CN219929866U - Filter element and water purifying device - Google Patents

Abstract

The utility model discloses a filter element and a water purifying device, which relate to the technical field of water treatment, wherein the filter element comprises: a housing; a raw water inlet; a waste water outlet; a purified water outlet; the scale inhibition device comprises a first filtering unit, a second filtering unit and a scale inhibition material release piece, wherein the first filtering unit, the second filtering unit and the scale inhibition material release piece are arranged in a shell, and the scale inhibition material release piece is arranged outside the second filtering unit; the raw water inlet is communicated with the raw water end of the second filtering unit, the waste water end of the second filtering unit is communicated with the waste water outlet, and the purified water end of the second filtering unit is communicated with the purified water outlet; the scale inhibiting substance release member is positioned upstream of the raw water end of the second filtering unit; the first filter unit is located upstream of the raw water end of the second filter unit, or the first filter unit is located downstream of the purified water end of the second filter unit. The utility model can reduce the degree of crystallization in the second filter unit and compound the filter units at the same time, thereby reducing the number of all filter elements in the water purifying device.

Description

Filter element and water purifying device

Technical Field

The utility model relates to the technical field of water treatment, in particular to a filter element and a water purifying device.

Background

Since raw water contains a large amount of impurities before being filtered, some of the impurities crystallize on the surface of the filtering membrane, thereby reducing the filtering performance of the filtering membrane and its lifetime. Although the degree of crystallization on the surface of the filtration membrane can be reduced by washing the surface of the filtration membrane with pure water, the structure of the whole water purification apparatus is complicated by adopting such a method, and the cost is high due to repeated washing. Therefore, the filter element developed at present is provided with the scale inhibitor, so that the crystallization degree of the surface of the filter membrane is reduced, but the filter element is low in compound degree, and a single filter element needs a better structure for installing the scale inhibitor, otherwise, the problems of large volume or unreasonable structure of the filter element are caused.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present utility model provides a filter element and a water purifying device, which can reduce the degree of crystallization formed in the second filter unit, and at the same time, compound the filter units, so as to reduce the number of all filter elements in the water purifying device.

The specific technical scheme of the embodiment of the utility model is as follows:

a filter cartridge, the filter cartridge comprising:

a housing; a raw water inlet; a waste water outlet; a purified water outlet;

the scale inhibition device comprises a first filtering unit, a second filtering unit and a scale inhibition material release piece, wherein the first filtering unit, the second filtering unit and the scale inhibition material release piece are arranged in the shell, and the scale inhibition material release piece is arranged outside the second filtering unit;

the raw water inlet is communicated with the raw water end of the second filtering unit, the waste water end of the second filtering unit is communicated with the waste water outlet, and the purified water end of the second filtering unit is communicated with the purified water outlet; the scale inhibiting substance releasing member is located upstream of the raw water end of the second filtering unit so that water flowing in from the raw water inlet flows through the scale inhibiting substance releasing member and then enters the raw water end of the second filtering unit;

The first filter unit is positioned upstream of the raw water end of the second filter unit, so that water flowing in from the raw water inlet flows through the scale inhibiting substance release member and the first filter unit and then enters the raw water end of the second filter unit; or the first filtering unit is positioned downstream of the water purifying end of the second filtering unit, so that the purified water flowing out of the water purifying end of the second filtering unit passes through the first filtering unit and then enters the purified water outlet.

Preferably, the second filter unit comprises at least one of: RO membrane filtration unit, nanofiltration membrane filtration unit, ultrafiltration membrane filtration unit.

Preferably, when the first filter unit is located upstream of the raw water end of the second filter unit, the first filter unit includes a PP cotton filter unit;

when the first filter unit is located downstream of the water purifying end of the second filter unit, the first filter unit is made of an activated carbon material.

Preferably, the scale inhibitor release member includes a body having scale inhibitor particles thereon having a hollowed-out structure so that water can flow from the outside of the scale inhibitor release member into the inside.

Preferably, the filter element has a radial direction, and when the first filter unit is located upstream of the raw water end of the second filter unit in the radial direction of the filter element, the scale inhibiting substance releasing member, the first filter unit, and the second filter unit are sequentially arranged from outside to inside, or the first filter unit, the scale inhibiting substance releasing member, and the second filter unit are sequentially arranged from outside to inside.

Preferably, the filter cartridge further comprises: a first end cap disposed at an end of the first filter unit and the second filter unit; a partial water inlet channel is formed between the first end cover and the shell; when the scale inhibiting substance release piece, the first filtering unit and the second filtering unit are sequentially arranged from outside to inside, a part of water inlet channel is formed between the outer side wall of the scale inhibiting substance release piece and the inner side wall of the shell; the raw water inlet is communicated with the raw water end of the second filtering unit through the water inlet channel, and the scale inhibiting substance release piece is positioned in the water inlet channel.

Preferably, the filter cartridge further comprises: the water inlet part of the third filtering unit is communicated with the water purifying end of the second filtering unit, and the water outlet part of the third filtering unit is communicated with the water purifying outlet;

A second end cover component is arranged at the end part of the third filtering unit; a waste water outlet channel is formed between the first end cover and the second end cover assembly, and the waste water end of the second filtering unit is communicated with the waste water outlet through the waste water outlet channel; and a first water outlet channel is formed in the second end cover assembly, and the purified water outlet is communicated with the water outlet part of the third filtering unit through the first water outlet channel.

