Filtering device, water purification system and control method thereof

Abstract

The invention discloses a filtering device, a water purification system and a control method of the water purification system, and relates to the technical field of water treatment.The filtering device comprises a first water inlet and a first water outlet; a cavity is formed in the shell, a mineral substance releasing unit, a first filtering unit and water capable of containing a preset volume are arranged in the cavity, the cavity internally comprises a first area used for diluting mineral substances released by the mineral substance releasing unit and a second area located outside the first area, and the mineral substance releasing unit is arranged in the first area; the second area can accommodate part of water with a preset volume and is provided with a first filtering unit; the first water inlet is communicated with the first water outlet through the mineral substance release unit and the second area. The problem that the mineral concentration in the mineral water is too high when the water purification system outputs the mineral water again after the water purification system is placed for a long time and does not output the mineral water can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to a filtering device, a water purification system and a control method thereof. Background Art

[0002] As people's living standards improve, users have higher and higher requirements for water purification systems. Many users require that water purification systems can not only supply purified water, but also mineral water to meet the needs of users for at least two different types of water.

[0003] Water purification systems generally rely on mineral release units to generate mineral water, that is, when water flows through the mineral release unit, the minerals in the mineral release unit are released into the water, thereby forming mineral water. When the water purification system is down for a long time, if the user needs mineral water later, the first cup of mineral water received by the user will have a high mineral concentration. For example, the maximum concentration of strontium may exceed the standard too much. Although many regions do not have mandatory standards for the upper limit of mineral water concentration, general healthy drinking recommendations have upper limits, such as the upper limit of strontium is 4ppm, so the existing water purification systems that can supply mineral water still need further improvement. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a filtering device, a water purification system and a control method thereof, which can solve the problem of excessively high mineral concentration in mineral water when the water purification system outputs mineral water again after not outputting mineral water for a long time.

[0005] The specific technical solution of the embodiment of the present invention is:

[0006] A filtering device, comprising:

[0007] a first water inlet and a first water outlet;

[0008] A shell, wherein a cavity is formed in the shell, wherein a mineral release unit, a first filter unit, and water capable of accommodating a preset volume are arranged in the cavity, wherein the cavity comprises a first area for diluting the minerals released by the mineral release unit and a second area outside the first area, wherein the mineral release unit is arranged in the first area, and the second area capable of accommodating a part of the preset volume of water and the first filter unit is arranged;

[0009] The first water inlet is communicated with the first water outlet through the mineral releasing unit and the second area.

[0010] Preferably, the volume of the cavity occupied by the mineral release unit does not exceed half of the volume of the cavity.

[0011] Preferably, the water is able to penetrate into the mineral release element.

[0012] Preferably, water contained in the second region can penetrate into the first filter unit.

[0013] Preferably, the first water inlet and the first water outlet are located on the housing; along the direction of water flow from the first water inlet to the first water outlet, the mineral release unit is located upstream of the first filter unit.

[0014] Preferably, the mineral releasing unit is arranged near the first water inlet.

[0015] Preferably, the water outlet of the first filter unit is in communication with the first water outlet;

[0016] The mineral release unit comprises: a shell; mineral release particles arranged in the shell, the inlet of the shell is communicated with the first water inlet, and the outlet of the shell is communicated with the water inlet of the first filter unit;

[0017] or,

[0018] The mineral releasing unit comprises a mineral releasing material compressed into a block shape, a water inlet of the mineral releasing material is communicated with the first water inlet, and a water outlet of the mineral releasing member is communicated with an inlet of the first filter unit.

[0019] Preferably, the first region forms a first chamber, and the second region forms a second chamber;

[0020] The first chamber is communicated with the second chamber; or, under a preset state, the first chamber is communicated with the second chamber.

[0021] Preferably, the housing includes a first housing and a second housing, the first chamber is formed in the first housing, and the second chamber is formed in the second housing.

[0022] Preferably, the first filter unit comprises activated carbon.

[0023] Preferably, the filtering device further comprises: a fourth filtering unit disposed in the housing and used for filtering activated carbon, and the water filtered by the activated carbon is filtered by the fourth filtering unit and then flows to the first water outlet.

[0024] Preferably, the filtering device further comprises: a barrel unit disposed in the housing, wherein a third area independent of the first area and the second area is formed in the barrel unit;

[0025] A second filter unit disposed in the third area, the second filter unit comprising a pre-filter unit;

[0026] A second water inlet and a second water outlet, the water inlet of the second filter unit is communicated with the second water inlet, and the water outlet of the second filter unit is communicated with the second water outlet.

[0027] Preferably, the filtering device also includes: two support frames arranged between the outer wall of the barrel unit and the inner wall of the outer shell, the first area is formed between the two support frames, a plurality of flow holes are opened on the support frames, a first filter element is arranged between the support frame close to the first water inlet and the mineral release unit to prevent the mineral release unit from flowing toward the first water inlet; a second filter element is arranged between the support frame far from the first water inlet and the first filter unit to prevent the mineral release unit from flowing toward the first filter unit.

[0028] Preferably, the filtering device also includes: a central tube with a through hole arranged in the barrel unit, the pre-filter unit is sleeved outside the central tube, the central tube is connected with the second water outlet, the water inlet of the pre-filter unit is located at the outer wall, the water outlet of the pre-filter unit is located at the inner wall, and there is a gap between the outer wall of the pre-filter unit and the inner wall of the barrel unit that is connected with the second water inlet.

[0029] Preferably, the first area and the second area are formed between the outer wall of the cylinder and the inner wall of the shell.

[0030] Preferably, the first water inlet and the first water outlet are located at the same end of the housing;

[0031] The filtering device also includes: a partition mounted outside the cylinder, the partition separating the cylinder and the shell into a first flow channel and a second flow channel, the first flow channel and the second flow channel are connected at an end away from the first water inlet and the first water outlet, the first water inlet is connected to the first water outlet via the first flow channel and the second flow channel in sequence; the mineral release unit is arranged in the first flow channel or the second flow channel, and the first filtering unit is arranged in the first flow channel or the second flow channel.

[0032] Preferably, the mineral release unit and the first filter unit are arranged in the first flow channel;

[0033] The filtering device further comprises: a fourth filtering unit disposed between the cylinder and the housing for filtering activated carbon;

[0034] The fourth filtering unit comprises:

[0035] A bracket, wherein a flow passage extending in a radial direction is formed on the bracket, and the flow passage connects the first flow passage and the second flow passage;

[0036] A filter element for filtering activated carbon is arranged at the flow passage.

[0037] Preferably, the second shell is disposed in the first shell, and the first chamber is formed between the outer side wall of the second shell and the inner side wall of the first shell; the first chamber is connected to the second chamber through a connecting portion of the second shell.

[0038] Preferably, the first filter unit is in a carbon rod shape, the water inlet of the first filter unit is located at the outer wall of the first filter unit, there is a gap between the outer wall of the first filter unit and the inner wall of the second shell, and the gap between the outer wall of the first filter unit and the inner wall of the second shell is connected to the first chamber through the connecting portion;

[0039] The water outlet of the first filter unit is located at the inner side wall of the first filter unit, and the water outlet of the first filter unit is communicated with the first water outlet.

[0040] Preferably, the filtering device further comprises: a fourth filtering unit disposed at the connecting portion; the fourth filtering unit comprises:

[0041] A bracket, wherein a flow passage extending in a radial direction is formed on the bracket, wherein the flow passage communicates with the first chamber and a gap between an outer side wall of the first filter unit and an inner side wall of the second housing;

[0042] A filter element for filtering activated carbon is arranged at the flow passage.

[0043] Preferably, the mineral release unit comprises:

[0044] Mineral releasing materials;

[0045] A first limiting unit is located between the mineral releasing material and the first water inlet, so as to prevent the mineral releasing material from flowing toward the first water inlet.

[0046] Preferably, the filtering device further comprises:

[0047] Fine filtration unit;

[0048] a second filter unit, the second filter unit comprising a pre-filter unit, the fine filter unit and the second filter unit being located in the housing;

[0049] A wastewater outlet, the wastewater outlet end of the fine filtration unit is connected to the wastewater outlet;

[0050] The water flowing in from the first water inlet can be filtered through the second filter unit and the fine filter unit in sequence to obtain purified water, and the purified water can flow out from the first water outlet after passing through the mineral release unit and the first filter unit in sequence.

