Composite filtering device and water purifying equipment

Abstract

The utility model provides a composite filtering device and water purifying equipment, and the composite filtering device comprises a front filtering module which is provided with a containing hole; the rear filtering module is communicated with the front filtering module, is used for filtering water output by the front filtering module and is provided with a pure water flow channel; the water outlet module is connected with the rear filtering module, is arranged in the accommodating hole and is provided with a pure water outlet flow channel, the first end of the pure water outlet flow channel is communicated with the pure water flow channel, and the second end of the pure water outlet flow channel is used for outputting pure water out of the composite filtering device. Due to the fact that the water outlet module is arranged in the containing hole of the front filtering module, the utilization rate of the internal unoccupied space of the front filtering module is increased, waste of the internal unoccupied space of the front filtering module is avoided, meanwhile, due to the fact that the pure water outlet flow channel is arranged on the water outlet module, the pure water outlet flow channel is separated from the rear filtering module, and therefore the water outlet efficiency is improved. The radial size of the rear filter module can be reduced, so that the overall size of the composite filter device can be reduced.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a composite filtration 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] Currently, some water purification equipment on the market uses composite filtration devices. These devices mainly consist of a pre-filter module and a post-filter module, arranged sequentially along the axial direction of the composite filtration device. The pre-filter module performs preliminary filtration of the raw water, while the post-filter module further filters the pre-filtered water to obtain pure water. However, because the outlet channel of the post-filter module is located within it, it occupies internal space, resulting in a larger radial dimension. Simultaneously, the pre-filter module has considerable internal space, leading to wasted internal space and consequently a larger overall size of the composite filtration device. Utility Model Content

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

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

[0006] A pre-filter module is used to connect to an external water supply device and to filter the water output from the external water supply device. The pre-filter module has a receiving hole.

[0007] A post-filter module, wherein the post-filter module and the pre-filter module are sequentially arranged along the axial direction of the composite filtration device, the post-filter module is connected to the pre-filter module, and the post-filter module is used to filter the water output from the pre-filter module. The post-filter module has a pure water flow channel; and

[0008] A water outlet module is connected to the post-filter module and is located in the receiving hole. The water outlet module has a pure water outlet channel. The first end of the pure water outlet channel is connected to the pure water channel, and the second end of the pure water outlet channel is used to output pure water to the outside of the composite filter device.

[0009] In one embodiment, the post-filter module further includes a wastewater flow channel;

[0010] The water outlet module also has a wastewater outlet channel, the first end of which is connected to the wastewater channel, and the second end of which is used to output wastewater to the outside of the composite filter device.

[0011] In one embodiment, the water outlet module includes:

[0012] An outer tube, wherein the outer tube is disposed in the receiving hole, the outer tube having a mounting cavity; and

[0013] An inner tube is disposed in the mounting cavity, the inner tube has the pure water outlet channel, and the outer side wall of the inner tube and the side wall of the mounting cavity form the wastewater outlet channel.

[0014] In one embodiment, the post-filter module includes:

[0015] A first filter assembly, the first filter assembly having the pure water flow channel; and

[0016] The second filter group is fitted onto the first filter group and is connected to the pre-filter module and the first filter group. The second filter group has the wastewater flow channel.

[0017] In one embodiment, the first filter group includes:

[0018] A first filter element having a through hole extending along the axial direction of the first filter element;

[0019] A support body is disposed in the through hole to support the first filter element, and the support body has the pure water flow channel, which is connected to the first filter element;

[0020] The first inner end cap is disposed on the first axial end of the support body, and the first inner end cap abuts against the first axial end of the first filter element.

[0021] A second inner end cap is disposed on the axial second end of the support body, and the second inner end cap abuts against the axial second end of the first filter element; and

[0022] A protective sleeve is fitted onto the outer peripheral wall of the first filter element. One end of the protective sleeve is connected to the first inner end cap, and the other end of the protective sleeve is connected to the second inner end cap. The protective sleeve has a water passage hole that connects the first filter element and the second filter assembly.

[0023] In one embodiment, the second filter group includes:

[0024] The second filter element is sleeved on the outer peripheral wall of the first filter group, and the second filter element is connected to the pre-filter module and the first filter group.

[0025] A first outer end cap is sleeved on the axial first end of the second filter element, and the first outer end cap and the axial first end of the second filter element form the wastewater flow channel. The first outer end cap is connected to the water outlet module.

[0026] The second outer end cap is sleeved on the axial second end of the second filter element.

[0027] In one embodiment, the composite filtration device further includes:

[0028] A filter bottle has an inner cavity, a front water inlet, a front water outlet, a rear water inlet, a rear water outlet, and a wastewater outlet. The front water inlet is used to connect to an external water supply device, the front water outlet is connected to the rear water inlet, the rear water outlet is connected to the pure water outlet channel, and the wastewater outlet is connected to the wastewater outlet channel.

[0029] The pre-filter module is located inside the inner cavity. The pre-filter module also has a raw water inlet channel and a primary filtered water outlet channel. The raw water inlet channel is connected to the pre-filter inlet, and the primary filtered water outlet channel is connected to the pre-filter outlet.

