Ceramic valve core backwashing filter

Abstract

The utility model discloses a ceramic valve core backwash filter, it includes shell, filter material, valve body and air bag, shell includes lower shell and upper shell, the upper shell is provided with water inlet channel, water outlet channel and waste water channel, filter material is vertically provided in the lower shell, the filter material is provided with hollow flow channel, the hollow flow channel is provided with the air bag, the valve body is provided with the air bag, and the air bag is provided with the air bag. The valve body comprises a valve cavity and a rotating part which are arranged in the upper shell, the lower end of the valve cavity is communicated with the hollow flow channel, the valve body has a filtering state and a backwashing state so that the valve body can be switched between the filtering state and the backwashing state through relative rotation of the rotating part and the valve cavity, the air bag is arranged in the lower shell, and the air bag is arranged in the lower shell. The air bag is compressed under the action of water pressure, the valve body is in a backwashing state by rotating the rotating part, and compared with the prior art, the backwashing structure is simplified, the cost is reduced, and the operability of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of water purification and filtration equipment, and in particular to a ceramic valve core backwash filter. Background Technology

[0002] A water filter is a common household water purification device, also known as a water purifier or water quality cleaner. Its main function is to deeply filter and purify water to meet the family's need for clean and safe drinking water.

[0003] In existing technologies, impurities are typically trapped by filter cartridges to achieve water filtration. After a certain period of use, impurities remain on the filter cartridges. Since most filters lack backwashing capabilities, these residues not only clog the cartridges, affecting filtration efficiency, but also cause secondary pollution to the flowing water. Users need to frequently replace the cartridges to maintain filtration effectiveness, resulting in high operating costs and a poor user experience. Currently, there is a backwashing method that uses a pressure tank at the rear of the filter for pressurization. A main inlet valve is located at the front of the filter, and a flushing pipe with a flushing valve connects the filter and the main inlet valve. During backwashing, the main valve is closed first, then the flushing valve is opened, releasing pressure in the tank and flushing impurities out through the flushing pipe. However, this backwashing device is structurally complex, its effectiveness is unreliable, its installation cost is high, maintenance is difficult, and the user operation is complicated, resulting in a poor user experience and failing to meet user needs. Utility Model Content

[0004] The purpose of this invention is to provide a ceramic valve core backwash filter, which aims to solve at least one of the technical problems in the prior art.

[0005] To achieve the above objectives, the present invention provides a ceramic valve core backwash filter, comprising:

[0006] The outer shell includes a lower shell and an upper shell. The upper shell is provided with a water inlet channel, a water outlet channel and a wastewater channel. The water outlet channel is connected to the inner cavity of the lower shell.

[0007] The filter media is vertically arranged inside the lower housing and has a hollow flow channel.

[0008] The valve body includes a valve cavity and a rotating part disposed within the upper housing. The lower end of the valve cavity is connected to the hollow flow channel. The valve body has a filtration state and a backwashing state. The valve body can be switched between the filtration state and the backwashing state by rotating the rotating part relative to the valve cavity. When the valve body is in the filtration state, the valve body connects the inlet channel to the hollow flow channel, so that the water flowing in from the inlet channel flows into the hollow flow channel through the valve body, and flows into the lower housing after being filtered from the inside to the outside by the filter media and then flows out through the outlet channel. When the valve body is in the backwashing state, the valve body connects the wastewater channel to the hollow flow channel.

[0009] An air bladder is disposed in the lower housing so that the air bladder is compressed under water pressure. When the valve body is in the backwashing state, the air bladder expands due to depressurization, causing the filtered clean water in the lower housing to backwash the filter media. This flushes the impurities and sewage intercepted by the filter media into the hollow flow channel and discharges through the wastewater channel.

[0010] Furthermore, the valve cavity includes:

[0011] The valve housing has at least three longitudinally arranged and non-communicating inlet chambers: a water inlet chamber, a wastewater chamber, and a connecting chamber. The sidewall of the water inlet chamber is connected to the water inlet channel, the sidewall of the wastewater chamber is connected to the wastewater channel, and the connecting chamber is connected to the hollow flow channel. The top of the water inlet chamber has a first opening, the top of the wastewater chamber has a second opening, and the top of the connecting chamber has a third opening.

