Combined plate type air filter capable of being flushed by back flow

Abstract

The invention discloses a combined plate type air filter capable of backwashing, which comprises a filter shell, pressing rings, filter plates and a front cover plate, a plurality of layers of filter plates are fixedly mounted in the filter shell through the pressing rings, filter convex holes protruding forwards are arranged on the filter plates in an array manner, and the filter convex holes of the adjacent layers of filter plates are correspondingly arranged in a staggered manner. The outer walls of the filtering convex holes are provided with dust blocking arc structures, the inlet end faces of the filtering convex holes are tangent to the dust blocking arc structures, the front cover plate is installed on the front side face of the filtering shell, air inlet holes are formed in the front cover plate in an array mode, and the air inlet holes and the filtering convex holes in the filtering plate located in the most front row are arranged in a staggered mode. Impurity discharge ports are formed in the positions, corresponding to the positions between the adjacent filter plates, of the bottoms of the pressing rings, and through ports vertically corresponding to the impurity discharge ports are formed in the bottom of the filter shell.

Description

Technical Field

[0001] This invention belongs to the field of filter technology, specifically relating to a backflow-washable combined plate air filter. Background Technology

[0002] Currently, conventional air filtration typically uses filters to adsorb dust, which leads to dust accumulation inside the filter. After a certain period of time, the filter needs to be replaced, which is cumbersome, has high component costs, and requires more frequent replacements when the dust content is high, resulting in poor filtration performance in dusty conditions. Summary of the Invention

[0003] The present invention aims to provide a combined plate air filter with backflow washability, which has good filtration effect and can be backflow washed, thus solving the problem of cumbersome operation and high component cost caused by the need to replace the filter screen after a certain period of time when the filter screen is used to absorb dust.

[0004] Therefore, the technical solution adopted by the present invention is as follows: a combined plate air filter with backflow washability, comprising a filter housing, a pressure ring, filter plates and a front cover plate. Several layers of filter plates are fixedly installed in the filter housing by the pressure ring. The filter plates are arranged in an array with forward-protruding filter holes, and the filter holes of adjacent filter plates are staggered and corresponding. The outer wall of the filter holes is provided with a dust-blocking arc structure. The inlet end face of the filter holes is tangent to the dust-blocking arc structure. The front cover plate is installed on the front side of the filter housing and is arranged in an array with air inlets. The air inlets are staggered with the filter holes on the frontmost filter plate. The bottom of the pressure ring is provided with an impurity discharge outlet between adjacent filter plates. The bottom of the filter housing is provided with a through-hole corresponding to the impurity discharge outlet. When airflow carrying impurities flows in from the front side of the filter housing, it is filtered by the filter holes on the filter plates and flows out from the rear side. Impurities fall out from the impurity discharge outlet and the through-hole.

[0005] As a preferred embodiment of the above solution, the dust-blocking arc structure is a semi-circular arc structure, which effectively prevents dust from crossing the arc edge and entering the filter protrusion. It ensures that the air forms a small backflow within the semi-circular arc, making it difficult for dust to accumulate and causing it to fall downwards. The structure is ingeniously designed.

[0006] A further preferred embodiment is that the dust-blocking arc structure is a horizontal arc structure extending forward and outward, with a clever structural design that effectively prevents dust from crossing the arc edge and entering the filter pores.

[0007] More preferably, the filter housing has an overall square frame structure, the front cover is threaded onto the front side of the filter housing, and the pressure ring is a rubber square ring.

[0008] More preferably, the filter plate has no less than 4 layers, and the air inlet holes are arranged in five rows and five columns.

[0009] A further preferred embodiment is that the air inlet has a tapered structure that is larger at the front and smaller at the back, so that the airflow can be accelerated as it enters from wide to narrow, ensuring that the air velocity inside the filter is not low and preventing the accumulation of small backflow dust.

[0010] The beneficial effects of this invention are:

[0011] (1) The airflow forms a small backflow in the dust-blocking arc structure. When dust accumulates in the dust-blocking arc structure, it will be blown away. However, the inlet end face of the filter protrusion is tangent to the dust-blocking arc structure. Thus, most dust cannot cross the arc edge to enter the filter protrusion. Therefore, the dust can only go down under its own weight. Even if some dust enters the filter protrusion, it can be filtered out layer by layer in this way. The filtration effect is good and it is suitable for scenarios with high dust concentration. The structure design is ingenious.

[0012] (2) Due to its structural features, the perforated filter plate can pass media such as air in reverse to achieve reverse cleaning. If there are dead corners in the air intake for a long time, dust will accumulate and cannot be cleaned. By passing air in the reverse direction, the stubborn dust attached to the filter plate can be effectively cleaned, reducing the need for component replacement, ensuring that there is no internal airflow blockage, and extending the service life of the filter. No maintenance is required in daily use, and the maintenance cost is low. In addition, the structure of this solution is simple, and if internal parts need to be replaced, disassembly and assembly are very simple.

