Composite long-acting filter element

Abstract

The utility model discloses a composite long-acting filter element, which belongs to the technical field of water purification and comprises a filter element shell and a filter element cover plate, one end of the filter element shell is closed, the other end of the filter element shell is provided with a shell opening, the filter element cover plate is fixed on the shell opening, and a filter cavity is formed between the filter element cover plate and the filter element shell. Front activated carbon, an ultrafiltration membrane, rear activated carbon, a first check valve and a second check valve are arranged in the filter cavity, a raw water inlet, a front carbon water outlet, a rear carbon water inlet, a rear carbon water outlet and a drain outlet are formed in the filter element cover plate, the first check valve is located between the front activated carbon and the front carbon water outlet, and the second check valve is located between the front carbon water outlet and the ultrafiltration membrane. According to the structure, the service life of the front-mounted activated carbon can be prolonged, the front-mounted activated carbon can be subjected to backwashing, so that the filter element can be used for a long time under the condition that the filter element is not replaced, the combined space occupancy rate of the front-mounted activated carbon, the ultrafiltration membrane and the rear-mounted activated carbon is low, in addition, the investment of packaging shell cost can be reduced, the production cost is saved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, specifically a composite long-lasting filter element. Background Technology

[0002] RO reverse osmosis water purifiers are widely used in the market, but a persistent pain point is the need for regular filter replacement. The main reasons are: 1. The first-stage filter becomes saturated with coarse particles and fails; 2. The first-stage filter's filtration precision is insufficient (approximately 5-micron pores). The second-stage filter, in addition to adsorbing residual chlorine and pigments, also adsorbs particles smaller than 5 microns that the first-stage filter cannot block, leading to premature saturation and a short lifespan. Therefore, users must replace the filters regularly. However, this replacement leads to: 1. Significant waste of filter media resources; 2. Users not only need to constantly monitor the lifespan of their water purifier's filters but also have to purchase replacement filters from different manufacturers, causing inconvenience. Furthermore, the fourth-stage filter, used to improve taste, is usually installed separately. However, installing a single filter not only takes up space in the water purifier, increasing its overall size, but also wastes the casing, resulting in higher production costs.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The present invention aims to provide a composite long-lasting filter element to overcome the shortcomings of the prior art.

[0005] A composite long-lasting filter element designed for this purpose includes a filter element shell and a filter element cover plate. One end of the filter element shell is closed, and the other end is provided with an opening. The filter element cover plate is fixed on the opening and forms a filtration chamber with the filter element shell. The filtration chamber is provided with pre-activated carbon, an ultrafiltration membrane, post-activated carbon, a first check valve, and a second check valve. The filter element cover plate is provided with a raw water inlet, a pre-activated carbon outlet, a post-activated carbon inlet, a post-activated carbon outlet, and a drain outlet. The first check valve is located between the pre-activated carbon and the pre-activated carbon outlet, and the second check valve is located between the pre-activated carbon outlet and the ultrafiltration membrane.

[0006] The filter chamber is provided with a front carbon frame, which is positioned at the closed end of the filter element shell and has a front carbon assembly groove facing the opening of the shell. The pre-activated carbon is placed on the front carbon assembly groove.

[0007] A filter membrane holder is provided inside the filtration chamber. The filter membrane holder is positioned on the front carbon frame and has a filter membrane assembly part facing the opening of the outer shell. The ultrafiltration membrane is disposed on the filter membrane assembly part.

[0008] The filter chamber is provided with a post-carbon frame, and a filter membrane cover is provided between the filter membrane frame and the post-carbon frame. The filter membrane cover surrounds the ultrafiltration membrane, and a number of filter membrane cover water passage holes are provided at intervals around its periphery. The post-carbon frame is provided with a post-carbon assembly groove facing the opening of the outer shell, and the post-activated carbon is placed on the post-carbon assembly groove.

[0009] A positioning frame is provided between the pre-activated carbon frame and the filter membrane frame. The pre-activated carbon is positioned between the positioning frame and the pre-activated carbon frame on one side, and the filter membrane frame is positioned on the other side of the positioning frame.

[0010] The positioning frame has a positioning frame assembly port at its center, and the filter membrane frame has a filter membrane frame assembly port at its center. The positioning frame assembly port and the filter membrane frame assembly port are linearly corresponding and sealed between them by a three-way connector. The first check valve is located on the positioning frame assembly port and is connected to the first end interface of the three-way connector. The second end interface of the three-way connector is connected to the pre-carbon water outlet. The second check valve is located on the side interface of the three-way connector.

