Filter element device and water purification equipment

Abstract

The utility model discloses a filter element device and water purification equipment, and relates to the technical field of water purification, the filter element device comprises a shell, a filter assembly, a mounting piece and a valve body assembly, a cavity is arranged in the shell; the shell is provided with a water inlet and outlet structure, and the water inlet and outlet structure comprises three water inlets and outlets; the water inlet / outlet is provided with a limiting structure; the filtering assembly is arranged in the cavity; the mounting piece is arranged in the cavity; the mounting piece is connected with one end of the filtering assembly; three mounting grooves are formed in the mounting piece in the direction facing the water inlet and outlet structure, and hollow structures are arranged on the sides, facing the filtering assembly, of the mounting grooves; the valve body assembly comprises three water stop valves, the three water stop valves are correspondingly arranged in the three mounting grooves, and the ends, away from the hollow structure, of the water stop valves abut against the limiting structure; the water stop valve is used for controlling connection and disconnection between the hollow structure and the water inlet and outlet. The water stop valve is installed and limited by adopting a limiting structure that the installation groove is matched with the water inlet and the water outlet, and the water stop valve does not need to be installed in a mode of welding a pressing plate through ultrasonic waves.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and in particular to a filter cartridge device and a water purification equipment. Background Technology

[0002] Currently, some filter elements are equipped with a water stop valve. After the water stop valve is installed inside the filter element, an ultrasonic welding plate is needed to seal the filter element. However, ultrasonic welding of the plate may reduce the pressure resistance of the filter element and increase the risk of water leakage. Furthermore, in actual production, ultrasonic welding may cause weld damage and burrs on the filter element, thus affecting the production quality of the filter element.

[0003] Therefore, there is an urgent need for a new type of filter cartridge device to solve the problems of low pressure bearing capacity and low production yield of existing filter cartridge devices with water stop valves. Utility Model Content

[0004] The main purpose of this utility model is to propose a filter cartridge device and a water purification equipment, which aims to solve the problems of low pressure bearing capacity and low production yield of existing filter cartridge devices with water stop valves.

[0005] To achieve the above objectives, the filter element device proposed in this utility model includes a housing, a filter assembly, a mounting component, and a valve body assembly. The housing has an internal cavity; the housing has an inlet / outlet structure, which includes three inlet / outlet ports; the inlet / outlet ports are equipped with limiting structures; the filter assembly is located within the cavity; the mounting component is located within the cavity; the mounting component is connected to one end of the filter assembly; the mounting component has three mounting grooves facing the inlet / outlet structure, and the side of the mounting groove facing the filter assembly has a perforated structure; the valve body assembly includes three stop valves, which are correspondingly located in the three mounting grooves, and the end of the stop valve away from the perforated structure abuts against the limiting structure; the stop valves are used to control the connection and interruption between the perforated structure and the inlet / outlet ports.

[0006] In one embodiment, the mounting member has an extension section extending toward the inlet and outlet, and three mounting grooves are formed in the extension section; a first slot structure is provided on one side of the mounting member with the extension section, and a first extension structure extending toward the first slot structure is provided on the inner wall of the housing, and the first extension structure is engaged with the first slot structure to achieve a fit.

[0007] In one embodiment, the filtration assembly includes a reverse osmosis membrane filter element, with one end of the reverse osmosis membrane filter element facing the mounting member connected to the mounting member; the reverse osmosis membrane filter element is annular, and a first fluid channel is formed between the outer wall of the reverse osmosis membrane filter element and the cavity wall of the cavity, the first fluid channel communicating with a first mounting groove; a second fluid channel is formed between the outer wall and the inner wall of the reverse osmosis membrane filter element, the second fluid channel communicating with a second mounting groove, and the first fluid channel communicating with the second fluid channel.