[0051] Preferably, the second filter unit is sleeved outside the fine filter unit.

[0052] The filtering device further comprises: a barrel unit, the fine filtering unit is sleeved outside the barrel unit, and the barrel unit has the first area and the second area;

[0053] The purified water outlet end of the fine filtering unit is connected to the first filtering unit through the connecting portion of the cylinder unit.

[0054] Preferably, the filtering device further comprises: a second water outlet, wherein the second water outlet is connected to the purified water outlet of the fine filtering unit.

[0055] Preferably, the filtering device includes: a partition arranged in the outer shell, the partition divides the cavity into the first area and the second area along the axial direction of the outer shell, the mineral release unit is tubular, and a tube body is inserted into the mineral release unit, and a water inlet channel connected to the first water inlet is formed between the tube body and the inner side wall of the mineral release unit; the first filter unit is tubular, the outer side wall of the mineral release unit is connected to the outer side wall of the first filter unit, and the inner side wall of the first filter unit is connected to the first water outlet through the inside of the tube body.

[0056] A water purification system, comprising:

[0057] Fine filtration unit;

[0058] A filtering device as described in any one of the above, wherein the first water inlet of the filtering device is connected to the purified water outlet of the fine filtering unit;

[0059] a first water outlet waterway, the first water outlet waterway being communicable with a first water outlet of the filtering device;

[0060] The second water outlet waterway is connectable to the purified water outlet end of the fine filtration unit.

[0061] Preferably, the water purification system has a first state and a second state, in which, in the first state, the second water outlet waterway is in a connected state with the purified water outlet end of the fine filtration unit, and the first water outlet waterway is in a disconnected state with the purified water outlet end of the fine filtration unit;

[0062] In the second state, the second water outlet waterway is disconnected from the purified water outlet end of the fine filtering unit, and the first water outlet waterway is connected to the purified water outlet end of the fine filtering unit.

[0063] Preferably, the water purification system has a third state, in which the second water outlet waterway is connected to the purified water outlet end of the fine filtration unit, and the first water outlet waterway is connected to the purified water outlet end of the fine filtration unit.

[0064] Preferably, the first water outlet waterway and the second water outlet waterway are connected to the same water outlet port.

[0065] Preferably, the water purification system further comprises:

[0066] The third filter unit, the water inlet of the third filter unit is connected with the purified water outlet of the fine filter unit, and the second water outlet waterway can be connected with the water outlet of the third filter unit; the third filter unit includes a post-filter unit.

[0067] Preferably, the third filter unit and the fine filter unit are integrated into one filter device.

[0068] Preferably, the water purification system further comprises: a second filter unit, the water outlet of the second filter unit being able to communicate with the raw water inlet of the fine filter unit; the second filter unit comprises a pre-filter unit;

[0069] The filtering device further comprises: a barrel unit disposed in the housing, wherein a third area independent of the first area and the second area is formed in the barrel unit; the second filtering unit is disposed in the third area;

[0070] A second water inlet and a second water outlet, the water inlet of the second filter unit is connected to the second water inlet, the water outlet of the second filter unit is connected to the second water outlet; the second water outlet is connected to the raw water inlet of the fine filter unit.

[0071] Preferably, the water purification system further comprises:

[0072] A second filter unit, wherein the water outlet of the second filter unit can be communicated with the raw water inlet of the fine filter unit; the second filter unit includes a pre-filter unit;

[0073] The first filter unit includes a post-filter unit, a water inlet of the first filter unit is communicated with a water outlet of the mineral release unit, and a water outlet of the first filter unit is communicated with the first water outlet waterway.

[0074] Preferably, the second filter unit, the fine filter unit, the mineral release unit, and the first filter unit are integrated into a same filter device.

[0075] A control method using any of the water purification systems described above, the control method comprising:

[0076] When it is necessary to output mineral water, determining whether the first preset condition is met;

[0077] If the first preset condition is met, the mineral water output from the first water outlet waterway and the purified water output from the second water outlet waterway are mixed and then output.

[0078] Preferably, the control method further includes:

[0079] If the first preset condition is not met, the mineral water outputted by the first water outlet waterway is outputted.

[0080] Preferably, the step of mixing the mineral water outputted from the first water outlet waterway with the purified water outputted from the second water outlet waterway and then outputting the mixed water comprises:

[0081] The first water outlet waterway is controlled to be connected to the second area, and the second water outlet waterway is controlled to be connected to the purified water outlet end of the fine filtration unit, so that the mineral water output by the first water outlet waterway is mixed with the purified water output by the second water outlet waterway.

[0082] Preferably, the step of outputting the mineral water outputted by the first water outlet waterway comprises:

[0083] The second water outlet waterway is controlled to be disconnected from the purified water outlet end of the fine filtering unit, and the first water outlet waterway is connected to the purified water outlet end of the fine filtering unit.

[0084] Preferably, the first preset condition includes at least one of the following: the interval between the current output of mineral water and the last output of mineral water exceeds the preset time, the concentration of mineral water at the mineral release unit exceeds the first preset concentration value, the concentration of mineral water output by the mineral release unit exceeds the second preset concentration value, and the concentration of mineral water output by the second area exceeds the third preset concentration value.

[0085] Preferably, the control method further includes:

[0086] When purified water needs to be output, the first water outlet waterway is controlled to be disconnected from the second area, and the second water outlet waterway is connected to the purified water outlet end of the fine filtration unit, so that the purified water output from the purified water outlet end of the fine filtration unit is output through the second water outlet waterway. The technical solution of the present invention has the following significant beneficial effects:

[0087] 1. When the filter device has not output mineral water for a long time, the water in the first area of ​​the filter device is in contact with the mineral release unit for a long time. At this time, the mineral release unit will continuously release minerals into the water. Since the second area can accommodate part of the preset volume of water, the minerals released into the water can diffuse into the water in the second area. In this way, the concentration of the mineral water in the first area can be diluted, reducing the degree of increase in the concentration of the mineral water in the cavity of the entire shell. When the filter device needs to output mineral water again, water enters the cavity of the shell from the first water inlet, and the mineral water with a slightly increased concentration in the cavity is directly output for the user to use. There will be no direct output of high-concentration mineral water. In this way, the problem of too high mineral concentration in the mineral water when the filter device outputs mineral water again after not outputting mineral water for a long time can be solved, so that the mineral concentration in the mineral water is stable within a certain reasonable range when the filter device outputs mineral water again after not outputting mineral water for a long time, which meets the general healthy drinking recommendation requirements.

[0088] 2. In addition, the second area in the filter device can not only accommodate part of the preset volume of water, but also be provided with a first filter unit. The water can also be filtered by the first filter unit before flowing out of the first water outlet. In this way, the filter device can be compounded with a filter unit. In this way, the filter unit itself can be used to accommodate part of the preset volume of water, thereby optimizing the structure of the water purification system and reducing the volume of the overall water purification system.

[0089] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0091] Figure 1 This is a schematic diagram of a filtering device in a first embodiment of the present invention;

[0092] Figure 2 This is a schematic diagram of a filtering device in a second embodiment of the present invention;

[0093] Figure 3 This is a schematic diagram of a filtering device in a third embodiment of the present invention;

[0094] Figure 4 This is a schematic diagram of a filter device in a fourth embodiment of the present invention;

[0095] Figure 5 This is a schematic diagram of a filtering device in a fifth embodiment of the present invention;

[0096] Figure 6 This is a schematic structural diagram of a filter device in a sixth implementation mode in an embodiment of the present invention;

[0097] Figure 7 This is a schematic structural diagram of a filter device in a seventh implementation manner in an embodiment of the present invention;

[0098] Figure 8 This is a schematic structural diagram of a filtering device in an eighth implementation manner in an embodiment of the present invention;

[0099] Fig. 9 This is a schematic diagram of the structure of the support frame in the filter device according to an embodiment of the present invention;

[0100] Fig.10 This is a schematic diagram of a water purification system in a first implementation mode in an embodiment of the present invention;

[0101] Fig.11 Schematic diagram of a water purification system in a second embodiment of the present invention.

