Backflushing type self-cleaning filter

Abstract

The utility model belongs to the technical field of filtration, and particularly relates to a backflushing type self-cleaning filter which comprises a filter box and a box cover, the box cover is connected to the upper end of the filter box, a filter element is fixedly connected to the interior of the filter box, and the inner end and the outer end of the filter box are connected with filter mechanisms. According to the back-flushing type self-cleaning filter, during filtering, valves in the second liquid inlet pipe and the blow-off pipe are closed, valves in the first liquid inlet pipe and the liquid outlet pipe are opened, liquid to be filtered is injected into the first liquid inlet pipe, enters the filter box, is filtered by the filter element and then flows out of the liquid outlet pipe, and liquid on the outer side is filtered; valves in the first liquid inlet pipe and the liquid outlet pipe are closed, valves in the second liquid inlet pipe and the blow-off pipe are opened, clean water is injected into the first liquid inlet pipe, enters the second liquid inlet pipe and then flows into the inner bottom end of the filter tank, the filter element is backwashed, sewage generated by washing flows out of the blow-off pipe, and cleaning of the filter element is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a backwash type self-cleaning filter. Background Art

[0002] Commonly used air filters, such as filters used in vacuum cleaners, include a shell and a filter assembly; the shell is hollow; the filter assembly is bonded or ultrasonically welded on the side walls of the hollow part of the shell; the filter assembly includes an upper filter screen, filter material, and a lower filter screen; the upper filter screen and the lower filter screen are respectively arranged on the upper surface and the lower surface of the filter material.

[0003] In the filter of this structure, the shell is a plastic or rubber part and needs to be processed separately; it is then bonded or ultrasonically welded to the filter component. Due to the limitations of the product structure and processing technology, the filter component is prone to partial or complete detachment from the shell during use, causing the filter to fail.

[0004] For example, in a filter disclosed in Chinese patent CN202802977U, the shell does not need to be produced separately. The shell is directly solidified in a mold for producing the filter using liquid polyurethane resin glue. At the same time, the connection between the shell and the filter assembly is tight and stable and not easy to fall off. The utility model also provides a net bag on the upper surface of the upper filter to facilitate carrying the entire filter. The structure is simple and practical.

[0005] However, the filter is not easy to clean the internal filter.

[0006] For this reason, we urgently need to provide a kind of recoil type self-cleaning filter that is easy to clean. Utility Model Content

[0007] The utility model aims to provide a backwash self-cleaning filter to solve the problem that the filter proposed in the above background technology is inconvenient to clean the internal filter screen.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a backwash self-cleaning filter, comprising a filter box and a box cover, the box cover is connected to the upper end of the filter box, a filter element is fixedly connected to the inside of the filter box, and a filter mechanism is connected to the inner and outer ends of the filter box, the filter mechanism comprises a filter unit and a fixing unit, the filter unit is arranged at the inner and outer ends of the filter box, and the fixing unit is arranged at the upper end of the filter box.

[0009] The filter unit includes a first liquid inlet pipe, a liquid outlet pipe, a second liquid inlet pipe, a sewage pipe and a valve, wherein the first liquid inlet pipe is fixedly connected to the upper right end of the filter box, the liquid outlet pipe is fixedly connected to the middle position of the lower end of the filter box, the second liquid inlet pipe is fixedly connected to the middle position of the lower end of the first liquid inlet pipe, the sewage pipe is fixedly connected to the upper left end of the filter box, and the valve is fixedly connected to the inner left end of the first liquid inlet pipe, the inner upper end of the liquid outlet pipe, the inner upper end of the second liquid inlet pipe and the inner upper end of the sewage pipe.

[0010] A further improvement is that one end of the second liquid inlet pipe away from the first liquid inlet pipe is fixedly connected to the right side of the lower end of the filter box, so that by closing the valves in the first liquid inlet pipe and the liquid outlet pipe, and then opening the valves in the second liquid inlet pipe and the sewage pipe, water is injected into the first liquid inlet pipe, and after flowing into the second liquid inlet pipe through the first liquid inlet pipe, it will flow into the bottom end of the filter box to backwash the filter element.

[0011] A further improvement is that the right side of the upper end of the sewage pipe is located on the left side of the upper end of the filter element, so that the sewage generated after backwashing the filter element will be discharged from the sewage pipe.

[0012] A further improvement is that the fixing unit includes a rectangular frame, a spring, a clip and a fixing block, the rectangular frame is fixedly connected to the middle position of the upper front end of the filter box, the spring is fixedly connected to the inner front end of the rectangular frame, the clip is fixedly connected to the rear end of the spring, and the fixing block is fixedly connected to the middle position of the front side of the box cover.