Preferably, the first end cap includes a first body portion extending in a radial direction, a first connection portion extending in an axial direction at a middle portion of the first body portion; the second end cover assembly comprises a second body part extending along the radial direction and a second connecting part located in the middle of the second body part and extending along the axial direction, the second connecting part penetrates through the first connecting part, a part of wastewater outlet channel is formed between the inner side wall of the first connecting part and the outer side wall of the second connecting part, and a part of wastewater outlet channel is formed between the first body part and the second body part.

Preferably, the housing has a port; the filter cartridge includes: the waterway connecting piece is arranged at the port and is provided with the raw water inlet, the waste water outlet and the purified water outlet, and the waterway connecting piece is sequentially provided with a first annular extending part and a second annular extending part from outside to inside; the first connecting part enters the first annular extending part, and the outer side wall of the first connecting part is sealed with the inner side wall of the first annular extending part; the second connecting part enters the second annular extending part, and the outer side wall of the second connecting part is sealed with the inner side wall of the second annular extending part;

The raw water inlet is communicated with the water inlet part of the first filtering unit through the outer side of the first annular extension part and the water inlet channel; the waste water outlet is communicated with the waste water end of the second filtering unit through a gap between the first annular extension part and the second annular extension part and the waste water outlet channel; the purified water outlet is communicated with the water outlet part of the third filtering unit through the inside of the second annular extension part and the first water outlet channel.

Preferably, the third filtering unit is tubular, and a second water outlet channel communicated with the first water outlet channel is formed inside the third filtering unit; the purified water outlet is communicated with the water outlet part of the third filtering unit through the first water outlet channel and the second water outlet channel.

Preferably, the filter cartridge comprises: the second filtering unit is wound or sleeved outside the central tube; the central pipe is provided with a communication hole which enables the water purifying part of the second filtering unit to be communicated with the inside of the central pipe; the inside of the central tube is communicated with the purified water outlet.

Preferably, the filter cartridge further comprises: a third filter unit disposed within the housing, the third filter unit disposed within the center tube; the water inlet part of the third filtering unit is communicated with the water purifying end of the second filtering unit, and the water outlet part of the third filtering unit is communicated with the water purifying outlet.

Preferably, one end of the central tube, which is far away from the purified water outlet, is in a blocking state, and the other end of the central tube, which is close to the purified water outlet, is in an open state; the end of the third filtering unit is provided with a second end cover assembly, and the second end cover assembly is used for plugging the other end of the central tube.

Preferably, the second end cap assembly comprises a first sub end cap and a second sub end cap, the first sub end cap seals the other end of the central tube, the first sub end cap is provided with a third extension part which extends towards the second sub end cap and is annular, a third connecting part which extends along the axial direction,

the second sub end cover is arranged at the end part of the third filtering unit and is provided with a fourth extension part which extends towards the direction of the first sub end cover and is in an annular shape, and the fourth extension part is inserted into the third extension part; and water flowing out of the water outlet part of the third filtering unit sequentially passes through the second sub end cover and the first sub end cover and then flows to the purified water outlet.

Preferably, the outer side wall of the third extension is sealed to the inner side wall of the central tube; the inner side wall of the third extension part and the outer side wall of the fourth extension part are sealed through a sealing ring.

Preferably, the third filter unit is made of an activated carbon material.

Preferably, the raw water end of the second filtering unit is located at an outer side wall of the second filtering unit, the waste water end of the second filtering unit is located at an end of the second filtering unit, and the water purifying end of the second filtering unit is located at an inner side wall of the second filtering unit.

Preferably, when the scale inhibiting substance release member, the first filtering unit and the second filtering unit are sequentially arranged from outside to inside, the first filtering unit is sleeved outside the second filtering unit;

or,

the first filter unit is directly formed at the outer side wall of the second filter unit, and the first filter unit and the second filter unit are of an integrated structure.

Preferably, the scale inhibitor particles comprise phosphate particles.

Preferably, the filter cartridge further comprises: and the third end cover is used for sealing one end, far away from the wastewater end, of the first filtering unit and the second filtering unit.

A water purification apparatus, the water purification apparatus comprising: a filter cartridge according to any one of the preceding claims.

The technical scheme of the utility model has the following remarkable beneficial effects:

In the filter element, raw water flows in from a raw water inlet, firstly flows through a scale inhibition substance release piece arranged outside the second filter unit, and the scale inhibition substance release piece releases scale inhibition substances, so that the raw water carries the scale inhibition substances, then enters the second filter unit from the raw water end of the second filter unit for filtering, the wastewater formed by filtering by the second filter unit flows out from a wastewater end and is discharged from a wastewater outlet, and the purified water formed by filtering by the second filter unit flows out from a purified water end and is discharged from a purified water outlet. Because the raw water carries the scale inhibiting substances, the raw water is not easy to crystallize on the surface of the filtering membrane of the second filtering unit, so that the filtering performance and the service life of the second filtering unit can be improved. When the first filter unit is located upstream of the raw water end of the second filter unit, water flowing in from the raw water inlet may flow through the scale inhibiting substance releasing member and the first filter unit and then enter the raw water end of the second filter unit; when the first filter unit is positioned at the downstream of the water purifying end of the second filter unit, the purified water flowing out of the water purifying end of the second filter unit can be filtered by the first filter unit and then discharged from the purified water outlet. Through the mode, the filter element can enable the first filter unit and the second filter unit to be arranged in the filter element in a combined mode, and meanwhile, the filter element has a scale inhibition function, so that the integration degree of the filter element can be improved, the number of all filter elements in the water purifying device and the occupied volume of all filter elements can be reduced, and the water purifying device is miniaturized. In addition, since the scale inhibiting substance releasing member is provided outside the second filter unit, the length of the filter element in the axial direction can be effectively reduced.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be.