[0011] A water distribution component is provided between the rear activated carbon frame and the filter element cover plate. A rear activated carbon frame positioning column is provided at the center of the rear activated carbon assembly tank. The post-activated carbon is sleeved on the rear activated carbon frame positioning column and positioned between the rear activated carbon frame and the water distribution component.

[0012] The water distribution component is equipped with a front carbon water outlet, a rear carbon water inlet, a rear carbon water outlet, and a sewage discharge outlet.

[0013] The pre-activated carbon water outlet is connected to the pre-activated carbon water outlet, the post-activated carbon water inlet is connected to the post-activated carbon water inlet, the post-activated carbon water outlet is connected to the post-activated carbon and the post-activated carbon water outlet, and the wastewater discharge outlet is connected to the ultrafiltration membrane and the wastewater discharge outlet.

[0014] A connecting pipe is inserted into the second end of the three-way connector. The connecting pipe passes through the filter membrane frame assembly port, the ultrafiltration membrane, and the rear carbon frame positioning column in sequence, and is then inserted into the front carbon water outlet.

[0015] The positioning frame is provided with several positioning frame water passage holes at intervals around its perimeter.

[0016] By improving the above-mentioned structure, this utility model has the following advantages compared with the prior art:

[0017] 1. The use of ultrafiltration membranes to replace existing PP cotton or PP nonwoven fabric materials for filtration improves the filtration accuracy from 5 microns to 0.1 microns, thereby blocking or intercepting substances larger than 0.1 microns and effectively extending the service life of the pre-activated carbon.

[0018] 2. By utilizing the one-way guiding function of the first check valve and the second check valve, water can flow forward on the ultrafiltration membrane and complete water filtration. At the same time, it can also flow backward on the ultrafiltration membrane and backwash away and discharge substances that are blocked or intercepted on the ultrafiltration membrane. This allows the ultrafiltration membrane to maintain a high-efficiency filtration effect for a long time, so that the filter element can be used for a long time without replacement.

[0019] 3. By combining the pre-activated carbon, ultrafiltration membrane, and post-activated carbon in the filtration chamber formed between the filter cartridge shell and the filter cartridge cover, the space occupancy rate can be effectively reduced, thereby saving space. In addition, it can also reduce the investment in the packaging shell, save production costs, and improve production efficiency. Attached Figure Description

[0020] Figure 1 This is an exploded structural diagram of an embodiment of the present invention.

[0021] Figure 2 This is an exploded structural diagram from another perspective of an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the assembly structure of an embodiment of the present utility model.

[0023] Figure 4 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the present utility model.

[0025] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along line AA.

[0026] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure along line BB. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] See Figures 1-7 This composite long-lasting filter element includes a filter element shell 1 and a filter element cover plate 2. One end of the filter element shell 1 is closed, and the other end is provided with a shell opening 1.1. The filter element cover plate 2 is fixed on the shell opening 1.1 and forms a filtration chamber with the filter element shell 1. The filtration chamber is provided with pre-activated carbon 3, ultrafiltration membrane 4, post-activated carbon 5, a first check valve 6, and a second check valve 7. The filter element cover plate 2 is provided with a raw water inlet 2.1, a pre-activated carbon outlet 2.2, a post-activated carbon inlet 2.3, a post-activated carbon outlet 2.4, and a drain outlet 2.5. The first check valve 6 is located between the pre-activated carbon 3 and the pre-activated carbon outlet 2.2, and the second check valve 7 is located between the pre-activated carbon outlet 2.2 and the ultrafiltration membrane 4.

[0030] In this embodiment, an ultrafiltration membrane 4 is used to replace the existing PP cotton or PP nonwoven fabric material for filtration. The filtration accuracy is improved from the original 5 micrometers to 0.1 micrometers, thereby blocking or intercepting substances larger than 0.1 micrometers and effectively extending the service life of the pre-activated carbon 3.

