Filter element assembly and water purification equipment

Abstract

The utility model relates to the technical field of water purification, and discloses a filter element assembly and water purification equipment, the filter element assembly comprises a filter shell, a composite filter element and an ultrasonic cleaner, a first filter cavity and a second filter cavity which are independent are arranged in the filter shell, the composite filter element comprises a first-stage filter element and a second-stage filter element, the first-stage filter element is arranged in the first filter cavity, the second-stage filter element is arranged in the second filter cavity, and the ultrasonic cleaner is arranged in the first filter cavity. The ultrasonic cleaner is mounted on the filter shell, is communicated with at least one of the first filter cavity and the second filter cavity and is used for sending ultrasonic waves to a solution in the first filter cavity and / or the second filter cavity so as to realize ultrasonic cleaning of the primary filter element and / or the secondary filter element. Compared with physical scrubbing or chemical solvent soaking, ultrasonic cleaning of the first-stage filter element and / or the second-stage filter element can be achieved through the arranged ultrasonic cleaner, and compared with physical scrubbing or chemical solvent soaking, ultrasonic cleaning is higher in cleaning efficiency, filter element materials cannot be damaged, the service life of the filter elements is guaranteed, meanwhile, tiny particles in the filter elements can be effectively removed, and the service life of the filter elements is prolonged. The regeneration effect of the filter element is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a filter element assembly and a water purification device. Background Art

[0002] As the core component of a water purifier, the filter element can play a good role in removing impurities from tap water. However, the filter element often accumulates dirt due to long-term use, resulting in a decline in filtration performance. Traditional cleaning methods usually involve physical scrubbing or chemical solvent immersion, which not only have low cleaning efficiency, but also may damage the filter element material and shorten its service life. In addition, these cleaning methods often cannot completely remove the tiny particles inside the filter element, affecting the regeneration effect of the filter element. Summary of the Utility Model

[0003] In view of this, the utility model provides a filter element assembly and a water purification device to solve the problems of low cleaning efficiency of the existing filter element, incomplete cleaning resulting in affecting the regeneration effect of the filter element, and damage to the filter element caused by cleaning.

[0004] The first aspect of the utility model provides a filter element assembly, which includes a filter housing, a composite filter element, and an ultrasonic cleaner. The filter housing has an independent first filter chamber and a second filter chamber inside. The composite filter element includes a primary filter element and a secondary filter element. The primary filter element is installed in the first filter chamber and is used for primary filtration of raw water. The secondary filter element is installed in the second filter chamber and is used for re-filtration of pure water. The ultrasonic cleaner is installed on the filter housing and is in communication with at least one of the first filter chamber and the second filter chamber. The ultrasonic cleaner is used to send ultrasonic waves to the solution in the first filter chamber and / or the second filter chamber to achieve ultrasonic cleaning of the primary filter element and / or the secondary filter element.

[0005] Beneficial effects: In the filter element assembly of this application, the ultrasonic cleaner can be used to achieve ultrasonic cleaning of the primary filter element and / or the secondary filter element. Compared with physical scrubbing or chemical solvent immersion, ultrasonic cleaning not only has higher cleaning efficiency, but also does not damage the filter element material, ensuring its service life. At the same time, it can effectively remove the tiny particles inside the filter element, ensuring the regeneration effect of the filter element.

[0006] In some embodiments, the filter element assembly further includes a controller, and the controller is electrically connected to the ultrasonic cleaner. The controller is used to control the working mode of the ultrasonic cleaner.

[0007] Beneficial effects: The controller is used to control the working mode of the ultrasonic cleaner to achieve the control of the working mode of the ultrasonic cleaner and achieve different cleaning effects.

[0008] In some embodiments, the working modes of the ultrasonic cleaner include continuously sending ultrasonic waves and intermittently sending ultrasonic waves.

[0009] Advantageous effects: The controller can be used to control the ultrasonic cleaner to continuously send ultrasonic waves and intermittently send ultrasonic waves, thereby realizing different cleaning methods for the primary filter element and / or the secondary filter element.

[0010] In some embodiments, based on the fact that the ultrasonic cleaner communicates with the first filter cavity, the filter housing is provided with a mounting hole, and the ultrasonic cleaner is sealingly installed in the mounting hole and partially extends into the first filter cavity.

[0011] Advantageous effects: The ultrasonic cleaner is installed on the filter housing through the mounting hole, and the ultrasonic cleaner communicates with the first filter cavity to perform ultrasonic cleaning on the primary filter element.

[0012] In some embodiments, the ultrasonic cleaner includes a generator contact end, a generator mounting section, and a generator body. The generator contact end is located in the first filter cavity, the generator mounting section and the generator contact end are fixedly connected, the generator mounting section is sealingly installed in the mounting hole of the filter housing, and the generator body is located outside the filter housing and is fixedly connected to one end of the generator mounting section away from the generator contact end.

[0013] Advantageous effects: The ultrasonic cleaner is installed and fixed on the filter housing through the generator mounting section. The generator body is used for electrical connection with a power source to control the generator contact end to send ultrasonic waves into the first filter cavity.

[0014] In some embodiments, the filter housing includes a filter bottle body and a filter bottle cap. The bottom of the filter bottle body is open, the top of the filter bottle body is sealed and has the mounting hole, and the filter bottle cap is sealingly installed at the open end of the filter bottle body.

[0015] Advantageous effects: The filter housing is configured to include a filter bottle body and a filter bottle cap, which is convenient for manufacturing and also convenient for assembling components such as the composite filter element inside the filter housing.

[0016] In some embodiments, the filter bottle cap and the filter bottle body are detachably connected.

[0017] Advantageous effects: The filter bottle cap and the filter bottle body are detachably connected, which is convenient for disassembling and assembling between the filter bottle cap and the filter bottle body, and is also convenient for overhauling and replacing the internal composite filter element.

[0018] In some embodiments, a cross-shaped protrusion is provided on the outer surface of the filter bottle cap, and / or a secondary filter element support position is provided on the inner surface of the filter bottle cap, and the secondary filter element is installed at the secondary filter element support position.

[0019] Beneficial effects: The cross-shaped protrusion can engage with external tools, thereby facilitating and labor-saving rotation of the filter bottle cap to open the filter bottle body. The setting of the secondary filter element support position can facilitate the installation of the secondary filter element and also support and position the bottom of the secondary filter element to ensure its stability during use.

[0020] In some embodiments, the filter element assembly further includes a partition portion disposed in the filter housing. A first filter chamber is formed between the outer wall of the partition portion and the inner wall of the filter housing, and a second filter chamber is formed in the inner cavity of the partition portion.

[0021] Beneficial effects: The partition portion can divide the inner cavity of the filter housing to form a first filter chamber between the outer wall of the partition portion and the inner wall of the filter housing, and a second filter chamber in the inner cavity of the partition portion, which facilitates the installation of the primary filter element and the secondary filter element.

[0022] In some embodiments, a plurality of support portions are annularly arranged on the outer periphery of the partition portion, and the plurality of support portions are in contact with the inner wall of the filter housing.

[0023] Beneficial effects: The plurality of support portions provided can support the periphery of the partition portion to ensure the installation stability of the partition portion in the filter housing.

[0024] In some embodiments, the primary filter element is sleeved on the outer periphery of the partition portion and there is a first gap between the two. Raw water can pass through the primary filter element and flow along the first gap to the outside of the filter housing.

