Integrated anti-backflow water inlet filter

Abstract

The utility model relates to an integrated anti-backflow water inlet filter, which comprises a filter shell and a filter end cover, the filter shell is detachably connected with the filter end cover, a first filter screen is arranged in the filter shell, a second filter screen is arranged in the first filter screen, and the filter end cover is detachably connected with the first filter screen. An anti-reflux assembly is arranged between the interior of the second filter screen and the bottom of the filter shell; according to the utility model, the second filter screen is arranged, and the anti-reflux assembly is arranged in the first filter screen, so that the space is further saved, the space in the filter shell is effectively utilized, and the whole filter has the characteristic of integration while the performance is improved or the functions are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an integrated anti-backflow water inlet filter. Background Art

[0002] Currently, due to the varying residence times in the pipeline, a large amount of sediment, algae, rust and other impurities generally exist in the tap water of municipal companies. The transmission of domestic water usually relies on water pipes. At present, most of the water inlet pipes of washing machines and household appliances are hoses. During use, the water inlet pipe is always connected to the tap water faucet. Therefore, a pre-filter is needed to filter some impurities in the tap water.

[0003] The authorized announcement number is CN220345292U, which discloses a small pre-filter with a check valve. Combining its specification and drawings, its solution includes a valve head, a bottle body, and a filter cartridge. The filter cartridge is arranged inside the bottle body. A sleeve hole seat communicating with the inner hexagonal through hole of the fastener is arranged inside the valve head, and a check valve is inserted into the sleeve hole seat. However, the check valve is arranged inside the valve head, and the filter cartridge is arranged inside the bottle body, resulting in a waste of internal space and bringing inconvenience to the current product integration or miniaturization. Summary of the Invention

[0004] The utility model mainly aims at the problems existing during the use of the water inlet pipeline, and invents an integrated anti-backflow water inlet filter. The design of arranging the second filter screen and the anti-backflow component inside the first filter screen further saves space, which is beneficial to the integrated characteristics of the whole filter while improving the performance; since the anti-backflow component is arranged inside the second filter screen, even if the filter end cover is damaged, the filter structure and the anti-backflow structure inside the filter housing are still normal.

[0005] The invention object of the utility model is realized through the following technical solutions: an integrated anti-backflow water inlet filter, including a filter housing and a filter end cover, the filter housing and the filter end cover are detachably connected, a first filter screen is arranged inside the filter housing, a second filter screen is arranged inside the first filter screen, and an anti-backflow component is arranged between the inside of the second filter screen and the bottom of the filter housing.

[0006] Preferably, the inside of the first filter screen is filled with particulate matter capable of pressing the second filter screen tightly. This setting is to fill the inside of the first filter screen with particulate matter having a filtering function.

[0007] Preferably, the particulate matter is activated carbon or calcium sulfite. This setting is to improve the filtering effect of the filter on water quality.

[0008] Preferably, a first threaded inner groove is provided on one side of the filter end cover, a first threaded boss is provided on the other side of the filter end cover, and a second threaded boss is provided on one side of the filter housing, and the second threaded boss is connected to the inside of the first threaded inner groove.

[0009] Preferably, a first annular boss and a second annular boss are provided on one side of the interior of the filter housing, a gap between the first annular boss and the second annular boss is a first limiting groove, and a plurality of first limiting bosses are provided on the other side of the interior of the filter housing, one end of the first filter screen is inserted into the first limiting groove, and the other end of the first filter screen is supported by the first limiting boss. This arrangement is to achieve detachable fixation of the first filter screen.

[0010] Preferably, the bottom of the second filter screen is fitted to the top of the second annular boss, and a plurality of rectangular bosses are provided on the side of the second filter screen, each of which is fitted to the inside of the first filter screen.

[0011] Preferably, a filter inner groove is provided inside the second filter screen, one end of the anti-backflow component is stuck in the filter inner groove, and the other end is stuck in the bottom of the filter housing. This arrangement is to achieve detachable fixation of the anti-backflow component.

[0012] Preferably, the anti-backflow assembly includes an anti-backflow shell, an anti-backflow circular plate, a support column and a metal spring. A diversion hole is opened in the middle of the anti-backflow shell, and a plurality of support columns are arranged toward the center of the anti-backflow shell. An annular groove is arranged at the end of the support column. A guide column is arranged on the surface of the anti-backflow circular plate, and the guide column is slidably connected to the inside of the annular groove. A metal spring is arranged between the anti-backflow circular plate and the support column.

[0013] Preferably, a second threaded inner groove is provided on the other side of the filter housing, the internal threads of the second threaded inner groove are connected to a water inlet joint, and a third threaded inner groove is provided inside the water inlet joint. This arrangement is to enable the water inlet joint to be connected to an external water inlet pipeline.

