Filtering device
By incorporating movable components and a one-way valve structure into the water purification device, manual fluid pressurization is achieved in an environment without electricity, solving the problem of the water purification device being unable to operate in such an environment. This improves water purification efficiency and reliability, reduces energy consumption, and achieves efficient water purification through a reverse osmosis membrane filter.
Patent Information
- Application Number
- CN202423206740.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing water purification devices cannot apply pre-pressure to the reverse osmosis membrane using a booster pump in the absence of electricity, resulting in the inability to obtain pure water and low efficiency and reliability of the filtration device.
A filtration device was designed that uses a movable component to drive a piston to reciprocate within a housing, manually pressurizing the fluid. This device includes a piston cup and a one-way valve structure, enabling fluid pressurization in a power-free environment and ensuring that the fluid flows from the high-pressure chamber to the low-pressure chamber.
It improves the reliability and efficiency of the filtration device in the absence of electricity, reduces energy consumption, extends the service life of the device, and achieves efficient water purification through reverse osmosis membrane filter cartridges.
Smart Images
Figure CN223674391U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water purification technical field, especially a filter device. BACKGROUND
[0002] In the prior art, the water purification needs to power on the booster pump arranged before the reverse osmosis membrane, but in the environment without electricity, the filter device cannot exert the pre-membrane pressure on the reverse osmosis membrane through the booster pump, and cannot obtain pure water, causing inconvenience in use, and low working efficiency and reliability of the filter device. SUMMARY
[0003] The utility model aims at at least solve one of prior art technical problems. For this reason, the utility model aims at providing a filter device, which can improve the reliability of the filter device.
[0004] According to the filter device of the utility model embodiment, the filter device comprises: a shell and a movable assembly, the shell is formed with a first chamber and a second chamber, the first chamber and the second chamber are configured to flow from the first chamber to the second chamber, the movable assembly comprises a connecting rod and a piston, the piston is connected with the connecting rod, the piston divides the first chamber into a first sub-chamber and a second sub-chamber, the connecting rod drives the piston to move between the first sub-chamber and the second sub-chamber, and the first sub-chamber and the second sub-chamber are configured to flow from the first sub-chamber to the second sub-chamber when the pressure in the first sub-chamber is greater than the pressure in the second sub-chamber.
[0005] According to the filter device of the utility model embodiment, by setting the movable assembly, the connecting rod drives the piston to reciprocate along the shell in the axial direction, the fluid in the first sub-chamber flows into the second sub-chamber, the fluid is manually pressurized in the environment without electricity, the pressurized fluid enters the second chamber from the second sub-chamber, the scene of using the filter device is increased, the reliability of the filter device is improved, and the energy consumption of the filter device is reduced.
[0006] In some embodiments, the piston is a leather cup, and the leather cup is configured to flow from the first sub-chamber to the second sub-chamber when the pressure in the first sub-chamber is greater than the pressure in the second sub-chamber.
[0007] In some embodiments, a one-way valve is arranged on the piston, the one-way valve communicates the first sub-chamber and the second sub-chamber, and the one-way valve is configured to flow from the first sub-chamber to the second sub-chamber when the pressure in the first sub-chamber is greater than the pressure in the second sub-chamber.
[0008] In some embodiments, the filter device further comprises a first one-way valve, the first one-way valve being in communication with the first sub-chamber and an outside of the housing, the first one-way valve being configured to allow fluid to flow from the outside of the housing to the first sub-chamber when a pressure in the first sub-chamber is less than a pressure outside of the housing.
[0009] In some embodiments, the filter device further comprises a second one-way valve, the second one-way valve being in communication with the second sub-chamber and the second chamber, the second one-way valve being configured to allow fluid to flow from the second sub-chamber to the second chamber when a pressure in the second sub-chamber is greater than a pressure in the second chamber.
[0010] In some embodiments, the filter device further comprises a filter cartridge and a seal, the filter cartridge being disposed in the second chamber, the seal being disposed between the filter cartridge and a sidewall of the second chamber, the seal dividing the second chamber into a third sub-chamber and a fourth sub-chamber, the third sub-chamber being adjacent to the second sub-chamber, one end of the filter cartridge being disposed in the third sub-chamber, the other end of the filter cartridge being disposed in the fourth sub-chamber.
