Filtering device

Abstract

The utility model discloses a filtering device which comprises a lower shell, an upper shell, a filter element and a valve plate, a cavity is formed between the lower shell and the upper shell, the upper shell is provided with a water inlet flow channel, a water outlet flow channel and a waste water flow channel, the filter element is arranged in the cavity, a hollow flow channel is arranged in the filter element, and the valve plate can enable the filtering device to be in a filtering state or a backwashing state. In the filtering state, the water inlet flow channel is communicated with the hollow flow channel, and the water outlet flow channel is communicated with the cavity, and in the backwashing state, the water inlet flow channel is communicated with the cavity, and the wastewater flow channel is communicated with the hollow flow channel, so that backwashing water in the cavity is backwashed into the hollow flow channel from outside to inside through the filter element and is discharged through the wastewater flow channel. Backwash water is provided by the water inlet runner, the flow and pressure of the backwash water are stable, the backwash effect can be remarkably improved, the structure is simple, the user experience feeling is good, and the product practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification equipment technical field especially, relate to a filter device. BACKGROUND

[0002] Due to the problem of environmental pollution is becoming more and more serious, lead to water quality is getting worse and worse, therefore, water filter device as a kind of water quality filter device is more and more favored by people, wherein, prefilter device as a kind of reliable impurity filter device, can effectively filter silt, rust, large particle in tap water, the precision range of prefilter device filter screen is different from 5-30 microns according to different brand and model, mainly remove the sediment impurities and bacteria, microbial debris, rust, sand and other particles above 5 microns greater than 5 microns, avoid the harm to human body and skin, and play a positive protection effect to downstream pipeline, water purifier, water heater, washing machine, high-grade faucet, shower head,

[0003] But, the prefilter device commonly used does not have backwashing function, lead to the dirt particle in water to hang in the filter core material of filter device, with the lapse of time, filter core material is incorporated, easy to cause filter core material blockage, affect the filtered water volume of filter device, even reduce the filtering effect of filter core material, therefore, need to clean or update filter device regularly, for maintaining the water flow and filtering effect of filter device, and the cleaning of prefilter device needs to be disassembled, inconvenient for user's use, at the same time, the existing backwashing filter device structure is complex, and the switching operation of water flow direction under backwashing and filtering state is inconvenient, and the flow and pressure of backwashing water are not enough stable, lead to poor backwashing effect, can not satisfy the user demand. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a filter device, aims at at least one of the technical problems existing in the prior art.

[0005] In order to realize the above-mentioned purpose, the technical scheme of the utility model provides a filter device, comprising:

[0006] Lower shell;

[0007] Upper shell, the upper shell is installed on the lower shell, to form a cavity between the lower shell and the upper shell, the upper shell is provided with water inlet channel, water outlet channel and waste water channel;

[0008] Filter core, the filter core is arranged in the cavity, and the filter core is provided with a hollow flow channel;

[0009] A valve plate is installed on the upper shell, and the valve plate can make the filter device in a filtering state or a backwashing state. In the filtering state, the inlet water channel and the hollow channel are communicated by the valve plate, the outlet water channel and the cavity are communicated, and the raw water in the hollow channel flows into the cavity and is discharged by the outlet water channel after being filtered by the filter element from inside to outside. In the backwashing state, the valve plate communicates the inlet water channel and the cavity and communicates the waste water channel and the hollow channel, so that the backwashing water in the cavity is backwashed by the filter element from outside to inside into the hollow channel and is discharged by the waste water channel.

[0010] Further, a water passing cavity is formed in the upper shell, and the valve plate is rotatably installed in the water passing cavity. By rotating the valve plate, the filter device can be in a bypass state, in which the inlet water channel and the outlet water channel are communicated through the water passing cavity.

[0011] Further, the upper shell comprises:

[0012] A body is provided with a containing cavity;

[0013] A fixed valve assembly is installed in the containing cavity to separate the containing cavity into the water passing cavity between the top of the fixed valve assembly and the inner wall of the body.

[0014] Further, the outer peripheral side wall of the fixed valve assembly is provided with a limiting protrusion in the vertical direction, and a limiting groove is formed in the cavity wall of the containing cavity in the vertical direction. When the fixed valve assembly is installed in the containing cavity, the limiting protrusion is inserted into the limiting groove to prevent the fixed valve assembly from rotating in the containing cavity.

[0015] Further, the valve plate is tightly installed on the fixed valve assembly, and the bottom of the valve plate is tightly arranged with the top of the fixed valve assembly. The top of the valve plate is provided with a connecting part, the top of the connecting part penetrates out of the top of the upper shell, and the top of the connecting part is provided with a handle to drive the valve plate to rotate by pulling the handle.