[0014] Compared with the prior art, the utility model has the following beneficial effects: 1. The second filter screen setting and the design of the anti-backflow component inside the first filter screen further save space and effectively utilize the space inside the filter housing, which is beneficial for the entire filter to have the characteristics of integration while improving performance or increasing functions; 2. Since the anti-backflow component is arranged inside the second filter screen, compared with setting the anti-backflow component inside the filter end cover, even if the filter end cover is damaged, the filtering structure and anti-backflow structure inside the filter housing are still normal, which brings convenience during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the present utility model;

[0016] Figure 2 is a cross-sectional view of the present utility model;

[0017] Figure 3 is a cross-sectional view after the explosion of the present utility model;

[0018] Figure 4 is a cross-sectional view of the anti-backflow component of the present utility model.

[0019] Reference numerals in the figure: 1, filter housing; 11, second threaded boss; 12, first annular boss; 13, second annular boss; 14, first limiting groove; 15, first limiting boss; 16, second internal threaded groove; 2, filter end cap; 21, first internal threaded groove; 22, first threaded boss; 3, first filter screen; 4, second filter screen; 41, rectangular boss; 42, internal groove of the filter screen; 5, anti-backflow component; 51, anti-backflow housing; 52, support column; 53, annular sliding groove; 54, anti-backflow circular plate; 55, guiding column; 56, metal spring; 511, guiding through hole; 6, water inlet joint; 61, third internal threaded groove. Detailed implementation manners

[0020] The present utility model will be further described below in conjunction with the embodiments shown in the drawings:

[0021] As Figures 1 to 4 shown, an integrated anti-backflow water inlet filter includes a filter housing 1 and a filter end cap 2. The filter housing 1 and the filter end cap 2 are detachably connected. Specifically, one side of the filter end cap 2 is provided with a first internal threaded groove 21, the other side of the filter end cap 2 is provided with a first threaded boss 22, one side of the filter housing 1 is provided with a second threaded boss 11, the second threaded boss 11 is connected to the inside of the first internal threaded groove 21, the other side of the filter housing 1 is provided with a second internal threaded groove 16, and the inside of the second internal threaded groove 16 is threadedly connected with a water inlet joint 6. The inside of the water inlet joint 6 is provided with a third internal threaded groove 61. After such a setting, the three-section disassembly design of the filter housing 1, the filter end cap 2 and the water inlet joint 6 is convenient for the user's later assembly and maintenance, and the third internal threaded groove 61 on the water inlet joint 6 is convenient for connecting to the water inlet pipeline.

[0022] In this embodiment, a first filter screen 3 is provided inside the filter housing 1, a second filter screen 4 is provided inside the first filter screen 3, the first filter screen 3 is filled with particulate matter that can compress the second filter screen 4, and the particulate matter is activated carbon or calcium sulfite. Activated carbon is selected because it has a well-developed internal pore structure, a large specific surface area, and excellent adsorption performance. These characteristics enable activated carbon to effectively remove harmful substances such as odor, chlorine, cyanide and various heavy metal ions in water. Calcium sulfite is selected to remove residual chlorine in water, including combined residual chlorine and free residual chlorine. A first annular boss 12 and a second annular boss 13 are provided on one side of the interior of the filter housing 1, and the gap between the first annular boss 12 and the second annular boss 13 is a first limiting groove 14. A plurality of first annular bosses 12 and 13 are provided on the other side of the interior of the filter housing 1. A limiting boss 15, one end of the first filter 3 is inserted into the first limiting groove 14, the other end of the first filter 3 is supported by the first limiting boss 15, the bottom of the second filter 4 is attached to the top of the second annular boss 13, and the side of the second filter 4 is provided with a plurality of rectangular bosses 41, each of the rectangular bosses 41 is attached to the inside of the first filter 3. After such arrangement, the double filter design of the first filter 3 and the second filter 4 makes the entire filter have a better filtering effect, and the particles of activated carbon or calcium sulfite make the water quality entering the washing machine purer, and can be better mixed with the laundry detergent for cleaning when washing clothes, and the design of the second filter 4 being arranged inside the first filter 3 further saves space, which is conducive to the integration of the entire filter while improving performance.

[0023] In this embodiment, an anti-backflow component 5 is provided between the interior of the second filter screen 4 and the bottom of the filter housing 1. Specifically, a filter screen inner groove 42 is provided inside the second filter screen 4. One end of the anti-backflow component 5 is stuck in the filter screen inner groove 42, and the other end is stuck to the bottom of the filter housing 1. The anti-backflow component 5 includes an anti-backflow housing 51, an anti-backflow circular plate 54, a support column body 52, and a metal spring 56. A flow guiding through hole 511 is provided in the middle of the anti-backflow housing 51. A number of support column bodies 52 are provided on the anti-backflow housing 51 in the direction towards the center. An annular sliding groove 53 is provided at the end of the support column body 52. A guiding column body 55 is provided on the surface of the anti-backflow circular plate 54. The guiding column body 55 is slidably connected to the inside of the annular sliding groove 53. A metal spring 56 is provided between the anti-backflow circular plate 54 and the support column body 52. After such a setting, whenever water flows from top to bottom, the water will impact the anti-backflow circular plate 54, causing the guiding column body 55 to slide inside the annular sliding groove 53. In this way, there will be a gap between the top of the anti-backflow circular plate 54 and the anti-backflow housing 51, and the water can move downward normally. However, if the water flows backward from bottom to top, the water will also impact the anti-backflow circular plate 54, causing it to fit against the flow guiding through hole 511 and completely block it. During this process, the metal spring 56 on the support column body 52 provides a guiding effect to drive the guiding column body 55 to slide upward inside the annular sliding groove 53.

