CN212532508U

CN212532508U - Filter element and water purifying device

Info

Publication number: CN212532508U
Application number: CN202021381015.4U
Authority: CN
Inventors: 印彩霞; 史林; 程兆山
Original assignee: AO Smith China Water Heater Co Ltd; AO Smith China Environmental Products Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd; AO Smith China Environmental Products Co Ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-02-12
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses a filter core and purifier, it relates to water treatment technical field, and the filter core includes: the filter core positioning mechanism comprises a first filter core mechanism, a second filter core mechanism and a limiting mechanism, wherein an accommodating cavity extending along the axial direction is formed in the inner side wall of the first filter core mechanism, and at least part of the accommodating cavity accommodates the second filter core mechanism; the first filter element mechanism is provided with a first operation part for mounting or dismounting the filter element on or from the water purifying device; the first operating part is close to the first end of the filter element; the second end of the filter element is provided with a water outlet unit which is connected with the water purifying device and is used for conveying inlet and outlet water; after second filter core mechanism installed to the chamber that holds of first filter core mechanism, stop gear can make and keep relatively fixed between first filter core mechanism and the second filter core mechanism in circumference. This application can realize changing whole filter core, only changes second filter core mechanism alone, only changes first filter core mechanism alone, and can effectively improve the integrated level of filter core, reduces purifier's volume.

Description

Filter element and water purifying device

Technical Field

The utility model relates to a water treatment technical field, in particular to filter core and purifier.

Background

In order to effectively improve purifier's life and water purification effect, all include multistage filter core in the present purifier and filter water in proper order. In the prior art, the multistage filter element mechanisms are generally arranged in two modes, the first mode is that each filter element forms an independent filter element mechanism and is respectively arranged on the shell of the water purifying device, and although the mode can realize the replacement of any filter element mechanism, the volume of the whole water purifying device is larger than that of a plurality of independent filter element mechanisms, and the integration level is not high enough. The second mode is that 2 or more than 2 filter cores form a composite filter core, and this mode has effectively reduced purifier's volume, has improved the integrated level, but user's oneself can't only directly change a certain filter core in the composite filter core basically, because a plurality of filter cores have formed an integral load filter core in the processing manufacture process, when changing, must change whole composite filter core, just so caused the waste of other usable partial filter cores in the composite filter core. Therefore, a new filter element is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides a filter core and purifier, and its realization that can convenient and fast changes whole filter core, only changes second filter core mechanism alone, only changes first filter core mechanism alone, and can effectively improve the integrated level of filter core, reduces purifier's volume.

The embodiment of the utility model provides a concrete technical scheme is:

a filter cartridge having first and second opposite ends, the filter cartridge comprising: the filter core positioning mechanism comprises a first filter core mechanism, a second filter core mechanism and a limiting mechanism, wherein an accommodating cavity extending along the axial direction is formed in the inner side wall of the first filter core mechanism, and at least part of the accommodating cavity accommodates the second filter core mechanism; the first filter element mechanism is provided with a first operation part for mounting or dismounting the filter element on or from the water purifying device; the first handle portion is proximate the first end of the cartridge; the second end of the filter element is provided with a water outlet unit which is connected with the water purifying device and is used for conveying inlet and outlet water;

after the second filter element mechanism is installed in the accommodating cavity of the first filter element mechanism, the limiting mechanism can enable the first filter element mechanism and the second filter element mechanism to be fixed relatively in the circumferential direction.

Preferably, the limiting mechanism comprises a second limiting part arranged on the second filter element mechanism and a first limiting part which is arranged on the first filter element mechanism and can be matched with the second limiting part; when the first limiting part is clamped with the second limiting part, the first filter element mechanism and the second filter element mechanism are kept relatively fixed in the circumferential direction.

Preferably, the first operating part comprises a first operating part mounted on an end surface of the first filter element mechanism close to the first end, and the first operating part has at least two states, and in the first state, the first operating part abuts against an end surface of the second filter element mechanism to limit the second filter element mechanism in the axial direction of the filter element so that the second filter element mechanism is fixed in the first filter element mechanism; in a second state, the first operating piece is separated from the end face of the second filter element mechanism so that the second filter element mechanism can be taken out of the accommodating cavity.

Preferably, one end of the first operating element is connected with the end face of the first filter element mechanism in a hinge manner, the other end of the first operating element is provided with a first clamping portion, the end face of the first filter element mechanism close to the first end is provided with a second clamping portion, and the first clamping portion can be clamped with the second clamping portion; when first joint portion with the second joint portion is when block, first operating part is followed the axis direction of filter core is in the projection has on the terminal surface of second filter core mechanism, so that first operating part is in first state.

Preferably, the projection of the first operating part onto the end face of the second filter element arrangement in the axial direction of the filter element covers at least one diameter of the second filter element arrangement.

Preferably, the cross section of the second filter element mechanism on the radial plane is circular, the cross section of the first filter element mechanism on the radial plane is circular, and the axis of the first filter element mechanism is the same as the axis of the second filter element mechanism.

Preferably, the second filter element mechanism has a second operating portion for mounting or dismounting the second filter element mechanism into or from the receiving cavity of the first filter element mechanism; the second handle portion is proximate the first end of the cartridge.

Preferably, the second operation portion includes: the second operating piece is arranged on the end surface, close to the first end, of the second filter element mechanism; the second filter element mechanism is provided with a concave part on the end face close to the first end, and the second operating piece can rotate around the diameter on the end face of the second filter element mechanism to enable the second operating piece to be embedded into the concave part or protrude out of the end face of the second filter element mechanism.

Preferably, the first filter element mechanism has a first threaded portion at an end thereof adjacent the second end.

Preferably, the first filter cartridge mechanism includes a first housing including an inner sidewall forming the housing chamber, and a first filter unit disposed in the first housing.

Preferably, the first filtering unit is a reverse osmosis membrane filtering unit or a nanofiltration membrane filtering unit.

Preferably, the first housing further comprises an isolation sleeve arranged in the inner side wall, a first flow passage is formed between the isolation sleeve and the inner side wall, and a through hole communicated with the first flow passage is formed in the inner side wall.

Preferably, the nozzle unit comprises a first nozzle unit opening on the first housing; the first nozzle unit comprises a fifth port, a sixth port and a seventh port which are arranged on the first shell; the outer side wall of the first filtering unit is a wastewater outlet, the inner side wall of the first filtering unit is a purified water outlet, and the end part of the first filtering unit is a raw water inlet; the raw water inlet is communicated with the fifth port, the purified water outlet is communicated with the sixth port through the through hole and the first flow channel, and the waste water outlet is communicated with the seventh port.

Preferably, the second filter element mechanism comprises a second shell, a shell arranged in the second shell, a central tube arranged in the shell, a front filter unit and a rear filter unit, wherein a second flow passage is formed between the shell and the second shell; the front-mounted filter unit is sleeved outside the central tube, and one end of the central tube is communicated with the water outlet end of the rear-mounted filter unit; the front filtering mechanism and the rear filtering mechanism are arranged in a vertical direction.

