CN108211505A - Filter core, filter assemblies and household electrical appliance - Google Patents

Abstract

The invention provides a filter element, a filter assembly and a household appliance, wherein the filter element includes: a barrel body; a filter element head, a cover is arranged on the barrel body to form a cavity; a filter medium is arranged in the cavity; the filter medium includes: an inner layer medium , the inner layer medium is provided with through holes along the axial direction; the multi-layer outer layer medium is sheathed outside the inner layer medium; wherein, the density of the multi-layer outer layer medium increases layer by layer from the outside to the inside. In the filter element proposed by the present invention, the filter medium is placed in the cavity formed by the fastening of the barrel body and the filter head, and the outer layer medium of the filter medium is set to be multi-layered, and the density of the multi-layer outer layer medium is gradually increased from the outside to the inside. Layers increase, so that the area of the filter holes of the multi-layer outer media decreases layer by layer from the outside to the inside, and then the filter media filters the liquid and filters the impurities layer by layer, enhancing the dirt-holding capacity of the filter element, and avoiding large particles of impurities from clogging the small filter The holes can effectively delay the attenuation of the flow rate of the filter element and improve the life of the filter medium.

Description

Filter elements, filter components and household appliances

technical field

The invention relates to the technical field of water purification, in particular to a filter element, a filter assembly and a household appliance.

Background technique

At present, the filter elements of the refrigerators on the market mainly use carbon rods as the filter medium to remove particulate matter and organic substances in the water. This single filter medium generally has a problem, that is, the filter element has a short service life and is easy to block, resulting in the filter element being used for a period of time. After time, the water flow speed becomes slower and slower. When the flow rate drops to a certain level, the filter element needs to be replaced. In related technologies, in order to improve the life of the filter element, PP cotton filter element + carbon rod filter element or PP cotton filter element + ultrafiltration filter element are usually used +Combination of multiple filter elements such as carbon rod filter elements to solve the blockage problem of the water treatment system in the refrigerator. This combination of multiple filter elements can indeed prolong the life of the filter element and slow down the flow rate attenuation of the filter element. However, this water supply treatment system is complex and It takes up a lot of space and affects the refrigeration volume of the refrigerator.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

To this end, the embodiment of the first aspect of the present invention provides a filter element.

The embodiment of the second aspect of the present invention provides a filter assembly.

The embodiment of the third aspect of the present invention provides a household appliance.

In view of this, according to the embodiment of the first aspect of the present invention, the present invention proposes a filter element, including: a barrel body; a filter element head, a cover is arranged on the barrel body to form a cavity; a filter medium is arranged in the cavity; a filter medium It includes: an inner layer medium, the inner layer medium is provided with through holes along the axial direction; a multi-layer outer layer medium is sleeved outside the inner layer medium; wherein, the density of the multi-layer outer layer medium increases layer by layer from the outside to the inside.

In the filter element proposed by the present invention, the filter medium is placed in the cavity formed by the fastening of the barrel body and the filter element head, and the outer layer medium of the filter medium is set to be multi-layered, and the density of the multi-layer outer layer medium is gradually increased from the outside to the inside. Layers increase, so that the area of the filter holes of the multi-layer outer media decreases layer by layer from the outside to the inside, and then the filter media is filtering the liquid, filtering impurities layer by layer, enhancing the dirt-holding capacity of the filter element, and preventing large particles of impurities from clogging the small filter The holes can effectively delay the attenuation of the flow rate of the filter element and improve the life of the filter medium.

In addition, the filter element in the above embodiment provided by the present invention can also have the following additional technical features:

In the above technical solution, preferably, the inner layer medium is made of carbon powder, ultra-high molecular weight polyethylene and at least one of the following materials: metal chelating agent, silver-loaded antibacterial agent.

In this technical solution, the impurities in the liquid are filtered and purified by carbon powder, the liquid is bacteriostatically treated by a silver-loaded antibacterial agent, and the heavy metals in the liquid are removed by a metal chelating agent for heavy metals to improve the purification of the liquid The rate ensures the safety of the liquid.

