Composite filter element device and water purification equipment

Abstract

The utility model provides a composite filter element device and water purification equipment, and the composite filter element device comprises a shell which is provided with an inner cavity, a raw water inlet, a primarily filtered water outlet, a primarily filtered water inlet, a pure water outlet and a wastewater outlet, and the primarily filtered water outlet is communicated with the primarily filtered water inlet; the first filtering module is arranged in the inner cavity, is communicated with the raw water inlet and the primarily filtered water outlet, and is used for filtering water output by the water supply device; the second filtering module is arranged in the inner cavity, the second filtering module and the first filtering module are sequentially arranged in the length direction of the shell, a primary filtered water inlet flow channel is defined by the outer wall of the second filtering module, the outer wall of the first filtering module and the cavity wall of the inner cavity, and one end of the primary filtered water inlet flow channel communicates with the primary filtered water inlet; the other end of the primary filtered water inlet flow channel is communicated with the second filtering module; the second filtering module is communicated with the pure water outlet and the wastewater outlet. The overall size of the composite filter element device can be reduced, so that the space occupied by the composite filter element device in the water purification equipment can be reduced.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a composite filter element device and water purification equipment. Background Technology

[0002] With economic development and social progress, people have increasingly higher requirements for drinking water. Most households are now equipped with water purification equipment, such as water softeners, ultrafiltration machines, and reverse osmosis water purifiers. The emergence of different types of water purification equipment meets people's diverse water needs, improves their living standards, and enhances their water health.

[0003] Existing water purification equipment uses multi-stage filtration to filter water, such as 3 filters (i.e., pre-filter, RO membrane filter, and post-filter) or 2 filters (i.e., pre- and post-filter composite filter and RO membrane filter). Using multiple filters takes up a lot of space, which prevents the water purification equipment from being made smaller; and the large size of the water purification equipment results in a large amount of under-sink space being occupied. Utility Model Content

[0004] This application provides a composite filter element device and a water purification equipment to solve the problem of large space occupation in related technologies. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a composite filter element device, comprising:

[0006] The housing has an inner cavity, a raw water inlet, a primary filtered water outlet, a pure water outlet, and a wastewater outlet. The raw water inlet is used to connect with an external water supply device, and the primary filtered water outlet is connected to the primary filtered water inlet.

[0007] A first filter module is disposed within the inner cavity and is connected to the raw water inlet and the pre-filtered water outlet. The first filter module is used to filter the water output from the water supply device.

[0008] The second filter module is disposed within the inner cavity. The second filter module and the first filter module are arranged sequentially along the length of the outer shell. The outer wall of the second filter module, the outer wall of the first filter module, and the cavity wall of the inner cavity form a primary filtration water inlet channel. One end of the primary filtration water inlet channel is connected to the primary filtration water inlet, and the other end of the primary filtration water inlet channel is connected to the second filter module. The second filter module is connected to the pure water outlet and the wastewater outlet. The second filter module is used to filter the water output by the first filter module.

[0009] In one embodiment, the first filtering module includes:

[0010] A filter barrel, the filter barrel having a cavity, a raw water inlet channel and a first pre-filtered water outlet channel, the raw water inlet channel being connected to the raw water inlet, and the first pre-filtered water outlet channel being connected to the pre-filtered water outlet;

[0011] The first filter element is disposed in the cavity. The outer peripheral wall of the first filter element and the inner wall of the cavity form a raw water flow channel. The raw water flow channel is connected to the raw water inlet channel and the first filter element. The first filter element is used to filter the water output by the external water supply device.

[0012] The second filter element is disposed inside the first filter element and is connected to the first filter element. The second filter element is used to filter the water filtered by the first filter element.

[0013] A first end cap, located within the cavity, connects to the filter barrel. The first end cap is fitted onto the axial first end of the first filter element and the axial second end of the second filter element. The first end cap has a connecting hole that connects the second filter element to the first pre-filtered water outlet channel.

[0014] The second end cap is located inside the cavity and is sleeved on the axial second end of the first filter element and the axial second end of the second filter element. The second end cap is connected to the filter barrel.

[0015] In one embodiment, the second filtering module includes:

[0016] A first filter module, connected to the primary filtered water inlet channel and the wastewater outlet, is used to filter the water output from the first filter module; and

[0017] The second filter group is located inside the first filter module and is connected to the first filter module and the pure water outlet. The second filter group is used to filter the water output by the first filter module.

[0018] In one embodiment, the first filtering module includes:

[0019] The third filter element is connected to the primary filtered water inlet channel and the wastewater outlet.

[0020] An outer end cap, wherein the outer end cap is sleeved on the axial first end of the third filter element, and the outer end cap is connected to the second end cap; and

[0021] A positioning ring is sleeved on the outer peripheral wall of the third filter element. The positioning ring is located on one end close to the second axial end of the third filter element, and the positioning ring is connected to the cavity wall of the inner cavity.