Preferably, the nozzle unit comprises a second nozzle unit opened on the second housing; the second nozzle unit comprises a first port, a second port and a fourth port which are arranged on the second shell, and the shell is provided with a third port;

an annular space is formed between the outer side wall of the front filter unit and the shell, the outer side wall of the front filter unit is an inlet end, and the first port is communicated with the annular space; the inner side wall of the front-mounted filtering mechanism is an outlet end, and the outlet end is communicated with the second port; and the fourth port is communicated with the water inlet end of the rear filtering unit through a second flow channel and the third port.

Preferably, the second filter cartridge mechanism comprises: the central pipe, the front filter unit and the rear filter unit are provided with a second shell; the front filtering unit is sleeved outside the central tube, the front filtering mechanism and the rear filtering mechanism are arranged in a vertical direction, and one end of the central tube is connected to the second shell to be communicated with the water outlet end of the rear filtering unit; an annular space is formed among the front filtering unit, the rear filtering unit and the inner side wall of the first filter element mechanism, and the annular space is divided into a first annular space and a second annular space which are independent; first filter core mechanism includes first casing and sets up first filter unit in the first casing, first casing includes the inside wall, the through-hole has been seted up on the inside wall, the through-hole with the second ring empty phase intercommunication.

Preferably, the nozzle unit comprises a first nozzle unit and a second nozzle unit; the second nozzle unit comprises a first port and a second port, and the second housing has a third port thereon; the first water gap unit comprises a fifth port and a seventh port which are arranged on the first shell, the outer side wall of the first filtering unit is a wastewater outlet, the inner side wall of the first filtering unit is a purified water outlet, and the end part of the first filtering unit is a raw water inlet; the raw water inlet is communicated with the fifth port, and the waste water outlet is communicated with the seventh port;

the first annulus is arranged between the outer side wall of the front filtering unit and the inner side wall of the first shell, the outer side wall of the front filtering unit is an inlet end, and the first port is communicated with the first annulus; the inner side wall of the front-mounted filtering mechanism is an outlet end, and the outlet end is communicated with the second port;

the water purification outlet is communicated with the water inlet end of the rear filtering unit through the through hole of the inner side wall, the second annular space and the third port.

Preferably, the post-filter unit comprises: the microfiltration filter element and the active carbon, wherein the incoming water firstly passes through the active carbon and then passes through the microfiltration filter element.

Preferably, the pre-filter mechanism has an inlet end, and the post-filter mechanism has an outlet end;

the second filter cartridge mechanism further comprises: and one end of the communicating mechanism is communicated with the inlet end, the other end of the communicating mechanism is communicated with the water outlet end, and the communicating mechanism can be communicated from the direction of the water outlet end to the direction of the inlet end.

Preferably, the communication mechanism comprises a one-way valve, an inlet of the one-way valve is communicated with the water outlet end, and an outlet of the one-way valve is communicated with the inlet end.

Preferably, when the second filter element mechanism comprises a second shell, a shell arranged in the second shell, a central pipe arranged in the shell, a front filter unit and a rear filter unit, the shell comprises a first shell for accommodating the front filter unit and a second shell for accommodating the rear filter unit, and the upper end of the second shell is hermetically connected with the lower end of the first shell; the side wall of the second shell is provided with a recess, the communication mechanism is arranged in the recess, and the second shell is provided with a through hole for communicating the recess with the water outlet end.

Preferably, an annular space is arranged between the outer side wall of the front filter unit and the shell; the first shell is sleeved outside the second shell, a gap is formed between the side wall of the uppermost end of the second shell and the inner wall of the first shell, and the recess is communicated with the annular space through the gap;

the middle part of the upper end of the second shell is provided with an opening communicated with the water outlet end, and the central tube is inserted in the opening.

A water purification device, comprising: a main chassis having a cavity thereon; the filter cartridge of any one of the above claims, wherein the filter cartridge is disposable in the chamber by grasping the first handle portion to remove the filter cartridge from the main housing.

Preferably, the filter cartridge is switched between the locked state and the unlocked state by rotating the first operating member about the axis of the filter cartridge.

Preferably, the first filter element mechanism is provided with a first thread part at one end close to the second end, the main machine shell is provided with a second thread part matched with the first thread part, and when the first operating piece is rotated, the first thread part is screwed with or separated from the second thread part, so that the filter element and the main machine shell are switched between a locking state and an unlocking state.

Preferably, the water purification apparatus further comprises: a pressure boosting device; and when the filter element and the main machine shell are in a locked state, each interface in the interface unit is butted with the first water port unit of the first filter element mechanism and/or the second water port unit of the second filter element mechanism, so that the second port is communicated with the inlet of the pressurizing device, and the outlet of the pressurizing device is communicated with the fifth port.

Preferably, when the first nozzle unit includes a sixth port and the second nozzle unit includes a fourth port, the sixth port is in communication with the fourth port.

The technical scheme of the utility model following beneficial effect that is showing has:

the mouth of a river unit of filter core is located the second end of filter core in this application, so, whole filter core can be direct swift convenient insert the second end to purifier's host computer shell in and accomplish the butt joint in water route between filter core and the host computer shell, also can be swift convenient take out the filter core from purifier's host computer shell from first end through first operation portion to the realization is swiftly changed whole filter core. When only need change second filter core mechanism, the user can take out second filter core mechanism from the chamber that holds of first filter core mechanism, then installs into new second filter core mechanism and carries out circumference spacing with stop gear again, so alright realize only the change to second filter core mechanism. When only the first filter element mechanism needs to be replaced, the filter element is taken out of the main machine shell of the water purifying device from the first end through the first operation part, the second filter element mechanism is taken out of the accommodating cavity of the first filter element mechanism, the taken-out second filter element mechanism is installed in a new first filter element mechanism and is circumferentially limited through the limiting mechanism, finally, the new first filter element mechanism with the second filter element mechanism is installed into the main machine shell of the water purifying device through the first operation part, and the water gap unit at the second end of the filter element is directly butted with the water purifying device; the first filter element mechanism can be detached from the water purifying device alone, and the second filter element mechanism is sleeved with the new first filter element mechanism and is installed on the water purifying device, so that only the first filter element can be replaced. Therefore, the whole filter element can be conveniently and quickly replaced through the process, the second filter element mechanism is replaced independently, and the first filter element mechanism is replaced independently. In addition, because the second filter element mechanism is detachably arranged in the accommodating cavity of the first filter element mechanism, the second filter element mechanism and the accommodating cavity can form a whole, so that the integration level of the filter element is effectively improved.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. 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, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

Fig. 1 is a schematic view of a second filter element mechanism of a filter element of an embodiment of the present invention detachably mounted in a receiving cavity of a first filter element mechanism;

fig. 2 is a schematic view of the embodiment of the present invention after the limiting mechanism keeps the first filter element mechanism and the second filter element mechanism relatively fixed;

fig. 3 is a schematic view illustrating the second filter element mechanism of the embodiment of the present invention being capable of being taken out of the accommodating chamber of the first filter element mechanism;

FIG. 4 is a cross-sectional view of a filter cartridge according to an embodiment of the present invention, in a first embodiment;

FIG. 5 is a cross-sectional view of a second embodiment of a filter cartridge in an embodiment of the present invention;

fig. 6 is a schematic view of the filter element installed in the water purifying device according to the embodiment of the present invention.

