Electric water heater

Abstract

The present application belongs to the technical field of household appliances, and particularly relates to an electric water heater. The present application aims to solve the problem of poor water quality of water discharged from the water outlet pipe of the electric water heater. The electric water heater of the present application comprises a heating device and a filtering device. The heating device comprises an inner container, and the inner container is provided with a first water inlet pipe. The filtering device comprises a shell and a filtering structure arranged in the shell. The shell is provided with a second water inlet pipe and a second water outlet pipe. The second water inlet pipe is used for connecting a tap water pipe, and the second water outlet pipe is communicated with the first water inlet pipe. The filtering structure is arranged between the second water inlet pipe and the second water outlet pipe. Through the above arrangement, the filtering device filters the solid impurities in the tap water. The water after filtering the solid impurities is injected into the inner container from the first water inlet pipe, thereby improving the water quality in the inner container, and further improving the water quality of the hot water discharged from the first water outlet pipe, and improving the user experience.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to an electric water heater. BACKGROUND

[0002] As a common appliance in daily life, the electric water heater can heat cold water into hot water of suitable temperature for users.

[0003] In the related art, the electric water heater comprises a shell and an inner container arranged in the shell. The inner container is internally provided with a heating pipe. The bottom of the inner container is provided with a water inlet pipe and a water outlet pipe. The bottom end of the water inlet pipe and the water outlet pipe extends to the outside of the shell. A tap water pipe is communicated with the water inlet pipe. The tap water pipe injects water into the inner container through the water inlet pipe. The heating pipe heats the water in the inner container. The heated water is discharged from the water outlet pipe for users to use.

[0004] However, since the tap water usually carries silt, floating objects and rust falling off the inner wall of the tap water pipe, the water quality of the water discharged from the water outlet pipe is poor, which reduces the user experience. SUMMARY

[0005] In order to solve the above problems in the related art, that is, to solve the problem of poor water quality of the water discharged from the water outlet pipe of the electric water heater, the present application provides an electric water heater, comprising: a heating device and a filtering device, the heating device comprising an inner container, the inner container being provided with a first water inlet pipe; the filtering device comprising a shell and a filtering structure, the shell being provided with a second water inlet pipe and a second water outlet pipe, the second water inlet pipe being used for connecting a tap water pipe, the second water outlet pipe being communicated with the first water inlet pipe; the filtering structure being arranged in the shell, and the filtering structure being located between the second water inlet pipe and the second water outlet pipe.

[0006] In the preferred technical scheme of the above electric water heater, the filtering structure divides the inner part of the shell into a first space and a second space. The second water outlet pipe is communicated with the first space. The second water inlet pipe is communicated with the second space.

[0007] In the preferred technical scheme of the above electric water heater, the filtering structure comprises a filter cartridge. The filter cartridge is provided with mesh on the cartridge wall. The filter cartridge is provided with an opening. The shell comprises a first side wall. The first side wall blocks the opening. The first side wall and the filter cartridge enclose the first space. The second water outlet pipe is connected to the first side wall.

[0008] In the electric water heater, the filter cylinder comprises a filter screen and a water baffle, the filter screen is tubular, the filter screen is provided with mesh, the water baffle is connected to one end of the filter screen away from the first side wall, and a preset gap is formed between the outer side of the filter screen and the inner wall of the shell.

[0009] In the electric water heater, the shell further comprises a second side wall and a third side wall, the second side wall is tubular, the center line of the second side wall is parallel to the horizontal plane, one end of the second side wall in the extending direction is connected to the first side wall, the other end of the second side wall in the extending direction is connected to the third side wall, the first side wall, the second side wall and the third side wall enclose a closed space, the second water inlet pipe is connected to the second side wall, and the projection of the filter screen on the second side wall is located outside the second water outlet pipe.

[0010] In the electric water heater, the second water inlet pipe is connected to one end of the second side wall close to the third side wall.

