Filter element

Abstract

The filter element comprises a filter bottle and a filter unit arranged in the filter bottle, one end of the filter bottle is provided with a guide slide way communicating the inner side and the outer side, the filter element further comprises an ejector rod, and the ejector rod is installed in the guide slide way in a sliding mode. A pure water discharge channel for the filtering unit to discharge pure water outwards is formed in the ejector rod, a waste water discharge channel for the filtering unit to discharge waste water outwards is defined by the ejector rod and the inner wall of the guide slide way, and the ejector rod slides along the guide slide way to open or close the outlet end of the waste water discharge channel. The filter element is simple in structure, few in parts and small in occupied installation space, the pure water discharging channel and the waste water discharging channel can be closed at the same time by the ejector rod through reasonable arrangement, multiple purposes are achieved, the number of the parts is greatly reduced, the accessory cost and the installation cost are reduced, the filter element structure is simplified, the structural compactness is improved, and the filter element is suitable for popularization and application. The purpose of reducing the installation space is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purifiers, and particularly relates to a filter core. BACKGROUND

[0002] A water purifier is mainly used for filtering and purifying water to make the water quality reach the safe and healthy drinking standard. With the gradual attention of people to drinking water health, household water purifiers have gradually become indispensable daily necessities in people's lives.

[0003] A key component of a household water purifier is a filter core, which can filter raw water and remove solid particles and harmful chemical components in the water during the water purification process. The filter core mainly comprises a filter bottle and a filter unit arranged in the filter bottle. The filter unit usually adopts one or more of PP cotton, activated carbon, reverse osmosis membrane, nanofiltration membrane and ultrafiltration membrane. An inlet channel formed between the filter unit and the filter bottle is used for the inlet of raw water. The filter unit is hollow and forms a pure water discharge channel for discharging pure water and a waste water discharge channel surrounding the pure water discharge channel for discharging waste water.

[0004] In the conventional filter core technology, there is generally no water-stopping structure for the pure water discharge channel and the waste water discharge channel. The pure water discharge channel and the waste water discharge channel are in an open state. When the filter core is removed from the filter core seat of the water purifier, the remaining pure water and waste water in the filter core are likely to flow out of the open pure water discharge channel and waste water discharge channel respectively, resulting in water leakage. It is very inconvenient to use. In the existing filter core technology, in order to solve the above problem, a one-way valve is arranged in each of the pure water discharge channel and the waste water discharge channel. When the filter core is removed from the filter core seat of the water purifier, the one-way valve closes the pure water discharge channel and the waste water discharge channel. However, the multiple one-way valves have many accessories and require a large installation space, resulting in a bulky overall structure of the filter core, a large space occupied on the filter core seat, and being not conducive to the development of lightness and miniaturization of the water purifier. CONTENT OF THE INVENTION

[0005] The present application provides a filter core to improve the technical problem of many accessories and large installation space in the existing filter core which closes the pure water discharge channel and the waste water discharge channel by a one-way valve.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The filter core comprises a filter bottle and a filter unit arranged in the filter bottle, one end of the filter bottle is provided with a guide slide communicating between the inside and outside, the filter core further comprises a top rod, the top rod is slidingly arranged in the guide slide, a pure water discharge channel for discharging pure water outwardly from the filter unit is formed in the top rod, the top rod and the inner wall of the guide slide enclose a wastewater discharge channel for discharging wastewater outwardly from the filter unit, the top rod slides along the guide slide to open or close the outlet end of the wastewater discharge channel.

[0008] The filter core further comprises the following additional technical features:

[0009] The end of the guide slide is provided with a limiting stop rib which is inwardly folded, the top rod is provided with a water stop rib which protrudes in the radial direction, the water stop rib abuts against the limiting stop rib to close the outlet end of the wastewater discharge channel, the top rod slides in the direction of entering the filter bottle to separate the water stop rib from the limiting stop rib to open the outlet end of the wastewater discharge channel.

[0010] The water stop rib is provided with spaced guide protrusions in the circumferential direction, the guide protrusions abut against the inner wall of the guide slide, and a water passing gap for wastewater passing through is formed between adjacent two guide protrusions.

[0011] The top rod is provided with guide protruding ribs extending in the axial direction, a plurality of guide protruding ribs are spaced in the circumferential direction of the top rod, the guide protruding ribs abut against the inner wall of the limiting stop rib, and a water passing channel for discharging wastewater from the outlet end is formed between adjacent two guide protruding ribs.

