Pre-filter and water system

Abstract

The utility model discloses a pre-filter and a water system, and relates to the technical field of pre-filters, the pre-filter is characterized in that an impeller assembly is additionally arranged in a filter bottle, and the impeller assembly comprises a mounting seat and an impeller body rotatably arranged in an impeller cavity of the mounting seat; the mounting seat is hermetically connected with the filter bottle; the mounting seat is provided with a first water inlet and a second water inlet which are communicated with the impeller cavity and the water filtering cavity, and when the drainage valve is opened, water enters the impeller cavity through the first water inlet and the second water inlet in the mounting seat. In the impeller cavity, the impeller body rotates under the impact of water flow, so that impurities and residues in water can be gathered together. And finally, waste water containing impurities is discharged out of the filter bottle through a water outlet in the mounting seat, so that the water purification and pollution discharge processes are realized.

Description

Technical Field

[0001] This utility model relates to the field of pre-filter technology, and in particular to a pre-filter and a water system. Background Technology

[0002] Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to remove large particles that have been intercepted, thereby extending the service life of the pre-filter. However, the flushing effect is currently weak, and sediment may clog the drain outlet during the drainage process. Utility Model Content

[0003] The main purpose of this invention is to provide a pre-filter and a water system using the pre-filter. The pre-filter can improve the flushing efficiency and the drainage efficiency of the pre-filter, thus promoting the discharge of impurities.

[0004] To achieve the above objectives, the present invention proposes a pre-filter comprising a filter bottle and an impeller assembly. The filter bottle has a water filtration chamber and a drain port communicating with the water filtration chamber. The impeller assembly includes a mounting base and an impeller body rotatably disposed within the impeller chamber of the mounting base. The mounting base is sealed to the filter bottle. Each mounting base is provided with a first water inlet and a second water inlet communicating with the impeller chamber and the water filtration chamber. The mounting base is also provided with a drain port communicating with the impeller chamber and the drain port.

[0005] In one embodiment, a sealing element is provided between the mounting base and the filter bottle, with different sides of the sealing element abutting against the mounting base and the filter bottle respectively.

[0006] In one embodiment, the seal is configured as a sealing ring, the inner circumferential side of the sealing ring abutting against the mounting base, and the outer circumferential side of the sealing ring abutting against the filter bottle.

[0007] In one embodiment, the impeller body includes an impeller shaft and a plurality of blades inclinedly disposed on the impeller shaft, wherein water flow from both the first inlet and the second inlet can cause the blades to drive the impeller shaft to rotate.

[0008] In one embodiment, the blade is inclined along the axial direction of the impeller shaft, and the end away from the impeller shaft is bent in both the circumferential and axial directions, and at least a portion of the blade corresponds to the first inlet and the second inlet.

[0009] In one embodiment, the mounting base includes a first housing and a second housing that are detachably connected, the second housing covering the first housing to form the impeller cavity, the first housing having a flange protruding from its outer peripheral side, and the sealing groove being disposed on the flange;

[0010] The first water inlet is located at the top of the first housing; the second water inlet is located on the periphery of the first housing, and a water inlet channel is formed between the periphery of the first housing, the flange and the filter bottle, and the water inlet channel connects the water filter chamber and the second water inlet.

[0011] In one embodiment, the peripheral surface of the flange is adapted to the contour of the inner wall surface of the filter bottle.

[0012] In one embodiment, the first water inlets are all inclined circumferentially from the top of the first housing toward the bottom of the mounting base.

[0013] In one embodiment, a plurality of second water inlets are provided at intervals around the periphery of the mounting base, and the number of water inlets corresponds to the number of second water inlets.

[0014] In one embodiment, the opening of the second water inlet is provided with a water guiding slope along the inflow direction of the water flow.

[0015] In one embodiment, the first housing is fitted with the second housing. The inner side of the first housing is provided with a hook, and the outer side of the second housing is provided with a slot. The second housing is embedded and fixed to the first housing by engaging with the hook and the slot.