[0011] In some embodiments, the filter cartridge is formed with a first channel and a second channel, the second channel being disposed on a peripheral side of the first channel, the first channel and the second channel being in communication along a radial direction of the filter cartridge, one end of the second channel being in communication with the third sub-chamber, the housing is formed with a first outlet and a second outlet, the first outlet and the second outlet being spaced apart, the first outlet being in communication with the first channel, the second outlet being in communication with the second channel.
[0012] In some embodiments, the filter cartridge is a reverse osmosis membrane filter cartridge.
[0013] In some embodiments, the housing comprises a first housing, a second housing, and a mounting base, the first housing being formed with a first chamber, the second housing being formed with a second chamber, the mounting base being formed with a third chamber, the first housing and the second housing being respectively connected with the mounting base, the first chamber and the second chamber being in communication through the third chamber.
[0014] In some embodiments, the first housing is formed with a water inlet, the water inlet being in communication with the first sub-chamber.
[0015] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0017] Figure 1 This is a cross-sectional schematic diagram of a filtration device according to an embodiment of the present utility model;
[0018] Figure 2 yes Figure 1 A magnified schematic diagram of region P in the middle.
[0019] Figure label:
[0020] 100. Filtering device;
[0021] 10. Shell; 11. First shell; 111. Inlet; 12. Second shell; 13. Mounting base; 131. Third chamber;
[0022] 20. First chamber; 201. First sub-chamber; 202. Second sub-chamber; 21. Second chamber; 211. Third sub-chamber; 212. Fourth sub-chamber;
[0023] 30. Moving component; 31. Piston; 32. Connecting rod; 33. Handle;
[0024] 40. First check valve; 41. Second check valve;
[0025] 50. Filter element; 51. First channel; 52. Second channel; 53. Seal; 54. First outlet; 55. Second outlet. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-2 The filter device 100 according to an embodiment of the present utility model is described. The filter device 100 includes: a housing 10 and a movable component 30.
[0027] Specifically, such as Figure 1 As shown, the housing 10 has a first chamber 20 and a second chamber 21. The first chamber 20 and the second chamber 21 are configured such that fluid flows from the first chamber 20 to the second chamber 21. The movable component 30 includes a connecting rod 32 and a piston 31. The piston 31 and the connecting rod 32 are connected. The piston 31 divides the first chamber 20 into a first sub-chamber 201 and a second sub-chamber 202. The connecting rod 32 drives the piston 31 to move between the first sub-chamber 201 and the second sub-chamber 202. The first sub-chamber 201 and the second sub-chamber 202 are configured such that when the pressure in the first sub-chamber 201 is greater than the pressure in the second sub-chamber 202, fluid flows from the first sub-chamber 201 to the second sub-chamber 202.
[0028] That is, the piston 31 is arranged in the first chamber 20, the circumference of the piston 31 is attached to the inner side wall of the shell 10, and the first chamber 20 is divided into a first sub-chamber 201 and a second sub-chamber 202. In the first sub-chamber 201, one end of the connecting rod 32 adjacent to the piston 31 is fixedly connected with the piston 31, and the other end of the connecting rod 32 extending along the axial direction of the first chamber 20 and extending out of the shell 10 is provided with a handle 33, and the handle 33 is suitable for driving the connecting rod 32 to move along the axial direction of the first chamber 20, so as to adjust the volume of the first sub-chamber 201 and the second sub-chamber 202.
[0029] When the operator pulls the handle 33 towards the direction away from the shell 10, the volume of the first sub-chamber 201 is reduced, and the volume of the second sub-chamber 202 is increased, so that the pressure in the first sub-chamber 201 is greater than the pressure in the second sub-chamber 202, thereby causing the fluid in the first sub-chamber 201 to flow into the second sub-chamber 202; then the handle 33 is pushed towards the direction of the shell 10, the volume of the second sub-chamber 202 is reduced, so that the fluid pressure in the second sub-chamber 202 is increased, and at the same time, the fluid flows from the second sub-chamber 202 into the second chamber 21, and so on. In the embodiment, the fluid is water to be filtered.
[0030] According to the filtering device 100 of the embodiment of the utility model, the movable assembly 30 is arranged, the connecting rod 32 drives the piston 31 to reciprocate along the axial direction of the shell 10, the fluid in the first sub-chamber 201 flows into the second sub-chamber 202, the fluid is manually pressurized in the environment without electricity, the pressurized fluid flows from the second sub-chamber 202 into the second chamber 21, the scene of using the filtering device 100 is increased, the reliability of the filtering device 100 is improved, and the energy consumption of the filtering device 100 is reduced.
