Replaceable inner core of water purifying filter core
By designing a water filter cartridge with a replaceable inner core, and using a rear cover opening and a front button unlocking method, the problem of inconvenient water filter cartridge replacement is solved, achieving convenient replacement of the inner core and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-10
AI Technical Summary
Replacing all existing water purifier filter cartridges after they expire leads to resource waste and increased costs, and the replacement process is inconvenient.
A water filter cartridge with a replaceable inner core is designed. The cartridge assembly can be easily disassembled and the inner core can be conveniently replaced by a combination of opening the rear cover and unlocking the front button. The structure of the housing connecting arm, elastic buckle and torsion spring is used to ensure the convenience of operation.
It enables convenient replacement of the filter element, reduces resource waste and replacement costs, and improves operational convenience.
Smart Images
Figure CN224477948U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a water treatment device, and more particularly to a water purification filter element. Background Technology
[0002] Water purifiers are becoming increasingly widely used. Typically, a single water purifier requires multiple filter cartridges, and the water must undergo multiple layers of filtration before it becomes safe for human consumption. When a filter cartridge reaches the end of its lifespan, it is usually replaced as a whole. After it expires, the entire cartridge must be discarded, resulting in resource waste and being detrimental to the environment. The high frequency of replacement further increases the cost of the filter cartridges.
[0003] Therefore, many existing technologies have developed water purifier cartridges that only require replacement of the inner core. When the water purifier cartridge reaches the end of its lifespan, only the inner core needs to be replaced, while other components are retained, which greatly reduces costs and protects the ecological environment to a certain extent.
[0004] Relevant literature can be found in Chinese Utility Model Patent No. ZL201521092127.7, entitled "Replaceable Filter Core Structure" (Authorization Announcement No. CN205340310U); Chinese Utility Model Patent No. ZL 201921206979.2, entitled "A Replaceable Filter Core Structure" (Authorization Announcement No. CN210993231U); and Chinese Utility Model Patent No. ZLCN202123177243.7, entitled "A Replaceable Filter Core Structure" (Authorization Announcement No. CN 216367004U). Utility Model Content
[0005] The first technical problem to be solved by this utility model is to provide a water filter element with a replaceable inner core, in view of the above-mentioned technical status quo.
[0006] The second technical problem to be solved by this utility model is to provide a water filter element with convenient inner core replacement operation in view of the above-mentioned technical status.
[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a water purification filter element with a replaceable inner core, comprising...
[0008] The shell is hollow axially.
[0009] A front cover is provided in a sealed manner at the front port of the aforementioned housing;
[0010] The rear end cover is sealed at the rear port of the aforementioned housing;
[0011] The filter element assembly is located within the aforementioned housing.
[0012] Its features
[0013] A connecting arm is rotatably provided on the inner side of the upper end of the housing, and the top inner side of the connecting arm has a protrusion;
[0014] The filter assembly includes
[0015] The filter cartridge housing has an inner cavity and an opening at the rear end;
[0016] The rear cover is detachable and located at the rear end of the aforementioned filter element housing, and is sealed.
[0017] The front cover is located at the bottom of the inner cavity of the aforementioned filter element housing; and
[0018] The inner core is located inside the aforementioned filter housing and its bottom is adapted to the front cover;
[0019] The inner side of the rear end cover extends downward to form a connecting part. The outer end face of the connecting part has a circulating track groove that cooperates with and guides the aforementioned protrusion. The circulating track groove has a high positioning point for positioning the protrusion and a low notch for the protrusion to disengage from the track. A compression elastic element is provided between the inner side of the rear end cover and the rear cover.
[0020] The lower inner side of the housing is provided with an elastic buckle that can lock the filter element housing. The front cover is provided with a button that can be linked with the elastic buckle. When the button is pressed, it can cause the aforementioned elastic buckle to disengage from the filter element housing.
[0021] Furthermore, the connecting arm is provided with a torsion spring, which always forces the connecting arm to remain in a vertical position.
[0022] Furthermore, there are two connecting arms symmetrically arranged on both sides of the filter element housing, and correspondingly, there are also two protrusions, each of which has a circulation track groove.
[0023] Preferably, the elastic buckle includes a locking element and a first spring. The locking element is laterally movable on the rear end cover and has a hook at the front end that engages with the filter cartridge housing, and the rear end abuts against the first spring. When the button is pressed, it acts on the locking element and forces the locking element to move laterally outward. The inner side of the button is also provided with a second spring that can reset the button.
[0024] Furthermore, the bottom of the card has a first inclined surface, and the inner side of the button has a second inclined surface that contacts and engages with the aforementioned first inclined surface.
[0025] Preferably, the cyclic trajectory groove is heart-shaped.
