RO water purifying device with self-pressurization and double water outlet functions

Abstract

The utility model discloses a kind of RO water purification device with self-boosting and double water outlet function, it includes shell assembly, coarse filter core, RO membrane filter core and water inlet and outlet assembly;The bottom of shell assembly is respectively penetrated with water inlet, pure water outlet, coarse filtration water outlet, first concentrated water outlet and second concentrated water outlet;Water inlet and outlet assembly includes water inlet mechanism, pure water mechanism, concentrated water mechanism and water purification mechanism;Water inlet mechanism is connected with water inlet communication;Pure water mechanism is connected with pure water outlet communication;Concentrated water mechanism is connected with second concentrated water outlet communication;Water purification mechanism is connected with coarse filtration water outlet, first concentrated water outlet communication respectively;Pure water mechanism, concentrated water mechanism are respectively penetrated and set on four-way valve.The utility model passes through the mutual cooperation of shell assembly, coarse filter core, RO membrane filter core and water inlet and outlet assembly, effectively solve the problem that existing RO water purification device needs external power supply to boost to work normally.

Description

Technical Field

[0001] This utility model relates to the field of water purifier technology, and in particular to an RO water purification device with self-pressurization and dual water outlet functions. Background Technology

[0002] RO water purification, also known as RO reverse osmosis, is a process that uses internationally popular reverse osmosis methods to filter raw water (physical method) and produce pure water suitable for direct human consumption without adding any compounds (also known as point-of-use water purification equipment). Currently, most household RO water purifiers on the market require a booster pump to pressurize the water to meet the operating conditions of the RO membrane. This means most household RO water purifiers require an external power source, which is inconvenient in areas with limited power supply, thus restricting their use. While other water purifiers, primarily ultrafiltration machines, do not require external power, they do not achieve the same purification effect as RO membranes. Additionally, there are RO membrane water purifiers that do not require an external power source, but they lack dual-outlet functionality and water quality monitoring displays. Therefore, this paper proposes an RO water purification device with self-pressurization and dual-outlet functions to solve the above problems. Summary of the Invention

[0003] One of the purposes of this utility model is to provide an RO water purifier with self-pressurization and dual water output functions, so as to solve the problem that existing RO water purifiers require an external power supply for pressurization to work properly.

[0004] This utility model discloses an RO water purification device with self-pressurization and dual water outlet functions, which can be achieved through the following technical solutions:

[0005] This utility model discloses an RO water purification device with self-pressurization and dual-outlet functions, comprising: a shell assembly, which is a hollow sealed cavity, wherein an inlet, a pure water outlet, a coarse filter outlet, a first concentrate outlet, and a second concentrate outlet are respectively provided through the bottom of the shell assembly; a coarse filter element, which is detachably connected to the shell assembly; an RO membrane filter element, which is detachably connected to the shell assembly and disposed in the coarse filter element; an inlet / outlet assembly, which includes an inlet mechanism, a pure water mechanism, a concentrate mechanism, and a purification mechanism respectively provided through the lower end of the shell assembly; the inlet mechanism is connected to the inlet; the pure water mechanism is connected to the pure water outlet; the concentrate mechanism is connected to the second concentrate outlet; the purification mechanism is connected to the coarse filter outlet and the first concentrate outlet respectively; and a four-way valve fixedly disposed in the lower end of the shell assembly, wherein the pure water mechanism and the concentrate mechanism are respectively disposed through the four-way valve.

[0006] In one embodiment, the water inlet mechanism includes a first water inlet connecting pipe, a water inlet pipe, and a second water inlet connecting pipe connected in sequence; the first water inlet connecting pipe is disposed through the lower end of the housing assembly, and the second water inlet connecting pipe is connected to the water inlet; it also includes a first TDS probe disposed on the water inlet pipe.

[0007] In one embodiment, the pure water mechanism includes a first pure water connecting pipe, a pure water pipe, and a second pure water connecting pipe connected in sequence; the first pure water connecting pipe is connected to the pure water outlet; the pure water pipe passes through the four-way valve; the second pure water connecting pipe passes through the lower end of the housing assembly; and a second TDS probe and a pure water flow meter are respectively disposed on the pure water pipe.