Reference numerals of the above figures:

1. a first end; 2. a second end; 3. a first filter element mechanism; 31. an accommodating chamber; 32. a first operation section; 33. a first nozzle unit; 331. a fifth port; 332. a sixth port; 333. a seventh port; 34. a second clamping part; 35. a first housing; 351. an inner sidewall; 3511. a through hole; 352. an isolation sleeve; 353. a first flow passage; 36. a first threaded portion; 37. a first filter unit; 4. a second filter element mechanism; 41. a second operation section; 42. a second nozzle unit; 421. a first port; 422. a second port; 423. a fourth port; 43. a recessed portion; 44. a second housing; 45. a housing; 451. a third port; 452. a first housing; 453. a second housing; 4531. recessing; 46. a central tube; 47. a pre-filter unit; 471. a support framework; 48. a post-filtration unit; 49. a second flow passage; 410. a communicating mechanism; 51. a first limiting part; 52. a second limiting part; 6. a first operating member; 61. a first clamping part; 7. a second operating member; 81. a first annulus; 82. a second annulus; 100. a filter element; 200. a main chassis; 2001. a chamber.

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. 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," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique 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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to change whole filter core 100 in order to realize convenient and fast, only change second filter core mechanism 4 alone, only change first filter core mechanism 3 alone, and can effectively improve the integrated level of filter core 100, reduce purifier's volume, proposed a filter core 100 in this application, fig. 1 is the utility model discloses in the embodiment second filter core mechanism demountable installation in the filter core to the schematic diagram that holds in the chamber of first filter core mechanism, fig. 2 is the utility model discloses in the embodiment stop gear will first filter core mechanism with keep the schematic diagram after the relative fixation between the second filter core mechanism, as shown in fig. 1 and fig. 2, filter core 100 has mutually opposite first end 1 and second end 2, and filter core 100 can include: the filter comprises a first filter element mechanism 3, a second filter element mechanism 4 and a limiting mechanism, wherein an accommodating cavity 31 extending along the axial direction is formed in the inner side wall 351 of the first filter element mechanism 3, and the accommodating cavity 31 at least partially accommodates the second filter element mechanism 4; the first filter element mechanism 3 has a first operation part 32 for attaching or detaching the filter element 100 to or from the water purifying apparatus; said first operating portion 32 is close to said first end 1 of said cartridge 100; the second end 2 of the filter element 100 is provided with a water inlet unit connected with the water purifying device and used for conveying inlet and outlet water; after the second filter element mechanism 4 is installed in the accommodating cavity 31 of the first filter element mechanism 3, the limiting mechanism can enable the first filter element mechanism 3 and the second filter element mechanism 4 to be kept relatively fixed in the circumferential direction.

The mouth of a river unit of filter core 100 all is located filter core 100's second end 2 in this application, so, whole filter core 100 can be direct swift convenient insert second end 2 to purifier's main case 200 and accomplish the butt joint in water route between the main case 200 of filter core 100, also can be swift convenient take out filter core 100 from purifier's main case 200 from first end 1 through first operation portion 32 to the realization is swiftly changed whole filter core 100. When only need change second filter core mechanism 4, the user can take out second filter core mechanism 4 from the chamber 31 that holds of first filter core mechanism 3, then installs into new second filter core mechanism 4 and carries out circumference spacing with stop gear again, so alright realize only the change to second filter core mechanism 4. When only the first filter element mechanism 3 needs to be replaced, the filter element 100 is taken out of the main machine shell 200 of the water purifying device from the first end 1 through the first operating part 32, the second filter element mechanism 4 is taken out of the accommodating cavity 31 of the first filter element mechanism 3, the taken-out second filter element mechanism 4 is installed in a new first filter element mechanism 3 and is circumferentially limited through the limiting mechanism, finally, the new first filter element mechanism 3 with the second filter element mechanism 4 is installed in the main machine shell 200 of the water purifying device through the first operating part 32, and the water gap unit at the second end of the filter element is directly butted with the water purifying device; or only the first filter element mechanism 3 can be detached from the water purifying device, and then the second filter element mechanism 4 is sleeved with a new first filter element mechanism 3 and is installed on the water purifying device, so that only the first filter element 100 can be replaced. Therefore, the whole filter element 100 can be replaced conveniently and quickly through the process, only the second filter element mechanism 4 is replaced independently, and only the first filter element mechanism 3 is replaced independently. In addition, because the second filter element mechanism 4 is detachably arranged in the accommodating cavity 31 of the first filter element mechanism 3, the two can form a whole, and thus the integration level of the filter element 100 is effectively improved.

The replacement of the first filter cartridge mechanism 3 and the second filter cartridge mechanism 4 in the present application is not limited to the above-described manner, and other manners or structures capable of performing replacement may be used, and is not limited in any way in the present application.

The first filter element mechanism 3 and the second filter element mechanism 4 can be installed on a fixed waterway plate of the water purifying device, and the communication between the fourth port 423 and the sixth port 332 is realized through the fixed waterway plate; it is also possible to attach a detachable mechanism to the water purification apparatus, and the communication between the fourth port 423 and the sixth port 332 is realized by the detachable mechanism.

To provide a better understanding of the filter cartridge 100 of the present application, it will be further explained and illustrated below. As shown in fig. 1-2, the filter cartridge 100 has a first end 1 and a second end 2 opposite to each other, the first end 1 being an upward end, and the second end 2 being a downward end. The filter cartridge 100 includes: first filter core mechanism 3, second filter core mechanism 4 and stop gear. The inner side wall 351 of the first filter element mechanism 3 is formed with a containing cavity 31 extending along the axial direction, specifically, the first filter element mechanism 3 comprises a first housing 35 and a first filter unit 37 arranged in the first housing 35, the first housing 35 comprises the inner side wall 351, the outer side wall, an upper end cover and a lower end cover, and the inner side wall 351 is formed with the containing cavity 31. The opening of the accommodating cavity 31 is located at the end face of the first filter element mechanism 3 close to the first end 1, and the second filter element mechanism 4 can be installed into the accommodating cavity 31 from the end of the first filter element mechanism 3 close to the first end 1. The opening of the receiving chamber 31 can also be located at the end face of the first filter element arrangement 3 close to the second end 2, and the second filter element arrangement 4 can be inserted into the receiving chamber 31 from the end of the first filter element arrangement 3 close to the second end 2.

As shown in fig. 1 and 2, the end surface of the first filter element mechanism 3 near the first end 1 is provided with a first operating part 32 for mounting or dismounting the first filter element mechanism 3 on or from the water purifying apparatus, and the first operating part 32 can be used for a user to hold or operate the first filter element mechanism 3, can be a first operating part 6, and can also be a shape, such as a concave bayonet or a convex shape, and the like, formed on the first filter element mechanism 3 near the first end 1 and used for the user to hold and operate the first filter element mechanism 3.