[0013] A further improvement is that the outer side of the lower end of the buckle is slidably connected to the inner side of the rectangular frame, so that when the spring bounces, the lower end of the buckle can be driven to slide inside the rectangular frame.

[0014] A further improvement is that the outer upper end of the fixing block is slidably connected to the inner top end of the buckle, and the upper rear end of the filter box is hinged to the rear end of the box cover by a hinge, so that the buckle is pushed back by the spring rebound, driving the upper end of the buckle to slide to the outer upper end of the fixing block, so that the box cover can no longer be rotated upward.

[0015] A further improvement is that a rubber pad is fixedly connected to the lower edge of the box cover, so that after the box cover is fixed to the upper end of the filter box, the rubber pad on the lower side of the box cover contacts the upper side of the filter box, so that the contact between the filter box and the box cover can be kept sealed.

[0016] In summary, the present application discloses a backwash self-cleaning filter.

[0017] The technical solution closes the valves in the first liquid inlet pipe and the liquid outlet pipe, and then opens the valves in the second liquid inlet pipe and the sewage pipe, injects water into the first liquid inlet pipe, and flows into the second liquid inlet pipe through the first liquid inlet pipe, and then flows into the bottom end of the filter box, backwashing the filter element, flushing the dirt in the filter element from the filter element to the upper end of the filter element, and the generated sewage will be discharged from the sewage pipe, so that the filter element can be self-cleaned.

[0018] Furthermore, by pulling the buckle forward so that it is no longer located at the outer end of the fixing block, and then pulling the box cover upward so that it is away from the filter box, the filter element on the filter box can be inspected and repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of the main structure of the utility model;

[0020] Figure 2 This is a bottom view of the main structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the rectangular frame of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the filter box of the utility model.

[0023] In the figure: 1, filter box; 2, box cover; 3, filter element; 401, first liquid inlet pipe; 402, liquid outlet pipe; 403, second liquid inlet pipe; 404, sewage pipe; 405, valve; 501, rectangular frame; 502, spring; 503, buckle; 504, fixing block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A backwash self-cleaning filter comprises a filter box 1 and a box cover 2, the box cover 2 is connected to the upper end of the filter box 1, a filter element 3 is fixedly connected inside the filter box 1, and a filter mechanism is connected to the inner and outer ends of the filter box 1. The filter mechanism comprises a filter unit and a fixing unit. The filter unit is arranged at the inner and outer ends of the filter box 1, and the fixing unit is arranged at the upper end of the filter box 1.

[0028] The filter unit includes a first liquid inlet pipe 401, a liquid outlet pipe 402, a second liquid inlet pipe 403, a sewage pipe 404 and a valve 405. The first liquid inlet pipe 401 is fixedly connected to the upper right end of the filter box 1, the liquid outlet pipe 402 is fixedly connected to the middle position of the lower end of the filter box 1, the second liquid inlet pipe 403 is fixedly connected to the middle position of the lower end of the first liquid inlet pipe 401, the sewage pipe 404 is fixedly connected to the upper left end of the filter box 1, and the valve 405 is fixedly connected to the inner left end of the first liquid inlet pipe 401, the inner upper end of the liquid outlet pipe 402, the inner upper end of the second liquid inlet pipe 403 and the inner upper end of the sewage pipe 404.

[0029] One end of the second liquid inlet pipe 403 away from the first liquid inlet pipe 401 is fixedly connected to the right side of the lower end of the filter box 1. Thus, by closing the valve 405 in the first liquid inlet pipe 401 and the liquid outlet pipe 402, and then opening the valve 405 in the second liquid inlet pipe 403 and the sewage pipe 404, water is injected into the first liquid inlet pipe 401, and then flows into the second liquid inlet pipe 403 through the first liquid inlet pipe 401, and then flows into the bottom end of the filter box 1, and backwashes the filter element 3, and flushes the dirt in the filter element 3 from the filter element 3 to the upper end of the filter element 3.

[0030] The upper right side of the sewage pipe 404 is located at the upper left side of the filter element 3. Therefore, the sewage generated after the filter element 3 is backwashed will be discharged from the sewage pipe 404, so that the filter element 3 can be self-cleaned.

[0031] Embodiment 2:

[0032] On the basis of the first embodiment: the fixing unit includes a rectangular frame 501, a spring 502, a buckle 503 and a fixing block 504, the rectangular frame 501 is fixedly connected to the middle position of the upper front end of the filter box 1, the spring 502 is fixedly connected to the inner front end of the rectangular frame 501, the buckle 503 is fixedly connected to the rear end of the spring 502, and the fixing block 504 is fixedly connected to the middle position of the front side of the box cover 2. The outer side of the lower end of the buckle 503 is slidably connected to the inner side of the rectangular frame 501. Therefore, when the spring 502 bounces, the lower end of the buckle 503 can be driven to slide inside the rectangular frame 501, thereby limiting the movement of the buckle 503.

