Water purifier with mineralized filter element

Abstract

The application provides a water purifier with a mineralization filter element, and relates to the technical field of water purification. The water purifier comprises a first shell, an annular lining, a composite filter element, a second shell, a drainage pipe, an inner pipe fitting and a joint fitting. The application sets the second shell as a containing space downstream of the composite filter element, and sets an overflow hole at the bottom of the first shell, so that the remaining water in the pores of each layer of the composite filter element slowly flows into the second shell under the action of gravity and is physically separated from the mineralization layer when the water supply is stopped. When water is taken, the variable diameter section at the corresponding position of the inner pipe fitting and the end of the drainage pipe generates a Venturi negative pressure, the remaining mineralized liquid in the second shell is sucked into the main stream, and the new mineralized water is mixed and then output. The application has the advantages of automatic compensation, no control delay and no additional water consumption, and has significant progress.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically to a water purifier with a mineralized filter element. Background Technology

[0002] With rising living standards and increased health awareness, the penetration rate of household water purifiers is increasing year by year. Reverse osmosis water purifiers effectively remove impurities, heavy metals, and bacteria from water; however, while producing purified water, beneficial minerals such as strontium, metasilicic acid, calcium, and magnesium are also removed. Long-term consumption of purified water is not conducive to human health. Therefore, adding a mineralizing filter after the water purifier to replenish the purified water with appropriate amounts of minerals has become an industry trend.

[0003] Currently, mineralization water purification technology has developed along several paths: One is the material modification route, which controls the mineral dissolution rate by adjusting the ratio of mineralizing materials or adding an inhibition layer to the outer layer of the mineralization filter element. For example, Gree Electric Appliances uses silicate mineral powder to inhibit the dissolution of strontium ions, reducing the release rate during settling. The second is the multi-channel parallel regulation route, which sets up mineralization water channels and bypass dilution water channels. When the mineral concentration in the water stored in the mineralization filter element is determined to be excessive, the water replenishment branch is controlled to dilute the retained high-mineralization water. The methods include: 1) concentration-mineralized water, which can be controlled by inhibiting or promoting mineral release through inhibitory and promoting substances, respectively, to achieve adjustable control of the mineral content in the effluent; 2) differential pressure distribution route, which adjusts the flow resistance of the main stream through a packing bed and uses the differential pressure generated between the main stream and the distribution flow to draw the salt solution into the main stream in proportion, thus achieving proportional distribution of mineralization to the main stream flow rate; and 3) integrated composite filter element route, which coaxially integrates pre-activated carbon, mineralizing materials, and post-activated carbon into the same housing, achieving miniaturization and integrated filtration and mineralization.

[0004] Existing technologies all adopt passive treatment methods for the "retained water" inside composite filter elements, such as suppression, dilution, or isolation, and there is no technical solution that regards it as a resource and actively utilizes it. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a water purifier with a mineralization filter element, which solves the problems of excessive mineralization of the first cup of water and poor flow adaptability caused by static over-dissolution during intermittent water intake in existing mineralization filter elements.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A water purifier with a mineralizing filter element includes: A first housing, wherein a water inlet is provided on the side and near the top of the first housing, and a water outlet is provided at the top of the first housing; An annular liner is coaxially disposed inside the first housing. A first region is formed between the outer side of the annular liner and the inner side of the first housing, and a second region is formed inside the annular liner. A flow channel connecting the first region and the second region is provided at the bottom of the annular liner. A composite filter element is installed in the first region, and a support tube is fixedly connected to the inner bottom of the first housing below the second region. The bottom end of the support tube is open. The second housing is fixedly connected to the bottom of the first housing. An overflow hole communicating with the interior of the second housing is provided on the inner bottom of the first housing below the second region. The overflow hole is used to guide the liquid in the second region to slowly flow into the second housing. A drainage tube, the first end of which is connected to the top of a support tube, and the second end of which extends into the interior of the second housing; The inner pipe is fixedly connected to the inner top of the first shell and is sleeved on the outside of the top of the support pipe. The bottom end of the inner pipe, located outside the support pipe, forms the main channel. The inner pipe is set as a variable diameter section corresponding to the end of the drainage pipe. When water is drawn, the first end of the drainage pipe generates a Venturi negative pressure, which draws the water stored in the second shell into the inner pipe and mixes it with the main channel. A connector is fixedly connected to the top end of the inner tube and clamps and fixes the inner tube and the connector to both ends of the upper cover of the first housing.

