Filter capable of backwashing

Abstract

The utility model discloses a filter capable of backwashing, which comprises a filter cartridge filled with filter materials, the high-grade filter materials can be cotton, and the low-grade filter materials can be gravel. A first pipeline for conveying sewage and a second pipeline for discharging clean water are arranged on the filter cartridge. A cavity is formed in the filter cartridge and located above the filter material, a filter cage is arranged in the filter material, and the second pipeline is communicated with the filter cage through a water purification pipeline. The first pipeline is directly connected with the cavity, and the filter material is cleaned in a back flushing mode. In further optimization, the water purification pipeline is a vertical straight pipe, the first pipeline is perpendicular to the water purification pipeline and right faces the water purification pipeline, and it is guaranteed that water flow is evenly distributed. The device is simple in structure, convenient to maintain, capable of effectively cleaning the filtering material through back flushing, capable of improving the filtering efficiency and prolonging the service life, and especially suitable for swimming pool water treatment scenes. According to the utility model, the withstood gravel can be selected as a filtering material.

Description

Technical Field

[0001] This invention belongs to the field of filters, and specifically relates to a filter capable of backwashing. Background Technology

[0002] With socio-economic development and improved living standards, swimming pools have become widely used for leisure and fitness. However, because swimming pool water is susceptible to the effects of human secretions, impurities, microorganisms, and other pollutants, maintaining water cleanliness is crucial for the normal operation of the pool. Therefore, the demand for pool filtration equipment is increasing daily.

[0003] Traditional pool filters typically use a unidirectional water flow filtration method, meaning they purify the water through filter media. However, these types of filters have the following problems:

[0004] Low cleaning efficiency: During long-term use, the filter material is prone to accumulating a large amount of impurities, leading to blockage. Frequent replacement or manual cleaning is required, which increases maintenance costs.

[0005] Inconvenient to operate: Traditional filters usually require stopping the machine and disassembling during cleaning, which has a certain impact on the normal use of the pool.

[0006] Unsatisfactory filtration effect: Some filters have simple filter material designs that are difficult to effectively handle fine particles or oily contaminants, making it difficult to maintain clean water quality in the long term.

[0007] To address these issues, filters with backwashing capabilities have been gradually applied to pool water treatment. However, existing backwashing filters generally suffer from complex structures, high manufacturing costs, and difficult operation. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a filter that is simple in structure, easy to use and can be backwashed, in view of the current status of the prior art. The filter can be backwashed by innovative design to improve filtration efficiency and extend filter service life.

[0009] The technical solution adopted by this invention to solve the above-mentioned technical problems is as follows: a filter capable of backwashing, comprising a filter cartridge containing filter material, a first pipe for conveying wastewater and a second pipe for discharging clean water on the filter cartridge, a cavity inside the filter cartridge located above the filter material, a filter cage inside the filter material, and a clean water pipe connected to the second pipe and the filter cage; the first pipe is directly connected to the cavity. By setting a cavity inside the filter cartridge, wastewater first enters the cavity and then passes through the filter material and filter cage for filtration, effectively avoiding direct impact of wastewater on the filter material and extending the service life of the filter material. At the same time, the cavity design allows the water flow to clean the filter material more evenly during backwashing, improving the filter's maintenance efficiency and ease of use. The specific backwashing method is as follows: clean water is forced from the second pipe into the clean water pipe, filter cage, and filter material, causing the dirt deposited on the filter material to churn and mix in the cavity before being discharged through the first pipe.

[0010] In the preferred design, the water purification pipe is a straight pipe, perpendicular to the ground. This vertical straight pipe design ensures a simple water flow path with low resistance, improving water flow efficiency and reducing energy loss. Furthermore, this design facilitates later cleaning and maintenance, resulting in a more stable and efficient water flow.

[0011] In the preferred embodiment, the first pipe is perpendicular to and directly opposite the purified water pipe. This perpendicular and directly opposite design of the first pipe helps optimize water flow distribution, making the flow paths of wastewater and purified water more efficient and without interference, further improving filtration efficiency and the effectiveness of backwashing.

[0012] In a preferred embodiment, a base is provided below the filter cartridge, the base has a mounting hole, and the filter cartridge has a column inserted into the mounting hole. The column has a limiting protrusion pressing against the lower end of the mounting hole. The mounting hole in the base and the limiting protrusion on the column enhance the installation stability of the filter cartridge, preventing displacement or loosening due to vibration or water pressure, and ensuring the long-term reliability and safety of the filter.