In any of the above technical solutions, preferably, when the inner medium contains carbon powder, ultra-high molecular weight polyethylene, metal chelating agent, and silver-loaded antibacterial agent, the carbon powder accounts for 50% to 80%; Polyethylene accounts for 15% to 35%; metal chelating agents account for 0.1% to 10%; silver-loaded antibacterial agents account for 0.1% to 10%.

In this technical solution, by reasonably controlling the composition of the inner layer medium, while ensuring its filtering effect, its cost can also be reduced.

In any of the above technical solutions, preferably, the outer layer of medium is curled into a smooth annular structure; or the outer layer of medium is folded into a wrinkled annular structure.

In this technical solution, by curling the outer medium into a smooth ring structure, multiple layers of outer medium are sheathed layer by layer to form a ring structure, which reduces the thickness of the outer medium and improves the filtering effect on liquids; Or by setting the outer layer medium with a pleated structure, the filtering area of the outer layer medium is increased, and the filtering efficiency of the liquid is improved.

In any of the above technical solutions, preferably, the material of the multi-layer outer layer medium is PP cotton.

In this technical solution, PP cotton is used to ensure the filtering effect on liquid, and PP cotton is cheap, easy to manufacture, and easy to control in density, and it is easy to make a multi-layer outer layer medium with progressive filtering degree.

In any of the above technical solutions, preferably, both the inner medium and the outer medium are cylindrical.

In this technical solution, the cylindrical outer layer medium and the inner layer medium save more space, and ensure the filtering capacity of the liquid.

In any of the above technical solutions, preferably, it also includes: a first end cover, installed on the end of the filter medium facing the filter head, forming a gap with the side wall of the bucket body, and the first end cover is provided with a first water outlet pipe; The two end caps are installed on the other end of the filter medium and are located in the cavity.

In this technical solution, through the cooperation of the first end cover and the filter head, the raw water flow flows into the barrel body from the gap between the first end cover and the barrel body, and the purified water filtered layer by layer from the outside of the filter medium flows from the inside The through hole on the layer medium flows out through the first outlet pipe on the first end cover to realize the effective isolation of raw water and purified water and ensure the filtering effect, and is supported by the second end cover at the bottom of the filter medium to ensure the installation position of the filter medium .

In any of the above technical solutions, preferably, it further includes: a pearl cotton pad, the pad is arranged at the other end of the second end cover, and is located at the bottom of the cavity.

In this technical solution, good flexible support is provided by pearl cotton, and a good water-proof effect is provided to ensure the installation position of the filter medium in the barrel body, and to ensure that water enters the through hole in the filter medium from the surrounding side of the filter medium, ensuring Water purification effect.

In any of the above technical solutions, preferably, the filter element head is protrudingly provided with a second water outlet pipe, and the second water outlet pipe is adapted to the first water outlet pipe; the filter element head is provided with a water inlet pipe surrounding the second water outlet pipe; wherein, A sealing member is arranged between the second water outlet pipe and the second water outlet pipe.

In this technical solution, through the cooperation of the second water outlet pipe arranged on the filter element head and the first water outlet pipe, the raw water is introduced into the inside of the barrel, and by setting the water inlet pipe around the second water outlet pipe, the size of the filter element is reduced. The volume of the head makes the filter element more compact.

In any of the above technical solutions, preferably, the filter head is provided with a first connecting portion.

In this technical solution, a first connecting portion is provided on the filter head so as to connect the filter head with an external waterway system.

According to the second embodiment of the present invention, the present invention proposes a filter assembly, including: the filter element described in any one of the above technical solutions; and the filter element socket, adapted to the filter element; wherein, the filter element of the filter element A first connection part is arranged on the head; a second connection part matched with the first connection part is arranged on the filter element seat.

In the filter assembly proposed by the present invention, the filter element socket is installed on the water system of the household appliance, and the filter element and the filter element socket are installed together through the first connection part and the second connection part, so that the fast and reliable installation of the filter element and the filter element socket is realized , and, because the filter assembly proposed by the present invention includes the filter element described in any one of the above technical solutions, it has all the beneficial effects of the filter element described in any one of the above technical solutions, which will not be repeated here a statement.

