A pre-filter with double filter elements

Abstract

The application relates to the technical field of water purifiers, in particular to a front-mounted water purifier with double filter elements, which comprises a machine head and a cup cover fixedly connected at the bottom of the machine head, water inlet joints and water outlet joints are symmetrically arranged on the left and right sides of the machine head, further comprises a filter element mechanism, the filter element mechanism is arranged in the interior of the cup cover, the filter element mechanism comprises an inner filter cup and an outer filter cup, and inner filter screens and outer filter screens are arranged on the inner filter cup and the outer filter cup respectively. The application has the inner filter cup, the outer filter cup and an adjusting mechanism for controlling the raw water flow path, according to different water demands of users, the application can perform fine filtration, coarse filtration and no filtration on raw water, so that the water flow speed can be controlled correspondingly according to the water quality requirements of users, and the water use experience of users is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purifiers, in particular to a front-mounted water purifier with double filter elements. BACKGROUND

[0002] The front-mounted water purifier is generally installed at the front end of the pipeline, which can effectively filter out harmful substances such as silt, rust, bacteria, colloids, and macromolecular organic matter in water, and retain minerals and trace elements beneficial to the human body. The water quality after purification meets the national standard for drinking water. At the same time, the front-mounted water purifier can actively protect downstream pipelines, water heaters, washing machines and other water-using electrical appliances.

[0003] Nowadays, the front-mounted water purifier generally includes a head, a cup cover, and a filter element, wherein the head is provided with a water inlet connector and a water outlet connector for connecting to the household water inlet pipeline. The working principle of the front-mounted water purifier is to make the water flow into the inside of the cup cover, then filter through the filter element, and then discharge the purified water from the water outlet connector, which can achieve the effect of filtering the raw water.

[0004] However, although the front-mounted water purifier can filter impurities in water, the filter element itself will hinder the water flow to some extent, reducing the water flow and thus bringing a poor experience to the user. For example, when the user needs to use water to clean household items, the water quality requirement is not high at this time, and the raw water can be used directly, but the installation of the front-mounted water purifier reduces the water flow, thereby reducing the user's water efficiency. For another example, when the user needs to take a shower, since it is not directly for drinking, the requirement for water quality is not high, and the raw water does not need to be filtered to the drinking standard. In view of this, since the water demand at home is different, the requirement for water quality is different, and the existing front-mounted water purifier cannot adjust the filtering degree of the raw water according to the user's demand, therefore, we propose a front-mounted water purifier with double filter elements to solve the above problems. SUMMARY

[0005] The present application aims to provide a front-mounted water purifier with double filter elements to solve the problems raised in the background.

[0006] The present application is achieved by the following technical solutions:

[0007] A front-mounted water purifier with double filter elements, comprising a head and a cup cover fixedly connected to the bottom of the head, the head is symmetrically provided with a water inlet connector and a water outlet connector on the left and right sides, further comprising:

[0008] The filter core mechanism is arranged in the interior of the cup cover, and comprises an inner filter cup and an outer filter cup, wherein the inner filter cup and the outer filter cup are respectively provided with an inner filter screen and an outer filter screen, the gap between the outer filter cup and the cup cover forms a first cavity, the gap between the inner filter cup and the outer filter cup forms a second cavity, and the interior of the inner filter cup forms a third cavity; the water inlet connector is communicated with the first cavity, and the water outlet connector is communicated with the third cavity.

[0009] The adjusting mechanism is movably arranged in the interior of the cup cover, and comprises an inner shielding sleeve and an outer shielding sleeve, wherein the inner shielding sleeve is sleeved on the outer portion of the inner filter cup, and the outer shielding sleeve is sleeved on the outer portion of the outer filter cup.

[0010] The bottom of the cup cover is further provided with a control assembly for driving the adjusting mechanism to rotate, when the adjusting mechanism is rotated to a first state, the water in the first cavity can directly enter the third cavity without passing through the inner filter screen and the outer filter screen; when the adjusting mechanism is rotated to a second state, the water in the first cavity can enter the third cavity only by passing through the outer filter screen; when the adjusting mechanism is rotated to a third state, the water in the first cavity can enter the third cavity by sequentially passing through the outer filter screen and the inner filter screen; and when the adjusting mechanism is rotated to a fourth state, the water in the first cavity can first enter the second cavity, and then enter the third cavity by passing through the outer filter screen.