[0031] According to some embodiments of the utility model, as shown in Figure 1 The piston 31 is a leather cup, and the leather cup is configured to allow the fluid to flow from the first sub-chamber 201 to the second sub-chamber 202 when the pressure in the first sub-chamber 201 is greater than the pressure in the second sub-chamber 202.
[0032] In the embodiment, the piston 31 is a leather cup made of rubber. When the operator pulls the handle 33 towards the direction away from the shell 10, the volume of the first sub-chamber 201 is reduced, and the volume of the second sub-chamber 202 is increased, so that the pressure in the first sub-chamber 201 is greater than the pressure in the second sub-chamber 202, thereby causing the fluid to be filtered in the first sub-chamber 201 to flow into the second sub-chamber 202; when the handle 33 is pushed towards the direction of the shell 10, the piston 31 applies pressure to the fluid in the second sub-chamber 202 to pressurize the fluid, and at the same time, the fluid is introduced into the second chamber 21. At the same time, the leather cup is configured to prevent the fluid in the second sub-chamber 202 from flowing into the first sub-chamber 201.
[0033] Therefore, the skin bowl is configured to flow from the first sub-chamber 201 to the second sub-chamber 202 when the pressure of the first sub-chamber 201 is greater than that of the second sub-chamber 202, and when the connecting rod 32 reciprocates, the fluid in the second sub-chamber 202 can be prevented from flowing into the first sub-chamber 201, thereby improving the sealing performance of the piston 31. In addition, since the skin bowl is a rubber part, when the piston 31 reciprocates and contacts the inner side wall of the shell 10, the wear resistance and corrosion resistance of the piston 31 are improved, thereby prolonging the service life of the piston 31 and the service life of the filter device 100, and reducing the production cost.
[0034] According to some embodiments of the present application, the piston 31 is provided with a one-way valve, and the one-way valve communicates the first sub-chamber 201 and the second sub-chamber 202. The one-way valve is configured to flow from the first sub-chamber 201 to the second sub-chamber 202 when the pressure of the first sub-chamber 201 is greater than that of the second sub-chamber 202.
[0035] That is, the one-way valve is arranged between the first sub-chamber 201 and the second sub-chamber 202, and the one-way valve is adapted to prevent the fluid in the second sub-chamber 202 from flowing reversely into the first sub-chamber 201. When the operator pulls the handle 33 away from the shell 10, the one-way valve is opened, and the fluid in the first sub-chamber 201 enters the second sub-chamber 202. When the handle 33 is pushed towards the shell 10, the one-way valve is closed. In this embodiment, the one-way valve can be threadedly connected or plate-connected with the piston 31.
[0036] Therefore, by arranging the one-way valve on the piston 31, the flow direction of the fluid in the shell 10 can be effectively controlled, and the fluid in the second sub-chamber 202 can be prevented from flowing reversely into the first sub-chamber 201, thereby realizing the rapid response of the filter device 100 and improving the safety and reliability of the filter device 100. In addition, since the shape and size of the one-way valve are small, the installation of the one-way valve can be facilitated, and the assembly efficiency of the filter device 100 can be improved.
[0037] According to some embodiments of the present application, as shown in Figure 1 The filter device 100 further comprises a first one-way valve 40, and the first one-way valve 40 communicates the first sub-chamber 201 and the outside of the shell 10. The first one-way valve 40 is configured to flow from the outside of the shell 10 to the first sub-chamber 201 when the pressure of the first sub-chamber 201 is less than that of the outside of the shell 10.
[0038] That is, the first one-way valve 40 is arranged on the side of the shell 10 adjacent to the handle 33 along the axial direction of the first chamber 20, and the first one-way valve 40 is adapted to guide the fluid outside the shell 10 into the first sub-chamber 201, when the operator pushes the handle 33 in the direction of the shell 10, the volume of the first sub-chamber 201 increases, and the air pressure in the first sub-chamber 201 decreases, at this time, the first one-way valve 40 is opened, and the fluid outside the shell 10 enters the first sub-chamber 201 through the first one-way valve 40 until the air pressure in the first sub-chamber 201 is the same as the air pressure outside the shell 10. In the embodiment, the fluid is air.
[0039] Therefore, the filter device 100 is provided with the first one-way valve 40, and the first one-way valve 40 communicates the first sub-chamber 201 and the outside of the shell 10, so that the air pressure in the first sub-chamber 201 can be maintained to be the same as the air pressure outside the shell 10, and when the air pressure in the first sub-chamber 201 decreases, the pressure difference between the first sub-chamber 201 and the outside of the shell 10 can be prevented from being too large, so as to ensure the smooth movement of the movable assembly 30 along the axial direction of the shell 10, avoid the stress concentration of the shell 10, and improve the reliability and stability of the filter device 100.
