Filter with water cut-off function

Abstract

The utility model discloses a filter with a water cut-off function, which comprises a lower casing, an upper casing and a valve core, a filter cartridge is arranged in the lower casing, an inner cavity of the lower casing is divided into a raw water cavity and a purified water cavity by the filter cartridge, the raw water cavity is positioned in the hollow inner part of the filter cartridge, the upper casing is arranged on the lower casing, a cavity is arranged in the upper casing, and the purified water cavity is positioned in the cavity. Compared with the prior art, the filter can be in a filtering state by rotating the valve element, raw water flows into the raw water cavity from the water inlet cavity through the valve element in the filtering state, and after being filtered by the valve element, the raw water flows into the water inlet cavity through the water inlet cavity and then flows into the water outlet cavity through the water outlet channel. Clean water in the water purification cavity flows into the water outlet channel through the valve element, the valve element is rotated to enable the filter to be in a stopping state, and in the stopping state, the water inlet cavity and the raw water cavity are stopped through the valve element, and the water outlet channel and the water purification cavity are stopped through the valve element, so that the overall structure is more compact, the water leakage risk possibly caused by too many connecting points is reduced, and the service life of the water purifier is prolonged. And the operation is simple and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic water filtering equipment technical field especially, it is a filter with water stop function. BACKGROUND

[0002] With people's demand for the quality of life is higher and higher, whole house water purification gradually entered thousands of households, many users will choose to install filter filter on the total water pipe, filter filter can filter the silt, microorganism, microplastic and other impurities in tap water, to improve the water quality of entering the domestic water.

[0003] At present, the filter needs to block the flow between the water flow and the lower shell when replacing the filter element, however, in the prior art, the water stop effect of blocking raw water into the filter and blocking clean water out of the filter is realized by setting a water inlet valve on the water inlet cavity and setting a water outlet valve on the water outlet flow channel, however, this way cannot stably control the residual water in the filter and occupies a large installation space, the user needs to close the two valves in turn to realize the water stop effect, the user operation steps are more complex, the cost is high, the user experience is poor, and the use requirement of the user cannot be met. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a filter with water stop function, which aims to solve at least one of the technical problems in the prior art.

[0005] In order to realize the above-mentioned purpose, the technical scheme of the utility model provides a filter with water stop function, which comprises:

[0006] The lower shell is provided with a filter cartridge in the vertical direction, so as to separate the inner cavity of the lower shell into a raw water cavity and a clean water cavity by the filter cartridge, and the raw water cavity is located in the hollow interior of the filter cartridge;

[0007] The upper shell is provided on the top of the lower shell, the upper shell is provided with a cavity, the outer side of the upper shell is provided with a water inlet cavity and a water outlet flow channel, and the water inlet cavity and the water outlet flow channel are both communicated with the cavity;

[0008] The valve core is rotatably arranged in the cavity, so as to control the communication or block of the water outlet flow channel with the clean water cavity and the communication or block of the water inlet cavity with the raw water cavity by the valve core;

[0009] The filter has a filtering state and a stop state, and the filtering state and the stop state are switched by rotating the valve core. In the filtering state, the inlet water cavity and the raw water cavity are communicated and the clean water cavity and the outlet water channel are communicated by the valve core, so that the raw water in the raw water cavity flows into the clean water cavity after being filtered by the filter cartridge from inside to outside. In the stop state, the inlet water cavity and the raw water cavity are disconnected and the outlet water channel and the clean water cavity are disconnected by the valve core.

[0010] Further, the upper shell comprises an outer shell and a communication valve, a first fluid control plane is formed on the top of the communication valve, and a second fluid control plane is formed on the bottom of the valve core. When the valve core is rotated, the second fluid control plane can be located in a first matching position to make the filter in a filtering state, and the second fluid control plane can be located in a third matching position to make the filter in a stop state.

[0011] Further, the outer side of the upper shell is further provided with a waste water cavity, the waste water cavity is communicated with the cavity, and the filter further has a backwashing state, the filter is switched to the backwashing state by rotating the valve core. In the backwashing state, the raw water cavity and the waste water cavity are communicated, so that the waste water in the clean water cavity flushes the raw water cavity and is discharged from the waste water cavity. The second fluid control plane can be located in a second matching position to make the filter in a backwashing state.