As shown in fig. 1 and 2, the second filter element means 4 is shaped to match the receiving chamber 31. In a possible embodiment, the end surface of the second filter element mechanism 4 close to the first end 1 has a second operating portion 41 for installing the second filter element mechanism 4 in the accommodating cavity 31 of the first filter element mechanism 3 or removing the second filter element mechanism 4 from the accommodating cavity 31 of the first filter element mechanism 3, and a user can hold the second operating portion 41 so as to conveniently pull out the second filter element mechanism 4 from the accommodating cavity 31 of the first filter element mechanism 3 from the end close to the first end 1 for the purpose of removal. The second operating portion 41 can be a shape for operating the second filter mechanism 4 by a user, and can be a second operating member 7, or can be a shape for operating the second filter mechanism 4 by a user, such as a concave bayonet or a convex shape, formed at one end of the second filter mechanism 4, and the second operating portion 41 is preferably located at one end of the second filter mechanism 4 close to the first end 1, and particularly can be located on an end surface, so as not to affect the installation of the second filter mechanism 4 into the accommodating cavity 31.

The second end 2 of the cartridge 100 has a water outlet unit for delivering inlet and outlet water connected to the water purification device. In a possible embodiment, the nozzle unit may comprise a first nozzle unit 33 provided on the first filter element mechanism 3, a second nozzle unit 42 provided on the second filter element mechanism 4. The first nozzle unit 33 may open on said first housing 35. The second nozzle unit 42 may open onto the second housing 44. Fig. 6 is a schematic diagram of the installation of the filter element into the water purifying device in the embodiment of the present invention, as shown in fig. 6, after the second filter element mechanism 4 is located in the first filter element mechanism 3, the second end 2 of the whole filter element 100 can be directly installed into the cavity 2001 on the main housing 200 of the water purifying device, and the first water gap unit 33 and the second water gap unit 42 at the second end 2 of the filter element 100 can be directly and conveniently butted with the water channel of the main housing 200, without affecting the detachment or installation of the filter element 100.

As shown in fig. 1 and 2, after the second filter element mechanism 4 is installed in the accommodating cavity 31 of the first filter element mechanism 3, the limiting mechanism makes the first filter element mechanism 3 and the second filter element mechanism 4 relatively fixed in the circumferential direction, and the second filter element mechanism 4 and the first filter element mechanism 3 cannot rotate, so that different ports of the whole water gap unit are communicated with the water purifying device in a one-to-one butt joint manner. The limiting mechanism can have various different embodiments, and the limiting mechanism can comprise a second limiting part 52 arranged on the second filter element mechanism 4, and a first limiting part 51 arranged on the first filter element mechanism 3 and capable of being matched with the second limiting part 52; when the first limiting part 51 is engaged with the second limiting part 52, the first filter element mechanism 3 and the second filter element mechanism 4 are circumferentially kept relatively fixed. For example, the first stopper portion 51 may be a recess portion provided on an inner side wall of the first filter element mechanism 3, and the second stopper portion 52 may be a projection portion provided on an outer side wall of the second filter element mechanism 4, and when the projection portion is engaged with the recess portion, the first filter element mechanism 3 and the second filter element mechanism 4 are held relatively fixed in the circumferential direction and are not rotatable. For another example, the limiting mechanism may include a first limiting portion 51, which may be a protruding rib extending in a diameter direction, disposed on an end surface of the second filter element mechanism 4 close to the first end 1; the first operating member 6 of the first filter element mechanism 3 is provided with a second limiting portion 52 which is matched with the first limiting portion 51 and can be concave. When the first operating member 6 is in the first state, the first limiting portion 51 is aligned with the second limiting portion 52 so that the second filter element mechanism 4 is at a correct specific angle, which facilitates the water path docking of the second water gap unit 42 of the second filter element mechanism 4 with the interface unit of the water purifying device main case 200, and in addition, the first filter element mechanism 3 and the second filter element mechanism 4 can be kept relatively fixed in the circumferential direction.

In a preferred embodiment, as shown in fig. 1 and 2, the first operating part 32 may include a first operating member 6 mounted on an end surface of the first filter element mechanism 3 near the first end 1, the first operating member 6 having at least two states, in the first state, the first operating member 6 abuts against an end surface of the second filter element mechanism 4 to limit the second filter element mechanism 4 in the axial direction of the filter element 100 so that the second filter element mechanism 4 is fixed in the first filter element mechanism 3; fig. 3 is a schematic view illustrating that the second filter element mechanism can be taken out from the accommodating cavity of the first filter element mechanism according to the embodiment of the present invention, and as shown in fig. 3, in the second state, the first operating member 6 is separated from the end surface of the second filter element mechanism 4 so that the second filter element mechanism 4 can be taken out from the accommodating cavity 31.

Specifically, as shown in fig. 1 to 3, one end of the first operation member 6 is connected to an end surface of the first filter element mechanism 3 close to the first end 1 in a hinge manner, the other end of the first operation member 6 has a first engaging portion 61, the end surface of the first filter element mechanism 3 close to the first end 1 has a second engaging portion 34, and the first engaging portion 61 can engage with the second engaging portion 34. The first operating member 6 can be rotated in a hinge connection manner, so that the first operating member 6 abuts against the end surface of the second filter element mechanism 4 in the first state, and the first operating member 6 is separated from the end surface of the second filter element mechanism 4 in the second state, so that the second filter element mechanism 4 can be taken out of the accommodating cavity 31. When first joint portion 61 and second joint portion 34 were in the same place the block, first operating parts 6 realized fixing, can guarantee to carry on spacingly so that second filter core mechanism 4 fixes in first filter core mechanism 3 to second filter core mechanism 4, when needs take out second filter core mechanism 4, only need artificially rotate first operating parts 6 for first joint portion 61 breaks away from with second joint portion 34 mutually can.

When the first engaging portion 61 engages with the second engaging portion 34, the first operating member 6 has a projection on the end surface of the second filter element mechanism 4 along the axial direction of the filter element 100, so that the first operating member 6 is in the first state. This ensures that the first actuating element 6 can at least partially abut against the end face of the second filter insert arrangement 4. Generally speaking, the cross section of the second filter element mechanism 4 on the radial plane is circular, the cross section of the first filter element mechanism 3 on the radial plane is circular ring-shaped, and the axis of the first filter element mechanism 3 is the same as the axis of the second filter element mechanism 4. When the cross section of the first filter element mechanism 3 on the radial plane is circular, the filter element 100 can be locked and unlocked with the water purifying device main case 200 in a rotating manner, and the filter element 100 can also be directly installed in the water purifying device main case 200 at any angle, so that a user does not need to align the shape. Similarly, the second filter element mechanism 4 can be directly installed in the accommodating cavity 31 of the first filter element mechanism 3 at any angle, and the shape cannot be adjusted.

Preferably, the projection of the first actuating portion 32 onto the end face of the second filter insert arrangement 4 in the axial direction of the filter insert 100 covers at least one diameter of the second filter insert arrangement 4. In this way, the user can conveniently rotate the filter element 100 with less effort after holding the first operating part 32.

When the first engaging portion 61 engages with the second engaging portion 34, the user can hold the first operating member 6 to operate the entire filter cartridge 100, and the first filter cartridge mechanism 3 is mounted on or detached from the water purifying apparatus. In the above embodiment, the first operating member 6 can serve as the first operating portion 32 and can also limit and fix the second filter element mechanism 4 in the axial direction.