[0016] This utility model also proposes a water system, including a pre-filter as described above.

[0017] In this invention, the pre-filter allows water to enter the impeller chamber through the first and second inlets on the mounting base when the drain valve is opened. Within the impeller chamber, the impact of the water flow causes the impeller to rotate, further propelling the water and generating centrifugal force. This rotation helps to collect impurities and residues in the water. Finally, the wastewater containing impurities is discharged from the filter bottle through the drain outlet on the mounting base, achieving both water purification and wastewater discharge. Furthermore, the swirling flow effectively prevents clogging of the filter media, maintaining unobstructed water flow and preserving the pre-filter's filtration efficiency. This is crucial for maintaining stable water pressure and clean water quality in residential or commercial systems. Moreover, by improving flushing efficiency and reducing water waste, the impeller assembly design contributes to a more environmentally friendly and energy-efficient filtration system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the pre-filter provided by this utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of an embodiment of the intermediate impeller assembly;

[0021] Figure 3 for Figure 1 A structural schematic diagram of the middle impeller assembly from another perspective;

[0022] Figure 4 for Figure 1 Exploded view of the mounting base;

[0023] Figure 5 A schematic diagram of a structure of one embodiment of the second housing and the impeller body;

[0024] Figure 6 for Figure 5 A schematic diagram of the structure of one embodiment of the second housing;

[0025] Figure 7 for Figure 5 A schematic diagram of the structure of one embodiment of the intermediate impeller body;

[0026] Figure 8 This is a cross-sectional structural diagram of an embodiment of the impeller assembly.

[0027] Explanation of icon numbers:

[0028] 10. Filter bottle; 101. Filter chamber; 102. Drain outlet;

[0029] 20. Valve head; 201. Inlet; 202. Outlet;

[0030] 30. Filter assembly; 40. Impeller assembly; 410. Mounting base; 401. Impeller cavity; 402. First inlet; 403. Second inlet; 404. Drain outlet; 405. Water inlet channel; 420. First housing; 421. Flange; 422. Sealing groove; 423. Hook; 430. Second housing; 431. Impeller shaft seat; 432. Partition opening; 433. Slot; 434. Skirt; 435. Water guide slope; 440. Impeller body; 441. Impeller shaft; 442. Blade.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to remove large particles that have been intercepted, thereby improving the service life of the pre-filter. Currently, most of them use direct flushing, which has the problem of weak flushing effect and the possibility of sediment clogging the drain outlet during drainage.

[0036] Therefore, this utility model proposes a pre-filter and a water system using the pre-filter. The pre-filter can improve the flushing efficiency and the drainage efficiency of the pre-filter, thus promoting the discharge of impurities.

[0037] Water systems, such as whole-house water purification systems, typically include a pre-filter. This pre-filter filters out large particles from tap water, ensuring water safety, extending the lifespan of appliances, preventing pipe blockages, and improving residents' health. The pre-filter is the first stage of coarse filtration in a whole-house water purification system. It usually contains a stainless steel filter screen and is a physical filtration device primarily used to intercept large particles larger than 40 microns, protecting downstream water safety.

[0038] Please see Figure 1 A pre-filter typically includes a valve head 20, a filter bottle 10, and a filter assembly 30. Please refer to the following: Figures 2 to 8 In one embodiment of this utility model, the pre-filter further includes an impeller assembly 40. In other embodiments, the pre-filter further includes an outer frame, a water distributor disposed on the filter assembly 30, etc.

[0039] The filter bottle 10 has a water filtration chamber 101 and a drain port 102 communicating with the water filtration chamber 101. The valve head 20 has an inlet 201 and an outlet 202 communicating with the water filtration chamber 101. The inlet 201 is connected to the water supply end, and the outlet 202 is connected to the water user end. "It should be noted that the water supply end can be a tap water pipe, a water tower, or well water, and the water user end can be a faucet, a shower head, or a drinking water outlet. This application does not make specific limitations in this regard."