[0007] Preferably, the composite filter element comprises: The filter housing is annular. The pre-activated carbon, mineralization layer and post-activated carbon are arranged inside the filter housing and distributed from top to bottom in sequence. A partition is provided between the pre-activated carbon and the mineralization layer, and between the mineralization layer and the post-activated carbon. The partition has a first water-permeable hole.

[0008] Preferably, the first housing includes: The main body has a support pipe fixedly connected to the center of its inner bottom. An overflow hole is opened at the bottom of the main body and located on the outside of the support pipe. An expansion section is connected to the top of the main body. The water inlet is connected to the outside of the expansion section, and a pressure valve assembly is installed inside the water inlet. The upper cover is fixedly installed on the top of the expanded diameter section, and the top of the upper cover is provided with a central hole.

[0009] Preferably, the bottom of the upper cover is provided with an auxiliary frame, a pressing member is provided below the end of the auxiliary frame, and an annular piece is provided below the auxiliary frame, the annular piece corresponding to the top of the annular inner liner.

[0010] Preferably, the drainage tube comprises: A flexible hose fitting, one end of which is fixedly connected to a tapered member. The end of the tapered member away from the flexible hose fitting is folded outward to form a fastening part, which corresponds to the top end of the support tube.

[0011] Preferably, the annular liner comprises: The ring-shaped body has several circumferentially distributed positioning fins fixedly connected to its bottom end.

[0012] Preferably, the inner tube includes: The large-diameter section, variable-diameter section, and small-diameter section are designed as a single unit from bottom to top.

[0013] Preferably, the outer sides of the large-diameter section, the variable-diameter section, and the small-diameter section are provided with space-occupying structures.

[0014] Preferably, a one-way valve is provided on the inner side of the small-diameter section.

[0015] Preferably, the second housing has a vent on its side wall and near the top that communicates with the atmosphere.

[0016] This invention provides a water purifier with a mineralization filter element. It has the following beneficial effects: This invention provides a second housing downstream of the composite filter element as a containment space, and an overflow hole is opened at the bottom of the first housing. This allows the water remaining in the pores of each layer of the composite filter element to slowly flow into the second housing under the action of gravity when the water supply is interrupted, and to physically separate from the mineralized layer. During water intake, a venturi negative pressure is generated at the variable diameter section corresponding to the end of the inner pipe fitting and the drain pipe, drawing the residual mineralized liquid in the second shell into the mainstream, mixing it with the new mineralized water, and then outputting it. Understandably, the second shell's capacity allows for the storage of "residual water," achieving physical separation between the water and the mineralized layer, offering advantages in safety, stability, and reliability. In the initial stages of water intake, when the water flow is slow, the venturi negative pressure generated at the variable diameter section corresponding to the end of the inner pipe fitting and the drain pipe is small, resulting in less residual mineralized liquid being drawn from the second shell. At this time, the proportion of new mineralized water in the mainstream is high, avoiding excessively high mineralization in the first cup of water due to static over-dissolution. As the water intake flow rate increases and the flow speed accelerates, the venturi negative pressure increases accordingly, gradually increasing the amount of residual mineralized liquid drawn from the second shell, automatically compensating for the shortcomings of short contact time between the water flow and the mineralized layer and insufficient mineral dissolution under high flow rates. Therefore, this invention achieves a flow-adaptive mineralization mechanism of "less pumping at low flow rates and more pumping at high flow rates," ensuring stable effluent mineralization across the entire flow range. This offers advantages such as automatic compensation, no control delay, and no additional water consumption, representing a significant advancement. Attached Figure Description

[0017] Figure 1 This is a perspective view of a water purifier with a mineralized filter element proposed in this invention; Figure 2This is a front view of a water purifier with a mineralization filter element proposed in this invention; Figure 3 This is a cross-sectional view of a water purifier with a mineralization filter element proposed in this invention; Figure 4 This is an exploded view of a water purifier with a mineralized filter element proposed in this invention; Figure 5 This is a schematic diagram showing the fit between the first housing and the drain pipe of a water purifier with a mineralized filter element proposed in this invention. Figure 6 This is a perspective view of the drain pipe of a water purifier with a mineralized filter element proposed in this invention; Figure 7 This is a schematic diagram of a composite filter element for a water purifier with a mineralized filter element proposed in this invention.