FIG. 1 is a schematic view of a filter cartridge mounted on a waterway plate of a water purifier in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view showing a structure of a filter cartridge installed on a waterway plate of a water purifier according to an embodiment of the present utility model;

FIG. 3 is a partial cross-sectional view of a cartridge in accordance with an embodiment of the present utility model;

FIG. 4 is an exploded view of a cartridge without a housing in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic view showing the structure of a scale inhibitor release member according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the water flow after the filter membrane of the second filter unit is expanded and matched with the central tube in the embodiment of the utility model;

FIG. 7 is a perspective view of a water circuit connector according to an embodiment of the present utility model;

fig. 8 is a sectional view of a water path connecting member according to an embodiment of the present utility model.

Reference numerals of the above drawings:

1. a housing; 11. a port; 2. a waterway connector; 21. a raw water inlet; 22. a waste water outlet; 23. a purified water outlet; 24. a first annular extension; 25. a second annular extension; 3. a first filtering unit; 4. a second filtering unit; 5. a scale inhibiting substance releasing member; 6. a third filtering unit; 61. a second water outlet channel; 7. a second end cap assembly; 71. a first water outlet channel; 72. a second connecting portion; 73. a second body portion; 74. a first sub-end cap; 741. a third extension; 75. a second sub-end cap; 751. a fourth extension; 8. a wastewater outlet channel; 9. a central tube; 91. a communication hole; 10. a third end cap; 12. a first end cap; 121. a first body portion; 122. a first connection portion; 200. and the waterway plate.

Detailed Description

The details of the utility model will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the utility model. However, the specific embodiments of the utility model described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Given the teachings of the present utility model, one of ordinary skill in the related art will contemplate any possible modification based on the present utility model, and such should be considered to be within the scope of the present utility model. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to reduce the degree of crystallization formed in the second filtering unit and to combine the filtering units at the same time, thereby reducing the number of all the filter elements in the water purifying device, a filter element is proposed in the present utility model, fig. 1 is a schematic diagram of a filter element mounted on a waterway plate of the water purifying device in an embodiment of the present utility model, fig. 2 is a sectional structure diagram of a filter element mounted on a waterway plate of the water purifying device in an embodiment of the present utility model, fig. 3 is a partial sectional structure diagram of a filter element in an embodiment of the present utility model, fig. 4 is an exploded view of a filter element without a housing in an embodiment of the present utility model, and as shown in fig. 1 to 4, the filter element may include: a housing 1; a raw water inlet 21; a waste water outlet 22; a purified water outlet 23; a first filter unit 3, a second filter unit 4, and a scale inhibitor release member 5 capable of releasing a scale inhibitor, which are disposed in the housing 1, the scale inhibitor release member 5 being disposed outside the second filter unit 4; the raw water inlet 21 is communicated with the raw water end of the second filtering unit 4, the waste water end of the second filtering unit 4 is communicated with the waste water outlet 22, and the clean water end of the second filtering unit 4 is communicated with the clean water outlet 23; the scale inhibiting substance releasing member 5 is located upstream of the raw water end of the second filtering unit 4 such that water flowing in from the raw water inlet 21 flows through the scale inhibiting substance releasing member 5 and then enters the raw water end of the second filtering unit 4; the first filter unit 3 is located upstream of the raw water end of the second filter unit 4 such that water flowing in from the raw water inlet 21 flows through the scale inhibiting substance releasing member 5 and the first filter unit 3 and then enters the raw water end of the second filter unit 4; alternatively, the first filter unit 3 is located downstream of the water purifying end of the second filter unit 4 such that the purified water flowing out of the water purifying end of the second filter unit 4 passes through the first filter unit 3 and then enters the purified water outlet 23.

In the filter cartridge of the present application, raw water flows in from the raw water inlet 21, first flows through the scale inhibiting substance releasing member 5 provided outside the second filter unit 4, and the scale inhibiting substance releasing member 5 releases the scale inhibiting substance, so that the raw water is carried with the scale inhibiting substance, and then enters the second filter unit 4 from the raw water end of the second filter unit 4 for filtration, waste water formed by filtration in the second filter unit 4 flows out from the waste water end and then is discharged from the waste water outlet 22, and purified water formed by filtration in the second filter unit 4 flows out from the purified water end and is discharged from the purified water outlet 23. Since the raw water carries the scale inhibiting substances, the raw water is not easy to crystallize on the surface of the filtering membrane of the second filtering unit 4, and thus the filtering performance and the service life of the second filtering unit 4 can be improved. When the first filter unit 3 is located upstream of the raw water end of the second filter unit 4, the water flowing in from the raw water inlet 21 may flow through the scale-inhibiting substance releasing member 5 and the first filter unit 3 and then enter the raw water end of the second filter unit 4; when the first filter unit 3 is located downstream of the water purifying end of the second filter unit 4, the purified water flowing out of the water purifying end of the second filter unit 4 may be filtered by the first filter unit 3 and then discharged from the purified water outlet 23. Through the mode, the filter element can enable the first filter unit 3 and the second filter unit 4 to be arranged in one filter element in a combined mode, and meanwhile, the filter element has a scale inhibition function, so that the integration degree of the filter element can be improved, the number of all filter elements in the water purifying device and the occupied volume of all filter elements can be reduced, and the water purifying device is miniaturized. In addition, since the scale inhibiting substance releasing member 5 is provided outside the second filter unit 4, the length of the filter element in the axial direction can be effectively reduced.