[0040] The pre-filter is equipped with a filter element 30. The form and structure of the filter element 30 are not limited. The filter element 30 can be a stainless steel filter screen or a PP cotton filter screen. When water flows through it, these filter screens can intercept large particles of impurities in the water and remove some sediment, rust, sand, bacteria and other particulate impurities generated in the pipes. It provides good protection for water purifiers, washing machines, shower heads, high-end faucets, downstream pipes and other equipment, reducing the risk of damage to these devices due to blockage by impurities.

[0041] Pre-filters are typically T-shaped, with the top horizontal section containing the inlet and outlet ports 202 on the left and right, the bottom vertical section containing the main body and internal cylindrical filter assembly 30, and the bottommost section containing the drain port 102. A valve controls the opening and closing of the filter.

[0042] The valve head 20 is typically made of copper alloy. The connection between the valve head 20 and the filter bottle 10 is primarily a threaded connection. For example, the valve head 20 has a protruding external threaded tube, and the bottle mouth of the filter bottle 10 has a corresponding internal thread for threading the external threaded tube. To reduce the manufacturing difficulty of the pre-filter, lower the testing requirements for its assembly results, and reduce the material cost of the valve head 20, in this embodiment, the filter bottle 10 and the valve head 20 are connected by splicing and then locking with fasteners.

[0043] Please see Figures 1 to 3 The impeller assembly 40 is arranged in the water filtration chamber 101, located below the filter assembly 30. The impeller assembly 40 includes a mounting base 410 and an impeller body 440 rotatably disposed in the impeller chamber 401 of the mounting base 410. The mounting base 410 is sealed to the filter bottle 10. The mounting base 410 is provided with a first water inlet 402 and a second water inlet 403 that connect the impeller chamber 401 and the water filtration chamber 101. The mounting base 410 is also provided with a drain outlet 404 that connects the impeller chamber 401 and the drain outlet 102. Water in the filter bottle 10 is discharged from the drain outlet 102 through the drain outlet 404.

[0044] In this invention, when the drain valve is opened, water flows into the impeller chamber 401 through the two inlets of the impeller assembly 40, causing the impeller body 440 to rotate under the impact of the water flow. This rotational motion generates a vortex effect, resulting in stronger agitation of the water flow inside the filter bottle 10, thus more effectively removing impurities and dirt adhering to the surface of the filter media. Compared to static water flow, the dynamic cleaning of the impeller assembly 40 significantly improves the efficiency and effectiveness of rinsing. Furthermore, the rotational motion of the impeller agitates the impurities and dirt inside the filter bottle 10, suspending them in the water. These impurities are then discharged from the filter bottle 10 through the drain port 404 and the drain valve, preventing them from redepositing on the filter media and ensuring the thoroughness of the rinsing process. Additionally, by enhancing the rinsing effect, the impeller assembly 40 effectively prevents clogging of the filter media, maintains unobstructed water flow, and preserves the filtration efficiency of the pre-filter. This is crucial for maintaining stable water pressure and clean water quality in residential or commercial systems. Moreover, by improving flushing efficiency and reducing water waste, the design of the impeller assembly 40 helps to achieve a more environmentally friendly and energy-efficient filtration system.

[0045] Common methods for flushing pre-filters include the following: direct flushing mode and backflushing mode. In direct flushing mode, water flows along the direction of tap water to flush the dirt-collecting surface of the filter element 30, washing away particulate impurities on the filter screen with the water flow. Backflushing mode involves reverse water flow flushing, where tap water pressure penetrates from the inner wall of the filter screen to the outer wall, forming a high-velocity water column that washes away particulate impurities on the filter screen from the inside out.