[0012] The rotating part is rotatably disposed above the valve body so that the first opening and the third opening or the second opening and the third opening can be connected by rotating the rotating part, so that the valve body is in a filtering state or a backwashing state.

[0013] Furthermore, the valve cavity also includes:

[0014] A valve plate, which is fixed to the top of the valve housing, and has a first valve port communicating with a first opening, a second valve port communicating with a second opening, and a third valve port communicating with a third opening.

[0015] The rotating part is rotatably attached to the valve plate so that the first valve port and the third valve port or the second valve port and the third valve port can be connected by rotating the rotating part, thereby putting the valve body into a filtering state or a backwashing state.

[0016] Furthermore, the outer wall of the water inlet chamber is provided with a water inlet, and the water inlet channel is connected to the water inlet chamber through the water inlet; the outer wall of the wastewater chamber is provided with a wastewater inlet, and the wastewater channel is connected to the wastewater chamber through the wastewater inlet.

[0017] The lower end of the connecting cavity has a connecting port for connecting to the hollow flow channel.

[0018] Furthermore, the rotating part includes:

[0019] A cover body, wherein at least one flow groove is provided on the cover body;

[0020] A driving component is connected to the cover body to drive the cover body to rotate, thereby switching the valve body to a backwash state or a filtration state. In the filtration state, the first opening and the third opening are connected through the flow channel, and the cover body blocks the second opening. In the backwash state, the second opening and the third opening are connected through the flow channel, and the cover body blocks the first opening.

[0021] Furthermore, the driving element includes:

[0022] A connecting rod is disposed at the top of the cover, and the top of the connecting rod extends through the upper housing.

[0023] An operating handle is detachably connected to the top of the connecting rod.

[0024] Furthermore, a water inlet is formed between the top of the valve body and the inner wall of the upper housing, and the water inlet is connected to the flow channel.

[0025] Alternatively, the bottom of the cover is recessed and extends inward to form a water inlet cavity inside the cover, and the water inlet cavity is connected to the flow channel.

[0026] Specifically, when the valve body is in the backwashing state, the upper water chamber connects the wastewater chamber and the connecting chamber through the flow channel; when the valve body is in the filtration state, the upper water chamber connects the inlet chamber and the connecting chamber through the flow channel.

[0027] Furthermore, the filter material has a roll-shaped structure, and the center of the filter material extends vertically to form the hollow flow channel.

[0028] Furthermore, a mounting post is provided between the bottom of the filter material and the bottom wall of the lower housing, and the air bladder has an annular structure to form a mounting hole in the middle of the air bladder so that the air bladder can be fitted onto the mounting post through the mounting hole for installation; or, multiple support ribs are provided circumferentially at intervals on the inner sidewall of the lower housing, and the upper and lower ends of the filter material abut against the upper housing and the support ribs respectively to form an accommodating space between the lower end of the filter material and the bottom wall of the lower housing, and the air bladder is placed in the accommodating space.

[0029] Furthermore, the central axis of the water inlet channel extends horizontally, and the central axis of the wastewater channel also extends horizontally, with the central axis of the wastewater channel perpendicular to the central axis of the water inlet channel.

[0030] As can be seen from the above technical solution, this utility model uses a ceramic valve core backwash filter. When the valve body is in the filtration state, raw water flows in through the inlet channel and then through the valve body into the hollow flow channel. After being filtered from the inside out by the filter media, it flows into the lower housing and out through the outlet channel to supply domestic use. When the valve body is in the backwash state, the filtered water inside the housing is backwashed back into the hollow flow channel by the air bladder, and the wastewater flows out through the wastewater channel through the valve body. This design allows the valve body state to be switched by rotating the rotating part, and the filtered water backwashes the filter media instead of using raw water to backwash the filter media, thus avoiding... When the filter media is secondary contaminated, the filtered water inside the outer shell washes the filter media and enters the hollow flow channel when the valve body is in the backwash state. Because the inner surface area of ​​the filter media is small, the flow velocity is high when the filtered water washes the inner surface of the filter media, which in turn makes the scouring intensity of the filtered water high, effectively improving the scouring effect. Most of the impurities and sewage can be discharged to restore the filtration performance of the filter media, which is beneficial to improving the service life of the filter media, reducing the cost of using the filter media, and reducing the maintenance frequency. The working state of the valve body can be switched by rotating the rotating part to achieve the backwashing effect, which simplifies the backwashing structure, reduces costs, and improves the operability for users.