In one possible embodiment, as shown in fig. 1, the second operating portion 41 may include: and a second operating member 7 mounted on the end surface of the second filter element mechanism 4 adjacent to the first end 1. The user can hold the second operating member 7 to remove the second filter element mechanism 4 from the receiving chamber 31 of the first filter element mechanism 3. Preferably, the second filter element means 4 has a recess 43 on its end face adjacent to the first end 1, and the second operating member 7 can be rotated about a diameter on the end face of the second filter element means 4 to engage itself in the recess 43 or project from the end face of the second filter element means 4. When the second operating member 7 is inserted into the recess 43, the end surface of the second filter element mechanism 4 close to the first end 1 is substantially flush with the end surface of the first filter element mechanism 3 close to the first end 1, which helps the first operating member 6 to abut against the end surface of the second filter element mechanism 4 to limit the position of the second filter element mechanism 4 in the axial direction of the filter element 100, so that the second filter element mechanism 4 is fixed in the first filter element mechanism 3.

The first filter unit 37 in the first filter element mechanism 3 and the filter unit in the second filter element mechanism 4 may be any kind of filter unit, and are not limited in any way in this application.

Preferably, fig. 4 is a cross-sectional view of the filter element in the first embodiment of the present invention, and as shown in fig. 4, the first filtering unit 37 may be a reverse osmosis membrane filtering unit or a nanofiltration membrane filtering unit. The first housing 35 may include an isolation sleeve 352 disposed in the inner sidewall 351, a lower end of the isolation sleeve 352 is sealed with the inner sidewall 351, a first flow passage 353 is formed between the isolation sleeve 352 and the inner sidewall 351, and the inner sidewall 351 has a through hole 3511 communicating with the first flow passage 353. The first filter element mechanism 3 has a first nozzle unit 33, the first nozzle unit 33 including a fifth port 331, a sixth port 332, and a seventh port 333 which are opened in the first housing 35; the outer side wall of the first filtering unit 37 is a waste water outlet, the inner side wall 351 of the first filtering unit 37 is a purified water outlet, and the end part of the first filtering unit 37 is a raw water inlet; the raw water inlet is communicated with the fifth port 331, the purified water outlet is communicated with the sixth port 332 through the through hole 3511 and the first flow passage 353, and the waste water outlet is communicated with the seventh port 333.

Corresponding to the first filter cartridge mechanism 3, as shown in fig. 4, the second filter cartridge mechanism 4 may include a second housing 44, a casing 45 provided in the second housing 44, a center tube 46 provided in the casing 45, a front filter unit 47, and a rear filter unit 48. The second housing 44 encloses the other components of the second filter cartridge mechanism 4, including the housing 45. A second flow passage 49 is formed between the outer shell 45 and the second housing 44. The front filter unit 47 is sleeved outside the central tube 46, and one end of the central tube 46 is communicated with the water outlet end of the rear filter unit 48. The front-mounted filtering mechanism and the rear-mounted filtering mechanism are arranged in a vertical direction. The second nozzle unit 42 comprises a first port 421, a second port 422 and a fourth port 423, which open on the second housing 44. The housing 45 has a third port 451 thereon; an annular space is formed between the outer side wall of the front filtering unit 47 and the shell 45, the outer side wall of the front filtering unit 47 is an inlet end, and the first port 421 is communicated with the annular space; the inner side wall 351 of the pre-filter mechanism is an outlet end which is communicated with the second port 422; the fourth port 423 is communicated with the water inlet end of the post-filter unit 48 through the second flow passage 49 and the third port 451.

Specifically, the pre-filter unit 47 has an inlet end and an outlet end, and the post-filter unit 48 has an inlet end and an outlet end. The pre-filter unit 47 is used to primarily filter the water to remove larger particles of impurities from the water. The pre-filter unit 47 may be substantially tubular, an annular space is provided between the outer side wall of the pre-filter unit 47 and the housing 45, the outer side wall of the pre-filter unit 47 is an inlet end, and the first port 421 communicates with the annular space. The water flows from the first port 421 of the second housing 44 into the second filter element mechanism 4, and then reaches the annular space, and then enters the pre-filter unit 47 from the outer side wall of the pre-filter unit 47 for filtering. The inner sidewall 351 of the pre-filter unit 47 is an outlet end, which communicates with the second port 422. The water filtered by the pre-filter unit 47 flows out of the inner side wall 351 and then flows out of the second filter element mechanism 4 through the second port 422 of the second housing 44.

In a feasible implementation manner, a supporting framework 471 with a hollow structure may be disposed inside the front filter unit 47, the front filter unit 47 is sleeved on the supporting framework 471, the supporting framework 471 is used for radially supporting the front filter unit 47, and on the other hand, water flowing out from the inside of the front filter unit 47 can pass through the supporting framework 471 to continue flowing upwards, and then flows to the second port 422 of the second housing 44 to flow out. The third port 451 is in communication with the water inlet of the post-filter unit 48. The water outlet pipe is used for guiding the water filtered by the post-filter unit 48 to pass through the pre-filter unit 47 and finally to be discharged out of the second filter element mechanism 4. When the supporting frame 471 is present, the central tube 46 may be inserted through the supporting frame 471, and a gap may be formed between the central tube 46 and the supporting frame 471, so as to facilitate the upward flow of water flowing out from the inside of the pre-filter unit 47. The water flowing out of the second filter element mechanism 4 flows into the fifth port 331 of the first filter element mechanism 3, enters the raw water inlet at the end of the first filter unit 37, and the formed wastewater flows out of the wastewater outlet on the outer side wall of the first filter unit 37 and then is discharged out of the second filter element mechanism 4 through the seventh port 333 on the first housing 35. The formed purified water flows out from the purified water outlet of the inner sidewall 351 of the first filter unit 37, passes through the through hole 3511 of the inner sidewall 351, the first flow passage 353 between the isolation sleeve 352 and the inner sidewall 351, and finally flows out from the sixth port 332 of the first housing 35.

The purified water flowing out of the first filter element mechanism 3 flows into the second flow passage 49 between the casing 45 and the second casing 44 through the fourth port 423 of the second casing 44 and the third port 451 at the lower end of the casing 45 to reach the water inlet end of the post-filter unit 48. The purified water is filtered by the post-filter unit 48, flows out upwards from the water outlet end of the post-filter unit 48 to the central tube 46, and is discharged upwards out of the second filter element mechanism 4 through the central tube 46.

