Front filtering device and water purifying equipment

Abstract

The utility model provides a preposed filtering device and water purifying equipment, and the preposed filtering device comprises a shell which is provided with an inner cavity, a water inlet and a water outlet; the first filter element is arranged in the inner cavity and is provided with a first purified water outlet flow channel, and the first purified water outlet flow channel is communicated with the water outlet; the second filter element is arranged on the peripheral wall of the first filter element in a sleeving manner; the first end cover sleeves the first axial end of the first filter element and the first axial end of the second filter element; the axial second end of the first filter element and the axial second end of the second filter element are sleeved with the second end cover, a raw water inlet flow channel is formed by the second end cover, the peripheral wall of the second filter element and the side wall of the inner cavity, and the raw water inlet flow channel is communicated with the water inlet. According to the water purifier, streaming between the raw water inlet flow channel and the first purified water outlet flow channel can be effectively avoided, that is, raw water and purified water can be prevented from being mixed, and the purity of the purified water is improved.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a pre-filter 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 filter cartridges in water purification equipment use a PP cotton composite carbon rod filter cartridge structure. PP cotton is wrapped around the outer wall of the carbon rod filter cartridge, and both ends of the PP cotton are sealed with caps. This filter cartridge uses an outer PP cotton pre-filtration and an inner carbon rod filter cartridge structure, which can greatly reduce the operating cost of water purification filter cartridges and allow for efficient utilization of the carbon rod's filtration efficiency. However, due to its structure, the above-mentioned filter cartridges still have the problem of easy cross-flow between raw water and purified water, affecting the purity of the purified water. Utility Model Content

[0004] This application provides a pre-filtration device and a water purification equipment to solve the problem of easy cross-flow between raw water and purified water in related technologies. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a pre-filtering device, including:

[0006] A housing having an inner cavity, an inlet, and an outlet, wherein the inlet is used to communicate with an external water supply device;

[0007] A first filter element is disposed within the inner cavity. The first filter element has a first purified water outlet channel that extends along the axial direction of the first filter element and is connected to the water outlet.

[0008] The second filter element is sleeved on the outer peripheral wall of the first filter element and is connected to the first filter element.

[0009] A first end cap, which is sleeved on the axial first end of the first filter element and the axial first end of the second filter element; and

[0010] The second end cap 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, the outer peripheral wall of the second filter element and the side wall of the inner cavity form a raw water inlet channel, which is connected to the water inlet.

[0011] In one embodiment, the second end cap has a positioning part inserted into the first purified water outlet channel, and the positioning part has a second purified water outlet channel that connects the first purified water outlet channel and the water outlet.

[0012] In one embodiment, the housing includes:

[0013] The housing has a first end with the water inlet and the water outlet, and a second end with a mounting port for the first filter element, the second filter element, the first end cap, and the second end cap to enter and exit the housing; and

[0014] A cover is provided on the second end of the shell body and closes the mounting opening. The cover and the shell body form the inner cavity.

[0015] In one embodiment, the first end of the shell has a third purified water outlet channel, the third purified water outlet channel comprising:

[0016] A first purified water outlet section is located between the shell and the second end cap, extending axially along the shell, with one end connected to the first purified water outlet channel; and

[0017] The second purified water outlet section extends radially along the shell body and connects the other end of the first purified water outlet section with the water outlet, which is located on the side of the first end of the shell body.

[0018] In one embodiment, the raw water inlet channel includes:

[0019] The first raw water inlet section is located between the side wall of the inner cavity and the second end cap. The first raw water inlet section extends along the axial direction of the shell body. One end of the first raw water inlet section is connected to the water inlet, which is located at the end of the first end of the shell body.

[0020] A second raw water inlet section is located between the side wall of the inner cavity and the second end cap. The second raw water inlet section extends radially along the shell, and one end of the second raw water inlet section connects to the other end of the first raw water inlet section.

[0021] The third raw water inlet section is located between the side wall of the inner cavity, the side wall of the second end cap, and the outer peripheral wall of the second filter element. The third raw water inlet section extends along the axial direction of the pre-filter device and is connected to the other end of the second raw water inlet section.

[0022] In one embodiment, the housing further includes:

[0023] The inner core passes through the first end of the shell, the second end cap, the first purified water outlet channel, and the first end cap, and the inner core is used to provide radial support for the first end cap and the second end cap.