[0013] In the preferred embodiment, the column has a recessed hole with a closed lower end, and the filter cage has a first circular tube that rests on the recessed hole. The recessed hole on the column and its connection with the first circular tube of the filter cage ensure a stable connection between the filter cage and the column, effectively preventing the filter cage from shifting due to water flow impact or strong water flow during backwashing, thus guaranteeing the filtration performance of the filter material.

[0014] In the preferred embodiment, a height difference is provided between the bottom of the filter cage and the bottom of the filter cartridge. This height difference design increases the contact area between the filter material and the water flow, effectively improving the filtration effect. Simultaneously, during backwashing, the height difference creates a powerful water flow, further enhancing cleaning efficiency.

[0015] In the preferred embodiment, both the first and second pipes are located on the cover, and the filter cartridge has a feed port, which is covered by the cover. By placing the first and second pipes on the cover, it facilitates the overall disassembly and maintenance of the filter. The feed port design on the filter cartridge makes filling and replacing the filter media more convenient, and the cover covering the feed port effectively prevents sewage or impurities from leaking out, further improving the filter's sealing performance and ease of operation.

[0016] In a preferred embodiment, the filter cage is equipped with a second circular tube that fits around the outer circumference of the water purification pipe. The design of the second circular tube on the filter cage, in conjunction with the water purification pipe, improves the guidance of water flow, allowing purified water to flow more efficiently through the filter cage into the water purification pipe. Simultaneously, the second circular tube enhances the structural stability of the filter cage, preventing deformation or displacement due to water flow pressure.

[0017] In the preferred embodiment, the filter material is cotton, and it is arranged in layers to wrap the filter cage.

[0018] In another filter material scheme, the filter material is sand, along with pebbles laid between the sand and the first pipe; bristles are placed between the filter cage and the sand. By using sand as the filter material, smaller particulate impurities can be effectively intercepted; the pebble layer increases the uniformity of water flow distribution and prevents the sand layer from being moved or blocked by the water flow; the bristles provide additional support and auxiliary filtration function for the filter material, helping to filter oily substances while improving the overall cleanliness and durability of the filter material. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure after the filter material has been removed;

[0021] Figure 3 yes Figure 2 A schematic diagram of the decomposition process;

[0022] Figure 4 yes Figure 2 Schematic diagram of the structure of section A;

[0023] Figure 5 yes Figure 2 Schematic diagram of section B in the middle;

[0024] Figure 6 This is a schematic diagram of the structure of Embodiment 2;

[0025] Figure 7 This is a schematic diagram of the structure of Embodiment 3. Detailed Implementation

[0026] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] The attached diagrams are labeled as follows: Filter material 1, Cotton 11, Sand 12, Pebbles 13, Wool 14, Filter cylinder 2, Cavity 21, Column 22, Limiting protrusion 23, Countersunk hole 24, Feed port 25, First pipe 3, Second pipe 4, Filter cage 5, First round pipe 51, Second round pipe 52, Clean water pipe 6, Base 7, Mounting hole 71, Cover 8, Water pump 9. Example

[0028] A filter that can be backwashed, such as Figure 1 As shown, the filter includes a filter cartridge 2 containing filter material 1. The filter cartridge 2 is provided with a first pipe 3 for conveying sewage and a second pipe 4 for discharging clean water. The filter cartridge 2 has a cavity 21 inside, which is located above the filter material 1. The filter material 1 is provided with a filter cage 5. A clean water pipe 6 is provided between the second pipe 4 and the filter cage 5. The first pipe 3 is directly connected to a water pump 9.

[0029] In the embodiments, such as Figure 1 , 2 As shown in Figures 4 and 5, the water purification pipe 6 is a straight pipe and is perpendicular to the ground.

[0030] In the embodiments, such as Figure 1 , 2 As shown in Figures 6 and 7, the first pipe 3 is perpendicular to the water purification pipe 6 and is directly opposite the water purification pipe 6.