[0102] Reference numerals in the above drawings:

[0103] 1. First water inlet; 2. First water outlet; 3. Shell; 31. First shell; 32. Second shell; 4. Mineral release unit; 41. Shell; 42. Mineral release particles; 5. First filter unit; 6. Cavity; 61. First area; 62. Second area; 7. Fourth filter unit; 8. Cylinder unit; 9. Second filter unit; 10. Second water inlet; 11. Second water outlet; 12. Support frame; 121. Flow hole; 122. Seal; 13. First filter element; 14. Second filter element; 15. Center tube; 16. Partition element; 17. First flow channel ; 18. Second flow channel; 19. Fine filtration unit; 20. Wastewater outlet; 21. Connecting part; 22. Water inlet flow channel; 23. Tube body; 100. Filter device; 200. First water outlet waterway; 2001. Second one-way valve; 300. Second water outlet waterway; 400. Water outlet port; 500. Third filtration unit; 600. Water inlet valve; 700. Pressurizing device; 800. Reflux waterway; 8001. First one-way valve; 900. Connecting waterway; 9001. On-off valve; 1000. Wastewater discharge waterway; 10001. Multi-function valve; 1100. Third one-way valve. DETAILED DESCRIPTION

[0104] The details of the present invention can be more clearly understood by combining the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on another element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the communication between the two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0105] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0106] In order to solve the problem of excessively high mineral concentration in mineral water when a water purification system outputs mineral water again after not outputting mineral water for a long time, a filtering device 100 is proposed in the present application. Figure 1 This is a schematic diagram of a filtering device in a first embodiment of the present invention. Figure 2 FIG. 1 is a schematic diagram of a filtering device in a second embodiment of the present invention. Figure 1 and Figure 2 As shown, the filtering device 100 may include: a first water inlet 1 ; a first water outlet 2 ; a housing 3 ; a mineral releasing unit 4 ; and a first filtering unit 5 .

[0107] Among them, Figure 1 and Figure 2 As shown, a cavity 6 is formed in the housing 3. A mineral release unit 4 and a first filter unit 5 are arranged in the cavity 6. Meanwhile, a preset volume of water can be accommodated in the cavity 6. The cavity 6 includes a first area 61 for diluting the minerals released by the mineral release unit 4 and a second area 62 located outside the first area 61. The first area 61 is provided with the mineral release unit 4, and the second area 62 can accommodate a part of the preset volume of water and is provided with the first filter unit 5. The first water inlet 1 is connected to the first water outlet 2 through the mineral release unit 4 and the second area 62.

[0108] When the filter device 100 is not outputting mineral water for a long time, the water in the first area 61 of the filter device 100 is in contact with the mineral release unit 4 for a long time. At this time, the mineral release unit 4 will continuously release minerals into the water. Since the second area 62 can accommodate part of the preset volume of water, the minerals released into the water can diffuse into the water in the second area 62. In this way, the concentration of the mineral water in the first area 61 can be diluted, and the degree of increase in the concentration of the mineral water in the cavity 6 of the entire shell 3 can be reduced. When the filter device 100 needs to output mineral water again, water enters the cavity 6 of the shell 3 from the first water inlet 1, and the mineral water with a slightly increased concentration in the cavity 6 is directly output for the user to use, and there will be no direct output of high-concentration mineral water. In this way, the problem of too high mineral concentration in the mineral water when the filter device 100 outputs mineral water again after not outputting mineral water for a long time can be solved, so that the mineral concentration in the mineral water is stable within a certain reasonable range when the filter device 100 outputs mineral water again after not outputting mineral water for a long time, which meets the general healthy drinking recommendation requirements.

[0109] In addition, the second area 62 in the filter device 100 can not only accommodate part of the preset volume of water, but also can be provided with a first filter unit 5. The water can also be filtered by the first filter unit 5 before flowing out from the first water outlet 2. In this way, the filter device 100 can be combined with a filter unit, so that the filter unit itself can be used to accommodate part of the preset volume of water, thereby optimizing the structure of the water purification system and reducing the volume of the overall water purification system.

[0110] In order to better understand the filter device 100 in the present application, it will be further explained and illustrated below. Figure 1 and Figure 2 As shown, the first water inlet 1 is used to input water into the cavity 6 of the shell 3, and the first water outlet 2 is used to output the water in the cavity 6 of the shell 3. The first water inlet 1 and the first water outlet 2 can be located on the shell 3. A cavity 6 is formed in the shell 3, and the cavity 6 is used to accommodate the mineral release unit 4, the first filter unit 5, and water that can accommodate a preset volume. The cavity 6 may include a first area 61 for diluting the minerals released by the mineral release unit 4 and a second area 62 located outside the first area 61. The mineral release unit 4 is located in the first area 61. The second area 62 can accommodate part of the preset volume of water and is provided with the first filter unit 5. In this way, the first filter unit 5 and the mineral release unit 4 can be compounded in the filter device 100. The first filter unit 5 can be any filter unit with a filtering function, and is not limited in this application.

[0111] The remaining preset volume of water that can be accommodated in the cavity 6 is located in the first area 61 and contacts the mineral releasing unit 4 . The minerals released by the mineral releasing unit 4 first enter into this part of the water.

[0112] In order to ensure that the preset volume of water that can be contained in the cavity 6 plays a sufficient dilution role on the minerals released by the mineral release unit 4, it is feasible that the volume of the cavity 6 occupied by the mineral release unit 4 does not exceed half of the volume of the cavity 6. The water contained in the cavity 6 can penetrate into the mineral release unit 4, which can increase the area of ​​contact between the water and the mineral release unit 4. When the mineral water is normally produced, the water can flow into the mineral release unit 4, and the high-concentration mineral water from the mineral release unit 4 can enter other areas in the cavity 6, which is convenient for the mineral release unit 4 to release minerals and form a certain concentration of mineral water. Of course, the water contained in the cavity 6 may not penetrate into the mineral release unit 4, which can reduce the contact area between the mineral filter material and the water. For example, the mineral release unit 4 may include mineral release particles 42, at which time, the water that can be contained in the cavity 6 can penetrate into the gaps between the mineral release particles 42, and can also penetrate into the interior of the mineral release particles 42. For another example, the mineral release unit 4 may include a mineral release material compressed into a block. For example, the mineral release material is mixed with carbon powder and adhesive and then placed in a mold, compressed under a certain pressure, and then placed in a sintering furnace for heating and sintering, and then a block of mineral release material can be formed. At this time, water can penetrate into the mineral release unit 4, which specifically means that the water that can be contained in the cavity 6 can penetrate into the interior of the block of mineral release material.

[0113] Since the second area 62 can accommodate a part of the preset volume of water and is provided with the first filter unit 5, in order to reduce the volume of the second area 62 and increase the volume of the water that can be accommodated in the second area 62 as much as possible, the water that can be accommodated in the second area 62 can penetrate into the first filter unit 5. In this way, the volume of the filter device 100 can be effectively reduced under the premise of accommodating the same volume of water.

[0114] The first water inlet 1 is connected to the first water outlet 2 through the mineral release unit 4 and the second area 62. The water flowing into the first water inlet 1 passes through the mineral release unit 4 and the second area 62 and is then output from the first water outlet 2. When the water flows through the mineral release unit 4, mineral water is formed, and then the mineral water is output from the first water outlet 2. When the water flows through the second area 62, the water is filtered by the first filter unit 5, and the filtered water is output from the first water outlet 2. Therefore, the water output from the first water outlet 2 can be filtered mineral water.

[0115] When the filter device 100 is not outputting mineral water for a long time, the water in the first area 61 of the filter device 100 is in contact with the mineral release unit 4 for a long time, and the mineral release unit 4 will continuously release minerals into the water, and the concentration of mineral water in or near the mineral release unit 4 is relatively high. However, since the second area 62 can accommodate part of the preset volume of water, the minerals released into the water can diffuse into the water in the second area 62, so that the concentration of the mineral water in the first area 61 can be diluted, and the degree of increase in the concentration of the mineral water in the cavity 6 of the entire shell 3 can be reduced. When the filter device 100 needs to output mineral water again, water enters the cavity 6 of the shell 3 from the first water inlet 1, and the mineral water with a slightly increased concentration in the cavity 6 is directly output for use by the user, and there will be no high-concentration mineral water directly output in or near the mineral release unit 4, so that the problem of too high mineral concentration in the mineral water when the filter device 100 outputs mineral water again after not outputting mineral water for a long time can be solved.

