Filter element device and water purification equipment

Abstract

The utility model discloses a filter element device and water purification equipment, a first filter element is arranged in a first filter bottle, and a water pipe is arranged in the first filter bottle; a second filter element is arranged in the second filter bottle; the joint piece is configured to be detachably connected with the water pipe and the second filter bottle, so that the water channel where the second filter element is located is communicated with the water pipe. According to the scheme, different levels of filter elements can be independently replaced, and the element replacement cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technology field especially relates to a filter element device and water purification equipment. BACKGROUND

[0002] A kind of composite filter element device currently, two-stage or multistage filter element is arranged in filter bottle, each stage filter element is separated by partition, water hole is provided on partition, to form internal waterway.Due to the life of different levels filter element is different, usually according to the life of short one-stage filter element matching other stage filter element.When the filter element of short life expires or the filter element of certain level is blocked, the whole composite filter element device needs to be discarded, causing resource waste, and increasing the cost of replacing core.

[0003] The above information disclosed in the background is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0004] In view of the problems pointed out in the background, the utility model provides a filter element device and water purification equipment, different levels filter element can be replaced individually, to reduce the cost of replacing core.

[0005] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:

[0006] In some embodiments of the present application, a filter element device is provided, comprising:

[0007] The first filter bottle is internally provided with a first filter element, and a water pipe is arranged in the first filter bottle;

[0008] The second filter bottle is internally provided with a second filter element;

[0009] The joint piece is configured to detachably connect the water pipe and the second filter bottle, so as to communicate the water channel in which the second filter element is located with the water pipe.

[0010] In some embodiments of the present application, the joint piece is arranged on one of the first filter bottle and the second filter bottle, one end of the joint piece is connected with the water pipe, and the other end of the joint piece is connected with the other one of the first filter bottle and the second filter bottle;

[0011] In some embodiments of the present application, a first extension wall in the form of a ring is arranged on the first filter bottle, the first extension wall encloses a third mounting opening, a second extension wall in the form of a ring is arranged on the second filter bottle, the second extension wall encloses a fourth mounting opening, one end of the joint piece is connected with the third mounting opening, and the other end of the joint piece is connected with the fourth mounting opening, and a slot for inserting the first extension wall and the second extension wall is arranged on the joint piece, so as to fix the first filter bottle and the second filter bottle.

[0012] In some embodiments of the present application, the first filter bottle is provided with a mounting opening, the outer peripheral wall of the connector is provided with a first sealing ring, the connector is arranged in the mounting opening, and the first sealing ring is sealed with the inner peripheral wall of the mounting opening.

[0013] In some embodiments of the present application, the first filter bottle is provided with a first pipe barrel, and the water pipe is arranged in the space surrounded by the first pipe barrel.

[0014] In some embodiments of the present application, the first end of the connector is inserted into the first pipe barrel, the first end of the connector is provided with a first plug-in part, the water pipe is plugged into the first plug-in part, and the water pipe is communicated with the internal water channel of the connector.

[0015] In some embodiments of the present application, the outer peripheral wall of the first end of the connector is provided with a second sealing ring, and the second sealing ring is sealed with the inner peripheral wall of the first pipe barrel.

[0016] In some embodiments of the present application, the first filter core is arranged around the first pipe barrel.

[0017] In some embodiments of the present application, the second end of the connector is provided with a second plug-in part, the second filter bottle is provided with a third plug-in part, the second plug-in part is plugged into the third plug-in part, and the water channel in which the second filter core is arranged is communicated with the internal water channel of the connector.

[0018] In some embodiments of the present application, the second plug-in part is a plug with a male check structure, the third plug-in part is a socket with a female check structure, and the male check structure is connected with the female check structure.

[0019] In some embodiments of the present application, the first filter bottle is provided with a fourth plug-in part, the water pipe is plugged into the fourth plug-in part, and the fourth plug-in part is configured to be connected with an external water channel to communicate the water pipe with the external water channel.

[0020] In some embodiments of the present application, the water pipe is detachably arranged in the first filter bottle.