[0024] In one embodiment, the first end cap has a first positioning protrusion at its axial first end, the first positioning protrusion is inserted into the first purified water outlet channel, and the first positioning protrusion is sleeved on the outer peripheral wall of the inner core.

[0025] In one embodiment, the second end of the first end cap is provided with a second positioning protrusion, which is sleeved on the outer peripheral wall of the inner core.

[0026] The cover has a positioning hole for the second positioning protrusion to be inserted.

[0027] And / or, the inner core has a first connecting groove, which is exposed at one end of the housing away from the water inlet and the water outlet, and the first connecting groove is used to cooperate with the post-filter device.

[0028] Secondly, embodiments of this application provide a water purification device, including the aforementioned pre-filter.

[0029] The advantages or beneficial effects of the above technical solutions include at least the following:

[0030] This utility model's pre-filtration device improves the utilization rate of the internal space of the second filter element by fitting the second filter element onto the outer peripheral wall of the first filter element, avoiding excessive occupation of the axial space of the housing and thus significantly reducing the overall volume of the pre-filtration device. Furthermore, the first filter element, the second filter element, the first end cap, and the second end cap form a modular composite filter element structure, facilitating the installation of these components into the inner cavity. Additionally, by forming a raw water inlet channel between the outer peripheral wall of the second end cap and the second filter element and the side wall of the inner cavity, and by forming a first purified water outlet channel on the first filter element, the raw water inlet channel connects to the inlet, allowing raw water output from an external water supply device to be delivered to the raw water inlet channel. The raw water then passes radially through the second filter element and the first filter element in sequence along the pre-filter device to filter and purify the raw water to obtain purified water. The purified water is then transported to the first purified water outlet channel, and the purified water in the first purified water outlet channel is transported out of the pre-filter device through the outlet for use. In this process, by forming a raw water inlet channel between the second end cap, the outer peripheral wall of the second filter element, and the side wall of the inner cavity, and forming a first purified water outlet channel on the first filter element, the raw water inlet channel and the first purified water outlet channel are effectively isolated. This effectively prevents cross-flow between the raw water inlet channel and the first purified water outlet channel, that is, it prevents the raw water and purified water from mixing, thereby improving the purity of the purified water.

[0031] 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

[0032] 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.

[0033] Figure 1 This is a three-dimensional structural diagram of the pre-filter device of this utility model from a first-view perspective.

[0034] Figure 2 This is a three-dimensional structural diagram of the pre-filter device of this utility model from a second perspective.

[0035] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0036] Figure 4 for Figure 2A cross-sectional view along the BB direction in the middle;

[0037] Figure 5 This is a three-dimensional structural diagram of the shell of this utility model;

[0038] Figure 6 for Figure 5 The shell in the middle is a cross-sectional view from a first-person perspective;

[0039] Figure 7 for Figure 5 The shell in the middle is a cross-sectional view from a second perspective;

[0040] Figure 8 This is a three-dimensional structural diagram of the first cover body in this utility model from a first perspective.

[0041] Figure 9 This is a three-dimensional structural diagram of the first cover body in this utility model from a second perspective.

[0042] Figure 10 This is a three-dimensional structural diagram of the second cover body in this utility model from a first perspective.

[0043] Figure 11 This is a three-dimensional structural diagram of the second cover in this utility model from a second perspective.

[0044] Figure Labels

[0045] 1. Shell; 11. Shell body; 111. Inner cavity; 112. Water inlet; 113. Water outlet; 114. Third purified water outlet channel; 1141. First purified water outlet section; 1142. Second purified water outlet section; 115. Second connecting groove; 116. Third connecting groove; 117. Second isolation protrusion; 118. Connecting protrusion; 12. Shell cover; 121. Second connecting groove; 122. Positioning hole; 13. Inner core; 131. Inner cylinder; 1311. First purified water outlet channel; 132. Outer cylinder; 1321. First connecting groove; 133. Wastewater outlet channel; 2. First filter element; 2 1. First purified water outlet channel; 3. Second filter element; 4. First end cap; 41. Third connecting groove; 42. First positioning protrusion; 43. Second positioning protrusion; 44. Snap-fit ​​protrusion; 5. Second end cap; 51. Positioning part; 511. Second purified water outlet channel; 512. First isolation protrusion; 513. Third isolation protrusion; 52. Connecting part; 53. First connecting groove; 6. Raw water inlet channel; 61. First raw water inlet section; 62. Second raw water inlet section; 63. Third raw water inlet section; 7. Third sealing element; 8. Second sealing element; 9. First sealing element; 10. Fourth sealing element. Detailed Implementation

[0046] 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.

