to the top side of the baffle and extends through the limiting groove. A washer is sleeved on the outside of the screw. A spring is sleeved on the top of the screw to keep the washer pressed against the top surface of the support ring. An upper sealing ring is provided on the top surface of the support ring to alternately press against the lower sealing ring.

[0014] Preferably, a wastewater hopper is detachably provided on the outside of the support ring, and a wastewater pipe extending outward is connected to the bottom of the wastewater hopper. The housing includes a separable upper half and a lower half. A pure water pipe is connected to one side of the bottom of the lower half. A raw water pipe connected to the top opening of the transfer pipe is provided on the outside of the top cover.

[0015] The beneficial effects are as follows: 1. By integrating a filter cartridge, a movable cleaning cover, and a drive disc inside the housing, the cleaning cover is raised and lowered by the drive disc, serving as a cleaning component for the inner wall of the filter cartridge and a pressurizing component for the water injection chamber below. This eliminates the need for additional pressurizing equipment connected outside the filter chamber, thereby reducing the overall size of the device and making it more suitable for the installation space of household daily water use and small commercial water use areas. The installation and maintenance process is also simpler.

[0016] 2. The cleaning hood is raised and lowered by the drive disc, which causes the pressure in the water injection chamber to change synchronously, thus achieving dynamic adjustment of water pressure. This replaces the traditional unidirectional continuous pressurization filtration method. It avoids the drawback of excessive adhesion of impurities on the filter surface due to continuous unidirectional pressurization, which forms a dirt layer. This ensures smooth water passage, significantly improves the filtration effect, and also helps to extend the service life of the reverse osmosis membrane. 3. By setting up a cleaning cover with pressure boosting and depressurization switching function as a pressure regulating component, it is possible to realize the active water intake function of the water injection chamber, so as to realize automatic water intake and filtration when the tap water pipe is shut off or there is no tap water, and meet more usage scenarios. 4. The wastewater hopper and the rotatable inclined baffle work together to ensure smooth wastewater discharge, reducing the residue of wastewater and impurities on the filter cartridge wall and lowering the risk of pollution to the subsequent raw water. In addition, the wastewater discharge ratio can be flexibly adjusted according to the actual cleanliness of the raw water by adjusting the height of the pressure rod. This avoids water waste caused by excessive wastewater volume and prevents impurities from remaining in the reverse osmosis membrane due to insufficient wastewater volume.

[0017] 5. The cleaning mechanism, consisting of a cleaning hood and a drive mechanism, eliminates the need to stop the machine to disassemble the internal parts of the cleaning unit and to install additional pure water backwash pipes. During operation, the cleaning hood is moved up and down by the drive disc to scrape and clean the inner wall of the filter cartridge and the membrane layer. The inner wall cleaning action is completed synchronously by the movement of the pressurization component, which simplifies the equipment structure and optimizes the cleaning function. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a structural breakdown diagram of the present invention; Figure 4 This is a right-side structural diagram of the present invention; Figure 5 This is the present invention. Figure 4 Structural cross-section at point AA; Figure 6 This is a schematic diagram showing the overall structure of the present invention broken down; Figure 7 This is a structural breakdown diagram of the cleaning cover of the present invention; Figure 8 This is a three-dimensional structural diagram of the drive disk of the present invention; Figure 9 This is a three-dimensional structural schematic diagram of the baffle of the present invention; Figure 10 This is a structural breakdown diagram of another aspect of the present invention; Figure 11 This is a three-dimensional structural schematic diagram of the cover of the present invention; Figure 12 This is a three-dimensional structural diagram of the filter cartridge of the present invention.