[0025] Beneficial effects: The partition portion realizes the installation and fixation of the primary filter element, and a first gap is formed between the inner wall of the primary filter element and the outer wall of the partition portion. The raw water in the first filter chamber can enter the first gap after being filtered by the primary filter element and then flow to the outside of the filter housing.

[0026] In some embodiments, the secondary filter element is disposed in the inner cavity of the partition portion and there is a second gap between the two. Pure water can flow into and pass through the secondary filter element along the second gap for filtration.

[0027] Beneficial effects: The partition portion realizes the outer peripheral installation limit of the secondary filter element, and a second gap is formed between the outer wall of the secondary filter element and the inner wall of the partition portion. Pure water can flow into the second gap and flow to the outside of the filter housing after being filtered by the secondary filter element.

[0028] In some embodiments, the filter housing has a first water inlet and a first water outlet, and the first water inlet communicates with the first filter chamber; the filter element assembly further includes a water circuit board disposed in the filter housing and sealingly connected to the partition portion. The water circuit board has a first water circuit, and the first gap communicates with the first water outlet through the first water circuit. Raw water flows into the first filter chamber from the first water inlet, and after being filtered by the primary filter element, it flows into the first water circuit from the first gap and flows through the first water circuit to the first water outlet.

[0029] Advantageous effects: The primary filter element and the filter housing are connected through the first water circuit, eliminating the need for internal pipeline arrangements within the filter element assembly, simplifying the overall structure of the filter element assembly and making it more compact.

[0030] In some embodiments, the filter housing has a second water inlet and a second water outlet. The water circuit board has a second water circuit and a third water circuit. The second gap communicates with the second water inlet through the second water circuit, and the central flow channel of the secondary filter element communicates with the second water outlet through the third water circuit. Pure water flows through the second water circuit from the second water inlet and then into the second gap, and after being filtered by the secondary filter element, it flows into the third water circuit from the central flow channel of the secondary filter element and flows through the third water circuit to the second water outlet.

[0031] Advantageous effects: The secondary filter element and the filter housing are connected through the second water circuit and the third water circuit, thereby realizing the inflow and outflow of pure water. At the same time, the first water circuit, the second water circuit, and the third water circuit are integrally arranged on the water circuit board, eliminating the need for internal pipeline arrangements, further simplifying the overall structure of the filter element assembly and making it more compact.

[0032] In some embodiments, a first mounting position is provided on a surface of the water circuit board facing the second filter chamber, and an end portion of the primary filter element is sealingly inserted into the first mounting position.

[0033] Advantageous effects: The first mounting position provided on the water circuit board facilitates the installation of the primary filter element, and sealingly inserting the end portion of the primary filter element into the first mounting position seals the first gap, preventing the raw water filtered by the primary filter element from leaking back into the first filter chamber from the connection between the primary filter element and the first mounting position.

[0034] In some embodiments, a second mounting position is provided on a surface of the water circuit board facing the second filter chamber. The second mounting position is located inside the first mounting position, and an end portion of the partition portion is sealingly inserted into the second mounting position.

[0035] Beneficial effects: The second installation position provided on the water channel board facilitates the installation of the partition part, and the end part of the partition part is hermetically inserted into the second installation position to achieve the sealed partition of the first gap and the second gap, preventing the raw water in the first gap from flowing into the second gap and the pure water in the second gap from flowing into the first gap, ensuring the independence of the filtration of the primary filter element and the secondary filter element respectively.

[0036] In some embodiments, a third installation position is provided on the surface of the water channel board facing the second filter cavity, the third installation position is located inside the second installation position, and the end part of the secondary filter element is hermetically inserted into the third installation position.

[0037] Beneficial effects: The third installation position provided on the water channel board facilitates the installation of the secondary filter element, and the end part of the secondary filter element is hermetically inserted into the third installation position to achieve the sealed partition of the second gap and the central flow channel, preventing the pure water in the second gap from flowing into the central flow channel and the purified water filtered by the secondary filter element from flowing into the second gap from the central flow channel, ensuring the sealed partition between the second gap and the central flow channel.

[0038] In some embodiments, a first sealing member is provided between the outer wall of the primary filter element and the inner wall of the first installation position; and / or, a second sealing member is provided between the outer wall of the partition part and the inner wall of the second installation position; and / or, a third sealing member is provided between the outer wall of the secondary filter element and the inner wall of the third installation position.

[0039] Beneficial effects: The first sealing member realizes the seal between the outer wall of the primary filter element and the inner wall of the first installation position, the second sealing member realizes the seal between the outer wall of the partition part and the inner wall of the second installation position, and the third sealing member realizes the seal between the outer wall of the secondary filter element and the inner wall of the third installation position, ensuring the sealing reliability of the cooperation of each structure.

[0040] In some embodiments, the primary filter element includes a first filter medium, a first upper end cap and a first lower end cap, the first filter medium is sleeved on the outer periphery of the partition part, the first upper end cap is connected to the top end of the first filter medium, the first upper end cap is hermetically inserted into the first installation position, the first lower end cap is connected to the bottom end of the first filter medium, and the first lower end cap is hermetically fitted with the outer wall of the partition part.

[0041] Beneficial effects: The first upper end cap and the first lower end cap respectively support the top and bottom of the first filter medium and facilitate the installation and connection of the first filter medium. Through the sealed cooperation between the first upper end cap and the first installation position and the sealed cooperation between the first lower end cap and the partition part, a sealed first gap can be formed.

[0042] In some embodiments, the secondary filter element includes a second filter medium, a second upper end cap, and a second lower end cap. The second filter medium is disposed in the inner cavity of the partition portion. The center of the second filter medium has a central flow channel communicating with the third water channel of the water circuit board. The second upper end cap is connected to one end of the top of the second filter medium. The second upper end cap is hermetically inserted into the third installation position. The second lower end cap is connected to one end of the bottom of the second filter medium. The second lower end cap is hermetically fitted with the inner wall of the partition portion, and the second lower end cap abuts and supports the bottom of the filter housing.

[0043] Advantageous effects: The second upper end cap and the second lower end cap respectively support the top and bottom of the second filter medium, and facilitate the installation and connection of the second filter medium. Through the hermetic fit between the second upper end cap and the third installation position, and the hermetic fit between the second lower end cap and the partition portion, the second gap and the intermediate flow channel can be hermetically separated to ensure their respective independent sealing properties.

[0044] In some embodiments, the second filter medium includes a first sub-filter medium and a second sub-filter medium. The first sub-filter medium is connected to the second upper end cap. The second sub-filter medium is connected to the second lower end cap. The central flow channel is opened in the center of the second sub-filter medium. The first sub-filter medium communicates with the central flow channel. Pure water is filtered through the second sub-filter medium and enters the central flow channel, and then flows through the first sub-filter medium and is filtered and then flows into the third water channel. The secondary filter element further includes a third end cap. The first sub-filter medium and the second sub-filter medium are connected through the third end cap.

[0045] Advantageous effects: The second filter medium is configured in the form of a first sub-filter medium and a second sub-filter medium. The second upper end cap and the third end cap realize the installation and support of the first sub-filter medium, and the second lower end cap and the third end cap realize the installation and support of the second sub-filter medium. Pure water is filtered sequentially through the second sub-filter medium and the first sub-filter medium, further improving the quality of pure water.