[0047] See Figures 1-11 This invention illustrates a preferred embodiment of a pre-filter device, comprising:

[0048] The housing 1 has an inner cavity 111, an inlet 112 and an outlet 113. The inlet 112 is used to communicate with an external water supply device (not shown in the figure).

[0049] The first filter element 2 is disposed in the inner cavity 111. The center of the first filter element 2 has a first purified water outlet channel 21, which extends along the axial direction of the first filter element 2 and is connected to the water outlet 113.

[0050] The second filter element 3 is sleeved on the outer peripheral wall of the first filter element 2 and is connected to the first filter element 2.

[0051] The first end cap 4 is sleeved on the axial first end of the first filter element 2 and the axial first end of the second filter element 3 to seal the axial first ends of the first filter element 2 and the second filter element 3; and

[0052] The second end cap 5 is sleeved on the axial second end of the first filter element 2 and the axial second end of the second filter element 3 to seal the axial second end of the first filter element 2 and the axial second end of the second filter element 3. The second end cap 5, the outer peripheral wall of the second filter element 3 and the side wall of the inner cavity 111 form the raw water inlet channel 6, which is connected to the water inlet 112.

[0053] The pre-filter device of this utility model improves the utilization rate of the internal space of the second filter element 3 by sleeved on the outer peripheral wall of the first filter element 2, which can avoid excessive occupation of the axial space of the housing 1, thereby greatly reducing the overall volume of the pre-filter device. In addition, the first filter element 2, the second filter element 3, the first end cap 4 and the second end cap 5 form a modular composite filter element structure, which facilitates the installation of the first filter element 2, the second filter element 3, the first end cap 4 and the second end cap 5 into the inner cavity 111. Furthermore, by forming a raw water inlet channel 6 between the outer peripheral wall of the second end cap 5 and the second filter element 3 and the side wall of the inner cavity 111, and forming a first purified water outlet channel 21 on the first filter element 2, the raw water inlet channel 6 is connected to the inlet 112, so that the raw water output from the external water supply device can be transported to the raw water inlet channel 6. The raw water then passes through the second filter element 3 and the first filter element 2 in sequence along the radial direction of the pre-filter device, so as to filter and purify the raw water in sequence by the second filter element 3 and the first filter element 2 to obtain purified water. The purified water is transported to the first purified water outlet channel 21, and the purified water in the first purified water outlet channel 21 is transported to the outside of the pre-filter device through the outlet 113 for use. In this way, by forming the raw water inlet channel 6 between the second end cover 5, the outer peripheral wall of the second filter element 3 and the side wall of the inner cavity 111, and forming the first purified water outlet channel 21 on the first filter element 2, the raw water inlet channel 6 and the first purified water outlet channel 21 are effectively isolated, which can effectively prevent crossflow between the raw water inlet channel 6 and the first purified water outlet channel 21, that is, it can prevent the raw water and purified water from mixing, thus improving the purity of the purified water.

[0054] In one embodiment, the first filter element 2 can be a carbon rod filter element, and the second filter element 3 can be PP cotton. The PP cotton is used to perform preliminary filtration of the raw water, and then the carbon rod filter element is used to perform deep filtration of the water output from the PP cotton. The combination of the two can effectively prevent the carbon rod filter element from clogging, extend the service life of the carbon rod filter element, reduce the cost of use, and at the same time, effectively improve the purity of the purified water.

[0055] In one embodiment, the aforementioned carbon rod filter element can specifically be a scale-inhibiting carbon rod filter element, which can inhibit scale formation, effectively prevent clogging of the carbon rod filter element, extend the service life of the carbon rod filter element, reduce the cost of use, and at the same time, effectively improve the purity of purified water.