The cartridge of the present utility model will be further explained and illustrated below in order to provide a better understanding of the cartridge. As shown in fig. 1 to 4, the cartridge may include a housing 1; a raw water inlet 21; a waste water outlet 22; a purified water outlet 23; a first filter unit 3, a second filter unit 4, and a scale-inhibiting substance releasing member 5 capable of releasing a scale-inhibiting substance, which are provided in the housing 1. Wherein the housing 1 is adapted to accommodate the first filter unit 3, the second filter unit 4 and the scale inhibiting substance releasing member 5. The raw water inlet 21 is used for inputting raw water into the housing 1, the waste water outlet 22 is used for discharging waste water formed by the second filtering unit 4 in the housing 1 out of the housing 1, and the purified water outlet 23 is used for discharging purified water formed by the second filtering unit 4 in the housing 1 out of the housing 1.

The scale inhibitor release member 5 is provided with a scale inhibitor, and the scale inhibitor release member 5 is arranged outside the second filter unit 4, for example, is sleeved outside the second filter unit 4. When the raw water flows through the scale inhibiting substance releasing member 5, the scale inhibiting agent in the scale inhibiting substance releasing member 5 can release the scale inhibiting substance in the raw water, and the raw water carrying the scale inhibiting substance can flow into the second filtering unit 4 for filtering.

As a possible implementation, fig. 5 is a schematic structural diagram of a scale inhibitor releasing member according to an embodiment of the present utility model, and as shown in fig. 5, the scale inhibitor releasing member 5 may include a body having scale inhibitor particles. The body can be generally in a circular tube shape, and the body is provided with a hollow structure so that water can flow into the inner side from the outer side of the scale inhibiting substance release member 5. The scale inhibitor may be mixed in the form of particles in the body. For example, the granular scale inhibitor is mixed in the manufacturing material of the body when the body is manufactured, for example, the body can be made of plastic materials, the granular scale inhibitor is added and mixed together when the plastic materials are melted, the granular scale inhibitor is always kept in the granular state, and thus the granular scale inhibitor can be mixed in the body when the plastic materials form the body. When the raw water can flow from the outside of the scale inhibitor releasing member 5 to the inside, the scale inhibitor particles in the body can release the scale inhibitor into the raw water. The scale inhibitor may be phosphate particles, but of course, other types of scale inhibitors may be used, and are not limited in this utility model. The structure of the scale inhibiting substance releasing member 5 can be simplified maximally in the above manner, and the occupied space is reduced, so that the volume of the filter element is further reduced.

The second filtering unit 4 is used for fine filtering raw water. For example, the second filter unit 4 needs to form wastewater while forming purified water when filtering raw water. The second filter unit 4 has a raw water end from which raw water flows into the second filter unit 4, a waste water end from which formed purified water flows out of the second filter unit 4, and a purified water end from which formed waste water flows out of the second filter unit 4. As a possible possibility, the second filtering unit 4 comprises at least one of the following: RO membrane filtration units, nanofiltration membrane filtration units, ultrafiltration membrane filtration units, and the like.

As shown in fig. 2, the raw water inlet 21 communicates with the raw water end of the second filter unit 4, the waste water end of the second filter unit 4 communicates with the waste water outlet 22, and the clean water end of the second filter unit 4 communicates with the clean water outlet 23. The scale inhibiting substance releasing member 5 is located upstream of the raw water end of the second filter unit 4 such that water flowing in from the raw water inlet 21 flows through the scale inhibiting substance releasing member 5 and then enters the raw water end of the second filter unit 4.

In one possible embodiment, as shown in fig. 2 to 4, the first filtering unit 3 may be located upstream of the raw water end of the second filtering unit 4 such that the water flowing in from the raw water inlet 21 flows through the scale-inhibiting substance releasing member 5 and the first filtering unit 3 and then enters the raw water end of the second filtering unit 4. In this embodiment, the first filtering unit 3 may be a pre-filtering unit, the specific kind of which is not limited. For example, the first filter unit 3 may comprise a PP cotton filter unit. Alternatively, the first filter unit 3 may include activated carbon. Alternatively, the first filter unit 3 includes both PP cotton filter unit and activated carbon.

In another possible embodiment, the first filter unit 3 is located downstream of the clean water end of the second filter unit 4, such that the clean water flowing out of the clean water end of the second filter unit 4 passes through the first filter unit 3 and then into the clean water outlet 23. In this embodiment, the first filtering unit 3 may be a post-filtering unit, and the specific kind thereof is not limited. For example, the first filter unit 3 may be made of an activated carbon material.

As a possibility, the filter cartridge may have an axial direction and a radial direction in which the scale inhibiting substance releasing member 5 is provided outside the second filter unit 4. In this way, the dimension of the filter element in the axial direction can be effectively reduced, and at the same time, after entering the raw water inlet 21, water can flow through the scale inhibiting substance releasing member 5 in the circumferential direction before flowing to the raw water end of the second filtering unit 4, so that the contact degree of the water and the scale inhibiting substance releasing member 5 can be greatly increased, and the concentration of the scale inhibiting substance released by the scale inhibiting substance releasing member 5 in the water can be ensured. In addition, the water does not need to be additionally circulated to reach the scale inhibitor releasing member 5.