[0012] Further, the valve core comprises:

[0013] A movable valve plate is rotatably arranged in the cavity, and the second fluid control plane is arranged on the bottom of the movable valve plate.

[0014] A driving part is drivingly connected with the movable valve plate, so that the movable valve plate is rotated by the driving part to make the second fluid control plane rotate to the first matching position, the second matching position or the third matching position.

[0015] Further, the driving part comprises:

[0016] A connecting part is connected with the movable valve plate at the bottom and penetrates out of the upper shell at the top.

[0017] A handle is detachably connected with the top of the connecting part, so that the movable valve plate is rotated by pulling the handle.

[0018] Further, the first fluid control plane is provided with a first through hole communicated with the raw water cavity, a second through hole communicated with the clean water cavity, a third through hole communicated with the inlet water cavity, a fourth through hole communicated with the outlet water channel and a fifth through hole communicated with the waste water channel.

[0019] The valve core is provided with a first chamber and a second chamber which are not communicated with each other, and the second fluid control plane is provided with a first through slot communicating with the first chamber and a second through slot communicating with the second chamber, so that in the first matching position, the first through port and the third through port are communicated through the first chamber, and the second through port and the fourth through port are communicated through the second chamber, in the second matching position, the first through port and the fifth through port are communicated through the first chamber, and in the third matching position, the first through port, the second through port, the third through port, the fourth through port and the fifth through port are not communicated with each other in the upper shell.

[0020] Further, one of the first chamber and the second chamber is formed by upwardly recessing the bottom of the dynamic valve sheet, and the other is formed between the top of the dynamic valve sheet and the inner wall of the cavity.

[0021] The first chamber and the second chamber are both formed by upwardly recessing the bottom of the dynamic valve sheet.

[0022] Further, the communication valve comprises:

[0023] A structure is arranged in the upper shell.

[0024] A fixed valve sheet is limitingly arranged on the top of the structure, and the first fluid control plane is arranged on the top of the fixed valve sheet.

[0025] Further, the structure is provided with a first channel, a second channel, a third channel, a fourth channel and a fifth channel which are independent of each other, wherein the first channel is used to communicate the raw water cavity with the cavity, the second channel is used to communicate the clean water cavity with the cavity, the third channel is used to communicate the water inlet cavity with the cavity, the fourth channel is used to communicate the water outlet flow channel with the cavity, and the fifth channel is used to communicate the waste water cavity with the cavity.

[0026] Further, an installation column is arranged between the bottom of the filter cartridge and the bottom wall of the lower shell, and an air bag is arranged on the installation column, and a mounting hole is formed in the middle of the air bag, so that the air bag is mounted on the installation column through the mounting hole; or

[0027] A plurality of support ribs are arranged on the inner side wall of the lower shell in a circumferential direction, and the bottom of the filter cartridge abuts against the support ribs, so that a containing space is formed between the lower end of the filter cartridge and the bottom wall of the lower shell, and an air bag is arranged in the containing space.

[0028] As can be seen from the above technical solution, the filter of this utility model can be put into a filtering state by rotating the valve core. In the filtering state, raw water will flow from the inlet chamber into the raw water chamber through the valve core. After being filtered from the inside to the outside by the filter cylinder, the raw water entering the raw water chamber becomes clean water and flows into the clean water chamber. The clean water in the clean water chamber flows into the outlet channel through the valve core, thereby supplying water for people's daily use. By further rotating the valve core, the filter can be put into a stop state. In the stop state, the valve core disconnects the inlet chamber from the raw water chamber and the outlet channel from the clean water chamber. The valve core is designed to stop water flow between the lower and upper housings, allowing for easy unscrewing of the lower housing to replace the filter cartridge. This design also enables the valve core to further control the residual water in the filter, integrating the stop function inside the filter. This eliminates the need for additional valves on the inlet and outlet channels, resulting in a more compact overall structure, reduced external piping accessories, saved installation space, fewer pipe connection points, and a lower risk of leakage due to excessive connection points. This design results in a filter with a simple structure, low cost, low failure rate, easy maintenance, and easy production, making it highly practical.

[0029] To make the technical concept, other objectives, advantages, features and functions of this utility model clearer and easier to understand, preferred embodiments will be specifically described in the following detailed description, and will be illustrated in conjunction with the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort.