[0012] A resilient member is arranged between the top rod and the filter unit, the resilient member applies a resilient force to the top rod to maintain the position of the top rod closing the outlet end.

[0013] The filter unit comprises an RO unit, the RO unit comprises an RO membrane wound in a roll shape, an end cover is connected to the water outlet end of the RO membrane, a pure water outlet channel is formed in the center of the RO membrane, the end cover is provided with a jack which is opposite to the pure water outlet channel, one end of the top rod is exposed to the outside of the filter bottle, the other end of the top rod is arranged in the jack and the pure water outlet channel through the guide slide, so that the pure water outlet channel and the pure water discharge channel are communicated, a wastewater outlet channel of the filter unit is formed between the end cover and the RO membrane, and the filter unit discharges wastewater through the wastewater outlet channel and the wastewater discharge channel in sequence.

[0014] The top rod is sleeved with a first sealing body, the first sealing body is fixedly connected with the top rod in the axial direction, when the top rod opens the outlet end of the wastewater discharge channel, the first sealing body opens the insertion hole, so that the wastewater outlet channel is communicated with the wastewater discharge channel through the insertion hole; when the top rod closes the outlet end of the wastewater discharge channel, the first sealing body closes the insertion hole to cut off the communication state between the wastewater outlet channel and the wastewater discharge channel.

[0015] The top rod is sleeved with a second sealing body, the second sealing body forms a seal between the top rod and the inner wall of the pure water outlet channel; and / or the end cover is sleeved with a third sealing body, the third sealing body forms a seal between the end cover and the inner wall of the guide slide.

[0016] The filter unit further comprises an activated carbon fiber unit, the activated carbon fiber unit comprises activated carbon fibers wound into a roll shape, the activated carbon fibers are connected to the water inlet end of the RO membrane through a partition, the central part of the activated carbon fibers forms a pure water outlet channel, the partition is provided with a water passing hole, and the pure water outlet channel is communicated with the water inlet end of the RO membrane through the water passing hole.

[0017] The filter unit and the inner wall of the filter bottle form a raw water inlet channel, the filter bottle is provided with a raw water inlet opening communicated with the raw water inlet channel, and a one-way valve is arranged in the raw water inlet opening.

[0018] Due to the adoption of the above technical solutions, the application has at least the following technical effects:

[0019] 1. The filter cartridge provided by the present application, the top rod is slidingly installed in the guide slide, and the outlet end of the wastewater discharge channel can be opened or closed by sliding the top rod, so that when the filter cartridge is arranged to be connected with the filter cartridge seat of the water purifier, the components on the filter cartridge seat can slide the top rod to open the outlet end of the wastewater discharge channel, and then the filter cartridge can discharge wastewater outside through the wastewater discharge channel during water production, and when the filter cartridge is removed from the filter cartridge seat, the top rod can be controlled to slide to the position of closing the outlet end of the wastewater discharge channel, so that the wastewater remaining in the filter cartridge cannot flow out of the wastewater discharge channel, thereby avoiding the phenomenon of wastewater leakage. In addition, compared with the existing way of closing the wastewater discharge channel by a one-way valve, the top rod structure is simple, has fewer parts, and occupies less space. In the preferred scheme, the top rod can also be arranged in an elongated structure, and the inner diameter of the pure water discharge channel is effectively reduced, so that when the filter cartridge is removed from the filter cartridge seat, the atmospheric pressure outside can enter the pure water discharge channel to form an air seal on the pure water discharge channel, thereby preventing the pure water remaining in the filter cartridge from flowing out of the pure water discharge channel, thereby avoiding the phenomenon of pure water leakage. Therefore, by such arrangement, the top rod, which is one component, can simultaneously close the pure water discharge channel and the wastewater discharge channel, thereby achieving one component with multiple functions, greatly reducing the number of parts, reducing the cost of accessories and installation, simplifying the structure of the filter cartridge, improving the compactness of the structure, and achieving the purpose of reducing the installation space.