As a possibility, as shown in fig. 2 to 4, when the first filter unit 3 is located upstream of the raw water end of the second filter unit 4 in the radial direction of the filter cartridge, the scale-inhibiting substance releasing member 5, the first filter unit 3, the second filter unit 4 are arranged in this order from outside to inside, or the first filter unit 3, the scale-inhibiting substance releasing member 5, the second filter unit 4 are arranged in this order from outside to inside.

As a practical matter, any one of the outer sidewall, the inner sidewall, the upper end and the lower end of the second filter unit 4 may be a raw water end of the second filter unit 4, any one of the remaining outer sidewall, the inner sidewall, the upper end and the lower end of the second filter unit 4 may be a waste water end of the second filter unit 4, and any one of the remaining outer sidewall, the inner sidewall, the upper end and the lower end of the second filter unit 4 may be a purified water end of the second filter unit 4.

Further, fig. 6 is a schematic water flow diagram of the second filter unit of the embodiment of the present utility model after the filter membrane is expanded and matched with the central tube, as shown in fig. 2 to 4 and fig. 6, the outer side wall of the second filter unit 4 may be the raw water end of the second filter unit 4, the inner side wall of the second filter unit 4 may be the water purifying end of the second filter unit 4, and the upper end and/or the lower end of the second filter unit 4 may be the waste water end of the second filter unit 4. In this embodiment, the water after being filtered by the first filtering unit 3 flows out from the inner side wall of the first filtering unit 3 and then directly flows into the second filtering unit 4 through the outer side wall of the second filtering unit 4, so that the flow channel can be greatly simplified, and the filter element structure is simpler.

As a possibility, the first filter unit 3 may be arranged outside the second filter unit 4. If the first filter unit 3 can be directly sleeved outside the second filter unit 4, the two filter units are two independent components. At this time, the scale inhibiting substance releasing member 5 may be disposed outside the first filter unit 3, or the scale inhibiting substance releasing member 5 may be disposed outside the second filter unit 4 between the second filter unit 4 and the first filter unit 3. For another example, the first filter unit 3 may be directly formed at the outer sidewall of the second filter unit 4, and the first filter unit 3 and the second filter unit 4 may be integrally constructed, and when the first filter unit 3 is a PP cotton filter unit, the first filter unit 3 may be melt-blown on the outer sidewall of the second filter unit 4. Therefore, the number of parts can be reduced, and the assembly is convenient. For another example, the first filter unit 3 may be wound around the outer side wall of the second filter unit 4, specifically, when the first filter unit 3 is a PP cotton filter unit, the PP cotton in a layered state may be wound around the outer side wall of the second filter unit 4, or the PP cotton in a layered state may be connected to the end of the filter membrane in the second filter unit 4, and after the filter membrane is wound to form a tubular structure, the two filter units are continuously wound around the outside of the second filter unit 4, and at this time, the two filter units are in an integral structure. Also, the number of parts can be reduced through the mode, and the assembly is convenient. At this time, the scale inhibiting substance releasing member 5 may be disposed outside the first filter unit 3.

When the first filter unit 3 is positioned downstream of the water purifying end of the second filter unit 4, the second filter unit 4 and the first filter unit 3 are sequentially arranged from outside to inside. In the above-described several structures, the second filter unit 4 and the first filter unit 3 may be sleeved therebetween as possible.

As a possible possibility, as shown in fig. 2 to 4, the cartridge may comprise: a first end cap 12 provided at the end of the first filter unit 3 and the second filter unit 4. A partial water inlet channel is formed between the first end cap 12 and the housing 1. When the scale inhibiting substance release member 5, the first filtering unit 3 and the second filtering unit 4 are sequentially arranged from outside to inside, a part of water inlet channels are formed between the outer side wall of the scale inhibiting substance release member 5 and the inner side wall of the shell 1; the raw water inlet 21 is communicated with the raw water end of the second filtering unit 4 through a water inlet channel, and the scale inhibiting substance releasing member 5 is positioned in the water inlet channel.

When the first filter unit 3 is a pre-filter unit, as shown in fig. 2 and 3, the first end cap 12 may be used to close the end of the first filter unit 3, preventing raw water from penetrating from the end of the first filter unit 3 to the raw water end of the second filter unit 4 without passing through the first filter unit 3. As a possibility, the first end cap 12 may be used to close a part of the end of the second filter unit 4, thereby isolating the raw water end and the waste water end of the second filter unit 4, preventing water to be introduced into the raw water end from being mixed with waste water discharged from the waste water end.

As a possibility, as shown in fig. 2, the cartridge may comprise: and a third end cap 10. The third end cap 10 is used for sealing the end of the first filtering unit 3 and the second filtering unit 4 away from the waste water end, so as to prevent raw water from penetrating from the end parts of the first filtering unit 3 and the second filtering unit 4 to the raw water end of the second filtering unit 4 and the water purifying end of the second filtering unit 4 without passing through the first filtering unit 3 and the second filtering unit 4. Of course, the third end cap 10 may not completely seal the end of the second filter unit 4 remote from the waste water end (upper end of the second filter unit 4) such that the end of the second filter unit 4 remote from the waste water end (lower end of the second filter unit 4) at least partially forms the waste water end.