In the above technical solution, preferably, it also includes: the filter element socket includes: a filter element joint, the filter element joint is provided with a first groove, and a second groove sunken at the bottom of the first groove; the pipeline structure is arranged on the filter element On the side of the joint, the pipeline structure is provided with a water inlet channel and a water outlet channel, the water inlet channel is connected to the first groove, and the water outlet channel is connected to the second groove; wherein, the second groove is compatible with the second outlet pipe Matching, the first groove communicates with the water inlet pipe.

In this technical solution, by rationally arranging the water channel in the filter element socket and adopting the first groove and the second groove with a stepped structure, the filter element socket can maintain a small volume and save the occupied space of the filter assembly.

In any of the above technical solutions, preferably, sealing members are provided between the side wall of the second groove and the second water outlet pipe, and between the side wall of the first groove and the water inlet pipe.

In this technical solution, a sealing member is provided between the side wall of the second groove and the second water outlet pipe, and between the side wall of the first groove and the water inlet pipe to ensure complete isolation of raw water and clean water, ensuring Water purification effect.

In any of the above technical solutions, preferably, the water inlet channel and the water outlet channel are arranged in parallel in the pipeline structure.

In this technical solution, by arranging the water inlet channel and the water outlet channel side by side in the pipeline structure, the water inlet channel and the water outlet channel of the filter assembly are located on the same side of the filter element socket, occupying a small space, and only a single The pipeline structure reduces the difficulty of installing the filter element joint on the main body of the household appliance.

According to the third embodiment of the present invention, the present invention proposes a household appliance, including: a main body of the household appliance; and a filter element as described in any one of the above technical solutions; or as described in any one of the above technical solutions filter assembly; wherein, the filter socket is installed in the water system of the main body of the household appliance.

The household appliance proposed by the present invention includes the filter element as described in any one of the above-mentioned technical solutions, or the filter assembly as described in any one of the above-mentioned technical solutions, therefore, it has the following advantages: The filter element, or all the beneficial effects of the filter assembly described in any one of the above technical solutions, will not be stated one by one here.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 shows a schematic structural view of a filter element provided by an embodiment of the present invention;

Fig. 2 shows a schematic structural view of a filter medium in a filter element provided by an embodiment of the present invention;

Fig. 3 shows a schematic structural view of a filter medium in a filter element provided by another embodiment of the present invention.

Figure 4 shows a schematic structural view of a filter assembly provided by an embodiment of the present invention;

Figure 5 shows an exploded view of the filter assembly as shown in Figure 4;

FIG. 6 shows a partial enlarged view at A of the filter assembly shown in FIG. 4 .

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 6 is:

100 filter assembly, 1 filter element, 10 filter medium, 12 inner layer medium, 14 outer layer medium, 20 barrel body, 22 filter element head, 222 second water outlet pipe, 224 water inlet pipe, 226 first connection part, 24 first end cap , 242 the first outlet pipe, 26 the second end cover, 28 pearl cotton pad, 30 filter element seat, 32 filter element joint, 322 the first groove, 324 the second groove, 34 pipeline structure, 342 water outlet channel, 344 inlet Water channel, 42 first seal, 44 second seal, 46 third seal, 48 fourth seal.

Detailed ways

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

The following describes a filter element 1 and a filter assembly 100 according to some embodiments of the present invention with reference to FIGS. 1 to 6 .

As shown in Figures 1 to 3, according to the first embodiment of the present invention, the present invention provides a filter element 1, comprising: a barrel body 20; a filter element head 22, the cover is arranged on the barrel body 20 to form a cavity; The filter medium 10 is arranged in the cavity; the filter medium 10 includes: an inner layer medium 12, the inner layer medium 12 is provided with through holes along the axial direction; a multi-layer outer layer 14 medium is sleeved outside the inner layer medium 14; The density of the outer layer medium 14 increases layer by layer from the outside to the inside.