[0046] In some embodiments, there is a hermetic fit between the outer wall of the first sub-filter medium and the inner wall of the third end cap; and / or, there is a hermetic fit between the outer wall of the second sub-filter medium and the inner wall of the third end cap.

[0047] Advantageous effects: The hermetic fit between the outer wall of the first sub-filter medium and the inner wall of the third end cap can prevent the pure water inside the first sub-filter medium from flowing into the second gap and prevent the pure water in the second gap from flowing into the first sub-filter medium without being filtered. The hermetic fit between the outer wall of the second sub-filter medium and the inner wall of the third end cap can prevent the pure water in the second gap from flowing into the central flow channel without being filtered and prevent the pure water in the central flow channel from flowing back into the second gap.

[0048] The second aspect of the present utility model provides a water purification device, including the filter element assembly of the present utility model.

[0049] Beneficial effects: Since the water purification device of the present utility model includes the filter element assembly of the present utility model, it has the same technical effects as the filter element assembly, and the present utility model will not elaborate herein. Description of the Drawings

[0050] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0051] Figure 1 Schematic diagram of the overall structure of the filter element assembly according to an embodiment of the present utility model;

[0052] Figure 2 Schematic diagram of the three-dimensional exploded structure of the filter element assembly according to an embodiment of the present utility model;

[0053] Figure 3 Schematic diagram of the structure of the filter bottle body according to an embodiment of the present utility model;

[0054] Figure 4 Top view structure diagram of the filter bottle cap according to an embodiment of the present utility model;

[0055] Figure 5 Bottom view structure diagram of the filter bottle cap according to an embodiment of the present utility model;

[0056] Figure 6 Cross-sectional view of the primary filter element according to an embodiment of the present utility model;

[0057] Figure 7 Cross-sectional view of the secondary filter element according to an embodiment of the present utility model;

[0058] Figure 8 Top view structure diagram of the water circuit board according to an embodiment of the present utility model;

[0059] Figure 9 Bottom view structure diagram of the water circuit board according to an embodiment of the present utility model;

[0060] Figure 10 Cross-sectional view of the water circuit board along the first water circuit according to an embodiment of the present utility model;

[0061] Figure 11 Cross-sectional view of the water circuit board along the second water circuit and the third water circuit according to an embodiment of the present utility model;

[0062] Figure 12Schematic structural diagram of a partition part according to an embodiment of the present utility model;

[0063] Figure 13 Schematic perspective exploded structural diagram of an ultrasonic cleaner according to an embodiment of the present utility model;

[0064] Figure 14 Cross-sectional view of an ultrasonic cleaner according to an embodiment of the present utility model;

[0065] Figure 15 Cross-sectional view of a filter element assembly according to an embodiment of the present utility model;

[0066] Figure 16 Schematic diagram of raw water flow when the primary filter element of a filter element assembly according to an embodiment of the present utility model is working;

[0067] Figure 17 Schematic diagram of pure water flow when the secondary filter element of a filter element assembly according to an embodiment of the present utility model is working.

[0068] Explanation of reference numerals

[0069] 10. Filter housing; 11. Filter bottle body; 111. Mounting hole; 112. First water inlet; 113. First water outlet; 114. Second water inlet; 115. Second water outlet; 12. Filter bottle cap; 121. Cross-shaped protrusion; 122. Secondary filter element support position; 13. First filter chamber; 14. Second filter chamber;

[0070] 20. Composite filter element; 21. Primary filter element; 211. First filter material; 212. First upper end cap; 213. First lower end cap; 22. Secondary filter element; 221. Second filter material; 2211. First sub-filter material; 2212. Second sub-filter material; 222. Central flow channel; 223. Second upper end cap; 224. Second lower end cap; 225. Third end cap;

[0071] 30. Ultrasonic cleaner; 31. Generator contact end; 311. Abutting protrusion; 32. Generator installation section; 321. Installation thread; 33. Generator main body; 34. Generator gasket; 35. Locking nut;

[0072] 40. Partition part; 41. Support part; 42. First gap; 43. Second gap;

[0073] 50. Water circuit board; 51. First water circuit; 52. Second water circuit; 53. Third water circuit; 54. First installation position; 55. Second installation position; 56. Third installation position; 57. First seal; 58. Second seal; 59. Third seal. Detailed implementation manners

[0074] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0075] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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 should not be construed as a limitation to the present utility model.

[0076] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0077] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0078] The following Figures 1 to 17 , describe the embodiments of the present utility model.

[0079] As Figures 1 to 14 shown, according to an embodiment of the present utility model, on the one hand, a filter element assembly is disclosed, which includes a filter housing 10, a composite filter element 20, and an ultrasonic cleaner 30. Among them, the filter housing 10 has an independent first filter chamber 13 and a second filter chamber 14 inside. The composite filter element 20 includes a primary filter element 21 and a secondary filter element 22. The primary filter element 21 is installed in the first filter chamber 13 for primary filtration of raw water, and the secondary filter element 22 is installed in the second filter chamber 14 for re-filtration of pure water. The ultrasonic cleaner 30 is installed on the filter housing 10 and the ultrasonic cleaner 30 is in communication with at least one of the first filter chamber 13 and the second filter chamber 14. The ultrasonic cleaner 30 is used to send ultrasonic waves to the solution in the first filter chamber 13 and / or the second filter chamber 14 to achieve ultrasonic cleaning of the primary filter element 21 and / or the secondary filter element 22.

[0080] For the filter element assembly of the present application, the ultrasonic cleaner 30 provided can achieve ultrasonic cleaning of the primary filter element 21 and / or the secondary filter element 22. Compared with physical scrubbing or chemical solvent immersion, ultrasonic cleaning not only has higher cleaning efficiency, but also does not damage the filter element material, ensuring its service life. At the same time, it can effectively remove the tiny particles inside the filter element, ensuring the regeneration effect of the filter element.

[0081] In some embodiments, the filter housing 10 includes a filter bottle body 11 and a filter bottle cap 12. Among them, one end of the bottom of the filter bottle body 11 is open, one end of the top of the filter bottle body 11 is closed, and the filter bottle cap 12 is sealingly installed on the open end of the filter bottle body 11.

[0082] Setting the filter housing 10 to include the filter bottle body 11 and the filter bottle cap 12 is convenient for manufacturing and also convenient for assembling components such as the composite filter element 20 inside the filter housing 10.

[0083] In some embodiments, the filter housing 10 is provided with a first water inlet 112, a first water outlet 113, a second water inlet 114, and a second water outlet 115. The first water inlet 112 is communicated with the first filter chamber 13. The filter bottle body 11 is cylindrical, and an installation hole 111 is provided at the closed end of the filter bottle body 11. The first water inlet 112, the first water outlet 113, the second water inlet 114, and the second water outlet 115 are all arranged at intervals along the circumferential direction of the installation hole 111. For example, the installation hole 111 is located at the center of the closed end of the filter bottle body 11, and the first water inlet 112, the first water outlet 113, the second water inlet 114, and the second water outlet 115 are evenly distributed at intervals of ninety degrees in sequence along the circumferential direction of the installation hole 111, but it is not limited thereto.

[0084] The first water inlet 112 is connected to the raw water inlet end, the second water inlet 114 is connected to the fine filter element to receive the pure water filtered by the fine filter element, and the second water outlet 115 is connected to the external water intake end so that the filtered clean water flows to the water intake end for use.