[0030] The post-filter module is disposed in the inner cavity. The post-filter module also has a primary filtered water inlet. The post-filter module, the pre-filter module and the inner cavity form a primary filtered water inlet channel. One end of the primary filtered water inlet channel is connected to the post-filter inlet, and the other end of the primary filtered water inlet channel is connected to the primary filtered water inlet.

[0031] In one embodiment, the pre-filter module includes:

[0032] The housing has a front cavity, a raw water inlet channel, and a primary filtered water outlet channel. The raw water inlet channel is used to connect with an external water supply device, and the primary filtered water outlet channel is connected to the post-filter module.

[0033] The third filter element is disposed in the front cavity. The third filter element has the receiving hole. A primary filtration water channel is formed between the side wall of the receiving hole and the outer peripheral wall of the water outlet module. The primary filtration water channel connects the third filter element and the primary filtration water outlet channel.

[0034] The fourth filter element is sleeved on the outer peripheral wall of the third filter element. A raw water flow channel is formed between the outer side wall of the fourth filter element and the side wall of the front cavity. The raw water flow channel connects the raw water inlet channel and the fourth filter element.

[0035] In one embodiment, the pre-filter module further includes:

[0036] The first end cap is sleeved on the axial first end of the third filter element and the axial first end of the fourth filter element. The first end cap is provided with a positioning sleeve, which is disposed in the receiving hole. The positioning sleeve is arranged around the water outlet module. The positioning sleeve abuts against the outer peripheral wall of the water outlet module, and the inner peripheral wall of the positioning sleeve and the outer peripheral wall of the water outlet module form the primary filtered water flow channel.

[0037] The second end cap is sleeved on the second axial end of the third filter element and the second axial end of the fourth filter element. The second end cap has a clearance hole through which the water outlet module passes.

[0038] In one embodiment, the second end cap is provided with a first snap-fit ​​protrusion, which abuts against the side wall of the front cavity to restrict the movement of the third filter element and the fourth filter element.

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

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

[0041] This utility model discloses a composite filtration device, comprising a pre-filtration module, a post-filtration module, and a water outlet module. The pre-filtration module is connected to an external water supply device, allowing water from the external water supply device to be delivered to the pre-filtration module for filtration. The post-filtration module is connected to the pre-filtration module, allowing water from the pre-filtration module to be delivered to the post-filtration module for filtration to produce pure water. The pure water is output to a pure water channel. The water outlet module has a pure water outlet channel, with its first end connected to the pure water channel and its second end used to discharge the pure water. The pure water in the pure water channel is output to the outside of the composite filtration device for drinking. Since the outlet module is located in the receiving hole of the pre-filter module, the utilization rate of the internal space of the pre-filter module is improved, and the waste of the internal space of the pre-filter module is avoided. At the same time, since a pure water outlet channel is set on the outlet module, the pure water outlet channel is separated from the post-filter module, which can reduce the radial dimension of the post-filter module, thereby reducing the overall volume of the composite filtration device.

[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 filtration device of this utility model;

[0045] Figure 2 This is a bottom view of the composite filtration device of this utility model;

[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 pre-filter module in this utility model from a first-view perspective, wherein the water outlet module is installed on the pre-filter module.

[0048] Figure 5 This is a three-dimensional structural diagram of the pre-filter module in this utility model from a second perspective, wherein the water outlet module is installed on the pre-filter module.

[0049] Figure 6 for Figure 5 A cross-sectional view along the BB direction in the middle;

[0050] Figure 7 for Figure 5 A cross-sectional view along the BB direction in the middle;

[0051] Figure 8 This is a three-dimensional structural diagram of the post-filter module in this utility model;

[0052] Figure 9 This is a cross-sectional view of the post-filter module in this utility model;

[0053] Figure 10 This is a three-dimensional structural diagram of the first filter group in this utility model;

[0054] Figure 11 This is an exploded view of the first filter group in this utility model;

[0055] Figure 12 This is an assembly diagram of the second end cap and the outer tube in this utility model;

[0056] Figure 13 This is a cross-sectional view of the second end cap and the outer tube in this utility model.

[0057] Figure Labels

[0058] 1. Pre-filter module; 11. Housing; 111. Pre-filter cavity; 112. Raw water inlet channel; 113. Primary filtered water outlet channel; 12. Third filter element; 121. Receiving hole; 13. Fourth filter element; 14. Raw water channel; 15. First end cap; 151. Positioning sleeve; 16. Second end cap; 161. Clearance hole; 162. First snap-fit ​​protrusion; 17. Primary filtered water channel; 2. Post-filter module; 21. First filter group; 211. First filter element; 2111. Through hole; 212. Support body; 2121. Pure water channel; 213. First inner end cap; 2131. First snap-fit ​​part; 214. Second inner end cap; 2141. Second snap-fit ​​part; 215. 1. Protective sleeve; 2151. Water passage hole; 2152. Third snap-fit ​​part; 2153. Fourth snap-fit ​​part; 22. Second filter group; 221. Second filter element; 222. First outer end cap; 223. Wastewater channel; 224. Second outer end cap; 2241. Primary filter water inlet; 2242. Second snap-fit ​​protrusion; 3. Water outlet module; 31. Outer pipe; 311. Mounting cavity; 312. Connecting port; 313. First isolation protrusion; 32. Inner pipe; 321. Pure water outlet channel; 33. Wastewater outlet channel; 4. Filter bottle; 41. Inner cavity; 42. Front water inlet; 43. Front water outlet; 44. Rear water inlet; 45. Rear water outlet; 46. Wastewater outlet. Detailed Implementation

[0059] 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.

