CN215102148U - A center tube, filter element group spare and purifier for filter element group spare - Google Patents

Abstract

The utility model provides a center tube, filter element group spare and purifier for filter element group spare. A one-way water subassembly of crossing for filter element group spare includes the body and is connected to on the body, is provided with the inlet opening on the lateral wall of body, and one-way water subassembly of crossing includes elastic sealing element, and elastic sealing element seals the inlet opening, and elastic sealing element is used for taking place elastic deformation and making the inlet opening switch on under forward hydraulic effect. Under the long-time standby's of filter element group spare condition, compare with prior art, adopt the utility model discloses the filter element group spare of center tube also can effectively reduce the TDS of the first cup of water that the user accepted. Moreover, because pure water bubble membranes are not needed, water resources are saved, and energy consumption generated by preparing the pure water is reduced.

Description

A center tube, filter element group spare and purifier for filter element group spare

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a filter element group spare and purifier that has filter element group spare for filter element group spare's center tube, have it.

Background

With the pursuit of the public for the quality of life, the quality of water begins to pay attention. Reverse osmosis filter element assemblies are becoming more popular because of the fresher, more sanitary, and safer purified water they produce.

The raw water has higher TDS (soluble solid total amount) more, and reverse osmosis filter element group spare can stop a large amount of ions in the raw water before reverse osmosis membrane under the effect of booster pump, and makes the TDS of the pure water through reverse osmosis membrane accord with the standard of straight drinking water. Meanwhile, the reverse osmosis filter element assembly can discharge high-TDS concentrated water according to a certain proportion when preparing pure water. In the process of water production, although concentrated water can be discharged through a concentrated water pipeline, a small amount of concentrated water still exists in the reverse osmosis membrane filter element assembly after the water production is finished. The reverse osmosis membrane is typically wrapped around a central tube through which pure water passing through the reverse osmosis membrane can flow out of the reverse osmosis cartridge assembly. After the long-time standby, according to the principle that ions diffuse from high concentration solution to low concentration solution, ions in the concentrated water in front of the reverse osmosis membrane can diffuse into the pure water in the central tube, resulting in that when the next water is taken, the TDS of the first cup of water taken by the user is higher.

In order to reduce the TDS of the first cup of water after the long-time standby, some existing reverse osmosis filter core assemblies use the technology of pure water bubble membranes, namely, the pure water is used for replacing concentrated water and raw water in the reverse osmosis filter core assemblies after the standby, so that the reverse osmosis filter core assemblies are completely filled with the pure water during the standby. Thus, the concentrated water and the raw water in front of the reverse osmosis membrane need to be replaced by the pure water prepared in advance after each standby, so that a large amount of pure water needs to be used for washing the filter element assembly, waste of water resources is caused, and energy consumption generated by preparing the pure water is high.

SUMMERY OF THE UTILITY MODEL

To at least partially address the problems with the prior art, in accordance with one aspect of the present invention, a center tube for a filter element assembly is provided. A one-way water subassembly of crossing for filter element group spare includes the body and is connected to on the body, is provided with the inlet opening on the lateral wall of body, and one-way water subassembly of crossing includes elastic sealing element, and elastic sealing element seals the inlet opening, and elastic sealing element is used for taking place elastic deformation and making the inlet opening switch on under forward hydraulic effect.

Under the long-time standby's of filter element group spare condition, compare with prior art, adopt the utility model discloses the filter element group spare of center tube also can effectively reduce the TDS of the first cup of water that the user accepted. Moreover, because pure water bubble membranes are not needed, water resources are saved, and energy consumption generated by preparing the pure water is reduced.

Exemplarily, the one-way water passing assembly further comprises a connecting piece and a rod body, the elastic sealing piece seals the water inlet hole at the inner side of the pipe body, the rod body penetrates through the side wall of the pipe body, the first end of the rod body is connected to the elastic sealing piece, the second end of the rod body is connected to the connecting piece, and the connecting piece is located at the outer side of the pipe body. Because the inboard space of body is less, draws the outside of body to the connecting piece through the body of rod and fixes elastic sealing spare, can avoid too much equipment step to go on in the inside of body to reduce the production degree of difficulty, improve production efficiency, reduce the cost of generation.