[0031] 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

[0032] 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.

[0033] Figure 1 This is a perspective view of a ceramic valve core backwash filter provided in an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the internal structure of a ceramic valve core backwash filter provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the internal structure of a ceramic valve core backwash filter provided in an embodiment of this application from another perspective;

[0036] Figure 4 This is an exploded view of the structure of a ceramic valve core backwash filter provided in an embodiment of this application;

[0037] Figure 5 This is an exploded view of the structure of a ceramic valve core backwash filter provided in an embodiment of this application;

[0038] Figure 6 This is an exploded view of the valve body provided in the embodiment of this application;

[0039] Figure 7 This is an exploded view of the valve body provided in an embodiment of this application from another perspective;

[0040] Figure 8 This is an exploded view of another valve body structure provided in an embodiment of this application;

[0041] Figure 9 This is an exploded view of the valve body of a ceramic valve core backwash filter according to another embodiment of this application.

[0042] Figure 10 This is an exploded view of the valve body of a ceramic valve core backwash filter according to another embodiment of the present application.

[0043] The above figures include the following reference numerals:

[0044] 100. Outer shell; 110. Lower shell; 120. Upper shell; 121. Water inlet channel; 122. Water outlet channel; 123. Wastewater channel; 130. Supporting rib;

[0045] 200. Filter media; 210. Hollow flow channel;

[0046] 300, Valve body; 310, Valve cavity; 311, Valve shell; 312a, Inlet chamber; 312b, Wastewater chamber; 312c, Connecting chamber; 312d, First opening; 312e, Second opening; 312f, Third opening; 312g, Inlet; 312h, Wastewater outlet; 312i, Connecting port; 313, Valve plate; 313a, First valve port; 313b, Second valve port; 313c, Third valve port; 314, Sealing gasket; 320, Rotating part; 321, Cover; 322, Flow groove; 323, Driving component; 323a, Connecting rod; 323b, Operating handle; 323c, Abutment surface;

[0047] 400. Upper water cavity;

[0048] 500. Sewer chamber;

[0049] 600, airbag. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] Please refer to the following: Figures 1 to 8 In a first aspect, this embodiment provides a ceramic valve core backwash filter, the key features of which include a housing 100, filter media 200, valve body 300, and air bladder 600. The housing 100 includes a lower housing 110 and an upper housing 120. The upper housing 120 is provided with an inlet channel 121, an outlet channel 122, and a wastewater channel 123. The outlet channel 122 is connected to the inner cavity of the lower housing 110. The filter media 200 is vertically disposed within the lower housing 110 and is provided with a hollow flow channel 210. The valve body 300 includes a valve cavity 310 disposed within the upper housing 120 and a rotating part 320. The lower end of the valve cavity 310 is connected to the hollow flow channel 210, and the valve body 300 has a filtering state and a backwashing state. The valve body 300 is switched between the filtering state and the backwashing state by rotating the rotating part 320 relative to the valve cavity 310. When valve 300 is in the filtration state, valve body 300 connects the inlet channel 121 with the hollow flow channel 210, so that the water flowing in from the inlet channel 121 flows into the hollow flow channel 210 through valve body 300, and flows into the lower housing 110 after being filtered from the inside to the outside by filter media 200, and flows out through the outlet channel 122. When valve body 300 is in the backwashing state, valve body 300 connects the wastewater channel 123 with the hollow flow channel 210. Air bladder 600 is set in the lower housing 110 so that air bladder 600 is compressed under water pressure. When valve body 300 is in the backwashing state, the air bladder 600 expands due to depressurization, so that the filtered clean water in the lower housing 110 backwashes the filter media 200, so that the impurities and sewage intercepted by the filter media 200 are flushed into the hollow flow channel 210 and discharged through the wastewater channel 123.