[0085] The shapes of the filter bottle cap 12 and the filter bottle body 11 match each other, and specifically can be set to be circular to match the cylindrical filter bottle body 11.

[0086] In some embodiments, the filter bottle cap 12 and the filter bottle body 11 are detachably connected. This is convenient for the disassembly and assembly between the filter bottle cap 12 and the filter bottle body 11, and is convenient for overhauling and replacing the internal composite filter element 20.

[0087] For example, internal threads can be provided on the inner wall of the filter bottle cap 12, and external threads matching the internal threads can be provided on the outer wall of the filter bottle body 11. The filter bottle body 11 is screwed tightly into the filter bottle cap 12 to achieve the detachable connection between the two, but it is not limited thereto. The filter bottle cap 12 and the filter bottle body 11 can also be detachably connected by means such as snap connection.

[0088] To enhance the connection sealing performance between the filter cap 12 and the filter bottle body 11, in some embodiments, a sealing structure is further provided at the connection between the filter cap 12 and the filter bottle body 11.

[0089] For example, the sealing structure can be in the form of an O-ring, a gasket, or the like.

[0090] Specifically for installation, an annular groove can be provided on the inner wall of the filter cap 12 or the outer wall of the filter bottle body 11. The sealing structure is installed in the annular groove and elastically abuts against the other part to seal the inner cavity of the filter bottle body 11 and prevent the filter element from leaking. For example, an annular groove is provided on the outer wall of the filter bottle body 11, and the sealing structure is installed in the annular groove and elastically abuts against the inner wall of the filter cap 12, but it is not limited to this.

[0091] In terms of the number of settings, to enhance the sealing performance, the sealing structure can be set to multiple and arranged at intervals along the length direction of the filter bottle body 11.

[0092] In some embodiments, a cross-shaped protrusion 121 is provided on the outer surface of the filter cap 12.

[0093] The cross-shaped protrusion 121 can be engaged with an external tool, thereby facilitating and labor-saving rotation of the filter cap 12 to open the filter bottle body 11.

[0094] In some embodiments, a secondary filter element support position 122 is provided on the inner surface of the filter cap 12, and the secondary filter element 22 is installed at the secondary filter element support position 122.

[0095] The setting of the secondary filter element support position 122 can facilitate the installation of the secondary filter element 22 and also support and position the bottom of the secondary filter element 22 to ensure its stability during use.

[0096] Specifically, the secondary filter element support position 122 is located at the central position of the filter cap 12, and a positioning groove is provided at the central part of the secondary filter element support position 122. The bottom surface of the secondary filter element 22 abuts against the secondary filter element support position 122 and is partially inserted into the positioning groove for positioning.

[0097] In some other embodiments, the installation between the filter cap 12 and the filter bottle body 11 can also be a non-detachable structure, such as welding, screw fastening, clamping, a clamp, or other installation structures.

[0098] In some embodiments, the filter element assembly further includes a controller, which is electrically connected to the ultrasonic cleaner 30. The controller is used to control the working mode of the ultrasonic cleaner 30 to achieve control of the working mode of the ultrasonic cleaner 30 and obtain different cleaning effects.

[0099] For example, the operating modes of the ultrasonic cleaner 30 include continuously sending ultrasonic waves and intermittently sending ultrasonic waves. The controller can be used to control the ultrasonic cleaner 30 to continuously send ultrasonic waves and intermittently send ultrasonic waves, so as to achieve different cleaning methods for the primary filter element 21 and / or the secondary filter element 22.

[0100] In this embodiment, the ultrasonic cleaner 30 is communicated with the first filter chamber 13. The ultrasonic cleaner 30 is hermetically installed in the mounting hole 111 and partially extends into the first filter chamber 13 to perform ultrasonic cleaning on the primary filter element 21. Of course, in other embodiments, the ultrasonic cleaner 30 can also be communicated with the second filter chamber 14 to perform ultrasonic cleaning on the secondary filter element 22, which is not limited to this embodiment.

[0101] Specifically in terms of the structure, the ultrasonic cleaner 30 includes a generator contact end 31, a generator mounting section 32, and a generator main body 33. Among them, the generator contact end 31 is located in the first filter chamber 13. The generator mounting section 32 and the generator contact end 31 are fixedly connected. The generator mounting section 32 is hermetically installed in the mounting hole 111 of the filter housing 10. The generator main body 33 is located outside the filter housing 10 and is fixedly connected to one end of the generator mounting section 32 away from the generator contact end 31.

[0102] The ultrasonic cleaner 30 is installed and fixed on the filter housing 10 through the generator mounting section 32. The generator main body 33 is used to be electrically connected to a power source to control the generator contact end 31 to send ultrasonic waves to the first filter chamber 13.

[0103] Specifically, the generator main body 33 is electrically connected to the controller. The controller controls the power on and off of the generator main body 33, thereby controlling the operating mode of the ultrasonic cleaner 30.

[0104] The generator mounting section 32 and the filter housing 10 are detachably connected to facilitate the disassembly, assembly, and replacement of the ultrasonic cleaner 30. For example, the outer periphery of the generator mounting section 32 is provided with a mounting thread 321, and the outer periphery of the generator contact end 31 is provided with an abutting protrusion 311. The generator mounting section 32 is inserted into the mounting hole 111 and the abutting protrusion 311 abuts against the inner wall of the filter housing 10. The locking nut 35 outside the filter housing 10 is screwed onto the mounting thread 321 to clamp the ultrasonic cleaner 30 in the mounting hole 111.

[0105] To further enhance the sealing performance at the installation position of the ultrasonic cleaner 30, the ultrasonic cleaner 30 further includes a generator gasket 34. The generator gasket 34 is arranged between the abutting protrusion 311 and the inner wall of the filter housing 10 to seal the mounting hole 111 and prevent the raw water in the first filter chamber 13 from leaking out from here.

[0106] It should be noted that the above describes in detail the solution where the ultrasonic cleaner 30 is clamped to the filter housing 10 by the locking nut 35. In some other embodiments, the ultrasonic cleaner 30 can also be connected to the filter housing 10 by means of screw fastening, snap connection, clamp, or adhesive fixation, not limited to the above solution.

[0107] Of course, the above-mentioned generator gasket 34 can specifically be an annular gasket, an O-ring, or a special-shaped gasket, etc. This embodiment does not make specific limitations.

[0108] In some embodiments, the filter element assembly further includes a partition portion 40 disposed in the filter housing 10. The partition portion 40 is sealingly connected to the water circuit board 50. A first filter chamber 13 is formed between the outer wall of the partition portion 40 and the inner wall of the filter housing 10, and a second filter chamber 14 is formed in the inner cavity of the partition portion 40.

[0109] The partition portion 40 can divide the inner cavity of the filter housing 10 to form a first filter chamber 13 between the outer wall of the partition portion 40 and the inner wall of the filter housing 10, and a second filter chamber 14 is formed in the inner cavity of the partition portion 40, facilitating the installation of the primary filter element 21 and the secondary filter element 22.