[0008] In one embodiment, the RO water purification device of the present invention with self-pressurization and dual water output functions further includes a control and display component, which is disposed on the outside of the housing assembly and is electrically connected to the first TDS probe and the second TDS probe, respectively.

[0009] In one embodiment, the control display assembly includes a fixed cavity; a circuit board and a dry cell battery respectively disposed in the fixed cavity, the circuit board being electrically connected to the first TDS probe, the second TDS probe, and the dry cell battery respectively; and a display screen and buttons respectively disposed through the fixed cavity and electrically connected to the circuit board respectively.

[0010] In one embodiment, the concentrated water mechanism includes a first concentrated water connecting pipe, a concentrated water pipeline, and a second concentrated water connecting pipe connected in sequence; the first concentrated water connecting pipe is connected to the second concentrated water outlet; the concentrated water pipeline passes through the four-way valve; and the second concentrated water connecting pipe passes through the lower end of the housing assembly.

[0011] In one embodiment, the water purification mechanism includes a third concentrated water connecting pipe and a coarse filtered water connecting pipe, which are respectively connected to the first concentrated water outlet and the coarse filtered water outlet; a purified water connecting pipe that passes through the lower end of the housing assembly; and purified water pipes that are respectively connected to the third concentrated water connecting pipe, the coarse filtered water connecting pipe, and the purified water connecting pipe.

[0012] In one embodiment, the housing assembly includes a main housing, which is a hollow cavity with one end open; a lower cover plate fixedly disposed at the lower end of the main housing, and the water inlet / outlet assembly fixedly disposed through the cavity formed by the main housing and the lower cover plate; and an upper sealing cover detachably and sealingly connected to the upper end of the main housing.

[0013] In one embodiment, the inner wall of the main housing is provided with an internal thread; the upper sealing cover is provided with an external thread, and the external thread is detachably threaded onto the internal thread.

[0014] In one embodiment, the coarse filter element is made of PP cotton and sintered carbon filter element.

[0015] Compared with the prior art, the beneficial effects of this utility model of an RO water purification device with self-pressurization and dual water output functions are as follows:

[0016] This utility model discloses an RO water purifier with self-pressurization and dual water outlet functions. The housing assembly employs a closed-cavity design, utilizing the inherent pressure of the water itself to achieve automatic pressurization. It can be used as long as there is water in the housing assembly, thus broadening the application scenarios of the RO water purifier. Simultaneously, a four-way valve is installed through both the pure water mechanism and the concentrated water mechanism, effectively solving the problem that existing RO water purifiers require an external power supply for pressurization to operate normally. The pure water outlet of the RO membrane filter is connected to the pure water mechanism, facilitating direct supply of pure water to users. Furthermore, two concentrated water outlets are provided on the concentrated water outlet of the RO membrane filter: one is the normal concentrated water discharge channel, and the other is connected to… The water filtered through the coarse filter is then discharged in parallel as purified water from the water purification system. This facilitates washing fruits and vegetables while also forcibly rinsing the RO membrane filter, thus extending its lifespan. A control display component on the outside of the housing allows users to directly see the raw water quality and the RO purified water quality on the screen, providing a clear view of the purification effect and the RO membrane filter's status, enhancing user experience and satisfaction. A pure water flow meter installed in the pure water pipeline records the total water produced by the RO membrane filter, effectively preventing it from exceeding its service life or requiring premature replacement, thus ensuring drinking water safety and avoiding waste. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an RO water purification device with self-pressurization and dual water outlet functions according to this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of an RO water purification device with self-pressurization and dual water outlet functions according to this utility model;

[0020] Figure 3 This is an exploded structural diagram of an RO water purification device with self-pressurization and dual water outlet functions according to the present invention, including a shell assembly and an inlet / outlet water assembly;

[0021] Figure 4 yes Figure 3 The exploded structural diagram of the housing assembly shown includes the main housing;

[0022] Figure 5 yes Figure 4 The diagram shows the structural schematic of the main housing.

[0023] Figure 6 yes Figure 3 The diagram shows the structure of the inlet and outlet water assembly.