[0116] As feasible, along the direction of water flow from the first water inlet 1 to the first water outlet 2, the mineral release unit 4 is located upstream of the first filter unit 5. The mineral water formed by the water flowing through the mineral release unit 4 needs to be filtered by the first filter unit 5 before flowing out from the first water outlet 2, so that the fine particles dropped into the water by the mineral release unit 4 can be filtered out by the first filter unit 5 to ensure the quality of the mineral water. For example, the first filter unit 5 may include activated carbon, which may be in the form of particles, or may be in the form of carbon rods, carbon fibers, etc., and is not limited in this application. The activated carbon can not only adsorb non-mineral substances released from the mineral release unit 4, but also improve the taste of the mineral water, eliminate odors, etc.

[0117] In the above embodiment, even if the concentration of mineral water in or near the mineral release unit 4 is high and has not been fully diffused into the water in the second area 62, when the filter device 100 outputs mineral water from the first water outlet 2, the mineral water with a higher concentration in or near the mineral release unit 4 will inevitably pass through the second area 62 before flowing out from the first water outlet 2. At this time, this part of the mineral water with a higher concentration will be mixed with the water in the second area 62, so that this part of the mineral water with a higher concentration is fully diluted. The mineral water that finally flows out from the first water outlet 2 is the mineral water with a lower concentration after dilution, and there will be no high-concentration mineral water directly output from or near the mineral release unit 4.

[0118] Further, such as Figure 1 and Figure 2As shown, the mineral release unit 4 can be arranged near the first water inlet 1. In this way, even if the mineral water with a high concentration in or near the mineral release unit 4 diffuses toward the first water outlet 2, there is more water downstream of the mineral release unit 4 to dilute the mineral water with a high concentration, so that the concentration of the mineral water downstream of the mineral release unit 4 will not be high. Since when the filter device 100 outputs mineral water, the mineral water downstream of the mineral release unit 4 is directly output from the first water outlet 2 to the user, it can better ensure that the mineral concentration in the mineral water will not be too high when the filter device 100 outputs mineral water again after not outputting mineral water for a long time.

[0119] As a feasible embodiment, the water outlet of the first filter unit 5 is connected to the first water outlet 2. In a feasible embodiment, as Figure 1 As shown, the mineral release unit 4 may include: a shell 41; mineral release particles 42 disposed in the shell 41; the inlet of the shell 41 is connected to the first water inlet 1; and the outlet of the shell 41 is connected to the water inlet of the first filter unit 5. The mineral release particles 42 are limited by the shell 41; the interior of the shell 41 may be a first area 61; and the exterior of the shell 41 may be a second area 62. Water flowing in from the first water inlet 1 enters the inlet of the shell 41, and contacts the mineral release particles 42 in the shell 41, thereby forming mineral water. After the mineral water flows out from the outlet of the shell 41, it enters the water inlet of the first filter unit 5, and after being filtered by the first filter unit 5, it flows out from the water outlet of the first filter unit 5, and finally flows out from the first water outlet 2 for use by the user.

[0120] In another possible implementation, if Figure 2 As shown, the mineral release unit 4 may include a mineral release material compressed into a block, the water inlet of the mineral release material is connected to the first water inlet 1, and the water outlet of the mineral release member is connected to the inlet of the first filter unit 5. As feasible, the mineral release unit 4 may be arranged between the first water inlet 1 and the inlet of the first filter unit 5. Further, the gap between the edge of the mineral release unit 4 and the side wall of the housing 3 is as small as possible, or the edge of the mineral release unit 4 and the side wall of the housing 3 are in a sealed state, so that the water flowing in from the first water inlet 1 can enter the inlet of the first filter unit 5 only after passing through the mineral release unit 4 as much as possible to form mineral water, thereby ensuring the concentration of the formed mineral water and preventing the water flowing in from the first water inlet 1 from bypassing the mineral release unit 4 and directly entering the inlet of the first filter unit 5.

[0121] As feasible, the mineral releasing material in the mineral releasing unit 4 may include common minerals containing trace elements required by the human body, which can form mineral water after being soaked in water, such as medical stone, wooden fish stone, Bian stone, olivine, limestone, pearl shell, tourmaline, etc. Of course, the mineral releasing unit 4 may also be made of other mineral releasing materials that can form mineral water, which is not limited in the present application.

[0122] As feasible, Figure 4 FIG. 4 is a schematic diagram of a filter device in a fourth embodiment of the present invention. Figure 4 As shown, the first area 61 forms a first chamber, and the second area 62 forms a second chamber. The first chamber and the second chamber may be independent. The first chamber is connected to the second chamber; or, in a preset state, the first chamber is connected to the second chamber. The housing 3 may include a first housing 31, and the first chamber and the second chamber may be located in the same first housing 31.

[0123] In one possible implementation, Figure 8 FIG. 1 is a schematic diagram of the structure of the filtering device in the eighth embodiment of the present invention. Figure 8 As shown, the filter device 100 comprises: a partition 16 disposed in the housing 3, the partition 16 divides the cavity 6 into a first area 61 and a second area 62 along the axial direction of the housing 3; the mineral release unit 4 is tubular, the tube body 23 is inserted into the mineral release unit 4, and the tube body 23 and the inner side wall of the mineral release unit 4 form a water inlet channel 22 connected to the first water inlet 1; the first filter unit 5 is tubular, the outer side wall of the mineral release unit 4 is connected to the outer side wall of the first filter unit 5, and the inner side wall of the first filter unit 5 is connected to the first water outlet 2 through the inside of the tube body 23. Through the above structure, the radial size of the filter device 100 can be greatly reduced.

[0124] In the above embodiment, water is input from the first water inlet 1, reaches the water inlet channel 22 formed between the tube body 23 and the inner wall of the mineral release unit 4, and then flows into the mineral release unit 4 from the inner wall of the mineral release unit 4. The formed mineral water flows out from the outer wall of the mineral release unit 4, and the mineral water passes downward through the gap between the outer wall of the partition 16 and the outer shell 3 to reach the gap between the outer wall of the first filter unit 5 and the outer shell 3, and then enters the first filter unit 5 from the outer wall of the first filter unit 5 for filtration. The filtered water flows out from the inner wall of the first filter unit 5, and then flows upward into the tube body 23, and finally flows out from the first water outlet 2.

[0125] In other feasible embodiments, the housing 3 may include a first housing 31 and a second housing 32. The first chamber is formed in the first housing 31, and the second chamber is formed in the second housing 32.

[0126] In one embodiment, Figure 3 FIG. 1 is a schematic diagram of a filtering device in a third embodiment of the present invention. Figure 3 As shown, the first housing 31 and the second housing 32 are independent of each other.

[0127] In another embodiment, Figure 7 FIG. 1 is a schematic diagram of the structure of the filter device in the seventh embodiment of the present invention. Figure 7 As shown, the second housing 32 can be disposed in the first housing 31, and a first chamber is formed between the outer wall of the second housing 32 and the inner wall of the first housing 31. The first chamber is connected to the second chamber through the connecting portion 21 of the second housing 32.

[0128] In the above embodiment, if Figure 7 As shown, the first filter unit 5 may be in the shape of a carbon rod, the water inlet of the first filter unit 5 is located at the outer side wall of the first filter unit 5, there is a gap between the outer side wall of the first filter unit 5 and the inner side wall of the second shell 32, and the gap between the outer side wall of the first filter unit 5 and the inner side wall of the second shell 32 is connected to the first chamber through the connecting portion 21. The water outlet of the first filter unit 5 is located at the inner side wall of the first filter unit 5, and the water outlet of the first filter unit 5 is connected to the first water outlet 2. Further, the filter device 100 may include: a fourth filter unit 7 arranged at the connecting portion 21. The fourth filter unit 7 includes: a bracket, a flow passage extending in a radial direction is formed on the bracket, and the flow passage connects the first chamber and the gap between the outer side wall of the first filter unit 5 and the inner side wall of the second shell 32; a filter element for filtering activated carbon arranged at the flow passage.

[0129] In the above embodiment, if Figure 7 As shown, the mineral release unit 4 may include: a mineral release material; a first limiting unit, the first limiting unit is located between the mineral release material and the first water inlet 1, and is used to prevent the mineral release material from flowing toward the first water inlet 1. The first limiting unit includes: a support frame 12 and a first filter 13. The support frame 12 is provided with a plurality of flow holes 121. A first filter 13 is provided between the first limiting member near the first water inlet 1 and the mineral release unit 4 to prevent the mineral release unit 4 from flowing toward the first water inlet 1.