[0011] Optionally, the inner side of the bottom of the cup cover is provided with a partition plate, the inner filter cup and the outer filter cup are fixedly arranged on the partition plate, the inner filter screen has two pieces, and the two pieces of the inner filter screen are symmetrically distributed on the two sides of the inner filter cup, and the outer filter screen has two pieces, and the two pieces of the outer filter screen are symmetrically distributed on the two sides of the outer filter cup.

[0012] Optionally, the bottom end of the inner shielding sleeve and the bottom end of the outer shielding sleeve are provided with connecting rods, the partition plate is provided with sliding openings through which the connecting rods pass, and the inner shielding sleeve and the outer shielding sleeve are sealingly attached to the upper surface of the partition plate.

[0013] Optionally, the control assembly comprises a positioning disc and a knob, the knob is rotationally arranged on the bottom wall of the cup cover, the positioning disc is fixedly arranged on the top end of the knob, and the bottom end of each connecting rod is fixedly connected to the positioning disc by a bolt.

[0014] Optionally, the top portion of the inner filter cup is provided with a first through hole and a second through hole, and the top portion of the inner shielding sleeve is provided with a first through opening; when the adjusting mechanism is rotated to the first state, the first through opening and the first through hole are aligned, and when the adjusting mechanism is rotated to the second state, the first through opening and the second through hole are aligned.

[0015] Optionally, the top of the outer filter cup is provided with a third through hole and a fourth through hole, and the top of the outer shielding sleeve is provided with a second through hole; when the adjusting mechanism is rotated to the first state, the second through hole and the third through hole are aligned, and when the adjusting mechanism is rotated to the fourth state, the second through hole and the fourth through hole are aligned.

[0016] Optionally, the two sides of the inner shielding sleeve are symmetrically provided with first water inlets, and the two first water inlets correspond to the two inner filter screens respectively; when the adjusting mechanism is rotated to the third state, the first water inlet and the corresponding inner filter screen are aligned, and when the adjusting mechanism is rotated to the first state, the second state and the fourth state, the first water inlet and the corresponding inner filter screen are distributed in a staggered manner.

[0017] Optionally, the two sides of the outer shielding sleeve are symmetrically provided with second water inlets, and the two second water inlets correspond to the two outer filter screens respectively; when the adjusting mechanism is rotated to the first state, the second water inlet and the corresponding outer filter screen are distributed in a staggered manner, and when the adjusting mechanism is rotated to the second state, the third state and the fourth state, the two second water inlets and the corresponding outer filter screens are aligned and distributed.

[0018] Optionally, the outer shielding sleeve is further provided with a water closing cover, the bottom end of the water closing cover is fixedly connected with the partition plate, the top of the water closing cover is sealingly attached to the outer shielding sleeve, the gap between the water closing cover and the outer shielding sleeve forms a fourth cavity, the side wall of the water closing cover is further provided with a water closing opening, and the outer side wall of the outer shielding sleeve is fixedly connected with a water closing plate matched with the water closing opening; when the adjusting mechanism is rotated to the fourth state, the water closing plate is aligned and attached to the water closing opening.

[0019] Optionally, the top wall of the water closing cover is provided with a water outlet hole, the top wall of the water closing cover is further provided with a water outlet pipe aligned with the water outlet hole, the free end of the water outlet pipe penetrates the outer filter cup and the inner filter cup and extends into the third cavity, the outer shielding sleeve is fixedly provided with a butt joint ring, the butt joint ring is provided with a butt joint hole, and the top surface of the butt joint ring is sealingly attached to the inner top surface of the water closing cover; when the adjusting mechanism is rotated to the fourth state, the butt joint hole and the water outlet hole are aligned and distributed.

[0020] Compared with the prior art, the present application provides a front-mounted water purifier with double filter cartridges, which has the following beneficial effects:

[0021] 1. The present application has an inner filter cup and an outer filter cup and an adjusting mechanism for controlling the flow path of raw water. According to different water requirements of users, the present application can perform fine filtration, coarse filtration and no filtration on raw water, so as to control the water flow rate according to the water quality requirements of users and improve the water experience of users.