[0060] See Figures 1-13 This invention illustrates a preferred embodiment of a composite filtration device, comprising:

[0061] The pre-filter module 1 is used to connect with an external water supply device and to filter the water output by the external water supply device. The pre-filter module 1 has a receiving hole 121.

[0062] A post-filter module 2 and a pre-filter module 1 are sequentially arranged along the axial direction of the composite filtration device. The post-filter module 2 is connected to the pre-filter module 1 and is used to filter the water output from the pre-filter module 1. The post-filter module 2 has a pure water flow channel 2121, which is located at the center of the post-filter module 2 and extends along the axial direction of the post-filter module 2, that is, it extends along the axial direction of the composite filtration device.

[0063] Water outlet module 3 is connected to the post-filter module 2. Water outlet module 3 is located in the receiving hole 121. Water outlet module 3 has a pure water outlet channel 321. The first end of the pure water outlet channel 321 is connected to the pure water channel 2121. The second end of the pure water outlet channel 321 is used to output pure water to the outside of the composite filter device.

[0064] This utility model discloses a composite filtration device, comprising a pre-filtration module 1, a post-filtration module 2, and a water outlet module 3. The pre-filtration module 1 is connected to an external water supply device, allowing water from the external water supply device to be delivered to the pre-filtration module 1 for filtration. The post-filtration module 2 is connected to the pre-filtration module 1, allowing water from the pre-filtration module 1 to be delivered to the post-filtration module 2 for filtration to produce pure water. The pure water is output to a pure water channel 2121. The water outlet module 3 has a pure water outlet channel 321, with its first end connected to the pure water channel 2121 and its second end used for... Pure water is output to the outside of the composite filtration device, allowing the pure water in the pure water channel 2121 to be output to the outside of the composite filtration device through the pure water outlet channel 321 for drinking. Since the outlet module 3 is located in the receiving hole 121 of the pre-filter module 1, the utilization rate of the internal space of the pre-filter module 1 is improved, and the waste of the internal space of the pre-filter module 1 is avoided. At the same time, since the pure water outlet channel 321 is set on the outlet module 3, the pure water outlet channel 321 is separated from the post-filter module 2, which can reduce the radial dimension of the post-filter module 2, thereby reducing the overall volume of the composite filtration device.

[0065] In one embodiment, the receiving hole 121 is located at the center of the pre-filter module 1 and extends along the axial direction of the pre-filter module 1, that is, the receiving hole 121 extends along the axial direction of the composite filter device, so as to improve the axial space utilization of the pre-filter module 1 and avoid occupying the radial space of the pre-filter module 1.

[0066] See Figure 3 In one embodiment, the post-filter module 2 also has a wastewater flow channel 223;

[0067] The water outlet module 3 also has a wastewater outlet channel 33. The first end of the wastewater outlet channel 33 is connected to the wastewater channel 223, and the second end of the wastewater outlet channel 33 is used to output wastewater to the outside of the composite filtration device. The wastewater generated by the post-filtration module 2 is transported to the outside of the composite filtration device through the wastewater outlet channel 33 to achieve wastewater discharge. Since the wastewater outlet channel 33 is set on the water outlet module 3, the internal space utilization rate of the water outlet module 3 is improved. At the same time, the wastewater outlet channel 33 is separated from the post-filtration module 2, which can further reduce the radial dimension of the post-filtration module 2, thereby further reducing the overall volume of the composite filtration device.

[0068] See Figure 3 In one embodiment, the pure water outlet channel 321 is located at the center of the outlet module 3, and the wastewater outlet channel 33 is arranged around the pure water outlet channel 321. In this way, both the pure water outlet channel 321 and the wastewater outlet channel 33 can have a sufficiently large cross-sectional area to improve the pure water outlet efficiency and the wastewater outlet efficiency. At the same time, it improves the utilization rate of the internal space of the outlet module 3, which is conducive to reducing the radial dimension of the outlet module 3, so that the outlet module 3 can be adapted to the size of the receiving hole 121 in the pre-filter module 1.

[0069] See Figure 3 , Figures 6-13 In one embodiment, the water outlet module 3 includes:

[0070] The outer tube 31 is disposed in the receiving hole 121 and has a mounting cavity 311; and

[0071] The inner tube 32 is located in the mounting cavity 311. The inner tube 32 has a pure water outlet channel 321. The outer wall of the inner tube 32 and the side wall of the mounting cavity 311 form a wastewater outlet channel 33, which effectively isolates the pure water outlet channel 321 and the wastewater outlet channel 33, prevents pure water and wastewater from flowing together, improves the purity of pure water, and also improves the efficiency of pure water preparation.

[0072] See Figure 13 In one embodiment, the outer tube 31 is provided with a plurality of first isolation protrusions 313, which are all located in the mounting cavity 311. The plurality of first isolation protrusions 313 are arranged at intervals around the axial center line of the outer tube 31, and the plurality of first isolation protrusions 313 abut against the outer peripheral wall of the inner tube 32 to form a wastewater outlet channel 33. At the same time, the inner tube 32 is fixed so that the inner tube 32 can be reliably installed on the outer tube 31.