[0130] The water flowing in from the first water inlet 1 enters the first chamber formed between the outer wall of the second housing 32 and the inner wall of the first housing 31, and forms mineral water after passing through the mineral release unit 4. The mineral water is filtered by the fourth filter unit 7 at the connecting portion 21, and then enters the second housing 32 to reach the gap between the outer wall of the first filter unit 5 and the inner wall of the second housing 32, enters the first filter unit 5 from the outer wall of the first filter unit 5 for filtration, and the filtered mineral water flows out from the inner wall of the first filter unit 5, and finally flows to the first water outlet 2.

[0131] As feasible, Figure 7 As shown, the filtering device 100 may include: a fourth filtering unit 7 for filtering activated carbon disposed in the housing 3, and the water filtered by the activated carbon flows to the first water outlet 2 after being filtered by the fourth filtering unit 7. For example, the fourth filtering unit 7 may include a micro-filtering unit, such as a micro-filtration membrane.

[0132] As feasible, Figure 6 FIG. 1 is a schematic diagram of the structure of the filter device in the sixth embodiment of the present invention. Figure 6 As shown, the filter device 100 may include: a barrel unit 8 disposed in the housing 3, a third area independent of the first area 61 and the second area 62 is formed in the barrel unit 8; a second filter unit 9 disposed in the third area, the second filter unit 9 including a pre-filter unit; a second water inlet 10 and a second water outlet 11, the water inlet of the second filter unit 9 is connected to the second water inlet 10, and the water outlet of the second filter unit 9 is connected to the second water outlet 11. In the above-mentioned filter device 100, the pre-filter unit can be combined with the mineral release unit 4 and the first filter unit 5, so as to reduce the number of filter devices 100 in the water purification system and reduce the frequency of replacement of the filter device 100 by the user. In the water purification system, raw water flows in from the second water inlet 10 of the filter device 100, and flows out from the second water outlet 11 after being filtered by the second filter unit 9. The outflowing water can then be filtered by other filter units in the water purification system, and then flows in from the first water inlet 1 of the filter device 100, and forms mineral water after passing through the mineral release unit 4. After being filtered by the first filter unit 5 and the fourth filter unit 7, the water is output from the first water outlet 2. In this embodiment, the first area 61 and the second area 62 are formed between the outer wall of the cylinder and the inner wall of the shell 3.

[0133] As feasible, Figure 6As shown, the first water inlet 1 and the first water outlet 2 are located at the same end of the housing 3. The filter device 100 may include: a partition 16 sleeved outside the cylinder, the partition 16 separates the cylinder and the housing 3 into a first flow channel 17 and a second flow channel 18, the first flow channel 17 and the second flow channel 18 are connected at one end away from the first water inlet 1 and the first water outlet 2, and the first water inlet 1 is connected to the first water outlet 2 through the first flow channel 17 and the second flow channel 18 in sequence; the mineral release unit 4 is arranged in the first flow channel 17 or the second flow channel 18, and the first filter unit 5 is arranged in the first flow channel 17 or the second flow channel 18. By arranging the partition 16, the first water inlet 1 and the first water outlet 2 can be located at the same end of the housing 3, so that the inlet and outlet water of the filter device 100 can be connected to other components.

[0134] Further, such as Figure 6 As shown, the mineral release unit 4 and the first filter unit 5 can be arranged in the first flow channel 17. The filter device 100 may include: a fourth filter unit 7 for filtering activated carbon arranged between the cylinder and the housing 3. The fourth filter unit 7 may include: a bracket, on which a flow passage extending in a radial direction is formed, the flow passage connecting the first flow channel 17 and the second flow channel 18; and a filter element for filtering activated carbon arranged at the flow passage. There may be multiple flow passages, which are distributed along the circumferential direction of the filter device 100.

[0135] like Figure 6 As shown, the fourth filter unit 7 can be located below the partition 16, and the two are arranged in the vertical direction. Further, they can be arranged in the same straight line in the vertical direction, so that the radial size of the filter device 100 can be reduced. The lower end of the cylinder has a step structure, and the upper end of the bracket also has a step structure. The step structures of the cylinder and the bracket cooperate with each other to ensure a sealing effect between the two.

[0136] As feasible, Figure 6 As shown, the filter device 100 may include: two support frames 12 arranged between the outer wall of the barrel unit 8 and the inner wall of the housing 3. A first area 61 is formed between the two support frames 12. Fig. 9 FIG. 1 is a schematic diagram of the structure of the support frame in the filter device in an embodiment of the present invention. Fig. 9As shown, a plurality of flow holes 121 are provided on the support frame 12, and a first filter 13 is provided between the support frame 12 near the first water inlet 1 and the mineral release unit 4 to prevent the mineral release unit 4 from flowing toward the first water inlet 1. A second filter 14 is provided between the support frame 12 far from the first water inlet 1 and the first filter unit 5 to prevent the mineral release unit 4 from flowing toward the first filter unit 5. A sealing member 122 may be provided at the inner and outer walls of the support frame 12, for example, it may be made of soft rubber, so as to ensure the sealing between the inner and outer walls of the support frame 12 and the outer wall of the barrel unit 8 and the inner wall of the housing 3, respectively, so that the water flowing out of the first water inlet 1 must pass through the mineral release unit 4 in the first area 61 to reach the first filter unit 5, so as to ensure the formation of mineral water of a certain concentration. The first filter 13 and the second filter 14 may be made of non-woven fabric, which has good water permeability and can prevent the mineral release unit 4 from flowing toward the first water inlet 1 or the first filter unit 5. Especially when the filter device 100 is placed horizontally, it can prevent the mineral release unit 4 and the first filter unit 5 from piling up downwards, causing a short circuit at the top.

[0137] As feasible, Figure 6 As shown, the filtering device 100 may include: a central tube 15 with a through hole disposed in the barrel unit 8, a pre-filter unit sleeved outside the central tube 15, the central tube 15 being connected to the second water outlet 11, a water inlet of the pre-filter unit being located at the outer side wall, a water outlet of the pre-filter unit being located at the inner side wall, and a gap being connected to the second water inlet 10 between the outer side wall of the pre-filter unit and the inner side wall of the barrel unit 8. The raw water flowing in from the second water inlet 10 enters the gap between the outer side wall of the pre-filter unit and the inner side wall of the barrel unit 8, and then enters the pre-filter unit from the outer side wall of the pre-filter unit for filtration, the raw water flows inwardly in the pre-filter unit along the radial direction, the water filtered by the pre-filter unit flows out from the inner side wall of the pre-filter unit, enters the central tube 15 through the through hole, and finally flows out from the second water outlet 11.

[0138] In other embodiments, Figure 5 FIG. 1 is a schematic diagram of a filtering device in a fifth embodiment of the present invention. Figure 5As shown, the filter device 100 may include: a fine filter unit 19; a second filter unit 9, the second filter unit 9 includes a pre-filter unit, the fine filter unit 19 and the second filter unit 9 are located in the housing 3; a wastewater outlet 20, the wastewater outlet end of the fine filter unit 19 is connected to the wastewater outlet 20; the water flowing in from the first water inlet 1 can be filtered through the second filter unit 9 and the fine filter unit 19 in sequence to obtain clean water, and the clean water passes through the mineral release unit 4 and the first filter unit 5 in sequence and then flows out from the first water outlet 2. Through this structure, the pre-filter unit, the fine filter unit 19, the mineral release unit 4, and the first filter unit 5 can be combined in one filter device 100, which greatly simplifies the water purification system.

[0139] The fine filtration unit 19 may be any filtration unit for fine filtration of water, which may generate wastewater during filtration. For example, the fine filtration unit 19 may include at least one of the following: a reverse osmosis membrane filtration unit, a nanofiltration membrane filtration unit, an ultrafiltration membrane filtration unit, and the like.

[0140] In the above implementation, as feasible, Figure 5 As shown, the second filter unit 9 can be sleeved outside the fine filter unit 19. The filter device 100 also includes: a barrel unit 8, the fine filter unit 19 is sleeved outside the barrel unit 8, and the barrel unit 8 has a first area 61 and a second area 62. The purified water outlet of the fine filter unit 19 is connected to the first filter unit 5 through the connection of the barrel unit 8. The filter device 100 may include: a second water outlet 11, the second water outlet 11 is connected to the purified water outlet of the fine filter unit 19. The second water outlet 11 is used to output the purified water output by the fine filter unit 19. The first water outlet 2 is used to output mineral water.