The filter element 1 provided by the present invention is used in a refrigerator, wherein the filter medium 10 is placed in the cavity formed by the fastening of the barrel body 20 and the filter element head 22, and the outer layer medium 14 of the filter medium 10 is set to be multi-layered, and more The density of the outer layer medium 14 increases layer by layer from the outside to the inside, so that the area of the filter holes of the multilayer outer layer medium 14 decreases layer by layer from the outside to the inside, and then the filter medium 14 filters the impurities layer by layer when filtering the liquid. , enhance the dirt-holding capacity of the filter element, and prevent the small filter holes from being blocked by large particles of impurities. Compared with the combination of multiple filter elements in the related art, the filter element 1 provided by the present invention is not only small in size, but also can effectively delay the attenuation of the flow rate of the filter element and improve the filtration efficiency. Media life.

In an embodiment of the present invention, optionally, the inner medium 12 is made by mixing carbon powder, ultra-high molecular weight polyethylene and metal chelating agent.

In this embodiment, the carbon powder is used to filter and purify the impurities in the liquid, and the heavy metal metal chelating agent is used to remove the heavy metals in the liquid, so as to improve the purification rate of the liquid and ensure the safety of the liquid.

In an embodiment of the present invention, optionally, the inner layer medium 12 is made by mixing carbon powder, ultra-high molecular weight polyethylene, and silver-loaded antibacterial agent.

In this embodiment, the carbon powder is used to filter and purify the impurities in the liquid, and the silver-loaded antibacterial agent is used to carry out antibacterial treatment on the liquid, so as to improve the purification rate of the liquid and ensure the safety of the liquid.

In one embodiment of the present invention, optionally, the inner layer medium 12 is made of a mixture of carbon powder, ultra-high molecular weight polyethylene, metal chelating agent, and silver-loaded antibacterial agent.

In this embodiment, carbon powder is used to filter and purify the impurities in the liquid, and the silver-loaded antibacterial agent is used to carry out antibacterial treatment on the liquid, and the heavy metal in the liquid is removed by the metal chelating agent of heavy metals, so as to improve the purification of the liquid The rate ensures the safety of the liquid.

Wherein, preferably, the carbon powder adopts nanoscale superfine carbon powder, and the metal chelating agent adopts titanium chelating agent.

In one embodiment of the present invention, preferably, when the inner layer medium 12 contains carbon powder, ultra-high molecular weight polyethylene, metal chelating agent, and silver-loaded antibacterial agent, the carbon powder accounts for 50% to 80%; High molecular weight polyethylene accounts for 15% to 35%; metal chelating agent accounts for 0.1% to 10%; silver-loaded antibacterial agent accounts for 0.1% to 10%.

In this embodiment, the components in the water to be purified are analyzed, and according to the specific dirt components in the water to be purified, by reasonably controlling the components of the inner layer medium 12, the cost can be reduced while ensuring the filtering effect.

Wherein, preferably, in normal household use, it is only necessary to analyze the municipal water, and then reasonably mix the components of the inner layer medium 12 .

In one embodiment of the present invention, preferably, as shown in FIG. 3 , the outer medium 14 is a ring structure curled into a smooth shape.

In this embodiment, by curling the outer medium 14 into a smooth annular structure, the multi-layer outer medium 14 is nested layer by layer to form a ring structure, which reduces the thickness of the outer medium 14 and improves the liquid resistance. filter effect.

In a specific embodiment, the rolling thickness can be adjusted according to the thickness of the single-layer outer medium 14 .

In one embodiment of the present invention, preferably, as shown in FIG. 2 , the outer medium 14 is folded into a wrinkled ring structure.

In this embodiment, the filter area of the outer layer medium 14 is increased by setting the outer layer medium 14 with a pleated structure, thereby improving the filtering efficiency of the liquid.

In a specific embodiment, the multi-layer outer media 14 can be stacked, and then the multi-layer outer media 14 can be folded and wound into a ring shape.

In an embodiment of the present invention, preferably, the material of the multi-layer outer layer medium 14 is PP cotton.

In this embodiment, PP cotton is used to ensure the filtering effect on liquids, and PP cotton is cheap, easy to manufacture, and easy to control in density, making it easy to make multi-layer outer layer media 14 with progressive filtering degree.

In a specific embodiment, folded PP cotton can be used, so that the outer layer medium 14 is wrinkled, and the circular outer layer medium 14 can also be rolled with sheet-shaped PP cotton, and the circular ring-shaped PP cotton can also be directly produced. cotton.