[0073] Of course, in other embodiments, the outer tube 31 and the inner tube 32 can be made in one piece, that is, the water outlet module 3 is a one-piece structure.

[0074] See Figure 3 , Figures 8-13 In one embodiment, the post-filter module 2 includes:

[0075] First filter assembly 21, first filter assembly 21 having a pure water flow channel 2121; and

[0076] The second filter group 22 is fitted onto the first filter group 21, meaning the first filter group 21 is located inside the second filter group 22. The second filter group 22 connects the pre-filter module 1 and the first filter group 21, and has a wastewater flow channel 223. Because the second filter group 22 connects the pre-filter module 1 and the first filter group 21, the water output from the pre-filter module 1 can be transported to the second filter group 22 for filtration, and then the water output from the second filter group 22 can be transported to the first filter group 21 for filtration to obtain pure water, thereby improving the purity of the pure water. In addition, since the second filter group 22 is fitted onto the first filter group 21, the first filter group 21 is located inside the second filter group 22, which improves the utilization rate of the internal space of the second filter group 22 and helps to further reduce the overall volume of the composite filtration device.

[0077] See Figures 8-13 In one embodiment, the first filter group 21 includes:

[0078] The first filter element 211 has a through hole 2111, which extends along the axial direction of the first filter element 211.

[0079] Support body 212 is provided in through hole 2111 to support first filter element 211. Support body 212 has pure water flow channel 2121, which is connected to first filter element 211.

[0080] The first inner end cap 213 is disposed on the first axial end of the support body 212, and the first inner end cap 213 abuts against the first axial end of the first filter element 211.

[0081] The second inner end cap 214 is disposed on the axial second end of the support 212, and the second inner end cap 214 abuts against the axial second end of the first filter element 211; and

[0082] A protective sleeve 215 is fitted onto the outer peripheral wall of the first filter element 211. One end of the protective sleeve 215 is connected to the first inner end cap 213, and the other end is connected to the second inner end cap 214. The protective sleeve 215 has a water passage hole 2151, which connects the first filter element 211 and the second filter assembly 22. By inserting the support body 212 into the through hole 2111 of the first filter element 211, the support body 212 can provide internal support for the first filter element 211. By placing the first inner end cap 213 on the axial first end of the support body 212, with the first inner end cap 213 abutting against the axial first end of the first filter element 211, and placing the second inner end cap 214 on the axial second end of the support body 212, with the second inner end cap 214 abutting against the axial second end of the first filter element 211, the first filter element 211 is axially limited, thereby achieving... The first filter element 211 is now fixed in place to ensure that it is reliably mounted on the support body 212, allowing the support body 212 to provide effective internal support for the first filter element 211. A protective sleeve 215 is fitted onto the outer peripheral wall of the first filter element 211, with its first end connected to the first inner end cap 213 and its second end connected to the second inner end cap 214. This utilizes the first and second inner end caps 213 and 214 respectively to support both ends of the protective sleeve 215, preventing the protective sleeve 215 from... The first filter element 211 is compressed, and the protective sleeve 215 can be used to externally support the first filter element 211. When the second filter assembly 22 needs to be installed on the outer peripheral wall of the protective sleeve 215, both the protective sleeve 215 and the support body 212 can share the pressure of the second filter assembly 22, so that the pressure of the second filter assembly 22 is not applied to the first filter element 211, or the pressure applied by the second filter assembly 22 to the first filter element 211 is reduced, which plays a dual protection role and enhances the protective effect of the first filter element 211. Compared with the existing technology that only provides internal or external support for the first filter element 211, the first filter element 211 in this first filter assembly 21 is less prone to damage, thus reducing the cost of the first filter assembly 21. In addition, the first filter assembly 21, composed of the first filter element 211, the support body 212, the first inner end cap 213, the second inner end cap 214 and the protective sleeve 215, is a modular structure, which can realize the standardized assembly of this first filter assembly 21, improve production efficiency, and further reduce the cost of the first filter assembly 21.

[0083] See Figures 10-11 In one embodiment, the first inner end cover 213 is provided with a first snap-fit ​​portion 2131;

[0084] The second inner end cover 214 is provided with a second snap-fit ​​portion 2141;

[0085] The first end of the protective sleeve 215 is provided with a third snap-fit ​​part 2152. The third snap-fit ​​part 2152 and the first snap-fit ​​part 2131 cooperate to connect the protective sleeve 215 and the first inner end cover 213 together, which can realize the tool-free connection between the protective sleeve 215 and the first inner end cover 213, making the connection operation simpler and more convenient, and improving the assembly efficiency.

[0086] The second end of the protective sleeve 215 is provided with a fourth snap-fit ​​part 2153. The fourth snap-fit ​​part 2153 cooperates with the second snap-fit ​​part 2141 to connect the protective sleeve 215 and the second inner end cover 214 together, which can realize the tool-free connection of the protective sleeve 215 and the second inner end cover 214, making the connection operation simpler and more convenient, and improving the assembly efficiency.