[0031] Figure 1 This is a perspective view of a filter with a water shut-off function provided in an embodiment of this application;

[0032] Figure 2 This is an exploded view of the structure of a filter with a water shut-off function provided in an embodiment of this application;

[0033] Figure 3 This is an exploded view of the structure of a filter with a water shut-off function provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the internal structure of a filter with a water shut-off function provided in an embodiment of this application;

[0035] Figure 5 This is provided by the embodiments of this application. Figure 4 Enlarged image in the image;

[0036] Figure 6 is a structural schematic diagram of a filter with water stop function in a filtering state provided by an embodiment of the present application;

[0037] Figure 7 is a structural schematic diagram of a filter with water stop function in a backwashing state provided by an embodiment of the present application;

[0038] Figure 8 is a structural schematic diagram of a filter with water stop function in a stop state provided by an embodiment of the present application;

[0039] Figure 9 is a structural exploded view of a filter with water stop function from another perspective provided by an embodiment of the present application;

[0040] Among the above drawings, the following reference signs are included:

[0041] 100, lower shell; 110, opening; 120, filter cartridge; 130, raw water cavity; 140, clean water cavity; 150, support rib; 160, accommodation space; 170, air bag;

[0042] 200, upper shell; 210, cavity; 221, structural member; 221a, first channel; 221b, second channel; 221c, third channel; 221d, fourth channel; 221e, fifth channel; 222, valve piece; 230, water inlet cavity; 240, water outlet flow channel; 250, waste water cavity;

[0043] 300, valve core; 310, moving valve piece; 320, driving part; 321, connecting part; 322, handle; 330, first chamber; 340, second chamber;

[0044] 400, first fluid control plane; 410, first through slot; 420, second through slot;

[0045] 500, second fluid control plane; 510, first through port; 520, second through port; 530, third through port; 540, fourth through port; 550, fifth through port. DETAILED DESCRIPTION

[0046] The embodiment of the present application provides a filter with a water stop function, so that at least one of the technical problems existing in the prior art is solved, the filter can be switched between a filtering state and a stop state by rotating the valve core 300, and the filter is different from the existing filter, the internal structure of the filter is relatively simple, the state of the filter can be switched by rotating the valve core 300, a plurality of valves or a plurality of parts need not be opened and closed in sequence to switch the state of the filter, the steps of switching the state of the filter are simplified, the volume of the filter is reduced, the structural stability is high, the stop state is controlled in the filter by the valve core 300, the risk of water leakage of the filter is reduced, the user experience is good, and the operation difficulty is low.

[0047] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] Please refer to Figures 1 to 6 The embodiment provides a filter with a water stop function, which comprises a lower shell 100, an upper shell 200 and a valve core 300, the top of the upper shell 200 is provided with an opening 110, a filter cartridge 120 is arranged in the lower shell 100 in the vertical direction, so that the inner cavity of the lower shell 100 is divided into a raw water cavity 130 and a clean water cavity 140 by the filter cartridge 120, the raw water cavity 130 is located in the hollow interior of the filter cartridge 120, the upper shell 200 is arranged on the top of the lower shell 100, a cavity 210 is arranged in the upper shell 200, a water inlet cavity 230 and a water outlet flow channel 240 are arranged on the outer side of the upper shell 200, the water inlet cavity 230 and the water outlet flow channel 240 are in communication with the cavity 210, the valve core 300 is rotatably arranged in the cavity 210, so as to control the communication or block of the water outlet flow channel 240 and the clean water cavity 140 and the communication or block of the water inlet cavity 230 and the raw water cavity 130 by the valve core 300, the filter has a filtering state and a stop state, so as to be switched to the filtering state or the stop state by rotating the valve core 300, in the filtering state, the water inlet cavity 230 and the raw water cavity 130 are communicated and the clean water cavity 140 and the water outlet flow channel 240 are communicated by the valve core 300, so that the raw water in the raw water cavity 130 flows into the clean water cavity 140 after being filtered from inside to outside by the filter cartridge 120, in the stop state, the water inlet cavity 230 and the raw water cavity 130 are blocked and the water outlet flow channel 240 and the clean water cavity 140 are blocked by the valve core 300.