In one embodiment of the present invention, preferably, as shown in FIGS. 1 to 3 , the inner medium 12 and the outer medium 14 are cylindrical.

In this embodiment, the cylindrical outer layer medium 14 and the inner layer medium 12 are more space-saving, the degree of filtration of the water filtered by the surrounding side of the filter medium 10 is consistent, and the filtration volume of the liquid is ensured.

In one embodiment of the present invention, preferably, as shown in FIG. 1 , it also includes: a first end cover 24, installed on the end of the filter medium 10 facing the filter head 22, forming a gap with the side wall of the barrel body 20, the second One end cover 24 is provided with a first outlet pipe 242; the second end cover 26 is installed on the other end of the filter medium 10 and is located in the cavity.

In this embodiment, through the cooperation of the first end cover 24 and the filter element head 22, the raw water flows into the barrel body 20 through the gap between the first end cover 24 and the barrel body 20, and is filtered layer by layer from the outside of the filter medium 10. The final clean water flows out through the first water outlet pipe 242 on the first end cover 24 through the through hole on the inner layer medium 12, so as to realize the effective isolation of the raw water and the clean water and ensure the filtering effect. The bottom support of the filter medium 10 ensures the installation position of the filter medium 10 .

In one embodiment of the present invention, preferably, as shown in FIG. 1 , it further includes: a pearl cotton pad 28 , which is provided on the side of the second end cap 26 away from the filter medium 10 and located at the bottom of the cavity.

In this embodiment, the pearl cotton pad 28 provides good flexible support, and provides a good water-proof effect, ensures the installation position of the filter medium 10 in the bucket body 20, and ensures that water enters the filter medium from the surrounding side of the filter medium 10 The through holes in 10 ensure the water purification effect.

In one embodiment of the present invention, preferably, as shown in FIG. 1 , the filter element head 22 is protrudingly provided with a second water outlet pipe 222, and the second water outlet pipe 222 is adapted to the first water outlet pipe 242; the filter element head 22 A water inlet pipe 224 is arranged around the second water outlet pipe 222 ; wherein, a sealing member is arranged between the second water outlet pipe 222 and the first water outlet pipe 242 .

In this embodiment, through the cooperation of the second water outlet pipe 222 arranged on the filter element head 22 and the first water outlet pipe 242, the raw water is introduced into the barrel body 20, and the water inlet pipe 224 surrounds the second water outlet pipe 222 Setting reduces the volume of the filter element head 22, making the filter element 1 more compact.

Specifically, the cooperation between the first water outlet pipe 242 and the second water outlet pipe 222 may be that the second water outlet pipe 222 is connected to the first water outlet pipe 242, or the second water outlet pipe 222 is sleeved on the first water outlet pipe. 242, and the first water outlet pipe 242 is sleeved outside the second water outlet pipe 222.

Wherein, when the second water outlet pipe 222 and the first water outlet pipe 242 are sleeved, a first sealing member 42 and a second sealing member 44 are arranged between the two, wherein the sealing member can be a sealing ring, a rubber pad, a sealant Wait.

In one embodiment of the present invention, preferably, as shown in FIG. 1 , the outer wall of the filter head 22 is provided with a first connecting portion 226 .

In this embodiment, the first connecting portion 226 is provided on the outer wall of the filter head 22 to facilitate the convenient and quick connection between the filter head 22 and the filter socket 30 .

Wherein, specifically, the first connecting portion 226 may be a thread, a snap, a slot, a buckle, a slot, and the like.

As shown in Figure 2 and Figure 3, the schematic diagram of the composite filter medium 10 provided by the present invention, the filter medium 10 can be compounded in two ways, the outer medium 14 in the filter medium 10 shown in Figure 1 is made of PP cotton of different precision The layers are folded after being laminated, and the folding can be designed according to the life of the filter element and the flow rate; the outer medium 14 in the filter medium 10 shown in Figure 2 is made of PP cotton layers of different precision according to the requirements of filtration accuracy, from the inner medium 12 The outer layer of the outer layer is rolled from high precision to low precision in turn, and the outer layer medium 14 has a filter precision from low to high from the outside to the inside, and the filter aperture gradually changes from large holes to small holes, increasing the dirt holding capacity of the filter medium 10, effectively Slow down the flow rate decay of the filter element.