[0022] 2. The adjusting mechanism in the application also has a backwash gear position, i.e. allowing raw water to wash the outer filter screen from inside to outside, which can wash down the impurities attached to the outer surface of the coarse filter screen, avoid disassembly and cleaning, and greatly improve the cleaning efficiency of the application;

[0023] 3. The application also has a control assembly, which is arranged at the bottom of the cup cover, and the user can control the adjusting mechanism to be in different gear positions by rotating the control assembly, which is simple and convenient to operate;

[0024] 4. The application has four different gear positions, and only one of the gear positions can be used for the inner filter screen, compared with the prior art, the application can greatly reduce the use frequency of the inner filter screen, thereby helping to protect the inner filter screen and prolong its service life. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural front view of the application;

[0026] Figure 2 It is a structural sectional view of the application;

[0027] Figure 3 It is a cup cover structure schematic diagram of the application;

[0028] Figure 4 It is a sealing plate structure schematic diagram of the application;

[0029] Figure 5 It is a closed water cover structure schematic diagram of the application;

[0030] Figure 6 It is a filter core mechanism schematic diagram of the application;

[0031] Figure 7 It is an adjusting mechanism schematic diagram of the application;

[0032] Figure 8 It is an adjusting mechanism sectional view of the application;

[0033] Figure 9 It is another angle sectional view of the adjusting mechanism of the application;

[0034] Figure 10 It is a partition plate structure schematic diagram of the application;

[0035] Figure 11 It is Figure 2 the enlarged corresponding view at A in the middle;

[0036] Figure 12 It is a first state sectional view of the adjusting mechanism of the application;

[0037] Figure 13 It is a second state sectional view of the adjusting mechanism of the application;

[0038] Figure 14 The third state sectional view of the adjusting mechanism of the present application;

[0039] Figure 15 The fourth state sectional view of the adjusting mechanism of the present application.

[0040] In the figure: 100, head; 101, water inlet joint; 102, water outlet joint; 103, sealing plate; 200, cup cover; 201, partition plate; 202, sliding opening; 203, water closing cover; 204, water closing opening; 205, water outlet hole; 206, water outlet pipe; 300, filter core mechanism; 301, inner filter cup; 302, outer filter cup; 303, inner filter screen; 304, outer filter screen; 305, first through hole; 306, second through hole; 307, third through hole; 308, fourth through hole; 400, adjusting mechanism; 401, inner shielding sleeve; 402, outer shielding sleeve; 403, connecting rod; 404, first through hole; 405, first water inlet; 406, second through hole; 407, second water inlet; 408, water closing plate; 409, abutting ring; 410, abutting hole; 500, control assembly; 501, positioning disc; 502, knob. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0042] Please refer to Figure 1 Figure 15 A front-mounted water purifier with double filter cores, comprising a head 100 and a cup cover 200 fixedly connected at the bottom of the head 100, the head 100 is symmetrically provided with a water inlet joint 101 and a water outlet joint 102 on the left and right sides, further comprising a filter core mechanism 300, the filter core mechanism 300 is arranged in the interior of the cup cover 200, the filter core mechanism 300 comprises an inner filter cup 301 and an outer filter cup 302, the inner filter cup 301 and the outer filter cup 302 are respectively provided with an inner filter screen 303 and an outer filter screen 304, the gap between the outer filter cup 302 and the cup cover 200 constitutes a first cavity, the gap between the inner filter cup 301 and the outer filter cup 302 constitutes a second cavity, the interior of the inner filter cup 301 constitutes a third cavity, the water inlet joint 101 communicates with the first cavity, and the water outlet joint 102 communicates with the third cavity; specifically, the inner diameter of the mesh hole of the outer filter screen 304 is greater than the inner diameter of the mesh hole of the inner filter screen 303, the inner filter screen 303 has two pieces, and the two pieces of the inner filter screen 303 are symmetrically distributed on the two sides of the inner filter cup 301, the outer filter screen 304 has two pieces, and the two pieces of the outer filter screen 304 are symmetrically distributed on the two sides of the outer filter cup 302.

[0043] ​Further, the bottom inner side of the cup cover 200 is provided with a partition plate 201, and the inner filter cup 301 and the outer filter cup 302 are fixedly arranged on the partition plate 201, as shown in FIG. 2. Figure 8 In addition, the head 100 and the cup cover 200 are threadedly connected, and the inner portion of the head 100 is provided with a sealing plate 103. When the cup cover 200 is screwed on the inner bottom side of the head 100, the top end of the cup cover 200 is sealingly attached to the sealing plate 103, and the top ends of the inner filter cup 301 and the outer filter cup 302 are also sealingly attached to the sealing plate 103. The sealing plate 103 is further provided with a first flow-through hole communicating with the first cavity, and a second flow-through hole communicating with the third cavity. The water inlet connector 101 and the water outlet connector 102 are fixedly arranged on the sealing plate 103 and communicate with the first flow-through hole and the second flow-through hole, respectively.