[0052] As can be seen, this utility model uses a ceramic valve core backwash filter. When the valve body 300 is in the filtration state, raw water flows in through the inlet channel 121 and then through the valve body 300 into the hollow flow channel 210. After being filtered from the inside out by the filter media 200, it flows into the lower housing 110 and out through the outlet channel 122 to supply water for daily use. When the valve body 300 is in the backwash state, the filtered water in the housing 100 is backwashed back into the hollow flow channel 210 by the air bladder 600, and the wastewater flows out through the wastewater channel 123 through the valve body 300. With this configuration, the state of the valve body 300 is switched by rotating the rotating part 320, and the filtered water backwashes the filter media 200 instead of backwashing the filter media 200 with raw water. This system prevents secondary contamination of the filter media 200. When the valve body 300 is in the backwashing state, the filtered water inside the housing 100 washes the filter media 200 and enters the hollow flow channel 210. Because the inner surface area of ​​the filter media 200 is small, the flow rate is high when the filtered water washes onto the inner surface of the filter media 200, resulting in a high scouring intensity and effectively improving the scouring effect. Most of the impurities and wastewater can be discharged to restore the filtration performance of the filter media 200, which helps to improve the service life of the filter media 200, reduce the cost of using the filter media 200, and reduce the maintenance frequency. The working state of the valve body 300 can be switched by rotating the rotating part 320 to achieve the backwashing effect, simplifying the backwashing structure, reducing costs, and improving user operability.

[0053] In this embodiment, the top of the outer peripheral surface of the lower housing 110 is provided with an external thread, and the inner peripheral surface of the upper housing 120 is provided with an internal thread, so that the upper housing 120 and the lower housing 110 are connected by threads.

[0054] In this embodiment, as Figures 2 to 7 As shown, the valve cavity 310 includes a valve housing 311. The valve housing 311 has at least three longitudinally arranged and non-communicating inlet chambers 312a, 312b, and 312c. The side wall of the inlet chamber 312a is connected to the inlet channel 121, the side wall of the wastewater chamber 312b is connected to the wastewater channel 123, and the 312c is connected to the hollow flow channel 210. The top of the inlet chamber 312a has a first opening 312d, the top of the wastewater chamber 312b has a second opening 312e, and the top of the 312c has a third opening 312f. The rotating part 320 is rotatably disposed above the valve housing 311 so that the first opening 312d and the third opening 312f or the second opening 312e and the third opening 312f can be connected by rotating the rotating part 320, so that the valve body 300 is in a filtering state or a backwashing state.

[0055] In this embodiment, as Figures 2 to 7As shown, the valve cavity 310 also includes a valve plate 313, which is fixed to the top of the valve housing 311. The valve plate 313 has a first valve port 313a communicating with the first opening 312d, a second valve port 313b communicating with the second opening 312e, and a third valve port 313c communicating with the third opening 312f. The rotating part 320 is rotatably attached to the valve plate 313 so that the first valve port 313a and the third valve port 313c or the second valve port 313b and the third valve port 313c can be connected by rotating the rotating part 320, thereby putting the valve body 300 into a filtering state or a backwashing state.

[0056] The valve plate 313 is mounted on the top of the valve body 311. The rotating part 320 rotates on the valve plate 313, and by rotating the rotating part 320, the first valve port 313a and the third valve port 313c or the second valve port 313b and the third valve port 313c are connected, thus placing the valve body 300 in either a filtering or backwashing state. With this configuration, the water flow is clear in different states of the valve body 300. Preferably, both the valve plate 313 and the rotating part 320 are made of ceramic material, allowing them to rotate relative to each other and providing good sealing. The ceramic material has extremely high hardness and wear resistance, enabling the valve body 300 to withstand frequent rotation and friction during long-term use, reducing wear and extending service life. The ceramic material also has excellent corrosion resistance, resisting water erosion, reducing the frequency of maintenance and replacement, and lowering maintenance costs.