[0040] According to some embodiments of the present application, as shown in Figure 1 The filter device 100 further comprises a second one-way valve 41, the second one-way valve 41 communicates the second sub-chamber 202 and the second chamber 21, and the second one-way valve 41 is configured to allow the fluid to flow from the second sub-chamber 202 to the second chamber 21 when the pressure in the second sub-chamber 202 is greater than the pressure in the second chamber 21.
[0041] That is, the second one-way valve 41 is arranged between the second sub-chamber 202 and the second chamber 21, and the second one-way valve 41 is adapted to guide the fluid in the second sub-chamber 202 into the second chamber 21, when the operator pulls the handle 33 in the direction away from the shell 10, the volume of the second sub-chamber 202 decreases, and the pressure in the second sub-chamber 202 increases, at this time, the second one-way valve 41 is opened, and the fluid in the second sub-chamber 202 after being pressurized enters the second chamber 21 through the second one-way valve 41.
[0042] Therefore, the filter device 100 is provided with the second one-way valve 41, and the second one-way valve 41 communicates the second sub-chamber 202 and the second chamber 21, when the operator pulls the handle 33 in the direction away from the shell 10, the fluid in the second chamber 21 can be prevented from flowing back to the second sub-chamber 202 due to the decrease of the pressure in the second sub-chamber 202, so as to effectively improve the reliability and sealing performance of the filter device 100.
[0043] According to some embodiments of the present application, as shown in Figure 1 and Figure 2As shown, the filter device 100 further comprises a filter element 50 arranged in the second chamber 21, and a sealing element 53 arranged between the filter element 50 and the side wall of the second chamber 21, the sealing element 53 divides the second chamber 21 into a third sub-chamber 211 and a fourth sub-chamber 212, the third sub-chamber 211 is arranged adjacent to the second sub-chamber 202, one end of the filter element 50 is arranged in the third sub-chamber 211, and the other end of the filter element 50 is arranged in the fourth sub-chamber 212.
[0044] That is, the filter element 50 is arranged along the axial direction of the second chamber 21, and the filter element 50 is adapted to filter the fluid in the second chamber 21; the sealing element 53 is arranged between the filter element 50 and the side wall of the second chamber 21 along the circumferential direction of the filter element 50, and the sealing element 53 defines the third sub-chamber 211 with the second chamber 21 adjacent to one side of the second sub-chamber 202, and defines the fourth sub-chamber 212 with the second chamber 21 away from the other side of the second sub-chamber 202. In this embodiment, the sealing element 53 can be a leather cup, which is configured to allow the fluid to flow from the third sub-chamber 211 to the fourth sub-chamber 212.
[0045] Therefore, the filter element 50 is arranged in the second chamber 21, and the sealing element 53 is arranged between the filter element 50 and the side wall of the second chamber 21, which can facilitate the fluid in the third sub-chamber 211 to enter the fourth sub-chamber 212 through the sealing element 53, and at the same time, prevent the fluid in the fourth sub-chamber 212 from flowing back to the third sub-chamber 211, thereby improving the sealing performance of the second chamber 21, and improving the sealing performance and working efficiency of the filter device 100.
[0046] According to some embodiments of the present application, Figure 1 As shown, the filter element 50 is formed with a first passage 51 and a second passage 52, the second passage 52 is arranged on the outer circumferential side of the first passage 51, the first passage 51 and the second passage 52 are in communication along the radial direction of the filter element 50, and one end of the second passage 52 is in communication with the third sub-chamber 211; the housing 10 is formed with a first outlet 54 and a second outlet 55, the first outlet 54 and the second outlet 55 are arranged in a spaced manner, the first outlet 54 is in communication with the first passage 51, and the second outlet 55 is in communication with the second passage 52.
[0047] That is, the first channel 51 extends along the axial direction of the second chamber 21, the second channel 52 is arranged between the filter element 50 and the inner side wall of the fourth sub-chamber 212 along the circumferential direction of the filter element 50, the first outlet 54 and the second outlet 55 are arranged on the side of the shell 10 away from the sealing element 53 along the axial direction of the second chamber 21, and the second outlet 55 is arranged below the first outlet 54 along the radial direction of the shell 10, one end of the first channel 51 adjacent to the sealing element 53 is in communication with the third sub-chamber 211, the other end of the first channel 51 away from the sealing element 53 is in communication with the first outlet 54, and one end of the second channel 52 adjacent to the sealing element 53 is connected with the sealing element 53, and the other end of the second channel 52 away from the sealing element 53 is in communication with the second outlet 55.