[0021] In some embodiments of the present application, the second filter core includes a second filter core I and a second filter core II.

[0022] The first filter bottle is provided with a plurality of water pipes, a part of the plurality of water pipes is communicated with the water channel in which the second filter core I is arranged through the connector, and another part of the plurality of water pipes is communicated with the water channel in which the second filter core II is arranged through the connector.

[0023] In some embodiments of the present application, a water purification device is provided, comprising the filter core device as described above.

[0024] Compared with the prior art, the water purification device has the advantages and positive effects that:

[0025] The filter core device is a composite filter core device, comprising a first filter bottle, a second filter bottle and a connector, a water pipe is arranged in the first filter bottle, the second filter bottle is connected with an external waterway through the water pipe, the connector is used to realize the butt joint connection between the second filter bottle and the water pipe, and the first filter bottle and the second filter bottle can be connected and fixed, so that the structure is compact; the first filter bottle and the second filter bottle can be separated by disconnecting the connector and the first filter bottle or the second filter bottle, the first filter bottle and the second filter bottle can be replaced independently, and the core replacement cost is reduced. The connector is a detachable structure, and the connector is not discarded when the filter bottle is replaced, so that the connector can be reused, and the core replacement cost is further reduced.

[0026] Other features and advantages of the present application will become more apparent after reading the detailed description of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is a structural view of the filter core device according to some embodiments;

[0029] Figure 2 It is a sectional view of the filter core device according to some embodiments;

[0030] Figure 3 It is a structural view of the first filter bottle according to some embodiments;

[0031] Figure 4 It is a sectional view of the first filter bottle according to some embodiments;

[0032] Figure 5 It is a structural view of the second filter bottle according to some embodiments;

[0033] Figure 6 It is a sectional view of the second filter bottle according to some embodiments;

[0034] Figure 7 It is a structural view of the connector according to some embodiments;

[0035] Figure 8 Yet another structure view of the joint according to some embodiments;

[0036] Figure 9 A sectional view of the joint according to some embodiments;

[0037] Figure 10 A sectional view of the water pipe according to some embodiments.

[0038] Reference signs:

[0039] 100, first filter bottle; 110, first filter core; 120, first tube; 130, first bottle body; 131, extension wall; 132, mounting port; 140, fourth plug-in part;

[0040] 200, second filter bottle; 210, second filter core; 220, third plug-in part; 230, second bottle body;

[0041] 300, joint; 310, first plug-in part; 320, second plug-in part;

[0042] 400, water pipe;

[0043] 510, first sealing ring; 520, second sealing ring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0047] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through other features between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0050] In some embodiments of the present application, a water purification device, such as a water purifier, is provided, which includes a filter core device. The filter core device filters raw water to provide purified water for users. Figure 1 A structural view of the filter core device, Figure 2 A sectional view of the filter core device.

[0051] The filter core device includes a first filter bottle 100. Figure 3 A structural view of the first filter bottle 100, Figure 4Figure 1 is a sectional view of the first filter bottle 100. The first filter bottle 100 comprises a first bottle body 130, which is in a cylindrical structure. The first filter bottle 100 further comprises a first filter element 110, which is arranged in the first bottle body 130. The first bottle body 130 is provided with a first water inlet and a first water outlet, which are in communication with the space in which the first filter element 110 is arranged. Water flows into the space in which the first filter element 110 is arranged through the first water inlet, is filtered by the first filter element 110, and then flows out through the first water outlet.

[0052] The filter element device further comprises a second filter bottle 200. Figure 5 Figure 2 is a structural view of the second filter bottle 200. Figure 6 Figure 3 is a sectional view of the second filter bottle 200. The second filter bottle 200 comprises a second bottle body 230, which is in a cylindrical structure. The second filter bottle 200 further comprises a second filter element 210, which is arranged in the second bottle body 230.