[0008] In one embodiment, the filtration assembly further includes a filter element tube, one end of which is connected to the mounting component; a reverse osmosis membrane filter element is sleeved on the outer periphery of the filter element tube; a third fluid channel is formed inside the filter element tube, which communicates with a third mounting groove; the filter element tube has several notches, which communicate with the inner wall of the reverse osmosis membrane filter element.

[0009] In one embodiment, the mounting member has a first sleeve structure extending vertically at one end facing the filter tube, the first sleeve structure being sleeved and engaged with the bottom of the filter tube; and / or, the mounting member has a second sleeve structure extending vertically at one end facing the reverse osmosis membrane filter element, the second sleeve structure being located outside the first sleeve structure, the second sleeve structure being sleeved and engaged with the bottom of the reverse osmosis membrane filter element.

[0010] In one embodiment, a sealing structure is provided at one end of the filter tube facing away from the mounting member. The sealing structure is located above several notches and is used to prevent the fluid in the third fluid channel from moving vertically upward.

[0011] In one embodiment, the filter element device further includes a filter element cover, one of the bottom of the filter element cover and the top of the housing having a second slot structure, and the other having a second extension structure extending toward the second slot structure, the second extension structure being engaged with the second slot structure to achieve a fit.

[0012] In one embodiment, the bottom of the filter element cover is spin-welded to the top of the housing to form an integral structure.

[0013] In one embodiment, the bottom of the filter element tube is provided with a first sealing element, and the filter element tube is sealed to the mounting component through the first sealing element; and / or, the bottom of the stop valve is provided with a second sealing element, and the bottom of the stop valve is sealed to the limiting structure through the second sealing element.

[0014] This utility model also proposes a water purification device, including the above-mentioned filter cartridge device.

[0015] The technical solution of this utility model adopts a filter element device, which includes a housing, a filter assembly, a mounting component, and a valve body assembly. The housing has an internal cavity; the housing has an inlet / outlet structure, which includes three inlet / outlet ports; the inlet / outlet ports have limiting structures; the filter assembly is located in the cavity; the mounting component is located in the cavity; the mounting component is connected to one end of the filter assembly; the mounting component has three mounting grooves facing the inlet / outlet structure, and the side of the mounting groove facing the filter assembly has a hollow structure; the valve body assembly includes three stop valves, which are correspondingly located in the three mounting grooves, and the end of the stop valve away from the hollow structure abuts against the limiting structure; the stop valves are used to control the connection and interruption between the hollow structure and the inlet / outlet ports.

[0016] The technical solution of this utility model involves placing the filter assembly, mounting component, and valve body assembly within a cavity inside the housing, and providing an inlet / outlet structure on the housing to allow water to flow in and out. During the installation of this filter element device, firstly, the mounting component is connected to one end of the filter assembly. Then, three stop valves are correspondingly placed in the three mounting slots of the mounting component. Next, the mounting component and filter assembly are placed within the cavity inside the housing, with the end of the stop valve away from the perforated structure abutting against the limiting structure on the inlet / outlet. This utilizes the mounting component and the limiting structure on the inlet / outlet to limit the movement of the three stop valves. The perforated structure connects the inside of the mounting slot to the inside of the cavity, allowing water to flow through the mounting slot to the filter assembly for filtration, or allowing wastewater or pure water to flow from the cavity to the mounting slot for drainage. When the filter cartridge is working, unfiltered fluids such as tap water enter the filter cartridge through the first inlet / outlet. The unfiltered fluid then continues to pass through the mounting groove and perforated structure corresponding to the first inlet / outlet, and enters the filter assembly through the perforated structure to achieve filtration and produce pure water and wastewater. The wastewater is discharged out of the cavity through the mounting groove and perforated structure corresponding to the second inlet / outlet, and the pure water is discharged out of the cavity through the mounting groove and perforated structure corresponding to the third inlet / outlet. The stop valve is used to allow water to flow in one direction. The first stop valve corresponding to the first mounting groove allows unfiltered fluid to flow in one direction from the outside to the cavity. The second stop valve corresponding to the second mounting groove allows wastewater in the cavity to flow in one direction to the outside of the cavity. The third stop valve corresponding to the third mounting groove allows pure water in the cavity to flow in one direction to the outside of the cavity.

