Backwashing structure and water-saving water purifier

Abstract

The utility model belongs to the technical field of water purification equipment, and particularly relates to a backwashing structure and a water-saving water purifier. Comprising a shell, a filtering piece and an electromagnetic valve, a filtering cavity is formed in the shell, and a water inlet and a water outlet which are communicated with the filtering cavity are formed in the two ends of the shell; the filter sheet is arranged in the filter cavity to form a first cavity and a second cavity which are separated by the filter sheet; an air blowing opening and an air suction opening are formed in the side wall of the shell, the air blowing opening is located in the side, close to the water outlet, of the filter piece, the air suction opening is located in the side, close to the water inlet, of the filter piece, and the air blowing opening and the air suction opening are communicated with a backwashing air pump through a connecting pipeline; in the application, after the water inlet and the water outlet are closed, the backwashing air pump is controlled to operate, blows air to the second cavity, sucks air to the first cavity, and performs backwashing on the filter; the whole structure is relatively simple, the filter element replacement treatment can be replaced, and the use cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of water purification equipment, specifically relating to a backwashing structure and a water-saving water purifier. Background Technology

[0002] Water purifiers typically use ultrafiltration technology to purify water, resulting in water that is safe for direct drinking and use in daily life. The ultrafiltration membranes used are generally microporous membranes with pore sizes in the micrometer range. After prolonged use, a large amount of impurities accumulate on the surface of the filter membrane, affecting water flow and filtration efficiency. Water-saving machines typically refer to devices or appliances that achieve water conservation through various technological means; common examples include water-saving purifiers and integrated water control systems. Traditional water purifiers do not have a built-in flushing function; when excessive impurities remain on the filter membrane, the only solution is to replace the filter cartridge, which is costly. Further improvements are necessary. Utility Model Content

[0003] The purpose of this utility model is to provide a backwashing structure and a water-saving water purifier to solve the problem that existing water purifiers do not have a built-in backwashing function and that the regular replacement of filter cartridges results in high operating costs.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] A backwashing structure includes a housing, a filter element, and a solenoid valve. The housing contains a filter chamber, and its two ends have an inlet and an outlet connected to the filter chamber. The filter element is disposed within the filter chamber, forming a first cavity and a second cavity separated by the filter element. The side wall of the housing has an air blowing port and an air suction port. The air blowing port is located on the side of the filter element closer to the outlet, and the air suction port is located on the side of the filter element closer to the inlet. The air blowing port and the air suction port are connected to a backwashing air pump via connecting pipes. The backwashing air pump is electrically connected to a controller, which is electrically connected to the solenoid valve. The solenoid valve is installed at the inlet and the outlet.

[0006] In this invention, during normal use, the solenoid valves at the inlet and outlet of the backwashing structure are open, allowing water to enter the filter chamber of the housing, be filtered by the filter plates, and then discharged from the outlet. After a certain period, impurities accumulate on the filter plates, requiring cleaning. At this time, the solenoid valves at the inlet and outlet are closed, and the backwashing air pump operates, pumping air in through the air outlet to backwash the filter plates in the filter chamber. Impurities are carried out by the air through the air intake, thus cleaning the filter plates. Because the micropores of the filter plates are at the micron level, air can more evenly and comprehensively blow away the clogging impurities, improving cleaning ability. Furthermore, the overall structure of the backwashing structure is relatively simple, highly practical, and has a low overall configuration cost.

[0007] Furthermore, the housing includes a first housing and a second housing. Locking lugs are provided on the outer walls of the first housing and the second housing. Connecting through holes are provided in a circumferential array on the locking lugs. The first housing and the second housing are connected and fixed by locking members passing through the connecting through holes. The air blowing port and the air inlet do not intersect with the connecting through holes.

[0008] The housing is divided into two sections, allowing for convenient installation of the filter element. Even when the filter element needs replacing, it can be easily replaced.

[0009] Furthermore, the second housing is a variable-diameter constriction structure with different aperture sizes, and the water outlet is located at the end with the smaller aperture.

[0010] Furthermore, the water outlet is connected to a water inlet pipe via a connector, and the water inlet pipe is used to connect to the inlet of the water purifier.