[0053] The filter element device further comprises a water pipe 400. Figure 10 Figure 4 is a structural view of the water pipe 400. The water pipe 400 is arranged in the first filter bottle 100, i.e. the water pipe 400 is arranged in the first bottle body 130. The water pipe 400 and the water channel space in which the first filter element 110 is arranged are separate and independent. In other words, two isolated installation cavities are formed in the first bottle body 130, one of which is used to install the first filter element 110, and the other of which is used to install the water pipe 400.

[0054] The filter element device further comprises a connector 300. Figure 7 Figure 5 is a structural view of the connector 300 viewed from one side. Figure 8 Figure 6 is a structural view of the connector 300 viewed from the other side. Figure 9 Figure 7 is a sectional view of the connector 300. The connector 300 is configured to detachably connect the water pipe 400 and the second filter bottle 200, so as to connect the water channel in which the second filter element 210 is arranged and the water pipe 400.

[0055] In other words, one end of the connector 300 is connected to the water pipe 400, and the other end of the connector 300 is connected to the second filter bottle 200, so as to connect the water channel in which the second filter element 210 is arranged and the water pipe 400 through the connector 300. The water pipe 400 comprises a water inlet pipe and a water outlet pipe. Water flows into the space in which the second filter element 210 is arranged through the water inlet pipe, is filtered by the second filter element 210, and then flows out through the water outlet pipe.

[0056] The connection between the first filter bottle 100 and the second filter bottle 200 is realized through the connector 300. In other words, the connector 300 not only serves as a water channel connection, but also serves as a connection and fixing between the first filter bottle 100 and the second filter bottle 200.

[0057] The second filter bottle 200 is connected with an external water channel through the water pipe 400 to realize water inflow and outflow of the second filter bottle 200. The first bottle body 130 is provided with a second water inlet and a second water outlet which are communicated with the water pipe 400. The second water inlet is communicated with the water inflow pipe, and the second water outlet is communicated with the water outflow pipe. Water flows into the space where the second filter element 210 is located through the second water inlet and the water inflow pipe, is filtered by the second filter element 210, and then flows out through the water outflow pipe and the second water outlet.

[0058] The filter element device of the present application is a composite filter element device which comprises a first filter bottle 100, a second filter bottle 200 and a joint member 300. The water pipe 400 is arranged in the first filter bottle 100 to connect the second filter bottle 200 with an external water channel. The joint member 300 is used to realize the butt joint communication between the second filter bottle 200 and the water pipe 400, and also to realize the connection and fixation between the first filter bottle 100 and the second filter bottle 200, so that the structure is compact. When the connection between the joint member 300 and the first filter bottle 100 or the second filter bottle 200 is released, the first filter bottle 100 and the second filter bottle 200 can be separated, the first filter bottle 100 and the second filter bottle 200 can be replaced individually, and the cost of replacing the filter element is reduced.

[0059] The joint member 300 is a detachable structure. When the filter bottle is replaced, the joint member 300 is not discarded and can be reused, further reducing the cost of replacing the filter element.

[0060] In some embodiments of the present application, the joint member 300 is arranged on one of the first filter bottle 100 and the second filter bottle 200. One end of the joint member 300 is connected with the water pipe 400, and the other end of the joint member 300 is connected with the other one of the first filter bottle 100 and the second filter bottle 200.

[0061] For example, the joint member 300 is arranged on the first filter bottle 100. One end of the joint member 300 is connected with the water pipe 400, and the other end of the joint member 300 is connected with the second filter bottle 200. Figure 3 The first filter bottle 100 shown in the figure is provided with the joint member 300, Figure 4 The first filter bottle 100 shown in the figure is not provided with the joint member 300.

[0062] In other words, the joint member 300 and the water pipe 400 are arranged in the first filter bottle 100. One end of the joint member 300 is connected with the water pipe 400. The first filter bottle 100 is provided with an opening through which the joint member 300 is exposed, so that the joint member 300 is connected with the second filter bottle 200.

[0063] The joint piece 300 and the water pipe 400 are arranged in the first filter bottle 100, and the second filter bottle 200 only needs to be provided with an interface for connecting with the joint piece 300, which is helpful for simplifying the design of the second filter bottle 200 and realizing the compact design of the joint piece 300 and the water pipe 400 in the first filter bottle 100.