[0020] The annotations in the attached figures are explained as follows: 1. Housing; 101. Upper half-shell; 102. Lower half-shell; 2. Top cover; 3. Filter cartridge; 301. Water passage hole; 4. Membrane layer; 5. Cleaning cover; 501. Cover; 501a. Sliding hole; 502. Cover sleeve; 503. Upper telescopic sleeve; 504. Lower telescopic sleeve; 505. Water inlet hole; 506. Guide hole; 6. Drive disc; 601. Mounting hole; 602. Water inlet groove; 603. Hoop; 604. Receiving hole; 7. Steel wire rope; 8. Fixed pulley; 9. Inner cover ; 901, clearance hole; 10, baffle; 10a, rotating shaft; 10b, lower sealing ring; 10c, threaded sleeve; 11, self-sealing component; 11a, screw; 11b, spring; 11c, gasket; 12, pressure rod; 12a, pressure cap; 12b, knob; 13, transfer pipe; 14, top rod; 15, support ring; 15a, rotating ear; 15b, limiting groove; 15c, upper sealing ring; 16, wastewater hopper; 17, wastewater pipe; 18, pure water pipe; 19, raw water pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0022] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] See Figures 1-12 As shown, this invention provides a reverse osmosis water treatment device based on a reverse osmosis membrane, including a housing 1 and a filter cartridge 3 fixed inside the housing 1. A top cover 2 is provided on the top of the housing 1 to seal the top opening of the filter cartridge 3. The outer wall of the filter cartridge 3 is covered with a membrane layer 4 to form a reverse osmosis membrane assembly for achieving reverse osmosis filtration of raw water. This allows water molecules to pass through the membrane layer 4 into the pure water chamber between the housing 1 and the membrane layer 4, while retaining impurities in the water. A cleaning cover 5 is vertically slidably installed inside the filter cartridge 3, and a drive disc 6 is movably installed inside the cleaning cover 5. An inner cover 9 is provided inside the filter cartridge 3, and the inner cavity of the filter cartridge 3 between the inner cover 9 and the cleaning cover 5 forms a water injection chamber. The pressure in this water injection chamber changes synchronously with the lifting and lowering movement of the cleaning cover 5, thereby achieving the switching between dynamic pressurization and negative pressure water absorption. The filtration pressure can be adjusted by an external pressurization device. A support ring 15 is fixed at the bottom of the filter cartridge 3. A baffle 10 that can be opened and closed at the bottom of the filter cartridge 3 is hinged to the bottom side of the support ring 15. A drive mechanism is set between the inner cover 9 and the top cover 2 to pull the drive disc 6 to drive the cleaning cover 5 to slide up and down. This mechanism provides the power for the cleaning cover 5 and the drive disc 6 to lift and lower. Precise control is achieved through mechanical transmission. A transfer pipe 13 that connects to the water injection chamber is set on the drive disc 6. The transfer pipe 13 extends spirally between the cleaning cover 5 and the top cover 2, thereby extending the water flow path and initially buffering the water pressure during water delivery. At the same time, it saves internal space. The top of the transfer pipe 13 extends out of the top cover 2 and is connected to the raw water pipe 19, which is used to introduce the raw water from the external pipeline into the transfer pipe 13 along the raw water pipe 19.

