Multi-filter combined household water purifier

Abstract

This invention relates to a multi-filter combination household water purifier. A notch is created on the side of the filter element mounting hole, extending the water circuit board interface to the notch. A docking interface seat is provided on the upper end of the filter element assembly, achieving exposed water circuit connection. This allows for intuitive and precise alignment, effectively preventing interface misalignment and reducing water leakage, ensuring stable operation. A movable top plate that slides up and down is located at the bottom of the device. When replacing the filter element, it can be lifted upwards to easily disassemble any stuck or adhered filter element assembly, solving the problems of difficult disassembly and assembly, easy breakage, and difficult-to-clean residue in traditional filter elements. Users can replace the filter element themselves, significantly reducing maintenance costs and improving ease of use. The filter element seat is equipped with a locking device to firmly lock the filter element assembly in the mounting hole. Combined with the external water circuit structure, this creates a double-stabilizing effect, effectively resisting water flow impact and equipment vibration, preventing filter element loosening and displacement, and ensuring continuous multi-stage filter performance and stable water quality.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, and in particular to a multi-filter combination household water purifier. Background Technology

[0002] Currently, most household water purifiers use a multi-stage filter cartridge series filtration method to improve the quality of the output water. Existing multi-filter cartridge combination water purifiers typically include a housing and a filter cartridge holder located at the top of the housing. The filter cartridge holder has multiple filter cartridge mounting holes, and each filter cartridge assembly is detachably installed into its corresponding mounting hole. While this structure makes it easier for users to replace filter cartridges to some extent, it still has the following shortcomings:

[0003] First, the existing interface connection between the filter element and the water circuit board mostly adopts a vertical insertion and removal method. Since the filter element is located inside the box after installation, the interface position is hidden. When the user removes the filter element, it is difficult to observe the interface connection status. The sealing ring is easily worn or the interface is damaged due to the deviation of the insertion and removal angle, which affects the sealing performance and service life of the water purifier.

[0004] Secondly, after long-term use, due to water pressure and the aging of the sealing ring, the filter element is prone to jamming with the mounting hole. It is difficult for users to remove the filter element by hand, especially for filter elements installed deep in the box or in a confined space, making disassembly even more inconvenient.

[0005] Third, existing water purifiers lack an effective filter cartridge ejection mechanism. Users often need to use tools to pry the filter cartridge when replacing it. This operation is not only cumbersome, but also easily damages the filter cartridge housing or the internal structure of the housing. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a multi-filter combination household water purifier that facilitates filter replacement.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A multi-filter combination household water purifier includes a housing, a filter element holder at the upper end of the housing, filter element mounting holes spaced apart at the upper end of the filter element holder, and filter element assemblies that can be detachably installed in each of the filter element mounting holes. A notch is formed on one side of the upper end of each filter element mounting hole. A water circuit board is also provided inside the housing, and a first interface group is provided on the water circuit board, extending upward to the notch. An interface seat is provided on one side of the upper end of each filter element assembly, and a second interface group that can cooperate with the first interface group is provided at the lower end of the interface seat. A locking device for locking the filter element assembly in the filter element mounting hole is also provided on the filter element holder. A bottom cover is provided at the lower end of the housing, and a through hole is provided on the bottom cover. A movable top plate is slidably disposed in the through hole, and the movable top plate can slide upward and lift the filter element assembly.

[0009] In some embodiments, a retaining ring is provided around the edge of the through hole on the bottom cover, and a plurality of vertical sliding grooves are provided on the inner sidewall of the retaining ring. A slider is slidably disposed in each of the vertical sliding grooves, and each slider is fixedly connected to the movable top plate.

[0010] In some embodiments, the bottom cover is provided with limiting grooves at intervals corresponding to the filter element assembly, and the lower end of the filter element assembly is disposed in the limiting grooves.

[0011] In some embodiments, a soft rubber pad is provided in the limiting groove.

[0012] In some embodiments, the locking device includes a mounting shell disposed on the filter element seat, with transverse plates movably disposed in the mounting shell, and limiting flanges spaced laterally on the inner sides of the two transverse plates, the limiting flanges being movable into the filter element mounting hole and pressing the filter element assembly, and a driving component being disposed in the mounting shell to drive the two transverse plates to move away from or towards each other.

[0013] In some embodiments, the drive assembly includes a rotating shaft rotatably disposed within the mounting housing, a drive gear disposed on the rotating shaft, and racks meshing with the drive gears disposed on the inner sides of both transverse plates, with the two racks spaced apart on either side of the drive gear.

