Simplified backwashing structure of filter element of water purifier

Abstract

The utility model discloses a simplified backwashing structure of a filter element of a water purifier, which belongs to the technical field of water purifiers and comprises a raw water inlet pipe, a UF filter element and an RO filter element, a first electromagnetic valve is communicated between the raw water inlet pipe and the UF filter element, a second electromagnetic valve is communicated between the UF filter element and the RO filter element, a fourth electromagnetic valve is communicated between the UF filter element and the second electromagnetic valve, and the RO filter element is communicated with the fourth electromagnetic valve. The fourth electromagnetic valve is communicated with a raw water inlet pipe, and a backwashing water outlet of the UF filter element is communicated with a fifth electromagnetic valve and is communicated with a wastewater discharge pipe through the fifth electromagnetic valve. According to the structure, the UF filter element can be backwashed under the condition that normal raw water filtration can be realized, washing water of the UF filter element can be directly discharged, and secondary pollution to other filter elements or pipelines in the water purifier is avoided, so that the filtering effect of the water purifier is ensured, and raw water of the raw water inlet pipe can be used for directly backwashing the UF filter element, so that the service life of the UF filter element is prolonged. Therefore, the flushing effect of the UF filter element can be improved, it is ensured that the UF filter element cannot be blocked, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of water purifier technology, specifically a simplified backwashing structure for a water purifier filter element. Background Technology

[0002] Existing tap water filtration devices (such as water purifiers) mainly filter impurities in water through filter cartridges. After a period of use, the filter cartridges will become clogged due to the accumulation of impurities, thus affecting the purification effect. Therefore, the filter cartridges need to be flushed.

[0003] For example, the utility model patent with Chinese patent number CN201820680058.9 discloses an automatic backwashing water treatment device for a water purifier. It includes a pre-filter, the inlet of which is connected to the raw water inlet, and the outlet of which is connected to the inlet of an ultrafiltration filter, with a low-pressure switch between them. The outlet of the ultrafiltration filter is connected to the inlet of an RO membrane filter, with a motor between them. The ultrafiltration filter is also equipped with a flushing solenoid valve. The purified water outlet of the RO membrane filter is connected to the inlet of a post-carbon filter, with a high-pressure switch between them. The wastewater outlet of the RO membrane filter is connected to the inlet of the ultrafiltration filter, and the outlet of the post-carbon filter is connected to the inlet of a water tank. The aforementioned water purifier uses wastewater recovered from the RO membrane filter to rinse the ultrafiltration membrane of the ultrafiltration filter. However, the wastewater contains a large number of impurities, resulting in poor rinsing of the ultrafiltration membrane. This not only prevents the ultrafiltration membrane from being effectively rinsed but also causes more impurities to accumulate on it. Furthermore, the rinse water still needs to pass through the RO membrane filter before being discharged, causing secondary pollution to the RO membrane filter and affecting the filtration effect of the water purifier. Therefore, further improvements are necessary. Utility Model Content

[0004] The present invention aims to provide a simplified backwashing structure for a water purifier filter cartridge to overcome the shortcomings of the prior art.

[0005] A simplified backwashing structure for a water purifier filter element designed for this purpose includes a raw water inlet pipe, a UF filter element, and an RO filter element. A first solenoid valve is connected between the raw water inlet pipe and the UF filter element. A second solenoid valve is connected between the UF filter element and the RO filter element. A fourth solenoid valve is connected between the UF filter element and the second solenoid valve. The fourth solenoid valve is connected to the raw water inlet pipe. A fifth solenoid valve is connected to the backwash drain port of the UF filter element, and a wastewater discharge pipe is connected through the fifth solenoid valve.

[0006] The raw water inlet pipe is connected to a first three-way valve, which is connected to the raw water inlet pipe, the first solenoid valve, and the fourth solenoid valve.

[0007] A second three-way valve is provided between the UF filter element and the second solenoid valve. The second three-way valve is connected to the water outlet of the UF filter element, the second solenoid valve, and the fourth solenoid valve.

[0008] The RO filter element's flushing drain outlet is connected to a third solenoid valve, and is also connected to the wastewater discharge pipe through the third solenoid valve.

[0009] The fifth solenoid valve is connected to a third three-way valve, which is connected to the third solenoid valve, the fifth solenoid valve, and the wastewater discharge pipe.

[0010] A booster pump is connected between the second solenoid valve and the RO filter element.

[0011] A carbon fiber filter element is connected between the second solenoid valve and the booster pump.

[0012] The RO filter cartridge's water outlet is connected to an RO water outlet pipe.