[0018] The components include: 1. First shell; 2. Second shell; 3. Composite filter element; 4. Annular liner; 5. Drainage pipe; 6. Connector; 7. One-way valve; 8. Auxiliary frame; 9. Inner pipe; 10. Annular plate; 101. Main body; 102. Expanded diameter section; 103. Water inlet; 105. Overflow hole; 106. Connecting part; 107. Pressure valve assembly; 108. Top cover; 109. Support pipe; 301. Pre-activated carbon; 302. Mineralization layer; 303. Post-activated carbon; 304. Spacing plate; 401. Annular body; 402. Positioning fins; 501. Flexible hose; 502. Conical part; 503. Fastening part; 901. Large diameter section; 902. Variable diameter section; 903. Small diameter section. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] like Figures 1-7 As shown, this embodiment of the invention provides a water purifier with a mineralized filter element, which is used at the back end of a household water purifier (installed at the water outlet) to supplement the pure water with an appropriate amount of minerals, especially suitable for intermittent water intake application scenarios; specifically including: a first shell 1, an annular inner liner 4, a composite filter element 3, a second shell 2, a drain pipe 5, an inner pipe 9, and a connector 6.

[0021] A water inlet 103 is provided on the side and near the top of the first housing 1, and a water source pipe is connected to the water inlet 103. When the control valve in the water source pipe is opened, water (purified water after reverse osmosis filtration and other purification treatments) is supplied to the water inlet 103 and then to the inside of the first housing 1. When the control valve in the water source pipe is closed, the water supply to the first housing 1 is stopped. A water outlet is provided at the top of the first housing 1 for discharging mineralized water, which can be directly connected to a water pipe. An annular liner 4 is coaxially arranged inside the first housing 1, and a first region is formed between the outer side of the annular liner 4 and the inner side of the first housing 1, and a second region is formed inside the annular liner 4. It can be seen that the first region is an annular region, and the second region is an annular region. The area is circular, and the first area is directly corresponding to the water inlet 103. Water from the external water source pipe enters the first area directly through the water inlet 103. A composite filter element 3 is installed in the first area. The composite filter element 3 is ring-shaped and designed with a multi-layer structure along the water flow direction in the first area. A flow channel connecting the first area and the second area is provided at the bottom of the annular liner 4. After the water is mineralized and further treated by the composite filter element 3 in the first area, it enters the second area through the flow channel. A support pipe 109 is fixedly connected to the bottom of the first shell 1 below the second area. The bottom end of the support pipe 109 is open. The second shell 2 is fixedly connected to the bottom of the first shell 1. The bottom inner part of the first housing 1 corresponding to the second housing 2 has an overflow hole 105 that communicates with the interior of the second housing 2. The overflow hole 105 is used to guide the liquid in the second area to slowly flow into the second housing 2. The overflow hole 105 is generally designed with multiple micropores. It has the ability to slowly flow the liquid in the second area into the second housing 2 throughout the process, but its flow rate is small and its role can be ignored in the water intake process. When there is a long period of stagnation (compared to the time of the water intake process), it plays a role in slowly flowing the water stored in the pores of each layer of the composite filter into the second housing 2 under the action of gravity, so that the stored water is physically separated from the mineralized layer. It has the technical advantages of safety, stability and reliability. The first end of the drainage pipe 5 is connected to the top of the support pipe 109. The second end of the drainage pipe 5 extends into the interior of the second housing 2. Generally, the second end of the drainage pipe 5 is located at the bottom of the second housing 2, which can completely draw in the water stored inside the second housing 2 and mix it with the mainstream. The inner pipe fitting 9 is fixedly connected to the top of the first housing 1, and the inner pipe fitting 9 is sleeved on the outside of the top of the support pipe 109. The bottom end of the inner pipe fitting 9 and the outside of the support pipe 109 form the mainstream channel. The inner pipe fitting 9 and the end of the drainage pipe 5 are set as a variable diameter section 902. When water is drawn, a Venturi negative pressure is generated at the first end of the drainage pipe 5, which draws in the water stored in the second housing 2 into the inner pipe fitting 9 and mixes it with the mainstream. It can be understood that the Venturi negative pressure is based on the flow velocity of the mainstream in the inner pipe fitting 9. The greater the flow velocity, the greater the suction force.The connector 6 is fixedly connected to the top end of the inner pipe 9, and the inner pipe 9 and connector 6 are clamped and fixed to both ends of the upper cover 108 of the first housing 1; for example, the top end of the inner pipe 9 passes through the top of the first housing 1, and then the connector 6 is threadedly installed, with the connector 6 serving as the water outlet.

