Filtering device and water heater

Abstract

The utility model relates to the technical field of water heaters, in particular to a purifying and filtering device and a water heater. The purifying and filtering device comprises a filter shell, a filter element and a filter element, the filter cover is detachably connected with the filter shell; the filter assembly is detachably arranged in the filter cavity, the filter assembly comprises a filter material support and a filter material sealing cover, and the filter material support is detachably connected with the filter material sealing cover. According to the purifying and filtering device provided by the utility model, the filtering cover and the filtering shell are configured to be detachably connected, and the filtering material bracket and the filtering material sealing cover in the filtering assembly are configured to be detachably connected, so that the filtering assembly can be conveniently taken out for cleaning, and the filtering material is conveniently replaced. According to the purifying and filtering device and the water heater provided by the utility model, the defects that the interior of a filter shell of an existing purifying and filtering device is difficult to clean, and a filter material in a filter element is difficult to replace are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a filter device and a water heater. Background Art

[0002] A filter is a device used to filter impurities and pollutants in water. It is usually composed of a filter element and a filter housing. The filter element can remove particles, sand, rust, dirt, bacteria, odor, etc. in the water to ensure that the water is clean and pure. The filter can improve the efficiency of the water heater and extend its service life, while also helping to protect the health of users.

[0003] During long-term use of the filter, the filter element and the filter housing of the water purifier are in a humid environment for a long time, which is easy to breed bacteria. It is difficult to clean the filter housing or the components arranged in the filter housing, and it is difficult to replace the filter material in the filter element. Utility Model Content

[0004] The utility model provides a filter cleaning device and a water heater, which are used to solve the defects of the existing filter cleaning device that it is difficult to clean the filter housing or the parts arranged in the filter housing, and it is difficult to replace the filter material in the filter element.

[0005] The utility model provides a filter cleaning device, comprising:

[0006] A filter housing, wherein a filter cavity is formed in the filter housing;

[0007] A filter cover, the filter cover is detachably connected to the filter housing;

[0008] A filter assembly is detachably arranged in the filter cavity, and the filter assembly comprises a filter material support and a filter material cover, and the filter material support is detachably connected to the filter material cover.

[0009] According to the filter cleaning device provided by the utility model, the filter cover is connected with the filter shell by snapping.

[0010] According to the filter cleaning device provided by the utility model, the outer wall of the filter shell is provided with a first buckle, and the inner wall of the filter cover is provided with a second buckle. In the tightened state, the first buckle and the second buckle abut against each other, and the second buckle is located on the inner side of the first buckle.

[0011] According to the filter purification device provided by the utility model, the filter material sealing cover is connected to the filter material bracket by snapping or threading.

[0012] According to the filter cleaning device provided by the utility model, one end of the filter assembly is detachably connected to the filter cover.

[0013] According to the filter cleaning device provided by the utility model, one end of the filter assembly is snap-connected with the filter cover.

[0014] The filter cleaning device provided by the utility model further comprises a filter element joint assembly, and the filter element joint assembly is detachably connected to the filter housing.

[0015] According to the filter cleaning device provided by the utility model, the filter element joint assembly is threadedly connected to the filter housing.

[0016] According to the filter cleaning device provided by the utility model, the filter element joint assembly includes a main body, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are both arranged on the main body, the inner cavity of the main body is communicated with the filter cavity, and the water outlet pipe is communicated with the inner cavity of the main body;

[0017] The water outlet pipe is rotatably matched with the main body to adjust the direction of the water outlet pipe.

[0018] Another aspect of the utility model provides a water heater, comprising the filter purification device as described in any one of the above items.

[0019] The filter cleaning device provided by the utility model can be easily taken out for cleaning and filter material replacement by configuring the filter cover and the filter shell to be detachably connected, and configuring the filter material support and the filter material sealing cover in the filter assembly to be detachably connected. The filter cleaning device and water heater provided by the utility model solve the defects of the existing filter cleaning device that it is difficult to clean the filter shell and replace the filter material in the filter element.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of a filter cleaning device provided in an embodiment of the utility model;

[0023] Figure 2 It is an exploded schematic diagram of a filter cleaning device provided in an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of one of the use states of the filtration device provided in the embodiment of the utility model;

[0025] Figure 4 It is a cross-sectional view of one of the use states of the filtration device provided by the embodiment of the utility model;

[0026] Figure 5 This is a schematic diagram of the second use state of the filtration device provided by the embodiment of the utility model;

[0027] Figure 6 It is a cross-sectional view of the second use state of the filtration device provided by the embodiment of the utility model.