Illustratively, the rod body passes through the side wall of the pipe body by passing through the water inlet hole, and a gap is formed between the wall of the water inlet hole and the side wall of the rod body. Therefore, on the basis of fixing the elastic sealing element on the outer side of the pipe body, a connecting hole is not needed, and the pipe body is simpler in structure and low in manufacturing cost. And, through the size of increase inlet opening, can also utilize elastic sealing element to have elastic characteristic, extrude elastic sealing element in the inlet opening from the outside of the lateral wall of body to realize elastic sealing element seals the inlet opening in the inboard of body. The one-way water passing assembly can be completely installed from the outer side of the pipe body, the production difficulty is further reduced, and the production efficiency is improved.

Illustratively, be provided with the body groove on the lateral wall of body, the connecting piece is held in the body inslot, and the inlet opening extends to the inside wall of body from the tank bottom in body groove, forms the rivers passageway between the cell wall in connecting piece and body groove, and the rivers passageway intercommunication is between the notch in body groove and inlet opening. Through the arrangement, on one hand, the connecting piece is convenient to position, and the elastic sealing piece is convenient to fix; on the other hand, the outer side of the central tube is not provided with the convex part, so that the filter material can surround the central tube conveniently.

Illustratively, the connector has a shape that conforms to the body groove to fix the position of the connector relative to the body groove. Through the arrangement, the situation that the unidirectional water passing assembly is separated from the expected position under the action of water pressure can be prevented, and the unidirectional water passing assembly is better positioned.

Illustratively, the connecting piece is provided with a connecting groove on the side wall facing the pipe body, the opening size of the connecting groove is smaller than the bottom size of the connecting groove, the second end of the rod body is in a shape matched with the connecting groove, and the second end of the rod body is plugged into the connecting groove. Therefore, the rod body and the connecting piece can be conveniently connected together. Moreover, when the elastic sealing element is damaged after long-term use, the elastic sealing element can be conveniently replaced, and the maintenance cost of the one-way water passing assembly is low.

Illustratively, the rod body and the elastic sealing element are an integral elastic element. Thus, the assembly steps can be reduced, the production efficiency can be improved, and the production cost can be reduced.

Illustratively, the side wall of the tube body is further provided with a connecting hole, and the rod body penetrates through the side wall of the tube body by penetrating through the connecting hole. Through the arrangement, the design and processing requirements on the central tube are low, and the manufacturing cost is low.

Illustratively, the middle part of the elastic sealing member is connected to the pipe body, the water inlet holes are arranged in groups, the water inlet holes in the groups are dispersedly arranged around the middle part of the elastic sealing member, and the elastic sealing member simultaneously seals the water inlet holes in the groups. Through the arrangement, the structure of the one-way water passing assembly is simpler, and the manufacturing cost is low. And, with the inlet opening around the middle part dispersion arrangement of elastic sealing member, can increase the intake sectional area of inlet opening as far as possible, improve into water efficiency.

According to another aspect of the utility model, still provide a filter element group spare. The filter element assembly comprises a central tube and a filter material used for the filter element assembly, wherein the filter material surrounds the central tube used for the filter element assembly.

Illustratively, the filter material comprises a reverse osmosis membrane or a nanofiltration membrane.

According to another aspect of the utility model, still provide a purifier. The purifier includes any kind of filter element group spare as above.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1A is an angled cross-sectional view of a center tube for a filter cartridge assembly according to a first exemplary embodiment of the present invention, with a one-way water passing assembly removed;

FIG. 1B is another angular cross-sectional view of the center tube for the filter cartridge assembly shown in FIG. 1A;

FIG. 1C is an enlarged partial view of the center tube for the filter cartridge assembly shown in FIG. 1B;

fig. 2A is an angled cross-sectional view of a center tube for a filter cartridge assembly according to a second exemplary embodiment of the present invention, with a one-way water passing assembly removed;

FIG. 2B is another angular cross-sectional view of the center tube for the filter cartridge assembly shown in FIG. 2A;

FIG. 2C is an enlarged partial view of the center tube for the filter cartridge assembly shown in FIG. 2B;

fig. 3A is an angled cross-sectional view of a center tube for a filter cartridge assembly according to a third exemplary embodiment of the present invention, with a one-way water passing assembly removed;