[0057] Preferably, such as Figures 1 to 7As shown, the valve housing 311 is a hollow cylindrical structure. A baffle is provided inside the valve housing 311 to divide the internal chamber into an inlet chamber 312a, a wastewater chamber 312b, and a connecting chamber 312c. Specifically, a first baffle is radially disposed inside the valve housing 311 to divide the internal chamber into two approximately equal semi-cylindrical chambers. A second baffle, perpendicular to the first baffle, divides one of the semi-cylindrical chambers into two approximately equal quarter-circles. The cylindrical chamber includes an undivided semi-cylindrical chamber 312c, and two quarter-cylindrical chambers 312a and 312b, respectively. A first opening 312d, a second opening 312e, and a third opening 312f are respectively associated with the inlet chamber 312a, the wastewater chamber 312b, and the connecting chamber 312c. A first valve port 313a, a second valve port 313b, and a third valve port 313c are respectively associated with the first opening 312d. d. Corresponding arrangement of the second opening 312e and the third opening 312f: The rotating part 320 includes a cover 321 and a driving member 323. The cover 321 has at least one flow groove 322. The driving member 323 is driven to connect with the cover 321 so that the cover 321 is rotated by the driving member 323 to switch the valve body 300 to a backwashing state or a filtering state. In the filtering state, the first opening 312d and the third opening 312f are connected through the flow groove 322, and the cover 321 blocks the second opening 312e. In the backwashing state, the second opening 312e and the third opening 312f are connected through the flow groove 322, and the cover 321 blocks the first opening 312d. In this embodiment, the flow groove 322 is composed of two oppositely arranged quarter circles so that when the valve body 300 needs to switch to different states, the cover 321 only needs to be rotated 90 degrees in any direction.

[0058] Preferably, the valve cavity 310 further includes a sealing gasket 314, which is disposed between the valve housing 311 and the valve plate 313.

[0059] like Figure 8 As shown, in one possible implementation of the valve body 300, the connecting cavity 312c and the wastewater cavity 312b are arranged on the same axis, and the connecting cavity 312c and the inlet cavity 312a are arranged on a straight line perpendicular to the axis. The flow slot 322 is formed by a straight groove so that when the valve body 300 needs to switch between different states, it can be switched by simply rotating the cover 321 90 degrees in any direction. In the backwashing state, the flow slot 322 connects the wastewater cavity 312b and the connecting cavity 312c. In the filtration state, the inlet cavity 312a and the connecting cavity 312c are connected.

[0060] Furthermore, an inlet 312g is provided on the outer wall of the inlet chamber 312a, and the inlet channel 121 communicates with the inlet chamber 312a through the inlet 312g. A wastewater inlet 312h is provided on the outer wall of the wastewater chamber 312b, and the wastewater channel 123 communicates with the wastewater chamber 312b through the wastewater inlet 312h. A lower water chamber 500 is formed at the bottom of the valve body 300, and the lower water chamber 500 communicates with the hollow flow channel 210. A connecting port 312i is provided on the wall of the connecting chamber 312c to connect with the lower water chamber 500, so that the connecting chamber 312c communicates with the hollow flow channel 210. This arrangement makes the water flow path clearer and more efficient. High efficiency ensures smooth water flow into and out of the filter, reducing water flow resistance, improving filtration efficiency, and enhancing product consistency. It is worth noting that the number and shape of the first opening 312d, the second opening 312e, the third opening 312f, the first valve port 313a, the second valve port 313b, and the third valve port 313c can be changed to some extent. Such simple changes should be within the protection scope of this utility model without affecting the function. In possible implementation methods, multiple wastewater chambers 312b can be set, and there can also be multiple corresponding wastewater ports 312h and wastewater channels 123.

[0061] Furthermore, such as Figures 1 to 7 As shown, an upper water cavity 400 is formed between the top of the valve body 300 and the inner wall of the upper housing 120, and the upper water cavity 400 communicates with the flow channel 322; or as shown Figure 9 and Figure 10 As shown, the bottom of the cover 321 is recessed and extends inward to form an upper water chamber 400 inside the cover 321. The upper water chamber 400 is connected to the flow channel 322. When the valve body 300 is in the backwashing state, the upper water chamber 400 connects the wastewater chamber 312b and the connecting chamber 312c through the flow channel 322. When the valve body 300 is in the filtration state, the upper water chamber 400 connects the inlet chamber 312a and the connecting chamber 312c through the flow channel 322.