[0022] It is understandable that the water inlet 103 is connected to an external water source pipeline. When the control valve in the water source pipeline is opened, water is supplied to the water inlet 103, and then to the interior of the first housing 1. The water flows downward along the first area, undergoes mineralization treatment through the composite filter element 3, and then flows through the flow channel at the bottom of the annular liner 4, allowing the mineralized water to enter the second area. From the second area, the water flows upward through the main flow channel at the bottom of the inner pipe fitting 9, enters the interior of the inner pipe fitting 9, flows upward, and finally exits from the top of the inner pipe fitting 9 and the connector 6. During the upward flow of water from the inner pipe fitting 9, because the inner pipe fitting 9 and the end of the drain pipe 5 are respectively set as a reducing section 902, it will... The first end of the drainage pipe 5 generates a Venturi negative pressure, drawing the residual water inside the second shell 2 into the inner pipe 9, where it mixes with the mainstream flow. The Venturi negative pressure is based on the flow velocity of the mainstream flow in the inner pipe 9; the higher the flow velocity, the greater the suction force. The residual water inside the second shell 2 is then discharged through the drainage pipe 5, mixed with the mainstream flow inside the inner pipe 9. When the user does not need to draw water, the residual water in the pores of each layer of the composite filter element 3 still flows into the second region through the flow channel at the bottom of the annular liner 4 under gravity. Then, the water in the second region slowly flows into the second shell 2 through the overflow hole, physically separating from the mineralized layer. This achieves physical separation of water and the mineralized layer, providing a safe, stable, and reliable technical advantage. Furthermore, the separated mineralized water remains inside the second shell 2 for use during the next water draw.

[0023] In one embodiment, the composite filter element 3 includes: a filter housing, a pre-activated carbon 301 disposed inside the filter housing and distributed from top to bottom, a mineralization layer 302, and a post-activated carbon 303.

[0024] The filter housing is annular, forming an annular internal space. Inside, from top to bottom, are arranged pre-activated carbon 301, a mineralization layer 302, and post-activated carbon 303. Separators 304 are provided between the pre-activated carbon 301 and the mineralization layer 302, and between the mineralization layer 302 and the post-activated carbon 303. Each separator 304 has a first water-permeable hole. The separator 304 (located between the pre-activated carbon 301 and the mineralization layer 302) isolates the pre-activated carbon 301 from the mineralization layer 302, preventing contact contamination between them. Similarly, the separator 304 (located between the mineralization layer 302 and the post-activated carbon 303) isolates the mineralization layer 302 from the post-activated carbon 303, preventing contact contamination between them.

[0025] Understandably, the pre-activated carbon 301 provides a "clean" influent environment for the mineralization layer 302, ensuring stable mineralization; the mineralization layer 302 precisely replenishes beneficial minerals into the water; and the post-activated carbon 303 provides "safety insurance" for the mineralized water, removing potential harmful impurities. Specifically, residual chlorine from the preceding water treatment process may directly corrode the mineralization materials, so the pre-activated carbon 301 is used to adsorb residual chlorine; the post-activated carbon, placed after the mineralization layer, is used to remove heavy metals released during the mineralization process. Furthermore, the vertically stacked structure, combined with the overflow hole 105 at the bottom, ensures that when water supply is interrupted, the residual water in the pores of each layer naturally flows downwards under gravity and slowly flows into the second shell 2 through the overflow hole 105, avoiding static over-dissolution. When water is drawn in, the Venturi negative pressure draws the residual mineralized liquid in the second shell 2 back to the inner pipe 9, mixing it with the mains flow, thus achieving the recycling of minerals. Thus, the pre-activated carbon 301, the mineralization layer 302, and the post-activated carbon 303 form a three-in-one functional chain of "protection-mineralization-purification" in this invention. Together with the Venturi self-absorption and water reuse mechanism, it achieves a comprehensive technical effect of stable water mineralization, no exceedance of standards in the first cup of water, and safe and reliable drinking water.

[0026] In one embodiment, the first housing 1 includes: a main body 101, a support tube 109, and an upper cover 108.