[0110] In this embodiment, the partition portion 40 is in the shape of a through cylindrical tube, and can specifically be set as a cylindrical tube with a smaller diameter at the top and a larger diameter at the bottom. The bottom of the partition portion 40 is sealingly installed on the inner surface of the filter bottle cap 12, and the top of the partition portion 40 is sealingly installed on the water circuit board 50, so that both ends of the partition portion 40 are sealed, and a sealed second filter chamber 14 is formed in cooperation between the inner wall of the partition portion 40, the inner surface of the filter bottle cap 12, and the lower surface of the water circuit board 50.

[0111] In some embodiments, a plurality of support portions 41 are annularly arranged on the outer periphery of the partition portion 40, and the plurality of support portions 41 are in contact with the inner wall of the filter housing 10.

[0112] By providing the plurality of support portions 41, the periphery of the partition portion 40 can be supported to ensure the installation stability of the partition portion 40 in the filter housing 10.

[0113] For example, the support portions 41 can be arranged on the outer periphery of the lower end of the partition portion 40 with a larger diameter. Specifically, four support portions 41 can be arranged at intervals of 90 degrees on the outer periphery of the lower end of the partition portion 40, so as to achieve uniform support around the partition portion 40, but not limited thereto. In other embodiments, the number and installation positions of the partition portions 40 can be adjusted according to needs.

[0114] In some embodiments, the primary filter element 21 is sleeved on the outer periphery of the partition portion 40 and there is a first gap 42 between the two. Raw water can pass through the primary filter element 21 and flow to the outside of the filter housing 10 along the first gap 42.

[0115] The partition part 40 realizes the installation and fixation of the primary filter element 21, and forms a first gap 42 between the inner wall of the primary filter element 21 and the outer wall of the partition part 40. The raw water in the first filter chamber 13 can enter the first gap 42 after being filtered by the primary filter element 21 and then flow to the outside of the filter housing 10.

[0116] In this embodiment, the primary filter element 21 is sleeved on the outer periphery of the upper end of the partition part 40 with a smaller diameter, and the bottom of the primary filter element 21 is abutted and supported by the end of the partition part 40 with a larger diameter.

[0117] In some embodiments, the secondary filter element 22 is arranged inside the partition part 40 and there is a second gap 43 therebetween. The pure water can flow into and pass through the secondary filter element 22 along the second gap 43 for filtration.

[0118] The partition part 40 realizes the outer peripheral installation and limitation of the secondary filter element 22, and forms a second gap 43 between the outer wall of the secondary filter element 22 and the inner wall of the partition part 40. The pure water can flow into the second gap 43 and flow to the outside of the filter housing 10 after being filtered by the secondary filter element 22.

[0119] In this embodiment, the secondary filter element 22 is cylindrical, and its length is the same as that of the partition part 40. The diameter of the secondary filter element 22 is smaller than the inner diameter of the partition part 40, so that the secondary filter element 22 can be inserted into the partition part 40 and a second gap 43 can be formed therebetween.

[0120] In some embodiments, the filter element assembly further includes a water circuit board 50. The water circuit board 50 is arranged in the filter housing 10 and is sealingly connected to the partition part 40. The water circuit board 50 has a first water circuit 51. The first gap 42 is communicated with the first water outlet 113 through the first water circuit 51. The raw water flows into the first filter chamber 13 from the first water inlet 112, and after being filtered by the primary filter element 21, it flows into the first water circuit 51 from the first gap 42 and flows to the first water outlet 113 through the first water circuit 51.

[0121] The primary filter element 21 is communicated with the filter housing 10 through the first water circuit 51, eliminating the internal pipeline setting of the filter element assembly, making the overall structure of the filter element assembly simplified and more compact.

[0122] In some embodiments, the water circuit board 50 has a second water circuit 52 and a third water circuit 53. The second gap 43 is communicated with the second water inlet 114 through the second water circuit 52. The central flow channel 222 of the secondary filter element 22 is communicated with the second water outlet 115 through the third water circuit 53. The pure water flows through the second water circuit 52 from the second water inlet 114 and then flows into the second gap 43, and after being filtered by the secondary filter element 22, it flows into the third water circuit 53 from the central flow channel 222 of the secondary filter element 22 and flows to the second water outlet 115 through the third water circuit 53.

[0123] The secondary filter element 22 and the filter housing 10 are connected through a second water path 52 and a third water path 53, thereby realizing the inflow and outflow of pure water. At the same time, the first water path 51, the second water path 52, and the third water path 53 are integrally arranged on the water path plate 50, eliminating the internal pipeline arrangement, and further simplifying the overall structure of the filter element assembly and making the structure more compact.

[0124] In some embodiments, to ensure the filtering effect of the primary filter element 21, the upper end of the primary filter element 21 can be hermetically connected to the water path plate 50, and the inner wall of the lower end of the primary filter element 21 and the outer wall of the partition portion 40 are hermetically connected, thereby forming a sealed first gap 42, so that the raw water in the first filter chamber 13 can only penetrate through the primary filter element 21 and flow into the first gap 42 after filtration, ensuring the filtered water quality.

[0125] For specific installation, the bottom of the secondary filter element 22 abuts against the secondary filter element support position 122 of the filter bottle cap 12, and the top of the secondary filter element 22 is connected to the water path plate 50. In some embodiments, to ensure the filtering effect of the secondary filter element 22, the upper end of the secondary filter element 22 can be hermetically connected to the water path plate 50, and the outer wall of the lower end of the secondary filter element 22 and the inner wall of the partition portion 40 are hermetically connected, thereby forming a sealed second gap 43, so that the pure water entering the second gap 43 can only penetrate through the secondary filter element 22 and flow out through the central flow channel 222 after filtration, ensuring the pure water filtration quality.

[0126] In some embodiments, a first installation position 54 is provided on one side of the water path plate 50 facing the second filter chamber 14, and the end of the primary filter element 21 is hermetically inserted into the first installation position 54.

[0127] The first installation position 54 provided on the water path plate 50 facilitates the installation of the primary filter element 21, and hermetically inserting the end of the primary filter element 21 into the first installation position 54 realizes the sealing of the first gap 42, preventing the raw water filtered by the primary filter element 21 from leaking back into the first filter chamber 13 from the connection between the primary filter element 21 and the first installation position 54.

[0128] In some embodiments, a first sealing member 57 is provided between the outer wall of the primary filter element 21 and the inner wall of the first installation position 54.

[0129] The first sealing member 57 realizes the sealing between the outer wall of the primary filter element 21 and the inner wall of the first installation position 54, ensuring the sealing reliability.

[0130] In some embodiments, a second installation position 55 is provided on one side of the water path plate 50 facing the second filter chamber 14, the second installation position 55 is located inside the first installation position 54, and the end of the partition portion 40 is hermetically inserted into the second installation position 55.

[0131] The second installation position 55 provided on the water circuit board 50 facilitates the installation of the partition portion 40, and the end of the partition portion 40 is hermetically inserted into the second installation position 55 to achieve the sealed partition of the first gap 42 and the second gap 43, preventing the raw water in the first gap 42 from flowing into the second gap 43 and also preventing the purified water in the second gap 43 from flowing into the first gap 42, ensuring the independence of the filtration of the primary filter element 21 and the secondary filter element 22 respectively.

[0132] In some embodiments, a second seal 58 is provided between the outer wall of the partition portion 40 and the inner wall of the second installation position 55.

[0133] The second seal 58 realizes the seal between the outer wall of the partition portion 40 and the inner wall of the second installation position 55, ensuring the sealing reliability.