Preferably, fig. 5 is a cross-sectional view of the filter element in the embodiment of the present invention in the second embodiment, and as shown in fig. 5, the present embodiment is different from the first embodiment in that: the second filter element mechanism 4 includes: a central tube 46, a pre-filter unit 47, a post-filter unit 48 with a second housing 453. An annular space is formed between the front filter unit 47, the rear filter unit 48 and the inner side wall 351 of the first filter element mechanism 3, and the annular space is divided into a first annular space 81 and a second annular space 82 which are independent. For example, the annular space is partitioned into separate first and second annuli 81 and 82 by an annular partition in the sidewall of the second housing 453. The first filter element mechanism 3 includes a first housing 35 and a first filter unit 37 disposed in the first housing 35, the first housing 35 includes an inner sidewall 351, a through hole 3511 is opened on the inner sidewall 351, and the through hole 3511 is communicated with the second annulus 82. The first nozzle unit 33 includes a fifth port 331 and a seventh port 333 opened in the first housing 35, the raw water inlet communicates with the fifth port 331, and the waste water outlet communicates with the seventh port 333. The second nozzle unit 42 comprises a first port 421 and a second port 422, and since the pre-filter unit 47 has no separate housing cover of its own, the first port 421 and the second port 422 can be opened directly on the first housing 35. A first annulus 81 is arranged between the outer side wall of the front filtering unit 47 and the inner side wall 351 of the first shell 35, the outer side wall of the front filtering unit 47 is an inlet end, and the first port 421 is communicated with the first annulus 81. The inner sidewall 351 of the pre-filter mechanism is an outlet end that communicates with the second port 422. The purified water outlet is communicated with the water inlet end of the rear filter unit 48 through the through hole 3511 of the inner side wall 351, the second annular space 82 and the third port 451.

In the second embodiment, water may flow from the first port 421 of the first housing 35 into the first annulus 81 between the outer sidewall of the pre-filter unit 47 and the inner sidewall 351 of the first housing 35, and then enter the pre-filter unit 47 from the outer sidewall of the pre-filter unit 47 for filtering. The inner sidewall 351 of the pre-filter unit 47 is an outlet end, which communicates with the second port 422. The water filtered by the pre-filter unit 47 flows out from the inner sidewall 351 and then flows out through the second port 422 of the first housing 35. Then, the water passing through the pre-filter unit 47 flows into the fifth port 331 of the first filter element mechanism 3, enters the raw water inlet at the end of the first filter unit 37, and the formed waste water flows out from the waste water outlet on the outer side wall of the first filter unit 37, and then is discharged out of the second filter element mechanism 4 through the seventh port 333 of the first housing 35. The formed purified water flows out from the purified water outlet of the inner side wall 351 of the first filtering unit 37, and then flows to the water inlet end of the post-filtering unit 48 through the through hole 3511 of the inner side wall 351 of the first casing 35, the second annular space 82 and the third port 451 of the second casing 453. The purified water is filtered by the post-filter unit 48, flows out upwards from the water outlet end of the post-filter unit 48 to the central tube 46, and is discharged upwards out of the second filter element mechanism 4 through the central tube 46.

In the above embodiments, the post-filter unit 48 mainly functions to effectively remove organic substances, residual chlorine and other radioactive substances in the water, and has the effects of decoloring, removing peculiar smell and the like. In one possible embodiment, the post-filter unit 48 may comprise: the microfiltration filter element and the active carbon, wherein the incoming water firstly passes through the active carbon and then passes through the microfiltration filter element. The active carbon is mainly used for more thoroughly adsorbing the abnormal color and the peculiar smell in the purified water, adjusting the taste of the purified water and simultaneously inhibiting the regeneration of bacteria in the purified water. The microfiltration filter is mainly used for filtering micro-sized or nano-sized particles and bacteria in water.

In a preferred embodiment, the post-filter unit 48 may comprise: the first glue-spraying cotton and the second glue-spraying cotton are oppositely arranged. The first and second spray cottons extend in the horizontal direction, and the side walls thereof are closely attached to the inner wall of the second housing 453. The active carbon is granular and is arranged in the space between the first collodion cotton and the second collodion cotton. The first glue spraying cotton and the second glue spraying cotton are mainly used for limiting and containing granular active carbon. The second housing 453 may include a sealing cover at a lower end, and the third port 451 of the second housing 453 may be provided on the sealing cover. The sealing cap may be removably attached to facilitate replacement of the microfiltration filter and the activated carbon in the second housing 453. The water filtered by the first filter element mechanism 3 can flow into the second housing 453 through the third port 451 of the sealing cover, then flow through the first collodion to be filtered by the activated carbon, and then flow out of the first collodion to enter the microfiltration filter element. The lateral wall of the microfiltration filter element is an inlet, and after the microfiltration filter element is used for filtering, water flows out from the middle part of the upper end face of the microfiltration filter element and then flows into the central tube 46 to be discharged out of the second filter element mechanism 4.

Still proposed in this application is a water purification unit, water purification unit can include: a main chassis 200, the main chassis 200 having a cavity 2001 thereon; as with any of the cartridges 100 described above, the cartridge 100 can be disposed in the chamber 2001 by grasping the first operating portion 32 to detach the cartridge 100 from the main chassis 200.

In a specific manner, the user can grasp the first operating portion 32 formed by the first operating member 6, thereby taking out the filter cartridge 100 from the chamber 2001 in the main chassis 200 and detaching it. For example, the first filter cartridge mechanism 3 has a first screw portion 36 at an end thereof adjacent to the second end 2, and the main housing 200 has a second screw portion matching the first screw portion 36, and when the first operating member 6 is rotated, the first screw portion 36 is engaged with or disengaged from the second screw portion, so that the filter cartridge 100 and the main housing 200 are switched between the locked state and the unlocked state. In this manner, the filter cartridge 100 can be switched between the locked state and the unlocked state with the main cabinet 200 by holding the first operating member 6 and rotating the first operating member 6 about the axis of the filter cartridge 100. When the filter cartridge 100 and the main housing 200 are turned to the unlocked state, the first operating member 6 can be held to pull the filter cartridge 100 out of the chamber 2001 in the main housing 200. When a new filter cartridge 100 is installed in the chamber 2001 of the main housing 200, the filter cartridge 100 and the main housing 200 can be switched to a locked state in which the filter cartridge 100 cannot be detached from the main housing 200 by rotating the first operating member 6 about the axis of the filter cartridge 100 by holding the first operating member 6.

Also, the water purifying apparatus may include: a pressure boosting device and an interface unit. When the filter cartridge 100 and the main housing 200 are in the locked state, each of the interface units interfaces with the water port unit of the filter cartridge 100, for example, the first water port unit 33 of the first filter cartridge mechanism 3 and/or the second water port unit 42 of the second filter cartridge mechanism 4, so that the second port 422 communicates with the inlet of the pressure boosting device, and the outlet of the pressure boosting device communicates with the fifth port 331. In a possible embodiment, when the first nozzle unit 33 includes the sixth port 332 and the second nozzle unit 42 includes the fourth port 423, the sixth port 332 communicates with the fourth port 423. The water treated by the pre-filter unit 47 in the second filter element mechanism 4 can be pressurized by the pressurizing device and then input into the first filter element mechanism 3, so that the filtering speed of the first filter element mechanism 3 can be increased.

Only one filter element 100 needs to be installed on the main case 200 of the water purifying device in the application, and the filter element can be provided with the front-end filter unit 47, the reverse osmosis membrane filter unit or the nanofiltration membrane filter unit and the rear-end filter unit 48, so that the purification and filtration of different functions of raw water are realized, and the installation and the disassembly of the filter element 100 are very convenient and fast.

As shown in fig. 4, the second filter element mechanism 4 may further include: a communicating mechanism 410 with one end communicating with the inlet end and the other end communicating with the outlet end, wherein the communicating mechanism 410 can be communicated from the outlet end to the inlet end.