[0017] This utility model's filter cartridge device uses three mounting slots in the mounting component, along with limiting structures within the three inlet and outlet ports, to achieve installation limiting of the three stop valves. This eliminates the need for ultrasonic welding of the pressure plates to install the three stop valves, thus avoiding the limitation of the filter cartridge device's pressure-bearing capacity caused by ultrasonic welding, reducing the risk of water leakage, and preventing weld damage and burrs caused by ultrasonic welding. This ensures that the appearance and performance of the filter cartridge device are not affected by ultrasonic welding, improving the consistency and reliability of the filter cartridge device, enhancing its pressure-bearing capacity, and guaranteeing a high production yield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1A cross-sectional view of an embodiment of the filter element device provided by this utility model;

[0020] Figure 2 An exploded view of another embodiment of the filter element device provided by this utility model;

[0021] Figure 3 An exploded view of another embodiment of the filter element device provided by this utility model.

[0022] Explanation of icon numbers:

[0023] 1. Shell; 11. Inlet / outlet structure; 111. Inlet / outlet; 1111. Limiting structure; 12. First extension structure; 13. Second extension structure; 2. Filter assembly; 21. Reverse osmosis membrane filter element; 22. Filter element tube; 221. Notch; 222. Sealing structure; 3. Mounting component; 31. Mounting groove; 311. Hollowed-out structure; 32. Extension section; 33. First slot structure; 34. First socket structure; 35. Second socket structure; 4. Valve body assembly; 41. Stop valve; 5. First fluid channel; 6. Second fluid channel; 7. Third fluid channel; 8. Filter element cover; 81. Second slot structure.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Currently, some filter elements are equipped with a water stop valve. After the water stop valve is installed inside the filter element, an ultrasonic welding plate is needed to seal the filter element. However, ultrasonic welding of the plate may reduce the pressure resistance of the filter element and increase the risk of water leakage. Furthermore, in actual production, ultrasonic welding may cause weld damage and burrs on the filter element, thus affecting the production quality of the filter element.

[0029] Therefore, there is an urgent need for a new type of filter cartridge device to solve the problems of low pressure bearing capacity and low production yield of existing filter cartridge devices with water stop valves.

[0030] To address the aforementioned problems, this utility model proposes a filter element device.

[0031] Please see Figures 1 to 3 In one embodiment of this utility model, the filter element device includes a housing 1, a filter assembly 2, a mounting component 3, and a valve body assembly 4. The housing 1 has an internal cavity; the housing 1 has an inlet / outlet structure 11, which includes three inlet / outlet ports 111; the inlet / outlet ports 111 are provided with a limiting structure 1111; the filter assembly 2 is disposed in the cavity; the mounting component 3 is disposed in the cavity; the mounting component 3 is connected to one end of the filter assembly 2; the mounting component 3 has three mounting grooves 31 facing the inlet / outlet structure 11, and the mounting grooves 31 have a hollow structure 311 on the side facing the filter assembly 2; the valve body assembly 4 includes three stop valves 41, which are correspondingly disposed in the three mounting grooves 31, and the end of the stop valve 41 away from the hollow structure 311 abuts against the limiting structure 1111; the stop valves 41 are used to control the connection and interruption between the hollow structure 311 and the inlet / outlet ports 111.