[0134] In some embodiments, a third installation position 56 is provided on the side of the water circuit board 50 facing the second filter chamber 14. The third installation position 56 is located inside the second installation position 55, and the end of the secondary filter element 22 is hermetically inserted into the third installation position 56.

[0135] The third installation position 56 provided on the water circuit board 50 facilitates the installation of the secondary filter element 22, and the end of the secondary filter element 22 is hermetically inserted into the third installation position 56 to achieve the sealed partition of the second gap 43 and the central flow channel 222, preventing the purified water in the second gap 43 from flowing into the central flow channel 222 and also preventing the purified water filtered by the secondary filter element 22 from flowing into the second gap 43 from the central flow channel 222, ensuring the sealed partition between the second gap 43 and the central flow channel 222.

[0136] In some embodiments, a third seal 59 is provided between the outer wall of the secondary filter element 22 and the inner wall of the third installation position 56.

[0137] The third seal 59 realizes the seal between the outer wall of the secondary filter element 22 and the inner wall of the third installation position 56, ensuring the sealing reliability.

[0138] In terms of specific forms, the first seal 37, the second seal 38 and the third seal 39 can be O-rings, annular gaskets, etc., and no specific limitation is made in this embodiment.

[0139] In terms of specific structural forms, the first installation position 54, the second installation position 55 and the third installation position 56 are all circular grooves extending in a direction away from the water circuit board 50 along the lower surface of the water circuit board 50, and the diameter of the first installation position 54 > the diameter of the second installation position 55 > the diameter of the third installation. The size of the first installation position 54 matches the diameter of the primary filter element 21, the size of the second installation position 55 matches the diameter of the partition portion 40, and the size of the third installation position 56 matches the diameter of the secondary filter element 22.

[0140] It is understandable that after installation, there is a gap between the inner wall of the primary filter element 21 and the outer wall of the second installation position 55, and there is a gap between the inner wall of the partition portion 40 and the outer wall of the third installation position 56. The first gap 42 communicates with the first water passage 51 of the water circuit board 50 through the gap between the inner wall of the primary filter element 21 and the outer wall of the second installation position 55, and the second water passage 52 of the water circuit board 50 communicates with the second gap 43 through the gap between the inner wall of the partition portion 40 and the outer wall of the third installation position 56.

[0141] In some embodiments, the primary filter element 21 includes a first filter material 211, a first upper end cap 212, and a first lower end cap 213. Among them, the first filter material 211 is sleeved on the outer periphery of the partition portion 40. The first upper end cap 212 is connected to the top end of the first filter material 211. The first upper end cap 212 is hermetically inserted into the first installation position 54. The first lower end cap 213 is connected to the bottom end of the first filter material 211, and there is a sealing fit between the first lower end cap 213 and the outer wall of the partition portion 40.

[0142] The first upper end cap 212 and the first lower end cap 213 respectively support the top and bottom of the first filter material 211, and facilitate the installation and connection of the first filter material 211. Through the sealing fit between the first upper end cap 212 and the first installation position 54, and the sealing fit between the first lower end cap 213 and the partition portion 40, a sealed first gap 42 can be formed.

[0143] The first filter material 211 can specifically be made of activated carbon material to perform primary filtration on the raw water to adsorb large particle impurities in the raw water. However, the type of the first filter material 211 is not limited to this, and it can also be set to be made of a composite of activated carbon and PP cotton.

[0144] For example, the first filter material 211 is cylindrical, and both the first upper end cap 212 and the first lower end cap 213 are circular ring caps and match the first filter material 211. A first annular slot is provided at one end of the first upper end cap 212 facing the first filter material 211, and the top of the first filter material 211 is clamped in the first annular slot. A second annular slot is provided at one end of the first lower end cap 213 facing the first filter material 211, and the bottom of the first filter material 211 is clamped in the second annular slot, thereby realizing the clamping and fixing of the top and bottom of the first filter material 211 respectively.

[0145] A first seal 57 is provided between the outer wall of the first upper end cap 212 and the inner wall of the first installation position 54, and a sealing structure is provided between the inner wall of the first lower end cap 213 and the outer wall of the partition portion 40 to ensure the sealing performance of the first gap 42.

[0146] In some embodiments, the secondary filter element 22 includes a second filter medium 221, a second upper end cap 223, and a second lower end cap 224. Among them, the second filter medium 221 is disposed in the inner cavity of the partition portion 40. The middle of the second filter medium 221 has a central flow channel 222. The second upper end cap 223 is connected to one end of the top of the second filter medium 221. The second upper end cap 223 is hermetically inserted into the third installation position 56. The second lower end cap 224 is connected to one end of the bottom of the second filter medium 221. The second lower end cap 224 is hermetically fitted with the inner wall of the partition portion 40, and the second lower end cap 224 abuts and supports the bottom of the filter housing 10.

[0147] The second upper end cap 223 and the second lower end cap 224 respectively support the top and bottom of the second filter medium 221, facilitating the installation and connection of the second filter medium 221. Through the hermetic fit between the second upper end cap 223 and the third installation position 56, and the hermetic fit between the second lower end cap 224 and the partition portion 40, the sealing separation of the second gap 43 and the intermediate flow channel can be achieved, ensuring their respective independent sealing properties.

[0148] In some embodiments, the second filter medium 221 includes a first sub-filter medium 2211 and a second sub-filter medium 2212. Among them, the first sub-filter medium 2211 is connected to the second upper end cap 223, the second sub-filter medium 2212 is connected to the second lower end cap 224. The central flow channel 222 is opened at the center of the second sub-filter medium 2212. The first sub-filter medium 2211 is communicated with the central flow channel 222. Pure water passes through the second sub-filter medium 2212 for filtration and enters the central flow channel 222, and then flows through the first sub-filter medium 2211 for filtration and then into the third water path 53. The secondary filter element 22 further includes a third end cap 225. The first sub-filter medium 2211 and the second sub-filter medium 2212 are connected through the third end cap 225.

[0149] The second filter medium 221 is arranged in the form of the first sub-filter medium 2211 and the second sub-filter medium 2212. The second upper end cap 223 and the third end cap 225 realize the installation and support of the first sub-filter medium 2211, and the second lower end cap 224 and the third end cap 225 realize the installation and support of the second sub-filter medium 2212. Pure water is filtered successively through the second sub-filter medium 2212 and the first sub-filter medium 2211, further improving the quality of pure water.

[0150] For example, the first sub-filter medium 2211 is a membrane filament filter element, and the second sub-filter medium 2212 is activated carbon. Pure water is adsorbed and filtered by the activated carbon and then flows into the membrane filament filter element through the central flow channel 222 for ultrafiltration. The filtered purified water flows into the third water path 53.

[0151] It should be noted here that by setting the filtration particle sizes of the first sub-filter medium 2211 and the second sub-filter medium 2212, the resistance of pure water passing through them can be made different, so that the pure water first passes through the second sub-filter medium 2212 for filtration and then flows through the first sub-filter medium 2211 for filtration. For example, the filtration particle size of the first sub-filter medium 2211 is smaller than that of the second sub-filter medium 2212, so that the resistance of pure water passing through the first sub-filter medium 2211 is greater than that of passing through the second sub-filter medium 2212. Therefore, the pure water in the second gap 43 will preferentially pass through the second sub-filter medium 2212 for filtration.