As a possible possibility, as shown in fig. 2 to 4, the cartridge may comprise: a third filter unit 6 disposed within the housing 1. When the first filter unit 3 is a pre-filter unit, the third filter unit 6 is a post-filter unit. The third filter unit 6 may be made of an activated carbon material, for example the third filter unit 6 may take the form of a carbon rod. When the first filter unit 3 is a post-filter unit, the third filter unit 6 is a pre-filter unit. Through the structure, the filter element combines the three different types of filter units and the scale inhibiting substance release piece 5 into the same filter element, so that the integration level of the filter element can be improved to the greatest extent, the number of all filter elements in the water purifying device and the occupied volume of all filter elements are reduced, and the water purifying device is further miniaturized.

As a possibility, as shown in fig. 2 to 4, when the third filter unit 6 is a rear filter unit, the water inlet portion of the third filter unit 6 communicates with the water purifying end of the second filter unit 4, and the water outlet portion of the third filter unit 6 communicates with the water purifying outlet 23. The end of the third filter unit 6 is provided with a second end cap assembly 7, and a first water outlet channel 71 is formed in the second end cap assembly 7. The third filter unit 6 has a tubular shape, and has a second water outlet passage 61 formed therein to communicate with the first water outlet passage 71. A wastewater outlet channel 8 is formed between the first end cover 12 and the second end cover assembly 7, and the wastewater end of the second filtering unit 4 is communicated with a wastewater outlet 22 through the wastewater outlet channel 8. The outer sidewall of the third filter unit 6 may be a water inlet portion, and the inner sidewall of the third filter unit 6 may be a water outlet portion. For example, the purified water flowing out from the inner side wall of the second filter unit 4 may directly enter the third filter unit 6 through the outer side wall of the third filter unit 6, and after being sufficiently filtered, flow out from the inner side wall of the third filter unit 6. The purified water outlet 23 communicates with the water outlet portion of the third filter unit 6 through the first water outlet passage 71 and the second water outlet passage 61.

As a possibility, as shown in fig. 2 to 4, the first end cap 12 includes a first body portion 121 extending in the radial direction, and a first connecting portion 122 extending in the axial direction at a middle portion of the first body portion 121. The second end cap assembly 7 includes a second body portion 73 extending in the radial direction, and a second connecting portion 72 extending in the axial direction at a middle portion of the second body portion 73. The second connecting portion 72 passes through the first connecting portion 122, a part of the wastewater outlet channel 8 is formed between the inner side wall of the first connecting portion 122 and the outer side wall of the second connecting portion 72, and a part of the wastewater outlet channel 8 is formed between the first body portion 121 and the second body portion 73. With the above-described structure, the waste water discharged from the waste water end of the second filter unit 4 can be discharged from the part of the waste water outlet passage 8 formed between the inner side wall of the first connecting portion 122 and the outer side wall of the second connecting portion 72.

In order to facilitate the filter element to be mounted on the water purifying device, the raw water inlet 21, the waste water outlet 22 and the purified water outlet 23 of the filter element are in butt joint with corresponding flow channels on the water purifying device, fig. 7 is a perspective view of a water path connecting member in an embodiment of the present utility model, fig. 8 is a cross-sectional structural view of the water path connecting member in an embodiment of the present utility model, and as shown in fig. 2, 3, 7 and 8, the housing 1 may have a port 11, and the filter element includes: the water path connecting piece 2 is arranged at the port 11, the water path connecting piece 2 is provided with a raw water inlet 21, a waste water outlet 22 and a purified water outlet 23, and the water path connecting piece 2 is provided with a first annular extension part 24 and a second annular extension part 25 from outside to inside. The cartridge may be mounted to the waterway plate 200 of the water purifying device through the waterway connector 2. The first connecting portion 122 enters the first annular extension 24, and the outer side wall of the first connecting portion 122 is sealed from the inner side wall of the first annular extension 24. The second connecting portion 72 enters the second annular extension 25, and the outer side wall of the second connecting portion 72 is sealed from the inner side wall of the second annular extension 25.

With the above structure, the raw water inlet 21 communicates with the water inlet portion of the first filtering unit 3 through the water inlet passage outside the first annular extension 24; the waste water outlet 22 communicates with the waste water end of the second filter unit 4 via a gap between the first 24 and second 25 annular extensions, the waste water outlet channel 8; the clean water outlet 23 communicates with the water outlet of the third filter unit 6 through the first water outlet channel 71 inside the second annular extension 25.

As a possible possibility, as shown in fig. 2 to 4, the cartridge may comprise: the central tube 9, the second filter unit 4 is wound or sleeved outside the central tube 9. The central tube 9 may support the filter membrane of the second filter unit 4. The central tube 9 is provided with a communication hole 91 for communicating the water purifying end of the second filter unit 4 with the inside of the central tube 9. The inside of the central tube 9 is communicated with a purified water outlet 23. The purified water discharged from the purified water end of the second filtering unit 4 passes through the communication hole 91 of the center tube 9 and then enters the inside of the center tube 9. The purified water entering the inside of the central tube 9 can be discharged from the purified water outlet 23.

The third filter unit 6 may be disposed in the central tube 9, or the third filter unit 6 may not be disposed. When the third filter unit 6 is arranged in the central tube 9, the water inlet of the third filter unit 6 is communicated with the water purifying end of the second filter unit 4, and the water outlet of the third filter unit 6 is communicated with the water purifying outlet 23. The purified water discharged from the purified water end of the second filtering unit 4 passes through the communication hole 91 of the central tube 9, enters the central tube 9, is filtered by the third filtering unit 6, and is discharged from the purified water outlet 23.