[0087] See Figures 10-11 In one embodiment, the first snap-fit ​​portion 2131 and the third snap-fit ​​portion 2152 are, respectively, a snap-fit ​​groove and a snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​groove to reliably connect the protective sleeve 215 and the first inner end cap 213 together.

[0088] In the second snap-fit ​​portion 2141 and the fourth snap-fit ​​portion 2153, one is a snap-fit ​​groove and the other is a snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​groove to reliably connect the protective sleeve 215 and the second inner end cover 214 together.

[0089] Of course, in other embodiments, the first end of the protective sleeve 215 can also be connected to the first inner end cap 213 by an adhesive, and the second end of the protective sleeve 215 can also be connected to the second inner end cap 214 by an adhesive.

[0090] Of course, in other embodiments, the first end of the protective sleeve 215 can also be connected to the first inner end cap 213 by fasteners (such as screws or rivets), and the second end of the protective sleeve 215 can also be connected to the second inner end cap 214 by fasteners (such as screws or rivets).

[0091] See Figure 10 In one embodiment, the protective sleeve 215 has a water passage hole 2151 on its side wall, which is connected to the first filter element 211 so that the water output from the second filter group 22 is delivered to the first filter element 211 through the water passage hole 2151.

[0092] In one embodiment, the first inner end cap 213 covers the axial first end of the first filter element 211 to seal the axial first end of the first filter element 211, preventing water in the first filter element 211 from passing through the axial first end of the first filter element 211, thereby directing the water in the first filter element 211 to ensure that the water in the first filter element 211 can only flow into the pure water channel 2121.

[0093] The second inner end cap 214 covers the axial second end of the first filter element 211 to seal the axial second end of the first filter element 211, preventing water in the first filter element 211 from passing through the axial second end of the first filter element 211, thereby directing the water in the first filter element 211 to ensure that the water in the first filter element 211 can only flow into the pure water channel 2121.

[0094] In one embodiment, the first inner end cap 213 and the support body 212 are integrally connected to improve the sealing performance of the first inner end cap 213 and the support body 212 and prevent water leakage.

[0095] In one embodiment, the first inner end cap 213 and the support body 212 are integrally formed to achieve an integral connection between the first inner end cap 213 and the support body 212. At the same time, the first inner end cap 213 and the support body 212 are connected without connection structure, and the sealing performance of the first inner end cap 213 and the support body 212 can be further improved.

[0096] In one embodiment, the first inner end cap 213 and the support body 212 are connected by an adhesive, which can also achieve an integral connection between the first inner end cap 213 and the support body 212.

[0097] See Figure 11 In one embodiment, the second inner end cap 214 has a connecting hole, and the hole wall of the connecting hole is provided with a first rotation limiting part;

[0098] The second axial end of the support body 212 is inserted into the connecting hole. The second axial end of the support body 212 is provided with a second rotation limiting part. The second rotation limiting part cooperates with the first rotation limiting part to restrict the rotation of the second inner end cover 214 relative to the support body 212, so that the second inner end cover 214 is reliably installed on the support body 212 and prevents the second inner end cover 214 from falling off the support body 212, thereby reliably installing the first filter element 211 on the support body 212.

[0099] See Figure 11 In one embodiment, both the first rotation limiting part and the second rotation limiting part can be planar parts.

[0100] See Figure 11 In one embodiment, when both the first rotation limiting part and the second rotation limiting part are planar parts, the cross-sections of both the axial second end of the support body 212 and the connecting hole are polygonal, so that the axial second end of the support body 212 is provided with a plurality of second rotation limiting parts and the connecting hole is provided with a plurality of first rotation limiting parts, each of the first rotation limiting parts cooperating with the corresponding second rotation limiting part to improve the connection stability between the second inner end cap 214 and the support body 212.

[0101] Of course, in other embodiments, one of the first rotation limiting part and the second rotation limiting part can be a groove and the other can be a protrusion. The protrusion and the groove are adapted to each other and can also limit the rotation of the second inner end cover 214 relative to the support body 212.

[0102] See Figures 8-9 In one embodiment, the second filter group 22 includes:

[0103] The second filter element 221 is sleeved on the outer peripheral wall of the first filter group 21. The second filter element 221 connects the pre-filter module 1 and the first filter group 21, so as to filter the water output by the pre-filter module 1 using the second filter element 221, and at the same time, to transport the water filtered by the second filter element 221 to the first filter group 21.

[0104] A first outer end cap 222 is sleeved on the axial first end of the second filter element 221. The first outer end cap 222 and the axial first end of the second filter element 221 form a wastewater flow channel 223. The first outer end cap 222 is connected to the water outlet module 3, thereby connecting the water outlet module 3 and the second filter group 22 together. This allows the water outlet module 3 to connect the pre-filter module 1 and the post-filter module 2 together, forming a structurally stable composite filtration device.

[0105] The second outer end cap 224 is sleeved on the axial second end of the second filter element 221. By encapsulating the second filter element 221 with the first outer end cap 222 and the second outer end cap 224, the second filter element 221 can be reliably installed on the first filter group 21, thereby forming a structurally stable post-filter module 2, which facilitates the assembly of the post-filter module 2.

[0106] In one embodiment, the second outer end cap 224 has a primary water inlet 2241, which connects the second filter element 221 and the pre-filter module 1, so that the water output from the pre-filter module 1 is transported to the second filter element 221 through the primary water inlet 2241.