[0031] Furthermore, by utilizing the one-way guiding function of the first check valve 6 and the second check valve 7, water can flow forward on the ultrafiltration membrane 4 and complete water filtration. At the same time, it can also flow backward on the ultrafiltration membrane 4 and backwash away and discharge substances blocked or intercepted on the ultrafiltration membrane 4. This allows the ultrafiltration membrane 4 to maintain a high-efficiency filtration effect for a long time, so that the filter element can be used for a long time without replacement.

[0032] Meanwhile, combining the pre-activated carbon 3, ultrafiltration membrane 4, and post-activated carbon 5 in the filtration chamber formed between the filter cartridge shell 1 and the filter cartridge cover plate 2 can effectively reduce the space occupancy rate, thereby saving space. In addition, it can also reduce the investment in the packaging shell cost, save production costs, and improve production efficiency.

[0033] A front activated carbon frame 8 is provided inside the filter chamber. The front activated carbon frame 8 is positioned at the closed end of the filter element shell 1 and is provided with a front activated carbon assembly groove 8.1 facing the shell opening 1.1. The pre-activated carbon 3 is placed on the front activated carbon assembly groove 8.1, thereby realizing the assembly of the pre-activated carbon 3.

[0034] In this embodiment, the pre-activated carbon 3 is a second-stage filter, which is equipped with carbon fiber or granular carbon and can be used to remove chlorine, pigments and other substances from the raw water.

[0035] A filter membrane holder 9 is provided inside the filtration chamber. The filter membrane holder 9 is positioned on the front carbon holder 8 and has a filter membrane assembly part in the direction of the outer shell opening 1.1. The ultrafiltration membrane 4 is placed on the filter membrane assembly part, thereby realizing the assembly of the ultrafiltration membrane 4.

[0036] In this embodiment, the ultrafiltration membrane 4 is the first stage of filtration, which blocks or adsorbs coarse particulate matter in the raw water.

[0037] A post-activated carbon frame 10 is provided inside the filtration chamber. A filter membrane cover 11 is provided between the filter membrane frame 9 and the post-activated carbon frame 10. The filter membrane cover 11 surrounds the ultrafiltration membrane 4 and has several filter membrane cover water passage holes 11.1 spaced apart around its periphery. The post-activated carbon frame 10 is provided with a post-activated carbon assembly groove 10.1 facing the outer shell opening 1.1. The post-activated carbon 5 is placed on the post-activated carbon assembly groove 10.1, thereby realizing the assembly of the post-activated carbon 5.

[0038] In this embodiment, the post-activated carbon 5 is the third stage of filtration, and it is provided with carbon fiber or granular carbon, which can be used to improve the taste of raw water. In addition, the ultrafiltration membrane 4 is surrounded by the filter membrane cover 11 to protect the ultrafiltration membrane 4.

[0039] A positioning frame 12 is provided between the front activated carbon frame 8 and the filter membrane frame 9. The front activated carbon 3 is positioned between the positioning frame 12 and the front activated carbon frame 8 on one side, and the filter membrane frame 9 is positioned on the other side of the positioning frame 12, thereby improving the assembly stability of the front activated carbon 3 and the filter membrane frame 9.

[0040] The positioning frame 12 is provided with several positioning frame water passage holes 12.2 at intervals on its periphery, so that water can enter the pre-activated carbon 3 from the ultrafiltration membrane 4 through the several positioning frame water passage holes 12.2.

[0041] The positioning frame 12 has a positioning frame assembly port 12.1 at its center, and the filter membrane frame 9 has a filter membrane frame assembly port 9.1 at its center. The positioning frame assembly port 12.1 and the filter membrane frame assembly port 9.1 are linearly corresponding and sealed between them by a three-way connector 13. The first check valve 6 is located on the positioning frame assembly port 12.1 and is connected to the first end interface of the three-way connector 13. The second end interface of the three-way connector 13 is connected to the pre-carbon water outlet 2.2. The second check valve 7 is located on the side interface of the three-way connector 13.

[0042] In this embodiment, the first end interface and the second end interface of the three-way connector 13 are linearly arranged and are sealed and connected to the positioning frame assembly port 12.1 and the filter membrane frame assembly port 9.1 respectively. The side interface of the three-way connector 13 faces the outside of the filter element housing 1. The first check valve 6 is set on the positioning frame assembly port 12.1 and its water conduction direction is towards the three-way connector 13. The second check valve 7 is set on the side interface of the three-way connector 13 and its water conduction direction is towards the ultrafiltration membrane 4.