[0141] A water purification system is also proposed in this application. Fig.10 This is a schematic diagram of a water purification system in a first embodiment of the present invention. Fig.11 FIG. 1 is a schematic diagram of a water purification system in a second embodiment of the present invention. Fig.10 and Fig.11 As shown, the water purification system may include: a fine filtration unit 19; a filtration device 100 such as any of the above-mentioned ones, wherein the first water inlet 1 of the filtration device 100 is connected to the purified water outlet of the fine filtration unit 19; a first water outlet waterway 200, which can be connected to the first water outlet 2 of the filtration device 100; and a second water outlet waterway 300, which can be connected to the purified water outlet of the fine filtration unit 19.

[0142] The purified water obtained by filtering through the fine filtering unit 19 can be delivered to the filtering device 100 so that the filtering device 100 can form mineral water and be filtered through the first filtering unit 5, or can be output to the first water outlet waterway 200 so as to be output for use by the user. The first water outlet waterway 200 can be used to output the mineral water formed by the water purification system. The second water outlet waterway 300 can be used to output the purified water formed by the fine filtering unit 19.

[0143] As feasible, the water purification system can have a first state and a second state. In the first state, the second water outlet waterway 300 is in a connected state with the purified water outlet end of the fine filter unit 19, and the first water outlet waterway 200 is in a disconnected state with the purified water outlet end of the fine filter unit 19, so that the water purification system can output purified water. In the second state, the second water outlet waterway 300 is in a disconnected state with the purified water outlet end of the fine filter unit 19, and the first water outlet waterway 200 is in a connected state with the purified water outlet end of the fine filter unit 19, so that the water purification system can output mineral water.

[0144] In order to achieve the above-mentioned purpose, a water circuit control unit can be connected to the connection between the second water outlet waterway 300 and the clean water outlet end of the fine filtration unit 19. The water circuit control unit can be a three-way switching valve or two on-off valves. One switching valve is connected to the second water outlet waterway 300, and the other switching valve is connected to the branch waterway from the clean water outlet end of the fine filtration unit 19 to the filtration device 100.

[0145] As a feasible method, the water purification system can have a third state. In the third state, the second water outlet waterway 300 is in communication with the purified water outlet end of the fine filtration unit 19, and the first water outlet waterway 200 is in communication with the purified water outlet end of the fine filtration unit 19. In the third state, the water purification system can output mineral water and purified water at the same time. For example, the output mineral water and purified water can be mixed again, and new mineral water with a lower concentration can be obtained in this way.

[0146] Furthermore, the first water outlet waterway 200 and the second water outlet waterway 300 are connected to the same water outlet port 400. When the water purification system is in the third state, the mineral water and purified water outputted by the water purification system at the same time can be outputted from the same water outlet port 400 to the user. When outputted from the same water outlet port 400, the mineral water and purified water can be directly mixed and outputted to the user. When receiving water, the user can directly obtain new mineral water with a lower concentration without any other additional operations. The water outlet port 400 can be any water output mechanism, such as various types of faucets.

[0147] As feasible, Fig.10As shown, the water purification system may include: a third filter unit 500. The water inlet of the third filter unit 500 is connected to the purified water outlet of the fine filter unit 19, and the second water outlet waterway 300 can be connected to the water outlet of the third filter unit 500. The third filter unit 500 includes a post-filter unit. The third filter unit 500 can be used to perform post-filter treatment on the purified water output by the fine filter unit 19, for example, it can absorb foreign colors and odors in the purified water and adjust the taste of the purified water.

[0148] As feasible, Fig.10 As shown, the third filter unit 500 and the fine filter unit 19 are integrated in a filter device 100. In this way, the number of filter devices 100 in the entire water purification system can be reduced, the volume of the entire water purification system can be optimized, and the frequency of replacing the filter unit by the user can be reduced.

[0149] As feasible, Fig.10 As shown, the water purification system may include: a second filter unit 9, the water outlet of the second filter unit 9 can be connected to the raw water inlet of the fine filter unit 19. The second filter unit 9 includes a pre-filter unit. The filter device 100 may include: a barrel unit 8 arranged in the housing 3, a third area independent of the first area 61 and the second area 62 is formed in the barrel unit 8; the second filter unit 9 is arranged in the third area; a second water inlet 10 and a second water outlet 11, the water inlet of the second filter unit 9 is connected to the second water inlet 10, and the water outlet of the second filter unit 9 is connected to the second water outlet 11; the second water outlet 11 is connected to the raw water inlet of the fine filter unit 19. In this embodiment, the second filter unit 9 and the mineral release unit 4 and the first filter unit 5 are integrated in a filter device 100. Similarly, in this way, the number of filter devices 100 in the entire water purification system can be reduced, the volume of the entire water purification system can be optimized, and the frequency of user replacement of the filter unit can be reduced.

[0150] In other feasible embodiments, the water purification system may include: a second filter unit 9, the water outlet of the second filter unit 9 can be connected to the raw water inlet of the fine filter unit 19; the second filter unit 9 includes a pre-filter unit. The first filter unit 5 includes a post-filter unit, the water inlet of the first filter unit 5 is connected to the water outlet of the mineral release unit 4, and the water outlet of the first filter unit 5 is connected to the first water outlet waterway 200. In this embodiment, the purified water passing through the mineral release unit 4 forms mineral water, which is filtered by the post-filter unit and then output from the first water outlet waterway 200 for user use. The purified water obtained by filtration in the fine filter unit 19 can be directly output from the second water outlet waterway 300 for user use. Further, as Fig.11As shown, the second filter unit 9, the fine filter unit 19, the mineral release unit 4, and the first filter unit 5 can be integrated in the same filter device 100. In this way, the number of filter devices 100 in the entire water purification system can be reduced, so that the entire water purification system only uses one filter device 100, which maximizes the optimization of the volume of the entire water purification system and reduces the frequency of users replacing filter units.

[0151] As feasible, Fig.10 and Fig.11 As shown, the water purification system may include an inlet valve 600 and a booster device 700. The inlet valve 600 is used to control the on-off between the inlet of the water purification system and the water source, and a solenoid valve may be used. The booster device 700 is used to boost the raw water entering the water purification system, thereby increasing the clean water flow of the fine filter unit 19. After the water from the water source passes through the inlet valve 600, it can pass through the pre-filter unit and the booster device 700, and then enter the fine filter unit 19. The wastewater outlet of the fine filter unit 19 can be connected to the wastewater discharge waterway 1000, and a wastewater ratio device can be connected to the wastewater discharge waterway 1000. Further, a multifunctional valve 10001 with a wastewater ratio function and an on-off function can be connected to the wastewater discharge waterway 1000. In this embodiment, the downstream of the clean water outlet of the fine filter unit 19 can be connected to the upstream of the raw water inlet of the fine filter unit 19 through the reflux waterway 800, for example, connected to the upstream of the pre-filter unit. The clean water formed by the fine filter unit 19 can be returned to the pre-filter unit or the booster 700 for storage through the reflux waterway 800, so as to flush the raw water side of the fine filter unit 19 or replace the raw water or waste water on the raw water side, thereby reducing the TDS value of the clean water just output after the water purification system has been left idle for a long time. A first one-way valve 8001 can be provided on the reflux waterway 800, and the one-way valve can make the downstream of the clean water outlet of the fine filter unit 19 conduct to the upstream direction of the raw water inlet of the fine filter unit 19. In this embodiment, the wastewater outlet of the fine filter unit 19 can be connected to the upstream of the raw water inlet of the fine filter unit 19 and the downstream of the pre-filter unit through the connecting waterway 900, and the connecting waterway 900 is provided with an opening and closing valve 9001. When the water purification system circulates to produce clean water and does not discharge clean water and waste water, the connecting waterway 900 can be in a connected state. At this time, the clean water formed by the fine filtration unit 19 flows back to the pre-filtration unit or the boosting device 700 for storage, and the generated waste water flows back to the upstream of the raw water inlet of the fine filtration unit 19 and the downstream of the pre-filtration unit. This can effectively reduce the pressure on the filter membrane in the fine filtration unit 19 and avoid its damage.