[0016] Further, the inlet water channel, the outlet water channel and the waste water channel are communicated with the water passing cavity through the fixed valve assembly, and the hollow channel and the cavity are also communicated with the water passing cavity through the fixed valve assembly.

[0017] Further, the top of the fixed valve assembly is formed with a first opening communicated with the inlet water channel, a second opening communicated with the outlet water channel, a third opening communicated with the waste water channel, a fourth opening communicated with the hollow channel, and a fifth opening communicated with the cavity.

[0018] Wherein, the valve disc is rotated to make the filter device in a filtering state, in which the valve disc communicates the first opening with the fourth opening and the fifth opening with the second opening, in a backwashing state, the valve disc communicates the first opening with the fifth opening and the fourth opening with the third opening, and in a bypass state, the first opening and the second opening are communicated.

[0019] Further, the valve disc has at least a first chamber and a second chamber and a first through hole and a second through hole, in the filtering state, the first opening and the fourth opening are communicated with the first chamber respectively, the fifth opening and the second opening are communicated with the second chamber respectively, in the backwashing state, the first opening is arranged corresponding to the first through hole and the fifth opening is arranged corresponding to the second through hole, so that the first opening and the fifth opening are communicated through the water passing cavity, the fourth opening and the third opening are communicated through the first chamber, in the bypass state, the first opening is arranged corresponding to the first through hole and the second opening is arranged corresponding to the second through hole, so that the first opening and the second opening are communicated through the water passing cavity.

[0020] Further, the first chamber and the second chamber are formed by the bottom of the valve disc extending upwardly and concavely.

[0021] Further, the inner wall of the lower shell extends radially inwardly and convexly to form a convex wall, the mounting platform is arranged on the convex wall, the mounting platforms are combined to form a mounting plane, and the bottom of the filter core is arranged on the mounting plane.

[0022] From the above technical scheme can be seen, the filter device of the utility model, through the hollow setting of lower shell and the setting opening at its top, upper shell is installed at the opening to form a cavity between lower shell and upper shell, filter core is arranged in lower shell, hollow flow channel is arranged in the inside of filter core, water inlet flow channel, water outlet flow channel and waste water flow channel are further arranged on upper shell, the filter device can be adjusted to filter state or backwashing state through the valve piece, in filter state, the valve piece communicates water inlet flow channel and hollow flow channel, water outlet flow channel and cavity are communicated, at this time, raw water enters water inlet flow channel and then flows into hollow flow channel, raw water is filtered by filter core in the process of flowing from hollow flow channel into cavity, clean water in cavity flows out through water outlet flow channel to supply user, in backwashing state, the valve piece communicates water inlet flow channel and cavity and communicates waste water flow channel and hollow flow channel, backwashing water enters water inlet flow channel and then flows into cavity, backwashing water in cavity enters hollow flow channel in filter core from the outside of filter core to wash filter core and hollow flow channel, then backwashing water carries impurities and discharges from waste water flow channel, so setting, user can clean filter core to restore the filtering performance of filter core without disassembling filter device, and backwashing water in backwashing state is provided by water inlet flow channel, the flow and pressure of backwashing water are stable, which can significantly improve the backwashing effect, the filter device with such setting has simple structure, good user experience and high practicality.

[0023] In order to make the technical concept and other purposes, advantages, features and effects of the utility model more clear and easy to understand, the preferred embodiments will be described in the following specific embodiments, and the detailed description will be made in the following specific embodiments, and the detailed description will be made in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0025] Figure 1 It is the perspective view of the filter device provided by the embodiment of the application.

[0026] Figure 2 It is the internal structure schematic view of the filter device provided by the embodiment of the application.

[0027] Figure 3 It is the structure exploded view of the filter device provided by the embodiment of the application.

[0028] Figure 4 It is the perspective view of the fixed valve structure provided by the embodiment of the application.

[0029] Figure 5is a structure exploded view of another perspective of the filter device provided by the embodiment of the present application;

[0030] Figure 6 is a schematic view of the valve disc of the filter device in a filtering state provided by the embodiment of the present application;

[0031] Figure 7 is a schematic view of the valve disc of the filter device in a backwashing state provided by the embodiment of the present application;

[0032] Figure 8 is a schematic view of the valve disc of the filter device in a bypass state provided by the embodiment of the present application;

[0033] Figure 9 is a perspective view of the filter device of another embodiment of the filter device provided by the present application;

[0034] Figure 10 is a structure exploded view of the filter device of another embodiment of the filter device provided by the present application;

[0035] Figure 11 is a structure schematic view of the fixed valve structure of another embodiment of the filter device provided by the present application;