[0049] It can be seen that the filter of the embodiment can be in a filtering state by rotating the valve core 300, in which the raw water flows from the water inlet cavity 230 into the raw water cavity 130 via the valve core 300, and the raw water entering the raw water cavity 130 becomes clean water after being filtered from the inside to the outside of the filter cartridge 120 and flows into the clean water cavity 140, and the clean water in the clean water cavity 140 flows into the water outlet passage via the valve core 300, thereby being supplied for people's daily use. By further rotating the valve core 300 to make the filter in a stop state, in which the water inlet cavity 230 and the raw water cavity 130 are disconnected by the valve core 300, and the water outlet passage 240 and the clean water cavity 140 are disconnected, the lower shell 100 can be conveniently unscrewed for replacement of the filter cartridge 120. In this way, the valve core 300 can further control the residual water in the filter, and the stop function is integrated in the filter, so that no additional valves need to be installed on the water inlet cavity 230 and the water outlet passage 240, the overall structure is more compact, the external pipeline accessories are reduced, the installation space is saved, the pipeline connection points are reduced, the risk of water leakage caused by too many connection points is reduced, and the filter has the advantages of simple structure, low cost, low failure rate, easy maintenance, easy production, and good practicability.

[0050] In the filter, the filtering structure from the inside to the outside can achieve high precision without affecting the water pressure. Since the filtering area of the outer layer of the filter cartridge 120 is 16-20 times that of the inner layer, the resistance of the outer layer is lower. The filter cartridge 120 is arranged in a structure in which the filtering precision gradually increases from the inside to the outside, so that the resistance does not increase when the raw water is filtered from the inside to the outside. Compared with the existing filter in which the raw water is filtered from the outside to the inside, the filter has a higher filtering rate of raw water.

[0051] In the embodiment, the top of the outer circumferential surface of the lower shell 100 is provided with external thread lines, and the bottom of the inner circumferential surface of the upper shell 200 is provided with internal thread lines. The upper shell 200 and the lower shell 100 are connected by threads.

[0052] Further, the outer side of the upper shell 200 is further provided with a waste water cavity 250, which is in communication with the cavity 210. The filter further has a backwashing state, in which the valve core 300 is rotated to switch the filter to the backwashing state. In the backwashing state, the raw water cavity 130 and the waste water cavity 250 are in communication, so that the waste water in the clean water cavity 140 washes the raw water cavity 130 and is discharged from the waste water cavity 250.

[0053] In the backwashing state, the filter is in communication with the raw water cavity 130 and the waste water cavity 250, and the filtered water in the clean water cavity 140 will backwash the inner wall of the filter cartridge 120 on the side of the raw water cavity 130, so as to discharge the impurities intercepted by the filter cartridge 120 to the waste water cavity 250, so as to restore the filtering effect of the filter cartridge 120. In addition, the filter cartridge 120 is arranged inside the raw water cavity 130 and outside the clean water cavity 140, so as to improve the backwashing effect. It can be understood that in the backwashing state, the clean water is washed from the clean water cavity 140 to the raw water cavity 130. Since the surface area of the outside of the filter cartridge 120 is larger than that of the inside of the filter cartridge 120, under the same washing flow, the flow rate per unit area of the inside of the filter cartridge 120 is faster when the outside of the filter cartridge 120 is washed to the inside of the filter cartridge 120, and the washing effect is better.

[0054] In the embodiment, the filter cartridge 120 can be a pp cotton filter cartridge 120. The pp cotton filter cartridge 120 is a coiled filter cartridge 120 made of non-toxic and odorless polypropylene as raw material, and is made by heating, melting, spinning, drawing and receiving shaping. The pp cotton filter cartridge 120 has a uniform pore size, a deep filtration structure with sparse outside and dense inside, and excellent properties of high filtration efficiency and acid and alkali resistance.

[0055] In the embodiment, as shown in Figures 2 to 3 The upper shell 200 includes an outer shell and a communication valve. The top of the communication valve is formed with a first fluid control plane 400. The bottom of the valve core 300 is formed with a second fluid control plane 500. When the valve core 300 is rotated, the second fluid control plane 500 can be located at least in the first matching position, the second matching position or the third matching position, so that the filter is in the filtering state, the backwashing state or the stop state.