[0011] In the electric water heater, the bottom end of the shell is connected with a drain pipe, and the drain pipe is provided with a drain valve.

[0012] In the electric water heater, the shell further comprises an outer shell, the inner container and the filter device are arranged in the outer shell, the bottom of the outer shell is provided with a drain opening, the drain opening is located below the drain valve, a drain cover is arranged on the drain opening, and the drain cover is used for plugging the drain opening.

[0013] In the electric water heater, the shell further comprises an outer shell, the inner container and the filter device are arranged in the outer shell, the bottom of the outer shell is provided with a drain opening, the drain opening is located below the drain valve, a drain cover is arranged on the drain opening, and the drain cover is used for plugging the drain opening.

[0014] In the electric water heater, the shell further comprises an outer shell, the inner container and the filter device are arranged in the outer shell, the bottom of the outer shell is provided with a drain opening, the drain opening is located below the drain valve, a drain cover is arranged on the drain opening, and the drain cover is used for plugging the drain opening.

[0015] The skilled in the art can understand that the electric water heater of the present application comprises a heating device and a filtering device, the heating device comprises an inner container, and the inner container is provided with a first water inlet pipe; the filtering device comprises a shell and a filtering structure arranged in the shell, the shell is provided with a second water inlet pipe and a second water outlet pipe, the second water inlet pipe is used for connecting a tap water pipe, the second water outlet pipe is communicated with the first water inlet pipe, and the filtering structure is arranged between the second water inlet pipe and the second water outlet pipe. Through the above arrangement, the filtering device filters the solid impurities in the tap water, and the water filtered of the solid impurities is injected into the inner container from the first water inlet pipe, so that the water quality in the inner container is improved, and then the water quality of the hot water discharged from the first water outlet pipe is improved, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The preferred embodiments of the electric water heater of the present application will be described below with reference to the accompanying drawings. The drawings are as follows:

[0017] Figure 1 is a structural schematic diagram of the electric water heater of the present application Figure 1 ;

[0018] Figure 2 is a structural schematic diagram of the electric water heater of the present application after the shell is disassembled

[0019] Figure 3 is a structural schematic diagram of the electric water heater of the present application Figure 2 ;

[0020] Figure 4 is a structural schematic diagram of the filtering device in the electric water heater of the present application Figure 1 ;

[0021] Figure 5 is a structural schematic diagram of the filtering device in the electric water heater of the present application Figure 2 .

[0022] In the drawings:

[0023] 100, shell; 200, heating device;

[0024] 300, filtering device; 101, cylinder body;

[0025] 102, first end cover; 103, second end cover;

[0026] 104, baffle; 105, maintenance cover;

[0027] 106, total water inlet pipe; 107, blowdown cover;

[0028] 210, inner container; 211, first water inlet pipe;

[0029] 212, first water outlet pipe; 213, heating pipe;

[0030] 214, magnesium rod; 215, connecting pipe;

[0031] 310, shell; 311, second water inlet pipe;

[0032] 312, second water outlet pipe; 313, first side wall;

[0033] 314, second side wall; 315, third side wall;

[0034] 316, third space; 317, blowdown pipe;

[0035] 318, blowdown valve; 320, filtering structure;

[0036] 321, filter screen; 322, water baffle;

[0037] 323, first space. DETAILED DESCRIPTION

[0038] First, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0039] Secondly, it should be noted that in the description of the present application, the terms indicating the direction or position relationship of "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two components. 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.

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 skilled in the art without creative labor are within the scope of protection of the present application.

[0042] The electric water heater generally comprises a shell and an inner container arranged in the shell, an inner part of the inner container is provided with a heating pipe, a bottom of the inner container is provided with a water inlet pipe and a water outlet pipe, top ends of the water inlet pipe and the water outlet pipe are connected with the inner container, and bottom ends of the water inlet pipe and the water outlet pipe extend out of the shell. A tap water pipe is communicated with the water inlet pipe, the tap water pipe injects water into the inner container through the water inlet pipe, the heating pipe heats the water in the inner container, and the heated water is discharged from the water outlet pipe for use by a user.