[0026] Furthermore, the bottom of the filter cartridge housing has a raw water inlet port, a purified water outlet port, and a wastewater port. Correspondingly, the button has a first channel, a second channel, and a third channel through which the raw water inlet port, the purified water outlet port, and the wastewater port pass.
[0027] Compared with the prior art, the advantages of this utility model are: the rear end of the filter element assembly is opened by installing the rear end cover, and the front end is unlocked by pressing the button. The entire filter element assembly can be easily removed. After the filter element assembly is removed, the inner core can be replaced by opening the rear cover. The overall operation is easy to implement and convenient and quick. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the external structure of an embodiment.
[0029] Figure 2 for Figure 1 Exploded assembly diagram.
[0030] Figure 3 for Figure 2 Enlarged view of the card component.
[0031] Figure 4 This is a schematic diagram of the appearance structure from another perspective of the embodiment.
[0032] Figure 5 This is an enlarged cross-sectional view of an example.
[0033] Figure 6 This is an enlarged cross-sectional view from another perspective of the embodiment. Detailed Implementation
[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0035] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the water purification filter element in this embodiment includes a housing 1, a front end cover 3, a rear end cover 2, and a filter element assembly. The housing 1 is axially hollow. The front end cover 3 is sealed at the front port of the housing 1. The rear end cover 2 is sealed at the rear port of the housing 1. The filter element assembly is disposed inside the housing 1. A connecting arm 8 is rotatably provided on the inner side of the upper end of the housing (1). Specifically, the connecting arm 8 is rotatably connected by bolts 83. The inner side of the top of the connecting arm 8 has a protrusion 81.
[0036] In this embodiment, the filter element assembly includes a filter element housing 9, a rear cover 4, a front cover 6, and an inner core 5. The filter element housing 9 has an opening at the rear end of its inner cavity. Figure 4 As shown, the bottom of the filter cartridge housing 9 has a raw water inlet port 9a, a purified water outlet port 9b, and a wastewater outlet port 9c; the rear cover 4 is detachably located at the rear end of the filter cartridge housing 9 and is sealed. Specifically, the rear cover 4 and the filter cartridge housing 9 are connected by threads to achieve detachment; the front cover 6 is located at the bottom of the inner cavity of the filter cartridge housing 9; the inner core 5 is located in the inner cavity of the filter cartridge housing 9 and its bottom is adapted to the front cover 6.
[0037] A connecting portion 21 extends downward from the inner side of the rear cover 2. The outer end face of the connecting portion 21 has a circulating track groove 22 that cooperates with and guides the protrusion 81. In this embodiment, the circulating track groove 22 is heart-shaped. The circulating track groove 22 has a high positioning point 23 for positioning the protrusion 81 and a low notch 24 for disengaging the protrusion 81 from the track groove 22. A compression elastic member 41 is provided between the inner side of the rear cover 2 and the rear cover 4. In this embodiment, the elastic member 41 is two spaced compression springs.
[0038] Combination Figure 3 As shown, the lower inner side of the housing 1, near the front cover 3, is provided with an elastic buckle that can lock the filter element housing 9. In this embodiment, there are two sets of elastic buckles, symmetrically arranged on the left and right. Each set of elastic buckles includes a locking element 7 and a first spring 7a. The locking element 7 is laterally movable on the rear cover 2 and has a hook 71 at its front end that engages with the lug 91 of the filter element housing 9, and its rear end abuts against the first spring 7a. Considering the setting of the first spring 7a, a hole is made in the housing 1, and a plug 7b is provided on the hole. The inner side of the plug 7b abuts against the first spring. The bottom of the front end of the locking element 7 has a first inclined surface 72.
[0039] The front cover 3 is equipped with a button 31 that can be linked with a spring-loaded latch. The button 31 has a first channel, a second channel, and a third channel through which the raw water inlet port 9a, the purified water outlet port 9b, and the wastewater port 9c pass. A second spring 32 is also provided inside the button 31 to reset it. The inner side of the button 31 has a second inclined surface 311 that contacts and engages with the first inclined surface 72.
[0040] When button 31 is pressed, the second inclined surface 311 acts on the first inclined surface 72, forcing the clip 7 to move laterally outward, and thus the clip hook 71 of the clip 7 disengages from the lug 91 of the filter housing 9.
[0041] In this embodiment, the button 31 is attached to the front cover 3 by a welding plate 33 on the outside, which restricts the button 31 from detaching from the front cover 3.
[0042] Two connecting arms 8 are symmetrically arranged on both sides of the housing 1. Correspondingly, there are also two protrusions 81, each of which has a circulation track groove 22. Each connecting arm 8 is provided with a torsion spring 82, which always forces the connecting arm 8 to remain in a vertical state.