[0022] In one embodiment, the second filter group includes:

[0023] A first inner end cap, the first inner end cap being connected to the outer end cap;

[0024] A support tube, the first axial end of which is connected to the first inner end cap, the support tube having a pure water flow channel, the pure water flow channel being connected to the pure water outlet;

[0025] The second inner end cap is disposed at the second axial end of the support tube;

[0026] The fourth filter element is sleeved on the outer peripheral wall of the support tube. The first axial end of the fourth filter element abuts against the first inner end cap, and the second axial end of the fourth filter element abuts against the second inner end cap. The fourth filter element connects the pure water flow channel and the third filter element.

[0027] In one embodiment, the second filter group further includes:

[0028] A protective tube is sleeved on the outer peripheral wall of the fourth filter element. One end of the protective tube is connected to the first inner end cap, and the other end of the protective tube is connected to the second inner end cap. The protective tube has a water passage hole that connects the third filter element and the fourth filter element.

[0029] In one embodiment, one end of the protective tube is provided with a first snap-fit ​​portion, and the other end of the protective tube is provided with a second snap-fit ​​portion;

[0030] The first inner end cover is provided with a third snap-fit ​​part, which cooperates with the first snap-fit ​​part to connect the first inner end cover and the protective tube together;

[0031] The second inner end cover is provided with a fourth snap-fit ​​part, which cooperates with the second snap-fit ​​part to connect the second inner end cover and the protective tube together.

[0032] In one embodiment, the composite filter device further includes:

[0033] An outer tube passes through the first filter module. The outer peripheral wall of the outer tube and the inner peripheral wall of the first filter module form a second primary filtered water outlet channel. The second primary filtered water outlet channel connects the first filter module and the first primary filtered water outlet channel.

[0034] The inner tube passes through the outer tube and has a pure water outlet channel that connects the second filter module and the pure water outlet. The outer peripheral wall of the inner tube and the inner peripheral wall of the outer tube form a wastewater outlet channel that connects the second filter module and the wastewater outlet.

[0035] In one embodiment, the housing includes:

[0036] The shell body has the inner cavity. The first end of the shell body has the raw water inlet, the primary filtered water inlet, the primary filtered water outlet, the pure water outlet and the wastewater outlet. The second end of the shell body has an installation port for the first filter module and the second filter module to enter and exit the installation port.

[0037] A cover, which is detachably disposed on the body of the housing, and which can cover the mounting opening;

[0038] The first filter module and the shell body are detachably connected, the second filter module is connected to the first filter module, and the second filter module abuts against the shell cover.

[0039] Secondly, embodiments of this application provide a water purification device, including the aforementioned composite filter cartridge device.

[0040] The advantages or beneficial effects of the above technical solutions include at least the following:

[0041] This utility model discloses a composite filter element device. By sequentially arranging a first filter module and a second filter module within a housing along its length, or by stacking the first and second filter modules vertically within the housing, the device integrates first and second filter modules with different filtration functions into a single composite filter element device. This results in a simple structure and significantly reduces the overall volume of the composite filter element device, thereby reducing the space occupied by the composite filter element device in the water purification equipment and consequently reducing the size of the water purification equipment. Furthermore, by integrating the first and second filter modules with different filtration functions into a single composite filter element, filtration performance is improved, the replacement frequency of the composite filter element is reduced, and thus operating costs are lowered.

[0042] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0043] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0044] Figure 1 This is a three-dimensional structural diagram of the composite filter element device of this utility model from a first-view perspective.

[0045] Figure 2 This is a three-dimensional structural diagram of the composite filter element device of this utility model from a second perspective.

[0046] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0047] Figure 4 This is a three-dimensional structural diagram of the first filter module in this utility model;

[0048] Figure 5 This is a cross-sectional view of the first filter module in this utility model;

[0049] Figure 6 This is a cross-sectional view of the second filter module in this utility model.

[0050] Figure Labels

[0051] 1. Outer shell; 11. Shell body; 111. Inner cavity; 112. Raw water inlet; 113. Pre-filtered water outlet; 114. Pre-filtered water inlet; 115. Pure water outlet; 116. Wastewater outlet; 117. First connecting groove; 12. Shell cover; 2. First filter module; 21. Filter barrel; 211. Cavity; 212. Raw water inlet channel; 213. First pre-filtered water outlet channel; 214. Raw water channel; 215. First connecting part; 216. Second connecting part 217. Third connecting groove; 218. Fourth connecting groove; 22. First filter element; 23. Second filter element; 24. First end cap; 241. Connecting hole; 242. Third connecting part; 25. Second end cap; 251. Fourth connecting part; 3. Second filter module; 31. First filter module; 311. Third filter element; 312. Outer end cap; 3121. Second connecting part; 313. Positioning ring; 32. Second filter group; 321. First inner end cap; 322. Support tube; 3221. Pure water flow channel; 323. Second inner end cap; 324. Fourth filter element; 325. Protective tube; 3251. Water passage hole; 326. Filter cloth; 4. Primary filtration water inlet flow channel; 5. Outer tube; 51. Isolation protrusion; 6. Second primary filtration water outlet flow channel; 7. Inner tube; 71. Pure water outlet flow channel; 8. Wastewater outlet flow channel. Detailed Implementation