[0033] The upper outer end of the fixing block 504 is slidably connected to the inner top end of the buckle 503, and the upper rear end of the filter box 1 is hinged to the rear end of the box cover 2. Therefore, by pulling the buckle 503 forward, the box cover 2 is rotated to the upper end of the filter box 1, and then the buckle 503 is released, and the spring 502 rebounds and pushes the buckle 503 backward, driving the upper end of the buckle 503 to slide to the upper outer end of the fixing block 504, so that the box cover 2 can no longer rotate upward, so that the box cover 2 is fixed to the upper end of the filter box 1.

[0034] A rubber pad is fixedly connected to the lower edge of the box cover 2. After the box cover 2 is fixed to the upper end of the filter box 1, the rubber pad on the lower side of the box cover 2 contacts the upper side of the filter box 1, so that the contact between the filter box 1 and the box cover 2 can be kept sealed, preventing liquid from leaking from the contact between the filter box 1 and the box cover 2 during the filtering process.

[0035] Working principle: During filtration, close the valve 405 inside the second liquid inlet pipe 403 and the sewage pipe 404, open the valve 405 in the first liquid inlet pipe 401 and the liquid outlet pipe 402, inject the liquid to be filtered into the first liquid inlet pipe 401 and enter the filter box 1, and then flow out from the liquid outlet pipe 402 after being filtered by the filter element 3, filtering the outer liquid. After the filtration is completed, close the valve 405 in the first liquid inlet pipe 401 and the liquid outlet pipe 402, open the valve 405 in the second liquid inlet pipe 403 and the sewage pipe 404, inject clean water into the first liquid inlet pipe 401, enter the second liquid inlet pipe 403, and then flow into the inner bottom end of the filter box 1, backwash the filter element 3, and the sewage generated by the flushing will flow out from the sewage pipe 404 again to complete the cleaning of the filter element 3.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A backwash self-cleaning filter, comprising a filter box (1) and a box cover (2), wherein the box cover (2) is connected to the upper end of the filter box (1), characterized in that: The filter box (1) has a filter element (3) fixedly connected to its interior, and the filter box (1) has a filter mechanism connected to its inner and outer ends, the filter mechanism comprising a filter unit and a fixing unit, the filter unit being arranged at the inner and outer ends of the filter box (1), and the fixing unit being arranged at the upper end of the filter box (1); The filter unit comprises a first liquid inlet pipe (401), a liquid outlet pipe (402), a second liquid inlet pipe (403), a sewage pipe (404) and a valve (405); the first liquid inlet pipe (401) is fixedly connected to the upper right end of the filter box (1); the liquid outlet pipe (402) is fixedly connected to the middle position of the lower end of the filter box (1); the second liquid inlet pipe (403) is fixedly connected to the middle position of the lower end of the first liquid inlet pipe (401); the sewage pipe (404) is fixedly connected to the upper left end of the filter box (1); and the valve (405) is fixedly connected to the inner left end of the first liquid inlet pipe (401), the inner upper end of the liquid outlet pipe (402), the inner upper end of the second liquid inlet pipe (403) and the inner upper end of the sewage pipe (404).

2. A backwash self-cleaning filter according to claim 1, characterized in that: One end of the second liquid inlet pipe (403) away from the first liquid inlet pipe (401) is fixedly connected to the right side of the lower end of the filter box (1).

3. A backwash self-cleaning filter according to claim 1, characterized in that: The upper right end of the sewage discharge pipe (404) is located on the upper left end of the filter element (3).

4. A backwash self-cleaning filter according to claim 1, characterized in that: The fixing unit comprises a rectangular frame (501), a spring (502), a buckle (503) and a fixing block (504); the rectangular frame (501) is fixedly connected to the middle position of the upper front end of the filter box (1); the spring (502) is fixedly connected to the inner front end of the rectangular frame (501); the buckle (503) is fixedly connected to the rear end of the spring (502); and the fixing block (504) is fixedly connected to the middle position of the front side of the box cover (2).

5. A backwash self-cleaning filter according to claim 4, characterized in that: The outer side of the lower end of the buckle (503) is slidably connected to the inner side of the rectangular frame (501).

6. A backwash self-cleaning filter according to claim 4, characterized in that: The outer upper end of the fixing block (504) is slidably connected to the inner top end of the buckle (503), and the upper rear end of the filter box (1) is hinged to the rear end of the box cover (2) via a hinge.

7. A backwash self-cleaning filter according to claim 4, characterized in that: A rubber pad is fixedly connected to the lower edge of the box cover (2).

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