[0026] As an optional implementation, the outer wall of the filter cartridge 3 is densely covered with water passage holes 301. The cleaning cover 5 includes a cover 501 whose outer wall is flush with the inner wall of the filter cartridge 3. It is used to form a sliding seal with the inner wall of the filter cartridge 3 to ensure the sealing of the water injection chamber. At the same time, it scrapes away impurities attached to the inner wall of the filter cartridge 3 during the lifting and lowering process. A cover cylinder 502 is fixed on the top side of the cover 501. The cover cylinder 502 and the cover 501 form a valve chamber for accommodating the vertical sliding of the drive disc 6. A sliding hole 501a is passed through the eccentric part of the top of the cover 501 to accommodate the bottom end of the transfer pipe 13. The sliding hole 501a is in clearance fit with the outer wall of the transfer pipe 13 to allow the transfer pipe 13 to slide vertically relative to the cover 501, which can ensure the flexibility of the structure movement. The outer wall of the cover 502 is surrounded by multiple through-hole water injection holes 505, and the outer circumference of the drive disc 6 is provided with an annular groove water injection groove 602. When the drive disc 6 slides downward and presses against the bottom surface of the valve cavity, the water injection groove 602 and the water injection hole 505 are misaligned and closed to cut off the connection between the transfer pipe 13 and the water injection cavity, thereby closing the water injection channel and preparing for subsequent pressurized filtration. When the drive disc 6 slides upward and presses against the top surface of the valve cavity, the water injection groove 602 and the water injection hole 505 overlap and open to connect the transfer pipe 13 and the water injection cavity, forming a raw water injection channel to facilitate the entry of raw water into the water injection cavity. The transfer pipe 13 is then connected to the lower water injection cavity through the water injection groove 602 and the water injection hole 505 in sequence. With this configuration, the water injection channel can be automatically opened and closed by sliding the drive disc 6 without the need for additional valve control, which simplifies the structure and improves operating efficiency. The top surface of the drive disc 6 is provided with a mounting hole 601 corresponding to the sliding hole 501a, which connects to the water injection tank 602. The bottom end of the transfer pipe 13 is inserted into the mounting hole 601 and is press-fitted with the mounting hole 601 to ensure that the transfer pipe 13 moves synchronously with the drive disc 6, and at the same time ensures the sealing of the connection between the two to prevent water leakage. The top side of the cover 501 is provided with an upper telescopic sleeve 503 connected to the bottom surface of the top cover 2, which serves as a telescopic sealing structure between the top cover 2 and the cover 501 to prevent external impurities from entering the internal components. The bottom surface of the cover cylinder 502 is provided with a lower telescopic sleeve 504 connected to the top surface of the inner cover 9, which serves as a telescopic sealing structure between the cover cylinder 502 and the inner cover 9 to ensure the sealing of the water injection chamber. With this configuration, the internal cavity can be effectively isolated from the external environment without affecting the lifting and lowering movement of the cleaning cover 5, thereby improving the sealing reliability of the device. The drive mechanism includes two sets of fixed pulleys 8 symmetrically fixed on opposite sides of the top cover 2 and the inner cover 9. A steel wire rope 7 is wound and connected between the two sets of fixed pulleys 8 to pull the drive disc 6 and drive the cleaning cover 5 to move up and down. Specifically, the steel wire rope 7 is in the shape of a ring. The drive disc 6 is provided with a sleeve 603 and a receiving hole 604. The two sides of the steel wire rope 7 pass through the sleeve 603 and the receiving hole 604 respectively. The receiving hole 604 is clearance-fitted with one side of the steel wire rope 7, and the drive disc 6 is fixedly connected to the other side of the steel wire rope 7 through the sleeve 603. This serves as a flexible connector to realize the power transmission between the drive disc 6 and the fixed pulleys 8. This configuration makes it easy to drive the fixed pulleys 8 to rotate forward and backward by the motor, so as to drive the steel wire rope 7 to pull the drive disc 6 up and down, thereby realizing the lifting and lowering control of the cleaning cover 5. The transmission is smooth and the energy consumption is low. The cover 501 is a ring-shaped structure that accommodates the wire rope 7 passing through. The bottom of the cover cylinder 502 is provided with two sets of guide holes 506 to accommodate the wire rope 7 passing through on both sides. These holes are used to limit the movement direction of the wire rope 7 and prevent the wire rope 7 from rubbing against the inner wall of the cover cylinder 502 and causing wear. In addition, one set of fixed pulleys 8 has an external drive connection to a motor to provide rotational power to the fixed pulleys 8. The lifting and lowering adjustment of the drive disc 6 is achieved by controlling the forward and reverse rotation of the motor, which has a high degree of automation. A vertically extending push rod 14 is provided at the bottom of the cleaning cover 5 near the hinge side of the baffle 10 and the support ring 15. A clearance hole 901 is provided through the inner cover 9 to accommodate the downward extension of the push rod 14, which provides space for the vertical movement of the push rod 14 and avoids interference between the push rod 14 and the inner cover 9. A pressure rod 12 is provided on the baffle 10 below the push rod 14, and a self-sealing part 11 connecting the support ring 15 is provided on the side of the baffle 10 away from the pressure rod 12, which serves as an automatic sealing structure between the baffle 10 and the support ring 15 to ensure the sealing performance when the baffle 10 is pressed against the bottom opening of the filter cartridge 3. A rotating shaft 10a is provided on the outer side of the baffle 10. A rotating ear 15a is provided on the bottom surface of the support ring 15 to support the rotation of the baffle 10 in conjunction with the rotating shaft 10a. A multi-ring nested lower sealing ring 10b is coaxially provided on the top surface of the baffle 10. A threaded sleeve 10c is fixed on the baffle 10 to accommodate the vertically penetrating pressure rod 12. The pressure rod 12 is threadedly engaged with the threaded sleeve 10c. The height of the pressure cap 12a at the top of the pressure rod 12 is adjusted by rotating the pressure rod 12, thereby adjusting the timing of the top rod 14 triggering the opening of the baffle 10. A pressure cap 12a is fixed at the top of the pressure rod 12 to accommodate the bottom end of the top rod 14. A knob 12b is fixed at the bottom of the pressure rod 12 for easy manual rotation and adjustment of the pressure rod 12 to achieve precise control of the wastewater volume. The support ring 15 is provided with a limiting groove 15b for accommodating the self-sealing component 11 that extends vertically. The self-sealing component 11 includes a screw 11a that is vertically fixed to the top side of the baffle 10 and extends through the limiting groove 15b. A washer is sleeved on the outside of the screw 11a. A spring 11b is sleeved on the top of the screw 11a to keep the washer pressed against the top surface of the support ring 15. This provides continuous elastic force to keep the washer pressed tightly against the top surface of the support ring 15, ensuring the sealing performance of the baffle 10 in the closed state. At the same time, it can elastically reset when the baffle 10 is opened. An upper sealing ring 15c is provided on the top surface of the support ring 15 to alternately press against the lower sealing ring 10b. A wastewater hopper 16 is detachably provided on the outside of the support ring 15 via threads. The bottom of the wastewater hopper 16 is connected to an outwardly extending wastewater pipe 17. The housing 1 includes a separable upper half-shell 101 and a lower half-shell 102. A pure water pipe 18 is connected to one side of the bottom of the lower half-shell 102. A raw water pipe 19 is provided on the outside of the top cover 2, which is connected to the top opening of the transfer pipe 13.