[0036] Among the above drawings, the following reference signs are included:

[0037] 100, lower shell; 110, filter core; 111, hollow flow channel; 120, protruding wall; 121, mounting platform;

[0038] 200, upper shell; 210, body; 211, water inlet flow channel; 212, water outlet flow channel; 213, waste water flow channel; 220, containing cavity; 221, limiting groove; 230, fixed valve assembly; 231, limiting protrusion; 232, first opening; 233, second opening; 234, third opening; 235, fourth opening; 236, fifth opening; 237, base; 238, valve body; 238f, first through hole; 238g, second through hole; 238h, third through hole; 238i, fourth through hole; 238j, fifth through hole; 239, fixed valve disc; 240, water passing cavity;

[0039] 300, cavity;

[0040] 400, valve disc; 410, first chamber; 420, second chamber; 430, first through port; 440, second through port;

[0041] 500, connecting part;

[0042] 600, handle;

[0043] 700, pressure relief valve. DETAILED DESCRIPTION

[0044] The embodiment of the present application provides a filtering device, which can solve one of the problems in the prior art, and can clean the filter element 110 to restore the filtering performance of the filter element 110 by adjusting the filtering device to the backwashing state through the valve piece 400, and the backwashing water in the backwashing state is provided by the water inlet flow channel 211, the flow and pressure of the backwashing water are stable, and the backwashing effect can be obviously improved. The filtering device has simple structure and good user experience, and has high practicability. In the filtering device, the backwashing water is washed from the outside of the filter element 110 to the inside of the filter element 110, the inner surface area of the filter element 110 is smaller than the outer surface area of the filter element 110, so the flow speed of the inner surface of the filter element 110 in a unit area is greater than the flow speed of the outer surface of the filter element 110 under a certain flow, and the backwashing effect of the filtering device is better than that of a general filtering device in which the filter element 110 is filtered from the inside to the outside.

[0045] 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 clearly and completely described below in combination 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.

[0046] Please refer to Figures 1 to 8 The embodiment provides a filtering device, which comprises a lower shell 100, an upper shell 200, a filter element 110 and a valve piece 400. The upper shell 200 is installed on the lower shell 100 to form a cavity 300 between the lower shell 100 and the upper shell 200. The upper shell 200 is provided with a water inlet flow channel 211, a water outlet flow channel 212 and a waste water flow channel 213. The filter element 110 is arranged in the cavity 300 and is provided with a hollow flow channel 111. The valve piece 400 is installed on the upper shell 200 and can make the filtering device in a filtering state or a backwashing state. In the filtering state, the valve piece 400 connects the water inlet flow channel 211 and the hollow flow channel 111 and connects the water outlet flow channel 212 and the cavity 300, so that raw water in the hollow flow channel 111 flows into the cavity 300 after being filtered by the filter element 110 from inside to outside and is discharged from the water outlet flow channel 212. In the backwashing state, the valve piece 400 connects the water inlet flow channel 211 and the cavity 300 and connects the waste water flow channel 213 and the hollow flow channel 111, so that backwashing water in the cavity 300 is backwashed into the hollow flow channel 111 from outside to inside through the filter element 110 and is discharged from the waste water flow channel 213.

[0047] It can be seen that the filter device of the embodiment, by hollowing the lower shell 100 and setting an opening at the top thereof, the upper shell 200 is installed at the opening to form a cavity 300 between the lower shell 100 and the upper shell 200, the lower shell 100 is provided with a filter element 110, the inside of the filter element 110 is provided with a hollow flow channel 111, the upper shell 200 is further provided with a water inlet flow channel 211, a water outlet flow channel 212 and a waste water flow channel 213, by the valve piece 400 being capable of adjusting the filter device to a filtering state or a backwashing state, in the filtering state, the valve piece 400 communicates the water inlet flow channel 211 and the hollow flow channel 111, and the water outlet flow channel 212 and the cavity 300, at this time, raw water enters the hollow flow channel 111 from the water inlet flow channel 211, and the raw water is filtered by the filter element 110 in the process of flowing from the hollow flow channel 111 to the cavity 300, the clean water in the cavity 300 flows out from the water outlet flow channel 212 for use by the user, in the backwashing state, the valve piece 400 communicates the water inlet flow channel 211 and the cavity 300, and communicates the waste water flow channel 213 and the hollow flow channel 111, backwashing water enters the cavity 300 from the water inlet flow channel 211, and the backwashing water in the cavity 300 enters the hollow flow channel 111 in the filter element 110 to wash the filter element 110 and the hollow flow channel 111, and then the backwashing water carries impurities out from the waste water flow channel 213, by such a setting, the user does not need to disassemble the filter device to clean the filter element 110 to restore the filtering performance of the filter element 110, and the backwashing water in the backwashing state is provided by the water inlet flow channel 211, the flow and pressure of the backwashing water are stable, and the backwashing effect can be significantly improved, the filter device thus set has a simple structure, a good user experience and strong practicality.