[0011] Furthermore, the side wall of the first housing is provided with an expansion port, which is used for draining wastewater and venting auxiliary air; a solenoid valve is also installed on the expansion port.

[0012] Furthermore, the housing has a mounting portion in the middle for mounting the filter element, which is either a groove recessed into the inner wall of the housing or a retaining ring protruding from the inner wall of the housing.

[0013] This utility model also provides a water-saving water purifier, including a housing and the backwashing structure. The housing is provided with an inlet and an outlet. The inlet is connected to the outlet of the housing, and the outlet is connected to a water pipe.

[0014] The utility model adopting the above technical solution has the following advantages compared with the prior art:

[0015] This utility model provides a backwashing structure. During backwashing, the solenoid valves at the inlet and outlet are closed, and the backwashing air pump operates, pumping air in through the air outlet to backwash the filter plates in the filter chamber. Impurities are carried out by the air through the air intake, thus cleaning the filter plates. Furthermore, the overall structure of the backwashing structure is relatively simple, highly practical, and inexpensive to configure. Attached Figure Description

[0016] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0017] Figure 1 This is one of the structural schematic diagrams of a backwashing structure according to an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the first housing in an embodiment of the present invention;

[0019] Figure 3 This is a left view of the first housing in an embodiment of the present invention;

[0020] Figure 4 This is a second schematic diagram of a backwashing structure according to an embodiment of the present invention;

[0021] Figure 5 This is the third schematic diagram of a backwashing structure according to an embodiment of the present invention;

[0022] Figure 6 This is a front view of a water-saving water purifier according to an embodiment of the present invention;

[0023] Figure 7 This is a right view of a water-saving water purifier according to an embodiment of the present invention;

[0024] The symbols for the main components are explained below:

[0025] 1. First housing; 2. First solenoid valve; 3. Water inlet; 4. First cavity; 5. Ultrafine filter; 6. Sealing ring; 7. Second cavity; 8. Water inlet pipe; 9. Second solenoid valve; 10. Water outlet; 11. Second housing; 12. Air outlet; 13. Air inlet valve; 14. Air outlet valve; 15. Air intake port; 16. Connecting through hole; 17. Third solenoid valve; 18. Filter sleeve; 19. Connector; 20. Housing; 21. Fourth solenoid valve; A. Water inlet. Detailed Implementation

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1-5 As shown, a backwashing structure according to an embodiment of the present invention includes a housing, a filter element, and a solenoid valve. The filter element is a 0.8-micron ultrafine filter element 5. A filter chamber is provided inside the housing, and the pore size of the filter chamber is Ø58.5mm. Inlet 3 and outlet 10 connected to the filter chamber are provided at both ends of the housing. The pore size of inlet 3 and outlet 10 is Ø18.5mm. An ultrafine filter 5 is disposed in the filter chamber to form a first cavity 4 and a second cavity 7 separated by the ultrafine filter 5; the side wall of the shell is provided with an air blowing port 12 and an air suction port 15. The air blowing port 12 is located on the side of the ultrafine filter 5 near the water outlet 10, and the air suction port 15 is located on the side of the ultrafine filter 5 near the water inlet 3. The aperture of the air blowing port 12 and the air suction port 15 is Ø5.0mm; the air blowing port 12 and the air suction port 15 are connected to a backwash air pump through a connecting pipe; the connecting pipe of the backwash air pump includes an air suction pipe and an air outlet pipe. The air outlet of the backwash air pump is connected to the air blowing port 12 through the air outlet pipe, and the air inlet of the backwash air pump is not connected to the pipe; or, the air suction port 15 is connected through the air suction pipe, and a filter screen is provided on the air suction pipe to prevent polluted air from entering the second cavity 7 through the air outlet pipe. The backwash air pump is electrically connected to a controller, which is electrically connected to solenoid valves. The solenoid valves are installed at the inlet 3 and outlet 10, and are designated as the first solenoid valve 2 and the second solenoid valve 9, respectively. The outlet 10 is connected to a water inlet pipe 8 via a connector 19. (Refer to...) Figure 6The water inlet pipe 8 is a 90° bend, used to connect to the inlet of the water purifier. When this backwashing structure is used in a water-saving water purifier, the controller is an IC card integrated water controller. During normal water filtration and purification, a pre-set backwashing cycle is used. The solenoid valves at the inlet 3 and outlet 10 are normally open, allowing water to enter the filtration chamber, pass through the ultra-micro filter 5, and then exit from the outlet 10. After the backwashing cycle is completed, the solenoid valves at the inlet 3 and outlet 10 are closed, and the backwashing air pump is activated. The air pump pumps air in through the air outlet 12 to backwash the ultra-micro filter 5, carrying impurities out through the air intake 15, thus cleaning the ultra-micro filter 5. This eliminates the need to replace the filter element, maintaining water quality for a certain period, improving water quality and convenience. Furthermore, the overall structure of the backwashing structure is relatively simple, highly practical, and has low configuration costs.