[0027] With the above structure, during use, when raw water is injected into the water injection chamber between the cleaning cover 5 and the baffle 10 for filtration, the motor drives the fixed pulley 8 to pull the steel wire rope 7 to rotate. The steel wire rope 7 pulls the hoop 603 to drive the drive disc 6 to move upward. The drive disc 6 slides upward in the valve chamber and presses against the top wall of the valve chamber. At this time, the water injection groove 602 on the outer circumference of the drive disc 6 overlaps and connects with the water injection hole 505 on the outer wall of the cover cylinder 502. Thus, a water injection channel is formed through the water injection groove 602 and the water injection hole 505 to connect the transfer pipe 13 with the lower water injection chamber for water supply. During the process of the cleaning cover 5 moving upward as a whole, the volume of the water injection chamber increases to form a negative pressure, thereby forming an active water suction action and improving the water injection efficiency. When the water level in the injection chamber reaches the set height, the motor reverses to pull the drive disc 6 downward in the valve chamber. During this process, the cleaning cover 5 remains stationary. When the drive disc 6 moves down to the bottom wall of the valve chamber, the water injection groove 602 on the outer circumference of the drive disc 6 and the water injection hole 505 on the outer wall of the cover 502 are interlocked and sealed, thus automatically sealing the water injection channel. At this time, the drive disc 6 continues to move down, pushing the bottom wall of the cover 502 and driving the cleaning cover 5 to move down as a whole. The cover 501 of the cleaning cover 5 forms a sliding sealing structure with the inner wall of the filter cartridge 3, thus making the injection chamber a pressurization chamber. The cover 501 continues to move down to increase the pressure in the injection chamber, promoting the raw water to be filtered through the filter cartridge 3 and the membrane layer 4 into the pure water chamber between the housing 1 and the membrane layer 4, realizing active pressurization filtration. When the cleaning hood 5 continues to move down until the bottom end of the top rod 14 abuts against the top cap 12a of the pressure rod 12, the pressurization and filtration action in the pressurization chamber is completed. The residual water in the water injection chamber is the wastewater that needs to be discharged. At this time, the water injection chamber acts as a waste discharge chamber. The drive mechanism drives the drive disc 6 to support the cleaning hood 5 and the top rod 14 to continue to move down. The top rod 14 pushes the pressure rod 12 and the baffle 10 downward, thereby pushing the baffle 10 to flip open under the support of the rotating ear 15a. At this time, the self-sealing part 11 rotates downward with the baffle 10 and compresses the spring 11b synchronously. At this time, the baffle 10 forms an inclined structure to release the closed state of the baffle 10 on the bottom opening of the filter cartridge 3. The inclined baffle 10 in this state quickly guides the wastewater into the wastewater hopper 16. The amount of wastewater discharged per batch needs to be adjusted according to the actual cleanliness of the raw water. Based on the ratio of pure water to wastewater that can be filtered from the raw water, the wastewater hopper 16 is removed from the support ring 15 to expose the pressure rod 12. The pressure rod 12 is rotated by turning the knob 12b. The pressure rod 12 is supported by the screw sleeve 10c to rotate and lift, thereby changing the preset height of the pressure cap 12a at the top of the pressure rod 12. This adjusts the set height of the cleaning cover 5 when the top rod 14 is lowered and pressed against the pressure cap 12a, thereby changing the set height of the waste discharge chamber to adjust the amount of wastewater discharged per batch as needed. This invention integrates a filter cartridge 3, a movable cleaning cover 5, and a drive disc 6 inside the housing 1. The drive disc 6 pulls the cleaning cover 5 up and down to slide, serving as a cleaning component for the inner wall of the filter cartridge 3 and a pressurizing component for the water injection chamber below. This eliminates the need for an additional pressurizing device connected outside the filter chamber, thereby minimizing the overall size of the device and making it more suitable for installation spaces in household daily water use and small commercial water use areas. The installation and maintenance process is also simpler.