[0152] Specifically, the first sub-filter medium 2211 includes a housing and a membrane filament filter medium disposed in the housing. The first sub-filter medium 2211 is cylindrical. Third annular clamping grooves are provided on both the second upper end cover 223 and the third end cover 225. The top and bottom of the first sub-filter medium 2211 are respectively clamped in the third annular clamping grooves on the second upper end cover 223 and the third end cover 225 to achieve clamping and fixing.

[0153] Moreover, the third seal 59 is disposed between the outer wall of the second upper end cover 223 and the inner wall of the third installation position 56, and the outer wall of the first sub-filter medium 2211 and the inner wall of the third end cover 225 are in sealing fit, so as to prevent the pure water inside the first sub-filter medium 2211 from flowing into the second gap 43 and the pure water in the second gap 43 from flowing into the first sub-filter medium 2211 without filtration. For example, a sealing structure is provided between the inner wall of the third end cover 225 and the outer wall of the first sub-filter medium 2211 for sealing.

[0154] The second sub-filter medium 2212 is cylindrical. Fourth annular clamping grooves are provided on both the second lower end cover 224 and the third end cover 225. The top and bottom of the second sub-filter medium 2212 are respectively clamped in the fourth annular clamping grooves on the second lower end cover 224 and the third end cover 225 to achieve clamping and fixing.

[0155] In some embodiments, the outer wall of the second sub-filter medium 2212 and the inner wall of the third end cover 225 are in sealing fit to prevent the pure water in the second gap 43 from flowing into the central flow channel 222 without filtration and the pure water in the central flow channel 222 from flowing back into the second gap 43.

[0156] For example, a sealing structure is provided between the outer wall of the second sub-filter medium 2212 and the inner wall of the third end cover 225 for sealing. Similarly, to prevent the pure water in the second gap 43 from flowing into the first filter chamber 13, a sealing structure is also provided between the outer wall of the second lower end cover 224 and the inner wall of the partition portion 40 for sealing.

[0157] For specific installation, the lower surface of the water circuit board 50 is connected to the primary filter element 21, the partition part 40, and the secondary filter element 22. The upper surface of the water circuit board 50 abuts against the inner wall of the closed end of the filter bottle body 11. At the same time, the bottoms of the partition part 40 and the secondary filter element 22 both abut against the filter bottle cap 12, so as to integrally and fixedly install the water circuit board 50, the primary filter element 21, the partition part 40, and the secondary filter element 22 inside the filter housing 10.

[0158] Furthermore, the water outlet of the first water circuit 51, the water inlet of the second water circuit 52, and the water outlet of the third water circuit 53 all extend into a columnar structure away from the upper surface of the water circuit board 50. The water circuit board 50 is fixed by abutting the columnar structure against the inner wall of the filter housing 10, and the water outlet of the first water circuit 51 is correspondingly communicated with the first water outlet 113, the water inlet of the second water circuit 52 is correspondingly communicated with the second water inlet 114, and the water outlet of the third water circuit 53 is correspondingly communicated with the second water outlet 115.

[0159] The first water circuit 51, the second water circuit 52, and the third water circuit 53 are water flow channels independently opened on the water circuit board 50 respectively. As an arrangement scheme, the second water circuit 52 and the third water circuit 53 are arranged in a straight line on the water circuit board 50, and the first water circuit 51 is arranged perpendicular to the second water circuit 52 and the third water circuit 53.

[0160] Of course, in some other embodiments, the primary filter element 21 and the secondary filter element 22 may also be filter elements such as activated carbon fiber, carbon rod, PP cotton, ultrafiltration membrane, etc., which are specifically selected and set according to the filtration requirements, and are not limited to the above description.

[0161] To facilitate the understanding of the filter element assembly of this embodiment, the working principle is introduced as follows:

[0162] As shown in Figure 15 and Figure 16 , for the primary filter element 21 filtration: raw water flows into the first filter chamber 13 from the first water inlet 112, is filtered by the primary filter element 21 and then enters the first gap 42, flows along the first gap 42 into the first water circuit 51 and flows out of the filter element assembly through the first water outlet 113 via the first water circuit 51, completing the primary filtration of the raw water;

[0163] As shown in Figure 15 and Figure 17 , for the secondary filter element 22 filtration: pure water flows into the second water circuit 52 from the second water inlet 114 and flows into the second gap 43 through the second water circuit 52. The pure water flows along the second gap 43 to the second sub-filter material 2212, is filtered by the second sub-filter material 2212 and then flows to the first sub-filter material 2211 for further filtration and then flows into the third water circuit 53, and flows out of the filter element assembly through the third water circuit 53 and the second water outlet 115, completing the secondary filtration of the pure water;

[0164] When it is necessary to clean the primary filter element 21, the solution flows from the first water outlet 113 through the first water path 51 into the first gap 42, and the primary filter element 21 can be backwashed. The solution after backwashing passes through the primary filter element 21 and enters the first filter chamber 13. At the same time, the controller turns on the ultrasonic cleaner 30 to send ultrasonic waves into the solution, and the ultrasonic waves are used to perform ultrasonic cleaning on the primary filter element 21, so as to completely clean the particulate dirt adhering to the primary filter element 21. The solution after cleaning is discharged from the first water inlet 112.

[0165] Of course, the above description is only for better understanding the filter element assembly of the present application and is not construed as a limitation on the protection scope of the present application. For example, when cleaning the primary filter element 21, the solution can also flow from the first water inlet 112 into the first filter chamber 13. At the same time, the controller turns on the ultrasonic cleaner 30 to send ultrasonic waves into the solution, and ultrasonic cleaning of the primary filter element 21 can also be achieved.

[0166] According to an embodiment of the present invention, in a second aspect, a water purification device is provided, which includes the filter element assembly of the present invention.

[0167] Since the water purification device of this embodiment includes the filter element assembly of this embodiment, it has the same technical effects as the filter element assembly, and will not be elaborated here in this embodiment.

[0168] In summary, by setting the ultrasonic cleaner 30, the present application can use the emitted ultrasonic waves to achieve efficient automatic cleaning of the dirt on the surface of the primary filter element 21 and / or the secondary filter element 22, realize filter element regeneration, and integrate the structures of the primary filter element 21 and the secondary filter element 22, so as to achieve a streamlined and miniaturized design of the internal structure of the filter element assembly to adapt to the installation in a narrow space.

[0169] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A filter element assembly, characterized in that: include: A filter housing (10) having a first filter chamber (13) and a second filter chamber (14) which are independent of each other; A composite filter element (20) comprising a primary filter element (21) and a secondary filter element (22), wherein the primary filter element (21) is installed in the first filter cavity (13) for primary filtering of raw water, and the secondary filter element (22) is installed in the second filter cavity (14) for secondary filtering of pure water; An ultrasonic cleaner (30) is installed on the filter housing (10) and is connected to at least one of the first filter chamber (13) and the second filter chamber (14). The ultrasonic cleaner (30) is used to send ultrasonic waves to the solution in the first filter chamber (13) and / or the second filter chamber (14) to achieve ultrasonic cleaning of the primary filter element (21) and / or the secondary filter element (22).

2. The filter element assembly according to claim 1, characterized in that: The filter element assembly further comprises a controller, the controller being electrically connected to the ultrasonic cleaner (30), and the controller being used to control the working mode of the ultrasonic cleaner (30).