[0064] For example, the joint piece 300 is arranged in the second filter bottle 200, and the water pipe 400 is arranged in the first filter bottle 100. An interface for connecting with the joint piece 300 is arranged on the first filter bottle 100, and the water pipe 400 is connected with the interface. When the joint piece 300 is connected with the interface on the first filter bottle 100, the water pipe 400 is connected with the space in which the second filter core 210 is arranged.

[0065] In some embodiments of the present application, the first filter bottle 100 is provided with a first annular extension wall, and the first extension wall surrounds a third mounting port. The second filter bottle 200 is provided with a second annular extension wall, and the second extension wall surrounds a fourth mounting port. One end of the joint piece 300 is connected with the third mounting port, and the other end is connected with the fourth mounting port. The joint piece 300 is provided with a slot for inserting the first extension wall and the second extension wall. The first filter bottle 100, the second filter bottle 200 and the joint piece 300 are fixedly connected through the insertion between the first extension wall and the slot on the joint piece 300 and the insertion between the second extension wall and the slot on the joint piece 300.

[0066] The joint piece 300 not only plays a role of water channeling, but also plays a role of connecting and fixing the first filter bottle 100 and the second filter bottle 200.

[0067] In some embodiments of the present application, referring to Figures 2 to 4 The first filter bottle 100 is provided with a mounting port 132 at one end side of the first filter bottle 100. The outer peripheral wall of the joint piece 300 is provided with a first sealing ring 510, and the joint piece 300 is arranged in the mounting port 132 to realize the fixed mounting of the joint piece 300 on the first filter bottle 100. The first sealing ring 510 is sealed with the inner peripheral wall of the mounting port 132 to realize the sealed connection and avoid water leakage.

[0068] Specifically, one end side of the first bottle body 130 is provided with an extension wall 131 extending outward, and the extension wall 131 surrounds the mounting port 132. The mounting port 132 for mounting the joint piece 300 is formed by the external extension wall 131, which is equivalent to that the main part of the joint piece 300 is located outside the main cavity of the first filter bottle 100 and does not occupy the mounting space of the first filter core 110.

[0069] In some embodiments of the present application, referring to Figure 2 and Figure 4The first filter bottle 100 is provided with a first tube 120, and the water pipe 400 is arranged in a space surrounded by the first tube 120.

[0070] Specifically, the first tube 120 extends along the height direction of the first filter bottle 100, and the inner cavity of the first filter bottle 100 is divided into two isolated installation cavities by the first tube 120, one of which is used for installing the first filter element 110, and the other is used for installing the water pipe 400.

[0071] The first filter element 110 is arranged around the first tube 120. The first tube 120 not only plays a role in separating the cavity, but also plays a role as an installation support for the first filter element 110.

[0072] In some embodiments of the present application, the inner cavity of the first tube 120 is in communication with the installation port 132, one end of the connector 300 is inserted into the first tube 120, and the top of the first tube 120 is positioned and fixed. The outer peripheral wall of the first end of the connector 300 is provided with a second sealing ring 520, and the second sealing ring 520 is sealed with the inner peripheral wall of the first tube 120 to achieve sealed connection.

[0073] The connector 300 is arranged at the end side of the first filter bottle 100, which is convenient for connecting with the second filter bottle 200. The first filter element 110 is sealed at the installation port 132 by the first sealing ring 510 and the second sealing ring 520, so as to avoid water leakage at this end.

[0074] The first water inlet and the first water outlet for communicating with the water channel of the first filter element 110 are provided with a check structure (not shown), which is opened only when the first filter bottle 100 is properly inserted into the waterway board, so as to realize waterway communication. When the first filter bottle 100 is detached from the external waterway for replacement, no water will flow out.