[0014] In some embodiments, the upper end of the rotating shaft extends upward beyond the mounting housing and is provided with a knob.

[0015] In some embodiments, an end cap is hinged to the rear side of the upper end of the filter element holder, the end cap being able to close the upper end of the filter element holder.

[0016] In some embodiments, the knob has a straight-line structure and a limiting groove is provided at the inner end of the end cover. When the limiting flange is in the form of pressing the filter element assembly, the knob can be locked into the limiting groove when the end cover is closed.

[0017] In some embodiments, mounting brackets are provided on both the left and right sides of the housing.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This device features a notch on one side of the upper end of the filter cartridge mounting hole, extending the first interface group of the water circuit board to the notch position. Simultaneously, an interface seat with a second interface group is provided on the upper end of the filter cartridge assembly, enabling external alignment and insertion between the filter cartridge and the water circuit board. Compared to the traditional embedded docking structure, the exposed interface alignment is more intuitive, effectively avoiding misalignment and offset of the water circuit interfaces during filter cartridge installation. This significantly improves the accuracy of water circuit docking, reducing equipment leakage and seepage at the source, and ensuring the long-term stable operation of the water purifier.

[0020] 2. This device features a movable top plate that can slide up and down within the through-hole in the bottom cover of the housing. When the filter cartridge assembly reaches the end of its service life and needs replacement, the movable top plate can be slid upwards to lift the entire assembly, easily releasing the filter cartridge from its mounting hole. This solves the problems of difficult disassembly, easy breakage, and difficulty in cleaning residual impurities associated with traditional filter cartridges. Ordinary users can independently disassemble and replace the filter cartridges without the need for specialized tools or on-site service from professionals, significantly reducing the later maintenance costs of the equipment and improving ease of use.

[0021] 3. This device is equipped with a dedicated locking device on the filter cartridge holder, which can stably lock the filter cartridge assembly inside the filter cartridge mounting hole. Combined with the external water circuit connection structure, it achieves dual reliability of filter cartridge installation and water circuit sealing connection. It effectively avoids problems such as filter cartridge loosening and displacement caused by long-term use of the equipment and water flow impact, prevents water separation and insufficient filtration, and continuously ensures the filtration effect of multi-stage filter cartridges, resulting in stable output water quality. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the water purifier of the present invention.

[0023] Figure 2 This is a three-dimensional structural diagram of the end cap of the present invention when it is open.

[0024] Figure 3 This is one of the partial cross-sectional structural schematic diagrams of the present invention.

[0025] Figure 4 This is a second partial cross-sectional structural schematic diagram of the present invention.

[0026] Figure 5 For the present invention Figure 4 Enlarged diagram of point A. Detailed Implementation

[0027] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0028] like Figures 1-5 The multi-filter combination household water purifier shown includes a housing 1, a filter element seat 2 at the upper end of the housing 1, filter element mounting holes 3 spaced apart at the upper end of the filter element seat 2, and filter element assemblies 4 that can be detachably installed in each of the filter element mounting holes 3. A notch 5 is provided on one side of the upper end of the filter element mounting hole 3. A water circuit board is also provided inside the housing 1. A first interface group 7 is provided on the water circuit board, extending upward to the notch 5. An interface seat 8 is provided on one side of the upper end of the filter element assembly 4. A second interface group 9 that can cooperate with the first interface group 7 is provided at the lower end of the interface seat 8. A locking device for locking the filter element assembly 4 in the filter element mounting hole 3 is also provided on the filter element seat 2. A bottom cover 11 is provided at the lower end of the housing 1. A through hole 12 is provided on the bottom cover 11. A movable top plate 13 is slidably arranged in the through hole 12, and the movable top plate 13 can slide upward and lift the filter element assembly 4.

[0029] According to the above structure, when this multi-filter combination household water purifier is working, it relies on the coordinated operation of the housing 1, filter element holder 2, filter element assembly 4, water circuit board, locking device, and movable top plate 13 to achieve the overall functions of stable filter element installation, precise water circuit connection, reliable locking, and convenient disassembly and replacement. The specific working principle is as follows:

[0030] The equipment is mainly supported by a housing 1. A filter element holder 2 is fixedly installed on the upper part of the housing 1, serving as the core support structure for filter element installation and water circuit connection. Multiple filter element mounting holes 3 are spaced apart on the left and right sides of the upper part of the filter element holder 2, which can be used to detachably assemble multiple sets of filter element components 4. Through the multi-filter element combination structure, multi-stage filtration and purification of water can be achieved.