FIG. 3B is another angular cross-sectional view of the center tube for the filter cartridge assembly shown in FIG. 3A;

FIG. 3C is an enlarged partial view of the center tube for the filter cartridge assembly shown in FIG. 3B;

FIG. 3D is a side view of the one-way water passing assembly shown in FIG. 3C;

fig. 4A is a partial perspective view of a tubular body according to an exemplary embodiment of the present invention; and

fig. 4B is a partial perspective view of a tubular body according to another exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. 100', 100 ", a tube; 110. 110', 110 ", water inlet holes; 120', 120 ", tube body slot; 130', connecting holes; 210. 210', 210 ", elastomeric seal; 220', 220 ", connecting piece; 221' connecting groove; 230', 230 ", a shaft.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

In order to reduce the TDS of the initial cup of water, according to one aspect of the present invention, a center tube (hereinafter referred to as center tube) for a filter cartridge assembly is provided. The center tube may be applied to a filter element assembly. Therefore, according to another aspect of the present invention, there is also provided a filter element assembly. The filter element assembly includes a base pipe and a filter material surrounding the base pipe. The filter material includes, but is not limited to, a reverse osmosis membrane or a nanofiltration membrane. The filter element assembly can be applied to water purifying equipment such as a water purifier. Therefore, according to another aspect of the present invention, there is provided a water purifier. The purifier includes any kind of filter element group spare of the embodiment of the utility model. The filter element assembly can also be used for other water-requiring equipment if necessary. A central tube and a filter element assembly having the same according to embodiments of the present invention will now be described in detail with reference to FIGS. 1A-1C, 2A-2C, 3A-3D, and 4A-4B.

As shown in fig. 1A-1C, the center tube can include a tube body 100 and a one-way water passing assembly. The sidewall of the pipe body 100 may be provided with a water inlet hole 110. The number, shape and location of the water inlet holes 110 are not limited. Illustratively, the water inlet hole 110 may be a circular hole, a rectangular hole, or any other suitable shape of through hole. In the embodiment shown in the drawings, the water inlet holes 110 are arranged dispersedly along the axial direction of the central tube. In other embodiments not shown in the figures, the water inlet holes 110 may be arranged in a dispersed manner along the axial direction of the central tube, or in any other manner.

A one-way water passing assembly may be connected to the pipe body 100. The means for connecting the water passing assembly to the tubular body 100 includes, but is not limited to, welding, gluing, clamping, etc. The one-way water passing assembly may include a resilient seal 210. The elastomeric seal 210 may be made of any suitable elastomeric material. Preferably, the elastic seal 210 may be made of a soft rubber-like material. Thus, the elastic sealing member 210 has good elasticity, and is convenient to restore to its original shape after being elastically deformed. The elastomeric seal 210 is preferably made of a food grade elastomeric material so that there is no dissolved material, thereby ensuring water safety. The elastomeric seal 210 may seal the inlet aperture 110. The elastic sealing member 210 is elastically deformed by the forward water pressure, so that the water inlet hole 110 can be opened. The forward direction refers to a water pressure direction capable of elastically deforming the elastic sealing member 210. In other words, the elastic sealing member 210 is not elastically deformed by the water pressure in other directions; or the elastic sealing member 210 is elastically deformed but cannot make the water inlet 110 open, i.e. water cannot pass through the water inlet 110.

Illustratively, the elastomeric seal 210 seals the inlet aperture 110 at an exterior of the inlet aperture 110. In this case, it is preferable that the elastic sealing member 210 has a size larger than that of the water inlet hole 110 to ensure good sealability of the water inlet hole 110 when the elastic sealing member 210 is not elastically deformed. Illustratively, the elastomeric seal 210 may also be received in the inlet aperture 110. The elastic sealing member 210 seals the water inlet hole 110 within the water inlet hole 110. Illustratively, the resilient seal 210 may also be a combination of the two approaches described above. The resilient seal 210 may be any suitable shape, such as circular, oval, rectangular, and the like.