[0107] The outer peripheral wall of the second filter element 221 is provided with an adhesive layer (not shown in the figure). The adhesive layer is arranged around the axial center line of the second filter element 221. The adhesive layer connects the first outer end cap 222 and the second outer end cap 224, thereby connecting the second filter element 221, the first outer end cap 222, and the second outer end cap 224 together, thereby improving the structural stability of the second filter group 22. At the same time, the adhesive layer seals the outer peripheral wall of the second filter element 221, restricting external water from entering the second filter element 221 through the outer peripheral wall of the second filter element 221. At the same time, it restricts the water inside the second filter element 221 from passing through its outer peripheral wall, thereby achieving the orientation of the water inside the second filter element 221.

[0108] In one embodiment, the first filter element 211 is a carbon rod filter element, and the second filter element 221 is an RO membrane filter element. The RO membrane filter element is used to filter the water output from the pre-filter module 1, while the carbon rod filter element enhances the taste of the pure water filtered by the RO membrane filter element.

[0109] Of course, in other embodiments, the first filter element 211 and the second filter element 221 can also be other different types of filter elements.

[0110] See Figures 1-3 In one embodiment, the composite filtration device further includes:

[0111] The filter bottle 4 has an inner cavity 41, a pre-inlet 42, a pre-outlet 43, a post-inlet 44, a post-outlet 45, and a wastewater outlet 46. The pre-inlet 42 is used to connect with an external water supply device. The pre-outlet 43 is connected to the post-inlet 44 so that the water output from the pre-filter module 1 is transported to the post-inlet 44 through the pre-outlet 43. The post-outlet 45 is connected to the pure water outlet channel 321 so that the pure water output from the post-filter module 2 is transported to the post-outlet 45 through the pure water outlet channel 321 for drinking. The wastewater outlet 46 is connected to the wastewater outlet channel 33 so that the wastewater output from the post-filter module 2 is transported to the wastewater outlet 46 through the wastewater outlet channel 33 to achieve wastewater discharge.

[0112] The pre-filter module 1 is located inside the inner cavity 41. The pre-filter module 1 also has a raw water inlet channel 112 and a primary filtered water outlet channel 113. The raw water inlet channel 112 is connected to the pre-filter inlet 42 so that the water output from the external water supply device is transported to the raw water inlet channel 112 through the pre-filter inlet 42. The primary filtered water outlet channel 113 is connected to the pre-filter outlet 43 so that the water output from the pre-filter module 1 is transported to the pre-filter outlet 43 through the primary filtered water outlet channel 113.

[0113] The post-filter module 2 is located inside the inner cavity 41. The post-filter module 2 also has a primary water inlet 2241. The post-filter module 2, the pre-filter module 1, and the inner cavity 41 form a primary water inlet channel. One end of the primary water inlet channel is connected to the post-filter inlet 44 so that the water output from the pre-filter module 1 is transported to the primary water inlet channel through the post-filter inlet 44. The other end of the primary water inlet channel is connected to the primary water inlet 2241 so that the water in the primary water inlet channel is transported to the post-filter module 2 through the primary water inlet 2241. The post-filter module 2 filters the water output from the pre-filter module 1 to obtain pure water. At the same time, wastewater is generated.

[0114] For easy installation of the composite filtration device, please refer to [link / reference]. Figure 2In one embodiment, the pre-inlet 42, the pre-outlet 43, the post-inlet 44, the post-outlet 45, and the wastewater outlet 46 are all located at the same end of the filter bottle 4.

[0115] In one embodiment, the second outer end cap 224 is provided with a plurality of second snap-fit ​​protrusions 2242, which are arranged around the axial center line of the second outer end cap 224. The plurality of second snap-fit ​​protrusions 2242 abut against the side wall of the inner cavity 41 to reliably install the post-filter module 2 in the filter bottle 4 and prevent the post-filter module 2 from moving in the filter bottle 4. At the same time, since the pre-filter module 1 is connected to the post-filter module 2 through the water outlet module 3, the movement of the pre-filter module 1 in the filter bottle 4 can also be restricted.

[0116] In one embodiment, the outer tube 31 and the first outer end cap 222 are integrally connected to improve the sealing performance of the outer tube 31 and the first outer end cap 222 and prevent water leakage.

[0117] The outer peripheral wall of the outer pipe 31 has a connecting port 312, which connects the wastewater flow channel 223 and the wastewater outlet flow channel 33, so that the wastewater generated by the second filter group 22 can be transported to the wastewater outlet flow channel 33 through the connecting port 312.

[0118] See Figures 3-7 In one embodiment, the pre-filter module 1 includes:

[0119] The housing 11 has a front cavity 111, a raw water inlet channel 112, and a primary filtered water outlet channel 113. The raw water inlet channel 112 is used to connect with an external water supply device so that the water output from the external water supply device can be delivered to the raw water inlet channel 112. The primary filtered water outlet channel 113 is connected to the post-filter module 2 so that the primary filtered water output from the pre-filter module 1 can be delivered to the post-filter module 2.