[0044] The embodiment further includes an adjusting mechanism 400 movably arranged in the inner portion of the cup cover 200. The adjusting mechanism 400 includes an inner shielding sleeve 401 and an outer shielding sleeve 402. The inner shielding sleeve 401 is attached to the outer portion of the inner filter cup 301, and the outer shielding sleeve 402 is attached to the outer portion of the outer filter cup 302, as shown in FIG. 2. Figure 8 Specifically, the inner shielding sleeve 401 is sealingly attached to the outer surface of the inner filter cup 301, and the outer shielding sleeve 402 is sealingly attached to the outer surface of the outer filter cup 302. Moreover, the bottom ends of the inner shielding sleeve 401 and the outer shielding sleeve 402 are sealingly attached to the upper surface of the partition plate 201. The bottom ends of the inner shielding sleeve 401 and the outer shielding sleeve 402 are provided with connecting rods 403, and the partition plate 201 is provided with sliding openings 202 through which the connecting rods 403 pass, as shown in FIG. 2. The bottom ends of the connecting rods 403 pass through the sliding openings 202 and extend below the partition plate 201. Figure 10

[0045] Further, the bottom of the cup cover 200 is further provided with a control assembly 500 for driving the adjusting mechanism 400 to rotate. The control assembly 500 includes a positioning disc 501 and a knob 502, as shown in FIG. 2. The knob 502 is rotatably arranged on the bottom wall of the cup cover 200, and the positioning disc 501 is fixedly arranged on the top end of the knob 502. The bottom ends of the connecting rods 403 are fixedly connected to the positioning disc 501 by bolts. Specifically, the knob 502 is rotatably connected to the bottom wall of the cup cover 200 by a bearing. When the knob 502 is rotated by an operator, the inner shielding sleeve 401 and the outer shielding sleeve 402 are simultaneously rotated. Figure 11

[0046] ​​Specifically, when the adjusting mechanism 400 is rotated to the first state, the water in the first cavity can directly enter the third cavity without passing through the inner filter screen 303 and the outer filter screen 304; when the adjusting mechanism 400 is rotated to the second state, the water in the first cavity can enter the third cavity only by passing through the outer filter screen 304; when the adjusting mechanism 400 is rotated to the third state, the water in the first cavity can enter the third cavity by passing through the outer filter screen 304 and the inner filter screen 303 in sequence; and when the adjusting mechanism 400 is rotated to the fourth state, the water in the first cavity can first enter the second cavity, and then enter the third cavity by passing through the outer filter screen 304.

[0047] That is, in the first state, the water flow is directly discharged without filtration, in which state the water flow speed is the fastest, and the state is suitable for the case where the water quality is not required; in the second state, the water flow is discharged after being filtered on one side, in which state the water flow speed is slightly slower, and the state is suitable for the case where the water quality is not required to be high; in the third state, the water flow is discharged after being filtered twice, in which state the water flow speed is the slowest, and the state is suitable for the case where the water quality is required to be high; and in the fourth state, the water flow passes through the outer filter screen 304 from inside to outside, and the state is suitable for cleaning the impurities on the surface of the outer filter screen.

[0048] The state switching of the adjusting mechanism 400 is described below.

[0049] The top of the inner filter cup 301 is provided with a first through hole 305 and a second through hole 306, as shown in Figure 6 , the first through hole 305 and the second through hole 306 are both two, and the top of the inner shielding sleeve 401 is provided with a first through hole 404; when the adjusting mechanism 400 is rotated to the first state, the first through hole 404 and the first through hole 305 are aligned, and when the adjusting mechanism 400 is rotated to the second state, the first through hole 404 and the second through hole 306 are aligned. When the adjusting mechanism 400 is rotated to the third state and the fourth state, the first through hole 404 is not aligned with the first through hole 305 and the second through hole 306.