[0032] The technical solution of this utility model involves placing the filter assembly 2, the mounting component 3, and the valve body assembly 4 inside the cavity of the housing 1, and providing an inlet / outlet structure 11 on the housing 1 to allow water to flow in and out. During the installation of this filter element device, firstly, the mounting component 3 is connected to one end of the filter assembly 2. Then, three stop valves 41 are correspondingly placed in the three mounting slots 31 of the mounting component 3. Next, the mounting component 3 and the filter assembly 2 are placed inside the cavity of the housing 1, and the end of the stop valve 41 away from the perforated structure 311 abuts against the limiting structure 1111 on the inlet / outlet 111. This utilizes the mounting component 3 and the limiting structure 1111 on the inlet / outlet 111 to limit the movement of the three stop valves 41. The perforated structure 311 connects the inside of the mounting slot 31 with the inside of the cavity, allowing water to flow through the mounting slot 31 and towards the filter assembly 2 for filtration, or allowing wastewater or pure water to flow from the cavity into the mounting slot 31 for drainage. When the filter cartridge device is working, unfiltered fluids such as tap water enter the filter cartridge device through the first inlet / outlet 111. Subsequently, the unfiltered fluid continues to pass through the mounting groove 31 and the hollow structure 311 corresponding to the first inlet / outlet 111, and enters the filter assembly 2 through the hollow structure 311 to achieve filtration and produce pure water and wastewater. The wastewater is discharged out of the cavity along the mounting groove 31 and the hollow structure 311 corresponding to the second inlet / outlet 111, and the pure water is discharged out of the cavity along the mounting groove 31 and the hollow structure 311 corresponding to the third inlet / outlet 111. Among them, the stop valve 41 is used to allow water to flow in one direction. The first stop valve 41 corresponding to the first mounting groove 31 is used to allow unfiltered fluid to flow in one direction from the outside to the cavity. The second stop valve 41 corresponding to the second mounting groove 31 is used to allow wastewater in the cavity to flow in one direction to the outside of the cavity. The third stop valve 41 corresponding to the third mounting groove 31 is used to allow pure water in the cavity to flow in one direction to the outside of the cavity.

[0033] The filter element device of this utility model uses three mounting grooves 31 of the mounting component 3 in conjunction with the limiting structure 1111 in the three inlet and outlet ports 111 to limit the installation of the three stop valves 41. This eliminates the need to use ultrasonic welding pressure plates to install the three stop valves 41, thereby avoiding the limitation of the pressure bearing capacity of the filter element device by ultrasonic welding, reducing the risk of water leakage, and preventing weld damage and burrs caused by ultrasonic welding. This ensures that the appearance and performance of the filter element device are not affected by ultrasonic welding, improves the consistency and reliability of the filter element device, enhances the pressure bearing capacity of the filter element device, and ensures the production yield of the filter element device.

[0034] In an embodiment of this utility model, the mounting member 3 is provided with an extension section 32 extending toward the inlet / outlet 111, and three mounting grooves 31 are formed in the extension section 32; a first slot structure 33 is provided on one side of the mounting member 3 with the extension section 32, and a first extension structure 12 extending toward the first slot structure 33 is provided on the inner wall of the housing 1, and the first extension structure 12 is engaged in the first slot structure 33 to achieve a fit.

[0035] In the above structure, the mounting component 3 has an extension section 32 extending toward the inlet / outlet 111, and three mounting grooves 31 are formed within the extension section 32. These three mounting grooves 31 can be separate, meaning the extension section 32 comprises three separate extension segments, each forming one mounting groove 31. Alternatively, the extension section 32 can be an integral structure, forming three mounting grooves 31. Furthermore, by providing a first slot structure 33 on the side of the mounting component 3 with the extension section 32, and by providing a first extension structure 12 extending toward the first slot structure 33 on the inner wall of the housing 1, the first extension structure 12 engages with the first slot structure 33. This engagement method, where the first extension structure 12 engages with the first slot structure 33, achieves a stable connection between the mounting component 3 and the inner wall of the housing 1, avoiding complex fixing methods such as welding, simplifying the connection operation, improving production efficiency, and facilitating maintenance and replacement of the mounting component 3.