In actual use, when the filter element assembly with the central pipe produces water, positive pressure from a raw water side to a pure water side is formed in the filter element assembly. The direction of the water inlet hole 110 conducted under the control of the elastic sealing member 210 is the same as the direction of the positive pressure. Under the action of the positive pressure, the elastic sealing element 210 can be elastically deformed to make the water inlet 110 conduct in one direction. Water may be circulated between the inside and the outside of the pipe body 100 through the water inlet hole 110. When the water production is stopped, the elastic sealing member 210 is restored to its original shape, thereby sealing the water inlet hole 110 and stopping the water inlet hole 110. Water cannot pass through the water inlet hole 110, so that pure water and concentrated water can be separated.

The principle of the present invention will be described below by taking a filter element assembly as an example, which uses a reverse osmosis membrane as a filter material. As known to those skilled in the art, the reverse osmosis membrane is wrapped around a central tube through which the reverse osmosis cartridge assembly delivers pure water.

As is known to those skilled in the art, water can only pass through a reverse osmosis membrane after being pressurized, for example, by a booster pump. In the water making process, the booster pump is started, and after the water after being boosted passes through the reverse osmosis membrane, the forward water pressure can act on the elastic sealing element 210, so that the elastic sealing element 210 is elastically deformed, and the water inlet 110 is communicated. Water may pass through the water inlet holes 110 to enter the tube body 100 and then flow out of the reverse osmosis cartridge assembly for use. And after water production is finished, the booster pump stops working. A small amount of concentrated water remains before the reverse osmosis membrane. At this time, since the booster pump has stopped working, the pressure in front of the reverse osmosis membrane is gradually released through the waste water ratio, and the elastic sealing member 210 gradually recovers its original shape, i.e., seals the water inlet hole 110. The water inlet 110 is cut off, and the concentrated water cannot pass through the water inlet 110. Therefore, ions in the remaining concentrated water cannot diffuse into the pure water in the pipe body 100 of the center pipe, and the pure water in the pipe body 100 can be kept pure. In some cases, there may be a quantity of pure water outside the central tube behind the reverse osmosis membrane (i.e., pure water between the membranes) that is much smaller than the quantity of pure water in the central tube. Even though this water may cause a rise in TDS due to ion diffusion. However, when the next time water is taken, the part of pure water is mixed and diluted with the pure water in the pipe body 100 and the pure water newly prepared by the subsequent reverse osmosis filter core assembly, so that the TDS of the first cup of water taken by the user is still low.

Therefore, even under the long-time condition of standby of filter element group spare, compare with prior art, adopt the utility model discloses the filter element group spare of center tube also can effectively reduce the TDS of the first cup of water that the user accepted. Moreover, because pure water bubble membranes are not needed, water resources are saved, and energy consumption generated by preparing the pure water is reduced.

In a first preferred embodiment, as shown in fig. 1A-1C, the middle portion of the resilient seal 210 may be attached to the tube 100 at any suitable location, such as on the inside wall of the tube 100, by any suitable means, such as ultrasonic welding or gluing. Positive water pressure may act on the edges of the resilient seal 210. The edge refers to the area outside the middle of the elastomeric seal 210. Under the action of positive water pressure, the edge of the elastic sealing member 210 is elastically deformed, so that a gap is formed between the edge of the elastic sealing member 210 and the sidewall of the pipe body 100, and water can pass through the water inlet hole 110. After the water preparation is completed, the elastic sealing member 210 is restored to the state of sealing the water inlet hole 110, and the concentrated water cannot pass through the water inlet hole 110. Further, the water inlet holes 110 may be arranged in groups. The number of inlet openings 110 in a group may be two, three or more. The shape of the water inlet holes 110 in the sets may be the same or different. The water inlet holes 110 in the group may be distributed around the middle of the elastic sealing member 210. The elastomeric seal 210 may simultaneously seal the water inlet holes 110 within the stack. Through the arrangement, the structure of the one-way water passing assembly is simpler, and the manufacturing cost is low. In addition, the water inlet holes 110 are distributed around the middle of the elastic sealing element 210, so that the water inlet sectional area of the water inlet holes 110 can be increased as much as possible, and the water inlet efficiency is improved.