[0020] 2. As a preferred way of the present application, the top rod closes the outlet end of the wastewater discharge channel by abutting against the water blocking rib and the limiting rib, which has a simple structure and is easy to process. The top rod slides in the direction of entering the filter bottle to separate the water blocking rib and the limiting rib to open the outlet end of the wastewater discharge channel. When the filter cartridge is arranged to be connected with the filter cartridge seat of the water purifier, only the components on the filter cartridge seat need to be used to push the top rod to slide inward to open the outlet end of the wastewater discharge channel. When the filter cartridge is removed from the filter cartridge seat, the top rod slides outward to close the outlet end of the wastewater discharge channel, and the direction of the outward sliding of the top rod is consistent with the direction of the outward flow of the wastewater, so that the pressure of the wastewater formed on the water blocking rib can drive the top rod to slide outward and maintain the state of abutting the water blocking rib and the limiting rib, thereby ensuring that the outlet end of the wastewater discharge channel is reliably closed.

[0021] 3. As a preferred way of the present application, an elastic member is arranged between the top rod and the filter unit, and the elastic member applies an elastic force to the top rod to maintain the position of the top rod closing the outlet end of the wastewater discharge channel. Specifically, when the top rod slides to open the outlet end of the wastewater discharge channel, the elastic member is compressed by the extrusion of the top rod, and when the filter cartridge is removed from the filter cartridge seat, the pushing force of the top rod on the filter cartridge seat disappears, at which time the elastic member can recover the deformation to drive the top rod to move towards the position of closing the outlet end of the wastewater discharge channel, and the elastic member still applies a force to the top rod to maintain the position of the top rod after the top rod closes the outlet end of the wastewater discharge channel.

[0022] 4. As a preferred mode of the present application, one end of the ejector rod is exposed outside the filter bottle, and the other end is inserted into the insertion hole and the pure water outlet channel through the guide slide. The end of the ejector rod exposed outside the filter bottle can be matched with the components on the filter core seat to facilitate the components on the filter core seat to directly push the ejector rod to slide outside the filter bottle. The end of the ejector rod inserted into the insertion hole and the pure water outlet channel can form a sliding guide effect through the insertion hole and the pure water outlet channel, so that the ejector rod stably slides in a straight line direction back and forth, and can also keep the state of being connected with the pure water outlet channel no matter the ejector rod slides to the position of closing the waste water discharge channel or slides to the position of opening the waste water discharge channel, thereby avoiding the ejector rod from being separated from the RO membrane to affect the discharge of pure water. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0024] Figure 1 A cross-sectional view of the filter core provided by the embodiment of the present application Figure 1 ;

[0025] Figure 2 A cross-sectional view of the filter core provided by the embodiment of the present application Figure 1 , which shows the position of the ejector rod at the outlet end of the opened waste water discharge channel;

[0026] Figure 3 A cross-sectional view of the filter core provided by the embodiment of the present application Figure 2 , which shows the position of the ejector rod at the outlet end of the closed waste water discharge channel;

[0027] Figure 4 A structural schematic view of the ejector rod provided by the embodiment of the present application;

[0028] Figure 5 A cross-sectional view of the filter bottle provided by the embodiment of the present application;

[0029] Figure 6 An assembly view of the filter unit provided by the embodiment of the present application;

[0030] Figure 7 A cross-sectional view of the filter unit provided by the embodiment of the present application.

[0031] List of components and reference numerals:

[0032] 1 filter bottle, 11 guide slide, 12 limiting stop rib, 13 raw water inlet;

[0033] 2 top rod, 21 pure water discharge channel, 22 water baffle, 23 guide convex part, 24 guide convex rib;

[0034] 3 waste water discharge channel;

[0035] 4 elastic member;

[0036] 51 RO membrane, 52 end cover, 521 insertion hole, 53 pure water outlet channel, 54 waste water outlet channel, 55 activated carbon fiber, 56 partition, 561 water passing hole, 57 clean water outlet channel;

[0037] 6 first sealing body;

[0038] 7 second sealing body;

[0039] 8 third sealing body;

[0040] 9 raw water inlet channel;

[0041] 10 one-way valve. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0043] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can be practiced in other manners different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0044] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0047] In the embodiments of the present application, a filter cartridge is provided, and the following description provided by the present application is based on the illustration of the product structure. Of course, those skilled in the art can understand that the above structure is only a specific example and illustrative description, and cannot constitute a specific limitation on the technical solutions provided by the present application.