[0031] To achieve precise alignment and sealing between the filter element assembly 4 and the water circuit board, a notch 5 is made on one side of the upper end of the filter element mounting hole 3. The water circuit board inside the housing 1 integrates a first interface group 7, which extends upward into the notch 5 to form an exposed water circuit connection end. At the same time, an interface seat 8 is provided on one side of the upper end of the filter element assembly 4, and a second interface group 9 is integrated at the lower end of the interface seat 8. When assembling the filter element assembly 4, the filter element assembly 4 is aligned and inserted into the filter element mounting hole 3, so that the second interface group 9 and the first interface group 7 in the notch 5 are precisely inserted and matched, completing the connection between the water circuit board and the filter element assembly 4. This ensures that the raw water can smoothly enter the filter element assembly 4 to complete the filtration, and the filtered clean water is then stably output through the water circuit board.

[0032] After the filter element assembly 4 is assembled and the water circuit is connected, the locking device on the filter element seat 2 will stably lock the filter element assembly 4 inside the filter element mounting hole 3, restricting the displacement and loosening of the filter element assembly 4. This will prevent the filter element assembly 4 from shifting or falling off due to water flow impact and equipment vibration during equipment operation, and prevent problems such as misalignment of water circuit connection, water leakage, water diversion, and filtration failure, thus ensuring the stability of equipment operation and the reliability of filtration.

[0033] When the filter element assembly 4 reaches the end of its service life and needs to be disassembled and replaced, the locking device is unlocked, and the operator can operate the movable top plate 13 from the bottom of the housing 1. The through hole 12 on the bottom cover 11 provides the movable top plate 13 with room to slide up and down. The operator can manually push the movable top plate 13 to slide upward along the through hole 12 and push the filter element assembly 4 in the filter element mounting hole 3 upward. This can easily lift the filter element assembly 4, which has been stuck to the hole wall after long-term use, and release the filter element assembly 4 from the filter element mounting hole 3. The filter element assembly 4 can be disassembled without complicated operations, effectively solving the problems of jamming, breakage and residue in traditional filter element disassembly, and greatly improving the convenience of filter element replacement.

[0034] During the overall operation, multiple filter cartridges are installed, connected to water circuits, and locked independently. Disassembly and assembly do not interfere with each other, and each filter cartridge can be replaced independently. Combined with the external slotted docking structure and bottom ejection structure, it takes into account the stability of equipment operation, the effectiveness of water purification and filtration, and the convenience of later maintenance.

[0035] See Figures 3-5As shown, a retaining ring 21 is arranged around the edge of the through hole 12 of the bottom cover 11. The retaining ring 21 serves as the outer protection and guide base for the sliding movement of the movable top plate 13. Several vertical grooves 22 are evenly arranged on the inner side wall of the retaining ring 21. A slider 23 is slidably assembled inside each vertical groove 22, and all sliders 23 are fixedly connected to the movable top plate 13. When the filter element assembly 4 needs to be ejected, the movable top plate 13 moves upward under force, driving the slider 23 to slide vertically in a straight line along the vertical groove 22. Through the limiting and guiding cooperation between the groove and the slider, the horizontal offset and sway of the movable top plate 13 are restricted, so that the movable top plate 13 always maintains vertical lifting and lowering movement, ensuring uniform ejection force and avoiding situations where the filter element assembly 4 is cracked, misaligned, or stuck due to ejection deviation or tilting. This greatly improves the stability and accuracy of the filter element ejection and disassembly process.

[0036] The bottom cover 11 is provided with limiting grooves 31 at intervals corresponding to the positions of each filter element assembly 4. The lower end of the filter element assembly 4 is placed inside the limiting groove 31. The limiting groove 31 radially limits and positions the bottom of the filter element assembly 4. Together with the fixing structure of the upper filter element seat 2, it realizes bidirectional positioning constraint of the upper and lower ends of the filter element assembly 4. This effectively avoids the bottom of the filter element assembly 4 from shifting or shaking due to water flow impact and machine vibration during equipment operation. It also prevents the overall tilting of the filter element from causing water circuit connection loosening, water leakage, and filter flow deviation, thus ensuring the overall coaxiality and stability of the filter element assembly 4 installation.