[0075] In some embodiments of the present application, the first end of the connector 300 is inserted into the first tube 120, and the first end of the connector 300 is provided with a first plug-in part 310. The water pipe 400 is plugged into the first plug-in part 310 to communicate the internal water channel of the connector 300 with the water pipe 400.

[0076] For example, the first plug-in part 310 is a socket, one end of the water pipe 400 is inserted into the socket, and a sealing ring is arranged at the plug-in position to realize sealed connection between the connector 300 and the water pipe 400.

[0077] The fourth plug-in part 140 is arranged on the first filter bottle 100, and the water pipe 400 is plugged into the fourth plug-in part 140. The fourth plug-in part 140 is configured to be connected with the external waterway to communicate the water pipe 400 with the external waterway.

[0078] For example, the fourth connecting part 140 is a socket, one end of the water pipe 400 is inserted into the socket, a sealing ring is arranged at the connecting position to realize the sealing and connecting of the water pipe 400 in the first filter bottle 100. An anti-return structure (not shown) is arranged in the fourth connecting part 140, and the anti-return structure is opened only when the first filter bottle 100 is connected to the water circuit board, so as to realize the water circuit connection, and no water will flow out when the first filter bottle 100 is separated from the external water circuit.

[0079] In some embodiments of the present application, the second end of the connector 300 is provided with a second connecting part 320, the second filter bottle 200 is provided with a third connecting part 220, and the second connecting part 320 is connected to the third connecting part 220 to connect the water channel in which the second filter core 210 is arranged to the internal water channel of the connector 300. In this way, one end of the connector 300 is connected to the water pipe 400, and the other end of the connector 300 is connected to the second filter bottle 200, so as to realize the connection of the second filter bottle 200 and the water pipe 400 through the connector 300.

[0080] In a specific embodiment, the second connecting part 320 is a plug, and a male anti-return structure is arranged in the plug, the third connecting part 220 is a socket, and a female anti-return structure is arranged in the socket. The male anti-return structure is connected to the female anti-return structure to realize the connection of the water channel in which the second filter core 210 is arranged to the water pipe 400. At the same time, no water will flow out when the connector 300 is separated from the second filter bottle 200.

[0081] In some embodiments of the present application, a slot (not shown) is arranged on the second bottle body 230, and the extension wall 131 is inserted into the slot to further improve the connection reliability between the first filter bottle 100 and the second filter bottle 200.

[0082] In some embodiments of the present application, the water pipe 400 is detachably arranged in the first filter bottle 100. When the first filter bottle is replaced, the water pipe 400 can be taken out of the first bottle body 130, and the water pipe 400 can be repeatedly used to further reduce the cost of replacing the filter core.

[0083] In some embodiments of the present application, referring to Figure 2 and Figure 6 , the second filter core 210 includes a second filter core 210Ⅰ and a second filter core 210Ⅱ. For example, the second filter core 210Ⅰ is used as a pre-filter core, and the second filter core 210Ⅱ is used as a post-filter core. Alternatively, the second filter core 210Ⅰ is used as a post-filter core, and the second filter core 210Ⅱ is used as a pre-filter core.

[0084] A plurality of water pipes 400 are arranged in the first filter bottle 100, a part of the plurality of water pipes 400 is connected to the water channel in which the second filter core 210Ⅰ is arranged through the connector 300, and another part of the plurality of water pipes 400 is connected to the water channel in which the second filter core 210Ⅱ is arranged through the connector 300.

[0085] In other words, the water inlet and outlet of the second filter element 210I and the second filter element 210II are realized through the water pipes 400. Four water pipes 400 are arranged in the first filter bottle 100, and four first plug-in parts 310 corresponding to the four water pipes 400 are arranged on the connector piece 300, wherein two water pipes 400 serve as the water inlet pipe and the water outlet pipe of the first filter element 110I, and the other two water pipes 400 serve as the water inlet pipe and the water outlet pipe of the second filter element 210II. Correspondingly, the second filter bottle 200 is provided with four third plug-in parts 220. Figure 7 In addition, four second plug-in parts 320 are arranged on the connector piece 300.

