Filter element back flushing structure and water purification equipment
By introducing a reverse flushing structure into the filter element, the filter module is reverse flushed by using the exhaust effect of the airbag assembly, which solves the problem of easily blocked filter element filter mesh, extends the service life of the filter element and maintains the filter effect.
Patent Information
- Application Number
- CN202420734880.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-10
AI Technical Summary
The filter mesh of the existing filter element is easily clogged by impurities, resulting in a short service life of the filter element.
The filter element reverse flushing structure is adopted to achieve airbag exhaust through the airbag assembly using the internal water accumulation, and the airbag exhaust is used to achieve reverse flushing of the filter module to remove impurities on the filter module.
It extends the service life of the filter element, maintains the original filtration effect and flux, and reduces the frequency of filter element replacement.
Smart Images
Figure CN222593509U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of water treatment, and more specifically relates to a filter element reverse flushing structure and water purification equipment. Background Art
[0002] The core components of water purification equipment include filter elements, which can isolate impurities in raw water to produce clean water. Among them, the life of the filter element is positively correlated with the anti-clogging area of the filter net. As the use time of the filter element increases, more and more impurities will accumulate on the filter net, causing the flux of the filter element to decrease, and then resulting in a decrease in the water output of the whole machine. The service life of existing filter elements is short, and the replacement time is about 1 year. Therefore, how to improve the service life of the filter element has become a technical bottleneck that limits the frequency of filter element replacement. Utility Model Content
[0003] The utility model aims to provide a filter element reverse flushing structure and water purification equipment to solve the problem that the filter screen of the existing filter element is easily blocked by impurities, resulting in a short service life of the filter element.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] The utility model provides a filter element reverse flushing structure, comprising:
[0006] A shell, wherein the shell is provided with an air filling port, a backwash water inlet port and a backwash water outlet port;
[0007] A central tube is arranged in the shell, and a gas injection hole is arranged on the tube wall of the central tube;
[0008] A filter module is arranged in the shell and sleeved on the outside of the central tube;
[0009] An airbag assembly is arranged in the shell, the airbag assembly includes a water accumulation cavity and an airbag arranged in the water accumulation cavity, and the airbag is connected to the central tube;
[0010] In which, a backwash water channel and an air charging channel are provided in the shell, the backwash water inlet, the water accumulation cavity and the backwash drain port are connected through the backwash water channel, and the backwash water channel passes through the outside of the filter module, the air charging port and the air bag are connected through the air charging channel, when the air bag is compressed under the water pressure in the water accumulation cavity, the gas in the air bag overflows and flushes the inside of the filter module through the central tube, so that impurities attached to the filter module are flushed away and discharged through the backwash water channel.
[0011] Furthermore, the central pipe comprises a first pipe section and a second pipe section which are not connected to each other, the pipe wall of the first pipe section is provided with the air injection holes, and the pipe wall of the second pipe section is provided with water holes.
[0012] Furthermore, one end of the first tube section is open and extends into the interior of the airbag.
[0013] Furthermore, the filter module includes at least two types of filter screens.
[0014] Furthermore, the filter module is composed of a PP cotton filter and an activated carbon filter.
[0015] Furthermore, the activated carbon filter is sleeved on the outside of the second pipe section, one end of the PP cotton filter is sleeved on the outside of the activated carbon filter, and the other end is sleeved on the outside of the first pipe section.
[0016] Furthermore, the water accumulation cavity is cylindrical.
[0017] Furthermore, the inflation port, the recoil water inlet and the recoil water outlet are arranged at the same end of the shell.
[0018] The utility model also provides a water purification device, comprising a filter element device having the filter element reverse flushing structure as described above.
[0019] Furthermore, the water purification equipment is a water purifier or a drinking water purifier.