[0024] The diagram indicates: 10, RO water purification device; 11, housing assembly; 111, main housing; 1111, internal thread; 1112, inlet; 1113, pure water inlet; 1114, coarse filter inlet; 1115, first concentrate inlet; 1116, second concentrate inlet; 112, lower cover; 1121, through hole; 113, upper sealing cover; 1131, external thread; 1132, rotating cover; 12, coarse filter element; 13, RO membrane filter element; 14, Water inlet / outlet assembly; 141, water inlet mechanism; 1411, first water inlet connecting pipe; 1412, water inlet pipe; 1413, second water inlet connecting pipe; 1414, first TDS probe; 142, pure water mechanism; 1421, first pure water connecting pipe; 1422, pure water pipe; 1423, second pure water connecting pipe; 1424, second TDS probe; 1425, pure water flow meter; 143, concentrated water mechanism; 1431, first concentrated water connecting pipe; 1432, concentrated water pipe; 1433, second concentrated water connecting pipe; 144, water purification mechanism; 1441, third concentrated water connecting pipe; 1442, coarse filtered water connecting pipe; 1443, purified water pipe; 1444, purified water connecting pipe; 145, four-way valve; 15, control and display assembly; 151, fixed cavity; 152, display screen. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] Please see Figures 1-3 As shown, the present invention discloses an RO water purification device 10 with self-pressurization and dual-outlet functions, comprising a housing assembly 11, a coarse filter element 12, an RO membrane filter element 13, an inlet / outlet water assembly 14, and a control and display assembly 15. The housing assembly 11 is a hollow, sealed cavity. The coarse filter element 12 is detachably connected to the housing assembly 11 and performs coarse filtration on the raw water in the housing assembly 11. The RO membrane filter element 13 is detachably connected to the housing assembly 11 and disposed within the coarse filter element 12, and performs a second filtration on the purified water treated by the coarse filter element 12, thereby obtaining pure water that can be directly consumed. The inlet / outlet water assembly 14 is fixedly disposed through the bottom of the housing assembly 11 and is connected to the housing assembly 11, and performs water inlet and dual-outlet water operation through the inlet / outlet water assembly 14. The control and display assembly 15 is disposed on the outside of the housing assembly 11 and is electrically connected to the inlet / outlet water assembly 14, and performs water quality monitoring and display operation through the control and display assembly 15.

[0028] Please see Figures 1-4 As shown, in this embodiment, the housing assembly 11 includes a main housing 111, a lower cover plate 112, and an upper sealing cover 113; the main housing 111 is a hollow cavity with one end open; the lower cover plate 112 is fixedly disposed at the lower end of the main housing 111, and the water inlet / outlet assembly 14 is fixedly disposed through the cavity formed by the main housing 111 and the lower cover plate 112 and is connected to the main housing 111; the upper sealing cover 113 is detachably and sealingly connected to the upper end of the main housing 111.

[0029] Please see Figure 4 and Figure 5As shown, specifically, an internal thread 1111 is provided on the inner wall of the end of the main housing 111 opposite to the upper sealing cover 113, and the upper sealing cover 113 is detachably threaded to the main housing 111 through the internal thread 1111; the bottom of the main housing 111 is respectively provided with an inlet 1112, a pure water outlet 1113, a coarse filter outlet 1114, a first concentrate outlet 1115, and a second concentrate outlet 1116; the inlet 1112 is located between the inner wall of the main housing 111 and the outer side of the coarse filter element 12, and the inlet / outlet water assembly 14 delivers tap water (raw water) into the main housing 111 through the inlet 1112; the pure water outlet 1113 is connected to the RO membrane. The pure water outlet of filter element 13 is connected to the pure water of RO membrane filter element 13, which enters the inlet and outlet water assembly 14 through pure water port 1113. The coarse filtration port 1114 is located between coarse filter element 12 and RO membrane filter element 13, and the coarse filtered water after filtration by coarse filter element 12 enters the inlet and outlet water assembly 14 through coarse filtration port 1114. The first concentration port 1115 and the second concentration port 1116 are respectively connected to the concentrated water outlet of RO membrane filter element 13, and the concentrated water after filtration by RO membrane filter element 13 enters the inlet and outlet water assembly 14 through the first concentration port 1115 and the second concentration port 1116 respectively.