[0048] In the embodiment, the lower shell 100 is a hollow cylindrical structure with one end open, the top of the outer peripheral surface of the lower shell 100 is provided with external threads, and the bottom of the inner peripheral surface of the upper shell 200 is provided with internal threads, so that the upper shell 200 is detachably mounted on the lower shell 100, and the central axes of the upper shell 200 and the lower shell 100 are coaxially arranged, so that when the user needs to replace the filter element 110 or overhaul other parts, the upper shell 200 can be rotated out of the lower shell 100, and the detachable structure thus set is simple, and the filter element 110 is a cylindrical structure, the filter element 110 is arranged in the lower shell 100 in a vertical direction, the central axis of the filter element 110 is coaxially arranged with the central axis of the lower shell 100, the filter element 110 can adopt an activated carbon filter element, a PP cotton filter element or an ultrafiltration membrane filter element, and is preferably a PP cotton filter element, the PP cotton has the characteristics of strong pollution carrying capacity, long service life and low cost, and an air bag can be arranged in the cavity 300, the air bag can reduce the water hammer effect, and the air bag is a hollow film bag body, which is not described in detail herein.

[0049] In the embodiment, the filter element 110 is arranged in an inner dense and outer sparse structure, specifically, the filter element 110 is arranged in a pleated structure, so that the outer surface area of the filter element 110 can be much larger than the inner surface area of the filter element 110, and the outer surface area of the filter element 110 can be configured to be 8-30 times of the inner surface area of the filter element 110, so that in the backwashing state, the backwashing water penetrates from the outer surface of the filter element 110 to the inner surface of the filter element 110, and the backwashing water is gradually gathered and pressurized, so that in a certain amount of washing, the water flow velocity of the inner surface of the filter element 110 is greater than that of the outer surface of the filter element 110, and the backwashing water is continuously provided by the water inlet channel 211. By such arrangement, the flow and pressure of the backwashing water are improved, so as to improve the washing efficiency and effect of the filter device.

[0050] In the embodiment, the filtering precision of the filter element 110 is gradually improved from inside to outside, so that in the filtering state, although the filtering precision of the raw water is gradually improved, the space through which the raw water can pass is also improved, so that the filtering rate of the raw water will not be greatly affected by the gradual increase of the filtering precision, which is beneficial to improve the filtering effect.

[0051] In the embodiment, as shown in Figures 1 to 8 The upper shell 200 is formed with a water passing cavity 240, and the valve plate 400 is rotatably installed in the water passing cavity 240. By rotating the valve plate 400, the filter device can be in a bypass state. In the bypass state, the water inlet channel 211 and the water outlet channel 212 are communicated through the water passing cavity 240. In the bypass state, the raw water flowing from the water inlet channel 211 will not pass through the filter element 110 for filtering and then flow out from the water outlet channel 212 for use by the user. Therefore, in some use scenarios where the user needs a large amount of water and the water quality requirement is not high, the working load of the filter element 110 can be reduced, the maintenance frequency of the filter element 110 can be reduced, the service life of the filter element can be improved, the use cost of the user can be reduced, and when the filter device needs to be maintained daily, the filter device can be switched to the bypass state without causing sudden water stop.

[0052] It is worth noting that, as shown in Figures 1 to 7 The backwashing state and the bypass state of the filter device can exist at the same time. By adjusting the valve plate 400, the water inlet channel 211 and the water outlet channel 212 are communicated, and the water inlet channel 211 and the cavity 300 are also communicated, and the hollow channel 111 and the waste water channel 213 are also communicated. At this time, opening the water inlet channel 211 will cause part of the raw water to flow into the water outlet channel 212 to achieve the bypass effect, and another part of the raw water to flow into the cavity 300 to achieve the backwashing effect. In order to ensure the backwashing efficiency and bypass efficiency of the filter device, the water outlet channel 212 is usually closed when the filter device needs to perform the backwashing function, and the waste water channel 213 is usually closed when the filter device needs to perform the bypass function.

[0053] In the present embodiment, as shown in Figure 8 The bypass state can also exist alone, and the valve plate has a stop structure to block the passage between the water inlet channel 211 and the cavity 300 when the filter device switches to the bypass state.