[0043] A water distribution component 14 is provided between the rear carbon frame 10 and the filter element cover plate 2. A rear carbon frame positioning column 10.2 is provided at the center of the rear carbon assembly groove 10.1. The rear activated carbon 5 is sleeved on the rear carbon frame positioning column 10.2 and positioned between the rear carbon frame 10 and the water distribution component 14, thereby improving the assembly stability of the rear activated carbon 5.

[0044] The water distribution component 14 is equipped with a front carbon outlet 14.2, a rear carbon inlet 14.3, a rear carbon outlet 14.4, and a sewage outlet 14.5.

[0045] Among them, the pre-carbon water outlet 14.2 is connected to the pre-carbon water outlet 2.2, the post-carbon water inlet 14.3 is connected to the post-carbon water inlet 2.3, the post-carbon water outlet 14.4 is connected to the post-activated carbon 5 and the post-carbon water outlet 2.4, and the sewage outlet 14.5 is connected to the ultrafiltration membrane 4 and the sewage outlet 2.5.

[0046] In this embodiment, a front carbon water outlet 14.2, a rear carbon water inlet 14.3, a rear carbon water outlet 14.4, and a sewage outlet 14.5 are provided at different positions on the water distribution component 14. The above multiple outlets are used to divert water, so as to achieve the filtration of raw water and the backwashing of the ultrafiltration membrane 4.

[0047] A connecting pipe 15 is inserted into the second end interface of the three-way connector 13. The connecting pipe 15 passes through the filter membrane frame assembly port 9.1, the ultrafiltration membrane 4, and the rear carbon frame positioning post 10.2 in sequence, and is then inserted into the front carbon water outlet port 14.2.

[0048] In this embodiment, one end of the connecting pipe 15 is sealed and inserted into the second end interface of the tee connector 13, and the other end is sealed and inserted into the front carbon water outlet 14.2.

[0049] The filter element in this embodiment has three flow channels.

[0050] The first water flow path is as follows: raw water enters the filtration chamber through the raw water inlet 2.1, and passes through several filter membrane cover water passage holes 11.1 around the water distribution component 14, the rear activated carbon frame 10, and the filter membrane cover 11. It then enters the ultrafiltration membrane 4 and completes the first stage of filtration. The water after the first stage of filtration then enters the pre-activated carbon 3 through several positioning frame water passage holes 12.2 and completes the second stage of filtration. The water after the second stage of filtration then flows out of the filtration chamber through the first check valve 6, the three-way connector 13, the connecting pipe 15, the pre-activated carbon outlet 14.2, and the pre-activated carbon outlet 2.2. At this time, the user can connect the pre-activated carbon outlet 2.2 to the secondary filtration water interface so that the user can use the water flowing out of the pre-activated carbon outlet 2.2.

[0051] In addition, users can connect the front carbon outlet 2.2 with the rear carbon outlet 2.4 to form a second water flow path. The water flowing out of the front carbon outlet 2.2 enters the filter chamber again through the rear carbon outlet 2.4 and passes through the post-activated carbon 5 to complete the third stage of filtration. The water after the third stage of filtration flows out of the filter chamber through the rear carbon outlet 14.4 and the rear carbon outlet 2.4 in sequence. At this time, users can connect the rear carbon outlet 2.4 to the three-stage filtration water interface so that users can use the water flowing out of the rear carbon outlet 2.4.

[0052] The third flow path is the backwash path for the ultrafiltration membrane 4. It consists of water passing sequentially through the pre-carbon outlet 2.2, the pre-carbon outlet 14.2, the connecting pipe 15, the three-way connector 13, and the second check valve 7, acting on the surface of the ultrafiltration membrane 4 and backwashing the substances blocked or intercepted on the ultrafiltration membrane 4. The backwashed water flows out of the filter chamber through the drain outlet 14.5 and the drain outlet 2.5.

[0053] The directions of the above three waterways are as follows: Figure 6 , Figure 7 The arrows indicate multiple line segments.