[0052] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0053] See Figures 1-6 This invention illustrates a preferred embodiment of a composite filter element device, comprising:

[0054] The outer casing 1 has an inner cavity 111, a raw water inlet 112, a primary filtered water outlet 113, a primary filtered water inlet 114, a pure water outlet 115, and a wastewater outlet 116. The raw water inlet 112 is used to connect with an external water supply device (not shown in the figure) so that the water output by the external water supply device can be delivered to the raw water inlet 112. The primary filtered water outlet 113 is connected to the primary filtered water inlet 114.

[0055] A first filter module 2 is disposed within the inner cavity 111. The first filter module 2 is connected to the raw water inlet 112 and the primary filtered water outlet 113, allowing water output from the external water supply device to be delivered to the first filter module 2. Simultaneously, the primary filtered water from the first filter module 2 is output to the primary filtered water outlet 113. The first filter module 2 is used to filter the water output from the water supply device; and

[0056] The second filter module 3 is disposed within the inner cavity 111. The second filter module 3 and the first filter module 31 are arranged sequentially along the length of the outer shell 1, that is, the second filter module 3 and the first filter module 31 are arranged in a stacked manner within the outer shell 1. The outer wall of the second filter module 3, the outer wall of the first filter module 31, and the cavity wall of the inner cavity 111 form the primary filtration water inlet channel 4. One end of the primary filtration water inlet channel 4 is connected to the primary filtration water inlet 114, and the other end of the primary filtration water inlet channel 4 is connected to the second filter module. 3, so that the pre-filtered water after filtration by the first filter module 2 can be transported to the second filter module 3 through the pre-filtered water inlet channel 4, providing a water source for the second filter module 3. The second filter module 3 is connected to the pure water outlet 115 and the wastewater outlet 116, so that the pure water after filtration by the second filter module 3 is transported to the pure water outlet 115 for drinking, and at the same time, so that the wastewater generated by the second filter module 3 is transported to the wastewater outlet 116 to achieve wastewater discharge. The second filter module 3 is used to filter the water output by the first filter module 2.

[0057] The composite filter element device of this utility model integrates the first filter module 2 and the second filter module 3 with different filtration functions into a single composite filter element device by arranging the first filter module 2 and the second filter module 3 sequentially along the length of the outer shell 1, or by stacking the first filter module 2 and the second filter module 3 vertically within the outer shell 1. This results in a simple structure and a significant reduction in the overall volume of the composite filter element device, thereby reducing the space occupied by the composite filter element device in the water purification equipment and thus reducing the volume of the water purification equipment. In addition, by integrating the first filter module 2 and the second filter module 3 with different filtration functions into a single composite filter element, the filtration performance can be improved and the replacement frequency of the composite filter element can be reduced, thereby reducing the operating cost.

[0058] See Figures 1-3 In one embodiment, the housing 1 includes:

[0059] The shell body 11 has an inner cavity 111. The first end of the shell body 11 has the above-mentioned raw water inlet 112, primary filtered water inlet 114, primary filtered water outlet 113, pure water outlet 115 and wastewater outlet 116. The second end of the shell body 11 has an installation port for the first filter module 2 and the second filter module 3 to enter and exit the installation port.

[0060] The cover 12 is detachably provided on the body 11. The cover 12 can cover the installation opening. That is, when the cover 12 and the body 11 are connected, the cover 12 covers the installation opening to close the installation opening. When the cover 12 is detached from the body 11, the cover 12 detaches from the installation opening to open the installation opening.

[0061] The first filter module 2 is detachably connected to the housing body 11, and the second filter module 3 is connected to the first filter module 2. The second filter module abuts against the housing cover 12. In this way, the first filter module 2 and the second filter module 3 can be reliably installed in the housing 1, and the first filter module 2 and the second filter module 3 can be detached and installed, making it convenient to replace the first filter module 2 and the second filter module 3.

[0062] In one embodiment, the second filter module 3 and the first filter module 2 are detachably connected, so that the second filter module 3 and the first filter module 2 can be separated, facilitating the independent replacement of the second filter module 3 and the first filter module 2.

[0063] Of course, in other embodiments, the second filter module 3 and the first filter module 2 can be connected by a fixed connection.

[0064] In one embodiment, the first filter module 2 and the outer shell 1 are snapped together, so as to enable tool-free disassembly and assembly of the first filter module 2 and the outer shell 1, thereby improving the disassembly and assembly efficiency of the first filter module 2.

[0065] The second filter module 3 is snapped together with the first filter module 2 to enable tool-free disassembly and assembly of the second filter module 3 and the first filter module 2, thereby improving the disassembly and assembly efficiency of the second filter module 3.