[0054] Further, as shown in Figures 1 to 5 The upper shell 200 includes a body 210 and a fixed valve assembly 230, the body 210 is provided with a receiving cavity 220, and the fixed valve assembly 230 is installed in the receiving cavity 220 to divide the receiving cavity 220 into a water passing cavity 240 by the fixed valve assembly 230. The water passing cavity 240 is located between the top of the fixed valve assembly 230 and the inner wall of the body 210. This arrangement is conducive to separate machining and assembly of each component during the manufacturing process, improves production efficiency, reduces production cost, and also facilitates maintenance and replacement of components later.

[0055] Further, as shown in Figures 1 to 8 The water inlet channel 211, the water outlet channel 212, and the waste water channel 213 are all communicated with the water passing cavity 240 through the fixed valve assembly 230, and the hollow channel 111 and the cavity 300 are also communicated with the water passing cavity 240 through the fixed valve assembly 230. The fixed valve assembly 230 includes a base 237, a valve body 238, and a fixed valve plate 239. The base 237 is limitingly installed in the receiving cavity 220, the valve body 238 is installed on the upper surface of the base 237, and the fixed valve plate 239 is installed on the upper surface of the valve body 238.

[0056] The valve body 238 is hollow and has an opening at the top of the valve body 238, a plurality of partition plates are formed in the valve body 238, one end of the partition plates is connected with the bottom in the valve body 238, and the other end of the partition plates extends to the opening to form a matching surface on the top surface of the valve body 238, the inside of the valve body 238 is separated into at least a water inlet cavity, a water outlet cavity, a waste water cavity, a raw water cavity and a communication cavity by the plurality of partition plates, a first through hole 238f for communicating with the water inlet cavity, a second through hole 238g for communicating with the water outlet cavity and a third through hole 238h for communicating with the waste water cavity are arranged on the side wall of the valve body 238, a fourth through hole 238i for communicating with the raw water cavity and a fifth through hole 238j for communicating with the communication cavity are arranged on the bottom wall of the valve body 238, the fourth through hole 238i is located at the center of the bottom of the valve body 238, and the fifth through hole 238j is arranged at the eccentric position of the bottom of the valve body 238; the water inlet flow channel 211 and the water outlet flow channel 212 are coaxially arranged, the axis of the waste water flow channel 213 is perpendicular to the axis of the water inlet flow channel 211, the first through hole 238f is aligned with the water inlet flow channel 211, the second through hole 238g is aligned with the water outlet flow channel 212, and the third through hole 238h is aligned with the waste water flow channel 213. In addition, in the embodiment, the water inlet cavity, the water outlet cavity, the waste water cavity, the raw water cavity and the communication cavity can be provided with one or more, the shape and number of the first through hole 238f, the second through hole 238g, the third through hole 238h, the fourth through hole 238i and the fifth through hole 238j can also be adjusted, and such simple replacement should be within the protection scope of the utility model; the contour of the fixed valve plate 239 coincides with the contour of the matching surface. The top of the inner wall of the hollow flow channel 111 protrudes upward and extends an annular protruding wall, a communication structure is arranged on the base 237, one end of the communication structure communicates with the hollow flow channel 111, and the other end of the communication structure communicates with the raw water cavity, so that the hollow flow channel 111 and the raw water cavity are communicated.

[0057] In the embodiment, the fixed valve plate 239 and the valve plate 400 are both made of ceramic material, and the valve plate 400 is tightly installed on the fixed valve plate 239, so that the sealing between the fixed valve plate 239 and the valve plate 400 is good, and the stability of the filter device is high.

[0058] Further, as shown in Figures 1 to 8 The outer circumferential surface of the side wall of the fixed valve assembly 230 is vertically provided with a limiting protrusion 231, and a limiting groove 221 is vertically arranged on the cavity wall of the accommodating cavity 220, so that when the fixed valve assembly 230 is installed into the accommodating cavity 220, the limiting protrusion 231 is inserted into the limiting groove 221 to prevent the fixed valve assembly 230 from rotating in the accommodating cavity 220; in other embodiments, the fixed valve assembly 230 can be fixedly installed on the body 210 by welding, bonding or the like.

[0059] Further, as shown in Figures 1 to 8As shown, the top of the fixed valve assembly 230 is formed with a first opening 232 communicating with the water inlet channel 211, a second opening 233 communicating with the water outlet channel 212, a third opening 234 communicating with the waste water channel 213, a fourth opening 235 communicating with the hollow channel 111, and a fifth opening 236 communicating with the cavity 300. By rotating the valve disc 400, the filter device can be in a filtering state, in which the valve disc 400 communicates the first opening 232 with the fourth opening 235 and communicates the fifth opening 236 with the second opening 233; in a backwashing state, in which the valve disc 400 communicates the first opening 232 with the fifth opening 236 and communicates the fourth opening 235 with the third opening 234; and in a bypass state, in which the first opening 232 and the second opening 233 are communicated.