[0054] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A composite long-life filter element, comprising a filter element housing (1) and a filter element cover plate (2), characterized in that: The filter cartridge housing (1) is closed at one end and has an opening (1.1) at the other end. The filter cartridge cover plate (2) is fixed on the opening (1.1) and forms a filtration chamber with the filter cartridge housing (1). The filtration chamber is provided with pre-activated carbon (3), ultrafiltration membrane (4), post-activated carbon (5), first check valve (6), and second check valve (7). The filter cartridge cover plate (2) is provided with raw water inlet (2.1), pre-activated carbon outlet (2.2), post-activated carbon inlet (2.3), post-activated carbon outlet (2.4), and sewage outlet (2.5). The first check valve (6) is located between the pre-activated carbon (3) and the pre-activated carbon outlet (2.2), and the second check valve (7) is located between the pre-activated carbon outlet (2.2) and the ultrafiltration membrane (4).

2. The composite long-life filter element according to claim 1, characterized in that: The filter chamber is provided with a front carbon frame (8), which is positioned at the closed end of the filter element shell (1) and has a front carbon assembly groove (8.1) facing the opening (1.1) of the shell. The pre-activated carbon (3) is placed on the front carbon assembly groove (8.1).

3. The composite long-life filter element according to claim 2, characterized in that: A filter membrane holder (9) is provided inside the filter chamber. The filter membrane holder (9) is positioned on the front carbon frame (8) and has a filter membrane assembly part in the direction of the outer shell opening (1.1). The ultrafiltration membrane (4) is disposed on the filter membrane assembly part.

4. The composite long-life filter element according to claim 3, characterized in that: The filter chamber is provided with a post-carbon frame (10), and a filter membrane cover (11) is provided between the filter membrane frame (9) and the post-carbon frame (10). The filter membrane cover (11) surrounds the ultrafiltration membrane (4) and has a number of filter membrane cover water passage holes (11.1) spaced around its periphery. The post-carbon frame (10) is provided with a post-carbon assembly groove (10.1) facing the opening (1.1) of the outer shell, and the post-activated carbon (5) is placed on the post-carbon assembly groove (10.1).

5. The composite long-life filter element according to claim 4, characterized in that: A positioning frame (12) is provided between the front activated carbon frame (8) and the filter membrane frame (9). The pre-activated carbon (3) is positioned between the positioning frame (12) and the front activated carbon frame (8) on one side, and the filter membrane frame (9) is positioned on the other side of the positioning frame (12).

6. The composite long-life filter element according to claim 5, characterized in that: The positioning frame (12) has a positioning frame assembly port (12.1) at its center, and the filter membrane frame (9) has a filter membrane frame assembly port (9.1) at its center. The positioning frame assembly port (12.1) and the filter membrane frame assembly port (9.1) are linearly corresponding and are sealed together by a three-way connector (13). The first check valve (6) is located on the positioning frame assembly port (12.1) and is connected to the first end interface of the three-way connector (13). The second end interface of the three-way connector (13) is connected to the pre-carbon water outlet (2.2). The second check valve (7) is located on the side interface of the three-way connector (13).

7. The composite long-life filter element according to claim 6, characterized in that: A water distribution component (14) is provided between the rear carbon frame (10) and the filter element cover plate (2). A rear carbon frame positioning column (10.2) is provided at the center of the rear carbon assembly tank (10.1). The post-activated carbon (5) is sleeved on the rear carbon frame positioning column (10.2) and positioned between the rear carbon frame (10) and the water distribution component (14).

8. The composite long-life filter element according to claim 7, characterized in that: The water distribution component (14) is provided with a front carbon outlet (14.2), a rear carbon inlet (14.3), a rear carbon outlet (14.4), and a sewage outlet (14.5). The pre-carbon water outlet (14.2) is connected to the pre-carbon water outlet (2.2), the post-carbon water inlet (14.3) is connected to the post-carbon water inlet (2.3), the post-carbon water outlet (14.4) is connected to the post-activated carbon (5) and the post-carbon water outlet (2.4), and the sewage outlet (14.5) is connected to the ultrafiltration membrane (4) and the sewage outlet (2.5).

9. The composite long-life filter element according to claim 8, characterized in that: A connecting pipe (15) is inserted into the second end interface of the three-way connector (13). The connecting pipe (15) passes through the filter membrane frame assembly port (9.1), the ultrafiltration membrane (4), and the rear carbon frame positioning column (10.2) in sequence, and is then inserted into the front carbon water outlet (14.2).

10. The composite long-life filter element according to claim 6, characterized in that: The positioning frame (12) is provided with several positioning frame water passage holes (12.2) at intervals around its perimeter.

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