[0029] In fact, normally closed valves can be installed at the air inlet 12 and the air outlet 15 as the air intake valve 13 and the air exhaust valve 14. When there is no backwashing operation, the air intake valve 13 and the air exhaust valve 14 are closed; when backwashing is required, the air intake valve 13 and the air exhaust valve 14 are opened.

[0030] In fact, in this embodiment, a backwashing air pump can be connected to the air blowing port 12 as needed, and a third solenoid valve 17 can be installed at the air intake port 15. When the backwashing air pump is running, the third solenoid valve is controlled to open, so as to realize the flow of gas and blow away the impurities on the surface of the ultrafine filter 5 on one side of the first cavity 4.

[0031] In this embodiment, a mounting part for mounting the filter element is provided in the middle of the housing. The mounting part is a groove recessed into the inner wall of the housing or a retaining ring seat protruding from the inner wall of the housing. The retaining ring for fixing the filter element can be locked into the inner wall surface of the retaining ring seat.

[0032] For example, the housing includes a first housing 1 and a second housing 11. Locking lugs are provided on the outer walls of the first housing 1 and the second housing 11. Connecting through holes 16 are arranged in a circumferential array on the locking lugs, and the diameter of the connecting through holes 16 is Ø5mm. The first housing 1 and the second housing 11 are connected and fixed by locking components passing through the connecting through holes 16. The locking components include long bolts and nuts. To ensure the structural strength of the housing and to guarantee its functionality, the air inlet 12 and the air outlet 15 are designed not to intersect with the connecting through holes 16.

[0033] like Figure 2 , Figure 3As shown, in order to facilitate the sealing after the first housing 1 and the second housing 11 are connected, a semi-circular sealing groove is provided at the connection of the first housing 1 and the second housing 11. A sealing ring 6 can be installed in the sealing groove. After the first housing 1 and the second housing 11 are connected and fixed by long bolts and nuts, the connection of the first housing 1 and the second housing 11 is sealed.

[0034] like Figure 4 As shown, the second housing 11 is a variable-diameter constriction structure with different orifice sizes, and the outlet 10 is located at the end with the smaller orifice size. The variable-diameter constriction structure is formed by extruding a single tube, comprising a large cylinder, a conical cylinder, and a small cylinder; alternatively, the large cylinder, conical cylinder, and small cylinder can be welded together. A connector 19 is integrally provided at the outlet 10 (see reference). Figure 7 The inner diameters at both ends of connector 19 are different, which are adapted to the outer diameter of outlet 10 and the outer diameter of water inlet pipe.

[0035] Correspondingly, both the blowing port 12 and the suction port 15 can be opened in the second housing 11; the ultrafine filter 5 is installed in the second housing 11 through the filter sleeve 18 and is located between the blowing port 12 and the suction port 15; the first housing 1 is used as an end cap.

[0036] like Figure 5 As shown, in this embodiment, an expansion port can also be provided on the side wall of the first housing 1 as needed. The expansion port is used for draining wastewater and assisting in venting. A solenoid valve is also installed on the expansion port, specifically the fourth solenoid valve 21.