3. The filter element assembly according to claim 2, characterized in that: The working modes of the ultrasonic cleaner (30) include continuous ultrasonic transmission and intermittent ultrasonic transmission.

4. The filter element assembly according to any one of claims 1 to 3, characterized in that: Based on the communication between the ultrasonic cleaner (30) and the first filter cavity (13), the filter housing (10) is provided with a mounting hole (111), and the ultrasonic cleaner (30) is sealingly mounted to the mounting hole (111) and partially extends into the first filter cavity (13).

5. The filter element assembly according to claim 4, characterized in that: The ultrasonic cleaner (30) comprises: A generator contact end (31) is located in the first filter cavity (13); A generator mounting section (32) is fixedly connected to the generator contact end (31), and the generator mounting section (32) is sealingly mounted in the mounting hole (111) of the filter housing (10); The generator body (33) is located outside the filter housing (10) and is fixedly connected to an end of the generator mounting section (32) away from the generator contact end (31).

6. The filter element assembly according to claim 5, characterized in that: The filter housing (10) comprises: A filter bottle body (11), wherein the bottom of the filter bottle body (11) is open, and the top of the filter bottle body (11) is sealed and has the mounting hole (111); A filter bottle cover (12) is sealingly mounted on the open opening of the filter bottle body (11).

7. The filter element assembly according to claim 6, characterized in that: The filter bottle cover (12) and the filter bottle body (11) are detachably connected.

8. The filter element assembly according to claim 6, characterized in that: The outer surface of the filter bottle cover (12) is provided with a cross protrusion (121), and / or the inner surface of the filter bottle cover (12) is provided with a secondary filter element support position (122), and the secondary filter element (22) is installed on the secondary filter element support position (122).

9. The filter element assembly according to any one of claims 1 to 3, characterized in that: The filter element assembly further comprises a partition (40), wherein the partition (40) is arranged in the filter housing (10), wherein the first filter cavity (13) is formed between the outer wall of the partition (40) and the inner wall of the filter housing (10), and the inner cavity of the partition (40) forms the second filter cavity (14).

10. The filter element assembly according to claim 9, characterized in that: A plurality of support portions (41) are provided in an annular shape on the outer periphery of the partition portion (40), and the plurality of support portions (41) abut against the inner wall of the filter housing (10).

11. The filter element assembly according to claim 9, characterized in that: The primary filter element (21) is sleeved on the outer periphery of the partition (40) with a first gap (42) therebetween, and raw water can pass through the primary filter element (21) and flow along the first gap (42) to the outside of the filter housing (10).

12. The filter element assembly according to claim 11, characterized in that: The secondary filter element (22) is arranged in the inner cavity of the partition (40) with a second gap (43) therebetween, and pure water can flow into and pass through the secondary filter element (22) along the second gap (43) for filtration.

13. The filter element assembly according to claim 12, characterized in that: The filter housing (10) has a first water inlet (112) and a first water outlet (113), and the first water inlet (112) is in communication with the first filter chamber (13); The filter element assembly further comprises a waterway plate (50), wherein the waterway plate (50) is arranged in the filter housing (10) and is sealedly connected to the partition (40), and the waterway plate (50) has a first waterway (51), and the first gap (42) is connected to the first water outlet (113) through the first waterway (51), and raw water flows into the first filter cavity (13) from the first water inlet (112), and after being filtered by the primary filter element (21), flows into the first waterway (51) from the first gap (42), and flows to the first water outlet (113) through the first waterway (51).

14. The filter element assembly according to claim 13, characterized in that: The filter housing (10) has a second water inlet (114) and a second water outlet (115); the waterway plate (50) has a second waterway (52) and a third waterway (53); the second gap (43) is connected to the second water inlet (114) through the second waterway (52); and the central flow channel (222) of the secondary filter element (22) is connected to the second water outlet (115) through the third waterway (53); Pure water flows from the second water inlet (114) through the second water channel (52) and then flows into the second gap (43). After being filtered by the secondary filter element (22), the pure water flows from the central flow channel (222) of the secondary filter element (22) into the third water channel (53) and then flows to the second water outlet (115) through the third water channel (53).

15. The filter element assembly according to claim 13, characterized in that: A first installation position (54) is provided on a side of the waterway plate (50) facing the second filter chamber (14), and an end of the primary filter element (21) is sealed and plugged into the first installation position (54).

16. The filter element assembly according to claim 15, characterized in that: A second mounting position (55) is provided on one side of the waterway plate (50) facing the second filter chamber (14); the second mounting position (55) is located inside the first mounting position (54); and the end of the partition (40) is sealed and plugged into the second mounting position (55).

17. The filter element assembly according to claim 16, characterized in that: A third mounting position (56) is provided on one side of the waterway plate (50) facing the second filter chamber (14); the third mounting position (56) is located inside the second mounting position (55); and the end of the secondary filter element (22) is sealed and plugged into the third mounting position (56).

18. The filter element assembly according to claim 17, characterized in that: A first sealing member (57) is provided between the outer wall of the primary filter element (21) and the inner wall of the first installation position (54); And / or, a second sealing member (58) is provided between the outer wall of the partition (40) and the inner wall of the second mounting position (55); And / or, a third sealing member (59) is provided between the outer wall of the secondary filter element (22) and the inner wall of the third installation position (56).

19. The filter element assembly according to claim 15, characterized in that: The primary filter element (21) comprises: A first filter material (211) is sleeved on the outer periphery of the partition (40); A first upper end cover (212) is connected to one end of the top of the first filter material (211), and the first upper end cover (212) is sealed and plugged into the first installation position (54); The first lower end cover (213) is connected to one end of the bottom of the first filter material (211), and the first lower end cover (213) and the outer wall of the partition (40) are sealed.

20. The filter element assembly according to claim 16, characterized in that The secondary filter element (22) comprises: A second filter material (221) is arranged in the inner cavity of the partition (40), and the center of the second filter material (221) has a central flow channel (222) connected to the third water channel (53) of the water channel plate (50); A second upper end cover (223) is connected to one end of the top of the second filter material (221), and the second upper end cover (223) is sealed and plugged into the third installation position (56); The second lower end cover (224) is connected to one end of the bottom of the second filter material (221); the second lower end cover (224) and the inner wall of the partition (40) are sealed and matched, and the second lower end cover (224) is supported by the bottom of the filter housing (10).

21. The filter element assembly according to claim 20, characterized in that: The second filter material (221) comprises a first sub-filter material (2211) and a second sub-filter material (2212); the first sub-filter material (2211) is connected to the second upper end cover (223); the second sub-filter material (2212) is connected to the second lower end cover (224); the central flow channel (222) is opened at the center of the second sub-filter material (2212); the first sub-filter material (2211) and the central flow channel (222) are connected; pure water is filtered through the second sub-filter material (2212) and enters the central flow channel (222); and flows through the first sub-filter material (2211) and then flows into the third water channel (53); The secondary filter element (22) further comprises a third end cap (225), and the first sub-filter material (2211) and the second sub-filter material (2212) are connected via the third end cap (225).

22. The filter element assembly according to claim 21, characterized in that The outer wall of the first sub-filter material (2211) and the inner wall of the third end cap (225) are sealed together; and / or the outer wall of the second sub-filter material (2212) and the inner wall of the third end cap (225) are sealed together.

23. A water purification device, characterized in that: A filter element assembly comprising any one of claims 1 to 22.

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