[0036] In an embodiment of this utility model, the filter assembly 2 includes a reverse osmosis membrane filter element 21, with one end of the reverse osmosis membrane filter element 21 facing the mounting member 3 and connected to the mounting member 3; the reverse osmosis membrane filter element 21 is annular, and a first fluid channel 5 is formed between the outer wall of the reverse osmosis membrane filter element 21 and the cavity wall of the cavity, and the first fluid channel 5 is connected to the first mounting groove 31; a second fluid channel 6 is formed between the outer wall and the inner wall of the reverse osmosis membrane filter element 21, and the second fluid channel 6 is connected to the second mounting groove 31, and the first fluid channel 5 is connected to the second fluid channel 6.

[0037] In the above structure, the filtration of unfiltered fluids such as tap water is achieved by using a reverse osmosis membrane filter element 21. This reverse osmosis membrane filter element 21 (i.e., RO membrane filter element) is annular, allowing only water molecules and a small amount of mineral ions to pass through its inner wall, while impurities such as bacteria, viruses, heavy metal ions, and organic matter are trapped between the outer and inner walls of the reverse osmosis membrane element. Therefore, by connecting the end of the reverse osmosis membrane filter element 21 facing the mounting member 3, and forming a first fluid channel 5 between the outer wall of the filter element and the cavity wall of the chamber, this first fluid channel 5 communicates with the first mounting groove 31. Tap water can then be introduced into the first inlet / outlet 111 corresponding to the first mounting groove 31, allowing tap water to flow into the first fluid channel 5. Since a second fluid channel 6 is formed between the outer and inner walls of the reverse osmosis membrane filter element 21, and the first fluid channel 5 communicates with the second fluid channel 6, the first fluid channel... Tap water from the 5th chamber flows into the second fluid channel 6 and is located between the outer and inner walls of the reverse osmosis membrane filter element 21. At this time, the tap water becomes pure water after being filtered through the inner wall of the reverse osmosis membrane filter element 21, while the remaining wastewater remains between the outer and inner walls of the reverse osmosis membrane filter element 21. Since the second fluid channel 6 is connected to the second mounting groove 31, the wastewater between the outer and inner walls of the reverse osmosis membrane filter element 21 can flow along the second fluid channel 6 to the second mounting groove 31, and is finally discharged from the chamber through the second inlet / outlet 111.

[0038] Furthermore, in the above structure, as an optional implementation, the filter assembly 2 may also include a pre-filter and a post-filter. The pre-filter may be located on the outside of the reverse osmosis membrane filter element 21, and the post-filter may be located on the inside of the reverse osmosis membrane filter element 21. This allows unfiltered water, such as tap water, to flow in through the first inlet / outlet 111 and first pass through the pre-filter to obtain pre-filtered water. The pre-filtered water then flows to the reverse osmosis membrane filter element 21 and is filtered into pure water. The pure water then flows to the post-filter and is filtered into post-filtered water. Finally, the post-filtered water flows out of the chamber through the third inlet / outlet 111. This comprehensively utilizes multiple filters and filter elements to improve the filtration effect, which will not be elaborated further here.

[0039] To address the issue of how to discharge the filtered pure water outside the chamber, in this embodiment of the invention, the filter assembly 2 further includes a filter element tube 22, with one end of the filter element tube 22 facing the mounting component 3 connected to the mounting component 3; a reverse osmosis membrane filter element 21 is fitted around the outer periphery of the filter element tube 22; a third fluid channel 7 is formed inside the filter element tube 22, and the third fluid channel 7 communicates with the third mounting groove 31; the filter element tube 22 is provided with several notches 221, and the filter element tube 22 communicates with the inner wall of the reverse osmosis membrane filter element 21 through the notches 221.