[0046] Impeller assembly 40 can be used in both direct flush and backflush modes. Impeller assembly 40 can also be used in siphon mode. Siphon mode usually involves adding an outer frame to the pre-filter. The outer frame is equipped with a siphon flow channel, and the suction generated by the siphon principle helps to remove impurities accumulated on the filter screen.

[0047] The sealed connection between the impeller assembly 40 and the filter bottle 10 ensures the system's airtightness, preventing inconvenience during use such as water leakage. In this embodiment, a sealing element is provided between the mounting base 410 and the filter bottle 10, with different sides of the sealing element abutting against the mounting base 410 and the filter bottle 10 respectively, achieving a seal between them. In this embodiment, the sealing element is configured as a sealing ring, with the inner circumference of the sealing ring abutting against the mounting base 410 and the outer circumference of the sealing ring abutting against the filter bottle 10. In other embodiments, the sealing element can also be a gasket, sealing strip, water seal, sealant, soft filler, etc.

[0048] Please see Figures 1 to 3 To facilitate the installation of the sealing ring, a sealing groove 422 is provided on the periphery of the mounting base 410. The sealing ring is installed in the sealing groove 422. The material of the sealing ring is a rubber suitable for drinking water or hot water, such as natural rubber, silicone rubber, etc.

[0049] This utility model also improves the structural form of the mounting base 410.

[0050] Please see Figures 3 to 8 The mounting base 410 includes a first housing 420 and a second housing 430 that are detachably connected. The second housing 430 covers the first housing 420 to form an impeller cavity 401. The first housing 420 has a flange 421 protruding from its outer periphery, and a sealing groove 422 is provided on the flange 421. A first water inlet 402 is provided on the top of the first housing 420. A second water inlet 403 is provided on the periphery of the first housing 420. A water inlet channel 405 is formed between the periphery of the first housing 420 and the cavity wall of the filter cavity 101. The water inlet channel 405 connects the filter cavity 101 and the second water inlet 403.

[0051] Please see Figure 4 The mounting base 410 consists of a first housing 420 and a second housing 430, which are tightly connected by a detachable connection method (such as threaded connection, snap-fit ​​connection, bolt fixing, etc.) to form a sealed impeller cavity 401, making the maintenance, cleaning and replacement of the impeller assembly 40 more convenient. For a secure connection and easy tool-free disassembly, the first housing 420 and the second housing 430 are snap-fitted together.

[0052] The first housing 420 is sealed to the cavity wall of the filter bottle 10 by the sealing ring in the sealing groove 422 on the outer peripheral flange 421. In order to improve the sealing effect, the peripheral surface of the flange 421 is adapted to the contour of the inner wall surface of the filter bottle 10. The contour of the cavity wall of the filter bottle 10 is arc-shaped. In order to ensure a tight fit and further improve the sealing effect, the contour of the flange 421 is adapted to the contour of the cavity wall of the filter bottle 10.

[0053] The first inlet 402 and the second inlet 403 provided on the first housing 420 are key channels for water to enter the impeller cavity 401. The position and size of these inlets are carefully designed to ensure that the water can enter the impeller cavity 401 evenly and efficiently, and interact effectively with the rotating impeller body 440.

[0054] Please see Figure 2 and Figure 3 In order to facilitate the smooth flow of water from the filter chamber 101 into the impeller assembly 40 after the vortex is produced, the first housing 420 is provided with a plurality of second inlets 403 with the same circumferential opening at intervals on its periphery; the second inlets 403 are provided with a water guide slope 435 along the water flow direction; the first housing 420 is also provided with a water inlet channel 405 on its periphery, which connects the second inlets 403 and the filter chamber 101 of the pre-filter.

[0055] In this embodiment, two second inlets 403 are provided, extending circumferentially. The flow cross-sections of the two inlet channels 405 decrease in the direction away from the second inlets 403. To improve the driving effect on the impeller body 440 after water intake, the second inlets 403 are provided with a guide slope 435 along the water inflow direction, allowing the water to enter the impeller cavity 401 at a certain angle. The guide slope 435 can also increase the kinetic energy of the water flow to a certain extent, enabling it to interact more effectively with the impeller assembly 40 after entering the impeller cavity 401, thereby improving the sewage discharge effect.