As a possibility, as shown in fig. 2, the end of the central tube 9 away from the purified water outlet 23 is in a blocking state, and the other end of the central tube 9 near the purified water outlet 23 is opened, so that the third filter unit 6 can be installed in the central tube 9. Of course, the end of the central tube 9 away from the purified water outlet 23 may be opened, and water flowing into the central tube 9 may be discharged from the upper end to the housing 1 or from the lower end to the housing 1.

As a practical matter, the second end cap assembly 7 may include a first sub-end cap 74 and a second sub-end cap 75, as shown in fig. 2 and 3. The first sub-end cap 74 plugs the other end of the central tube 9. The first sub cap 74 has a third extension 741 having a ring shape extending in the direction of the second sub cap 75 and a second connection 72 extending in the axial direction. A second sub-end cap 75 is provided at the end of the third filter unit 6, the second sub-end cap 75 and the first sub-end cap 74 cooperating to isolate the outer and inner side walls of the third filter unit 6. The second sub cap 75 has a fourth extension 751 having a ring shape extending in the direction of the first sub cap 74, and the fourth extension 751 is inserted into the third extension 741. The water flowing out from the water outlet of the third filtering unit 6 flows to the purified water outlet after passing through the second sub-end cover 75 and the first sub-end cover 74 in sequence.

Because the second connecting portion 72 of the second end cover assembly 7 is inserted into the waterway connector 2, the second end cover assembly 7 is difficult to move slightly, and because the third filter unit 6 has a long length, the filter element is easy to break during transportation or when being subjected to impact vibration, and especially when the third filter unit is a carbon rod, the filter element is relatively fragile. By inserting the fourth extension 751 into the third extension 741, a slight movement can be made relative to the first sub-end cap 74 and the second sub-end cap 75 in the second end cap assembly 7, which reduces the likelihood of breakage of the third filter unit 6.

Further, as shown in fig. 2 and 3, the outer side wall of the third extension 741 is sealed to the inner side wall of the center tube 9. The inner side wall of the third extension part 741 and the outer side wall of the fourth extension part 751 are sealed by a sealing ring. By the seal ring between the third extension part 741 and the fourth extension part 751, the impact force applied to the third filter unit 6 can be further reduced when the filter cartridge is subjected to impact vibration, thereby further reducing the possibility of breakage of the third filter unit 6.

The application also provides a water purifying device which comprises the filter element of any one of the above.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

The foregoing description of the embodiments of the present utility model is merely illustrative, and the present utility model is not limited to the embodiments described above. Any person skilled in the art can make any modification and variation in form and detail of the embodiments without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims (21)

1. A filter cartridge, the filter cartridge comprising:

a housing; a raw water inlet; a waste water outlet; a purified water outlet;

the scale inhibition device comprises a first filtering unit, a second filtering unit and a scale inhibition material release piece, wherein the first filtering unit, the second filtering unit and the scale inhibition material release piece are arranged in the shell, and the scale inhibition material release piece is arranged outside the second filtering unit;

the raw water inlet is communicated with the raw water end of the second filtering unit, the waste water end of the second filtering unit is communicated with the waste water outlet, and the purified water end of the second filtering unit is communicated with the purified water outlet; the scale inhibiting substance releasing member is located upstream of the raw water end of the second filtering unit so that water flowing in from the raw water inlet flows through the scale inhibiting substance releasing member and then enters the raw water end of the second filtering unit;

The first filter unit is positioned upstream of the raw water end of the second filter unit, so that water flowing in from the raw water inlet flows through the scale inhibiting substance release member and the first filter unit and then enters the raw water end of the second filter unit; or the first filtering unit is positioned downstream of the water purifying end of the second filtering unit, so that the purified water flowing out of the water purifying end of the second filtering unit passes through the first filtering unit and then enters the purified water outlet.

2. The filter cartridge of claim 1, wherein the second filter unit comprises at least one of: RO membrane filtration unit, nanofiltration membrane filtration unit, ultrafiltration membrane filtration unit.

3. The filter cartridge of claim 1, wherein the first filter unit comprises a PP cotton filter unit when the first filter unit is located upstream of a raw water end of the second filter unit;

when the first filter unit is located downstream of the water purifying end of the second filter unit, the first filter unit is made of an activated carbon material.

4. The filter cartridge of claim 1, wherein the scale inhibitor release member comprises a body having scale inhibitor particles thereon having a hollowed-out structure to allow water to flow from the outside of the scale inhibitor release member to the inside.

5. The filter cartridge of claim 1, wherein the filter cartridge has a radial direction in which the scale-inhibiting substance releasing member, the first filter unit, the second filter unit are sequentially arranged from outside to inside, or the first filter unit, the scale-inhibiting substance releasing member, the second filter unit are sequentially arranged from outside to inside when the first filter unit is located upstream of the raw water end of the second filter unit.

6. The filter cartridge of claim 5, wherein the filter cartridge further comprises: a first end cap disposed at an end of the first filter unit and the second filter unit; a partial water inlet channel is formed between the first end cover and the shell; when the scale inhibiting substance release piece, the first filtering unit and the second filtering unit are sequentially arranged from outside to inside, a part of water inlet channel is formed between the outer side wall of the scale inhibiting substance release piece and the inner side wall of the shell; the raw water inlet is communicated with the raw water end of the second filtering unit through the water inlet channel, and the scale inhibiting substance release piece is positioned in the water inlet channel.