In a second preferred embodiment, as shown in fig. 2A-2C, the one-way water passing assembly may further include a connector 220 ' and a rod 230 ' in addition to the elastic sealing member 210 '. The connector 220' may include any suitable structure such as a nut, a latch, etc. The elastic sealing member 210 ' may seal the water inlet hole 110 ' at the inner side of the tube body 100 '. The rod 230 'may pass through the sidewall of the tube 100'. The first end of the stem 230 'may be connected to the resilient seal 210' by any suitable means, such as threading, snapping, welding, gluing, etc. The second end of the shaft 230 'may be connected to the connector 220' by any suitable means, such as threading, snapping, welding, gluing, etc. The first end and the second end may be oppositely disposed. The connector 220 'may be located outside the tube 100'. The stem 230 ' may also be integrally formed with one or both of the connector 220 ' and the elastomeric seal 210 '. Alternatively, the connector 220 'may be further connected to the outer sidewall of the tube 100' by ultrasonic welding, gluing, or the like. Alternatively, the sidewall of tubular body 100 'may be clamped between connector 220' and resilient seal 210 'to secure resilient seal 210'. Because the inner space of the tube 100 'is small, the connecting element 220' is led out of the tube 100 'through the rod 230' to fix the elastic sealing element 210 ', so that excessive assembling steps can be avoided in the tube 100', the production difficulty is reduced, the production efficiency is improved, and the production cost is reduced.

Preferably, as shown in fig. 2A-2C, the connector 220' is spherical. In other embodiments not shown in the figures, the connector 220' may be any other suitable shape. Preferably, the outer sidewall of the tube body 100 'may be provided with a tube body groove 120'. The connector 220 'may be fully or partially received within the body groove 120'. The body groove 120 'may have a shape adapted to the connector 220'. By this arrangement, it is easy to position the connection element 220 'and to fix the elastic sealing element 210'; on the other hand, the outer side of the central tube is not provided with the convex part, so that the filter material can surround the central tube conveniently. The connector 220 'and the shaft 230' may be rigid. The connector 220 ' and/or the stem 230 ' may also be resilient, such as the same material as the resilient seal 210 '. Illustratively, in embodiments where the connector 220 'is resilient, the connector 220' may protrude a little bit (i.e., be partially received within the tube slot 120 ') relative to the outside of the tube 100'. Thus, when the central tube is wrapped with a filter material, the connecting member 220' can be elastically deformed, so that the filter material can be easily attached to the central tube.

The sidewall of the tube body 100 'may further have a coupling hole 130'. The number, shape and position of the connection holes 130' on the side wall are not limited. The rod body 230 'may pass through the connection hole 130'. The rod body 230 ' may pass through the sidewall of the tube body 100 ' by passing through the connection hole 130 '. Thus, the elastic sealing member 210 ' may be previously put into the inner side of the sidewall, and then the rod body 230 ' may be inserted through the coupling hole 130 '. Illustratively, the second end of the shaft body 230 'is deformed by heat or any other suitable means to form the connector 220'. Through the arrangement, the design and processing requirements on the central tube are low, and the manufacturing cost is low.

In a third preferred embodiment, as shown in fig. 3A-3D, the one-way water passing assembly may include a resilient seal 210 ", a connector 220", and a stem 230 ". The stem 230 "may pass through the side wall of the body 100" by passing through the inlet opening 110 ". The first end of the stem 230 "may be connected to the elastomeric seal 210" by any suitable means, such as threading, snapping, welding, gluing, etc. The second end of the shaft 230 "may be connected to the connector 220" by any suitable means, such as threading, snapping, welding, gluing, etc. The first end and the second end may be oppositely disposed. The connector 220 "may be located on the outside of the tube 100". The stem 230 "may also be integrally formed with one or both of the connector 220" and the elastomeric seal 210 ". Alternatively, the connector 220 "may be further connected to the outer sidewall of the tube 100" by ultrasonic welding, gluing, or the like. Alternatively, the sidewall of body 100 "may be clamped between connector 220" and elastomeric seal 210 "to secure elastomeric seal 210". In the embodiment shown in the figures, the connector 220 "is block-shaped. In other embodiments not shown in the figures, the connector 220 "may have any other suitable shape. The wall of the inlet hole 110 "and the side wall of the rod 230" have a gap therebetween. Water can flow between the inside and outside of the sidewall of the tube body 100 "through the gap. Thus, a connecting hole is not required to be formed, and the structure of the pipe body 100' is simpler. In addition, by increasing the size of the water inlet hole 110 ", the elastic sealing member 210" can be pushed into the water inlet hole 110 "from the outside of the sidewall of the pipe body 100" by utilizing the characteristic of elasticity of the elastic sealing member 210 ", so that the elastic sealing member" seals the water inlet hole 110 "at the inside of the pipe body 100". Therefore, the one-way water passing assembly can be completely installed from the outer side of the pipe body 100', the production difficulty is further reduced, and the production efficiency is improved.