In one possible embodiment, the communication mechanism 410 may include a one-way valve having an inlet in communication with the water outlet and an outlet in communication with the inlet. The communicating mechanism 410 can only be communicated from the water outlet end to the inlet end in the above manner, so that the separation between raw water and purified water is realized in the normal water production process, and the raw water cannot flow to the water outlet end of the rear filtering unit 48 through the communicating mechanism 410 to be discharged for use by a user. Since the raw water contains foreign matters, which may cause the outlet of the check valve to be blocked or enter the check valve to cause the check valve to be blocked, the communication mechanism 410 may include a filter net disposed at the inlet and/or outlet of the check valve, so as to effectively avoid the above problems. After the foreign matter is intercepted by the filter screen, the communicating mechanism 410 can be detached periodically to clean the filter screen. In other possible embodiments, the communication mechanism 410 may be other components that can only communicate from the water outlet end to the water inlet end, and is not limited in this application.

When the first filter element means 3 filters to a certain extent, the dirt and impurities of the water will be deposited on the membranes of the first filter element 100 unit. When the water purifying device is in a standby state, the raw water on the raw water side of the membrane can slowly permeate the membrane to reach the water purifying side of the membrane, so that the TDS value of the water on the water purifying side is increased, and thus the TDS of the water just discharged is higher when the water purifying system is used for normally producing water for the next time. When the water purifying device needs to wash the first filter element 100 unit, the purified water passing through the post-filter unit 48 in the second filter element mechanism 4 can flow back to the inlet end of the pre-filter unit 47 in the second filter element mechanism 4 through the communicating mechanism 410, the part of the purified water flows out of the second filter element mechanism 4 after passing through the pre-filter unit 47 again, and then the membrane of the first filter element 100 unit of the first filter element mechanism 3 is washed, so that the raw water on the raw water side of the first filter element 100 unit is replaced by the purified water. After that, when the water purification apparatus is in the standby state, even if the purified water on the raw water side slowly permeates through the membrane to reach the purified water side of the membrane, the TDS value of the water on the purified water side will be greatly reduced. Through the process, the TDS (total dissolved solids) of part of water is effectively reduced when the water is discharged from the water purification system at the next time of normal water production.

In a preferred embodiment, the communication mechanism 410 can be conducted from the outlet end to the inlet end under a predetermined condition, which is when the water purifying device is not outputting purified water, i.e. when the water purifying device is flushing the second filter element mechanism 4, and the purified water is used to replace the raw water in the second filter element 100 unit. When the water purifying device is normally used for producing water and outputting purified water, the communicating mechanism 410 may be conducted from the water outlet end to the inlet end, or may be not conducted from the water outlet end to the inlet end.

Purifier in this application need not additionally to add the branch road water pipe that the water purification flows back, has effectively avoided the increase of purifier volume to make purifier's water route more succinct. The water purifier directly sets up the return water passageway in second filter core mechanism 4 is inside, through with the inside return water passageway of communicating mechanism 410 integrated to second filter core mechanism 4, thereby realize normally making the wall of water in-process raw water and water purification, realize in the washing process that the water purification that rearmounted filter unit 48 flows out can flow back to the entry end of leading filter unit 47 in second filter core mechanism 4 in the second filter core mechanism 4, and then wash first filter core mechanism 3 again, with the raw water of the raw water side in first filter core 100 unit replaced by the water purification.

As shown in fig. 4, in this embodiment, the housing 45 includes a first housing 452 for accommodating the front filter unit 47 and a second housing 453 for accommodating the rear filter unit 48, and an upper end of the second housing 453 is hermetically connected to a lower end of the first housing 452. The sidewall of the second housing 453 has a recess 4531, the communicating mechanism 410 is disposed in the recess 4531 and can be disposed along a horizontal direction or a vertical direction, and the second housing 453 has a through hole for communicating the recess 4531 with the water outlet end. The water filtered by the post-filter unit 48 can flow into the recess 4531 through the through hole of the second housing 453 and then can enter one end of the communication mechanism 410 near the center, that is, the inlet of the communication mechanism 410 is near the center of the housing 45 and the outlet of the communication mechanism 410 is near the side wall of the housing 45.

As shown in fig. 4, the first housing 452 is fitted over the second housing 453, a gap is formed between the uppermost sidewall of the second housing 453 and the inner wall of the first housing 452, and the recess 4531 communicates with the annular space through the gap. The water flowing out from the outlet of the communication mechanism 410 can enter the gap between the uppermost side wall of the second housing 453 and the inner wall of the first housing 452, and then flow upwards to the annular space between the outer side wall of the front filter unit 47 and the first housing 452, and through the above structure, the clean water flowing out from the rear filter unit 48 in the second filter element mechanism 4 can flow back to the inlet end of the front filter unit 47 in the second filter element mechanism 4 in the flushing process.

In another embodiment, as shown in fig. 5, only the rear filter unit 48 of the second filter cartridge arrangement 4 has a second housing 453. The communication mechanism 410 is mounted on the second housing 453. The second housing 453 has a through hole communicating with the water outlet end. The water filtered by the post-filter unit 48 can flow to the communication means 410 through the through hole of the second housing 453 and then can enter the communication means 410 to flow out from the outlet of the communication means 410, and the outlet of the communication means 410 is communicated with the first annulus 81. Through the structure, the purified water flowing out of the post-filter unit 48 in the second filter element mechanism 4 can flow back to the inlet end of the pre-filter unit 47 in the second filter element mechanism 4 in the flushing process.

All articles and references disclosed, including patent applications and publications, are hereby 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 materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of 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, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A filter cartridge having first and second opposite ends, the filter cartridge comprising: the filter core positioning mechanism comprises a first filter core mechanism, a second filter core mechanism and a limiting mechanism, wherein an accommodating cavity extending along the axial direction is formed in the inner side wall of the first filter core mechanism, and at least part of the accommodating cavity accommodates the second filter core mechanism; the first filter element mechanism is provided with a first operation part for mounting or dismounting the filter element on or from the water purifying device; the first handle portion is proximate the first end of the cartridge; the second end of the filter element is provided with a water outlet unit which is connected with the water purifying device and is used for conveying inlet and outlet water;

2. The filter cartridge of claim 1, wherein the limiting mechanism comprises a second limiting portion disposed on the second filter cartridge mechanism, a first limiting portion disposed on the first filter cartridge mechanism and capable of cooperating with the second limiting portion; when the first limiting part is clamped with the second limiting part, the first filter element mechanism and the second filter element mechanism are kept relatively fixed in the circumferential direction.

3. The filter cartridge according to claim 1, wherein the first operating part comprises a first operating member mounted on an end surface of the first filter cartridge mechanism near the first end, the first operating member having at least two states, in the first state, the first operating member abuts against an end surface of the second filter cartridge mechanism to limit the second filter cartridge mechanism in an axial direction of the filter cartridge so that the second filter cartridge mechanism is fixed in the first filter cartridge mechanism; in a second state, the first operating piece is separated from the end face of the second filter element mechanism so that the second filter element mechanism can be taken out of the accommodating cavity.