[0043] After the silt in the tap water enters the inner container, the silt is deposited at the bottom of the inner container, and as the amount of silt accumulation increases, the maximum water capacity in the inner container will gradually decrease, resulting in a decrease in the available hot water capacity of the user.

[0044] The silt, floating matter carried in the tap water and the rust falling off the inner wall of the tap water pipe and other solid impurities entering the inner container will cause the water quality of the water discharged from the water outlet pipe to decrease, thereby reducing the user experience.

[0045] In addition, the floating matter in the tap water produces an odor after being heated in the inner container, the chlorine gas in the tap water and the rust falling off the inner wall of the tap water pipe also cause the tap water to have an odor, so that the hot water discharged from the water outlet pipe has an odor, thereby reducing the user experience.

[0046] The electric water heater provided by the embodiment filters the solid impurities in the tap water through the filtering device, the filtered water is injected into the inner container from the first water inlet pipe, the water quality in the inner container is improved, and then the water quality of the hot water discharged from the first water outlet pipe is improved, thereby improving the user experience.

[0047] The principles and characteristics of the embodiments of the present application are described below in conjunction with the drawings, and the examples are only used to explain the embodiments of the present application and are not used to limit the scope of the embodiments of the present application.

[0048] As shown in Figures 1-3 The electric water heater provided by the embodiment comprises a shell 100, a heating device 200 and a filtering device 300, the heating device 200 and the filtering device 300 are arranged in the shell 100, the shell 100 can comprise a cylinder body 101, a first end cover 102 and a second end cover 103, a center line of the cylinder body 101 is parallel to a horizontal plane, the first end cover 102 is connected to one end of the cylinder body 101 in the extension direction, the second end cover 103 is connected to the other end of the cylinder body 101 in the extension direction, a baffle 104 can be arranged in the cylinder body 101, and the baffle 104 is perpendicular to the center line of the cylinder body 101.

[0049] Continuing to refer to Figure 3The heating device 200 comprises an inner container 210, which can be arranged between the second end cover 103 and the baffle 104. The space between the second end cover 103 and the baffle 104 and outside the inner container 210 can be filled with foaming material, which can insulate the inner container 210 to reduce the energy consumption of the electric water heater.

[0050] The inner container 210 is provided with a heating pipe 213. The inner container 210 is provided with a first water inlet pipe 211 and a first water outlet pipe 212. The first water inlet pipe 211 is used for inputting water into the inner container 210. The heating pipe 213 is used for heating the water in the inner container 210. The first water outlet pipe 212 is used for outputting the hot water in the inner container 210 for use by the user.

[0051] The inner container 210 can also be provided with a magnesium rod 214 to protect the inner container 210 and the heating pipe 213, slow down the corrosion speed of the inner container 210 and the heating pipe 213, and prolong the service life of the electric water heater.

[0052] As shown in Figure 4 and Figure 5 The filter device 300 comprises a housing 310 and a filter structure 320 arranged in the housing 310. The housing 310 is provided with a second water inlet pipe 311 and a second water outlet pipe 312. The second water inlet pipe 311 is used for connecting to a tap water pipe. The second water outlet pipe 312 is in communication with the first water inlet pipe 211.

[0053] The filter structure 320 is arranged between the second water inlet pipe 311 and the second water outlet pipe 312. The tap water enters the housing 310 from the second water inlet pipe 311, passes through the filter structure 320 to filter out solid impurities, and then is discharged from the second water outlet pipe 312 and flows into the inner container 210 from the first water inlet pipe 211.

[0054] The filter device 300 is arranged between the first water inlet pipe 211 and the tap water pipe. The filter device 300 is used for filtering the solid impurities in the tap water. The tap water filtered by the filter device 300 enters the inner container 210 from the first water inlet pipe 211, which improves the water quality in the inner container 210 and further improves the water quality of the hot water discharged from the first water outlet pipe 212, thereby improving the user experience.