[0060] In the filtering state, the valve disc 400 communicates the first opening 232 with the fourth opening 235 and communicates the fifth opening 236 with the second opening 233, so that raw water flows into the hollow channel 111 from the water inlet channel 211, and after being filtered by the filter element 110, the raw water becomes clean water which flows out of the cavity 300 to the water outlet channel 212 to provide clean water for users. In the backwashing state, the valve disc 400 communicates the first opening 232 with the fifth opening 236 and communicates the fourth opening 235 with the third opening 234, so that water from the water inlet channel 211 flows into the cavity 300, and backwashing water flows from outside the filter element 110 to inside the filter element 110 to wash the filter element 110 and the hollow channel 111, so that sewage containing impurities is discharged from the waste water channel 213, which can effectively remove the accumulated impurities on the filter element 110, restore the filtering performance of the filter element 110, and prolong the service life of the filter element 110. In the bypass state, the first opening 232 and the second opening 233 are communicated, so that the water inlet channel 211 and the water outlet channel 212 are directly communicated, which can ensure normal water supply in the case that the filter element 110 needs to be replaced, repaired or the filter device fails, and avoid affecting the normal water use of users due to the problem of the filter device. In some scenarios with large water consumption, such as swimming pools, car washing or watering flowers, etc., the raw water does not need to be filtered by the filter element 110, which reduces the working load of the filter element 110 and the replacement frequency of the filter element 110, and reduces the use cost of users.

[0061] The fourth opening 235 is located at the center position, and the first opening 232, the second opening 233, the third opening 234 and the fifth opening 236 are located at the eccentric position.

[0062] Further, the valve plate 400 has at least a first chamber 410 and a second chamber 420, and a first through port 430 and a second through port 440, in the filtering state, the first opening 232 and the fourth opening 235 are communicated with the first chamber 410 respectively, the fifth opening 236 and the second opening 233 are communicated with the second chamber 420 respectively, in the backwashing state, the first opening 232 is arranged corresponding to the first through port 430 and the fifth opening 236 is arranged corresponding to the second through port 440, so that the first opening 232 and the fifth opening 236 are communicated through the water passing cavity 240, the fourth opening 235 and the third opening 234 are communicated through the first chamber 410, in the bypass state, the first opening 232 is arranged corresponding to the first through port 430 and the second opening 233 is arranged corresponding to the second through port 440, so that the first opening 232 and the second opening 233 are communicated through the water passing cavity 240.

[0063] Further, the first chamber 410 and the second chamber 420 are formed by upwardly recessing from the bottom of the valve plate 400, the first chamber 410 and the second chamber 420 are formed by upwardly recessing from the bottom of the valve plate 400, in the processing of the valve plate 400, only a simple recessing process is needed on the bottom to form the chambers, compared with other complex structure designs, the processing technology is simpler, the processing difficulty and cost can be reduced, and the production efficiency is improved.

[0064] Further, the valve plate 400 is tightly installed on the fixed valve assembly 230, so that the bottom of the valve plate 400 is arranged in abutment with the top of the fixed valve assembly 230, the top of the valve plate 400 is provided with a connecting part 500, the top of the connecting part 500 penetrates out of the top of the upper shell 200, the top of the connecting part 500 is provided with a handle 600, so as to drive the valve plate 400 to rotate by pulling the handle 600, the valve plate 400 is rotated by twisting the handle 600, the manual operation mode is simple and the operability is strong, the connecting part 500 and the operating handle 600 are detachable structures, specifically, the top of the connecting part 500 is provided with a square protrusion, the side peripheral surface of the operating handle 600 is provided with a square groove, so as to detachably install the operating handle 600 on the connecting part 500 by inserting the square protrusion into the square groove.

[0065] In a possible implementation, a motor is arranged on the upper end of the connecting part 500, the output shaft of the motor is drivingly connected with the connecting part 500, so as to drive the valve plate 400 to rotate by electric control.

[0066] In the embodiment, as Figures 1 to 8As shown, the filter device further comprises a pressure relief valve 700 arranged on the valve plate 400, one end of the pressure relief valve 700 is communicated with the external atmosphere, the other end of the pressure relief valve 700 is communicated with the hollow flow channel 111, the pressure relief valve 700 can control the communication between the cavity 300 and the external atmosphere, so that when the upper shell 200 needs to be disassembled, the pressure relief valve 700 is controlled to relieve the pressure of the cavity 300, in other embodiments, the pressure relief valve 700 can also be arranged at other positions, the arrangement position of the pressure relief valve 700 should not be regarded as a limitation of the utility model as long as the pressure relief function can be realized, and the pressure relief valve 700.