[0028] Reference numerals:

[0029] 10. filter housing; 110. first screw button;

[0030] 20. filter cover; 210. second rotary buckle; 220. card slot;

[0031] 30, filter assembly; 310, filter material support; 311, clamping table; 320, filter material cover; 321, elastic buckle; 330, third rotary buckle;

[0032] 40. filter element joint assembly; 410. main body; 420. water inlet pipe; 430. water outlet pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] Combine the following Figures 1 to 6 The utility model describes a filter purification device and a water heater.

[0039] See also Figure 1 , Figure 2 and Figure 4 As shown, the filter device provided by the embodiment of the utility model includes a filter housing 10, a filter cover 20 and a filter assembly 30. A filter cavity is formed in the filter housing 10; the filter cover 20 is detachably connected to the filter housing 10; the filter assembly 30 is detachably arranged in the filter cavity, and the filter assembly 30 includes a filter material support 310 and a filter material sealing cover 320, and the filter material support 310 and the filter material sealing cover 320 are detachably connected.

[0040] The filter cleaning device provided by the utility model can facilitate the removal of the filter assembly 30 for cleaning and replacement of the filter material by configuring the filter cover 20 and the filter housing 10 to be detachably connected, and configuring the filter material support 310 and the filter material sealing cover 320 in the filter assembly 30 to be detachably connected. The filter cleaning device and water heater provided by the utility model solve the defects that the existing filter cleaning device is difficult to clean the filter housing 10 and difficult to replace the filter material in the filter element.

[0041] Specifically, see Figure 4 and Figure 6 As shown, in this embodiment, a water inlet channel is formed between the inner wall of the filter housing 10 and the filter assembly 30, and the tap water can enter the filter assembly 30 through the water inlet channel for filtration. The filter assembly 30 also includes a filter screen and filter material. The filter screen is arranged on the filter screen support and forms a filter material cavity for accommodating the filter material. The filter material is arranged in the filter material cavity. The cover is provided with a water outlet for the filtered clean water to flow out. The filter screen can be used to connect the water inlet channel with the filter material cavity and perform preliminary filtration on the tap water. After the tap water enters the filter assembly 30 through the water inlet channel, it is purified under the action of the filter material arranged in the filter material cavity, and then discharged to a set position (such as the water heater inlet pipe 420) through the water outlet arranged on the cover.

[0042] The filter material can be activated carbon, fiber filter material, ultrafiltration membrane, ion exchange resin or quartz sand, etc. You can choose one type according to your needs, or you can choose a combination of multiple types to achieve better filtering effect.

[0043] After the filter cleaning device has been used for a certain period of time, the filter cover 20 can be removed through the detachable connection structure between the filter cover 20 and the filter housing 10, and the filter assembly 30 can be taken out from the filter housing 10 to clean the surface (such as the filter screen) of the filter assembly 30. If the filter material needs to be replaced, the filter material cover 320 can be removed through the detachable connection structure between the filter material support 310 and the filter material cover 320, the used filter material can be taken out from the filter material cavity, and new filter material can be added to the filter material cavity.

[0044] The filter cover 20 and the filter housing 10 can be configured to be detachably connected by means of threaded connection, bayonet connection, latch connection, spring clamp connection or spiral connection. For example, when a threaded connection is adopted, the filter cover 20 and the filter housing 10 are fixed together by a threaded structure, which is convenient for tightening and disassembly; when a bayonet connection is adopted, a special bayonet can be designed on the edge of the filter cover 20 and the filter housing 10, so that the filter cover 20 can be easily inserted into the filter housing 10 and fixed together, which is convenient for disassembly; when a latch connection is adopted, a latch hole and a latch can be designed in the structure of the filter cover 20 and the filter housing 10, and the filter cover 20 and the filter housing 10 can be connected and disassembled by fixing and releasing the latch; when a spring clamp connection is adopted, the filter cover 20 and the filter housing 10 can be tightly fixed together by using a spring clamp mechanism, and the connection can be released by pressing the spring when disassembling; when a spiral connection is adopted, it is similar to a threaded connection, but a spiral structure is used to connect the filter cover 20 and the filter housing 10, which is convenient for tightening and disassembly.