[0056] See Figure 3In one embodiment, the second end cap 5 has a positioning part 51, which is inserted into the first purified water outlet channel 21. The positioning part 51 also has a second purified water outlet channel 511, which connects the first purified water outlet channel 21 and the outlet 113. Thus, the positioning part 51 and the first purified water outlet channel 21 can be used to position the first filter element 2, improving the connection stability between the second end cap 5 and the first filter element 2. Furthermore, the positioning part 51 forms the second purified water outlet channel 511, which guides the purified water output from the first purified water outlet channel 21, allowing the purified water to be delivered more smoothly to the outlet 113.

[0057] See Figure 10 In one embodiment, the outer peripheral wall of the positioning part 51 is provided with a plurality of first isolation protrusions 512. The first isolation protrusions 512 extend along the axial direction of the positioning part 51. The plurality of first isolation protrusions 512 are arranged at intervals around the axial center line of the positioning part 51. The plurality of first isolation protrusions 512 abut against the side wall of the first purified water outlet channel 21, that is, the plurality of first isolation protrusions 512 abut against the inner wall of the first filter element 2, so that the purified water filtered by the first filter element 2 can be output to the first purified water outlet channel 21, thereby improving the water production efficiency.

[0058] See Figure 10 In one embodiment, the second end cap 5 has a first connecting groove 53, which is disposed around the positioning part 51. The first connecting groove 53 is adapted to the second end of the second filter element 3 to close the axial second end of the first filter element 2 and the axial second end of the second filter element 3, while increasing the contact area between the second end cap 5 and the second filter element 3, which is beneficial to further improve the connection stability of the second end cap 5 and the second filter element 3.

[0059] In one embodiment, the bottom wall of the first connecting groove 53 and the axial second end of the first filter element 2 and the axial second end of the second filter element 3 are bonded together with adhesive, and the side wall of the first connecting groove 53 and the axial second end side wall of the second filter element 3 are bonded together with adhesive to reliably seal the axial second end of the first filter element 2 and the axial second end of the second filter element 3. At the same time, the second end cap 5 is more firmly connected to the first filter element 2 and the second filter element 3.

[0060] See Figures 3-4 as well as Figures 6-7 In one embodiment, the housing 1 includes:

[0061] The shell 11 has an inlet 112 and an outlet 113 at its first end, and a mounting port at its second end for the composite filter element structure formed by the first filter element 2, the second filter element 3, the first end cap 4, and the second end cap 5 to enter and exit the shell 11; and

[0062] The cover 12 is placed over the second end of the body 11 and closes the mounting opening. The cover 12 and the body 11 form an inner cavity 111. Thus, after assembling the first filter element 2, the second filter element 3, the first end cap 4, and the second end cap 5 to form a modular composite filter element structure, the composite filter element structure is then installed into the body 11, and finally the cover 12 is sealed to complete the assembly. The assembly operation is convenient and efficient.

[0063] See Figure 4 as well as Figure 7 In one embodiment, the first end of the shell 11 has a third purified water outlet channel 114, the third purified water outlet channel 114 comprising:

[0064] The first purified water outlet section 1141 is located between the shell 11 and the second end cap 5. The first purified water outlet section 1141 extends along the axial direction of the shell 11, which is also the axial direction. Figure 4 As shown in the vertical direction, one end of the first purified water outlet section 1141 is connected to the first purified water outlet channel 21. It can be understood that the first purified water outlet section 1141 is connected to the first purified water outlet channel 21 via the second purified water outlet channel 511; and

[0065] The second purified water outlet section 1142 extends radially along the shell 11, which is also known as the second purified water outlet section 1142. Figure 4 As shown in the left-right direction, the second purified water outlet section 1142 connects the other end of the first purified water outlet section 1141 and the outlet 113, with the outlet 113 located on the side of the first end of the shell 11. The third purified water outlet channel 114, composed of the first purified water outlet section 1141 and the second purified water outlet section 1142, has an L-shaped structure. This facilitates the connection between the outlet 113 and the first purified water outlet channel 21, while also increasing the resistance of purified water at the outlet 113 flowing back to the first purified water outlet channel 21 through the third purified water outlet channel 114, ensuring that purified water can be more smoothly discharged from the third purified water outlet channel 114 to the outlet 113.

[0066] See Figure 6 In one embodiment, the second end of the shell 11 is provided with a connecting protrusion 118, which is arranged around the axial center line of the shell 11.