[0048] As shown in Figures 1 to 7 A filter cartridge provided by the present application includes a filter bottle 1 and a filter unit arranged in the filter bottle 1. One end of the filter bottle 1 is provided with a guide slide 11 communicating the inside and the outside. The filter cartridge further includes a top rod 2, which is slidingly installed in the guide slide 11. The top rod 2 is internally formed with a pure water discharge channel 21 for discharging pure water outward by the filter unit. The top rod 2 and the inner wall of the guide slide 11 enclose a wastewater discharge channel 3 for discharging wastewater outward by the filter unit. The top rod 2 slides along the guide slide 11 to open or close the outlet end of the wastewater discharge channel 3. Figure 1 and Figure 2 As shown in the figure, the top rod opens the outlet end of the wastewater discharge channel 3; Figure 3 As shown in the figure, the top rod closes the outlet end of the wastewater discharge channel 3.

[0049] The filter cartridge provided by the present application can be applied to a household water purifier as a whole, and of course, it also has reference significance for other water purification equipment. It should be noted that the filter unit is not limited by the present application, which can be a single material structure, such as any one of RO membrane, nanofiltration membrane, and ultrafiltration membrane. It can also be a composite structure, for example, a composite structure composed of activated carbon and any one of RO membrane, nanofiltration membrane, and ultrafiltration membrane.

[0050] The top rod 2 is slidingly installed in the guide slide 11, and the outlet end of the wastewater discharge channel 3 can be opened or closed by the sliding of the top rod 2. Therefore, when the filter core is arranged to be in butt joint with the filter core seat of the water purifier, the components on the filter core seat can slide the top rod 2 to open the outlet end of the wastewater discharge channel 3, so that the wastewater in the filter core can be discharged to the outside through the wastewater discharge channel 3 during the water production process. When the filter core is removed from the filter core seat, the top rod 2 can be controlled to slide to the position of closing the outlet end of the wastewater discharge channel 3, so that the wastewater remaining in the filter core cannot flow out of the wastewater discharge channel 3, thereby avoiding the wastewater leakage phenomenon. In addition, compared with the existing way of closing the wastewater discharge channel by the one-way valve, the top rod 2 has simple structure, fewer parts, and smaller space occupation. In addition, generally, the amount of pure water remaining in the filter core before the filter core is replaced is very small, and even if the pure water discharge channel is not closed when the filter core is removed, too much pure water will not leak out. Therefore, in the preferred scheme, the top rod 2 can also be arranged in an elongated structure to effectively reduce the inner diameter of the pure water discharge channel 21, so that when the filter core is removed from the filter core seat, the atmospheric pressure outside enters the pure water discharge channel 21 to form an air seal on the pure water discharge channel 21, thereby preventing the pure water remaining in the filter core from flowing out of the pure water discharge channel 21, thereby avoiding the pure water leakage phenomenon. Therefore, by such arrangement, the top rod 2 can simultaneously close the pure water discharge channel 21 and the wastewater discharge channel 3, thereby achieving one-piece multi-use, greatly reducing the number of parts, reducing the cost of accessories and installation, simplifying the structure of the filter core, improving the compactness of the structure, and achieving the purpose of reducing the installation space. Specifically, the top rod 2 can slide out of the filter bottle 1 along the guide slide 11 to open the outlet end of the wastewater discharge channel 3, and slide into the filter bottle 1 to close the outlet end of the wastewater discharge channel 3. Alternatively, the top rod 2 can slide into the filter bottle 1 along the guide slide 11 to close the outlet end of the wastewater discharge channel 3, and slide out of the filter bottle 1 to open the outlet end of the wastewater discharge channel 3.

[0051] As a preferred embodiment of the present application, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown, the end of the guide slide 11 is provided with an inwardly retracting limiting stop rib 12, and the top rod 2 is provided with a radially protruding water stop rib 22, which abuts against the limiting stop rib 12 to close the outlet end of the wastewater discharge channel 3; the top rod 2 slides in the direction of entering the filter bottle 1 to separate the water stop rib 22 from the limiting stop rib 12 to open the outlet end of the wastewater discharge channel 3. Those skilled in the art can understand that, by abutting the water stop rib 22 against the end face of the limiting stop rib 12 to close the outlet end of the wastewater discharge channel 3, the structure is simple, and the water stop rib 22 and the limiting stop rib 12 are easy to process. The top rod 2 slides in the direction of entering the filter bottle 1 to separate the water stop rib 22 from the limiting stop rib 12 to open the outlet end of the wastewater discharge channel 3. When the filter core is arranged to be in butt joint with the filter core seat of the water purifier, only the top rod 2 needs to be pushed and slid into the filter bottle 1 by using the components on the filter core seat to open the outlet end of the wastewater discharge channel 3; when the filter core is detached from the filter core seat, the top rod 2 slides outward to close the outlet end of the wastewater discharge channel 3, and the direction in which the top rod 2 slides outward is consistent with the direction in which the wastewater flows outward, so that the pressure of the wastewater formed on the water stop rib 22 can drive the top rod 2 to slide outward and maintain the state that the water stop rib 22 abuts against the limiting stop rib 12, thereby ensuring that the outlet end of the wastewater discharge channel 3 is reliably closed.