[0062] In this embodiment, the upper housing 120 also includes an upper cover and a main body. The upper cover and the main body are respectively provided with threaded holes so that the upper cover can be installed on the main body by bolts and nuts. The main body is provided with an inner cavity for accommodating the valve body 300. The cavity wall at the bottom of the inner cavity extends radially inward to form a limiting step. When the valve body 300 is installed into the inner cavity, the limiting step limits the valve body 300 longitudinally so that the valve body 300 cannot continue to move downward. By applying glue to the outer peripheral surface of the valve housing 311, the valve housing 311 cannot rotate in the inner cavity. By applying glue to the top of the valve housing 311, the valve housing 311 is relatively fixed between the valve plates 313. In one possible implementation, after the valve body 300 is installed into the inner cavity, the valve cavity 310 is relatively fixedly set on the main body by welding. In other embodiments, the valve cavity 310 and the upper housing 120 can also be made into an integral structure.

[0063] In this embodiment, please refer to the following: Figures 2 to 5 The driving component 323 includes a connecting rod 323a and an operating handle 323b. The bottom of the connecting rod 323a is connected to the top of the cover 321, and the top of the connecting rod 323a protrudes through the cover. The operating handle 323b is detachably connected to the top of the connecting rod 323a. By moving the operating handle 323b, the cover 321 can be driven to rotate on the valve cavity 310, and the valve body 300 can be put into a backwashing state or a filtering state.

[0064] When installing the cover 321 and the drive unit 323, firstly, the connecting rod 323a and the operating handle 323b are separated. Then, the bottom of the connecting rod 323a is fixedly connected to the top of the cover 321 by means of gluing, welding, etc. Then, the cover 321 is inserted into the main body. The center of the cover has a clearance hole, and a sealing ring is installed in the clearance hole. The cover is closed onto the main body, and the top of the connecting rod 323a passes through the clearance hole. Then, the connecting rod 323a and the operating handle 323b are connected to complete the installation. It is worth noting that the connecting rod 323a has a contact surface 323c, which abuts against the bottom surface of the cover so that when the cover is closed onto the main body, the cover 321 is pressed tightly onto the valve body 300. In one possible implementation, the drive unit 323 consists of a motor assembly. The output shaft of the motor is fixedly connected to the cover 321 by welding, gluing, or other means. The motor is controlled to operate so that the output shaft of the motor drives the cover 321 to rotate on the valve cavity 310. Other control components are existing technologies and will not be described in detail here.

[0065] Furthermore, the filter material 200 has a roll-shaped structure, and the center of the filter material 200 extends vertically to form a hollow flow channel 210.

[0066] The filter media 200 is designed with a rolled structure, which provides a larger filtration area, thereby significantly improving filtration efficiency. The rolled structure allows water to flow evenly through the filter media 200, ensuring a more thorough and efficient filtration effect. The center of the filter media 200 extends vertically to form a hollow flow channel 210, which simplifies the water flow path, reduces water flow resistance, and increases the filtration speed. The filter media 200 can be made of PP cotton filter cartridges. PP cotton filter cartridges are made of non-toxic and odorless polypropylene as raw material, which is heated, melted, spun, drawn, and shaped into rolled filter media 200. PP cotton filter cartridges have a deep filtration structure with uniform pore size, a loose outer layer and a dense inner layer, and have the advantage of high filtration efficiency.

[0067] The hollow channel 210 has a volume approximately 1 / 20th that of the filter media 200, and a water capacity of approximately 150ml. Its small size is similar to the contracted volume of the air bladder 600. Therefore, the pressure generated by the depressurization and expansion of the air bladder 600 is sufficient to completely drain impurities and wastewater from the hollow channel 210.

[0068] Backwashing is the reverse flow of water from the outer surface of the filter media 200 to the inner pores of the filter media 200. The outer surface area of ​​the filter media 200 is usually more than 5 times the inner surface area of ​​the pores. With the same amount of flushing water, the flow rate of water per unit area on the inner surface of the filter media 200 is 5 times that on its outer surface. Therefore, the flushing effect from the outside to the inside of the filter media 200 is much better than the flushing from the inside to the outside. The flushing effect depends on the instantaneous pressure difference generated on the surface of the filter media 200. When the filter media 200 switches from the filtration state to the backwashing state, a pressure difference will be formed between the inside of the water purifier and the wastewater channel 123. The faster the filter media 200 switches, the greater the pressure difference. The impurities adhering to the filter media 200 will be flushed away instantly. These impurities are discharged from the wastewater channel 123. The same amount of water as the hollow flow channel 210 can be used to cleanly discharge the impurities without consuming a large amount of water for flushing. Moreover, the flushing effect is better. After flushing, the valve body 300 can be rotated to return to the initial filtration state.