[0037] When the expansion port is used for wastewater discharge:

[0038] The first solenoid valve 2 and the fourth solenoid valve 21 are open, and the second solenoid valve 9 is closed. At the same time, the air inlet valve 13 and the exhaust valve 14 are opened, and air is pumped into the second chamber 7 through the backwash air pump to backwash the ultrafine filter 5. The waste gas is discharged from the air inlet 15. At the same time, the water inlet 3 also backwashes the ultrafine filter 5, and the waste water is discharged from the expansion port. All components work together to improve the backwashing effect of the ultrafine filter 5 through multiple flushing methods.

[0039] When the expansion port is used for auxiliary exhaust:

[0040] The first solenoid valve 2 and the second solenoid valve 9 are closed. At the same time, the fourth solenoid valve 21, the air inlet valve 13, and the exhaust valve 14 are opened. Air is pumped into the second chamber 7 through the backwash air pump to backwash the ultrafine filter 5. The exhaust gas is discharged from the air inlet 15 and the expansion port to backwash the ultrafine filter 5.

[0041] Example 2

[0042] A water-saving water purifier includes a housing 20 and a backwashing structure. The housing 20 is provided with an inlet and an outlet. The inlet is connected to the outlet 10 of the housing, and the outlet is connected to a water pipe.

[0043] The inlet water A of the backwashing structure is filtered through the ultra-micro filter 5 and transported from the outlet 10 to the tank 20 through the water inlet pipe 8.

[0044] This embodiment provides a backwashing structure. During water filtration, the solenoid valves (first solenoid valve 2 and second solenoid valve 9) at the inlet 3 and outlet 10 are open. Water A from the inlet 3 is fed into the filtration chamber, filtered by the ultrafine filter 5, and then discharged from the outlet 10. After the backwashing structure has been running for a period of time, impurities may accumulate on the ultrafine filter 5. The first solenoid valve 2 and the second solenoid valve 9 are closed, and the backwashing air pump operates, pumping air into the air outlet 12 to backwash the ultrafine filter 5 in the filtration chamber. The impurities are carried out by the air from the air intake 15, thus cleaning the ultrafine filter 5. The overall structure of the backwashing structure is relatively simple, highly practical, and has low configuration costs.

[0045] The foregoing has provided a detailed description of the backwashing structure provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A backwashing structure, comprising a housing, a filter element, and a solenoid valve, wherein a filter chamber is disposed within the housing, and an inlet and an outlet connected to the filter chamber are disposed at both ends of the housing; the filter element is disposed within the filter chamber to form a first chamber and a second chamber separated by the filter element; characterized in that, The side wall of the housing is provided with an air blowing port and an air suction port. The air blowing port is located on the side of the filter sheet near the water outlet, and the air suction port is located on the side of the filter sheet near the water inlet. The air blowing port and the air suction port are connected to a backwash air pump through a connecting pipe. The backwash air pump is electrically connected to a controller, and the controller is electrically connected to a solenoid valve. The solenoid valve is installed at the water inlet and the water outlet.

2. The backwashing structure according to claim 1, characterized in that, The housing includes a first housing and a second housing. Locking lugs are provided on the outer walls of the first housing and the second housing. Connecting through holes are arranged in a circumferential array on the locking lugs. The first housing and the second housing are connected and fixed by locking members passing through the connecting through holes. The air blowing port and the air inlet do not intersect with the connecting through holes.

3. The backwashing structure according to claim 2, characterized in that, The second housing is a variable-diameter constriction structure with different aperture sizes, and the water outlet is located at the end with the smaller aperture.

4. The backwashing structure according to claim 3, characterized in that, The water outlet is connected to a water inlet pipe via a connector, and the water inlet pipe is used to connect to the inlet of the water purifier.

5. The backwashing structure according to claim 2, characterized in that, The first housing has an expansion port on its side wall, which is used for draining wastewater and venting exhaust; a solenoid valve is also installed on the expansion port.

6. The backwashing structure according to claim 1, characterized in that, The housing has a mounting portion in the middle for mounting the filter element. The mounting portion is either a groove recessed into the inner wall of the housing or a retaining ring protruding from the inner wall of the housing.

7. A water-saving water purifier, characterized in that, The device includes a housing and a backwashing structure as described in any one of claims 1-6. The housing is provided with an inlet and an outlet. The inlet is connected to the outlet of the housing, and the outlet is connected to a water pipe.

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