[0056] Furthermore, the flow cross-section of the water inlet channel 405 decreases in the direction away from the second inlet 403 (in some embodiments, the inlet of the water inlet channel 405 is Z-shaped, and the overall cross-section gradually decreases in the direction away from the second inlet 403). This design can generate the Venturi effect, that is, as the water flows through the gradually decreasing cross-section, the flow velocity increases and the pressure decreases. Such a change in flow velocity helps to enhance the scouring force of the water flow, making it easier for impurities in the filter chamber 101 to be carried into the impeller assembly 40 for sewage treatment.

[0057] Please see Figure 3To optimize water flow distribution, multiple first inlets 402 are provided, each inclined circumferentially from the top of the first housing 420 towards its bottom. The circumferential direction can be clockwise or counterclockwise. By providing multiple first inlets 402 at the top of the first housing 420, the water flow path and flow rate into the impeller cavity 401 can be significantly increased. Multiple inlets can distribute water flow more evenly, and the design of the first inlets 402 inclining circumferentially from the top to the bottom helps guide water flow more smoothly into the impeller cavity 401. The inclined inlets utilize gravity and the water flow's own power to make the water flow more smoothly turn and accelerate its entry into the impeller cavity 401. The inclined inlet design also enhances the rotational force and agitation effect of the water flow. When the water flows into the impeller cavity 401 at a certain angle, it interacts more strongly with the rotating impeller body 440, improving the sewage discharge efficiency of the pre-filter impeller assembly 40.

[0058] Please see Figure 5 and Figure 6 To ensure a more secure and flexible installation of the impeller body 440, the second housing 430 is provided with an impeller shaft seat 431 for mounting the impeller body 440. One end of the impeller body 440 is rotatably mounted on the impeller shaft seat 431, and the other end is rotatably mounted on the first housing 420. The second housing 430 has a dedicated impeller shaft seat 431 for mounting the impeller body 440. In one embodiment, one end of the impeller shaft 441 is inserted into the central hole of the impeller shaft seat 431 and secured with appropriate fasteners (such as nuts, snap rings, etc.). Simultaneously, to ensure smooth rotation of the impeller body 440, lubricating components such as bearings are installed between the impeller shaft 441 and the shaft seat.

[0059] In this embodiment, the impeller bearing 431 protrudes from the surface of the second housing 430, and the impeller bearing 431 is provided with a plurality of partition openings 432 recessed downward from the top edge of the impeller bearing along the circumferential direction. The end of the impeller body 440 contacts the end of the impeller bearing 431. The protruding design also helps to disperse the force and vibration generated when the impeller rotates, reducing the direct impact on the second housing 430 and improving the stability and durability of the overall structure.

[0060] Specifically, two adjacent partition openings 432 define impeller support platforms. Four support platforms are provided on the impeller shaft seat 431, each distributed at 90°. The bottom of the impeller body 440 contacts these support platforms, providing upward support to the impeller body 440. The small area of ​​the support platforms reduces the frictional force during impeller body 440 rotation, improving rotational efficiency.

[0061] This utility model also improves the structural form of the impeller body 440.

[0062] Please see Figure 6 and Figure 7 The impeller body 440 includes an impeller shaft 441 and a plurality of blades 442 inclinedly disposed on the impeller shaft 441. Water flow from the first inlet 402 and the second inlet 403 can cause the blades 442 to drive the impeller shaft 441 to rotate. In order to increase the contact area of ​​the impeller with the water flow and improve the driving effect of the impeller, the blades 442 are inclined along the axial direction of the impeller shaft 441, and the end away from the impeller shaft 441 is bent in both the circumferential and axial directions. At least a portion of the blades 442 corresponds to the first inlet 402 and the second inlet 403.