[0055] The filter device 300 can be arranged between the first end cover 102 and the baffle 104. The baffle 104 separates the filter device 300 and the heating device 200. The foaming material is only filled between the baffle 104 and the second end cover 103, and the baffle 104 and the first end cover 102 do not need to be filled with foaming material.

[0056] The electric water heater in the embodiment comprises a heating device 200 and a filtering device 300. The heating device 200 comprises an inner container 210, and the inner container 210 is provided with a first water inlet pipe 211. The filtering device 300 comprises a shell 310 and a filtering structure 320 arranged in the shell 310. The shell 310 is provided with a second water inlet pipe 311 and a second water outlet pipe 312. The second water inlet pipe 311 is used for connecting a tap water pipe. The second water outlet pipe 312 is communicated with the first water inlet pipe 211. The filtering structure 320 is arranged between the second water inlet pipe 311 and the second water outlet pipe 312. Through the above arrangement, the filtering device 300 filters the solid impurities in the tap water. The water filtered of the solid impurities is injected into the inner container 210 from the first water inlet pipe 211, thereby improving the water quality in the inner container 210 and further improving the water quality of the hot water discharged from the first water outlet pipe 212, and improving the user experience.

[0057] With reference to Figure 1 and Figure 3 continuously, a maintenance opening can be arranged on the first end cover 102. A maintenance cover 105 is arranged on the maintenance opening. The maintenance cover 105 and the first end cover 102 can be connected through self-tapping screws or fastening bolts. The second water inlet pipe 311 and the tap water pipe can be connected through a total water inlet pipe 106. The total water inlet pipe 106 is arranged on the maintenance cover 105. A thread can be arranged on the outer wall of the end of the total water inlet pipe 106 facing the second water inlet pipe 311. A thread can also be arranged on the outer wall of the end of the second water inlet pipe 311 facing the total water inlet pipe 106. A fixing nut is arranged outside the total water inlet pipe 106 and the second water inlet pipe 311, and the fixing nut is matched with the threads on the total water inlet pipe 106 and the second water inlet pipe 311.

[0058] With reference to Figures 2-4 continuously, the second water outlet pipe 312 and the first water inlet pipe 211 can be connected through a connecting pipe 215. A thread can be arranged on the outer wall of the end of the second water outlet pipe 312 facing the first water inlet pipe 211. A thread can also be arranged on the outer wall of the end of the connecting pipe 215 facing the second water outlet pipe 312. A fixing nut is arranged outside the second water outlet pipe 312 and the connecting pipe 215, and the fixing nut is matched with the threads on the second water outlet pipe 312 and the connecting pipe 215.

[0059] When the filtering device 300 needs to be maintained or replaced, the maintenance cover 105 is opened. The fixing nuts at the second water inlet pipe 311 and the second water outlet pipe 312 are rotated respectively, so that the shell 310 is separated from the total water inlet pipe 106 and the connecting pipe 215. Then the filtering device 300 is taken out from the maintenance opening, thereby facilitating the maintenance or replacement of the filtering device 300.

[0060] With reference to Figure 1 and Figure 3The connecting pipe 215 and the first water inlet pipe 211 can be arranged in the shell 100, and only the total water inlet pipe 106 and the first water outlet pipe 212 extend out of the shell 100, so that the user cannot observe the connecting pipe 215 and the first water inlet pipe 211 from outside the shell 100, thereby improving the decoration effect of the electric water heater.

[0061] In some embodiments, the filtering structure 320 divides the shell 310 into a first space 323 and a second space, the second water outlet pipe 312 communicates with the first space 323, and the second water inlet pipe 311 communicates with the second space.