[0056] In the embodiment, as shown in Figures 1 to 9 The valve core 300 includes a movable valve plate 310 and a driving part 320. The movable valve plate 310 is rotatably arranged in the cavity 210. The second fluid control plane 500 is arranged at the bottom of the movable valve plate 310. The driving part 320 is drivingly connected with the movable valve plate 310. The driving part 320 drives the movable valve plate 310 to rotate, so that the second fluid control plane 500 is rotated to the first matching position, the second matching position or the third matching position.

[0057] Preferably, the driving part 320 comprises a connecting part 321 and a handle 322, the bottom of the connecting part 321 is connected with the moving valve plate 310, the top of the connecting part 321 penetrates out of the upper shell 200, and the handle 322 is detachably connected with the top of the connecting part 321, so that the moving valve plate 310 is rotated by pulling the handle 322. By arranging the connecting part 321, the moving valve plate 310 is connected with the external handle 322, the user does not need to directly contact the structure of the moving valve plate 310 inside the filter, and only needs to pull the handle 322 externally to easily drive the moving valve plate 310 to rotate. The handle 322 serves as an obvious operating part, the position and action of the handle 322 are intuitive and visible, the user can clearly see the position of the handle 322, and thus intuitively knows the current working state of the filter, such as Figures 5 to 8 When the handle 322 is in a certain specific position, the user can immediately know that the filter is filtering, backwashing or in a stop state, so that damage or poor use effect caused by misoperation is avoided. The connecting part 321 is further provided with an abutting arm, so that when the bottom of the connecting part 321 is installed into the cavity 210, the abutting arm can abut against the top wall of the inner wall of the upper shell 200, so that the moving valve plate 310 is tightly installed on the communicating valve, and the first fluid control plane 400 and the second fluid control plane 500 are attached.

[0058] In a possible implementation manner, the driving part 320 comprises a motor and a control system, the output shaft of the motor penetrates into the cavity 210 and is drivingly connected with the moving valve plate 310, the control system can control the motor to rotate through a preset program, so as to control the moving valve plate 310 to make the filter be in a filtering state, a backwashing state or a stop state. Preferably, the control system can further integrate various sensors to automatically switch the filter state in real time according to the running data of the filter.

[0059] Further, the first fluid control plane 400 is provided with a first through port 510 communicating with the raw water cavity 130, a second through port 520 communicating with the clean water cavity 140, a third through port 530 communicating with the water inlet cavity 230, a fourth through port 540 communicating with the water outlet flow channel 240 and a fifth through port 550 communicating with the waste water channel. The valve core 300 is provided with a first chamber 330 and a second chamber 340 which are not communicated with each other. The second fluid control plane 500 is provided with a first through groove 410 communicating with the first chamber 330 and a second through groove 420 communicating with the second chamber 340. In the first matching position, the first through port 510 and the third through port 530 are communicated through the first chamber 330, and the second through port 520 and the fourth through port 540 are communicated through the second chamber 340. In the second matching position, the first through port 510 and the fifth through port 550 are communicated through the first chamber 330. In the third matching position, the first through port 510, the second through port 520, the third through port 530, the fourth through port 540 and the fifth through port 550 are not communicated with each other in the upper shell 200.

[0060] The first through hole 510, the second through hole 520, the third through hole 530, the fourth through hole 540, the fifth through hole 550, the first through slot 410 and the second through slot 420 can be provided with one or more, the number and shape of the first through hole 510, the second through hole 520, the third through hole 530, the fourth through hole 540, the fifth through hole 550, the first through slot 410 and the second through slot 420 can be adjusted according to actual conditions and should not be regarded as a limitation of the utility model.

[0061] Further, the first chamber 330 and the second chamber 340 are formed by the bottom of the movable valve plate 310 extending upwardly concave, and the other is formed between the top of the movable valve plate 310 and the inner wall of the cavity 210; in another possible embodiment, the first chamber 330 and the second chamber 340 are formed by the bottom of the movable valve plate 310 extending upwardly concave, the forming mode of the first chamber 330 and the second chamber 340 is simple, and the production and manufacture are facilitated.