[0066] Of course, in other embodiments, the first filter module 2 and the outer shell 1 can also be connected by a threaded connection, and the second filter module 3 and the first filter module 2 can also be connected by a threaded connection.

[0067] See Figures 3-5 In one embodiment, the first filter module 2 includes:

[0068] The filter barrel 21 has a cavity 211, a raw water inlet channel 212 and a first primary filtered water outlet channel 213. The raw water inlet channel 212 is connected to the raw water inlet 112, and the first primary filtered water outlet channel 213 is connected to the primary filtered water outlet 113.

[0069] The first filter element 22 is disposed inside the cavity 211. The outer peripheral wall of the first filter element 22 and the inner wall of the cavity 211 form a raw water flow channel 214. The raw water flow channel 214 connects the raw water inlet channel 212 and the first filter element 22, so that the water output from the external water supply device can be sequentially transported to the first filter element 22 through the raw water inlet channel 212 and the raw water flow channel 214, and then enter the first filter element 22 from the outer peripheral wall of the first filter element 22 for filtration. The first filter element 22 is used to filter the water output from the external water supply device.

[0070] The second filter element 23 is disposed in the central hole of the first filter element 22 and is connected to the first filter element 22 so that the water filtered by the first filter element 22 can be delivered to the second filter element 23. The second filter element 23 is used to filter the water filtered by the first filter element 22.

[0071] A first end cap 24 is located inside the cavity 211 and connects to the filter barrel 21. The first end cap 24 is fitted onto the axial first end of the first filter element 22 and the axial second end of the second filter element 23 to seal the axial first end of the first filter element 22 and the axial second end of the second filter element 23. The first end cap 24 has a connecting hole 241 that connects the second filter element 23 and the first primary filtered water outlet channel 213, allowing the primary filtered water formed after filtration by the second filter element 23 to be transported to the first primary filtered water outlet channel 213 through the connecting hole 241.

[0072] The second end cap 25 is located inside the cavity 211. The second end cap 25 is sleeved on the axial second end of the first filter element 22 and the axial second end of the second filter element 23 to seal the axial second end of the first filter element 22 and the axial second end of the second filter element 23. The second end cap 25 is connected to the filter barrel 21. Since the first filter module 2 is equipped with a first filter element 22 and a second filter element 23 with different filtration functions, a composite filter element structure is formed, which can improve filtration performance. At the same time, since the second filter element 23 is located inside the first filter element 22, the internal space utilization rate of the first filter element 22 is improved, which can reduce the volume of the first filter module 2 and reduce the space occupied by the first filter module 2 in the outer shell 1, thereby further reducing the volume of the composite filter element device. In addition, the first end cap 24 and the second end cap 25 respectively encapsulate the first axial first end and the second axial second end of the first filter element 22 and the second filter element 23, which can reliably install the first filter element 22 and the second filter element 23 in the filter barrel 21, and can also seal the first axial first end and the second axial second end of the first filter element 22 and the second filter element 23, preventing water leakage or water ingress from the first axial first end and the second axial second end of the first filter element 22 and the second filter element 23.

[0073] In one embodiment, the first filter element 22 is a PP cotton filter element, and the second filter element 23 is a carbon rod filter element. The main function of the PP cotton filter element is to filter large particulate impurities, such as silt and rust, and to protect the subsequent carbon rod filter element from clogging. The carbon rod filter element is mainly used to remove organic matter and odors from the water. This combination can give full play to the advantages of both, achieve more comprehensive water filtration, and provide cleaner pre-filtered water.

[0074] In one embodiment, the second filter element 23 is preferably a scale-inhibiting carbon rod filter element, which can effectively prevent the formation and deposition of scale and maintain water quality.

[0075] See Figure 3 In one embodiment, one end of the filter barrel 21 is connected to the shell body 11 to connect the first filter module 2 and the shell body 11 together, thereby installing the first filter module 2 inside the shell 1. The other end of the filter barrel 21 is connected to the second filter module 3 to connect the second filter module 3 and the first filter module 2 together, thereby stably installing the second filter module 3 inside the shell 1.

[0076] See Figure 3 In one embodiment, the shell body 11 further has a first connecting groove 117, which is located in the inner cavity 111 and is arranged around the center line of the length direction of the shell 1.

[0077] The filter barrel 21 is provided with a first connecting part 215, which is engaged in the first connecting groove 117 to realize the detachable connection between the filter barrel 21 and the shell body 11, that is, the first filter module 2 and the shell body 11 can be detachably connected together.

[0078] To prevent water leakage, a first sealing ring is sandwiched between the inner wall of the first connecting groove 117 and the outer wall of the first connecting part 215 to seal the gap between the first connecting groove 117 and the first connecting part 215 and prevent water leakage.

[0079] See Figures 3-6 In one embodiment, the filter barrel 21 has a second connecting groove 216, which is arranged around the center line of the outer casing 1 in the length direction.