[0045] The filter material support 310 and the filter material cover 320 may also be detachably connected by threaded connection, bayonet connection, latch connection, spring clamp connection or spiral connection. For example, when a threaded connection is adopted, the filter material support 310 and the filter material cover 320 are fixed together by a threaded structure, which is convenient for tightening and disassembly; when a bayonet connection is adopted, a special bayonet can be designed on the edges of the filter material support 310 and the filter material cover 320, so that the filter material cover 320 can be easily inserted into the filter material support 310 and fixed together, which is convenient for disassembly; when a latch connection is adopted, a latch hole and a latch can be designed in the structure of the filter material support 310 and the filter material cover 320, and the filter material cover 320 can be connected and disassembled by fixing and releasing the latch; when a spring clamping connection is adopted, the spring clamping mechanism can be used to tightly fix the filter material support 310 and the filter material cover 320 together, and the spring is pressed to release the connection during disassembly; when a spiral connection is adopted, it is similar to a threaded connection, but a spiral structure is used to connect the filter material support 310 and the filter material cover 320, which is convenient for tightening and disassembly.

[0046] It should be noted that when different detachable connection structures are selected, corresponding sealing structures need to be provided to seal between the filter cover 20 and the filter housing 10 or between the filter material support 310 and the filter material sealing cover 320. For example, when the filter cover 20 and the filter housing 10 are connected by a snap connection, a single or multiple sealing rings can be provided between the filter cover 20 and the filter housing 10 to achieve sealing; when the filter cover 20 and the filter housing 10 are connected by a threaded connection, a sealing gasket can be provided in the filter cover 20, and when the filter cover 20 is tightened, the end of the filter housing 10 abuts against the sealing gasket to achieve sealing.

[0047] According to some embodiments of the present invention, the filter cover 20 is connected to the filter housing 10 by snapping. By snapping the filter cover 20 to the filter housing 10, the user can easily disassemble the filter cover 20, thereby facilitating the removal of the filter assembly 30 for cleaning or maintenance. In addition, the snap connection method usually does not require additional disassembly tools, and the installation can be completed by simply pressing or rotating, saving installation time and labor costs.

[0048] For example, in some embodiments, a groove can be designed on the edge of the filter housing 10, and a corresponding protrusion can be designed on the filter cover 20. During installation, a certain force is applied to the filter cover 20 to embed the protrusion into the groove to complete the connection. During disassembly, a certain force is applied to the filter cover 20 to make the protrusion on the filter cover 20 fall out of the groove on the filter housing 10.

[0049] See also Figure 2 As shown, according to some embodiments of the present invention, the outer wall of the filter housing 10 is provided with a first knob 110, and the inner wall of the filter cover 20 is provided with a second knob 210. In the tightened state, the first knob 110 and the second knob 210 abut against each other, and the second knob 210 is located on the inner side of the first knob 110. By respectively providing the first knob 110 and the second knob 210 on the outer wall of the filter housing 10 and the inner wall of the filter cover 20, it is convenient for the user to disassemble and assemble the filter cover 20. Compared with threaded connection and other methods, the knob design can be more convenient for disassembly and assembly while ensuring the stability of the connection (reducing the number of turns of the filter cover 20 or the filter housing 10 by the user).

[0050] Specifically, in this embodiment, two first knobs 110 are provided along the circumferential direction on the outer wall of the filter housing 10, and correspondingly, two second knobs 210 are provided along the circumferential direction on the inner wall of the filter cover 20, and the first knobs 110 and the second knobs 210 correspond to each other one by one, which can improve the connection stability between the filter cover 20 and the filter housing 10. In addition, the first knob 110 and the second knob 210 are both provided with guide surfaces for guiding when the filter cover 20 is screwed in, which facilitates guiding when the filter cover 20 is screwed in, and reduces the difficulty of installation.

[0051] According to some embodiments of the utility model, the filter material cover 320 is connected with the filter material support 310 by snapping. By snapping the filter material cover 320 with the filter material support 310, the user can easily disassemble and assemble the filter material cover 320, thereby facilitating the removal of the filter material from the filter material cavity for replacement. In addition, the snap connection method usually does not require additional disassembly and assembly tools, and only requires a simple press or rotation to complete the installation, saving installation time and labor costs.

[0052] Specifically, see Figure 4 and Figure 6As shown, in this embodiment, one end of the filter material cover 320 is provided with an elastic buckle 321, and the filter material bracket 310 is provided with a clamping platform 311 that is clamped with the elastic buckle 321. The elastic buckle 321 is provided with an installation guide surface for easy installation and a disassembly guide surface for easy disassembly. When installing, the filter material cover 320 is pushed or pressed, and the elastic buckle 321 is clamped with the clamping platform 311 under the action of the installation guide surface; when disassembling, the filter material cover 320 is pulled, and the elastic buckle 321 is separated from the clamping platform 311 under the action of the disassembly guide surface.