[0152] As feasible, Fig.10As shown, a second one-way valve 2001 may be provided on the first water outlet waterway 200, and the second one-way valve 2001 can make the first water outlet 2 of the filter device 100 conduct to the water outlet end. The second one-way valve 2001 can prevent the purified water in the second water outlet waterway 300 from causing partial backflow of the water in the first water outlet waterway 200. A third one-way valve 1100 may be connected between the purified water outlet end of the fine filtration unit 19 and the inlet of the second water outlet waterway 300, and the third one-way valve 1100 can make the purified water outlet end of the fine filtration unit 19 conduct to the inlet direction of the second water outlet waterway 300.

[0153] The present application also proposes a control method using any of the above-mentioned water purification systems, the control method comprising:

[0154] When it is necessary to output mineral water, determine whether the first preset condition is met. The first preset condition may indicate that the water purification system has not output mineral water for a long time, and a large amount of minerals in the mineral release unit 4 in the filter device 100 are released into the water, causing the concentration of the mineral water retained in the filter device 100 to increase significantly. If the mineral water is directly output, the mineral concentration in the first cup of mineral water obtained by the user will be high. Specifically, the first preset condition includes at least one of the following: the interval between the need to output mineral water this time and the last output of mineral water exceeds the preset time, the concentration of mineral water at the mineral release unit 4 exceeds the first preset concentration value, the concentration of mineral water output by the mineral release unit 4 exceeds the second preset concentration value, the concentration of mineral water output by the second area 62 exceeds the third preset concentration value, and so on.

[0155] If the first preset condition is met, the mineral water outputted from the first water outlet waterway 200 and the purified water outputted from the second water outlet waterway 300 are mixed and then outputted. In this step, the water purification system outputs mineral water and purified water at the same time, and the purified water is used to dilute the mineral water with a higher concentration, so that the concentration of the diluted mineral water is basically the same as that of the mineral water normally produced, so that the water purification system can output mineral water with a stable concentration at any time, and there will be no problem of excessively high concentration of mineral water.

[0156] In the above steps, the first water outlet waterway 200 can be controlled to be connected to the second area 62, and the second water outlet waterway 300 can be controlled to be connected to the purified water outlet end of the fine filtration unit 19, so that the mineral water output by the first water outlet waterway 200 is mixed with the purified water output by the second water outlet waterway 300.

[0157] In the above steps, the mineral water output by the first water outlet waterway 200 and the purified water output by the second water outlet waterway 300 can be mixed at the same water outlet end and then output, or they can be output from the same water outlet end. The output mineral water and purified water can be mixed in the user's cup to form diluted mineral water.

[0158] When the mineral water outputted from the first water outlet waterway 200 is mixed with the purified water outputted from the second water outlet waterway 300 and then outputted, the time for the second water outlet waterway 300 to output purified water can be controlled, thereby controlling the mixing ratio of the mineral water and purified water, so as to control the concentration of the diluted mineral water. The time for the second water outlet waterway 300 to output purified water can be controlled according to one or more of the factors such as the interval between the time when the mineral water needs to be outputted this time and the last time when the mineral water was outputted, the concentration of the mineral water at the mineral release unit 4, the concentration of the mineral water outputted from the mineral release unit 4, and the concentration of the mineral water outputted from the second area 62. The larger the value of the above parameters, the longer the time for the second water outlet waterway 300 to output purified water.

[0159] As a feasible method, if the first preset condition is not met, the mineral water outputted from the first water outlet waterway 200 is outputted. This indicates that the concentration of the mineral water retained in the filter device 100 has not increased significantly. If the mineral water is directly outputted, the mineral concentration in the first cup of mineral water obtained by the user will not be high. In this step, the second water outlet waterway 300 can be controlled to be disconnected from the purified water outlet of the fine filtration unit 19, and the first water outlet waterway 200 can be connected to the purified water outlet of the fine filtration unit 19.

[0160] As a feasible method, the control method may include: when it is necessary to output purified water, controlling the first water outlet waterway 200 to be disconnected from the second area 62, and connecting the second water outlet waterway 300 to the purified water outlet end of the fine filtration unit 19, so that the purified water output from the purified water outlet end of the fine filtration unit 19 is output through the second water outlet waterway 300.

[0161] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps here also contemplates the implementation method consisting essentially of these elements, ingredients, parts or steps. Here, by using the term "may", it is intended to illustrate that any attribute described that "may" includes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

[0162] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A filtering device, characterized in that: The filtering device comprises: a first water inlet and a first water outlet; A shell, wherein a cavity is formed in the shell, wherein a mineral release unit, a first filter unit, and water capable of accommodating a preset volume are arranged in the cavity, wherein the cavity comprises a first area for diluting the minerals released by the mineral release unit and a second area outside the first area, wherein the mineral release unit is arranged in the first area, and the second area capable of accommodating a part of the preset volume of water and the first filter unit is arranged; The first water inlet is communicated with the first water outlet through the mineral releasing unit and the second area.

2. The filtering device according to claim 1, characterized in that: The volume of the cavity occupied by the mineral release unit does not exceed half of the volume of the cavity.

3. The filtering device according to claim 2, characterized in that: The water is able to penetrate into the mineral release element.

4. The filtering device according to claim 1, characterized in that: Water contained in the second region can penetrate into the first filter unit.

5. The filtering device according to claim 1, characterized in that: The first water inlet and the first water outlet are located on the housing; along the direction of water flow from the first water inlet to the first water outlet, the mineral release unit is located upstream of the first filter unit.

6. The filtering device according to claim 5, characterized in that: The mineral releasing unit is arranged near the first water inlet.

7. The filtering device according to claim 1, characterized in that: The water outlet of the first filter unit is in communication with the first water outlet; The mineral release unit comprises: a shell; mineral release particles arranged in the shell, the inlet of the shell is communicated with the first water inlet, and the outlet of the shell is communicated with the water inlet of the first filter unit; or, The mineral releasing unit comprises a mineral releasing material compressed into a block shape, a water inlet of the mineral releasing material is communicated with the first water inlet, and a water outlet of the mineral releasing member is communicated with an inlet of the first filter unit.

8. The filtering device according to claim 1, characterized in that: The first region forms a first chamber, and the second region forms a second chamber; The first chamber is communicated with the second chamber; or, under a preset state, the first chamber is communicated with the second chamber.

9. The filtering device according to claim 8, characterized in that: The housing includes a first housing and a second housing, the first chamber is formed in the first housing, and the second chamber is formed in the second housing.

10. The filtering device according to claim 1, characterized in that: The first filter unit includes activated carbon.

11. The filtering device according to claim 10, characterized in that: The filtering device further comprises: a fourth filtering unit disposed in the housing and used for filtering activated carbon, and the water filtered by the activated carbon is filtered by the fourth filtering unit and then flows to the first water outlet.

12. The filtering device according to claim 6, characterized in that: The filtering device further comprises: a barrel unit disposed in the housing, wherein a third area independent of the first area and the second area is formed in the barrel unit; A second filter unit disposed in the third area, the second filter unit comprising a pre-filter unit; A second water inlet and a second water outlet, the water inlet of the second filter unit is communicated with the second water inlet, and the water outlet of the second filter unit is communicated with the second water outlet.

13. The filtering device according to claim 12, characterized in that: The filtering device also includes: two support frames arranged between the outer wall of the barrel unit and the inner wall of the outer shell, the first area is formed between the two support frames, a plurality of flow holes are opened on the support frames, a first filter element is arranged between the support frame close to the first water inlet and the mineral release unit to prevent the mineral release unit from flowing toward the first water inlet; a second filter element is arranged between the support frame far from the first water inlet and the first filter unit to prevent the mineral release unit from flowing toward the first filter unit.

14. The filtering device according to claim 12, characterized in that: The filtering device also includes: a central tube with a through hole arranged in the barrel unit, the pre-filter unit is sleeved outside the central tube, the central tube is connected with the second water outlet, the water inlet of the pre-filter unit is located at the outer wall, the water outlet of the pre-filter unit is located at the inner wall, and there is a gap between the outer wall of the pre-filter unit and the inner wall of the barrel unit that is connected with the second water inlet.

15. The filtering device according to claim 12, characterized in that: The first area and the second area are formed between the outer wall of the cylinder and the inner wall of the shell.

16. The filtering device according to claim 15, characterized in that The first water inlet and the first water outlet are located at the same end of the housing; The filtering device also includes: a partition mounted outside the cylinder, the partition separating the cylinder and the shell into a first flow channel and a second flow channel, the first flow channel and the second flow channel are connected at an end away from the first water inlet and the first water outlet, the first water inlet is connected to the first water outlet via the first flow channel and the second flow channel in sequence; the mineral release unit is arranged in the first flow channel or the second flow channel, and the first filtering unit is arranged in the first flow channel or the second flow channel.