[0024] Working principle and usage method of the present utility model:

[0025] First, the third internal thread groove 61 on the water inlet joint 6 is connected to the water inlet pipeline. Then, the water will flow downward from the through hole on the water inlet joint 6 until it enters the interior of the filter housing 1. When entering, it will pass through the first filter screen 3 and the second filter screen 4 in sequence. This double-filter screen design makes the whole filter have a better filtering effect. Coupled with the particulate matter of activated carbon or calcium sulfite, the water quality entering the washing machine is made purer, and it can better blend with the washing liquid during washing for cleaning. After the water passes through the first filter screen 3 and the second filter screen 4 in sequence, the water will impact the anti-backflow circular plate 54 inside the anti-backflow housing 51, causing the guiding column body 55 to slide inside the annular sliding groove 53. In this way, there will be a gap between the top of the anti-backflow circular plate 54 and the anti-backflow housing 51, and the water can move downward normally. However, if the water flows backward from bottom to top, the water will also impact the anti-backflow circular plate 54, causing it to fit against the flow guiding through hole 511 and completely block it. During this process, the metal spring 56 on the support column body 52 provides a guiding effect to drive the guiding column body 55 to slide upward inside the annular sliding groove 53.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. An integrated anti-backflow water inlet filter, comprising a filter housing (1) and a filter end cover (2), characterized in that: The filter housing (1) and the filter end cover (2) are detachably connected; a first filter screen (3) is provided inside the filter housing (1); a second filter screen (4) is provided inside the first filter screen (3); and a backflow prevention component (5) is provided between the inside of the second filter screen (4) and the bottom of the filter housing (1).

2. The integrated anti-backflow water inlet filter according to claim 1, characterized in that: The interior of the first filter screen (3) is filled with particles capable of compacting the second filter screen (4).

3. The integrated anti-backflow water inlet filter according to claim 2, characterized in that: The particulate matter is activated carbon or calcium sulfite.

4. The integrated anti-backflow water inlet filter according to claim 3, characterized in that: A first threaded inner groove (21) is provided on one side of the filter end cover (2), a first threaded boss (22) is provided on the other side of the filter end cover (2), and a second threaded boss (11) is provided on one side of the filter housing (1), the second threaded boss (11) being connected to the inside of the first threaded inner groove (21).

5. The integrated anti-backflow water inlet filter according to claim 4, characterized in that: A first annular boss (12) and a second annular boss (13) are provided on one side of the interior of the filter housing (1); a gap between the first annular boss (12) and the second annular boss (13) is a first limiting groove (14); a plurality of first limiting bosses (15) are provided on the other side of the interior of the filter housing (1); one end of the first filter screen (3) is inserted into the first limiting groove (14), and the other end of the first filter screen (3) is held against by the first limiting boss (15).

6. The integrated anti-backflow water inlet filter according to claim 5, characterized in that: The bottom of the second filter screen (4) is fitted to the top of the second annular boss (13), and a plurality of rectangular bosses (41) are provided on the side of the second filter screen (4), each of the rectangular bosses (41) being fitted to the inside of the first filter screen (3).

7. The integrated anti-backflow water inlet filter according to claim 6, characterized in that: The second filter screen (4) is provided with a filter screen inner groove (42) inside, and one end of the anti-backflow component (5) is clamped in the filter screen inner groove (42), and the other end is clamped in the bottom of the filter housing (1).

8. The integrated anti-backflow water inlet filter according to claim 7, characterized in that: The backflow prevention assembly (5) comprises a backflow prevention shell (51), a backflow prevention circular plate (54), a support column (52) and a metal spring (56); a flow guide hole (511) is provided in the middle of the backflow prevention shell (51); a plurality of support columns (52) are provided in the center direction of the backflow prevention shell (51); an annular groove (53) is provided at the end of the support column (52); a guide column (55) is provided on the surface of the backflow prevention circular plate (54); the guide column (55) is slidably connected to the inside of the annular groove (53); and a metal spring (56) is provided between the backflow prevention circular plate (54) and the support column (52).

9. The integrated anti-backflow water inlet filter according to claim 4, characterized in that: A second threaded inner groove (16) is provided on the other side of the filter housing (1), the inner thread of the second threaded inner groove (16) is connected to a water inlet joint (6) through internal threads, and a third threaded inner groove (61) is provided inside the water inlet joint (6).

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