[0120] The third filter element 12 is disposed in the front cavity 111. The third filter element 12 has a receiving hole 121. A primary filtration channel 17 is formed between the side wall of the receiving hole 121 and the outer peripheral wall of the water outlet module 3. The primary filtration channel 17 connects the third filter element 12 and the primary filtration outlet channel 113 so that the primary filtration water output by the third filter element 12 is transported to the primary filtration outlet channel 113 through the primary filtration channel 17.

[0121] The fourth filter element 13 is fitted onto the outer peripheral wall of the third filter element 12, meaning the third filter element 12 is located inside the fourth filter element 13. The fourth filter element 13 is connected to the third filter element 12, allowing water output from the fourth filter element 13 to be transported to the third filter element 12. A raw water channel 14 is formed between the outer wall of the fourth filter element 13 and the side wall of the pre-filter chamber 111. The raw water channel 14 connects the raw water inlet channel 112 and the fourth filter element 13, allowing water in the raw water inlet channel 112 to be transported to the fourth filter element 13 through the raw water channel 14. This means that water output from the external water supply device can be transported to the fourth filter element 13. Thus, the fourth filter element 13 can be used to filter the water output from the external water supply device, and then the third filter element 12 can be used to filter the water. Filtering the water output from the fourth filter element 13 improves the purity of the water output from the pre-filter module 1. Simultaneously, since the raw water channel 14 is located between the outer wall of the fourth filter element 13 and the side wall of the pre-filter chamber 111, and the primary filtered water channel 17 is located between the side wall of the receiving hole 121 of the third filter element 12 and the outer peripheral wall of the outlet module 3, the raw water channel 14 and the primary filtered water channel 17 are effectively isolated, preventing unfiltered water and filtered water from flowing together, thereby improving the purity of the filtered water. Furthermore, the pre-filter module 1, composed of the housing 11, the third filter element 12, and the fourth filter element 13, has a modular structure, facilitating the installation of the pre-filter module 1 inside the filter bottle 4 and improving the installation efficiency of the pre-filter module 1.

[0122] In one embodiment, the third filter element 12 is a carbon rod filter element, and the fourth filter element 13 is a PP cotton filter element. The PP cotton filter element is used to filter large particulate matter in the water, while the carbon rod filter element is used to purify the water output from the PP cotton filter element. This can effectively improve the purity of the water output from the pre-filter module, and at the same time, it can effectively prevent the carbon rod filter element from clogging and extend the service life of the pre-filter module.

[0123] See Figures 3-7 In one embodiment, the pre-filter module 1 further includes:

[0124] The first end cap 15 is sleeved on the axial first end of the third filter element 12 and the axial first end of the fourth filter element 13 to seal the axial first end of the third filter element 12 and the axial first end of the fourth filter element 13 to prevent water leakage. The first end cap 15 is provided with a positioning sleeve 151, which is located in the receiving hole 121. The positioning sleeve 151 is arranged around the water outlet module 3. The positioning sleeve 151 abuts against the outer peripheral wall of the water outlet module 3, and the inner peripheral wall of the positioning sleeve 151 and the outer peripheral wall of the water outlet module 3 form the primary filtration water flow channel 17.

[0125] The second end cap 16 is fitted onto the axial second ends of the third filter element 12 and the fourth filter element 13 to seal the axial second ends of the third filter element 12 and the fourth filter element 13, preventing water leakage. The second end cap 16 has a clearance hole 161 through which the water outlet module 3 passes. Since the first end cap 15 is provided with a positioning sleeve 151, which cooperates with the receiving hole 121, the third filter element 12 can be positioned for installation, facilitating the quick installation of the third filter element 12 onto the first outer end cap 222. At the same time, it improves the connection stability between the third filter element 12 and the first outer end cap 222. In addition, since the positioning sleeve 151 abuts against the outer peripheral wall of the water outlet module 3, the water outlet module 3 is fixed on the positioning sleeve 151, thus connecting the water outlet module 3 and the pre-filter module 1 together.

[0126] In one embodiment, the inner sidewall of the positioning sleeve 151 is provided with a plurality of second isolation protrusions, which are arranged at intervals around the water outlet module 3. The plurality of second isolation protrusions abut against the outer peripheral wall of the water outlet module 3 to separate the positioning sleeve 151 and the water outlet module 3, thereby forming the aforementioned primary filtration water channel 17.

[0127] In one embodiment, the second end cap 16 is provided with a first snap-fit ​​protrusion 162, which abuts against the side wall of the front cavity 111 to restrict the movement of the third filter element 12 and the fourth filter element 13, so that the third filter element 12 and the fourth filter element 13 are reliably installed in the housing 11.

[0128] A preferred embodiment of this utility model provides a water purification device, including the aforementioned composite filtration device.

[0129] The water purification equipment of this utility model adopts the above-mentioned composite filtration device. Also, since the water outlet module 3 is located in the receiving hole 121 of the pre-filter module 1, the utilization rate of the internal space of the pre-filter module 1 is improved, and the waste of the internal space of the pre-filter module 1 is avoided. At the same time, since a pure water outlet channel 321 is set on the water outlet module 3, the pure water outlet channel 321 is separated from the post-filter module 2, which can reduce the radial dimension of the post-filter module 2, thereby reducing the overall volume of the composite filtration device and thus reducing the overall volume of the water purification equipment.

[0130] 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.

[0131] 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.