17. The filtering device according to claim 16, characterized in that The mineral release unit and the first filter unit are arranged in the first flow channel; The filtering device further comprises: a fourth filtering unit disposed between the cylinder and the housing for filtering activated carbon; The fourth filtering unit comprises: A bracket, wherein a flow passage extending in a radial direction is formed on the bracket, and the flow passage connects the first flow passage and the second flow passage; A filter element for filtering activated carbon is arranged at the flow passage.

18. The filtering device according to claim 9, characterized in that The second shell is disposed in the first shell, and the first chamber is formed between the outer wall of the second shell and the inner wall of the first shell; the first chamber is communicated with the second chamber through the communication portion of the second shell.

19. The filtering device according to claim 18, characterized in that The first filter unit is in the shape of a carbon rod, the water inlet of the first filter unit is located at the outer wall of the first filter unit, there is a gap between the outer wall of the first filter unit and the inner wall of the second shell, and the gap between the outer wall of the first filter unit and the inner wall of the second shell is connected to the first chamber through the connecting portion; The water outlet of the first filter unit is located at the inner side wall of the first filter unit, and the water outlet of the first filter unit is communicated with the first water outlet.

20. The filtering device according to claim 19, characterized in that The filter device further comprises: a fourth filter unit disposed at the connecting portion; the fourth filter unit comprises: A bracket, wherein a flow passage extending in a radial direction is formed on the bracket, wherein the flow passage communicates with the first chamber and a gap between an outer side wall of the first filter unit and an inner side wall of the second housing; A filter element for filtering activated carbon is arranged at the flow passage.

21. The filtering device according to claim 18, characterized in that The mineral release unit comprises: Mineral releasing materials; A first limiting unit is located between the mineral releasing material and the first water inlet, so as to prevent the mineral releasing material from flowing toward the first water inlet.

22. The filtering device according to claim 1, characterized in that The filtering device also includes: Fine filtration unit; a second filter unit, the second filter unit comprising a pre-filter unit, the fine filter unit and the second filter unit being located in the housing; A wastewater outlet, the wastewater outlet end of the fine filtration unit is connected to the wastewater outlet; The water flowing in from the first water inlet can be filtered through the second filter unit and the fine filter unit in sequence to obtain purified water, and the purified water can flow out from the first water outlet after passing through the mineral release unit and the first filter unit in sequence.

23. The filtering device according to claim 22, characterized in that The second filter unit is sleeved outside the fine filter unit. The filtering device further comprises: a barrel unit, the fine filtering unit is sleeved outside the barrel unit, and the barrel unit has the first area and the second area; The purified water outlet end of the fine filtering unit is connected to the first filtering unit through the connecting portion of the cylinder unit.

24. The filtering device according to claim 22, characterized in that The filtering device further comprises: a second water outlet, wherein the second water outlet is communicated with the purified water outlet end of the fine filtering unit.

25. The filtering device according to claim 8, characterized in that The filtering device includes: a partition arranged in the shell, the partition divides the cavity into the first area and the second area along the axial direction of the shell, the mineral release unit is tubular, and a tube body is inserted into the mineral release unit, and a water inlet channel connected to the first water inlet is formed between the tube body and the inner side wall of the mineral release unit; the first filtering unit is tubular, the outer side wall of the mineral release unit is connected to the outer side wall of the first filtering unit, and the inner side wall of the first filtering unit is connected to the first water outlet through the inside of the tube body.

26. A water purification system, characterized in that: The water purification system comprises: Fine filtration unit; The filter device according to any one of claims 1 to 25, wherein the first water inlet of the filter device is connected to the purified water outlet of the fine filtration unit; a first water outlet waterway, the first water outlet waterway being communicable with a first water outlet of the filtering device; The second water outlet waterway is connectable to the purified water outlet end of the fine filtration unit.

27. The water purification system according to claim 26, characterized in that: The water purification system has a first state and a second state. In the first state, the second water outlet waterway is in a connected state with the purified water outlet end of the fine filtering unit, and the first water outlet waterway is in a disconnected state with the purified water outlet end of the fine filtering unit. In the second state, the second water outlet waterway is disconnected from the purified water outlet end of the fine filtering unit, and the first water outlet waterway is connected to the purified water outlet end of the fine filtering unit.

28. The water purification system according to claim 26, characterized in that: The water purification system has a third state. In the third state, the second water outlet waterway is connected to the purified water outlet end of the fine filtration unit, and the first water outlet waterway is connected to the purified water outlet end of the fine filtration unit.

29. The water purification system according to claim 27 or 28, characterized in that: The first water outlet waterway and the second water outlet waterway are connected to the same water outlet port.

30. The water purification system according to claim 27, characterized in that: The water purification system also includes: The third filter unit, the water inlet of the third filter unit is connected with the purified water outlet of the fine filter unit, and the second water outlet waterway can be connected with the water outlet of the third filter unit; the third filter unit includes a post-filter unit.

31. The water purification system according to claim 30, characterized in that: The third filter unit and the fine filter unit are integrated into one filter device.

32. The water purification system according to claim 26, characterized in that: The water purification system further comprises: a second filter unit, the water outlet of the second filter unit being able to communicate with the raw water inlet of the fine filter unit; the second filter unit comprises a pre-filter unit; The filtering device further comprises: a barrel unit disposed in the housing, wherein a third area independent of the first area and the second area is formed in the barrel unit; the second filtering unit is disposed in the third area; A second water inlet and a second water outlet, the water inlet of the second filter unit is connected to the second water inlet, the water outlet of the second filter unit is connected to the second water outlet; the second water outlet is connected to the raw water inlet of the fine filter unit.

33. The water purification system according to claim 26, characterized in that: The water purification system also includes: A second filter unit, wherein the water outlet of the second filter unit can be communicated with the raw water inlet of the fine filter unit; the second filter unit includes a pre-filter unit; The first filter unit includes a post-filter unit, a water inlet of the first filter unit is communicated with a water outlet of the mineral release unit, and a water outlet of the first filter unit is communicated with the first water outlet waterway.

34. The water purification system according to claim 33, characterized in that: The second filter unit, the fine filter unit, the mineral release unit, and the first filter unit are integrated in the same filter device.

35. A control method using the water purification system as claimed in claim 26, characterized in that: The control method comprises: When it is necessary to output mineral water, determining whether the first preset condition is met; If the first preset condition is met, the mineral water output from the first water outlet waterway and the purified water output from the second water outlet waterway are mixed and then output.

36. The control method of the water purification system according to claim 35, characterized in that: The control method further comprises: If the first preset condition is not met, the mineral water outputted by the first water outlet waterway is outputted.

37. The control method of the water purification system according to claim 35, characterized in that: In the step of mixing the mineral water outputted by the first water outlet waterway with the purified water outputted by the second water outlet waterway and then outputting the mixed water, the method comprises: The first water outlet waterway is controlled to be connected to the second area, and the second water outlet waterway is controlled to be connected to the purified water outlet end of the fine filtration unit, so that the mineral water output by the first water outlet waterway is mixed with the purified water output by the second water outlet waterway.

38. The control method of the water purification system according to claim 36, characterized in that: In the step of outputting the mineral water outputted by the first water outlet waterway, the method comprises: The second water outlet waterway is controlled to be disconnected from the purified water outlet end of the fine filtering unit, and the first water outlet waterway is connected to the purified water outlet end of the fine filtering unit.

39. The control method of the water purification system according to claim 35, characterized in that: The first preset condition includes at least one of the following: the interval between the current output of mineral water and the last output of mineral water exceeds the preset time, the concentration of mineral water at the mineral release unit exceeds the first preset concentration value, the concentration of mineral water output by the mineral release unit exceeds the second preset concentration value, and the concentration of mineral water output by the second area exceeds the third preset concentration value.

40. The control method of the water purification system according to claim 35, characterized in that: The control method further comprises: When purified water needs to be output, the first water outlet waterway is controlled to be disconnected from the second area, and the second water outlet waterway is connected to the purified water outlet end of the fine filtration unit, so that the purified water output from the purified water outlet end of the fine filtration unit is output through the second water outlet waterway.

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