[0048] Therefore, the filter element 50 is formed with the first channel 51 and the second channel 52, the second channel 52 is arranged on the outer circumferential side of the first channel 51, the first outlet 54 is in communication with the first channel 51, the second outlet 55 is in communication with the second channel 52, the fluid enters the fourth sub-chamber 212 through the sealing element 53, the pure water filtered by the filter element 50 is collected in the first channel 51 and flows out from the first outlet 54, and the waste water filtered by the filter element 50 is collected in the second channel 52 and flows out from the second outlet 55, so that the filtration device 100 can conveniently distinguish the pure water and the waste water, and the practicability of the filtration device 100 is improved.
[0049] According to some embodiments of the present application, the filter element 50 is a reverse osmosis membrane filter element.
[0050] The reverse osmosis membrane filter element is also called RO (Reverse Osmosis) membrane filter element, and the fluid after being pressurized can separate water molecules and mineral ions in the water to be filtered from other impurities under pressure to achieve the filtration of the fluid. The reverse osmosis membrane filter element has the advantages of high efficiency separation, high durability, energy saving and environmental protection, high filtration precision, simple operation and the like. Therefore, the filter element 50 is a reverse osmosis membrane filter element, which can effectively remove various pollutants and impurities such as dissolved solids, salts, organic matter, heavy metals and microorganisms in water, and achieve high efficiency separation effect under low operating pressure, thereby saving energy cost and reducing environmental impact. At the same time, the reverse osmosis membrane filter element has good durability, which can prolong the service life of the filtration device 100 and reduce the maintenance cost of the filtration device 100.
[0051] According to some embodiments of the present application, as shown in Figure 1 The shell 10 comprises a first shell 11, a second shell 12 and a mounting seat 13, the first shell 11 is formed with the first chamber 20, the second shell 12 is formed with the second chamber 21, and the mounting seat 13 is formed with the third chamber 131, the first shell 11 and the second shell 12 are connected with the mounting seat 13 respectively, and the first chamber 20 and the second chamber 21 are in communication through the third chamber 131.
[0052] Namely, the first shell 11 and the second shell 12 are both axially extended along the shell 10, and the first shell 11 and the second shell 12 are spaced apart, one end of the mounting seat 13 is connected with the first shell 11 away from the handle 33, the other end of the mounting seat 13 away from the first shell 11 is connected with the second shell 12 away from the first outlet 54 along the radial direction of the shell 10, the third cavity 131 of the mounting seat 13 is communicated with the second sub-cavity 202 and the third sub-cavity 211, and the second one-way valve 41 is arranged on the mounting seat 13.
[0053] Therefore, the mounting seat 13 is formed with the third cavity 131, and the first shell 11 and the second shell 12 are respectively connected with the mounting seat 13, so that the fluid pressurized in the second sub-cavity 202 can enter the third sub-cavity 211 through the second one-way valve 41, the communication between the first cavity 20 of the first shell 11 and the second cavity 21 of the second shell 12 is improved, and the fluid in the second cavity 21 is prevented from flowing back to the first cavity 20, and meanwhile, the mounting seat 13 can facilitate the placement of the filter device 100 and improve the stability of the filter device 100 during operation.
[0054] According to some embodiments of the utility model, as shown in Figure 1 The first shell 11 is formed with a water inlet 111, and the water inlet 111 is communicated with the first sub-cavity 201.