[0080] The second filter module 3 is provided with a second connecting part 3121, which is engaged in the second connecting groove 216 to realize the detachable connection of the filter barrel 21 and the second filter module 3 together, that is, the first filter module 2 and the second filter module 3 can be detachably connected together.

[0081] To prevent water leakage, a second sealing ring is sandwiched between the inner wall of the second connecting groove 216 and the outer wall of the second connecting part 3121 to seal the gap between the second connecting groove 216 and the second connecting part 3121 and prevent water leakage.

[0082] See Figure 5 In one embodiment, the filter barrel 21 has a third connecting groove 217, which is arranged around the center line of the length direction of the outer casing 1.

[0083] The first end cap 24 is provided with a third connecting part 242, which is engaged in the third connecting groove 217 to connect the first end cap 24 and the filter barrel 21 together. The structure is simple and practical, easy to disassemble and assemble, and has high disassembly and assembly efficiency.

[0084] See Figure 3 In one embodiment, a third sealing ring is provided between the side wall of the third connecting groove 217 and the outer wall of the third connecting part 242 to seal the gap between the third connecting groove 217 and the third connecting part 242 and prevent water leakage.

[0085] See Figure 5 In one embodiment, the lid of the filter bucket 21 has a fourth connecting groove 218, which is arranged around the center line of the outer casing 1 in the length direction.

[0086] The second end cap 25 is provided with a fourth connecting part 251, which is engaged in the fourth connecting groove 218 to connect the second end cap 25 and the filter barrel 21 together, thereby facilitating the quick installation of the barrel cover of the filter barrel 21 and improving the structural stability of the first filter element 22 and the second filter element 23.

[0087] In one embodiment, a fourth sealing ring is provided between the side wall of the fourth connecting groove 218 and the outer wall of the fourth connecting part 251 to seal the gap between the fourth connecting groove 218 and the fourth connecting part 251 and prevent water leakage.

[0088] In one embodiment, the first end cap 24 has a first groove, which is adapted to the axial first end of the first filter element 22, that is, the axial first end of the first filter element 22 is inserted into the first groove to improve the connection stability between the first end cap 24 and the first filter element 22.

[0089] In one embodiment, an adhesive is provided between the sidewall of the first groove and the outer peripheral wall of the first axial end of the first filter element 22. The adhesive connects the sidewall of the first groove and the outer peripheral wall of the first axial end of the first filter element 22 to further improve the connection stability of the first end cap 24 and the first filter element 22, and at the same time, seals the gap between the first end cap 24 and the first axial end of the first filter element 22.

[0090] In one embodiment, the second end cap 25 has a second groove that is adapted to the axial second end of the first filter element 22, that is, the axial second end of the first filter element 22 is inserted into the second groove to improve the connection stability between the second end cap 25 and the first filter element 22.

[0091] In one embodiment, an adhesive is provided between the sidewall of the second groove and the outer peripheral wall of the axial second end of the first filter element 22. The adhesive connects the sidewall of the second groove and the outer peripheral wall of the axial second end of the first filter element 22 to further improve the connection stability of the second end cap 25 and the first filter element 22, and at the same time, seals the gap between the second end cap 25 and the axial second end of the first filter element 22.

[0092] See Figure 3 and Figure 6 In one embodiment, the second filter module 3 includes:

[0093] The first filter module 31 is connected to the primary filtration water inlet channel 4 and the wastewater outlet 116, so that the primary filtration water output from the first filter module 2 can be transported to the first filter module 31 through the primary filtration water inlet channel 4, and at the same time, the wastewater generated by the first filter module 31 is transported to the wastewater outlet 116. The first filter module 31 is used to filter the water output from the first filter module 2; and

[0094] The second filter group 32 is located within the central hole of the first filter module 31. The second filter group 32 connects to the first filter module 31 and the pure water outlet 115, allowing water filtered by the first filter module 31 to be delivered to the second filter group 32, and simultaneously allowing pure water filtered by the second filter group 32 to be delivered to the pure water outlet 115. The second filter group 32 is used to filter the water output from the first filter module 31. Because the second filter module 3 has a first filter module 31 and a second filter group 32 with different filtration functions, a composite filter element structure is formed, which improves filtration performance. Furthermore, since the second filter group 32 is located within the first filter module 31, the internal space utilization of the first filter module 31 is improved, reducing the volume of the second filter module 3 and the space occupied by the second filter module 3 in the outer casing 1, thereby further reducing the volume of the composite filter element device.

[0095] See Figure 3 and Figure 6 In one embodiment, the first filter module 31 includes:

[0096] The third filter element 311 is connected to the primary filtered water inlet channel 4 and the wastewater outlet 116, so that the primary filtered water output by the first filter module 2 can be transported to the third filter element 311 through the primary filtered water inlet channel 4, and at the same time, the wastewater generated by the third filter element 311 can be transported to the wastewater outlet 116.

[0097] An outer end cap 312 is sleeved on the axial first end of the third filter element 311. The outer end cap 312 is connected to the first filter module 2 to connect the second filter module 3 and the first filter module 2 together.