Wherein, the inner layer medium 12 in the filter medium 10 is a carbon rod, which is compounded with a titanium chelating agent and a silver-loaded antibacterial agent that can remove heavy metals, wherein the ultrafine carbon powder accounts for 50% to 80%; High molecular weight polyethylene accounts for 15% to 35%; titanium chelating agent accounts for 0.1% to 10%; silver-loaded antibacterial agent accounts for 0.1% to 10%; the carbon rod has the functions of removing heavy metals, inhibiting bacteria, and adsorbing organic matter.

As shown in Figures 4 to 6, according to the second embodiment of the present invention, the present invention provides a filter assembly 100, including: the filter element 1 provided in any of the above-mentioned embodiments; and the filter element socket 30, and the filter element 1; wherein, the filter element head 22 of the filter element 1 is provided with a first connecting portion 226; the filter element seat 30 is provided with a second connecting portion adapted to the first connecting portion 226.

The filter assembly 100 provided by the present invention is used in a refrigerator, wherein the filter element socket 30 is installed on the water system of the refrigerator, and the filter element 1 and the filter element socket 30 are installed together through the first connecting part 226 and the second connecting part to realize the filter element 1 Fast and reliable installation with the filter element socket 30, and the filter assembly 100 proposed by the present invention includes the filter element 1 provided in any of the above-mentioned embodiments, so it has all the features of the filter element 1 provided in any of the above-mentioned embodiments Beneficial effects are not stated one by one here.

In the process of implementation, the filter element socket 30 is installed in the water channel of the refrigerator, and only the filter element 1 needs to be replaced through the first connection part 226 and the second connection part during replacement, which saves maintenance costs.

Wherein, the first connecting portion 226 and the second connecting portion may be matched threads, matched buckles and slots, matched buckles and slots, and the like.

In one embodiment of the present invention, preferably, as shown in Fig. 4 to Fig. 6, it also includes: the filter element socket 30 includes: a filter element joint 32, the filter element joint 32 is provided with a first groove 322, and in the first concave The second groove 324 sunken at the bottom of the groove 322; the pipeline structure 34 is arranged on the side of the filter joint 32, and the pipeline structure 34 is provided with a water inlet channel 344 and a water outlet channel 342, and the water inlet channel 344 is connected to the first groove 322 Inside, the water outlet channel 342 is connected to the second groove 324 ; wherein, the second groove 324 is adapted to the second water outlet pipe 222 , and the first groove 324 is connected to the water inlet pipe 224 .

In this embodiment, by rationally arranging the water channel in the filter element socket 30, the first groove 322 and the second groove 324 with a stepped structure are used, so that the filter element socket 30 can maintain a small volume, and it is fixed in the refrigerator. In the limited space, the water filtration effect is guaranteed, the life of the filter element is extended and the attenuation of the flow rate is reduced.

Since the filter assembly 100 is installed inside the refrigerator during installation, rationally setting the water path of the filter element socket 30 can reduce the volume of the filter element socket 30 and save the available space in the refrigerator.

In one embodiment of the present invention, preferably, as shown in FIGS. 224 are provided with seals.

In this embodiment, seals are provided between the side wall of the second groove 324 and the second water outlet pipe 222, and between the side wall of the first groove 322 and the water inlet pipe 224 to ensure the separation between the raw water and the purified water. Completely isolated to ensure water purification effect.

Specifically, a first sealing member is provided between the side wall of the second groove 324 and the second water outlet pipe 222 , and a second sealing member is provided between the side wall of the first groove 322 and the water inlet pipe 224 .

Wherein, the sealing member may be a sealing ring, a rubber pad, a sealant, and the like.

In one embodiment of the present invention, preferably, as shown in FIGS. 4 to 6 , the water inlet channel 344 and the water outlet channel 342 run through the pipeline structure 34 and are distributed in parallel in the pipeline structure 34 longitudinally.

In this embodiment, by arranging the water inlet channel 344 and the water outlet channel 342 side by side in the pipeline structure 34, the water inlet channel 344 and the water outlet channel 342 of the filter assembly 100 are located on the same side of the filter element socket 30, occupying a small space , and only a single pipeline structure 34 is used, which reduces the difficulty of installing the filter element socket 30 on the main body of the household appliance.