7. The filter cartridge of claim 6, wherein the filter cartridge further comprises: the water inlet part of the third filtering unit is communicated with the water purifying end of the second filtering unit, and the water outlet part of the third filtering unit is communicated with the water purifying outlet;

a second end cover component is arranged at the end part of the third filtering unit; a waste water outlet channel is formed between the first end cover and the second end cover assembly, and the waste water end of the second filtering unit is communicated with the waste water outlet through the waste water outlet channel; and a first water outlet channel is formed in the second end cover assembly, and the purified water outlet is communicated with the water outlet part of the third filtering unit through the first water outlet channel.

8. The filter cartridge of claim 7, wherein the first end cap includes a first body portion extending in a radial direction, a first connecting portion extending in an axial direction in a middle portion of the first body portion; the second end cover assembly comprises a second body part extending along the radial direction and a second connecting part located in the middle of the second body part and extending along the axial direction, the second connecting part penetrates through the first connecting part, a part of wastewater outlet channel is formed between the inner side wall of the first connecting part and the outer side wall of the second connecting part, and a part of wastewater outlet channel is formed between the first body part and the second body part.

9. The filter cartridge of claim 8, wherein the housing has a port; the filter cartridge includes: the waterway connecting piece is arranged at the port and is provided with the raw water inlet, the waste water outlet and the purified water outlet, and the waterway connecting piece is sequentially provided with a first annular extending part and a second annular extending part from outside to inside; the first connecting part enters the first annular extending part, and the outer side wall of the first connecting part is sealed with the inner side wall of the first annular extending part; the second connecting part enters the second annular extending part, and the outer side wall of the second connecting part is sealed with the inner side wall of the second annular extending part;

the raw water inlet is communicated with the water inlet part of the first filtering unit through the outer side of the first annular extension part and the water inlet channel; the waste water outlet is communicated with the waste water end of the second filtering unit through a gap between the first annular extension part and the second annular extension part and the waste water outlet channel; the purified water outlet is communicated with the water outlet part of the third filtering unit through the inside of the second annular extension part and the first water outlet channel.

10. The filter cartridge of claim 7, wherein the third filter unit is tubular in shape, and has an interior defining a second water outlet passage in communication with the first water outlet passage; the purified water outlet is communicated with the water outlet part of the third filtering unit through the first water outlet channel and the second water outlet channel.

11. The filter cartridge of claim 5, wherein the filter cartridge comprises: the second filtering unit is wound or sleeved outside the central tube; the central pipe is provided with a communication hole which enables the water purifying part of the second filtering unit to be communicated with the inside of the central pipe; the inside of the central tube is communicated with the purified water outlet.

12. The filter cartridge of claim 11, wherein the filter cartridge further comprises: a third filter unit disposed within the housing, the third filter unit disposed within the center tube; the water inlet part of the third filtering unit is communicated with the water purifying end of the second filtering unit, and the water outlet part of the third filtering unit is communicated with the water purifying outlet.

13. The filter cartridge of claim 12, wherein an end of the central tube remote from the clean water outlet is in a plugged state, and the other end of the central tube adjacent to the clean water outlet is in an open state; the end part of the third filtering unit is provided with a second end cover assembly, and the second end cover assembly is used for plugging the other end of the central tube.

14. The filter cartridge of claim 13, wherein the second end cap assembly comprises a first sub-end cap and a second sub-end cap, the first sub-end cap sealing off the other end of the center tube, the first sub-end cap having a third extension in the shape of a ring extending in the direction of the second sub-end cap, a third connection extending in the axial direction,

the second sub end cover is arranged at the end part of the third filtering unit and is provided with a fourth extension part which extends towards the direction of the first sub end cover and is in an annular shape, and the fourth extension part is inserted into the third extension part; and water flowing out of the water outlet part of the third filtering unit sequentially passes through the second sub end cover and the first sub end cover and then flows to the purified water outlet.

15. The cartridge of claim 14, wherein an outer sidewall of the third extension is sealed to an inner sidewall of the center tube; the inner side wall of the third extension part and the outer side wall of the fourth extension part are sealed through a sealing ring.

16. A filter cartridge according to claim 7 or 12, wherein the third filter unit is made of an activated carbon material.

17. The filter cartridge of claim 5, wherein a raw water end of the second filter unit is located on an outer sidewall of the second filter unit, a waste water end of the second filter unit is located on an end of the second filter unit, and a purified water end of the second filter unit is located on an inner sidewall of the second filter unit.

18. The filter cartridge of claim 17, wherein the first filter unit is nested outside the second filter unit when the scale inhibiting substance releasing member, the first filter unit, and the second filter unit are sequentially arranged from outside to inside;

or,

the first filter unit is directly formed at the outer side wall of the second filter unit, and the first filter unit and the second filter unit are of an integrated structure.

19. The filter cartridge of claim 4, wherein the scale inhibitor particles comprise phosphate particles.

20. The filter cartridge of claim 17, wherein the filter cartridge further comprises: and the third end cover is used for sealing one end, far away from the wastewater end, of the first filtering unit and the second filtering unit.

21. A water purification apparatus, comprising: a filter cartridge according to any one of claims 1 to 20.