[0031] In the embodiments, such as Figure 3 , 5 As shown in Figures 6 and 7, a base 7 is provided below the filter cartridge 2. The base 7 has a mounting hole 71. The filter cartridge 2 has a column 22 inserted into the mounting hole 71. The column 22 has a limiting protrusion 23 pressing against the lower end of the mounting hole 71.

[0032] In the embodiments, such as Figure 3 , 5 As shown in Figures 6 and 7, the column 22 is provided with a recessed hole 24 with its lower end closed, and the filter cage 5 is provided with a first circular tube 51 that rests on the recessed hole 24.

[0033] In the embodiments, such as Figure 3 , 5 As shown in Figures 6 and 7, there is a height difference between the bottom of the filter cage 5 and the bottom of the filter cylinder 2.

[0034] In the embodiments, such as Figure 1 , 3 As shown in Figures 4 and 5, the first pipe 3 and the second pipe 4 are both located on the cover 8. The filter cylinder 2 is provided with a feed port 25, and the cover 8 is placed over the feed port 25.

[0035] In the embodiments, such as Figure 5As shown, the filter cage 5 is provided with a second circular tube 52 that is fitted around the outer periphery of the water purification pipe 6.

[0036] In this embodiment, filter material 1 is sand 12. Example

[0037] The difference between the structure of Example 2 and Example 1 is that the filter material 1 is cotton 11, and it is layered and wrapped around the filter cage 5, as shown in Example 2. Figure 6 As shown. Example

[0038] The structure of Embodiment 3 differs from that of Embodiment 1 in that: the filter material 1 is sand 12, and pebbles 13 are laid between the sand 12 and the first pipe 3; tufts 14 are provided between the filter cage 5 and the sand 12, such as... Figure 7 As shown.

[0039] The specific reverse flushing method in Examples 1 to 3 is as follows: clean water is forced from the second pipe 4 into the clean water pipe 6, filter cage 5, and filter material 1, causing the dirt deposited on the filter material 1 to tumble and mix in the cavity 21 and then enter the first pipe 3 for discharge.

[0040] The preferred embodiments of the present invention have been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. A back-flushable filter comprising a filter cartridge (2) containing filter material (1), the filter cartridge (2) being provided with a first conduit (3) for the supply of dirty water and a second conduit (4) for the discharge of clean water, characterized in that: The filter cartridge (2) is internally provided with a cavity (21), which is located above the filter material (1); the filter material (1) is internally provided with a filter cage (5); the second pipeline (4) and the filter cage (5) are in communication with a clean water pipeline (6); and the first pipeline (3) is directly connected to the cavity (21).

2. A back-flushable filter according to claim 1, characterised in that: The clean water pipeline (6) is a straight pipeline and is perpendicular to the ground.

3. A back-flushable filter according to claim 2, characterised in that: The first pipeline (3) is perpendicular to the clean water pipeline (6) and directly faces the clean water pipeline (6).

4. A back-flushable filter according to claim 3, characterised in that: The bottom of the filter cartridge (2) is provided with a base (7), the base (7) is provided with a placing hole (71), the filter cartridge (2) is provided with a stand column (22) inserted into the placing hole (71), and the stand column (22) is provided with a limiting protrusion (23) pressed at the lower end of the placing hole (71).

5. A back-flushable filter according to claim 4, characterised in that: The stand column (22) is provided with a counterbore (24) with a closed lower end, and the filter cage (5) is provided with a first circular tube (51) abutting on the counterbore (24).

6. A back-flushable filter according to claim 5, characterised in that: The filter cage (5) and the bottom of the filter cartridge (2) are provided with a height difference.

7. A back-flushable filter according to claim 6, characterised in that: The first pipeline (3) and the second pipeline (4) are located on the cover (8), the filter cartridge (2) is provided with a feeding port (25), and the cover (8) is arranged on the feeding port (25).

8. A back-flushable filter according to claim 7, characterised in that: The filter cage (5) is provided with a second circular tube (52) sleeved on the outer periphery of the clean water pipeline (6).

9. A back-flushable filter according to any one of claims 1 to 8, characterised in that: The filter material (1) is cotton (11) and is layered to wrap the filter cage (5).

10. A back-flushable filter according to any one of claims 1 to 8, characterised in that: The filter material (1) is sand (12), and pebbles (13) are laid between the sand (12) and the first pipeline (3); and brown hair (14) is arranged between the filter cage (5) and the sand (12).

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