[0098] The positioning ring 313 is sleeved on the outer peripheral wall of the third filter element 311. The positioning ring 313 is located on one end close to the second axial end of the third filter element 311. The positioning ring 313 is connected to the cavity wall of the inner cavity 111 to connect the second filter module 3 and the outer shell 1 together, thereby reliably installing the second filter module 3 in the outer shell 1 and preventing the second filter module 3 from moving in the outer shell 1.

[0099] To improve the utilization rate of the third filter element 311, in one embodiment, the outer peripheral wall of the third filter element 311 is encapsulated with a gel to prevent water in the primary filtered water inlet channel 4 from entering the interior of the third filter element 311 through the outer peripheral wall of the third filter element 311. The end of the third filter element 311 facing away from the outer end cover 312 is connected to the primary filtered water inlet channel 4 to achieve axial water intake.

[0100] See Figures 3-6In order to connect the outer end cap 312 and the first filter module 2 together, the filter barrel 21 in the first filter module 2 is provided with a second connecting groove 216, which is arranged around the center line of the length direction of the outer shell 1.

[0101] The outer end cover 312 is provided with a second connecting part 3121, which is engaged in the second connecting groove 216 to realize the detachable connection of the filter barrel 21 and the second filter module 3, that is, the first filter module 2 and the second filter module 3 can be detachably connected together.

[0102] See Figure 3 and Figure 6 In one embodiment, the second filter group 32 includes:

[0103] The first inner end cover 321 is connected to the outer end cover 312;

[0104] The support tube 322 has an axial first end connected to a first inner end cap 321. The support tube 322 has a pure water flow channel 3221, which is connected to a pure water outlet 115.

[0105] The second inner end cap 323 is located at the second axial end of the support tube 322. The second inner end cap 323 is connected to the shell cover 12 of the outer shell 1 to achieve the contact between the second filter module 3 and the outer shell 1.

[0106] The fourth filter element 324 is sleeved on the outer peripheral wall of the support tube 322. The first axial end of the fourth filter element 324 abuts against the first inner end cap 321 to seal the first axial end of the fourth filter element 324. The second axial end of the fourth filter element 324 abuts against the second inner end cap 323 to seal the second axial end of the fourth filter element 324. The fourth filter element 324 connects the pure water flow channel 3221 and the third filter element 311 so that the water filtered by the third filter element 311 can be delivered to the fourth filter element. 324. Simultaneously, the pure water filtered by the fourth filter element 324 is transported to the pure water channel 3221, and then transported to the pure water outlet 115 through the pure water channel 3221 for drinking. Among them, the support tube 322 provides internal support for the fourth filter element 324, while the first inner end cap 321 and the second inner end cap 323 provide axial positioning for the fourth filter element 324, so that the fourth filter element 324 is reliably installed on the support tube 322 to form a modular second filter group 32, which is convenient for installation.

[0107] In one embodiment, the third filter element 311 is a reverse osmosis membrane filter element (i.e., RO membrane filter element), and the fourth filter element 324 is a carbon fiber filter element. The reverse osmosis membrane filter element has extremely high filtration accuracy and can remove impurities such as bacteria, viruses and heavy metals. The carbon fiber filter element can block pollutant particles and remove odors, organic matter, etc. The combination of the two can provide a more comprehensive water purification effect and ensure the safety and health of water quality.

[0108] Of course, in other embodiments, carbon rod filter elements can be used instead of the carbon fiber filter elements described above.

[0109] See Figure 3 and Figure 6 In one embodiment, the second filter group 32 further includes:

[0110] A protective tube 325 is sleeved on the outer peripheral wall of the fourth filter element 324. One end of the protective tube 325 is connected to the first inner end cap 321, and the other end is connected to the second inner end cap 323. The protective tube 325 has a water passage hole 3251, which connects the third filter element 311 and the fourth filter element 324, so that the water filtered by the third filter element 311 can be transported to the fourth filter element 324 through the water passage hole 3251. The protective tube 325 provides external support for the fourth filter element 324, preventing the third filter element 311 from damaging the fourth filter element 324.

[0111] In one embodiment, one end of the protective tube 325 is provided with a first snap-fit ​​portion, and the other end of the protective tube 325 is provided with a second snap-fit ​​portion.

[0112] The first inner end cap 321 is provided with a third snap-fit ​​part, which cooperates with the first snap-fit ​​part to connect the first inner end cap 321 and the protective tube 325 together, which can realize the tool-free connection of the first inner end cap 321 and the protective tube 325, making the connection operation simpler, more convenient and more efficient.

[0113] The second inner end cap 323 is provided with a fourth snap-fit ​​part, which cooperates with the second snap-fit ​​part to connect the second inner end cap 323 and the protective tube 325 together, enabling tool-free connection of the second inner end cap 323 and the protective tube 325, making the connection operation simpler, more convenient, and more efficient.