[0062] Preferably, as shown in Figures 1 to 9 The waste water cavity 250 is provided with two, the two waste water cavities 250 are oppositely arranged, the first through hole 510 is arranged at the center position, the fifth through hole 550 is arranged by two, the two fifth through holes 550 are arranged on the two sides of the first through hole 510 respectively, and the two fifth through holes 550 are coaxially arranged, so that the filter can be switched to the backwashing state by rotating the movable valve plate 310 by ninety degrees in any direction in the filtering state.

[0063] In the embodiment, as shown in Figures 2 to 9 The communication valve includes a structural member 221 and a fixed valve plate 222, the structural member 221 is arranged in the upper shell 200, the fixed valve plate 222 is limitingly installed on the top of the structural member 221, the first fluid control plane 400 is arranged on the top of the fixed valve plate 222, the communication valve is integrally formed with the upper shell 200, and the communication valve is further provided with a positioning protrusion, and the fixed valve plate 222 is provided with a positioning notch, so that the fixed valve plate 222 is limitingly installed on the communication valve by aligning the positioning protrusion with the positioning notch, and in other embodiments, the fixed valve plate 222 can be fixedly installed on the communication valve by means of adhesive, welding and the like, so that the fixed valve plate 222 cannot rotate in the communication valve.

[0064] Preferably, the fixed valve plate 222 and the movable valve plate 310 are made of ceramic material, so that the movable valve plate 310 and the movable valve plate 310 have good sealing property when the movable valve plate 310 is tightly installed on the fixed valve plate 222.

[0065] Further, the structural member 221 is provided with a first channel 221a, a second channel 221b, a third channel 221c, a fourth channel 221d and a fifth channel 221e which are independent of each other, wherein the first channel 221a is used to communicate the raw water cavity 130 with the cavity 210, the second channel 221b is used to communicate the purified water cavity 140 with the cavity 210, the third channel 221c is used to communicate the water inlet cavity 230 with the cavity 210, the fourth channel 221d is used to communicate the water outlet channel 240 with the cavity 210, and the fifth channel 221e is used to communicate the waste water cavity 250 with the cavity 210, and the first channel 221a, the second channel 221b, the third channel 221c, the fourth channel 221d and the fifth channel 221e provide the raw water cavity 130, the purified water cavity 140, the water inlet cavity 230, the water outlet channel 240 and the waste water cavity 250 with exclusive water flow paths.

[0066] In the embodiment, as shown in Figure 4 The inner side wall of the lower shell 100 is provided with a plurality of support ribs 150 which are spaced apart in the circumferential direction, and the bottom of the filter cartridge 120 abuts against the support ribs 150 to form an accommodation space 160 between the lower end of the filter cartridge 120 and the bottom wall of the lower shell 100, and the air bag 170 is arranged in the accommodation space 160. The filter thus arranged is simple and compact in structure, easy to assemble, low in processing difficulty and production cost, and reasonable in space layout, and effectively improves the space utilization rate in the container.

[0067] In a possible implementation, a mounting column is arranged between the bottom of the filter cartridge 120 and the bottom wall of the lower shell 100, the mounting column is provided with the air bag 170, and the middle portion of the air bag 170 is formed with a mounting hole, so that the air bag 170 is sleeved on the mounting column through the mounting hole to be mounted.

[0068] Further, the volume of the air bag 170 is about 0.75-1.25 times the volume of the raw water cavity 130, and thus arranged, the expansion volume of the air bag 170 is close to the volume of the raw water cavity 130, so that the air bag 170 can expel the sewage equivalent to its expansion volume from the waste water cavity 250 out of the filter when the air bag 170 is expanded due to loss of pressure in the backwashing state, so that the air bag 170 provides better assistance for backwashing by expansion; in other embodiments, an external pressure tank can also be installed on one side of the water outlet channel 240 to provide assistance for backwashing.

[0069] When the water use is stopped, the air bag 170 will be compressed under the action of water pressure, which can effectively eliminate the water hammer impact on the filter water purifier.

[0070] The volume of the raw water cavity 130 is about 1 / 15 of the whole volume of the filter cartridge 120, and the water capacity of the raw water cavity 130 is about 150ml, so that the pressure generated by the air bag 170 after losing pressure can just clean the impurities and sewage in the raw water cavity 130, and in addition to the air bag 170, the external connecting water pipe will also expand and contract under the action of water pressure, so that the volume change generated by the air bag 170 and the water pipe after losing pressure is generally greater than the volume of the raw water cavity 130, so that the impurities and sewage can be cleaned out, and the flushing water is not wasted too much.