[0067] The cover 12 has a second connecting groove 121, which is adapted to the connecting protrusion 118 to enable the cover 12 to be installed and positioned, so as to facilitate the quick connection of the cover 12 and the body 11 together.

[0068] In one embodiment, the inner wall of the second connecting groove 121 and the outer wall of the connecting protrusion 118 are bonded together with adhesive to reliably connect the cover 12 and the body 11 together.

[0069] See Figure 3 In one embodiment, the raw water inlet channel 6 includes:

[0070] The first raw water inlet section 61 is located between the side wall of the inner cavity 111 and the second end cap 5. The first raw water inlet section 61 extends along the axial direction of the shell 11, which is also the axial direction. Figure 3 In the vertical direction shown, one end of the first raw water inlet section 61 is connected to the inlet 112, and the inlet 112 is located at the end of the first end of the shell 11.

[0071] The second raw water inlet section 62 is located between the side wall of the inner cavity 111 and the second end cap 5. The second raw water inlet section 62 extends radially along the shell 11, which is also the radial direction. Figure 3 As shown in the left-right direction, one end of the second raw water inlet section 62 is connected to the other end of the first raw water inlet section 61; and

[0072] The third raw water inlet section 63 is located between the side wall of the inner cavity 111, the side wall of the second end cover 5, and the outer peripheral wall of the second filter element 3. The third raw water inlet section 63 extends axially along the pre-filter device and connects to the other end of the second raw water inlet section 62. The raw water inlet channel 6, composed of the first raw water inlet section 61, the second raw water inlet section 62, and the third raw water inlet section 63, is winding and tortuous, which can increase the resistance of the raw water at the third raw water inlet section 63 flowing back to the inlet 112 through the second raw water inlet section 62 and the first raw water inlet section 61, ensuring that the raw water can be delivered to the second filter element 3 more smoothly through the raw water inlet channel 6.

[0073] See Figure 6 In one embodiment, the shell 11 is provided with a plurality of second isolation protrusions 117, which are disposed in the inner cavity 111. The plurality of second isolation protrusions 117 are arranged at intervals around the axial center line of the shell 11, and the plurality of second isolation protrusions 117 abut against the end of the second end cap 5 to form the aforementioned second raw water inlet section 62.

[0074] See Figures 3-4 as well as Figures 6-7 In one embodiment, the housing 1 further includes:

[0075] The inner core 13 passes through the first end of the shell 11, the second end cover 5, the first clean water outlet channel 21 and the first end cover 4. The inner core 13 is used to provide radial support for the first end cover 4 and the second end cover 5 to improve the assembly stability of the first end cover 4 and the second end cover 5.

[0076] See Figure 11 In one embodiment, the sidewall of the third purified water outlet channel 114 is provided with a plurality of third isolation protrusions 513. The plurality of third isolation protrusions 513 are arranged around the axial center line of the third purified water outlet channel 114. The plurality of third isolation protrusions 513 abut against the outer peripheral wall of the inner core 13 so that the purified water output from the first purified water outlet channel 21 can be transported to the outlet 113 through the third purified water outlet channel 114. At the same time, it plays the role of fixing the inner core 13 and improving the assembly stability of the inner core 13.

[0077] join Figure 9 In one embodiment, the first end cap 4 has a third connecting groove 41, which is adapted to the first end of the second filter element 3 to seal the axial first end of the first filter element 2 and the axial second end of the second filter element 3. At the same time, it increases the contact area between the first end cap 4 and the second filter element 3, thereby improving the connection stability between the first end cap 4 and the second filter element 3.

[0078] In one embodiment, the bottom wall of the third connecting groove 41 and the axial first end of the first filter element 2 and the axial first end of the second filter element 3 are bonded together with adhesive, and the side wall of the third connecting groove 41 and the axial first end side wall of the second filter element 3 are bonded together with adhesive to reliably seal the axial first end of the first filter element 2 and the axial first end of the second filter element 3. At the same time, the connection between the first end cap 4 and the first filter element 2 and the second filter element 3 is made more secure.