[0062] Tap water enters the second space from the second water inlet pipe 311, and the water injected into the shell 310 from the second water inlet pipe 311 flows through the filtering structure 320 in the process of flowing to the second water outlet pipe 312. The filtering structure 320 filters solid impurities in the water, and the filtered solid impurities are blocked outside the first space 323 (in the second space), so that the water in the first space 323 does not contain solid impurities, thereby improving the water quality in the inner container 210, and further improving the water quality of the hot water discharged from the first water outlet pipe 212, and improving the user experience.

[0063] In some preferred implementations, the filtering structure 320 includes a filter cartridge, the filter cartridge has a mesh on a cartridge wall, and the filter cartridge has an opening; the shell includes a first side wall 313, the first side wall 313 blocks the opening, the first side wall 313 and the filter cartridge surround to form the first space 323, and the second water outlet pipe 312 is connected to the first side wall 313.

[0064] The filter cartridge filters solid impurities in the water, so that the water in the first space 323 does not contain solid impurities, thereby improving the water quality of the water injected into the inner container 210.

[0065] Alternatively, the filtering structure 320 can also include a filter plate arranged in the shell 310, the filter plate is perpendicular to the center line of the shell 310, the filter plate divides the shell 310 into the first space 323 and the second space, the second water inlet pipe 311 communicates with the second space, and the second water outlet pipe 312 communicates with the first space 323. The water in the second space flows to the first space 323 after being filtered by the filter plate, and the water in the first space 323 is filtered water, thereby improving the water quality of the water entering the inner container 210, further improving the water quality of the hot water discharged from the first water outlet pipe 212, and improving the user experience.

[0066] In the implementation where the filtering structure 320 comprises a filtering cylinder, the filtering cylinder comprises a filtering screen 321 and a water baffle 322, the filtering screen 321 is tubular, the filtering screen 321 has meshes, the water baffle 322 is connected to one end of the filtering screen 321 away from the first side wall 313, a preset gap is formed between the outer side of the filtering screen 321 and the inner wall of the shell 310, and the solid impurities filtered by the filtering screen 321 sink downward from the preset gap to the bottom of the shell 310; the second water inlet pipe 311 communicates with the second space on the side of the water baffle 322 away from the filtering screen 321.

[0067] The width of the filtering screen 321 in the direction perpendicular to the center line can be equal from one end of the extension direction to the other end, that is, the filtering screen 321 is a side wall of a cylinder. Of course, the width of the filtering screen 321 in the direction perpendicular to the center line can also decrease toward the second water outlet pipe 312. For example, the filtering screen 321 can be a side wall of a circular truncated cone.

[0068] Continuing to refer to Figure 4 and Figure 5 , the shell 310 has a third space 316 (that is, the second space on the side of the water baffle 322 away from the filtering screen 321), the third space 316 is located on the side of the water baffle 322 away from the filtering screen 321, and the second water inlet pipe 311 communicates with the third space 316, so as to avoid that the second water inlet pipe 311 is directly opposite the filtering screen 321, thereby avoiding that the water entering the shell 310 from the second water inlet pipe 311 impacts the filtering screen 321, so as to reduce the speed of the water passing through the filtering screen 321 and improve the filtering effect of the filtering screen 321. When the second water inlet pipe 311 is directly opposite the filtering screen 321, the water entering the shell 310 from the second water inlet pipe 311 will impact the filtering screen 321 and cause the impurities to be washed into the first space 323 from the meshes, thereby reducing the water quality of the water in the first space 323.

[0069] The shell 310 described above can further comprise a second side wall 314 and a third side wall 315, the second side wall 314 is tubular, the center line of the second side wall 314 is parallel to the horizontal plane, one end of the extension direction of the second side wall 314 is connected to the first side wall 313, and the other end of the extension direction of the second side wall 314 is connected to the third side wall 315, and the first side wall 313, the second side wall 314 and the third side wall 315 surround to form a closed space.