[0050] In addition, the two sides of the inner shielding sleeve 401 are symmetrically provided with a first water inlet 405, and the two first water inlets 405 are respectively and one-to-one corresponding to the two inner filter screens 303, as shown in Figure 12 ; when the adjusting mechanism 400 is rotated to the third state, the first water inlet 405 and the corresponding inner filter screen 303 are aligned, and when the adjusting mechanism 400 is rotated to the first state, the second state and the fourth state, the first water inlet 405 and the corresponding inner filter screen 303 are all distributed in a staggered manner; that is, only in the third state, the water entering the second cavity will pass through the inner filter screen 303 to enter the third cavity, and in the first state and the second state, the water entering the second cavity will enter the third cavity from the first through hole 305 and the second through hole 306, respectively; and in the fourth state, the first through hole 305, the second through hole 306 and the inner filter screen 303 are all in a closed state.

[0051] On the other hand, the top of the outer filter cup 302 is provided with a third through hole 307 and a fourth through hole 308, as shown, both of which have two, and the top of the outer shielding sleeve 402 is provided with a second through hole 406; when the adjusting mechanism 400 is rotated to the first state, the second through hole 406 and the third through hole 307 are aligned, when the adjusting mechanism 400 is rotated to the fourth state, the second through hole 406 and the fourth through hole 308 are aligned, and when the adjusting mechanism 400 is rotated to the second state and the third state, the second through hole 406 and the third through hole 307 and the fourth through hole 308 are not aligned. Figure 6

[0052] The two sides of the outer shielding sleeve 402 are symmetrically provided with a second water inlet 407, and the two second water inlets 407 are respectively and one-to-one corresponding to the two outer filter screens 304; when the adjusting mechanism 400 is rotated to the first state, the second water inlet 407 and the corresponding outer filter screen 304 are distributed in a staggered manner, and when the adjusting mechanism 400 is rotated to the second state, the third state and the fourth state, the two second water inlets 407 are respectively and correspondingly aligned with the outer filter screen 304. That is, only in the first state, the outer filter screen 304 is in a closed state, and in the remaining states, water flow can pass through the outer filter screen 304.

[0053] It should be noted that when the adjusting mechanism 400 is switched from the first state to the second state, it needs to be counterclockwise rotated by 30°, and when the adjusting mechanism 400 is switched from the second state to the third state, and from the third state to the fourth state, it needs to be rotated by 30° respectively. Specifically, when the adjusting mechanism 400 is in the first state, since the outer filter screen 304 and the inner filter screen 303 are both in a closed state, the water entering the first cavity can pass through the third through hole 307 and the first through hole 305 in turn and enter the third cavity; when the adjusting mechanism 400 is in the second state, the water flow can pass through the outer filter screen 304 into the second cavity, and then pass through the second through hole 306 into the third cavity; when the adjusting mechanism 400 is in the third state, the water flow can pass through the outer filter screen 304 and the inner filter screen 303 in turn into the third cavity.

[0054] ​In another embodiment of the present application, the outer part of the outer shielding sleeve 402 is further sleeved with a water closing cover 203, the bottom end of the water closing cover 203 is fixedly connected with the partition plate 201, the top part of the water closing cover 203 is sealingly attached with the outer shielding sleeve 402, the gap between the water closing cover 203 and the outer shielding sleeve 402 constitutes a fourth cavity, the side wall of the water closing cover 203 is further provided with a water closing opening 204, and the outer side wall of the outer shielding sleeve 402 is fixedly connected with a water closing plate 408 which is adapted to the water closing opening 204; when the adjusting mechanism 400 is rotated to the fourth state, the water closing plate 408 is aligned and attached with the water closing opening 204. That is, when the adjusting mechanism 400 is in the first state, the second state and the third state, the water entering the first cavity can smoothly enter the fourth cavity through the water closing opening 204, and when the adjusting mechanism 400 is in the fourth state, the water flow can enter the second cavity through the fourth through hole 308, and then reversely pass through the outer filter screen 304 to enter the fourth cavity.