4. The filter element according to claim 3, wherein one end of the first operating member is connected with the end surface of the first filter element mechanism in a hinge manner, the other end of the first operating member is provided with a first clamping portion, the end surface of the first filter element mechanism close to the first end is provided with a second clamping portion, and the first clamping portion can be clamped with the second clamping portion; when first joint portion with the second joint portion is when block, first operating part is followed the axis direction of filter core is in the projection has on the terminal surface of second filter core mechanism, so that first operating part is in first state.

5. The filter cartridge of claim 4, wherein a projection of the first handle portion onto an end face of the second cartridge mechanism in an axial direction of the filter cartridge covers at least one diameter of the second cartridge mechanism.

6. The filter cartridge of claim 1, wherein the second filter cartridge mechanism has a circular cross-section in a radial plane, the first filter cartridge mechanism has a circular cross-section in a radial plane, and the first filter cartridge mechanism has the same axis as the second filter cartridge mechanism.

7. The filter cartridge of claim 1, wherein the second filter cartridge mechanism has a second operative portion for mounting or dismounting the second filter cartridge mechanism into or from the receiving cavity of the first filter cartridge mechanism; the second handle portion is proximate the first end of the cartridge.

8. The filter cartridge of claim 7, wherein the second handle portion comprises: the second operating piece is arranged on the end surface, close to the first end, of the second filter element mechanism; the second filter element mechanism is provided with a concave part on the end face close to the first end, and the second operating piece can rotate around the diameter on the end face of the second filter element mechanism to enable the second operating piece to be embedded into the concave part or protrude out of the end face of the second filter element mechanism.

9. The filter cartridge of claim 1, wherein an end of the first filter cartridge mechanism proximate the second end has a first threaded portion.

10. The filter cartridge of claim 1, wherein the first filter cartridge mechanism includes a first housing including an interior sidewall that forms the receiving cavity and a first filter element disposed in the first housing.

11. The filter cartridge of claim 10, wherein the first filter unit is a reverse osmosis membrane filter unit or a nanofiltration membrane filter unit.

12. The filter cartridge of claim 10, wherein the first housing further includes a spacer sleeve disposed within an inner sidewall, the spacer sleeve and the inner sidewall defining a first flow passage therebetween, the inner sidewall having a through-hole therein in communication with the first flow passage.

13. The filter cartridge of claim 12, wherein the nozzle unit comprises a first nozzle unit opening on the first housing; the first nozzle unit comprises a fifth port, a sixth port and a seventh port which are arranged on the first shell; the outer side wall of the first filtering unit is a wastewater outlet, the inner side wall of the first filtering unit is a purified water outlet, and the end part of the first filtering unit is a raw water inlet; the raw water inlet is communicated with the fifth port, the purified water outlet is communicated with the sixth port through the through hole and the first flow channel, and the waste water outlet is communicated with the seventh port.

14. The filter cartridge of claim 1, wherein the second filter cartridge mechanism includes a second housing, a housing disposed in the second housing, a center tube disposed in the housing, a pre-filter unit, and a post-filter unit, the housing and the second housing forming a second flow path therebetween; the front-mounted filter unit is sleeved outside the central tube, and one end of the central tube is communicated with the water outlet end of the rear-mounted filter unit; the front filtering unit and the rear filtering unit are arranged in a vertical direction.

15. The filter cartridge of claim 14, wherein the nozzle unit comprises a second nozzle unit opening on the second housing; the second nozzle unit comprises a first port, a second port and a fourth port which are arranged on the second shell, and the shell is provided with a third port;

16. The filter cartridge of claim 1, wherein the second filter cartridge mechanism comprises: the central pipe, the front filter unit and the rear filter unit are provided with a second shell; the front filtering unit is sleeved outside the central tube, the front filtering unit and the rear filtering unit are arranged in a vertical direction, and one end of the central tube is connected to the second shell to be communicated with the water outlet end of the rear filtering unit; an annular space is formed among the front filtering unit, the rear filtering unit and the inner side wall of the first filter element mechanism, and the annular space is divided into a first annular space and a second annular space which are independent; first filter core mechanism includes first casing and sets up first filter unit in the first casing, first casing includes the inside wall, the through-hole has been seted up on the inside wall, the through-hole with the second ring empty phase intercommunication.

17. The filter cartridge of claim 16, wherein the nozzle unit comprises a first nozzle unit and a second nozzle unit; the second nozzle unit comprises a first port and a second port, and the second housing has a third port thereon; the first water gap unit comprises a fifth port and a seventh port which are arranged on the first shell, the outer side wall of the first filtering unit is a wastewater outlet, the inner side wall of the first filtering unit is a purified water outlet, and the end part of the first filtering unit is a raw water inlet; the raw water inlet is communicated with the fifth port, and the waste water outlet is communicated with the seventh port;

18. The filter cartridge of claim 14 or 16, wherein the post-filter unit comprises: the microfiltration filter element and the active carbon, wherein the incoming water firstly passes through the active carbon and then passes through the microfiltration filter element.

19. The filter cartridge of claim 14 or 16, wherein the pre-filter mechanism has an inlet end and the post-filter mechanism has an outlet end;

20. The filter cartridge of claim 19, wherein the communication mechanism comprises a one-way valve having an inlet in communication with the outlet end and an outlet in communication with the inlet end.

21. The filter cartridge of claim 19, wherein when the second filter cartridge arrangement includes a second housing, a housing disposed in the second housing, a center tube disposed in the housing, a pre-filter element, and a post-filter element, the housing includes a first housing for receiving the pre-filter element and a second housing for receiving the post-filter element, an upper end of the second housing being sealingly connected to a lower end of the first housing; the side wall of the second shell is provided with a recess, the communication mechanism is arranged in the recess, and the second shell is provided with a through hole for communicating the recess with the water outlet end.

22. The filter cartridge of claim 21, wherein an annular space is provided between an outer sidewall of the pre-filter unit and the housing; the first shell is sleeved outside the second shell, a gap is formed between the side wall of the uppermost end of the second shell and the inner wall of the first shell, and the recess is communicated with the annular space through the gap;

23. A water purification device, characterized in that, water purification device includes: a main chassis having a cavity thereon; a filter cartridge according to any one of claims 1 to 22, which is disposable in the chamber by gripping the first handle portion to enable removal of the cartridge from the main housing.

24. The water purifying apparatus of claim 23, wherein the cartridge is switched between the locked state and the unlocked state by rotating the first operating part about an axis of the cartridge.

25. The water purification apparatus of claim 24, wherein the first cartridge mechanism has a first threaded portion at an end adjacent the second end, and the main housing has a second threaded portion matching the first threaded portion, the first threaded portion engaging or disengaging the second threaded portion when the first operating member is rotated to switch the cartridge and the main housing between the locked state and the unlocked state.

26. The water purification unit of claim 24, further comprising: a pressure boosting device; and when the filter element and the main machine shell are in a locked state, each interface in the interface unit is butted with the first water port unit of the first filter element mechanism and/or the second water port unit of the second filter element mechanism, so that the second port is communicated with the inlet of the pressurizing device, and the outlet of the pressurizing device is communicated with the fifth port.

27. The water purification apparatus of claim 26, wherein when the first nozzle unit includes a sixth port and the second nozzle unit includes a fourth port, the sixth port is in communication with the fourth port.