[0086] The present application does not make specific limitations on the water filtering sequence of the first filter element 110, the second filter element 210I and the second filter element 210II, which is determined according to actual use requirements.

[0087] For example, in some specific embodiments, one of the second filter element 210I and the second filter element 210II is a pre-filter element, and the other is a post-filter element, and the first filter element 110 is an RO membrane. Taking the second filter element 210I as the pre-filter element and the second filter element 210II as the post-filter element as an example, the water path is as follows: raw water enters the water channel where the second filter element 210I is located through the water inlet pipe connected with the second filter element 210I, and after being filtered by the second filter element 210I, first filtered water is obtained, which flows out through the water outlet pipe connected with the second filter element 210I; the first filtered water flows into the water channel where the first filter element 110 is located through the water path plate, and after being filtered, second filtered water is obtained; the second filtered water flows into the water channel where the second filter element 210II is located through the water inlet pipe connected with the second filter element 210II, and after being filtered by the second filter element 210II, third filtered water is obtained, which flows out through the water outlet pipe connected with the second filter element 210II.

[0088] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0089] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A filter cartridge arrangement, characterized by The utility model relates to a filter core device, including: A first filter bottle is internally provided with a first filter core, and a water pipe is arranged in the first filter bottle; A second filter bottle is internally provided with a second filter core; A connector is configured to detachably connect the water pipe and the second filter bottle to communicate a water channel where the second filter core is located with the water pipe.

2. The filter core device according to claim 1, wherein the connector is arranged on one of the first filter bottle and the second filter bottle, one end of the connector is connected with the water pipe, and the other end of the connector is connected with the other one of the first filter bottle and the second filter bottle; or, a first extension wall in the shape of a ring is arranged on the first filter bottle, the first extension wall encloses a third mounting opening, a second extension wall in the shape of a ring is arranged on the second filter bottle, the second extension wall encloses a fourth mounting opening, one end of the connector is connected with the third mounting opening, the other end of the connector is connected with the fourth mounting opening, and a slot for inserting the first extension wall and the second extension wall is arranged on the connector to fix the first filter bottle and the second filter bottle.

3. The filter core device according to claim 2, wherein a mounting opening is arranged on the first filter bottle, a first sealing ring is arranged on the outer peripheral wall of the connector, the connector is arranged in the mounting opening, and the first sealing ring is sealed with the inner peripheral wall of the mounting opening.

4. The filter core device according to claim 1, wherein a first tube is arranged in the first filter bottle, the water pipe is arranged in the space enclosed by the first tube, and the first filter core is arranged around the first tube.

5. The filter core device according to claim 4, wherein the first end of the connector is inserted into the first tube, the first end of the connector is provided with a first plug-in part, the water pipe is plugged into the first plug-in part to communicate the water pipe with the internal water channel of the connector.

6. The filter core device according to claim 5, wherein a second sealing ring is arranged on the outer peripheral wall of the first end of the connector, and the second sealing ring is sealed with the inner peripheral wall of the first tube.

7. The filter core device according to claim 1, wherein the second end of the connector is provided with a second plug-in part, a third plug-in part is arranged on the second filter bottle, the second plug-in part is plugged into the third plug-in part to communicate the water channel where the second filter core is located with the internal water channel of the connector; the second plug-in part is a plug-in head with a male reverse stop structure arranged therein, the third plug-in part is a plug-in socket with a female reverse stop structure arranged therein, and the male reverse stop structure is connected with the female reverse stop structure.

8. The filter core device according to any one of claims 1 to 7, wherein the water pipe is detachably arranged in the first filter bottle.

9. The filter core device according to any one of claims 1 to 7, wherein the second filter core includes a second filter core I and a second filter core II. The first filter bottle is provided with a plurality of water pipes, and a part of the plurality of water pipes is communicated with the water channel where the second filter core I is located through the joint, and another part of the plurality of water pipes is communicated with the water channel where the second filter core II is located through the joint.

10. A water purification apparatus characterized by comprising: The filter core device as claimed in any one of claims 1 to 9 is included.

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