[0067] In the embodiment, as shown in the drawings, Figure 2 The inner wall of the lower shell 100 extends radially inwardly to form a convex wall 120, the mounting platform 121 is arranged on the convex wall 120, and the mounting platforms 121 are combined to form a mounting plane, and the bottom of the filter element 110 is arranged on the mounting plane.

[0068] The area of the bottom of the filter element 110 is substantially equal to the area of the mounting plane, the bottom of the filter element 110 is arranged on the mounting plane, so that the filter element 110 can be effectively positioned and mounted, the filter element 110 and the lower shell 100 are coaxially arranged, the stability and accuracy of the internal structure of the filter device are ensured, the filter element 110 will not be displaced during the working process, and the filtering effect of the filter element 110 is effectively exerted, the filter element 110 can be conveniently placed on the mounting platform 121 during assembly, the assembly efficiency is improved, and the large-scale production and application of the filter device are facilitated.

[0069] In a possible implementation mode, as shown in the drawings, Figures 9 to 11 The valve body 238 has a water inlet cavity, a water outlet cavity, a waste water cavity, a raw water cavity and a communication cavity, and the difference lies in that the water outlet cavity and the communication cavity are communicated in the valve body 238, the valve plate 400 has a first chamber 410 and a first through port 430 and a second through port 440, in the filtering state, the first chamber 410 communicates the water inlet cavity and the raw water cavity, in the backwashing state, the first chamber 410 communicates the raw water cavity and the waste water cavity, at this time, the water inlet cavity and the communication cavity are communicated through the communication cavity, and in the bypass state, the water inlet cavity and the water outlet cavity are communicated, wherein the valve plate 400 is in the same position in the backwashing state and the bypass state, and the bypass or backwashing function cannot be implemented alone under the premise that the external valve is not controlled.

[0070] In a possible implementation mode, as shown in the drawings, Figures 9 to 11 The waste water flow channel 213 is arranged in two, the two waste water flow channels 213 are coaxially arranged, and the axes of the two waste water flow channels 213 are arranged perpendicularly to the axis of the water inlet flow channel 211, so that in the filtering state, the filter device can be switched to the backwashing state or the bypass state by rotating the valve plate 400 by 90 degrees in any direction.

[0071] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: through hollow setting of the lower shell 100 and setting the opening at the top of the lower shell 100, the upper shell 200 is installed at the opening to form the cavity 300 between the lower shell 100 and the upper shell 200, the filter core 110 is arranged in the lower shell 100, the hollow flow channel 111 is arranged in the filter core 110, the water inlet flow channel 211, the water outlet flow channel 212 and the waste water flow channel 213 are further arranged on the upper shell 200, the filter device can be adjusted to the filtering state or the backwashing state through the valve piece 400, in the filtering state, the valve piece 400 communicates the water inlet flow channel 211 and the hollow flow channel 111, and communicates the water outlet flow channel 212 and the cavity 300, at this time, the raw water enters the hollow flow channel 111 from the water inlet flow channel 211, the raw water is filtered by the filter core 110 in the process of flowing from the hollow flow channel 111 to the cavity 300, and the clean water in the cavity 300 flows out from the water outlet flow channel 212 to supply the user, in the backwashing state, the valve piece 400 communicates the water inlet flow channel 211 and the cavity 300 and communicates the waste water flow channel 213 and the hollow flow channel 111, the backwashing water enters the cavity 300 from the water inlet flow channel 211, the backwashing water in the cavity 300 enters the hollow flow channel 111 in the filter core 110 to wash the filter core 110 and the hollow flow channel 111, and then the backwashing water carries the impurities and discharges from the waste water flow channel 213, through the above setting, the user can clean the filter core 110 to restore the filtering performance of the filter core 110 without disassembling the filter device, the backwashing water in the backwashing state is provided by the water inlet flow channel 211, the flow and the pressure of the backwashing water are stable, the backwashing effect can be obviously improved, the filter device with the above setting has simple structure, good user experience and high practicality.

[0072] It is to be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the example embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification mean the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] The application is not limited by the relative positioning of parts and steps, numerical expressions, and values set forth in these embodiments unless otherwise specifically stated. It is to be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for the sake of convenience in description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail because such techniques, methods, and devices are considered to be part of the patent specification. In all examples shown and discussed herein, any specific value is to be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings, and therefore, once an element is defined in one drawing that it need not be discussed further in subsequent drawings. In the description of the application, the terms "center", "upper", "lower", "front", "rear", "left", "right", "lateral", "longitudinal", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0074] It should be noted that in the description of the present application, unless otherwise specifically stated and limited, the terms "set, connected, connected, installed" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be in contact or integrally connected; for those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] It should also be noted that unless otherwise specifically stated and limited, the terms "installation", "connection", "connection", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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 of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] 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, and therefore cannot be understood as limiting the scope of protection of the present application. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0077] The above is the preferred embodiment of the present application, it should be noted that, for those skilled in the ordinary in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements also as the protection scope of the present application.