[0070] The second water inlet pipe 311 communicates with the third space 316. For example, the second water inlet pipe 311 can be arranged on the third side wall 315 and directly opposite the water baffle 322, so that the water entering the shell 310 from the second water inlet pipe 311 impacts the water baffle 322.

[0071] Preferably, as Figure 5As shown, the second water inlet pipe 311 is connected to the second side wall 314, and the projection of the filter screen 321 on the second side wall 314 is located outside the second water outlet pipe 312. Thus, the water entering the shell 310 from the second water inlet pipe 311 impacts the third side wall 315 without impacting the filter screen 321, thereby reducing the speed of the water passing through the filter screen 321 and improving the filtering effect of the filter screen 321.

[0072] Further, the second water inlet pipe 311 is connected to the second side wall 314 at a position close to the third side wall 315, so that the second water inlet pipe 311 is away from the filter screen 321, further avoiding the water from impacting the filter screen 321.

[0073] Continuing to refer to Figure 2 and Figure 3 In some embodiments, the bottom end of the shell 310 is connected with a drain pipe 317, and the drain pipe 317 is provided with a drain valve 318.

[0074] In some implementations, the drain pipe 317 can extend to outside the outer shell 100, and the drain valve 318 can also be located outside the outer shell 100. When it is needed to discharge the impurities in the shell 310, the drain valve 318 is opened, and the impurities in the shell 310 are discharged along with the water through the drain pipe 317, so as to discharge the impurities in the shell 310.

[0075] In other implementations, the drain pipe 317 and the drain valve 318 are both arranged in the outer shell 100, and the bottom of the outer shell 100 is provided with a drain opening located below the drain valve 318. When it is needed to discharge the impurities in the shell 310, the drain valve 318 is opened through the drain opening, and the impurities in the shell 310 are discharged along with the water through the drain pipe 317 and the drain opening, so as to discharge the impurities in the shell 310.

[0076] In some preferred implementations, the drain pipe 317 and the drain valve 318 are both arranged in the outer shell 100, and the bottom of the outer shell 100 is provided with a drain opening located below the drain valve 318. The drain pipe 317 can be a hose, and the end of the drain pipe 317 can extend to outside the drain opening. When it is needed to discharge the impurities in the shell 310, the end of the drain pipe 317 is moved to outside the drain opening, and the drain valve 318 is opened. The impurities in the shell 310 are discharged along with the water through the drain pipe 317, so as to discharge the impurities in the shell 310. At the same time, the impurities can be prevented from adhering to the inner wall of the outer shell 100, so as to keep the outer shell 100 clean.

[0077] Continuing to refer to Figure 3 and Figure 4 In the implementation in which the bottom of the outer shell 100 is provided with the drain opening, the drain opening is covered with a drain cover 107, and the drain cover 107 is used to block the drain opening, so as to shield the filter device 300 and improve the decoration effect of the electric water heater.

[0078] In some embodiments, the electric water heater further comprises a deodorization structure arranged in the first space 323, and the deodorization structure is used to remove odor in water.

[0079] Specifically, the deodorization structure can comprise activated carbon and an activated carbon filter screen, the activated carbon is arranged in the first space 323, and the activated carbon filter screen is arranged at one end of the second water outlet pipe 312 close to the filter screen 321. The activated carbon can remove odor in water in the first space 323, and further remove odor in water entering the inner container 210. The activated carbon filter screen is used to prevent solid particles falling off the activated carbon from entering the second water outlet pipe 312 and the inner container 210.

[0080] Alternatively, the deodorization structure can further comprise bamboo charcoal and a bamboo charcoal filter screen, the bamboo charcoal is arranged in the first space 323, and the bamboo charcoal filter screen is arranged at one end of the second water outlet pipe 312 close to the filter screen 321. The bamboo charcoal can remove odor in water in the first space 323, and further remove odor in water entering the inner container 210. The bamboo charcoal filter screen is used to prevent solid particles falling off the bamboo charcoal from entering the second water outlet pipe 312 and the inner container 210.