[0027] A support tube 109 is fixedly connected to the center of the inner bottom of the main body 101. An opening is made at the bottom of the main body 101 corresponding to the position of the support tube 109. An overflow hole 105 is opened at the bottom of the main body 101 and located outside the support tube 109. Multiple overflow holes 105 can be provided, arranged in a ring array. For example, the diameter of the overflow hole 105 is 0.8mm-1.5mm; too small a diameter may cause flow interruption. An expansion section 102 is connected to the top of the main body 101, meaning the inner diameter of the expansion section 102 is larger than the inner diameter of the main body 101. When the composite filter element 3 is installed inside the main body 101 and the expansion section 102, a ring is formed between the inner side of the expansion section 102 and the outer side of the composite filter element 3. The water inlet 103 is connected to the outside of the expansion section 102, and a pressure valve assembly 107 is provided inside the water inlet 103. The water entering from the water inlet 103 first enters the annular diversion area, and then enters from the circumference and top of the composite filter element 3, making the water flow more stable. Moreover, based on the pressure valve assembly 107, the water can be quickly cut off when the water supply is interrupted (for closing the valve body at the water supply end), preventing water in the water source pipeline from continuing to enter the first housing 1. The top cover 108 is fixedly installed on the top of the expansion section 102, and the top of the top cover 108 is provided with a central hole, which is used for the installation of the inner pipe 9 and the connector 6. The connection can be designed with the necessary sealing structure.

[0028] It can be understood that the bottom end of the main body 101 is provided with a connecting part 106, the second housing 2 is threadedly connected to the connecting part 106, and the top of the second housing 2 completely covers the overflow hole 105 and the bottom port of the support pipe 109; the second housing 2 is designed as a detachable structure, so that when the user has not used water for a long period of time (more than a week), the second housing 2 can be removed to drain some of the water that may be contaminated.

[0029] In one embodiment, an auxiliary frame 8 is provided at the bottom of the upper cover 108, a pressing member is provided below the end of the auxiliary frame 8, and an annular piece 10 is provided below the auxiliary frame 8, with the annular piece 10 corresponding to the top of the annular inner liner 4.

[0030] It is understandable that the top cover 108 and the top of the expansion section 102 are connected by a threaded connection. After the top cover 108 is connected, it is pressed down on the auxiliary frame 8, and then the annular plate 10 is pressed down. The annular plate 10 stabilizes the position of the composite filter element 3.

[0031] In one embodiment, the drainage tube 5 includes: a flexible tube 501, one end of which is fixedly connected to a tapered member 502, and the end of the tapered member 502 away from the flexible tube 501 is folded outward to form a fastening part 503, which corresponds to the top end of the support tube 109.

[0032] like Figure 3 , Figure 5 As shown, the fastening part 503 fastens to the top of the support tube 109, so that the top (large diameter end) of the tapered part 502 faces upward, and the bottom end of the tube 501 is located at the inner bottom of the second housing 2.

[0033] In one embodiment, the annular liner 4 includes an annular body 401, the bottom end of which is fixedly connected with a plurality of circumferentially distributed positioning fins 402.

[0034] The outer diameter of the positioning fin 402 matches the inner diameter of the main body 101; when the annular inner liner 4 is installed inside the main body 101, the positioning function of the positioning fin 402 allows the annular body 401 to be coaxial with the main body 101; and the positioning fin 402 is a radial support plate with a gap between two adjacent support plates, which can form a flow channel connecting the first region and the second region.

[0035] In one embodiment, the inner tube 9 includes a large-diameter section 901, a variable-diameter section 902, and a small-diameter section 903 integrally formed from bottom to top.

[0036] The large-diameter section 901 is fitted on the outside of the support pipe 109, the variable-diameter section 902 corresponds to the top end of the support pipe 109, and the small-diameter section 903 is located above the support pipe 109. Thus, when water enters from the bottom of the large-diameter section 901, the water flow rate increases after passing through the variable-diameter section 902 and the support pipe 109, thereby creating a negative pressure at the top of the support pipe 109, which draws in the mineralized water inside the second shell 2 through the drainage pipe 5.

[0037] In one embodiment, a space-occupying structure is provided on the outer side of the large-diameter section 901, the variable-diameter section 902, and the small-diameter section 903; the space-occupying structure can be a solid or hollow structure, used to occupy the space on the outer side of the large-diameter section 901, the variable-diameter section 902, and the small-diameter section 903, to reduce the space for water storage inside the second region; ensuring that the second shell 2 can hold the water stored inside the second region and in the gaps of the composite filter element 3.