[0030] Please see Figure 3 and Figure 4 As shown, specifically, the lower cover plate 112 has multiple through holes 1121, through which the water inlet / outlet assembly 14 passes. The upper sealing cover 113 has an external thread 1131, which is detachably threaded onto the internal thread 1111, thereby allowing the lower cover plate 112 to be detachably and fixedly connected to the main housing 111. A rotating cover 1132 is also fixedly mounted on the upper sealing cover 113, allowing the upper sealing cover 113 to be easily removed from the main housing 111. Specifically, a sealing ring is provided at the connection between the main housing 111 and the upper sealing cover 113, enhancing the sealing performance between the main housing 111 and the upper sealing cover 113. The sealing ring is made of silicone.

[0031] Please see Figure 2 and Figure 3 As shown, in this embodiment, the coarse filter element 12 is made of PP cotton and sintered carbon filter element; the RO membrane filter element 13 uses existing technology, so its specific working process and structure will not be described in detail here, as long as it meets the requirements of this application.

[0032] Please see Figure 2 , Figure 3 and Figure 6As shown, in this embodiment, the water inlet / outlet assembly 14 includes a water inlet mechanism 141, a pure water mechanism 142, a concentrated water mechanism 143, a purified water mechanism 144, and a four-way valve 145. The water inlet mechanism 141 is fixedly disposed through the lower end of the housing assembly 11 and connected to the water inlet 1112. It is electrically connected to the control and display assembly 15. Tap water (raw water) enters the main housing 111 sequentially through the water inlet mechanism 141 and the water inlet 1112. The water inlet mechanism 141 can detect the water quality of the tap water (raw water) entering the main housing 111 in real time. The pure water mechanism 142 is fixedly disposed through the lower end of the housing assembly 11 and connected to the pure water inlet 1113. Pure water filtered by the RO membrane filter element 13 enters the pure water mechanism 142 through the pure water inlet 1113 and is discharged. The concentrated water mechanism... The RO membrane filter element 13 is fixedly installed through the lower end of the housing assembly 11 and connected to the second concentrate port 1116. The concentrated water after being filtered by the RO membrane filter element 13 enters the concentrated water mechanism 143 through the second concentrate port 1116 and is discharged. The water purification mechanism 144 is fixedly installed through the lower end of the housing assembly 11 and connected to the coarse filter port 1114 and the first concentrate port 1115 respectively. The coarsely filtered water after being filtered by the coarse filter element 12 enters the water purification mechanism 144 through the filter port 1114 and is discharged. The concentrated water after being filtered by the RO membrane filter element 13 enters the water purification mechanism 144 through the first concentrate port 1115 and is discharged. The four-way valve 145 is fixedly installed in the lower end of the housing assembly 11. The pure water mechanism 142 and the concentrated water mechanism 143 are respectively installed through the four-way valve 145.

[0033] Please see Figure 3 and Figure 6 As shown, specifically, the water inlet mechanism 141 includes a first water inlet connecting pipe 1411, a water inlet pipe 1412, a second water inlet connecting pipe 1413, and a first TDS probe 1414; the first water inlet connecting pipe 1411, the water inlet pipe 1412, and the second water inlet connecting pipe 1413 are connected in sequence, the first water inlet connecting pipe 1411 is disposed through the lower end of the housing assembly 11, and the second water inlet connecting pipe 1413 is connected to the water inlet 1112; the first TDS probe 1414 is disposed on the water inlet pipe 1412 and electrically connected to the control and display assembly 15, and the water quality of the tap water (raw water) passing through the water inlet pipe 1412 is detected in real time by the first TDS probe 1414 and displayed in real time on the control and display assembly 15.