[0037] A soft rubber pad is installed inside the limiting groove 31. When the lower end of the filter element assembly 4 is seated in the limiting groove 31, it fits tightly against the soft rubber pad. The soft rubber pad can buffer and dampen shocks, prevent slippage, limit movement, and provide sealing protection. On the one hand, it can buffer the impact of equipment operation vibration on the filter element assembly 4, reducing the probability of filter element wear and loosening; on the other hand, it can fill the gap between the lower end of the filter element assembly 4 and the limiting groove 31, preventing abnormal noise caused by gap shaking, while preventing dust and water stains from entering the installation gap, effectively protecting the bottom structure of the filter element, and further improving the overall quietness and structural durability of the water purifier.

[0038] See Figure 2 As shown, a mounting shell 51 is provided on the filter element holder 2, serving as the supporting mounting base for the entire locking device. Two sets of transverse plates 52 are movably mounted inside the mounting shell 51, allowing them to move closer or further apart within the shell. Limiting flanges 53 are spaced apart on the inner sides of both transverse plates 52. These flanges move synchronously with the transverse plates 52, extending into the filter element mounting hole 3 and pressing against the outer wall of the filter element assembly 4, thus achieving pressure and fixation of the filter element assembly 4.

[0039] The mounting housing 51 houses a drive assembly that provides power for the translational movement of the two transverse plates 52. The core of the drive assembly consists of a rotating shaft 61, a drive gear 62, and a rack 63. The rotating shaft 61 is rotatably mounted inside the mounting housing 51. The drive gear 62 is fixedly mounted on the outside of the rotating shaft 61. The racks 63 are fixedly mounted on the inner sides of the two transverse plates 52. The two sets of racks 63 are symmetrically spaced on both sides of the drive gear 62 and mesh with the drive gear 62 to form a symmetrical gear and rack transmission structure.

[0040] The upper end of the rotating shaft 61 extends upward through the outside of the mounting housing 51 and fixes the mounting knob 71 as the control end for manual operation. When assembling the filter element, rotating the knob 71 can drive the rotating shaft 61 and the drive gear 62 to rotate synchronously. Utilizing the gear meshing transmission principle, the rotation of the drive gear 62 can synchronously drive the racks 63 on both sides to move in opposite or opposite linear motions, thereby causing the two transverse plates 52 to move closer or further away synchronously.

[0041] When it is necessary to lock the filter element assembly 4, turn the knob 71, drive the gear 62 to move the racks 63 on both sides toward each other, so that the two horizontal plates 52 move inward and drive the inner limiting flange 53 to move into the filter element mounting hole 3 at the same time. The outer wall of the filter element assembly 4 is clamped by multiple points, and the filter element assembly 4 is firmly locked in the filter element mounting hole 3. This restricts the shaking, displacement and loosening of the filter element assembly 4, and ensures that the second interface group 9 of the upper interface seat 8 of the filter element assembly 4 and the first interface group 7 in the notch 5 are always accurately connected, avoiding water leakage and misalignment problems.

[0042] When it is necessary to disassemble and replace the filter element assembly 4, turn the knob 71 in the opposite direction. The drive gear 62 drives the racks 63 on both sides to move in opposite directions. The two transverse plates 52 separate outwards synchronously, causing the limiting flange 53 to exit the filter element mounting hole 3, releasing the pressure and locking on the filter element assembly 4. At this time, the filter element assembly 4 can be easily pushed out and removed with the help of the bottom movable top plate 13. The overall transmission structure has high synchronization, uniform locking force, simple and convenient operation, and strong locking stability, effectively improving the firmness of filter element installation and the convenience of disassembly and assembly.

[0043] See Figure 1 , Figure 2 As shown, an end cap 81 is hinged to the rear side of the upper end of the filter element holder 2. The end cap 81 can be flipped open and closed around the hinge position, which can seal the entire upper structure of the filter element holder 2. During daily use, when the end cap 81 is closed, it can completely cover the exposed structures such as the filter element mounting hole 3, the upper end of the filter element assembly 4, and the knob 71, effectively preventing external dust, moisture, and debris from entering the interior of the filter element holder 2. This avoids dust and moisture accumulation in the water interface and transmission structure, and prevents impurities from affecting the filter element docking accuracy and the transmission flexibility of the locking structure, thus providing good protection.

[0044] The knob 71 is designed with a straight-line structure, and a corresponding limiting groove 91 is provided on the inner side of the end cover 81 to form a knob locking mechanism. When the knob 71 is rotated, the limiting flange 53 is fully pressed and fixed to the filter element assembly 4, and the equipment is in a normal locked working state, the end cover 81 is flipped to close, and the straight-line knob 71 can be precisely locked into the limiting groove 91. The limiting groove 91 forms a circumferential limiting constraint on the knob 71, effectively preventing the knob 71 from becoming loose due to vibration or accidental contact during equipment use, avoiding displacement of the transverse plate 52 and loosening of the limiting flange 53, preventing the filter element assembly 4 from becoming loose or shifting, and preventing water leakage during connection, ensuring the long-term stable and reliable locking state of the filter element.