[0114] Of course, in other embodiments, the protective tube 325 can also be connected to the first inner end cap 321 and the second inner end cap 323 respectively by fasteners (such as screws or rivets).

[0115] Of course, in other embodiments, the protective tube 325 can also be connected to the first inner end cap 321 and the second inner end cap 323 respectively by means of a colloid.

[0116] See Figure 3 and Figure 6 In one embodiment, the second filter group 32 further includes:

[0117] Filter cloth 326 (e.g., non-woven fabric) is disposed in the pure water end of pure water channel 3221. Filter cloth 326 is used to filter the pure water output from pure water channel 3221 to remove large particles in the pure water.

[0118] See Figure 3 In one embodiment, the composite filter device further includes:

[0119] The outer tube 5 passes through the first filter module 2, that is, the outer tube 5 is located in the center hole of the first filter module 2 to improve the internal space utilization of the first filter module 2 and facilitate further reduction of the overall volume of the composite filter device. The outer peripheral wall of the outer tube 5 and the inner peripheral wall of the first filter module 31 form the second primary filtered water outlet channel 6. The second primary filtered water outlet channel 6 connects the first filter module 2 and the primary filtered water outlet 113 so that the primary filtered water formed after filtration by the first filter module 2 is transported to the primary filtered water outlet 113 through the second primary filtered water outlet channel 6.

[0120] The inner tube 7 passes through the outer tube 5, that is, the inner tube 7 is located in the center hole of the outer tube 5 to improve the utilization rate of the internal space of the outer tube 5 and avoid occupying too much internal space of the first filter module 2. The inner tube 7 has a pure water outlet channel 71, which connects the second filter module 3 and the pure water outlet 115 so that the pure water formed after filtration by the second filter module 3 is transported to the pure water outlet 115 through the pure water outlet channel 71. The outer peripheral wall of the inner tube 7 and the inner peripheral wall of the outer tube 5 form a wastewater outlet channel 8, which connects the second filter module 3 and the wastewater outlet 116 so that the wastewater generated by the second filter module 3 is transported to the wastewater outlet 116 through the wastewater outlet channel 8.

[0121] See Figure 4 In one embodiment, the inner peripheral wall of the outer tube 5 is provided with a plurality of isolation protrusions 51, the plurality of isolation protrusions 51 are arranged around the inner tube 7 at intervals, and the plurality of isolation protrusions 51 abut against the outer peripheral wall of the inner tube 7, so as to reliably install the inner tube 7 on the outer tube 5.

[0122] See Figure 3 The first axial end of the inner tube 7 is inserted into the outer shell 1, and a fifth sealing ring is sandwiched between the first axial end of the inner tube 7 and the outer shell 1 to seal the gap between the inner tube 7 and the outer shell 1 and prevent water leakage.

[0123] The second axial end of the inner tube 7 is inserted into the outer end cap 312. A sixth sealing ring is provided between the second axial end of the inner tube 7 and the outer end cap 312 to seal the gap between the inner tube 7 and the outer end cap 312. The first axial end of the pure water outlet channel 71 is connected to the pure water outlet 115, and the second axial end of the pure water outlet channel 71 is connected to the pure water channel 3221.

[0124] In one embodiment, the outer tube 5 and the second end cap 25 are integrally connected to improve the sealing between the outer tube 5 and the second end cap 25.

[0125] Specifically, the outer tube 5 and the second end cap 25 are integrally formed to further improve the seal between the outer tube 5 and the second end cap 25.

[0126] Of course, in other embodiments, the outer tube 5 and the second end cap 25 can also be integrally connected by a glue.

[0127] A preferred embodiment of this utility model provides a water purification device, including the aforementioned composite filter element device.

[0128] The water purification equipment of this utility model, by adopting the aforementioned composite filter element device, also uses a method where the first filter module 2 and the second filter module 3 are arranged sequentially along the length of the outer shell 1 within the outer shell 1. In other words, the first filter module 2 and the second filter module 3 are arranged in a stacked manner within the outer shell 1, thereby integrating the first filter module 2 and the second filter module 3 with different filtration functions into a single composite filter element device. This results in a simple structure and significantly reduces the overall volume of the composite filter element device, thus reducing the space occupied by the composite filter element device in the water purification equipment and consequently reducing the size of the water purification equipment. Furthermore, by integrating the first filter module 2 and the second filter module 3 with different filtration functions into a single composite filter element, filtration performance can be improved, the replacement frequency of the composite filter element can be reduced, and thus the operating cost can be lowered.