[0071] The shell comprises a body and an upper cover, the body is provided with a threaded hole, the upper cover is detachably installed on the body through bolts, the upper cover is provided with a relief hole, and a sealing ring is arranged in the relief hole.

[0072] The assembly steps of the utility model are as follows: first, the air bag 170 is positioned and installed at the bottom of the lower shell 100, then the filter cartridge 120 is vertically placed in the lower shell 100, then the upper shell 200 is threadedly connected to the lower shell 100, then the valve plate 222 is installed on the structural part 221, the positioning convex is aligned with the positioning gap so that the valve plate 222 cannot rotate relative to the upper shell 200, the upper cover is opened, the connecting part 321 and the handle 322 are separated, the combination of the connecting part 321 and the valve plate 310 is placed in the cavity 210, then the upper cover is buckled back to the body, the top of the connecting part 321 is threaded out of the upper cover through the relief hole, and finally the handle 322 is installed back to the connecting part 321 to complete the assembly.

[0073] When the filter core needs to be disassembled and replaced, the upper shell 200 can be screwed out of the lower shell 100, so that the structure is simple and the replacement is convenient.

[0074] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0075] The filter of the utility model, through rotating valve core 300 can make filter in filtering state, under the filtering state, raw water will flow into raw water cavity 130 from water cavity 230 via valve core 300, the raw water that enters raw water cavity 130 becomes clean water after filtering from inside to outside of filter cylinder 120 and flows into clean water cavity 140, the clean water in clean water cavity 140 flows into water outlet channel via valve core 300, thereby supplies people's life use, through further rotating valve core 300 to make filter in stop state, under the stop state, the water cavity 230 and the raw water cavity 130 are disconnected via the valve core 300, the water outlet channel 240 and the clean water cavity 140 are disconnected, thereby conveniently unscrews lower shell 100 and replaces filter cylinder 120, so setting, valve core 300 can make further control to the residual water in filter, integrates stop function in filter interior, need not additionally installs valve on water cavity 230 and water outlet channel 240, makes overall structure more compact, reduces external pipeline accessories, saves installation space, reduces pipeline connecting point, reduces the risk of water leakage possibly caused by too many connecting points, the filter of such setting simple structure, low in cost, low in failure rate, convenient to maintain, easy to produce, the practicality is better.

[0076] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, "and / or" placed between a first object and a second object means one of the first object, the second object, or both the first object and the second object. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0077] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. It will be further understood that the dimensions of the various parts shown in the drawings are not drawn to scale for the sake of convenience. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as falling within the scope of the present application. In the examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not as a limitation. Thus, other examples of the example embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0078] In the description of the present application, the terms "center", "upper", "lower", "front", "back", "left", "right", "transverse", "longitudinal", "vertical", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application.

[0079] It should be noted that in the description of the present application, unless otherwise specified and limited, the terms "set, connected, connected, installed" should be understood broadly, for example, it can be fixedly connected, it can also be detachably connected, it can also be in contact or integrally connected; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] It should also be noted that unless otherwise specified and limited, the terms "installation", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0081] In addition, it should be noted that in the description of the present application, the use of "first", "second" and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and unless otherwise stated, the above terms have no special meaning, therefore cannot be understood as a limitation on the protection scope of the present application. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0082] The above is the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which are also considered within the protection scope of the present application.

Claims

1. A filter having a water stop function, characterized by comprising: include: The lower housing has an opening at the top, and a filter cylinder is vertically arranged in the lower housing to divide the inner cavity of the lower housing into a raw water cavity and a purified water cavity. The raw water cavity is located inside the hollow part of the filter cylinder. An upper shell is disposed on top of the lower shell. A cavity is provided in the upper shell. A water inlet cavity and a water outlet channel are provided on the outer side of the upper shell. Both the water inlet cavity and the water outlet channel are connected to the cavity. A valve core is rotatably disposed in the cavity to control the connection or blockage between the water outlet channel and the purified water cavity, and the connection or blockage between the water inlet cavity and the raw water cavity. The filter has a filtration state and a stop state, which can be switched by rotating the valve core. In the filtration state, the valve core connects the inlet chamber and the raw water chamber and the purified water chamber and the outlet channel, so that the raw water in the raw water chamber flows into the purified water chamber after being filtered from the inside to the outside through the filter cartridge. In the stop state, the valve core disconnects the inlet chamber from the raw water chamber and the outlet channel from the purified water chamber.