[0055] Further, the top wall of the water closing cover 203 is provided with a water outlet hole 205, and the top wall of the water closing cover 203 is further provided with a water outlet pipe 206 which is aligned with the water outlet hole 205, the free end of the water outlet pipe 206 penetrates the outer filter cup 302 and the inner filter cup 301 and extends into the third cavity, the outer part of the outer shielding sleeve 402 is fixedly sleeved with a butt joint ring 409, the butt joint ring 409 is provided with a butt joint hole 410, and the top surface of the butt joint ring 409 is sealingly attached with the inner top surface of the water closing cover 203; when the adjusting mechanism 400 is rotated to the fourth state, the butt joint hole 410 is aligned with the water outlet hole 205. When the adjusting mechanism 400 is in the first state, the second state and the third state, the butt joint hole 410 is always misaligned with the water outlet hole 205, and at this time the water flow cannot enter the water outlet hole 205; and when the adjusting mechanism 400 is in the fourth state, the butt joint hole 410 is just aligned with the water outlet hole 205, and at this time the water entering the fourth cavity can directly enter the third cavity through the water outlet hole 205 and the water outlet pipe 206 to be discharged.

[0056] In summary, the present embodiment can control the rotation of the adjusting mechanism 400 by rotating the knob 502, that is, control the rotation of the inner shielding sleeve 401 and the outer shielding sleeve 402. Specifically, when the adjusting mechanism 400 is in the first state, the water flow enters the first cavity through the water inlet connector 101, then enters the second cavity through the third through hole 307, then enters the third cavity through the first through hole 305, and finally is discharged through the water outlet connector 102.

[0057] When the knob 502 is turned, the control adjustment mechanism 400 is in the second state, at this time, the water entering the first cavity passes through the outer filter screen 304 into the second cavity, and then enters the third cavity through the second through hole 306, and finally is discharged through the water outlet connector 102; when the adjustment mechanism 400 is in the third state, the water entering the first cavity passes through the outer filter screen 304 and the inner filter screen 303 in turn into the third cavity; when the adjustment mechanism 400 is in the fourth state, because the water closing port 204 is in a closed state, at this time, the water entering the first cavity can pass through the fourth through hole 308 into the second cavity, and then reversely pass through the outer filter screen 304 and enter the fourth cavity, and finally enter the third cavity through the water outlet pipe 206.

[0058] It should be noted that the more times the water flow passes through the filter screen, the greater the resistance the water flow receives, and the slower the flow rate. In order to adapt to various different use occasions, the embodiment has four gears, and the four gears correspond to four different uses. In the first state, the water flow is directly discharged without filtration, so the flow rate is the fastest, and it is suitable for occasions without requirements on water quality, such as washing clothes; in the second state, the water flow is filtered once, which is suitable for occasions with certain requirements on water quality, such as washing dishes and vegetables; in the third state, the water flow is filtered twice through coarse filtering and fine filtering, which is suitable for occasions with higher requirements on water quality, such as direct drinking. In the fourth state, the water flow is backwashed from the inside to the outside of the outer filter screen 304, which can wash away the impurities attached to the filter screen.

[0059] Obviously, because the embodiment is in the second state and the third state, the outer filter screen 304 is used, and the water flow always passes through the outer filter screen 304 first, so it is inevitable that the outer filter screen 304 is also the most likely place for impurities to be attached. After a period of use, although the existing pre-filter has a sewage outlet at the bottom, the design of the sewage outlet can only remove the impurities floating inside the filter, and the particles clogging the mesh and the stubborn impurities tightly attached to the outer surface of the filter screen can only be cleaned by disassembling the filter, which is very troublesome.

[0060] Compared with the existing pre-filter, the difference between the embodiment and the existing pre-filter is that when the adjustment mechanism 400 of the embodiment is in the fourth state, the water flow can wash the outer filter screen 304 from the inside to the outside by backwashing, so that the impurities on the outer surface of the outer filter screen 304 are washed away, and the washed impurities can be directly discharged through the faucet at home, without the need to collect sewage with tools, which is simple to operate and convenient to use.

[0061] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0062] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, numerous modifications are possible without departing from the spirit and scope of the present application as delineated by the claims and their equivalents.