[0040] In the above structure, the reverse osmosis membrane filter element 21 is fitted around the outer periphery of the filter element tube 22, and several notches 221 are provided on the filter element tube 22. The filter element tube 22 communicates with the inner wall of the reverse osmosis membrane filter element 21 through the notches 221, so that the pure water filtered through the inner wall of the reverse osmosis membrane filter element 21 flows into the filter element tube 22 through the notches 221. By forming a third fluid channel 7 inside the filter element tube 22, and communicating with the third mounting groove 31, the pure water entering the filter element tube 22 can flow along the third fluid channel 7 to the third mounting groove 31, and finally flow out of the cavity through the third inlet / outlet 111. In addition, by placing the filter element tube 22 inside the reverse osmosis membrane filter element 21 and providing notches 221 on the filter element tube 22, the pure water seeping from the inner wall of the reverse osmosis membrane filter element 21 is guided, preventing pure water from overflowing into other parts of the cavity.

[0041] In an embodiment of this utility model, the mounting member 3 is provided with a first sleeve structure 34 extending vertically at one end facing the filter tube 22, and the first sleeve structure 34 is sleeved and fitted with the bottom of the filter tube 22; and / or, the mounting member 3 is provided with a second sleeve structure 35 extending vertically at one end facing the reverse osmosis membrane filter element 21, the second sleeve structure 35 is located outside the first sleeve structure 34, and the second sleeve structure 35 is sleeved and fitted with the bottom of the reverse osmosis membrane filter element 21.

[0042] In the above structure, by providing a first sleeve structure 34 and a second sleeve structure 35 extending vertically in the mounting component 3, the first sleeve structure 34 is sleeved with the bottom of the filter element tube 22, and the second sleeve structure 35 is sleeved with the bottom of the reverse osmosis membrane filter element 21. Since the sleeved connection method is simple and reliable, the installation and fixing efficiency is improved, thereby increasing production efficiency. Alternatively, the first sleeve structure 34 and the second sleeve structure 35 can be configured as sleeve pipes, using these sleeve pipes to achieve the sleeved connection between the mounting component 3 and the bottom of the filter element tube 22, and also to achieve the sleeved connection between the mounting component 3 and the bottom of the reverse osmosis membrane filter element 21.

[0043] To prevent pure water from overflowing when the flow rate is high, the filter tube 22 is provided with a sealing structure 222 at one end facing away from the mounting component 3. The sealing structure 222 is located above several notches 221 and is used to prevent the fluid in the third fluid channel 7 from moving vertically upward.

[0044] In the above structure, by providing a sealing structure 222 at one end of the filter tube 22 facing away from the mounting member 3, and positioning the sealing structure 222 above several notches 221, all pure water flowing into the filter tube 22 through the notches 221 is blocked below the sealing structure 222, preventing pure water from moving upward along the filter tube 22 and causing overflow, and also preventing the pure water from being contaminated by other components in the cavity. As an optional implementation, the sealing structure 222 can be configured as a baffle plate, located at the end of the filter tube 22 facing away from the mounting member 3. The baffle plate can be integrally formed with the filter tube 22, or it can be connected to the filter tube 22 by means of bonding, etc., which will not be elaborated further here.

[0045] To solve the problem of closure inside the cavity, in the embodiment of this utility model, the filter element device also includes a filter element cover 8. One of the bottom of the filter element cover 8 and the top of the housing 1 is provided with a second slot structure 81, and the other is provided with a second extension structure 13 extending toward the second slot structure 81. The second extension structure 13 is engaged with the second slot structure 81 to achieve a fit.

[0046] In the above structure, a filter element cover 8 is provided, and one of the bottom of the filter element cover 8 and the top of the housing 1 is provided with a second slot structure 81, while the other is provided with a second extension structure 13 extending toward the second slot structure 81. This allows the second extension structure 13 to engage with the second slot structure 81, thereby achieving a fit. The connection between the housing 1 and the filter element cover 8 closes the cavity, preventing water from overflowing. This snap-fit ​​mechanism between the second extension structure 13 and the second slot structure 81 is simple and convenient to operate, simplifying the installation process and improving production efficiency.