[0079] See Figure 9 In one embodiment, the first end cap 4 has a first positioning protrusion 42 at its first axial end. The first positioning protrusion 42 is inserted into the first purified water outlet channel 21 and is sleeved on the outer peripheral wall of the inner core 13 to play the role of installation positioning. This facilitates the quick and correct installation of the first end cap 4 and also improves the assembly stability of the first end cap 4, making the connection between the first end cap 4 and the first filter element 2 more secure.

[0080] See Figure 4 In one embodiment, a first sealing member 9 is sandwiched between the inner wall of the first positioning protrusion 42 and the outer peripheral wall of the inner core 13. The first sealing member 9 is arranged around the axial center line of the inner core 13 to seal the gap between the inner wall of the first positioning protrusion 42 and the outer peripheral wall of the inner core 13 to prevent water leakage.

[0081] See Figure 4 , Figure 6 and Figure 8 In one embodiment, the second axial end of the first end cap 4 is provided with a second positioning protrusion 43, which is sleeved on the outer peripheral wall of the inner core 13.

[0082] The cover 12 has a positioning hole 122, which is used for the second positioning protrusion 43 to be inserted to position the cover 12 and facilitate the quick and correct installation of the cover 12.

[0083] See Figure 4 In one embodiment, a second sealing member 8 is sandwiched between the outer peripheral wall of the second positioning protrusion 43 and the hole wall of the positioning hole 122. The second sealing member 8 is arranged around the axial center line of the second positioning protrusion 43 to seal the gap between the outer peripheral wall of the second positioning protrusion 43 and the hole wall of the positioning hole 122 to prevent water leakage.

[0084] See Figure 4 and Figure 8 In one embodiment, the first end cap 4 is provided with a plurality of snap-fit ​​protrusions 44, which are arranged around the axial center line of the first end cap 4. The plurality of snap-fit ​​protrusions 44 are sandwiched between the side wall of the inner cavity 111 and the outer peripheral wall of the second filter element 3, so as to reliably install the composite filter element structure composed of the first end cap 4, the first filter element 2, the second filter element 3 and the second end cap 5 in the inner cavity 111 and prevent the composite filter element structure from moving in the inner cavity 111.

[0085] See Figure 7 In one embodiment, the inner core 13 has a first connecting groove 1321. The first connecting groove 1321 is exposed at one end of the housing 1 away from the inlet 112 and the outlet 113. The first connecting groove 1321 is used to cooperate with the post-filter device to facilitate connecting the pre-filter device and the post-filter device together.

[0086] To improve the space utilization of the inner core 13, see Figures 3-4 as well as Figures 6-7 In one embodiment, the inner core 13 includes:

[0087] The inner cylinder 131 has a first pure water outlet channel 1311, which is used to communicate with the second pure water outlet channel of the post-filter, so that the pure water output from the second pure water outlet channel can be output to the outside of the pre-filter through the first pure water outlet channel 1311; and

[0088] The outer cylinder 132 is sleeved on the outer peripheral wall of the inner cylinder 131. A first wastewater outlet channel 133 is formed between the inner peripheral wall of the outer cylinder 132 and the outer peripheral wall of the inner cylinder 131. The first wastewater outlet channel 133 is used to communicate with the second wastewater outlet channel 133 of the post-filter, so that the wastewater output from the second wastewater outlet channel 133 can be output to the outside of the pre-filter through the first wastewater outlet channel 133.

[0089] See Figure 3 In one embodiment, a third seal 7 is provided between the outer peripheral wall of the inner core 13 and the shell 11. The third seal 7 is disposed around the inner core 13 to seal the gap between the outer peripheral wall of the inner core 13 and the shell 11 to prevent water leakage.

[0090] See Figure 3 and Figure 11 In one embodiment, the first end of the shell 11 also has a second connecting groove 115, which communicates with the inner cavity 111 and is arranged around the axial center line of the shell 11.

[0091] The second end cap 5 is provided with a connecting part 52, which is inserted into the second connecting groove 115. A fourth sealing element 10 is provided between the inner wall of the connecting part 52 and the side wall of the second connecting groove 115. The fourth sealing element 10 seals the gap between the connecting part 52 and the first connecting groove 1321 to prevent water leakage.

[0092] See Figure 3 and Figure 7 In one embodiment, the first end of the housing 11 also has a third connecting groove 116, which is used to engage with the filter bottle to install the pre-filter device inside the filter bottle.