[0069] In addition, the housing 100 can also be made of a transparent material, allowing users to observe the filter media 200 from the outside to determine whether the filter media 200 needs to be cleaned or replaced.

[0070] In this embodiment, an installation post is provided between the bottom of the filter material 200 and the bottom wall of the lower housing 110. The air bladder 600 has an annular structure, with an installation hole formed in the middle of the air bladder 600, so that the air bladder 600 can be fitted onto the installation post through the installation hole for installation; or, multiple support ribs 130 are provided circumferentially at intervals on the inner sidewall of the lower housing 110, and the upper and lower ends of the filter material 200 abut against the upper housing 120 and the support ribs 130 respectively, so that an accommodating space is formed between the lower end of the filter material 200 and the bottom wall of the lower housing 110, and the air bladder 600 is placed in the accommodating space.

[0071] Preferably, please refer to the following: Figures 1 to 5The central axis of both the inlet channel 121 and the wastewater channel 123 extends horizontally, and the central axis of the wastewater channel 123 is perpendicular to the central axis of the inlet channel 121. This horizontal extension design allows water to flow smoothly into and out of the filter, reducing flow resistance and improving filtration efficiency and backwashing effect. The central axes of both the inlet channel 121 and the wastewater channel 123 extend horizontally, and the central axis of the wastewater channel 123 is perpendicular to the central axis of the inlet channel 121. This layout design makes the routing of the inlet channel 121 and the wastewater channel 123 more rational, reduces the complexity of the water flow path, and improves water flow efficiency.

[0072] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: When the valve body 300 is in the filtration state, raw water flows in through the inlet channel 121 and through the valve body 300 into the hollow flow channel 210, and after being filtered from the inside to the outside by the filter material 200, it flows into the lower housing 110 and out through the outlet channel 122 to supply people's daily use. When the valve body 300 is in the backwashing state, the filtered water in the outer shell 100 is backwashed back into the hollow flow channel 210 under the action of the air bladder 600, and the wastewater flows out through the wastewater channel 123 through the valve body 300. With this configuration, the state of the valve body 300 is switched by rotating the rotating part 320, and the filtered water backwashes the filter material 200 instead of backwashing the filter material with raw water. The filter media 200 can avoid secondary contamination. When the valve body 300 is in the backwashing state, the filtered water in the outer shell 100 washes the filter media 200 and enters the hollow flow channel 210. Since the inner surface area of ​​the filter media 200 is small, the flow rate is high when the filtered water washes the inner surface of the filter media 200, which makes the scouring intensity of the filtered water high, effectively improving the scouring effect. Most of the impurities and sewage can be discharged to restore the filtration performance of the filter media 200, which is conducive to improving the service life of the filter media 200, reducing the use cost of the filter media 200, and reducing the maintenance frequency. The working state of the valve body 300 can be switched by rotating the rotating part 320 to achieve the backwashing effect, simplifying the backwashing structure, reducing costs, and improving the operability for users.

[0073] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0074] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0075] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A ceramic valve core backwash filter, characterized in that, include: The outer shell includes a lower shell and an upper shell. The upper shell is provided with a water inlet channel, a water outlet channel and a wastewater channel. The water outlet channel is connected to the inner cavity of the lower shell. The filter media is vertically arranged inside the lower housing and has a hollow flow channel. The valve body includes a valve cavity and a rotating part disposed within the upper housing. The lower end of the valve cavity is connected to the hollow flow channel. The valve body has a filtration state and a backwashing state. The valve body can be switched between the filtration state and the backwashing state by rotating the rotating part relative to the valve cavity. When the valve body is in the filtration state, the valve body connects the inlet channel to the hollow flow channel, so that the water flowing in from the inlet channel flows into the hollow flow channel through the valve body, and flows into the lower housing after being filtered from the inside to the outside by the filter media and then flows out through the outlet channel. When the valve body is in the backwashing state, the valve body connects the wastewater channel to the hollow flow channel. An air bladder is disposed in the lower housing so that the air bladder is compressed under water pressure. When the valve body is in the backwashing state, the air bladder expands due to depressurization, causing the filtered clean water in the lower housing to backwash the filter media. This flushes the impurities and sewage intercepted by the filter media into the hollow flow channel and discharges through the wastewater channel.