[0047] Furthermore, in order to solve the sealing problem between the filter element cover 8 and the housing 1, in the embodiment of this utility model, the bottom of the filter element cover 8 and the top of the housing 1 are spin-welded to form an integral structure.

[0048] In the above structure, the bottom of the filter element cover 8 and the top of the housing 1 are welded together by using a rotary welding machine or other rotary welding equipment to form an integral structure, thereby eliminating the gap between the filter element cover 8 and the housing 1 as much as possible, improving the sealing level of the connection between the filter element cover 8 and the housing 1, achieving a good sealing effect, and preventing water from leaking from the connection.

[0049] To prevent water leakage between the filter tube 22 and the mounting component 3, and between the water stop valve 41 and the limiting structure 1111, in this embodiment of the utility model, the bottom of the filter tube 22 is provided with a first sealing element, and the filter tube 22 is sealed to the mounting component 3 through the first sealing element; and / or, the bottom of the water stop valve 41 is provided with a second sealing element, and the bottom of the water stop valve 41 is sealed to the limiting structure 1111 through the second sealing element.

[0050] In the above structure, by providing a first sealing element at the bottom of the filter element tube 22 and allowing the filter element tube 22 to seal with the mounting part 3 through the first sealing element, the sealing performance between the filter element tube 22 and the mounting part 3 is improved, thus preventing water leakage between the filter element tube 22 and the mounting part 3; by providing a second sealing element at the bottom of the stop valve 41 and allowing the bottom of the stop valve 41 to seal with the limiting structure 1111 through the second sealing element, the sealing performance between the stop valve 41 and the limiting structure 1111 is improved, thus preventing water leakage between the stop valve 41 and the limiting structure 1111. In one optional implementation, the first and second sealing elements can be configured as sealing rings. Taking the mounting component 3 with a vertically extending first sleeve structure 34 at one end facing the filter tube 22, and the first sleeve structure 34 sleeved with the bottom of the filter tube 22 as an example, the first sleeve structure 34 and / or the filter tube 22 are provided with sealing rings. At the same time as the first sleeve structure 34 sleeves with the filter tube 22, a sealing fit is formed through the sealing ring. For the water stop valve 41, the bottom of the water stop valve 41 is provided with a sealing ring, and the limiting structure 1111 may also be provided with a sealing ring as appropriate, so that the water stop valve 41 achieves a sealing fit with the limiting structure 1111 through the sealing ring.

[0051] For illustrative purposes, the water circuit principle and water flow direction of this filter element device are explained in this embodiment. Please refer to [link / reference]. Figures 1 to 3 , specifically:

[0052] First, unfiltered external water sources such as tap water flow through the first inlet / outlet 111 and the first stop valve 41, then into the hollow structure 311 in the first mounting groove 31, and into the first fluid channel 5; wherein, the first stop valve 41 is used to allow the external water source to flow unidirectionally into the cavity.

[0053] Then, the first fluid channel 5 is connected to the second fluid channel 6. After the unfiltered water in the first fluid channel 5 flows into the second fluid channel 6, it comes to the space between the outer and inner walls of the reverse osmosis membrane filter element 21. The unfiltered water is filtered into pure water after passing through the inner wall of the reverse osmosis membrane filter element 21. The remaining wastewater flows along the second fluid channel 6 between the outer and inner walls of the reverse osmosis membrane filter element 21, and passes through the hollow structure 311 of the second mounting groove 31, the second stop valve 41 and the second inlet / outlet 111 in sequence, and is finally discharged out of the cavity. The second stop valve 41 is used to allow the wastewater to flow unidirectionally from the cavity to the outside of the cavity.

[0054] Afterwards, the filtered pure water enters the inner side of the filter element tube 22 through the notch 221 on the filter element tube 22, reaches the third fluid channel 7, and flows along the third fluid channel 7 and passes through the hollow structure 311 of the third mounting groove 31, the third stop valve 41 and the third inlet / outlet 111 in sequence, and is finally discharged out of the cavity; wherein, the third stop valve 41 is used to allow pure water to flow unidirectionally from the cavity to the outside of the cavity.