[0052] In addition, the greater the contact area between the water stop rib 22 and the limiting stop rib 12, the better the sealing effect on the outlet end of the wastewater discharge channel 3, so the water stop rib 22 is preferably maximally extended to abut against the inner wall of the guide slide 11 along the radial direction of the top rod 2, and in order to allow the wastewater to flow when the water stop rib 22 is separated from the limiting stop rib 12, in the preferred embodiment, as shown in Figure 4 the water stop rib 22 is provided with spaced guide protrusions 23 along the circumferential direction, the guide protrusions 23 abut against the inner wall of the guide slide 11, and a water passing gap is formed between adjacent two guide protrusions 23 for the wastewater to pass through. The guide protrusions 23 are arranged to enable the water stop rib 22 to abut against the inner wall of the guide slide 11 to increase the contact area with the limiting stop rib 12, and to enable the guide slide 11 to limit and guide the sliding of the top rod 2 in the radial direction, and to enable the wastewater to flow through the water passing gap between adjacent two guide protrusions 23.

[0053] As a preferred embodiment of the present embodiment, as shown in Figure 2 and Figure 4As shown, the top rod 2 is provided with axially extending guide ribs 24, a plurality of the guide ribs 24 are distributed along the circumference of the top rod 2, the guide ribs 24 abut against the inner wall of the limiting ribs 12, and a water passing channel for discharging wastewater from the outlet end is formed between two adjacent guide ribs 24. Those skilled in the art can understand that, in order to avoid radial shaking of the top rod 2 and ensure reliable axial sliding, the top rod 2 needs to be radially limited, therefore, the guide ribs 24 abut against the inner wall of the limiting ribs 12 to radially limit the top rod 2, and also guide the axial sliding of the top rod 2, and on this basis, in order to ensure that the wastewater can be discharged from the wastewater discharge channel 3, the water passing channel for discharging wastewater from the outlet end is formed between two adjacent guide ribs 24, so that the wastewater flowing from the water passing gap to the outlet end can be discharged through the water passing channel.

[0054] As a preferred embodiment of the present application, as shown in Figures 1 to 3 As shown, the top rod 2 and the filter unit are provided with an elastic member 4, the elastic member 4 applies an elastic force to the top rod 2 to maintain the position of the top rod 2 closing the outlet end. Specifically, when the top rod 2 slides to open the outlet end of the wastewater discharge channel 3, the elastic member 4 is compressed by the extrusion of the top rod 2, when the filter element is detached from the filter element seat, the pushing force of the filter element seat to the top rod 2 disappears, at this time, the elastic member 4 can restore the deformation to drive the top rod 2 to move towards the position closing the outlet end of the wastewater discharge channel 3, and still applies a force to the top rod 2 to maintain the position of the top rod 2 after the top rod 2 closes the outlet end of the wastewater discharge channel 3. The elastic member 4 can be a spring, the spring is sleeved on the top rod 2, one end abuts against the water stopping rib 22, and the other end abuts against the filter unit. Of course, the elastic member 4 can also be other suitable structures with elasticity.

[0055] As a preferred embodiment of the present application, as shown in Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown, the filter unit comprises an RO unit, the RO unit comprises an RO membrane 51 wound in a roll shape, an end cover 52 is connected to the water outlet end of the RO membrane 51, a pure water outlet channel 53 is formed in the center of the RO membrane 51, the end cover 52 is provided with a jack 521 opposite to the pure water outlet channel 53, one end of the ejector rod 2 is exposed outside the filter bottle 1, the other end passes through the guide slide 11 and is arranged in the jack 521 and the pure water outlet channel 53, so that the pure water outlet channel 53 is communicated with the pure water discharge channel 21, the waste water outlet channel 54 of the filter unit is formed between the end cover 52 and the RO membrane 51, and the filter unit discharges waste water through the waste water outlet channel 54 and the waste water discharge channel 3 in sequence. The end of the ejector rod 2 exposed outside the filter bottle 1 can be matched with the components on the filter core seat to facilitate the components on the filter core seat to directly push the ejector rod 2 to slide outside the filter bottle 1, and the end of the ejector rod 2 arranged in the jack 521 and the pure water outlet channel 53 can form a sliding guide effect through the jack 521 and the pure water outlet channel 53, so that the ejector rod 2 stably slides in a straight line direction, and can keep the state of being inserted and communicated with the pure water outlet channel 53 no matter the ejector rod 2 slides to the position of closing the waste water discharge channel 3 or the position of opening the waste water discharge channel 3, thereby avoiding that the ejector rod 2 is separated from the RO membrane 51 to affect the pure water discharge.