[0013] This invention, through structural improvements, incorporates a first solenoid valve, a second solenoid valve, and a fifth solenoid valve connected to the inlet, outlet, and backwash outlet of the UF filter element, respectively. A fourth solenoid valve, connected to the raw water inlet pipe, is located between the UF filter element and the second solenoid valve. This allows raw water from the inlet pipe to enter the UF filter element through the first solenoid valve, be filtered, and then enter the RO filter element through the second solenoid valve, thus completing normal raw water filtration. Additionally, raw water from the inlet pipe can enter the UF filter element through the fourth solenoid valve for backwashing. After washing, the water is directly discharged to the wastewater discharge pipe through the fifth solenoid valve. While ensuring that the water purifier can complete normal water filtration through the UF filter and RO filter, it can backwash the UF filter and the flushing water of the UF filter can be discharged directly without causing secondary pollution to other filter or pipe inside the water purifier. This ensures the filtration effect of the water purifier. Moreover, since the raw water in the raw water inlet pipe can directly backwash the UF filter, it can improve the flushing effect of the UF filter and ensure that the UF filter will not clog. It is highly practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of normal water filtration according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of RO filter element flushing according to an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the rinsing process of a UF filter element according to an embodiment of the present invention. Detailed Implementation

[0018] 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.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] See Figures 1-4 The simplified backwashing structure of this water purifier includes a raw water inlet pipe 1, a UF filter element 100, and an RO filter element 200. A first solenoid valve A1 connects the raw water inlet pipe 1 and the UF filter element 100. A second solenoid valve A2 connects the UF filter element 100 and the RO filter element 200. A fourth solenoid valve A4 connects the UF filter element 100 and the second solenoid valve A2. The fourth solenoid valve A4 is connected to the raw water inlet pipe 1. A fifth solenoid valve A5 is connected to the backwash drain port of the UF filter element 100, and a wastewater discharge pipe 2 is connected through the fifth solenoid valve A5.

[0021] In this embodiment, a first solenoid valve A1, a second solenoid valve A2, and a fifth solenoid valve A5 are connected to the inlet, outlet, and backwash outlet of the UF filter element 100, respectively. A fourth solenoid valve A4, which is connected to the raw water inlet pipe 1, is provided between the UF filter element 100 and the second solenoid valve A2. This allows the raw water from the raw water inlet pipe 1 to enter the UF filter element 100 through the first solenoid valve A1, be filtered, and then enter the RO filter element 200 through the second solenoid valve A2, thus completing normal raw water filtration. Additionally, the raw water from the raw water inlet pipe 1 can enter the UF filter element 100 through the fourth solenoid valve A4 for backwashing. Then, it is directly discharged to the wastewater discharge pipe 2 through the fifth solenoid valve A5. While ensuring that the water purifier can complete normal water filtration through the UF filter element 100 and RO filter element 200, it can backwash the UF filter element 100, and the flushing water of the UF filter element 100 can be discharged directly without causing secondary pollution to other filter elements or pipes inside the water purifier, thus ensuring the filtration effect of the water purifier. Moreover, since the raw water in the raw water inlet pipe 1 can directly backwash the UF filter element 100, it can improve the flushing effect of the UF filter element 100 and ensure that the UF filter element 100 will not be clogged, making it highly practical.

[0022] The raw water inlet pipe 1 is connected to a first three-way valve 10, which is connected to the raw water inlet pipe 1, the first solenoid valve A1, and the fourth solenoid valve A4.

[0023] In this embodiment, one port of the first three-way valve 10 is connected to the raw water inlet pipe 1, the second port of the first three-way valve 10 is connected to the first solenoid valve A1, and the third port of the first three-way valve 10 is connected to the fourth solenoid valve A4.

[0024] A second three-way valve 20 is provided between the UF filter element 100 and the second solenoid valve A2. The second three-way valve 20 is connected to the water outlet of the UF filter element 100, the second solenoid valve A2, and the fourth solenoid valve A4, respectively.

[0025] In this embodiment, one port of the second three-way valve 20 is connected to the water outlet of the UF filter element 100, two ports of the second three-way valve 20 are connected to the second solenoid valve A2, and three ports of the second three-way valve 20 are connected to the fourth solenoid valve A4.

[0026] In this embodiment, the first three-way valve 10 and the second three-way valve 20 are connected to a UF filter element backwashing branch pipe, and the fourth solenoid valve A4 is installed on the UF filter element backwashing branch pipe.

[0027] The flushing drain of the RO filter element 200 is connected to a third solenoid valve A3, and is also connected to the wastewater discharge pipe 2 through the third solenoid valve A3.

[0028] The fifth solenoid valve A5 is connected to the third three-way valve 30, which is connected to the third solenoid valve A3, the fifth solenoid valve A5, and the wastewater discharge pipe 2.

[0029] In this embodiment, one port of the third three-way valve 30 is connected to the third solenoid valve A3, the second port of the third three-way valve 30 is connected to the fifth solenoid valve A5, and the third port of the third three-way valve 30 is connected to the wastewater discharge pipe 2.

[0030] A booster pump 300 is connected between the second solenoid valve A2 and the RO filter element 200.