[0055] This utility model also proposes a water purification device, which includes the filter element device in the above embodiments. The specific structure of the filter element device is as described in the above embodiments. Since this water purification device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0056] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A filter cartridge device, characterized in that, include: The housing has an internal cavity; the housing has a water inlet / outlet structure, which includes three water inlets / outlets; the water inlets / outlets are equipped with limiting structures. A filter assembly, wherein the filter assembly is disposed within the cavity; The mounting component is disposed within the cavity; the mounting component is connected to one end of the filter assembly; the mounting component has three mounting slots facing the water inlet / outlet structure, and the mounting slots have a hollow structure on the side facing the filter assembly; The valve body assembly includes three stop valves, which are correspondingly disposed in the three mounting slots. The end of each stop valve away from the hollow structure abuts against the limiting structure. The stop valves are used to control the connection and interruption between the hollow structure and the inlet and outlet.

2. The filter element device as described in claim 1, characterized in that, The mounting component has an extension section extending toward the inlet and outlet, and three mounting grooves are formed in the extension section; a first slot structure is provided on one side of the mounting component with the extension section, and a first extension structure is provided on the inner wall of the housing extending toward the first slot structure, and the first extension structure is engaged with the first slot structure to achieve a fit.

3. The filter element device as described in claim 2, characterized in that, The filtration assembly includes a reverse osmosis membrane filter element, and one end of the reverse osmosis membrane filter element facing the mounting component is connected to the mounting component. The reverse osmosis membrane filter element is annular, and a first fluid channel is formed between the outer wall of the reverse osmosis membrane filter element and the cavity wall of the cavity, and the first fluid channel is connected to the first mounting groove. A second fluid channel is formed between the outer wall and the inner wall of the reverse osmosis membrane filter element. The second fluid channel is connected to the second mounting groove, and the first fluid channel is connected to the second fluid channel.

4. The filter element device as described in claim 3, characterized in that, The filtration assembly further includes a filter element tube, one end of which faces the mounting component and is connected to the mounting component; the reverse osmosis membrane filter element is sleeved on the outer periphery of the filter element tube. The filter tube forms a third fluid channel, which is connected to the third mounting groove. The filter element tube has several notches, and the filter element tube communicates with the inner wall of the reverse osmosis membrane filter element through the notches.

5. The filter element device as described in claim 4, characterized in that, The mounting component has a first sleeve structure extending vertically at one end facing the filter tube, and the first sleeve structure is sleeved and fitted with the bottom of the filter tube. And / or, the mounting component has a second sleeve structure extending vertically at one end facing the reverse osmosis membrane filter element, the second sleeve structure being located outside the first sleeve structure, and the second sleeve structure engaging with the bottom of the reverse osmosis membrane filter element.

6. The filter element device as described in claim 4 or 5, characterized in that, The filter element tube has a sealing structure at one end facing away from the mounting component. The sealing structure is located above the plurality of notches and is used to prevent the fluid in the third fluid channel from moving vertically upward.

7. The filter element device as described in claim 4, characterized in that, The filter element device also includes a filter element cover, one of the bottom of the filter element cover and the top of the housing is provided with a second slot structure, and the other is provided with a second extension structure extending toward the second slot structure, the second extension structure being engaged with the second slot structure to achieve a fit.

8. The filter element device as described in claim 7, characterized in that, The bottom of the filter element cover is spin-welded to the top of the housing to form an integral structure.

9. The filter element device as described in claim 4, characterized in that, The bottom of the filter element tube is provided with a first sealing element, and the filter element tube is sealed to the mounting component through the first sealing element; And / or, the bottom of the stop valve is provided with a second sealing element, and the bottom of the stop valve is sealed to the limiting structure through the second sealing element.

10. A water purification device, characterized in that, Includes the filter cartridge device as described in any one of claims 1 to 9.

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