[0034] Please see Figure 3 and Figure 6As shown, specifically, the pure water mechanism 142 includes a first pure water connecting pipe 1421, a pure water pipe 1422, a second pure water connecting pipe 1423, a second TDS probe 1424, and a pure water flow meter 1425; the first pure water connecting pipe 1421, the pure water pipe 1422, and the second pure water connecting pipe 1423 are sequentially connected; the first pure water connecting pipe 1421 is connected to the pure water inlet 1113; the pure water pipe 1422 is installed through the four-way valve 145; the second pure water connecting pipe 1423 is installed through the lower end of the housing assembly 11; and the second TDS probe 1424... 424. Pure water flow meters 1425 are respectively installed on pure water pipes 1422 and electrically connected to control and display components 15. The second TDS probe 1424 detects the water quality of pure water passing through pure water pipes 1422 in real time and displays it on the control and display components 15 in real time, so that users can understand the filtration performance of RO membrane filter element 13. The function of pure water flow meters 1425 is to record the total amount of water produced by RO membrane filter element 13, effectively preventing RO membrane filter element 13 from exceeding its service life or being replaced prematurely, thereby ensuring drinking water safety and avoiding waste.

[0035] Please see Figure 3 and Figure 6 As shown, specifically, the concentrated water mechanism 143 includes a first concentrated water connecting pipe 1431, a concentrated water pipe 1432, and a second concentrated water connecting pipe 1433; the first concentrated water connecting pipe 1431, the concentrated water pipe 1432, and the second concentrated water connecting pipe 1433 are connected in sequence, the first concentrated water connecting pipe 1431 is connected to the second concentrated water inlet 1116, the concentrated water pipe 1432 is installed through the four-way valve 145, and the second concentrated water connecting pipe 1433 is installed through the lower end of the housing assembly 11.

[0036] Please see Figure 3 and Figure 6 As shown, specifically, the water purification mechanism 144 includes a third concentrated water connecting pipe 1441, a coarse filtered water connecting pipe 1442, a purified water pipe 1443, and a purified water connecting pipe 1444; the third concentrated water connecting pipe 1441 and the coarse filtered water connecting pipe 1442 are respectively connected to the first concentrated water inlet 1115 and the coarse filtered water inlet 1114, and the purified water pipe 1443 is respectively connected to the third concentrated water connecting pipe 1441, the coarse filtered water connecting pipe 1442, and the purified water connecting pipe 1444, and the purified water connecting pipe 1444 is disposed through the lower end of the housing assembly 11.

[0037] Please see Figures 1-3As shown, in this embodiment, the control and display assembly 15 includes a fixed cavity 151, a display screen 152, a circuit board, a dry cell battery, and buttons. The fixed cavity 151 is a central cavity that is fixedly disposed on the outside of the housing assembly 11. The circuit board and the dry cell battery are respectively disposed in the fixed cavity 151. The circuit board is electrically connected to the display screen 152, the first TDS probe 1414, the second TDS probe 1424, the dry cell battery, and the buttons. The control technology used is existing technology, so the specific control process and product model are not described here, as long as they meet the requirements of this application. The display screen 152 and the buttons are respectively disposed through the fixed cavity 151. The display screen 152 displays the water quality of the RO water purifier 10 and the power of the dry cell battery in real time, and the buttons are used to turn the RO water purifier 10 on and off and set its functions.

[0038] It should be noted that the specific working process of the RO water purification device 10 with self-pressurization and dual water outlet functions of this utility model is as follows: tap water (raw water) enters the sealed main housing 111 sequentially through the water inlet mechanism 141 and the water inlet 1112; the tap water (raw water) passes through the coarse filter element 12 and the RO membrane filter element 13 for filtration, and the coarse filtered water in the coarse filter element 12 enters the water purification unit 144 sequentially through the coarse filter water outlet 1114; the pure water filtered by the RO membrane filter element 13 enters the pure water unit sequentially through the pure water outlet 1113. In section 142, the concentrated water filtered by the RO membrane filter element 13 enters the water purification unit 144 and the concentrated water unit 143 through the first concentrated water port 1115 and the second concentrated water port 1116, respectively. Users can directly drink the pure water discharged from the pure water unit 142, or use the purified water discharged from the purified water unit 144 to wash fruits and vegetables. While the purified water unit 144 is draining water, it also performs a forced flushing operation on the RO membrane filter element 13, which extends the service life of the RO membrane filter element 13 to a certain extent, thereby realizing the dual water output operation of the RO water purification device 10.