[0045] The left and right sides of the housing 1 are symmetrically equipped with mounting brackets 92, serving as the fixed installation structure for the entire unit. During assembly and use, the equipment can be aligned and fixed to walls, cabinets, or other mounting surfaces using the mounting brackets 92 on both sides, achieving wall-mounted or recessed installation of the water purifier. The dual mounting brackets 92 evenly distribute the weight of the equipment, ensuring balanced force distribution and secure fixation, effectively preventing loosening, shaking, and falling, thus improving the stability and adaptability of the overall installation and making it suitable for various home installation scenarios.

[0046] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-filter combination household water purifier, comprising a housing (1), a filter element seat (2) provided at the upper end of the housing (1), filter element mounting holes (3) provided at intervals on the left and right sides of the upper end of the filter element seat (2), and a filter element assembly (4) can be detachably installed in each of the filter element mounting holes (3), characterized in that: A notch (5) is provided on one side of the upper end of the filter element mounting hole (3). A water channel plate is also provided inside the housing (1). A first interface group (7) is provided on the water channel plate. The first interface group (7) extends upward to the notch (5). An interface seat (8) is provided on one side of the upper end of the filter element assembly (4). A second interface group (9) that can cooperate with the first interface group (7) is provided at the lower end of the interface seat (8). A locking device for locking the filter element assembly (4) in the filter element mounting hole (3) is also provided on the filter element seat (2). A bottom cover (11) is provided at the lower end of the housing (1). A through hole (12) is provided on the bottom cover (11). A movable top plate (13) is slidably provided in the through hole (12). The movable top plate (13) can slide upward and lift the filter element assembly (4).

2. The multi-filter cartridge combined household water purifier according to claim 1, characterized in that: A retaining ring (21) is provided around the edge of the through hole (12) on the bottom cover (11). Several vertical sliding grooves (22) are provided on the inner side wall of the retaining ring (21). A slider (23) is slidably provided in each vertical sliding groove (22). Each slider (23) is fixedly connected to the movable top plate (13).

3. A multi-filter combination household water purifier according to claim 1, characterized in that: The bottom cover (11) is provided with a limiting groove (31) corresponding to the filter element assembly (4) at intervals, and the lower end of the filter element assembly (4) is located in the limiting groove (31).

4. A multi-filter combination household water purifier according to claim 3, characterized in that: A soft rubber pad is provided in the limiting groove (31).

5. A multi-filter combination household water purifier according to claim 1, characterized in that: The locking device includes a mounting shell (51) disposed on the filter element seat (2). A transverse plate (52) is movably disposed in the mounting shell (51). A limiting flange (53) is provided on the inner side of the two transverse plates (52) at left and right intervals. The limiting flange (53) can move into the filter element mounting hole (3) and press the filter element assembly (4). A driving component that can drive the two transverse plates (52) to move away from or closer to each other is also provided in the mounting shell (51).

6. A multi-filter combination household water purifier according to claim 5, characterized in that: The drive assembly includes a rotating shaft (61) rotatably disposed within the mounting housing (51), a drive gear (62) is disposed on the rotating shaft (61), and racks (63) meshing with the drive gear (62) are disposed on the inner sides of both transverse plates (52), with the two racks (63) spaced apart on both sides of the drive gear (62).

7. A multi-filter combination household water purifier according to claim 6, characterized in that: The upper end of the rotating shaft (61) extends upward outside the mounting housing (51) and is provided with a knob (71).

8. A multi-filter combination household water purifier according to claim 7, characterized in that: An end cap (81) is hinged to the rear side of the upper end of the filter element seat (2), and the end cap (81) can cover the upper end of the filter element seat (2).

9. A multi-filter combination household water purifier according to claim 8, characterized in that: The knob (71) has a straight-line structure. A limiting groove (91) is provided at the inner end of the end cap (81). When the limiting flange (53) is in the form of pressing the filter element assembly (4), the knob (71) can be inserted into the limiting groove (91) when the end cap (81) is closed.

10. A multi-filter combination household water purifier according to claim 1, characterized in that: Mounting brackets (92) are provided on both the left and right sides of the housing (1).

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