[0129] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0131] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A composite filter element device, characterized in that, include: The housing has an inner cavity, a raw water inlet, a primary filtered water outlet, a pure water outlet, and a wastewater outlet. The raw water inlet is used to connect with an external water supply device, and the primary filtered water outlet is connected to the primary filtered water inlet. A first filter module is disposed in the inner cavity and is connected to the raw water inlet and the primary filtered water outlet. The first filter module is used to filter the water output by the water supply device. as well as The second filter module is disposed within the inner cavity. The second filter module and the first filter module are arranged sequentially along the length of the outer shell. The outer wall of the second filter module, the outer wall of the first filter module, and the cavity wall of the inner cavity form a primary filtration water inlet channel. One end of the primary filtration water inlet channel is connected to the primary filtration water inlet, and the other end of the primary filtration water inlet channel is connected to the second filter module. The second filter module is connected to the pure water outlet and the wastewater outlet. The second filter module is used to filter the water output by the first filter module.

2. The composite filter element device according to claim 1, characterized in that, The first filter module includes: A filter barrel, the filter barrel having a cavity, a raw water inlet channel and a first pre-filtered water outlet channel, the raw water inlet channel being connected to the raw water inlet, and the first pre-filtered water outlet channel being connected to the pre-filtered water outlet; The first filter element is disposed in the cavity. The outer peripheral wall of the first filter element and the inner wall of the cavity form a raw water flow channel. The raw water flow channel is connected to the raw water inlet channel and the first filter element. The first filter element is used to filter the water output by the external water supply device. The second filter element is disposed inside the first filter element and is connected to the first filter element. The second filter element is used to filter the water filtered by the first filter element. A first end cap, located within the cavity, connects to the filter barrel. The first end cap is fitted onto the axial first end of the first filter element and the axial second end of the second filter element. The first end cap has a connecting hole that connects the second filter element to the first pre-filtered water outlet channel. The second end cap is located inside the cavity and is sleeved on the axial second end of the first filter element and the axial second end of the second filter element. The second end cap is connected to the filter barrel.

3. The composite filter element device according to claim 1, characterized in that, The second filter module includes: A first filter module, connected to the primary filtered water inlet channel and the wastewater outlet, is used to filter the water output from the first filter module; and The second filter group is located inside the first filter module and is connected to the first filter module and the pure water outlet. The second filter group is used to filter the water output by the first filter module.

4. The composite filter element device according to claim 3, characterized in that, The first filter module includes: The third filter element is connected to the primary filtered water inlet channel and the wastewater outlet. An outer end cap, which is sleeved on the axial first end of the third filter element, and connected to the first filter module; and A positioning ring is sleeved on the outer peripheral wall of the third filter element. The positioning ring is located on one end close to the second axial end of the third filter element, and the positioning ring is connected to the cavity wall of the inner cavity.

5. The composite filter element device according to claim 4, characterized in that, The second filter group includes: A first inner end cap, the first inner end cap being connected to the outer end cap; A support tube, the first axial end of which is connected to the first inner end cap, the support tube having a pure water flow channel, the pure water flow channel being connected to the pure water outlet; The second inner end cap is disposed at the second axial end of the support tube; The fourth filter element is sleeved on the outer peripheral wall of the support tube. The first axial end of the fourth filter element abuts against the first inner end cap, and the second axial end of the fourth filter element abuts against the second inner end cap. The fourth filter element connects the pure water flow channel and the third filter element.

6. The composite filter element device according to claim 5, characterized in that, The second filter group also includes: A protective tube is sleeved on the outer peripheral wall of the fourth filter element. One end of the protective tube is connected to the first inner end cap, and the other end of the protective tube is connected to the second inner end cap. The protective tube has a water passage hole that connects the third filter element and the fourth filter element.

7. The composite filter element device according to claim 6, characterized in that, One end of the protective tube is provided with a first snap-fit ​​part, and the other end of the protective tube is provided with a second snap-fit ​​part; The first inner end cover is provided with a third snap-fit ​​part, which cooperates with the first snap-fit ​​part to connect the first inner end cover and the protective tube together; The second inner end cover is provided with a fourth snap-fit ​​part, which cooperates with the second snap-fit ​​part to connect the second inner end cover and the protective tube together.

8. The composite filter element device according to claim 1, characterized in that, The composite filter element device also includes: An outer tube passes through the first filter module, and the outer peripheral wall of the outer tube and the inner peripheral wall of the first filter module form a second primary filtered water outlet channel, which connects the first filter module and the primary filtered water outlet. The inner tube passes through the outer tube and has a pure water outlet channel that connects the second filter module and the pure water outlet. The outer peripheral wall of the inner tube and the inner peripheral wall of the outer tube form a wastewater outlet channel that connects the second filter module and the wastewater outlet.

9. The composite filter element device according to claim 1, characterized in that, The outer casing includes: The shell body has the inner cavity. The first end of the shell body has the raw water inlet, the primary filtered water inlet, the primary filtered water outlet, the pure water outlet and the wastewater outlet. The second end of the shell body has an installation port for the first filter module and the second filter module to enter and exit the installation port. A cover, which is detachably disposed on the body of the housing, and which can cover the mounting opening; The first filter module and the shell body are detachably connected, the second filter module is connected to the first filter module, and the second filter module abuts against the shell cover.

10. A water purification device, characterized in that, The composite filter device according to any one of claims 1-9.

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