[0081] In summary, the electric water heater of the present application comprises a heating device 200 and a filtering device 300, the heating device 200 comprises an inner container 210, and the inner container 210 is provided with a first water inlet pipe 211; the filtering device 300 comprises a shell 310 and a filtering structure 320 arranged in the shell 310, the shell 310 is provided with a second water inlet pipe 311 and a second water outlet pipe 312, the second water inlet pipe 311 is used to connect a tap water pipe, the second water outlet pipe 312 is communicated with the first water inlet pipe 211, and the filtering structure 320 is arranged between the second water inlet pipe 311 and the second water outlet pipe 312. Through the above arrangement, the filtering device 300 filters solid impurities in tap water, and water filtered of the solid impurities is injected into the inner container 210 from the first water inlet pipe 211, thereby improving water quality in the inner container 210, and further improving water quality of hot water discharged from the first water outlet pipe 212, and improving user experience.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric water heater, characterised in that, The electric water heater comprises a shell, a heating device, and a filtering device. The heating device comprises an inner container with a first water inlet pipe. The filtering device comprises a shell and a filtering structure. The shell has a second water inlet pipe and a second water outlet pipe. The second water inlet pipe is used to connect a tap water pipe. The second water outlet pipe is communicated with the first water inlet pipe. The filtering structure is arranged in the shell and between the second water inlet pipe and the second water outlet pipe. The heating device and the filtering device are arranged in the shell. The shell comprises a barrel, a first end cover, and a second end cover.

2. The electric water heater according to claim 1, characterized in that The first end cover is connected to one end of the barrel in the extending direction.

3. The electric water heater according to claim 2, wherein The second end cover is connected to the other end of the barrel in the extending direction.

4. The electric water heater according to claim 3, wherein A baffle is arranged in the barrel and perpendicular to the center line of the barrel.

5. The electric water heater according to claim 4, wherein The inner container is arranged between the second end cover and the baffle.

6. The electric water heater according to claim 3, wherein The filtering device is arranged between the first end cover and the baffle.

7. The electric water heater according to claim 6, wherein The filtering structure divides the shell into a first space and a second space.

8. The electric water heater according to claim 1, wherein The second water outlet pipe is communicated with the first space.

9. The electric water heater according to claim 8, wherein The second water inlet pipe is communicated with the second space. The filtering structure comprises a filter cartridge with an opening. The shell comprises a first side wall which seals the opening. The filter cartridge comprises a filter screen and a water baffle. The water baffle is connected to one end of the filter screen away from the first side wall. There is a preset gap between the outer side of the filter screen and the inner wall of the shell. The second water inlet pipe is communicated with the second space on the side of the water baffle away from the filter screen. The filter cartridge has mesh on the barrel wall. The first side wall and the filter cartridge enclose the first space. The second water outlet pipe is connected to the first side wall. The filter screen is tubular and has mesh on it. The shell further comprises a second side wall and a third side wall. The second side wall is tubular and has a center line parallel to the horizontal plane. One end of the second side wall in the extending direction is connected to the first side wall. The other end of the second side wall in the extending direction is connected to the third side wall. The first side wall, the second side wall, and the third side wall enclose a closed space. The second water inlet pipe is connected to the second side wall. The projection of the filter screen on the second side wall is located outside the second water outlet pipe. The second water inlet pipe is connected to one end of the second side wall close to the third side wall. The shell has a drain pipe at the bottom end. The drain pipe is provided with a drain valve. The bottom of the shell is provided with a drain opening below the drain valve. The drain opening is covered with a drain cover which is used to seal the drain opening. The electric water heater further comprises a deodorizing structure arranged in the first space. The deodorizing structure is used to remove odors in water. The deodorizing structure comprises activated carbon and an activated carbon filter screen. The activated carbon is arranged in the first space. The activated carbon filter screen covers one end of the second water outlet pipe close to the filter screen.

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