Claims

1. A filter device, characterized in that The utility model provides a filter device, comprising: a lower shell; an upper shell mounted on the lower shell to form a cavity between the lower shell and the upper shell, the upper shell being provided with an inlet water channel, an outlet water channel and a waste water channel; a filter element provided in the cavity, the filter element being provided with a hollow channel; a valve plate mounted on the upper shell, the valve plate being capable of causing the filter device to be in a filtering state or a backwashing state, in the filtering state, the inlet water channel and the hollow channel are communicated by the valve plate, the outlet water channel and the cavity are communicated, so that raw water in the hollow channel flows into the cavity after being filtered from inside to outside by the filter element and is discharged by the outlet water channel, in the backwashing state, the valve plate communicates the inlet water channel and the cavity and communicates the waste water channel and the hollow channel, so that backwashing water in the cavity is backwashed from outside to inside into the hollow channel by the filter element and is discharged by the waste water channel.

2. The filter device of claim 1, wherein, The upper shell is formed with a water passing cavity, the valve plate is rotatably mounted in the water passing cavity, and the filter device is in a bypass state by rotating the valve plate, in the bypass state, the inlet water channel and the outlet water channel are communicated through the water passing cavity.

3. The filter device of claim 2, wherein, The upper shell comprises: a body provided with a containing cavity; a fixed valve assembly mounted in the containing cavity to separate the containing cavity into the water passing cavity between the top of the fixed valve assembly and the inner wall of the body by the fixed valve assembly.

4. The filter device of claim 3, wherein, The outer peripheral side wall of the fixed valve assembly is provided with a limiting protrusion in the vertical direction, and a limiting groove is formed in the vertical direction on the cavity wall of the containing cavity, so that when the fixed valve assembly is mounted in the containing cavity, the limiting protrusion is inserted into the limiting groove to prevent the fixed valve assembly from rotating in the containing cavity.

5. The filter device of claim 3, wherein, The valve plate is tightly mounted on the fixed valve assembly, the bottom of the valve plate is tightly arranged with the top of the fixed valve assembly, the top of the valve plate is provided with a connecting part, the top of the connecting part penetrates out of the top of the upper shell, and the top of the connecting part is provided with a handle to drive the valve plate to rotate by pulling the handle.

6. The filter device of claim 3, wherein, The inlet water channel, the outlet water channel and the waste water channel are communicated with the water passing cavity through the fixed valve assembly, and the hollow channel and the cavity are also communicated with the water passing cavity through the fixed valve assembly.

7. The filter device of claim 6, wherein, The top of the fixed valve assembly is formed with a first opening communicated with the inlet water channel, a second opening communicated with the outlet water channel, a third opening communicated with the waste water channel, a fourth opening communicated with the hollow channel and a fifth opening communicated with the cavity. In the filtering state, the valve plate communicates the first opening with the fourth opening and the fifth opening with the second opening by rotating the valve plate, in the backwashing state, the valve plate communicates the first opening with the fifth opening and the fourth opening with the third opening, and in the bypass state, the first opening and the second opening are communicated.

8. The filter device of claim 7, wherein, The valve piece has at least a first chamber and a second chamber and a first through port and a second through port, in the filtering state, the first opening and the fourth opening respectively communicate with the first chamber, the fifth opening and the second opening respectively communicate with the second chamber, in the backwashing state, the first opening is arranged corresponding to the first through port and the fifth opening is arranged corresponding to the second through port, so that the first opening and the fifth opening communicate through the water passing chamber, the fourth opening and the third opening communicate through the first chamber, in the bypass state, the first opening is arranged corresponding to the first through port and the second opening is arranged corresponding to the second through port, so that the first opening and the second opening communicate through the water passing chamber.

9. The filter device of claim 8, wherein, The first chamber and the second chamber are formed by upwardly recessed extension of the bottom of the valve piece.

10. The filter device according to any one of claims 1 to 9, characterized in that The inner wall of the lower shell is formed by radially inwardly protruding extension of a protruding wall, the protruding wall is provided with a mounting platform, the mounting platforms are combined to form a mounting plane, and the bottom of the filter core is arranged on the mounting plane.

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