[0039] 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 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.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An RO water purification device with self-pressurization and dual water outlet functions, characterized in that, include: The housing assembly is a hollow, sealed cavity, and the bottom of the housing assembly is respectively provided with a water inlet, a pure water inlet, a coarse filter water inlet, a first concentrated water inlet, and a second concentrated water inlet; A coarse filter element, which is detachably connected to the housing assembly; An RO membrane filter element, which is detachably connected to the housing assembly and disposed in the coarse filter element; The water inlet and outlet assembly includes a water inlet mechanism, a pure water mechanism, a concentrated water mechanism, and a purified water mechanism, which are respectively disposed through the lower end of the housing assembly; the water inlet mechanism is connected to the water inlet; the pure water mechanism is connected to the pure water outlet; the concentrated water mechanism is connected to the second concentrated water outlet; the purified water mechanism is connected to the coarse filter outlet and the first concentrated water outlet respectively; and it also includes a four-way valve, on which the pure water mechanism and the concentrated water mechanism are respectively disposed.

2. The RO water purification device with self-pressurization and dual water outlet functions according to claim 1, characterized in that, The water inlet mechanism includes a first water inlet connecting pipe, a water inlet pipe, and a second water inlet connecting pipe connected in sequence; the first water inlet connecting pipe is disposed through the lower end of the housing assembly, and the second water inlet connecting pipe is connected to the water inlet; it also includes a first TDS probe disposed on the water inlet pipe.

3. The RO water purification device with self-pressurization and dual water outlet functions according to claim 2, characterized in that, The pure water mechanism includes a first pure water connecting pipe, a pure water pipeline, and a second pure water connecting pipe connected in sequence; the first pure water connecting pipe is connected to the pure water outlet; the pure water pipeline passes through the four-way valve; the second pure water connecting pipe passes through the lower end of the housing assembly; and a second TDS probe and a pure water flow meter are respectively installed on the pure water pipeline.

4. The RO water purification device with self-pressurization and dual water outlet functions according to claim 3, characterized in that, It further includes a control display component disposed on the outside of the housing component and electrically connected to the first TDS probe and the second TDS probe, respectively.

5. The RO water purification device with self-pressurization and dual water outlet functions according to claim 4, characterized in that, The control and display assembly includes a fixed cavity; a circuit board and a dry cell battery respectively disposed in the fixed cavity, the circuit board being electrically connected to the first TDS probe, the second TDS probe, and the dry cell battery respectively; and a display screen and buttons respectively disposed through the fixed cavity and electrically connected to the circuit board respectively.

6. The RO water purification device with self-pressurization and dual water outlet functions according to claim 1, characterized in that, The concentrated water mechanism includes a first concentrated water connecting pipe, a concentrated water pipeline, and a second concentrated water connecting pipe connected in sequence; the first concentrated water connecting pipe is connected to the second concentrated water outlet; the concentrated water pipeline passes through the four-way valve; and the second concentrated water connecting pipe passes through the lower end of the housing assembly.

7. The RO water purification device with self-pressurization and dual water outlet functions according to claim 1, characterized in that, The water purification mechanism includes a third concentrated water connecting pipe and a coarse filtered water connecting pipe, which are respectively connected to the first concentrated water outlet and the coarse filtered water outlet; a purified water connecting pipe that passes through the lower end of the housing assembly; and purified water pipes that are respectively connected to the third concentrated water connecting pipe, the coarse filtered water connecting pipe, and the purified water connecting pipe.

8. The RO water purification device with self-pressurization and dual water outlet functions according to claim 1, characterized in that, The housing assembly includes a main housing, which is a hollow cavity with one open end; a lower cover plate fixedly disposed at the lower end of the main housing; the water inlet / outlet assembly being fixedly disposed through the cavity formed by the main housing and the lower cover plate; and an upper sealing cover detachably and sealingly connected to the upper end of the main housing.

9. The RO water purification device with self-pressurization and dual water outlet functions according to claim 8, characterized in that, The inner wall of the main housing is provided with an internal thread; the upper sealing cover is provided with an external thread, and the external thread is detachably threaded to the internal thread.

10. An RO water purification device with self-pressurization and dual-outlet functions according to any one of claims 1-9, characterized in that, The coarse filter element is made of PP cotton and sintered carbon filter element.

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