[0055] That is, the water inlet 111 is formed on the side of the first shell 11 adjacent to the handle 33, and the water inlet 111 is suitable for guiding the fluid to be filtered into the first sub-chamber 201. In this embodiment, the first sub-chamber 201 is first filled with the fluid to be filtered through the water inlet 111, the water inlet 111 is closed, then the handle 33 is pulled along the axial direction of the first shell 11 away from the first shell 11, the connecting rod 32 drives the piston 31 to move towards the water inlet 111, so that the fluid in the first sub-chamber 201 enters the second sub-chamber 202 through the piston 31, and then the handle 33 is pushed along the axial direction of the first shell 11 towards the first shell 11, the first one-way valve 40 is opened, the air outside the shell 10 enters the first sub-chamber 201 through the first one-way valve 40, so that the air pressure in the first sub-chamber 201 is the same as the air pressure outside the shell 10, the connecting rod 32 drives the piston 31 to move away from the water inlet 111, so that the fluid pressure in the second sub-chamber 202 increases, the second one-way valve 41 is opened, and the fluid in the second sub-chamber 202 enters the third sub-chamber 211 through the second one-way valve 41, then the fluid in the third sub-chamber 211 enters the filter element 50 in the fourth sub-chamber 212 through the sealing element 53, the purified water filtered by the filter element 50 is collected to the first channel 51 and flows out from the first outlet 54, and the waste water filtered by the filter element 50 is collected to the second channel 52 and flows out from the second outlet 55, so that the fluid is filtered in the environment without electricity, the purified water is obtained, the energy consumption of the filtering device 100 is effectively reduced, and the reliability of the filtering device 100 is improved.
[0056] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation on the utility model.
[0057] In the description of the utility model, "first feature", "second feature" can include one or more features. In the description of the utility model, "multiple" means two or more. In the description of the utility model, "above" or "below" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. In the description of the utility model, "above", "above" and "above" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.
[0058] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.
[0059] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.
Claims
1. A filter device, characterized in that Comprising: a housing, the housing being formed with a first chamber and a second chamber, the first chamber and the second chamber being configured to allow fluid to flow from the first chamber to the second chamber; a movable assembly, the movable assembly comprising a connecting rod and a piston, the piston being connected to the connecting rod, the piston dividing the first chamber into a first sub-chamber and a second sub-chamber, the connecting rod driving the piston to move between the first sub-chamber and the second sub-chamber, the first sub-chamber and the second sub-chamber being configured to allow fluid to flow from the first sub-chamber to the second sub-chamber when the pressure in the first sub-chamber is greater than the pressure in the second sub-chamber.
2. The filter device of claim 1, wherein, The piston is a cup-shaped piston, the cup-shaped piston being configured to allow fluid to flow from the first sub-chamber to the second sub-chamber when the pressure in the first sub-chamber is greater than the pressure in the second sub-chamber.
3. The filter device of claim 1, wherein, A one-way valve is provided on the piston, the one-way valve being in communication with the first sub-chamber and the second sub-chamber; The one-way valve is configured to allow fluid to flow from the first sub-chamber to the second sub-chamber when the pressure in the first sub-chamber is greater than the pressure in the second sub-chamber.
4. The filter device of claim 1, wherein, Further comprising: a first one-way valve, the first one-way valve being in communication with the first sub-chamber and the outside of the housing, the first one-way valve being configured to allow fluid to flow from the outside of the housing to the first sub-chamber when the pressure in the first sub-chamber is less than the pressure outside the housing.
5. The filter device of claim 1, wherein, Further comprising: a second one-way valve, the second one-way valve being in communication with the second sub-chamber and the second chamber, the second one-way valve being configured to allow fluid to flow from the second sub-chamber to the second chamber when the pressure in the second sub-chamber is greater than the pressure in the second chamber.
6. The filter device of claim 5, wherein, Further comprising: a filter element, the filter element being provided in the second chamber; a sealing member, the sealing member being provided between the filter element and a side wall of the second chamber, the sealing member dividing the second chamber into a third sub-chamber and a fourth sub-chamber, the third sub-chamber being adjacent to the second sub-chamber, one end of the filter element being provided in the third sub-chamber, the other end of the filter element being provided in the fourth sub-chamber.
7. The filter device of claim 6, wherein, The filter element is formed with a first passage and a second passage, the second passage being provided on the outer circumferential side of the first passage, the first passage and the second passage being in communication along the radial direction of the filter element, one end of the second passage being in communication with the third sub-chamber; The housing is formed with a first outlet and a second outlet, the first outlet and the second outlet being spaced apart, the first outlet being in communication with the first passage, the second outlet being in communication with the second passage.
8. The filter device of claim 6, wherein, The filter element is a reverse osmosis membrane filter element.
9. The filter device according to any one of claims 1-8, characterized in that, The housing comprises: a first housing, the first housing being formed with a first chamber; a second housing, the second housing being formed with a second chamber; a mounting seat, the mounting seat being formed with a third chamber, the first housing and the second housing being connected to the mounting seat respectively, the first chamber and the second chamber being in communication through the third chamber.
10. The filter device of claim 9, wherein, A water inlet is formed on the first housing, the water inlet being in communication with the first sub-chamber.