[0132] 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 filtration device, characterized in that, include: A pre-filter module is used to filter water output from an external water supply device, and the pre-filter module has receiving holes. A post-filter module and a pre-filter module are arranged sequentially along the axial direction of the composite filter device. The post-filter module is connected to the pre-filter module and is used to filter the water output by the pre-filter module. The post-filter module has a pure water flow channel. as well as A water outlet module is provided in the receiving hole. The water outlet module has a pure water outlet channel. The first end of the pure water outlet channel is connected to the pure water channel, and the second end of the pure water outlet channel is used to output pure water to the outside of the composite filter device.

2. The composite filtration device according to claim 1, characterized in that, The post-filter module also has a wastewater flow channel; The water outlet module also has a wastewater outlet channel, the first end of which is connected to the wastewater channel, and the second end of which is used to output wastewater to the outside of the composite filter device.

3. The composite filtration device according to claim 2, characterized in that, The water outlet module includes: An outer tube, wherein the outer tube is disposed in the receiving hole, the outer tube having a mounting cavity; and An inner tube is disposed in the mounting cavity, the inner tube has the pure water outlet channel, and the outer side wall of the inner tube and the side wall of the mounting cavity form the wastewater outlet channel.

4. The composite filtration device according to claim 2, characterized in that, The post-filter module includes: A first filter assembly, the first filter assembly having the pure water flow channel; and The second filter group is fitted onto the first filter group and is connected to the pre-filter module and the first filter group. The second filter group has the wastewater flow channel.

5. The composite filtration device according to claim 4, characterized in that, The first filter group includes: A first filter element having a through hole extending along the axial direction of the first filter element; A support body is disposed in the through hole to support the first filter element, and the support body has the pure water flow channel, which is connected to the first filter element; The first inner end cap is disposed on the first axial end of the support body, and the first inner end cap abuts against the first axial end of the first filter element. A second inner end cap is disposed on the axial second end of the support body, and the second inner end cap abuts against the axial second end of the first filter element; and A protective sleeve is fitted onto the outer peripheral wall of the first filter element. One end of the protective sleeve is connected to the first inner end cap, and the other end of the protective sleeve is connected to the second inner end cap. The protective sleeve has a water passage hole that connects the first filter element and the second filter assembly.

6. The composite filtration device according to claim 4, characterized in that, The second filter group includes: The second filter element is sleeved on the outer peripheral wall of the first filter group, and the second filter element is connected to the pre-filter module and the first filter group. A first outer end cap is sleeved on the axial first end of the second filter element, and the first outer end cap and the axial first end of the second filter element form the wastewater flow channel. The first outer end cap is connected to the water outlet module. The second outer end cap is sleeved on the axial second end of the second filter element.

7. The composite filtration device according to claim 2, characterized in that, The composite filtration device also includes: A filter bottle has an inner cavity, a front water inlet, a front water outlet, a rear water inlet, a rear water outlet, and a wastewater outlet. The front water inlet is used to connect to an external water supply device, the front water outlet is connected to the rear water inlet, the rear water outlet is connected to the pure water outlet channel, and the wastewater outlet is connected to the wastewater outlet channel. The pre-filter module is located inside the inner cavity. The pre-filter module also has a raw water inlet channel and a primary filtered water outlet channel. The raw water inlet channel is connected to the pre-filter inlet, and the primary filtered water outlet channel is connected to the pre-filter outlet. The post-filter module is disposed in the inner cavity. The post-filter module also has a primary filtered water inlet. The post-filter module, the pre-filter module and the inner cavity form a primary filtered water inlet channel. One end of the primary filtered water inlet channel is connected to the post-filter inlet, and the other end of the primary filtered water inlet channel is connected to the primary filtered water inlet.

8. The composite filtration device according to claim 1, characterized in that, The pre-filter module includes: The housing has a front cavity, a raw water inlet channel, and a primary filtered water outlet channel. The raw water inlet channel is used to connect with an external water supply device, and the primary filtered water outlet channel is connected to the post-filter module. The third filter element is disposed in the front cavity. The third filter element has the receiving hole. A primary filtration water channel is formed between the side wall of the receiving hole and the outer peripheral wall of the water outlet module. The primary filtration water channel connects the third filter element and the primary filtration water outlet channel. The fourth filter element is sleeved on the outer peripheral wall of the third filter element and is connected to the third filter element. A raw water flow channel is formed between the outer side wall of the fourth filter element and the side wall of the front cavity, and the raw water flow channel is connected to the raw water inlet flow channel and the fourth filter element.

9. The composite filtration device according to claim 8, characterized in that, The pre-filter module also includes: The first end cap is sleeved on the axial first end of the third filter element and the axial first end of the fourth filter element. The first end cap is provided with a positioning sleeve, which is disposed in the receiving hole. The positioning sleeve is arranged around the water outlet module. The positioning sleeve abuts against the outer peripheral wall of the water outlet module, and the inner peripheral wall of the positioning sleeve and the outer peripheral wall of the water outlet module form the primary filtered water flow channel. The second end cap is sleeved on the second axial end of the third filter element and the second axial end of the fourth filter element. The second end cap has a clearance hole through which the water outlet module passes.

10. A water purification device, characterized in that, The composite filtration device includes any one of claims 1-9.

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