[0053] According to some embodiments of the utility model, one end of the filter assembly 30 is detachably connected to the filter cover 20. By configuring one end of the filter assembly 30 and the filter cover 20 to be detachably connected, the filter assembly 30 can be taken out simultaneously when the filter cover 20 is removed, further improving the convenience of the device. At the same time, fixing one end of the filter assembly 30 by the end cap can also improve the stability of the filter assembly 30 during operation.

[0054] Similarly, one end of the filter assembly 30 and the filter cover 20 may be configured as a detachable connection by means of a threaded connection, a bayonet connection, a latch connection, a spring clamp connection or a spiral connection, which will not be described in detail here.

[0055] According to some embodiments of the present invention, one end of the filter assembly 30 is snap-connected with the filter cover 20. By configuring one end of the filter assembly 30 and the filter cover 20 to be snap-connected, after the filter cover 20 and the filter assembly 30 are taken out, the filter assembly 30 can be quickly detached from the filter cover 20, which is convenient for the user to operate.

[0056] Specifically, see Figure 2 As shown, in this embodiment, a third knob 330 is provided at one end of the filter assembly 30, and a slot 220 that is snap-fitted with the third knob 330 is provided on the inner bottom wall of the filter cover 20. A limiting portion for limiting the third knob 330 is provided on one side of the slot 220. After the third knob 330 is snap-fitted with the slot 220, the filter cover 20 can fix one end of the filter assembly 30, and the filter assembly 30 can also be taken out when the filter cover 20 is removed.

[0057] See also Figure 1 and Figure 2As shown, according to some embodiments of the utility model, the filter cleaning device also includes a filter element joint assembly 40, and the filter element joint assembly 40 is detachably connected to the filter housing 10. It should be noted that the filter element joint assembly 40 is provided with a plurality of joints for connecting to parts such as tap water pipes and water heaters. By configuring the filter element joint assembly 40 and the filter housing 10 to be detachably connected, the filter element joint assembly 40 and the filter housing 10 are conveniently disassembled, and the filter assembly 30 is conveniently taken out from the side of the filter housing 10 where the filter element joint assembly 40 is located for cleaning and maintenance. It is also convenient to clean and maintain the inside of the filter element joint assembly 40 and the connection position between the filter element joint assembly 40 and the filter housing 10, so as to keep the system in a good operating state.

[0058] Similarly, the filter element joint assembly 40 and the filter housing 10 may also be configured as a detachable connection by using a threaded connection, a bayonet connection, a latch connection, a spring clamp connection or a spiral connection, which will not be described in detail here.

[0059] See also Figure 4 and Figure 6 As shown, according to some embodiments of the present invention, the filter element joint assembly 40 is threadedly connected to the filter housing 10. By threading the filter element joint assembly 40 to the filter housing 10, it is easy to disassemble and assemble the filter element joint assembly 40, and the threaded connection can also provide good mechanical fixation, which can ensure that the connection between the filter element joint assembly 40 and the filter housing 10 is firm and reliable, and is not easy to loosen or fall off.

[0060] According to some embodiments of the present invention, when the filter element joint assembly 40 is threadedly connected to the filter housing 10, a sealing tape may be wound between the threads of the two to achieve a sealing effect.

[0061] See also Figure 3 and Figure 5 As shown, according to some embodiments of the utility model, the filter element joint assembly 40 includes a main body 410, a water inlet pipe 420 and a water outlet pipe 430, the water inlet pipe 420 and the water outlet pipe 430 are both arranged on the main body 410, the inner cavity of the main body 410 is communicated with the filter cavity, and the water outlet pipe 430 is communicated with the inner cavity of the main body 410; the water outlet pipe 430 and the main body 410 are rotatably matched to form a flexible joint to adjust the direction of the water outlet pipe 430. By rotatably matching the water outlet pipe 430 with the main body 410, the direction of the water outlet pipe 430 can be adjusted, so that the filtration device can be installed to match the water inlet direction of the user's home at will, thereby improving the flexibility of the device.

[0062] It should be noted that after the tap water enters the water inlet channel through the water inlet pipe 420, it enters the filter assembly 30 through the water inlet channel, is purified under the action of the filter material arranged in the filter material cavity, and is subsequently discharged into the inner cavity of the main body 410 of the filter element joint assembly 40 through the water outlet arranged on the cover, and is finally discharged into the water heater through the water outlet pipe 430.