[0056] In a preferred embodiment, as shown in Figure 2 and Figure 3 As shown, the ejector rod 2 is sleeved with a first sealing body 6, the first sealing body 6 is fixed relative to the ejector rod 2 in the axial direction, when the ejector rod 2 opens the outlet end of the waste water discharge channel 3, the first sealing body 6 opens the jack 521, so that the waste water outlet channel 54 is communicated with the waste water discharge channel 3 through the jack 521; when the ejector rod 2 closes the outlet end of the waste water discharge channel 3, the first sealing body 6 closes the jack 521 to cut off the communication state between the waste water outlet channel 54 and the waste water discharge channel 3. Those skilled in the art can understand that the first sealing body 6 is fixed relative to the ejector rod 2 in the axial direction, so that the first sealing body 6 slides together with the ejector rod 2, and then opens the jack 521 synchronously when the ejector rod 2 opens the outlet end of the waste water discharge channel 3, so that the waste water enters the waste water discharge channel 3 through the jack 521, and the first sealing body 6 closes the jack 521 synchronously when the ejector rod 2 closes the outlet end of the waste water discharge channel 3, so that the waste water cannot enter the waste water discharge channel 3 through the jack 521, therefore, the closing of the jack 521 by the first sealing body 6 and the closing of the outlet end of the waste water discharge channel 3 by the ejector rod 2 form a double water stop effect, which reliably prevents the waste water from leaking outwards when the filter core is detached from the filter core seat.

[0057] In a preferred embodiment, as shown in Figure 2As shown, the top rod 2 is sleeved with a second sealing body 7, which forms a seal between the top rod 2 and the inner wall of the pure water outlet channel 53, avoiding the mixing of pure water and waste water. In a preferred embodiment, as shown in Figure 2 As shown, the end cover 52 is sleeved with a third sealing body 8, which forms a seal between the end cover 52 and the inner wall of the guide chute 11, avoiding the outward leakage of waste water from between the end cover 52 and the inner wall of the guide chute 11.

[0058] Regarding the structure of the filter unit, on the basis that it includes an RO unit, it is further preferred that, as shown in Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, the filter unit further includes an activated carbon fiber unit, which includes activated carbon fibers 55 wound into a roll shape, the activated carbon fibers 55 being connected to the water inlet end of the RO membrane 51 through a partition 56, the central part of the activated carbon fibers 55 forming a pure water outlet channel 57, the partition 56 being provided with a water passing hole 561, and the pure water outlet channel 57 being communicated with the water inlet end of the RO membrane 51 through the water passing hole 561. The filter unit constitutes a composite structure composed of an RO unit and an activated carbon fiber unit, the activated carbon fibers 55 being connected to the water inlet end of the RO membrane 51 through the partition 56, and the water passing hole 561 of the partition 56 communicating the pure water outlet channel 57 of the activated carbon fibers 55 with the water inlet end of the RO membrane 51, so that the raw water is first filtered by the activated carbon fibers 55 into pure water, and then filtered by the RO membrane 51 into pure water, realizing double filtration, which helps to improve the filtration effect and in turn improve the quality of the pure water.

[0059] Further, as shown in Figure 2 and Figure 3 The filter unit and the inner wall of the filter bottle 1 form a raw water inlet channel 9 therebetween, the filter bottle 1 is provided with a raw water inlet 13 communicated with the raw water inlet channel 9, and the raw water inlet 13 is provided with a one-way valve 10 therein. Specifically, the one-way valve 10 can adopt a structure with a housing, a valve core and a spring, and a water flow channel is formed between the housing and the valve core. The one-way valve 10 can be turned on when the filter core and the filter core seat are docked, and specifically, the one-way valve 10 can be turned on by pushing the valve core through the push rod arranged on the filter core seat. When the filter core is removed from the filter core seat, the valve core is driven by the spring to close the water flow channel in the one-way valve 10, preventing the raw water left in the filter core from leaking outwards.