2. The ceramic valve core backwash filter according to claim 1, characterized in that, The valve cavity includes: The valve housing has at least three longitudinally arranged and non-communicating inlet chambers: a water inlet chamber, a wastewater chamber, and a connecting chamber. The sidewall of the water inlet chamber is connected to the water inlet channel, the sidewall of the wastewater chamber is connected to the wastewater channel, and the connecting chamber is connected to the hollow flow channel. The top of the water inlet chamber has a first opening, the top of the wastewater chamber has a second opening, and the top of the connecting chamber has a third opening. The rotating part is rotatably disposed above the valve body so that the first opening and the third opening or the second opening and the third opening can be connected by rotating the rotating part, so that the valve body is in a filtering state or a backwashing state.

3. The ceramic valve core backwash filter according to claim 2, characterized in that, The valve cavity further includes: A valve plate, which is fixed to the top of the valve housing, and has a first valve port communicating with a first opening, a second valve port communicating with a second opening, and a third valve port communicating with a third opening. The rotating part is rotatably attached to the valve plate so that the first valve port and the third valve port or the second valve port and the third valve port can be connected by rotating the rotating part, thereby putting the valve body into a filtering state or a backwashing state.

4. The ceramic valve core backwash filter according to claim 2, characterized in that, The outer wall of the water inlet chamber is provided with a water inlet, and the water inlet channel is connected to the water inlet chamber through the water inlet. The outer wall of the wastewater chamber is provided with a wastewater inlet, and the wastewater channel is connected to the wastewater chamber through the wastewater inlet. The lower end of the connecting cavity has a connecting port for connecting to the hollow flow channel.

5. The ceramic valve core backwash filter according to any one of claims 2 to 4, characterized in that, The rotating part includes: A cover body, wherein at least one flow groove is provided on the cover body; A driving component is connected to the cover body to drive the cover body to rotate, thereby switching the valve body to a backwash state or a filtration state. In the filtration state, the first opening and the third opening are connected through the flow channel, and the cover body blocks the second opening. In the backwash state, the second opening and the third opening are connected through the flow channel, and the cover body blocks the first opening.

6. The ceramic valve core backwash filter according to claim 5, characterized in that, The driving component includes: A connecting rod is disposed at the top of the cover, and the top of the connecting rod extends through the upper housing. An operating handle is detachably connected to the top of the connecting rod.

7. The ceramic valve core backwash filter according to claim 5, characterized in that, A water inlet is formed between the top of the valve body and the inner wall of the upper housing, and the water inlet is connected to the flow channel. Alternatively, the bottom of the cover is recessed and extends inward to form a water inlet cavity inside the cover, and the water inlet cavity is connected to the flow channel. Specifically, when the valve body is in the backwashing state, the upper water chamber connects the wastewater chamber and the connecting chamber through the flow channel; when the valve body is in the filtration state, the upper water chamber connects the inlet chamber and the connecting chamber through the flow channel.

8. The ceramic valve core backwash filter according to claim 1, characterized in that, The filter material has a roll-shaped structure, and the center of the filter material extends vertically to form the hollow flow channel.

9. The ceramic valve core backwash filter according to claim 1, characterized in that, A mounting post is provided between the bottom of the filter material and the bottom wall of the lower housing. The air bladder has an annular structure, with a mounting hole formed in the middle of the air bladder, so that the air bladder can be fitted 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 upper and lower ends of the filter material abut against the upper housing and the support ribs, respectively, so as to form an accommodating space between the lower end of the filter material and the bottom wall of the lower housing, and the air bag is placed in the accommodating space.

10. The ceramic valve core backwash filter according to claim 1, characterized in that, The central axis of the water inlet channel extends horizontally, and the central axis of the wastewater channel extends horizontally, with the central axis of the wastewater channel being perpendicular to the central axis of the water inlet channel.

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