Wherein, one end of the water inlet channel 344 of the filter element socket 30 is used for municipal tap water to enter, and the water inlet channel 342 is connected to the main body of the household appliance, such as connecting to the water tank of the refrigerator to provide purified water for the refrigerator; The water channel 344 is connected with the raw water channel of the water inlet pipe 224 in the filter head 22 through the water inlet hole on the filter head 22, and the water outlet channel 342 on the filter element seat 30 is connected with the second water outlet in the filter head 22 through the water outlet hole on the filter head 22. The purified water channel of the water outlet pipe 222 is connected, and the purified water sealing ring (first seal 42) plays a role in sealing the gap between the purified water channel in the second groove 324 of the filter element socket 30 and the second water outlet pipe 222 in the filter element head 22. Function: the raw water sealing ring (the second sealing member 44 ) plays the role of sealing the gap between the first groove 322 in the filter element seat 30 and the water inlet pipe 224 in the filter element head 22 . The first end cover sealing ring (the third sealing member 46 and the fourth sealing member 48) plays a role in sealing the gap between the raw water channel and the purified water channel, preventing the filter element 1 from stringing water; the first end cover 24 passes the hot melt adhesive and the composite filter medium 10 bonding; the second end cover 26 is bonded with the composite filter medium 10 by hot melt adhesive, and the pearl cotton pad 28 is set under the second end cover 26, and a certain shape is reserved in the middle of the pearl cotton and the positioning on the second end cover 26 The slot and the positioning ring at the bottom of the barrel body 20 match to prevent the filter medium 10 from being degummed when it is dropped or subjected to excessive force during transportation.

As shown in Figure 3, the flow mode of the waterway in the filter assembly 100, municipal tap water enters the raw water channel from the filter element joint water inlet channel 344, and enters the filter assembly 100 raw water chamber through the raw water hole of the water inlet pipe at 22 places of the filter element head, and the raw water chamber is formed by the filter element The barrel body 20, the outer wall of the filter medium, the first end cover 24, the second end cover 26 and hot melt adhesive are sealed, and then penetrate into the filter medium 10 successively, pass through the outer layer medium 14 (PP cotton layer), and enter the inner filter medium 14. Layer medium 12 (carbon rod layer), finally penetrates the inner wall of the carbon rod and enters the purified water chamber, which is sealed by the inner wall of the filter medium 10, the first end cover 24, the second end cover 26 and hot melt adhesive. Rust, solid particles, colloids, organic matter, and heavy metals in the raw water are intercepted, adsorbed or chelated by the filter medium 10, and become clean and drinkable purified water. At the same time, beneficial mineral elements are retained in the water. Driven through the purification channel, it finally flows out from the purified water port of the filter assembly 100 .

According to a third embodiment of the present invention, the present invention provides a household appliance, comprising: a main body of the household appliance; and the filter element 1 provided in any of the above embodiments; or the filter assembly 100 provided in any of the above embodiments.

The household appliance provided by the present invention includes the filter element 1 provided in any of the above-mentioned embodiments, or the filter assembly 100 provided in any of the above-mentioned embodiments, therefore, it has the filter element 1 provided in any of the above-mentioned embodiments, or as described above All the beneficial effects of the filter assembly 100 provided by any embodiment will not be stated one by one here.

Wherein, preferably, the household appliance may be a refrigerator, a water purifier, a water dispenser, a water heater, and the like.

To sum up, the filter element, filter assembly 100 and household appliances provided by the present invention, wherein the filter medium 10 is placed in the cavity formed by fastening the barrel body 20 and the filter element head 22, and the outer medium 14 of the filter medium 10 It is arranged as multiple layers, and the density of the multilayer outer layer medium 14 increases layer by layer from the outside to the inside, so that the area of the filter hole of the multilayer outer layer medium 14 decreases layer by layer from the outside to the inside, and then the filter medium 14 is filtering the liquid. When the impurities are filtered layer by layer, the dirt-holding capacity of the filter element is enhanced, and the small filter holes are prevented from being blocked by large particles of impurities. Compared with the combination of multiple sets of filter elements in the related art, the filter element 1 provided by the present invention is not only small in size, but also can Effectively delay the flow rate decay of the filter element and increase the life of the filter medium.