[0063] To improve drainage efficiency, multiple drain ports 404 are located on the second housing 430, surrounding the impeller seat. This arrangement helps to distribute the water discharged from the impeller assembly 40 more evenly to the outside of the pre-filter. When the impeller rotates and pushes the water flow, the water flows circumferentially along the impeller seat and is smoothly discharged through these surrounding drain ports 404. This arrangement reduces water concentration and collision during the discharge process, improving drainage efficiency. All drain ports 404 are inclined; each drain port 404 is designed to be inclined, meaning their opening direction is not completely perpendicular to the surface of the second housing 430, but has a certain angle of inclination. This inclined arrangement helps to guide the water flow more smoothly out of the drain port 404, reducing resistance at the outlet. The multiple drain ports 404 are the same size and / or shape. Designing the multiple drain ports 404 to be identical in size and / or shape helps to maintain consistency and interchangeability. The use of identical drain outlets 404 ensures that each outlet has a similar drainage capacity, thus avoiding problems such as poor drainage or water concentration caused by uneven outlet sizes. Simultaneously, the identical shape of the drain outlets 404 facilitates processing and installation, improving production efficiency and product quality. Specifically, the bottom cover is designed with four elliptical water outlets, each distributed at a 90° angle.

[0064] Please see Figure 3 and Figure 4To ensure the airtightness of the impeller cavity 401 while facilitating the assembly of the first housing 420 and the second housing 430, the first housing 420 is provided with a mounting groove to accommodate the impeller body 440. A hook 423 is provided on the inner periphery of the mounting groove. A groove 433 is provided on the outer periphery of the second housing 430. The second housing 430 is fixed to the first housing 420 by the hooks 423 and the groove 433, thus concealing the mounting groove and forming the impeller cavity 401. The first housing 420 has a dedicated mounting groove for accommodating the impeller body 440. Hooks 423 are designed on the inner periphery of the mounting groove. These hooks 423 are elastic or flexible and are used to engage with the grooves 433 of the second housing 430 to achieve a tight connection between the two.

[0065] The outer periphery of the second housing 430 is provided with a slot 433. Multiple hooks 423 are provided, evenly distributed along the periphery of the mounting slot. These slots 433 correspond to the hooks 423 on the first housing 420, and their number and position are precisely designed to ensure accurate engagement. The shape and depth of the slots 433 are also optimized to form a good fit with the hooks 423, while providing a certain locking force to prevent the second housing 430 from accidentally falling off during use. When it is necessary to fix the second housing 430 to the first housing 420, the user simply aligns the slot 433 of the second housing 430 with the hook 423 of the first housing 420, and gently rotates or presses the second housing 430 so that the hook 423 can smoothly engage in the slot 433. Once the hook 423 is fully engaged and locked in the slot 433, the second housing 430 is securely fixed to the first housing 420 and blocks the opening of the mounting groove, thus forming a closed impeller cavity 401. By blocking the opening of the mounting groove, the second housing 430 effectively prevents water from leaking out of the impeller cavity 401, ensuring the normal operation of the pre-filter. This design eliminates the need for additional fasteners (such as bolts and nuts), reducing production and maintenance costs for users.

[0066] Please see Figure 1 and Figure 8 To further enhance the stability and sealing of the pre-filter impeller assembly 40, a skirt 434 is provided on the periphery of the second housing 430. The skirt 434 abuts against the edge of the mounting groove, that is, against the lower end face of the first housing 420. The skirt 434 and the side wall of the second housing 430 form a step, which abuts against the opening of the mounting groove. The design of the skirt 434 helps to further seal the impeller cavity 401, preventing water or impurities from leaking out from the gap between the impeller cavity 401 and the first and second housings 430. The design of the skirt 434 also makes the appearance of the mounting base 410 neater and more aesthetically pleasing. It covers the connection between the second housing 430 and the first housing 420, making the entire assembly look more unified and harmonious.