2. The filter with a water stop function according to claim 1, characterized in that, The upper housing includes an outer shell and a connecting valve. A first fluid control plane is formed on the top of the connecting valve, and a second fluid control plane is formed on the bottom of the valve core. When the valve core is rotated, the second fluid control plane can be located in a first mating position to put the filter in a filtering state, and the second fluid control plane can be located in a third mating position to put the filter in a stop state.

3. The filter with a water stop function according to claim 2, characterized in that, The outer side of the upper housing is also provided with a wastewater chamber, which is connected to the cavity. The filter also has a backwashing state. By rotating the valve core, the filter is switched to the backwashing state. In the backwashing state, the raw water chamber and the wastewater chamber are connected, so that the wastewater in the clean water chamber flushes the raw water chamber and is discharged from the wastewater chamber. The second fluid control plane can be located in the second mating position so that the filter is in the backwashing state.

4. The filter with a water stop function according to claim 3, characterized in that, The valve core includes: A movable valve plate, which is rotatably disposed in the cavity, and the second fluid control plane is disposed at the bottom of the movable valve plate; A drive unit is connected to the movable valve plate to drive the movable valve plate to rotate, so that the second fluid control plane rotates to a first engagement position, a second engagement position, or a third engagement position.

5. The filter with a water stop function according to claim 4, characterized in that, The drive unit includes: A connecting part, the bottom of which is connected to the movable valve plate, and the top of which extends out of the upper housing; A handle, which is detachably connected to the top of the connecting part, so as to rotate the movable valve plate by turning the handle.

6. The filter with a water stop function according to claim 4, characterized in that, The first fluid control plane is provided with a first port communicating with the raw water chamber, a second port communicating with the clean water chamber, a third port communicating with the inlet water chamber, a fourth port communicating with the outlet water channel, and a fifth port communicating with the wastewater channel. The valve core is provided with a first chamber and a second chamber that are not interconnected. The second fluid control plane is provided with a first through groove that connects the first chamber and a second through groove that connects the second chamber. In a first mating position, the first port and the third port are connected through the first chamber and the second port and the fourth port are connected through the second chamber. In a second mating position, the first port and the fifth port are connected through the first chamber. In a third mating position, the first port, the second port, the third port, the fourth port and the fifth port are not interconnected in the upper housing.

7. The filter with a water stop function according to claim 6, characterized in that, One of the first chambers and the second chamber is formed by an upwardly recessed extension of the bottom of the movable valve plate, and the other is formed between the top of the movable valve plate and the inner wall of the chamber; or Both the first chamber and the second chamber are formed by the bottom of the moving valve plate extending upwards in a recessed manner.

8. The filter with a water stop function according to any one of claims 3 to 7, characterized in that, The connecting valve includes: A structural component, wherein the structural component is disposed within the upper housing; A fixed valve plate is installed on the top of the structural component, and the first fluid control plane is disposed on the top of the fixed valve plate.

9. The filter with water shut-off function according to claim 8, characterized in that, The structural component is provided with a first channel, a second channel, a third channel, a fourth channel, and a fifth channel that are independent of each other. The first channel is used to connect the raw water chamber to the cavity body, the second channel is used to connect the purified water chamber to the cavity body, the third channel is used to connect the inlet water chamber to the cavity body, the fourth channel is used to connect the outlet water channel to the cavity body, and the fifth channel is used to connect the wastewater chamber to the cavity body.

10. The filter with water shut-off function according to claim 1, characterized in that, A mounting post is provided between the bottom of the filter cartridge and the bottom wall of the lower housing. An air bladder is provided on the mounting post, and a mounting hole is formed in the middle of the air bladder so that the air bladder can be sleeved onto the mounting post through the mounting hole for installation; or The inner wall of the lower housing is provided with a plurality of support ribs spaced circumferentially. The bottom of the filter cartridge abuts against the support ribs to form an accommodating space between the lower end of the filter cartridge and the bottom wall of the lower housing. An air bladder is provided in the accommodating space.

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