[0060] The places not mentioned in the present application can be realized by adopting or referring to the existing technology.

[0061] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments.

[0062] The above merely provides an example of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A filter cartridge, characterized by, The filter cartridge comprises a filter bottle and a filter unit arranged in the filter bottle, one end of the filter bottle is provided with a guide chute for communication between the inside and outside, the filter cartridge further comprises a top rod, the top rod is slidingly arranged in the guide chute, a pure water discharge channel is formed in the top rod for discharging pure water from the filter unit, the top rod and the inner wall of the guide chute enclose a wastewater discharge channel for discharging wastewater from the filter unit, the top rod slides along the guide chute to open or close the outlet end of the wastewater discharge channel.

2. The filter cartridge according to claim 1, wherein an end of the guide chute is provided with a limiting stop rib which is inwardly folded, the top rod is provided with a water stop rib which protrudes in the radial direction, the water stop rib abuts against the limiting stop rib to close the outlet end of the wastewater discharge channel, the top rod slides in the direction of entering the filter bottle to separate the water stop rib from the limiting stop rib to open the outlet end of the wastewater discharge channel.

3. The filter cartridge according to claim 2, wherein the water stop rib is provided with spaced guide protrusions in the circumferential direction, the guide protrusions abut against the inner wall of the guide chute, and a water passing gap is formed between adjacent two guide protrusions for wastewater to pass through.

4. The filter cartridge according to claim 2, wherein the top rod is provided with guide protruding ribs which extend in the axial direction, a plurality of guide protruding ribs are spaced in the circumferential direction of the top rod, the guide protruding ribs abut against the inner wall of the limiting stop rib, and a water passing channel is formed between adjacent two guide protruding ribs for wastewater to discharge from the outlet end.

5. The filter cartridge according to claim 1, wherein a resilient member is arranged between the top rod and the filter unit, the resilient member applies a resilient force to the top rod to maintain the position of the top rod closing the outlet end.

6. The filter cartridge according to claim 1, wherein the filter unit comprises an RO unit, the RO unit comprises an RO membrane which is wound in a roll shape, an end cover is connected to the water outlet end of the RO membrane, a pure water outlet channel is formed in the center of the RO membrane, the end cover is provided with a jack which is opposite to the pure water outlet channel, one end of the top rod is exposed to the outside of the filter bottle, and the other end passes through the guide chute and is arranged in the jack and the pure water outlet channel to make the pure water outlet channel communicate with the pure water discharge channel, a wastewater outlet channel of the filter unit is formed between the end cover and the RO membrane, and the filter unit discharges wastewater through the wastewater outlet channel and the wastewater discharge channel in sequence.

7. The filter cartridge according to claim 6, wherein the top rod is sleeved with a first sealing body, the first sealing body is fixed in the axial direction relative to the top rod, when the top rod opens the outlet end of the wastewater discharge channel, the first sealing body opens the jack to make the wastewater outlet channel communicate with the wastewater discharge channel through the jack, and when the top rod closes the outlet end of the wastewater discharge channel, the first sealing body closes the jack to cut off the communication state between the wastewater outlet channel and the wastewater discharge channel.

8. The filter cartridge according to claim 6, wherein The top rod is sleeved with a second sealing body, and the second sealing body forms a seal between the top rod and the inner wall of the pure water outlet channel; And / or, the end cover is sleeved with a third sealing body, and the third sealing body forms a seal between the end cover and the inner wall of the guide slide.

9. The filter cartridge according to claim 6, wherein, The filter unit further comprises an activated carbon fiber unit, the activated carbon fiber unit comprises activated carbon fibers wound into a roll shape, the activated carbon fibers are connected to the water inlet end of the RO membrane through a partition, the center of the activated carbon fibers forms a pure water outlet channel, the partition is provided with a water passing hole, and the pure water outlet channel communicates with the water inlet end of the RO membrane through the water passing hole.

10. The filter cartridge according to claim 9, wherein, A raw water inlet channel is formed between the filter unit and the inner wall of the filter bottle, the filter bottle is provided with a raw water inlet opening in communication with the raw water inlet channel, and a one-way valve is arranged in the raw water inlet opening.

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