[0020] The beneficial effects of the filter element backwashing structure and water purification equipment provided by the utility model are as follows: compared with the prior art, the utility model utilizes the internal accumulated water volume to realize air bag exhaust, and utilizes the air bag exhaust to realize reverse flushing of the filter module, so that the impurities that cause the filter module to be blocked are discharged through the backwashing water channel after reverse flushing, thereby restoring the filter element to its original filtering effect and maintaining the original flux, thereby achieving an extension of the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0022] Figure 1 A front view of a filter element device with a filter element reverse flushing structure provided in an embodiment of the utility model;
[0023] Figure 2 For along Figure 1 The cross-sectional structure diagram of the middle BB line;
[0024] Figure 3 for Figure 2 The enlarged view at E in the figure;
[0025] Figure 4 For along Figure 1 Cross-sectional structural diagram of the center CC line;
[0026] Figure 5 A three-dimensional diagram of a filter element device with a filter element reverse flushing structure provided in an embodiment of the utility model;
[0027] Figure 6 A front view of a filter element device with a filter element reverse flushing structure after removing the outer shell provided by an embodiment of the utility model;
[0028] Figure 7 For along Figure 6 The cross-sectional structure diagram along the AA line;
[0029] Figure 8 For along Figure 6 Cross-sectional structural diagram of the middle DD line;
[0030] Fig. 9 A three-dimensional diagram of a filter element device with a filter element reverse flushing structure after removing the outer shell provided by an embodiment of the utility model;
[0031] Fig.10 The direction of water flow when the filter element device provided by the embodiment of the utility model performs filtering processing;
[0032] Fig.11 The airflow direction when the filter element device provided by the embodiment of the utility model performs backwashing treatment;
[0033] Among them, the main marks of the drawings in the figure are:
[0034] 1. Shell; 11. Interface; 2. Center tube; 21. First pipe section; 22. Second pipe section; 23. Blocking piece; 3. Filter module; 31. PP cotton filter; 32. Activated carbon filter; 4. Airbag assembly; 41. Water accumulation cavity; 42. Airbag. DETAILED DESCRIPTION
[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0036] See also Figure 1 , Figure 2The filter element backwashing structure provided in this embodiment includes a housing 1, a central tube 2, a filter module 3 and an airbag assembly 4.
[0037] In this example, see Figure 1 , Figure 4 , Figure 5 The outer shape of the shell 1 is roughly cylindrical, and the shell 1 has a receiving cavity for accommodating the central tube 2, the filter module 3 and the airbag assembly 4. Five interfaces 11 are provided on the shell 1, namely, a filter water inlet, a filter water outlet, an air charging port, a backwash water inlet and a backwash drain port. Among them, the filter water inlet and the backwash water inlet are respectively connected to the external water supply device through a pipe, and the air charging port is connected to the external air supply device through a pipe. At the same time, the five interfaces 11 are arranged at the same end of the shell 1. It can be understood that in other embodiments, the five interfaces 11 can be respectively arranged at different positions on the shell 1.
[0038] In this example, see Figure 2 , Figure 3 The central tube 2 is arranged in the housing 1, and the central tube 2 includes a first tube section 21 and a second tube section 22 which are not connected to each other. The tube wall of the first tube section 21 is provided with an air injection hole, and the tube wall of the second tube section 22 is provided with a water passing hole. Figure 3 As described above, a plugging piece 23 is provided inside the central tube 2. The plugging piece 23 can divide the central tube 2 into two mutually incommunicative tube sections, namely, the first tube section 21 and the second tube section 22, thereby ensuring that only air flows through the first tube section 21 and only water flows through the second tube section 22. At the same time, one end of the first tube section 21 away from the second tube section 22 and one end of the second tube section 22 away from the first tube section 21 are both open.
[0039] In this example, see Figure 2 , Figure 3 , Figures 6 to 9 , the filter module 3 is arranged in the housing 1 and sleeved on the outside of the central tube 2. The filter module 3 includes at least two types of filter screens. The filter module 3 is composed of a PP cotton filter screen 31 and an activated carbon filter screen 32. The activated carbon filter screen 32 is sleeved on the outside of the second pipe section 22, one end of the PP cotton filter screen 31 is sleeved on the outside of the activated carbon filter screen 32, and the other end is sleeved on the outside of the first pipe section 21. Among them, the PP cotton filter screen 31 can remove sediment, suspended matter, colloid, rust, etc. in the raw water, and the activated carbon filter screen 32 can remove odor, residual chlorine, chloroform, etc. in the water.
[0040] In this example, see Figure 2 , Figure 3 , Figures 6 to 9The airbag assembly 4 is arranged in the housing 1, and includes a water accumulation cavity 41 and an airbag 42 arranged in the water accumulation cavity 41. The water accumulation cavity 41 is cylindrical. The airbag 42 is communicated with the first pipe section 21 of the central pipe 2.