[0031] A carbon fiber filter element 400 is connected between the second solenoid valve A2 and the booster pump 300.

[0032] In this embodiment, the carbon fiber filter element 400 and the booster pump 300 are sequentially connected between the second solenoid valve A2 and the RO filter element 200. The carbon fiber filter element 400 is configured to further filter the UF water filtered by the UF filter element 100, and the booster pump 300 is configured to increase the water pressure, ensuring that water can stably enter the RO filter element 200.

[0033] The RO filter cartridge 200 has an RO water outlet connected to the RO water outlet pipe 3.

[0034] like Figure 2As shown, normal water filtration is as follows: the third solenoid valve A3, the fourth solenoid valve A4, and the fifth solenoid valve A5 are closed, while the first solenoid valve A1 and the second solenoid valve A2 are open; the raw water from the raw water inlet pipe 1 flows sequentially through the first three-way valve 10, the first solenoid valve A1, the UF filter element 100, the second three-way valve 20, the second solenoid valve A2, the carbon fiber filter element 400, the booster pump 300, and the RO filter element 200, and finally flows out from the RO water outlet pipe 3 for user use.

[0035] like Figure 3 As shown, the RO filter element 200 is cleaned as follows: the fourth solenoid valve A4, the fifth solenoid valve A5, and the RO water outlet pipe 3 are closed, while the first solenoid valve A1, the second solenoid valve A2, and the third solenoid valve A3 are opened; the raw water from the raw water inlet pipe 1 flows sequentially through the first three-way valve 10, the first solenoid valve A1, the UF filter element 100, the second three-way valve 20, the second solenoid valve A2, the carbon fiber filter element 400, the booster pump 300, the RO filter element 200, and the third solenoid valve A3, and is finally discharged from the wastewater discharge pipe 2.

[0036] like Figure 4 As shown, the cleaning procedure for UF filter element 100 is as follows: first solenoid valve A1, second solenoid valve A2, third solenoid valve A3, and RO water outlet pipe 3 are closed; fourth solenoid valve A4 and fifth solenoid valve A5 are opened.

[0037] The raw water in the raw water inlet pipe 1 flows sequentially through the first three-way valve 10, the fourth solenoid valve A4, the second three-way valve 20, the UF filter element 100, the fifth solenoid valve A5, and the third three-way valve 30, and is finally discharged from the wastewater discharge pipe 2.

[0038] 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 simplified backwashing structure for a water purifier filter cartridge, comprising a raw water inlet pipe (1), a UF filter cartridge (100), and an RO filter cartridge (200), characterized in that: A first solenoid valve (A1) is connected between the raw water inlet pipe (1) and the UF filter element (100). A second solenoid valve (A2) is connected between the UF filter element (100) and the RO filter element (200). A fourth solenoid valve (A4) is connected between the UF filter element (100) and the second solenoid valve (A2). The fourth solenoid valve (A4) is connected to the raw water inlet pipe (1). A fifth solenoid valve (A5) is connected to the backwash drain port of the UF filter element (100), and a wastewater discharge pipe (2) is connected through the fifth solenoid valve (A5).

2. The simplified backwashing structure of the filter cartridge of the water purifier according to claim 1, characterized in that: The raw water inlet pipe (1) is connected to a first three-way valve (10), which is connected to the raw water inlet pipe (1), the first solenoid valve (A1), and the fourth solenoid valve (A4).

3. The simplified backwash structure of the filter cartridge of the water purifier according to claim 2, characterized in that: A second three-way valve (20) is provided between the UF filter element (100) and the second solenoid valve (A2). The second three-way valve (20) is connected to the water outlet of the UF filter element (100), the second solenoid valve (A2), and the fourth solenoid valve (A4), respectively.

4. The simplified backwash structure of the filter cartridge of the water purifier according to claim 3, characterized in that: The flushing drain of the RO filter element (200) is connected to a third solenoid valve (A3), and is connected to the wastewater discharge pipe (2) through the third solenoid valve (A3).

5. The simplified backwash structure of the filter cartridge of the water purifier according to claim 4, characterized in that: The fifth solenoid valve (A5) is connected to a third three-way valve (30), which is connected to the third solenoid valve (A3), the fifth solenoid valve (A5), and the wastewater discharge pipe (2).

6. The simplified backwash structure of the filter cartridge of the water purifier according to claim 1, wherein: A booster pump (300) is connected between the second solenoid valve (A2) and the RO filter element (200).

7. The simplified backwash structure of the filter cartridge of the water purifier according to claim 6, characterized in that: A carbon fiber filter element (400) is connected between the second solenoid valve (A2) and the booster pump (300).

8. The simplified backwash structure of the filter cartridge of the water purifier according to claim 1, wherein: The RO filter element (200) has an RO water outlet pipe (3) connected to its water outlet.

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