[0093] It is understood that the first sealing element 9, the second sealing element 8, the third sealing element 7, and the fourth sealing element 10 can all be sealing rings or sealing tapes.

[0094] This utility model also provides a water purification device, which includes the aforementioned pre-filter.

[0095] The water purification device of this utility model, by adopting the aforementioned pre-filtration device, also forms a raw water inlet channel 6 between the outer peripheral wall of the second end cover 5 and the second filter element 3 and the side wall of the inner cavity 111, and a first purified water outlet channel 21 on the first filter element 2. This achieves effective isolation between the raw water inlet channel 6 and the first purified water outlet channel 21, effectively preventing crossflow between the raw water inlet channel 6 and the first purified water outlet channel 21, that is, preventing the mixing of raw water and purified water, and improving the purity of the purified water.

[0096] 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.

[0097] 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.

[0098] 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 pre-filter device, characterized in that, include: A housing having an inner cavity, an inlet, and an outlet, wherein the inlet is used to communicate with an external water supply device; A first filter element is disposed within the inner cavity and has a first purified water outlet channel connected to the water outlet. The second filter element is sleeved on the outer peripheral wall of the first filter element and is connected to the first filter element. A first end cap, which is sleeved on the axial first end of the first filter element and the axial first end of the second filter element; and The second end cap 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, the outer peripheral wall of the second filter element and the side wall of the inner cavity form a raw water inlet channel, which is connected to the water inlet.

2. The pre-filter device according to claim 1, characterized in that, The second end cap has a positioning part, which is inserted into the first purified water outlet channel. The positioning part has a second purified water outlet channel, which connects the first purified water outlet channel and the water outlet.

3. The pre-filter device according to claim 1, characterized in that, The housing includes: The housing has a first end with the water inlet and the water outlet, and a second end with a mounting port for the first filter element, the second filter element, the first end cap, and the second end cap to enter and exit the housing; and A cover is provided on the second end of the shell body and closes the mounting opening. The cover and the shell body form the inner cavity.

4. The pre-filter device according to claim 3, characterized in that, The first end of the shell has a third purified water outlet channel, the third purified water outlet channel comprising: A first purified water outlet section is located between the shell and the second end cap, extending axially along the shell, with one end connected to the first purified water outlet channel; and The second purified water outlet section extends radially along the shell body and connects the other end of the first purified water outlet section with the water outlet, which is located on the side of the first end of the shell body.

5. The pre-filter device according to claim 3, characterized in that, The raw water inlet channel includes: The first raw water inlet section is located between the side wall of the inner cavity and the second end cap. The first raw water inlet section extends along the axial direction of the shell body. One end of the first raw water inlet section is connected to the water inlet, which is located at the end of the first end of the shell body. A second raw water inlet section is located between the side wall of the inner cavity and the second end cap. The second raw water inlet section extends radially along the shell, and one end of the second raw water inlet section connects to the other end of the first raw water inlet section. The third raw water inlet section is located between the side wall of the inner cavity, the side wall of the second end cap, and the outer peripheral wall of the second filter element. The third raw water inlet section extends along the axial direction of the pre-filter device and is connected to the other end of the second raw water inlet section.

6. The pre-filter device according to claim 3, characterized in that, The housing also includes: The inner core passes through the first end of the shell, the second end cap, the first purified water outlet channel, and the first end cap, and the inner core is used to provide radial support for the first end cap and the second end cap.

7. The pre-filter device according to claim 6, characterized in that, The first end cap has a first positioning protrusion at its first axial end. The first positioning protrusion is inserted into the first purified water outlet channel and is sleeved on the outer peripheral wall of the inner core.

8. The pre-filter device according to claim 6, characterized in that, The first end cap has a second positioning protrusion at its axial second end, and the second positioning protrusion is sleeved on the outer peripheral wall of the inner core; The cover has a positioning hole for the second positioning protrusion to be inserted.

9. The pre-filter device according to claim 7, characterized in that, The first end cap is provided with a plurality of snap-fit ​​protrusions, which are arranged around the axial center line of the first end cap and are sandwiched between the side wall of the inner cavity and the outer peripheral wall of the second filter element. And / or, the inner core has a first connecting groove, which is exposed at one end of the housing away from the water inlet and the water outlet, and the first connecting groove is used to cooperate with the post-filter device.

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

Images