[0038] In one embodiment, a one-way valve 7 is provided on the inner side of the small diameter section 903, that is, water can be output upward through the small diameter section 903 to prevent water in the area above the small diameter section 903 from flowing back into the interior of the first housing 1.

[0039] In one embodiment, the second housing 2 has a vent hole on its side wall and near the top that communicates with the atmosphere. The vent hole has a diameter of 0.2mm-0.3mm and multiple vent holes can be designed to prevent negative pressure from being generated inside the second housing 2, which would affect the extraction of mineralized water inside.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water purifier with a mineralization filter element, characterized in that, include: A first housing (1) is provided with a water inlet (103) on its side and near its top, and a water outlet is provided at the top of the first housing (1). An annular liner (4) is coaxially disposed on the inner side of the first housing (1). A first region is formed between the outer side of the annular liner (4) and the inner side of the first housing (1), and a second region is formed on the inner side of the annular liner (4). A flow channel connecting the first region and the second region is provided at the bottom of the annular liner (4). A composite filter element (3) is installed in the first region. A support tube (109) is fixedly connected to the inner bottom of the first housing (1) below the second region. The bottom end of the support tube (109) is open. The second housing (2) is fixedly connected to the bottom of the first housing (1). An overflow hole (105) communicating with the interior of the second housing (2) is provided in the inner bottom of the first housing (1) below the second region. The overflow hole (105) is used to guide the liquid in the second region to slowly flow into the second housing (2). A drainage tube (5) has its first end connected to the top of a support tube (109) and its second end extending into the interior of the second housing (2). The inner pipe (9) is fixedly connected to the inner top of the first housing (1) and is sleeved on the outside of the top of the support pipe (109). The bottom end of the inner pipe (9) and the outside of the support pipe (109) form the main channel. The inner pipe (9) and the end of the drain pipe (5) are set as a variable diameter section (902). When water is taken out, the first end of the drain pipe (5) generates a Venturi negative pressure, which draws the water stored in the second housing (2) into the inner pipe (9) and mixes it with the main channel. The connector (6) is fixedly connected to the top end of the inner tube (9) and the inner tube (9) and the connector (6) are clamped and fixed at both ends of the upper cover (108) of the first housing (1); The second housing (2) has a vent on its side wall and near the top that communicates with the atmosphere.

2. A water purifier with a mineralization filter element according to claim 1, characterized in that, The composite filter element (3) includes: The filter housing is annular. Pre-activated carbon (301), mineralization layer (302) and post-activated carbon (303) are arranged inside the filter housing and distributed from top to bottom. A partition (304) is provided between the pre-activated carbon (301) and the mineralization layer (302), and between the mineralization layer (302) and the post-activated carbon (303). The partition (304) has a first water-permeable hole.

3. A water purifier with a mineralization filter element according to claim 1, characterized in that, The first housing (1) includes: The main body (101) has a support pipe (109) fixedly connected to the center of its inner bottom. An overflow hole (105) is opened at the bottom of the main body (101) and located outside the support pipe (109). The top of the main body (101) is connected to an expansion section (102). The water inlet (103) is connected to the outside of the expansion section (102), and a pressure valve group (107) is provided inside the water inlet (103). The upper cover (108) is fixedly installed on the top of the expanded diameter section (102), and the top of the upper cover (108) is provided with a central hole.

4. A water purifier with a mineralization filter element according to claim 3, characterized in that: The bottom of the upper cover (108) is provided with an auxiliary frame (8), and a pressing member is provided below the end of the auxiliary frame (8). An annular piece (10) is provided below the auxiliary frame (8), and the annular piece (10) corresponds to the top of the annular liner (4).

5. A water purifier with a mineralization filter element according to claim 1, characterized in that, The drainage tube (5) includes: A flexible hose (501) is fixedly connected to a tapered member (502) at one end. The end of the tapered member (502) away from the flexible hose (501) is folded outward to form a fastening part (503). The fastening part (503) corresponds to the top end of the support tube (109).

6. A water purifier with a mineralization filter element according to claim 1, characterized in that, The annular liner (4) includes: The annular body (401) has several circumferentially distributed positioning fins (402) fixedly connected to its bottom end.

7. A water purifier with a mineralization filter element according to claim 1, characterized in that, The inner fitting (9) includes: The large-diameter section (901), the variable-diameter section (902), and the small-diameter section (903) are integrally designed from bottom to top.

8. A water purifier with a mineralization filter element according to claim 7, characterized in that: A one-way valve (7) is provided on the inner side of the small diameter section (903).

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