[0028] The drive disc 6 drives the cleaning cover 5 to move up and down, so that the pressure in the water injection chamber changes synchronously, realizing dynamic regulation of water pressure, replacing the traditional unidirectional continuous pressurization filtration method; it can avoid the drawback of excessive adhesion of impurities on the filter element surface due to continuous unidirectional pressurization, thus ensuring smooth water passage, significantly improving the filtration effect, and also helping to extend the service life of the reverse osmosis membrane. The cleaning cover 5, which is equipped with a pressure regulating component, is designed to switch between pressurization and depressurization. This allows for the active water intake and injection function of the water injection chamber, enabling automatic water intake and filtration when the tap water supply is interrupted or there is no tap water available, thus meeting the needs of more usage scenarios. The wastewater hopper 16 and the rotatable inclined baffle 10 work together to ensure smooth wastewater discharge, reduce the residue of wastewater and impurities on the filter cartridge 3, and lower the risk of pollution to the subsequent raw water. In addition, the wastewater discharge ratio can be flexibly adjusted according to the actual cleanliness of the raw water by adjusting the height of the pressure rod 12. This avoids water waste caused by excessive wastewater volume and prevents the problem of impurities remaining in the reverse osmosis membrane caused by insufficient wastewater volume.

[0029] The cleaning mechanism, consisting of the cleaning hood 5 and the drive mechanism, eliminates the need to stop the machine to disassemble the internal parts of the cleaning unit and to lay additional pure water backwash pipes. During the operation of the equipment, the cleaning hood 5 is driven up and down by the drive disc 6 to scrape and clean the inner wall of the filter cartridge 3 and the membrane layer 4. The cleaning action of the inner wall is completed synchronously by the movement of the pressurization component, which simplifies the equipment structure and optimizes the cleaning function.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A reverse osmosis water treatment device based on a reverse osmosis membrane, characterized in that: The filter cartridge (3) includes a housing (1) and a filter element (3) fixed inside the housing (1). The top of the housing (1) is provided with a top cover (2) that seals the top opening of the filter element (3). The outer wall of the filter element (3) is covered with a membrane layer (4) to form a reverse osmosis membrane assembly. A cleaning cover (5) is vertically slidably disposed inside the filter element (3), and a drive disc (6) is movably disposed inside the cleaning cover (5). An inner cover (9) is provided inside the filter element (3), and the inner cavity of the filter element (3) between the inner cover (9) and the cleaning cover (5) forms a water injection chamber. The pressure in the water injection chamber moves with the cleaning cover (5). Synchronous changes, the bottom end of the filter cartridge (3) is fixed with a support ring (15), the bottom side of the support ring (15) is hinged with a baffle (10) that can open and close the bottom opening of the filter cartridge (3), a drive mechanism is provided between the inner cover (9) and the top cover (2) to pull the drive disc (6) to drive the cleaning cover (5) to slide up and down, a transfer pipe (13) is provided on the drive disc (6) to connect the water injection chamber, the transfer pipe (13) extends spirally between the cleaning cover (5) and the top cover (2), and the top end of the transfer pipe (13) extends out of the top cover (2) and is connected to the raw water pipe (19).

2. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 1, characterized in that: The outer wall of the filter cartridge (3) is densely covered with water passage holes (301). The cleaning cover (5) includes a cover (501) whose outer wall is flush with the inner wall of the filter cartridge (3). A cover cylinder (502) is fixed on the top side of the cover (501). The cover cylinder (502) and the cover (501) form a valve cavity for accommodating the vertical sliding of the drive disc (6). A sliding hole (501a) is passed through the eccentric part of the top of the cover (501) to accommodate the bottom end of the transfer pipe (13). The sliding hole (501a) is in clearance fit with the outer wall of the transfer pipe (13).

3. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 2, characterized in that: The outer wall of the cover (502) is provided with a plurality of through-hole water injection holes (505), and the outer circumference of the drive disc (6) is provided with an annular groove water injection groove (602). When the drive disc (6) slides down and abuts against the bottom surface of the valve cavity, the water injection groove (602) and the water injection hole (505) are misaligned and closed. When the drive disc (6) slides up and abuts against the top surface of the valve cavity, the water injection groove (602) and the water injection hole (505) overlap and open, so that the transfer pipe (13) can be connected to the lower water injection cavity in sequence through the water injection groove (602) and the water injection hole (505).

4. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 3, characterized in that: The top surface of the drive disc (6) is provided with a mounting hole (601) corresponding to the sliding hole (501a) that connects to the water injection tank (602). The bottom end of the transfer pipe (13) is inserted into the mounting hole (601) and is press-fitted with the mounting hole (601). The top side of the cover (501) is provided with an upper telescopic sleeve (503) connected to the bottom surface of the top cover (2). The bottom surface of the cover cylinder (502) is provided with a lower telescopic sleeve (504) connected to the top surface of the inner cover (9).

5. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 4, characterized in that: The driving mechanism includes two sets of fixed pulleys (8) symmetrically fixed on opposite sides of the top cover (2) and the inner cover (9). A steel wire rope (7) is wound between the two sets of fixed pulleys (8) to pull the driving disk (6) to drive the cleaning cover (5) to move up and down. The steel wire rope (7) is in the shape of a ring. The driving disk (6) is provided with a hoop (603) and a receiving hole (604). The two sides of the steel wire rope (7) pass through the hoop (603) and the receiving hole (604) respectively. The receiving hole (604) is clearance-fitted with one side of the steel wire rope (7), and the driving disk (6) is fixedly connected to the other side of the steel wire rope (7) through the hoop (603).

6. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 5, characterized in that: The cover (501) is a ring structure that accommodates the wire rope (7) passing through. The bottom of the cover (502) is provided with two sets of guide holes (506) that accommodate the wire rope (7) passing through on both sides. One set of fixed pulleys (8) is externally connected to a motor.

7. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 1, characterized in that: The bottom of the cleaning cover (5) is provided with a vertically extending top rod (14) near the hinge side of the baffle (10) and the support ring (15). The inner cover (9) has a clearance hole (901) through which the top rod (14) extends downward. The baffle (10) below the top rod (14) is provided with a pressure rod (12), and a self-sealing part (11) connecting the support ring (15) is provided on the side of the baffle (10) away from the pressure rod (12).

8. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 7, characterized in that: A rotating shaft (10a) is provided on the outer side of the baffle (10), and a rotating ear (15a) is provided on the bottom surface of the support ring (15) to support the rotation of the baffle (10) in conjunction with the rotating shaft (10a). A multi-ring nested lower sealing ring (10b) is coaxially provided on the top surface of the baffle (10), and a threaded sleeve (10c) is fixed on the baffle (10) to accommodate the vertical penetration of the pressure rod (12). The pressure rod (12) is threadedly engaged with the threaded sleeve (10c), and a pressure cap (12a) is fixed at the top of the pressure rod (12) to accommodate the bottom end of the top rod (14). A knob (12b) is fixed at the bottom end of the pressure rod (12).

9. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 8, characterized in that: The support ring (15) is provided with a limiting groove (15b) for accommodating the self-sealing component (11) that extends vertically. The self-sealing component (11) includes a screw (11a) that is vertically fixed to the top side of the baffle (10) and extends through the limiting groove (15b). A washer is sleeved on the outside of the screw (11a). A spring (11b) is sleeved on the top of the screw (11a) to keep the washer pressed against the top surface of the support ring (15). An upper sealing ring (15c) is provided on the top surface of the support ring (15) to alternately press against the lower sealing ring (10b).

10. The reverse osmosis water treatment device based on a reverse osmosis membrane according to claim 1, characterized in that: The support ring (15) is detachably provided with a wastewater hopper (16) on the outside. The bottom of the wastewater hopper (16) is connected to an outwardly extending wastewater pipe (17). The housing (1) includes a separable upper half-shell (101) and a lower half-shell (102). The bottom side of the lower half-shell (102) is connected to a pure water pipe (18). The top cover (2) is provided with a raw water pipe (19) connected to the top opening of the transfer pipe (13) on the outside.

Images