[0067] In summary, when the drain valve is opened, water enters the impeller chamber 401 through the first inlet 402 and the second inlet 403 on the mounting base 410. Inside the impeller chamber 401, the impact of the water flow causes the impeller body 440 to rotate, further propelling the water flow and generating centrifugal force. This water flow also helps to collect impurities and residues in the water. Finally, the wastewater containing impurities is discharged from the filter bottle 10 through the drain port 404 on the mounting base 410, thus achieving the water purification and wastewater discharge process.

[0068] This utility model also proposes a water system, which includes the aforementioned pre-filter, the specific structure of which is described below. Figures 1 to 8 Since this water system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0069] The water system includes at least the components from the pre-filter to the water outlet. For example, the water system may include household appliances such as water heaters, dishwashers, and water dispensers, as well as auxiliary components such as water pipes for domestic water use throughout the house.

[0070] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pre-filter, characterized in that, include: A filter bottle having a water filtration chamber and a drain outlet communicating with the water filtration chamber; and An impeller assembly includes a mounting base and an impeller body rotatably disposed within an impeller cavity of the mounting base; the mounting base is sealed to the filter bottle; the mounting base is provided with a first water inlet and a second water inlet that are both connected to the impeller cavity and the filter cavity; the mounting base is also provided with a drain outlet that is connected to the impeller cavity and the drain outlet.

2. The pre-filter as described in claim 1, characterized in that, A sealing element is provided between the mounting base and the filter bottle, and different sides of the sealing element abut against the mounting base and the filter bottle respectively.

3. The pre-filter as described in claim 2, characterized in that, The sealing element is configured as a sealing ring, with the inner circumferential side of the sealing ring abutting against the mounting base and the outer circumferential side of the sealing ring abutting against the filter bottle.

4. The pre-filter as described in claim 1, characterized in that, The impeller body includes an impeller shaft and multiple blades inclinedly arranged on the impeller shaft. Water flow from both the first inlet and the second inlet can cause the blades to drive the impeller shaft to rotate.

5. The pre-filter as described in claim 4, characterized in that, The blades are inclined along the axial direction of the impeller shaft, and the end away from the impeller shaft is bent in both the circumferential and axial directions. At least a portion of the blades corresponds to the first water inlet and the second water inlet.

6. The pre-filter as described in claim 1, characterized in that, The mounting base includes a first housing and a second housing that are detachably connected. The second housing covers the first housing to form the impeller cavity. The first housing has a flange protruding from its outer periphery, and the flange is provided with a sealing groove.

7. The pre-filter as described in claim 6, characterized in that, The first water inlet is located at the top of the first housing; the second water inlet is located on the periphery of the first housing, and a water inlet channel is formed between the periphery of the first housing, the flange and the filter bottle, and the water inlet channel connects the water filter chamber and the second water inlet.

8. The pre-filter as described in claim 7, characterized in that, The peripheral surface of the flange is adapted to the contour of the inner wall surface of the filter bottle.

9. The pre-filter as described in claim 7, characterized in that, The first water inlet is inclined circumferentially from the top of the first housing towards the bottom of the mounting base.

10. The pre-filter as described in claim 7, characterized in that, The second water inlet is provided at intervals around the periphery of the mounting base, and the number of water inlet channels corresponds to the number of the second water inlets.

11. The pre-filter as described in claim 7, characterized in that, The second inlet has a guide slope along the direction of water flow.

12. The pre-filter as described in claim 6, characterized in that, The first housing is fitted with the second housing. The inner side of the first housing is provided with a hook, and the outer side of the second housing is provided with a slot. The second housing is embedded and fixed to the first housing by the hook and the slot engaging.

13. A water supply system, characterized in that, Includes a pre-filter as described in any one of claims 1 to 12.

Images