[0043] In the initial state, the protrusion 81 of the connecting arm is positioned at the high point 23 of the circulation track groove. When disassembling the inner core, pressing down the rear end cover 2 causes the connecting arm to rotate, disengaging the protrusion 81 from the high point 23 and returning clockwise along the circulation track groove to the low point 24. This disengages the connecting arm from the circulation track groove, and the rear end cover 2 pops out under the action of the elastic element 41, creating an open port at the rear end of the housing. Simultaneously, the connecting arm returns to its vertical position under the action of the torsion spring. Next, pressing the button disengages the clip from the filter housing, releasing the lock on the lower end of the filter housing, allowing the entire filter assembly to be pulled out from the rear end. Unscrewing the rear cover removes the inner core and front cover, separating the inner core from the front cover, thus disassembling the inner core that has reached the end of its service life.
[0044] When installing the inner core, press the brand-new inner core into the front cover, and then press the entire assembly into the filter cartridge housing to hold it in place; rotate the rear cover to lock it in place, and the filter cartridge assembly is complete; press the assembled filter cartridge assembly into the housing and press it down, and the lugs of the filter cartridge housing engage with the hooks of the clips to lock it in place. At the same time, the raw water inlet port 9a, the purified water outlet port 9b, and the wastewater port 9c of the filter cartridge housing are adapted to the first, second, and third channels of the button; then press the rear cover, and the protrusion of the connecting arm enters the lower fixed point of the circulation track groove and rotates clockwise to the higher fixed point of the circulation track groove. After releasing, the rear cover is positioned, and the filter cartridge assembly is locked.
[0045] The filter cartridge assembly can be opened by installing the rear cover, and unlocked by pressing the button at the front. The entire filter cartridge assembly can be easily removed. After removal, the inner core can be replaced by opening the rear cover. The overall operation is easy to perform and convenient and quick.
Claims
1. A water filter cartridge with a replaceable inner core, comprising: Shell (1), axially hollow; A front cover (3) is sealed at the front port of the aforementioned housing (1); The rear end cover (2) is sealed at the rear port of the aforementioned housing (1); The filter element assembly is disposed within the aforementioned housing (1). Its features The upper inner side of the housing (1) is provided with a connecting arm (8), and the top inner side of the connecting arm (8) has a protrusion (81); The filter assembly includes The filter housing (9) has an inner cavity and a rear end opening; The rear cover (4) is detachable and located at the rear end of the aforementioned filter element housing (9) and is sealed. The front cover (6) is located at the bottom of the inner cavity of the aforementioned filter housing (9); and The inner core (5) is located in the inner cavity of the aforementioned filter housing (9) and its bottom is adapted to the front cover (6); The inner side of the rear cover (2) extends downward with a connecting part (21). The outer end face of the connecting part (21) has a circulation track groove (22) that cooperates with and guides the aforementioned protrusion (81). The circulation track groove has a high positioning point (23) for positioning the protrusion (81) and a low notch (24) for the protrusion (81) to disengage from the track. A compression elastic element (41) is provided between the inner side of the rear cover (2) and the rear cover (4). The lower inner side of the housing (1) near the front cover (3) is provided with an elastic buckle that can lock the filter element housing (9). The front cover (3) is provided with a button (31) that can be linked with the elastic buckle. When the button (31) is pressed, it can cause the aforementioned elastic buckle to disengage from the filter element housing (9).
2. The water filter cartridge with replaceable inner core according to claim 1, characterized in that... The connecting arm (8) is provided with a torsion spring (82), which always forces the connecting arm (8) to remain in a vertical state.
3. The water filter cartridge with replaceable inner core according to claim 1, characterized in that... The connecting arms (8) are two in number and are symmetrically arranged on both sides of the filter housing (9). Correspondingly, there are also two protrusions (81), each of which has a circulation track groove (22).
4. The water filter cartridge with replaceable inner core according to claim 1, characterized in that... The elastic buckle includes a clip (7) and a first spring (7a). The clip (7) is laterally movable on the rear end cover (2) and has a hook (71) at the front end that engages with the filter housing (9). The rear end abuts against the first spring (7a). When the button (31) is pressed, it can act on the card (7) and force the card (7) to move laterally outward. The inner side of the button (31) is also provided with a second spring (32) that can reset the button (31).
5. The water filter cartridge with replaceable inner core according to claim 4, characterized in that... The bottom of the card has a first inclined surface, and the inner side of the button has a second inclined surface that contacts and engages with the aforementioned first inclined surface.
6. The water filter cartridge with replaceable inner core according to claim 1, characterized in that... The aforementioned cyclic trajectory groove (22) is heart-shaped.
7. The water filter cartridge with replaceable inner core according to claim 1, characterized in that... The bottom of the filter cartridge housing (9) has a raw water inlet port (9a), a purified water outlet port (9b) and a wastewater port (9c). Correspondingly, the button (31) has a first channel, a second channel and a third channel through which the raw water inlet port (9a), the purified water outlet port (9b) and the wastewater port (9c) pass.