In the present invention, the terms "first" and "second" are only used for the purpose of description, and cannot be interpreted as indicating or implying relative importance. Terms such as "connecting" and "connecting" should be understood in a broad sense, such as , "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediary. It is necessary to understand the specific meanings of the above terms in the present invention.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (15)

1. A filter element, characterized in that, comprising: Barrel body; The filter head, the cover is set on the barrel body to form a cavity; a filter medium arranged in the cavity; The filter media includes: an inner layer medium, the inner layer medium is provided with through holes along the axial direction; A multi-layer outer layer of medium is sleeved outside the inner layer of medium; Wherein, the density of the multi-layer outer layer medium increases layer by layer from outside to inside. 2. The filter element according to claim 1, characterized in that, The inner layer medium is made by mixing carbon powder, ultra-high molecular weight polyethylene and at least one of the following materials: metal chelating agent, silver-loaded antibacterial agent. 3. The filter element according to claim 2, characterized in that, When the carbon powder, the ultra-high molecular weight polyethylene, the metal chelating agent, and the silver-loaded antibacterial agent are included in the inner layer medium, The carbon powder accounts for 50% to 80%; The ultra-high molecular weight polyethylene accounts for 15% to 35%; The metal chelating agent accounts for 0.1% to 10%; The silver-loaded antibacterial agent accounts for 0.1% to 10%. 4. The filter element according to claim 1, characterized in that, The outer medium is curled into a smooth annular structure; or The outer medium is folded into a pleated ring structure. 5. The filter element according to claim 1, characterized in that, The material of the multi-layer outer layer medium is PP cotton. 6. The filter element according to claim 1, characterized in that, Both the inner medium and the outer medium are cylindrical. 7. The filter element according to any one of claims 1 to 6, further comprising: The first end cover is installed on the end of the filter medium facing the filter head, forming a gap with the side wall of the bucket body, and the first end cover is provided with a first outlet pipe; The second end cap is installed on the other end of the filter medium and is located in the cavity. 8. The filter element according to claim 7, further comprising: The pearl cotton pad is arranged on the other end of the second end cover and is located at the bottom of the cavity. 9. The filter element according to any one of claims 1 to 6, characterized in that, The protruding part of the filter element head is provided with a second water outlet pipe, and the second water outlet pipe is compatible with the first water outlet pipe; The filter head is provided with a water inlet pipe surrounding the second water outlet pipe; Wherein, a seal is provided between the first water outlet pipe and the second water outlet pipe. 10. The filter element according to any one of claims 1 to 6, characterized in that, The filter head is provided with a first connecting portion. 11. A filter assembly, characterized in that, comprising: A filter element as claimed in any one of claims 1 to 10; and The filter element socket is adapted to the filter element; Wherein, the filter head of the filter element is provided with a first connecting portion; A second connecting portion matched with the first connecting portion is arranged on the filter element socket. 12. The filter assembly of claim 11, wherein: The filter socket includes: A filter element joint, the filter element joint is provided with a first groove, and a second groove sunken at the bottom of the first groove; The pipeline structure is arranged on the side of the filter element joint, the pipeline structure is provided with a water inlet channel and a water outlet channel, the water inlet channel is connected to the first groove, and the water outlet channel is connected to the in the second groove; Wherein, the second groove is adapted to the second water outlet pipe, and the first groove is connected to the water inlet pipe. 13. The filter assembly of claim 12, wherein: Between the side wall of the second groove and the second outlet pipe, and A seal is provided between the side wall of the first groove and the water inlet pipe. 14. A filter assembly according to any one of claims 11 to 13, wherein The water inlet channel and the water outlet channel are arranged in parallel in the pipeline structure. 15. A household appliance, characterized in that it comprises: the main body of the household appliance; and A filter element as claimed in any one of the preceding claims 1 to 10; or A filter assembly as claimed in any one of claims 11 to 14; Wherein, the filter element socket is installed in the water system of the main body of the household appliance.