Further, as shown in fig. 3A-3D and 4A-4B, the outer sidewall of the tube 100 "may be provided with a tube groove 120". The connector 220 "may be fully or partially received within the body groove 120". The water inlet hole 110 "may extend from the bottom of the body groove 120" to the inner sidewall of the body 100 ". It should be noted that the water inlet hole 110 "is a portion between the bottom of the body groove 120" and the inner sidewall of the body 100 ", and a portion between the bottom of the body groove 120" and the opening is a sidewall of the body groove 120 ". Therefore, referring to fig. 4B, even though there is a case where the wall of the inlet hole 110 "and the sidewall of the body groove 120" are partially coplanar, it should be understood that the wall of the inlet hole 110 "and the sidewall of the body groove 120" are different. The water flow path can be formed between the connecting member 220 "and the wall (including the bottom and the side wall) of the body groove 120". The water flow passage may communicate between the notch of the body groove 120 "and the water inlet hole 110". Thus, water can flow in through the notch of the body groove 120 ", the water flow path, and the water inlet hole 110". That is, the presence of the connector 220 "does not cause the inlet opening 110" to be blocked. Illustratively, the water flow path may be formed in various ways, for example, the connection member 220 "may be placed against the water inlet hole 110" and block a portion of the water inlet hole 110 "such that the connection member 220" forms a water flow path with the sidewall of the pipe body groove 120 "; or the connector 220 "may be mounted on the inlet opening 110" such that the connector 220 "forms a water flow path with the sidewall and the bottom of the body groove 120". By this arrangement, it is easy to position the connection element 220 "and to fix the elastic sealing element 210" on the one hand; on the other hand, the outer side of the central tube is not provided with the convex part, so that the filter material can surround the central tube conveniently. The connector 220 "and the shaft 230" may be rigid. The connector 220 "and the stem 230" may also be resilient, such as the same material as the resilient seal 210 ". Illustratively, in embodiments where the connector 220 "is resilient, the connector 220" may protrude a little bit (i.e., be partially received within the body groove 120 ") outward of the body 100". Thus, when the central tube is surrounded by the filter material, the connecting member 220' can be elastically deformed, so that the filter material can be conveniently attached to the central tube.

Further, as shown in fig. 4B, the connector 220 "may have a shape adapted to the body groove 120". In this way, the position of the connector 220 "relative to the body groove 120" can be fixed. In the embodiment shown in the drawings, both ends of the connector 220 "are fitted into the body groove 120", and the middle of the connector 220 "and the sidewall of the body groove 120" may form a water flow passage. In other embodiments not shown, one end, the middle portion, or any other suitable position of the connector 220 "can be adapted to the tube slot 120", as long as the connector 220 "can be fixed relative to the tube slot 120". Through the arrangement, the situation that the unidirectional water passing assembly is separated from the expected position under the action of water pressure can be prevented, and the unidirectional water passing assembly is better positioned.

Preferably, the connector 220 "is rigid, while the shaft 230" is flexible. The connecting piece 220' has higher structural strength, is not easy to damage under the action of forward water pressure, and has higher reliability of the unidirectional water passing component. The shaft 230 "has a certain elasticity that allows for certain manufacturing tolerances. If shaft 230 "is rigid, the length of shaft 230" is exactly equal to the wall thickness of tube 100 "to ensure the sealing performance of elastomeric seal 210". Specifically, if the rod 230 "is too long, the elastic sealing element 210" may not be attached to the inner sidewall of the tube 100 "and water may leak from the one-way water passing assembly; if the rod 230 "is too short, it may result in the one-way water passing assembly not being installed on the tube 100'. When the rod 230 "has elasticity, its length can be changed within a certain range by its own elasticity, so that the rod 230" can be made slightly shorter during manufacturing, thereby ensuring the close contact of the elastic sealing member 210 ".