[0041] In this embodiment, a backwash water channel (not shown in the figure) and an inflation channel (not shown in the figure) are provided in the housing 1. The backwash water inlet, the water accumulation cavity 41 and the backwash drain are connected through the backwash water channel, and at the same time, the backwash water channel passes through the outside of the filter module 3. It is understandable that a backwash water channel is formed between the inside of the housing 1 and the water accumulation cavity 41 and the filter module 3, and the setting of the backwash water channel can guide the water entering through the backwash water inlet to flow through the inside of the water accumulation cavity 41 and the outside of the filter module 3 in sequence and then be discharged through the backwash drain. The inflation port and the airbag 42 are connected through the inflation channel to inflate the airbag 42. It is understandable that an inflation channel for connecting the inflation port and the airbag 42 is formed by the internal structure of the housing 1.
[0042] When water accumulates in the water accumulation cavity 41 , the airbag 42 is compressed under the water pressure in the water accumulation cavity 41 , and the gas in the airbag 42 overflows and flushes the inside of the filter module 3 , so that impurities attached to the filter module 3 are flushed away and discharged through the backwash water channel.
[0043] The present embodiment utilizes the internal accumulated water volume to realize the exhaust of the airbag 42, and utilizes the exhaust of the airbag 42 to realize the reverse flushing of the filter module 3. The impurities that cause the filter module 3 to be blocked are discharged through the backwash water channel after reverse flushing, so that the filter element is restored to the original filtering effect and the original flux is maintained, thereby realizing the extension of the service life of the filter element.
[0044] For a better understanding, let's combine Figures 1 to 11 The filter element reverse flushing structure provided in this embodiment and the filter element device using the same are described in more detail:
[0045] like Figures 1 to 9As shown, the filter element device provided in this embodiment includes a filter element backwashing structure, which includes a housing 1, a central tube 2, a filter module 3 and an airbag assembly 4. Among them, five interfaces 11 are provided on one end of the housing 1, which are a filter water inlet, a filter water outlet, an air filling port, a backwash water inlet and a backwash drain port. The central tube 2 is divided into a first pipe section 21 and a second pipe section 22 that are not connected to each other along its axial direction. The pipe wall of the first pipe section 21 is provided with an air jet hole, and the pipe wall of the second pipe section 22 is provided with a water hole. The filter module 3 includes a PP cotton filter 31 and an activated carbon filter 32. The activated carbon filter 32 is sleeved on the outside of the second pipe section 22. One end of the PP cotton filter 31 is sleeved on the outside of the activated carbon filter 32, and the other end is sleeved on the outside of the first pipe section 21. It can be understood that a water sealing area is also provided between the PP cotton filter 31 and the first pipe section 21, so that the water filtered by the PP cotton filter 31 can only flow to the activated carbon filter 32 for further filtration. The airbag assembly 4 includes a water accumulation cavity 41 and an airbag 42 placed in the water accumulation cavity 41. The end of the first pipe section 21 in the central tube 2 away from the second pipe section 22 is open and extends into the airbag 42, and the end of the second pipe section 22 in the central tube 2 away from the first pipe section 21 is open and connected to the filter water outlet. At the same time, the filter element device provided in this embodiment is formed with a backwash water channel, an air charging channel and a filter water channel in the shell 1 through the internal structure of the shell 1, the backwash water inlet, the water accumulation cavity 41 and the backwash drain are connected through the backwash water channel, the air charging port and the airbag 42 are connected through the air charging channel, and the filter water inlet, the second pipe section 22 and the filter water outlet are connected through the filter water channel.
[0046] It is understandable that for the filter element device provided in this embodiment, the core components are PP cotton and activated carbon structure, and the service life of the whole filter element is positively correlated with the anti-blocking area of PP cotton. Because PP cotton is the primary filter layer, if there is obvious fouling and blocking, the flow of other filter layers will drop significantly before the end of the service life. At present, there is no optimization plan in the industry to achieve the repeated use of PP cotton except for expanding the use area of PP cotton, but the filter element is limited by the structure and there is no extra space to accommodate a larger area of PP cotton filter element. Therefore, how to improve the service life of PP cotton has become a technical bottleneck problem that limits the frequency of filter element replacement. In order to solve the above problems, this embodiment improves the structure of the filter element device, adds an airbag assembly, and uses the airbag to regularly exhaust air to achieve reverse flushing of the PP cotton and activated carbon structure. Not only can the large particles deposited on the PP cotton be discharged through the backwash water channel after reverse flushing, thereby increasing the service life of the filter element, but also the gap between the activated carbon and the PP cotton is re-expanded during the reverse flushing process, which can further improve the service life of the filter element.