[0063] For example, see Figures 3 to 6 As shown, by rotating the water outlet pipe 430, the angle between it and the water inlet pipe 420 can be adjusted to 180° or 90°. Of course, it can also be adjusted to any other angle as needed.

[0064] See below Figures 1 to 6 The filter purification device provided by the utility model is described with a specific example.

[0065] The filter cleaning device provided by the utility model includes a filter housing 10, a filter cover 20, a filter assembly 30 and a filter element joint assembly 40. A filter cavity is formed in the filter housing 10; the filter cover 20 is snap-connected with one end of the filter housing 10 through a first rotary buckle 110 and a second rotary buckle 210, and the filter element joint assembly 40 is threadedly connected with the other end of the filter housing 10; the filter assembly 30 is arranged in the filter cavity, and the filter assembly 30 includes a filter material support 310 and a filter material sealing cover 320, and the filter material support 310 and the filter material sealing cover 320 are snap-fitted with an elastic snap buckle 321 and a clamping platform 311. The filter assembly 30 is snap-fitted with the filter cover 20 through a third rotary buckle 330 and a clamping groove 220.

[0066] By setting as above, it is convenient to remove the filter cover 20 and the filter element joint assembly 40, and to take out the filter assembly 30 from the filter chamber for cleaning and maintenance, and to remove the filter material cover 320 from the filter material support 310 to replace the filter material. In the process of disassembly and assembly, no additional disassembly and assembly tools are required, and the whole device can be disassembled and assembled by simply pressing or rotating. In addition, by configuring one end of the filter assembly 30 and the filter cover 20 as a snap-on connection, the filter assembly 30 can be taken out simultaneously when the filter cover 20 is removed, which further improves the convenience of the device. By fixing one end of the filter assembly 30 by the end cap, the stability of the filter assembly 30 during operation can also be improved.

[0067] The filter element joint assembly 40 includes a main body 410, a water inlet pipe 420 and a water outlet pipe 430. The water inlet pipe 420 and the water outlet pipe 430 are both arranged on the main body 410. The inner cavity of the main body 410 is connected to the filter cavity, and the water outlet pipe 430 is connected to the inner cavity of the main body 410. The water outlet pipe 430 and the main body 410 are rotatably matched to form a flexible joint to adjust the direction of the water outlet pipe 430. By rotating the water outlet pipe 430 and the main body 410, the direction of the water outlet pipe 430 can be adjusted (for example, adjusted to Figure 3 or Figure 5 The direction shown in the figure) makes it easy for the filtration device to be installed in any way that matches the water inlet direction of the user's home, thereby improving the flexibility of the device.

[0068] The water heater provided in the embodiment of the utility model comprises the filter purification device as described in any one of the above embodiments.

[0069] The water heater provided by the utility model adopts the above-mentioned filter cleaning device, so it is also convenient to take out the filter assembly 30 for cleaning and to replace the filter material.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A filter device, characterized in that: include: A filter housing, wherein a filter cavity is formed in the filter housing; A filter cover, the filter cover is detachably connected to the filter housing; A filter assembly is detachably arranged in the filter cavity, and the filter assembly comprises a filter material support and a filter material cover, and the filter material support is detachably connected to the filter material cover.

2. The filter cleaning device according to claim 1, characterized in that: The filter cover is connected to the filter housing by snap-fitting.

3. The filter cleaning device according to claim 2, characterized in that: The outer wall of the filter housing is provided with a first buckle, and the inner wall of the filter cover is provided with a second buckle. In a tightened state, the first buckle and the second buckle abut against each other, and the second buckle is located on the inner side of the first buckle.

4. The filtration device according to claim 1, characterized in that: The filter material sealing cover is connected to the filter material support by snapping or threading.

5. The filtration device according to claim 1, characterized in that: One end of the filter assembly is detachably connected to the filter cover.

6. The filter cleaning device according to claim 5, characterized in that: One end of the filter assembly is snap-connected to the filter cover.

7. The filtration device according to any one of claims 1 to 6, characterized in that: It also includes a filter element joint assembly, which is detachably connected to the filter housing.

8. The filtration device according to claim 7, characterized in that: The filter element joint assembly is threadedly connected to the filter housing.

9. The filtration device according to claim 7, characterized in that: The filter element joint assembly comprises a main body, a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are both arranged on the main body, the inner cavity of the main body is communicated with the filter cavity, and the water outlet pipe is communicated with the inner cavity of the main body; The water outlet pipe is rotatably matched with the main body to adjust the direction of the water outlet pipe.

10. A water heater, characterized in that: It comprises a filter cleaning device as described in any one of claims 1 to 9.

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