Alternatively, as shown in fig. 3A to 3D, a coupling groove 221 "may be provided on a sidewall of the coupling member 220" facing the pipe body 100 ". The opening size of the coupling groove 221 ″ may be smaller than the bottom size thereof. As shown in fig. 3C, the connection groove 221 ″ is a T-shaped groove. In other embodiments not shown, the connection slot 221 ″ may be a trapezoidal slot or an L-shaped slot, or the like. Preferably, the stem 230 "may be a resilient member integral with the resilient seal 210". Thus, the assembly steps can be reduced, the production efficiency can be improved, and the production cost can be reduced. The second end of the shaft 230 "may have a shape adapted to the coupling groove 221". The second end of the stem 230 "may be inserted into the connection slot 221". Thus, the rod body 230 "and the connector 220" can be conveniently connected together. Moreover, when the elastic sealing element 210 'is damaged after long-term use, the elastic sealing element 210' can be conveniently replaced, and the maintenance cost of the one-way water passing assembly is low.

The foregoing mainly describes differences between the various embodiments, and the same or similar reference numerals are used for the same or similar components of the various embodiments, and a detailed description of these same or similar components will not be provided herein for the sake of brevity.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

For ease of description, relative terms of regions such as "above … …", "above … …", "above … …", "above", and the like may be used herein to describe the regional positional relationship of one or more components or features with other components or features as illustrated in the figures. It is to be understood that the relative terms of the regions are intended to encompass not only the orientation of the element as depicted in the figures, but also different orientations in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (12)

1. The utility model provides a center tube for filter element group spare, its characterized in that, includes the body and is connected to one-way water passing component on the body, be provided with the inlet opening on the lateral wall of body, one-way water passing component includes elastic sealing element, elastic sealing element seals the inlet opening, elastic sealing element is used for taking place elastic deformation and making under forward hydraulic effect the inlet opening switches on.

2. The center tube for a filter element assembly of claim 1, wherein the one-way water passing assembly further comprises a connector and a rod, the elastic sealing member seals the water inlet hole at an inner side of the tube, the rod passes through a sidewall of the tube, a first end of the rod is connected to the elastic sealing member and a second end of the rod is connected to the connector, and the connector is located at an outer side of the tube.

3. The center tube for a filter element assembly of claim 2, wherein the rod body is inserted through the sidewall of the tube body by being inserted through the inlet opening with a gap between the wall of the inlet opening and the sidewall of the rod body.

4. The center tube for a filter element assembly as claimed in claim 3, wherein the outer side wall of the tube body is provided with a tube body groove, the connector is received in the tube body groove, the water inlet hole extends from the bottom of the tube body groove to the inner side wall of the tube body, and a water flow passage is formed between the connector and the wall of the tube body groove, the water flow passage communicating between the notch of the tube body groove and the water inlet hole.

5. A centre tube for a filter element assembly as claimed in claim 4, wherein the connector has a shape adapted to the tube body slot to fix the position of the connector relative to the tube body slot.

6. The center tube for a filter element assembly as claimed in claim 3, wherein the side wall of the connecting member facing the tubular body is provided with a connecting groove having an opening size smaller than a bottom size thereof, and the second end of the rod has a shape adapted to the connecting groove, and the second end of the rod is inserted into the connecting groove.

7. The center tube for a filter element assembly of claim 6, wherein said rod body and said resilient seal member are an integral resilient member.

8. The center tube for a filter element assembly as claimed in claim 2, wherein the side wall of the tube body is further provided with a connecting hole, and the rod body passes through the side wall of the tube body by passing through the connecting hole.

9. The center tube for a filter element assembly as claimed in claim 1, wherein the elastomeric seal member has a central portion connected to the tube body, the inlet openings are arranged in groups, the inlet openings in the groups are distributed around the central portion of the elastomeric seal member, and the elastomeric seal member simultaneously seals the inlet openings in the groups.

10. A filter element assembly comprising a central tube for a filter element assembly as claimed in any one of claims 1 to 9 and a filter material surrounding the central tube for a filter element assembly.

11. The filter element assembly of claim 10, wherein the filter material comprises a reverse osmosis membrane or a nanofiltration membrane.

12. A water purification machine comprising a filter element assembly according to any one of claims 10 to 11.

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