[0047] like Fig.10 As shown, Fig.10The water flow direction when the filter element device performs filtering treatment is shown. Raw water enters the housing through the filter water inlet, then flows through the PP cotton filter 31, the activated carbon filter 32 and the second pipe section 22 of the central pipe 2 through the filter water channel, and finally the clean water is discharged from the filter water outlet.
[0048] like Fig.11 As shown, Fig.11 The airflow direction when the filter element device performs backwashing treatment is shown. Before actual use, the airbag 42 is in a full air state. The raw water enters the shell through the backwash water inlet, and then enters the water accumulation cavity 41 through the backwash water channel. Under the action of the water pressure in the water accumulation cavity 41, the gas in the airbag 42 overflows to reversely flush the activated carbon filter 32 and the PP cotton filter 31, and the gas pressure can be effectively used to flush away the impurities that have been attached to each layer of the filter and discharge them through the backwash water channel, finally realizing the recovery of the filter core filtration level.
[0049] Compared with the existing filter element structure, the increase in the overall structural space of this embodiment is ≤1 / 3. Not only is the PP cotton usable area larger and the effective filtration time longer, but the internal accumulated water volume is also used to realize the exhaust backwashing of the airbag, and the PP cotton filter net that is in a semi-blocked state is reversely flushed, and the blocked particles are flushed and flow into the raw water, so that the filter element still maintains the original filtering effect and the original flux, extending the life of the filter element and extending the service life of the filter element. It is estimated that the life of the filter element can be extended by 0.5 years, and the airbag can be repeatedly inflated and used, which can realize the function of regular reverse flushing of the filter element, and the life of the filter element can be further extended.
[0050] This embodiment also provides a water purification device, which includes a filter element device with the filter element backwashing structure described above, and the water purification device can be a water purifier or a water purifier. Due to the use of the filter element device with backwashing function, the service life of the filter element of the water purification device is extended.
[0051] It should be noted that, in the description of the present utility model, when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.
[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A filter element reverse flushing structure, characterized in that: include: A shell, wherein the shell is provided with an air filling port, a backwash water inlet port and a backwash water outlet port; A central tube is arranged in the shell, and a gas injection hole is arranged on the tube wall of the central tube; A filter module is arranged in the shell and sleeved on the outside of the central tube; An airbag assembly is arranged in the shell, the airbag assembly includes a water accumulation cavity and an airbag disposed in the water accumulation cavity, and the airbag is communicated with the central tube; In which, a backwash water channel and an air charging channel are provided in the shell, the backwash water inlet, the water accumulation cavity and the backwash drain port are connected through the backwash water channel, and the backwash water channel passes through the outside of the filter module, the air charging port and the air bag are connected through the air charging channel, when the air bag is compressed under the water pressure in the water accumulation cavity, the gas in the air bag overflows and flushes the inside of the filter module through the central tube, so that impurities attached to the filter module are flushed away and discharged through the backwash water channel.
2. The filter element reverse flushing structure according to claim 1, characterized in that: The central pipe comprises a first pipe section and a second pipe section which are not connected to each other. The jet holes are arranged on the pipe wall of the first pipe section, and the water holes are arranged on the pipe wall of the second pipe section.
3. The filter element reverse flushing structure according to claim 2, characterized in that: One end of the first tube section is open and extends into the interior of the airbag.
4. The filter element reverse flushing structure according to claim 2, characterized in that: The filter module includes at least two types of filter screens.
5. The filter element reverse flushing structure according to claim 4, characterized in that: The filter module consists of a PP cotton filter and an activated carbon filter.
6. The filter element reverse flushing structure according to claim 5, characterized in that: The activated carbon filter is sleeved on the outside of the second pipe section, one end of the PP cotton filter is sleeved on the outside of the activated carbon filter, and the other end is sleeved on the outside of the first pipe section.
7. The filter element reverse flushing structure according to claim 1, characterized in that: The water accumulation cavity is cylindrical.
8. The filter element reverse flushing structure according to claim 1, characterized in that: The inflation port, the recoil water inlet and the recoil water outlet are arranged at the same end of the shell.
9. A water purification device, characterized in that: A filter element device comprising a filter element reverse flushing structure as described in any one of claims 1 to 8.
10. The water purification device according to claim 9, characterized in that: The water purification equipment is a water purifier or a drinking water purifier.