Claims

1. A pre-filter water purifier with dual filter elements, comprising a head and a cup cover fixedly connected to the bottom of the head, wherein inlet and outlet connectors are symmetrically arranged on the left and right sides of the head, characterized in that, Also includes: The filter element mechanism is disposed inside the cup cover. The filter element mechanism includes an inner filter cup and an outer filter cup. The inner filter cup and the outer filter cup are respectively provided with an inner filter screen and an outer filter screen. The gap between the outer filter cup and the cup cover forms a first cavity. The gap between the inner filter cup and the outer filter cup forms a second cavity. The interior of the inner filter cup forms a third cavity. The water inlet connector communicates with the first cavity. The water outlet connector communicates with the third cavity. An adjustment mechanism is movably disposed inside the cup cover. The adjustment mechanism includes an inner shielding sleeve and an outer shielding sleeve. The inner shielding sleeve is fitted and sleeved on the outside of the inner filter cup, and the outer shielding sleeve is fitted and sleeved on the outside of the outer filter cup. The bottom of the cup cover is also equipped with a control component for driving the adjustment mechanism to rotate. When the adjustment mechanism is rotated to the first state, the water in the first cavity can directly enter the third cavity without passing through the inner and outer filters. When the adjustment mechanism is rotated to the second state, the water in the first cavity can enter the third cavity only through the outer filter. When the adjustment mechanism is rotated to the third state, the water in the first cavity can pass through the outer and inner filters in sequence to enter the third cavity. When the adjustment mechanism is rotated to the fourth state, the water in the first cavity can first enter the second cavity, then pass through the outer filter and enter the third cavity. The cup cover has a partition on the bottom inner side. The inner filter cup and the outer filter cup are fixedly installed on the partition. There are two inner filter screens, which are symmetrically distributed on both sides of the inner filter cup. There are two outer filter screens, which are symmetrically distributed on both sides of the outer filter cup. The top of the inner filter cup has a first through hole and a second through hole, and the top of the inner shielding sleeve has a first through hole; when the adjustment mechanism is rotated to the first state, the first through hole and the first through hole are aligned; when the adjustment mechanism is rotated to the second state, the first through hole and the second through hole are aligned. The top of the outer filter cup has a third through hole and a fourth through hole, and the top of the outer shielding sleeve has a second through hole; when the adjustment mechanism is rotated to the first state, the second through hole and the third through hole are aligned; when the adjustment mechanism is rotated to the fourth state, the second through hole and the fourth through hole are aligned. The inner shielding sleeve has symmetrical first water inlets on both sides, and the two first water inlets correspond one-to-one with the two inner filter screens; when the adjustment mechanism is rotated to the third state, the first water inlets and the corresponding inner filter screens are aligned; when the adjustment mechanism is rotated to the first state, the second state and the fourth state, the first water inlets and the corresponding inner filter screens are all misaligned. The outer shielding sleeve has symmetrical second water inlets on both sides, and the two second water inlets correspond one-to-one with the two outer filter screens; when the adjustment mechanism is rotated to the first state, the second water inlets and the corresponding outer filter screens are misaligned; when the adjustment mechanism is rotated to the second state, the third state and the fourth state, the two second water inlets and the corresponding outer filter screens are aligned. The outer shield is further fitted with a water-tight cover. The bottom end of the water-tight cover is fixedly connected to the partition plate, and the top of the water-tight cover is sealed and fitted to the outer shield. The gap between the water-tight cover and the outer shield forms a fourth cavity. The side wall of the water-tight cover is also provided with a water-tight opening. A water-tight plate that matches the water-tight opening is fixedly connected to the outer side wall of the outer shield. When the adjustment mechanism is rotated to the fourth state, the water-tight plate is aligned and fitted with the water-tight opening. The top wall of the water-tight cover has a water outlet hole, and the top wall of the water-tight cover also has a water outlet pipe aligned with the water outlet hole. The free end of the water outlet pipe passes through the outer filter cup and the inner filter cup and extends into the third cavity. The outer cover sleeve is fixedly fitted with a docking ring, and the docking ring has a docking hole. The top surface of the docking ring is sealed and fitted to the inner top surface of the water-tight cover. When the adjustment mechanism is rotated to the fourth state, the docking hole is aligned with the water outlet hole.

2. A pre-filter with dual filter elements according to claim 1, characterized in that: Both the inner and outer shielding sleeves are provided with connecting rods at their bottom ends. A sliding opening is provided through the partition for the connecting rods to pass through, and the inner and outer shielding sleeves are sealed and fitted to the upper surface of the partition.

3. A pre-filter with dual filter elements according to claim 2, characterized in that: The control component includes a positioning plate and a knob. The knob is rotatably mounted on the bottom wall of the cup cover, and the positioning plate is fixedly mounted on the top of the knob. The bottom ends of several connecting rods are all fixedly connected to the positioning plate by bolts.

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