[0013] In summary, the present invention has advantages such as good filtration effect, low maintenance cost, and applicability to scenarios with high dust concentration. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 for Figure 1 The right view.

[0016] Figure 3 This is a schematic diagram showing the airflow direction within a combined panel air filter. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0018] Combination Figure 1 — Figure 3 As shown, a backflow-washable combined plate air filter consists of a filter housing 1, a pressure ring 2, a filter plate 3, and a front cover plate 4.

[0019] The filter housing 1 has an overall square frame structure.

[0020] The front cover plate 4 is threaded onto the front side of the filter housing 1.

[0021] Several layers of filter plates 3 are fixedly installed inside the filter housing 1 by pressure rings 2.

[0022] The pressure ring 2 is preferably made of rubber square ring.

[0023] An impurity discharge port 21 is provided at the bottom of the pressure ring 2 between the adjacent filter plates 3.

[0024] The bottom of the filter housing 1 is provided with an opening 11 that corresponds to the impurity discharge outlet 21.

[0025] The filter plate 3 preferably has no fewer than 4 layers.

[0026] The filter plates 3 are arranged in an array with forward-protruding filter holes 31, and the filter holes 31 of adjacent filter plates 3 are staggered and corresponding.

[0027] The outer wall of the filter protrusion 31 is provided with a dust-blocking arc-shaped structure 311.

[0028] The inlet end face of the filter protrusion 31 is tangent to the dust-blocking arc structure 311.

[0029] The dust-blocking arc structure 311 can be in the form of a semi-circular arc structure.

[0030] The dust-blocking arc structure 311 can also be a horizontal arc structure extending forward and outward.

[0031] The front cover plate 4 is installed on the front side of the filter housing 1, and the air inlet holes 41 are arranged in an array.

[0032] The air inlet 41 is staggered with the filter protrusions 31 on the frontmost filter plate 3.

[0033] The air intake 41 preferably adopts a five-row, five-column configuration.

[0034] The air intake 41 has a tapered structure that is larger at the front and smaller at the back.

[0035] When the airflow carrying impurities flows in from the front of the filter housing 1, it is filtered by the filter protrusions 31 on the filter plate 3 and flows out from the rear. The impurities fall out from the impurity discharge port 21 and the outlet 11.

[0036] Gas flows in through the air inlet and passes through the air inlet hole 41 of the front cover plate 4 to reach the inside of the filter. When the gas containing impurities flows through the filter plate 3, the impurities are blocked outside the filter protrusions 31. When the impurities are discharged, they do not affect other filter protrusions 31. The filtered medium flows into the next layer of filter plate 3 to continue filtering.

[0037] The gas flows out of the outlet after being filtered through the three layers of filter plates. The more layers of filter plates there are, the better the filtration effect. Each layer of filter plate 3 blocks the impurities carried by the gas outside the pores, thus achieving filtration at each layer.

[0038] When filter plate 3 needs to be cleaned, simply reverse the gas flow to achieve reverse cleaning.

Claims

1. A backflow-washable combined plate air filter, characterized in that: The filter housing includes a filter housing (1), a pressure ring (2), filter plates (3), and a front cover plate (4). Several layers of filter plates (3) are fixedly installed inside the filter housing (1) by the pressure ring (2). The filter plates (3) are arranged in an array with forward-protruding filter holes (31), and the filter holes (31) of adjacent filter plates (3) are staggered and corresponding. The outer wall of the filter holes (31) is provided with a dust-blocking arc structure (311). The inlet end face of the filter holes (31) is tangent to the dust-blocking arc structure (311). The front cover plate (4) is installed on the front side of the filter housing (1). The filter housing (1) has an air inlet (41) arranged in an array. The air inlet (41) is staggered with the filter protrusion (31) on the filter plate (3) located in the front row. The bottom of the pressure ring (2) is provided with an impurity outlet (21) between adjacent filter plates (3). The bottom of the filter housing (1) is provided with a through-hole (11) corresponding to the impurity outlet (21). When the airflow carrying impurities flows in from the front side of the filter housing (1), it is filtered by the filter protrusion (31) on the filter plate (3) and flows out from the rear side. Impurities fall out from the impurity outlet (21) and the through-hole (11).

2. The backflow-washable combined plate air filter according to claim 1, characterized in that: The dust-blocking arc structure (311) is a semi-circular arc structure.

3. The backflow-washable combined plate air filter according to claim 1, characterized in that: The dust-blocking arc structure (311) is an arc structure that extends horizontally forward and outward.

4. A backflow-washable combined plate air filter according to claim 1, characterized in that: The filter housing (1) has a square frame structure. The front cover plate (4) is threaded onto the front side of the filter housing (1). The pressure ring (2) is a rubber square ring.

5. A backflow-washable combined plate air filter according to claim 1, characterized in that: The filter plate (3) has no less than 4 layers, and the air inlet (41) has five rows and five columns.

6. A backflow-washable combined plate air filter according to claim 1, characterized in that: The air inlet (41) has a tapered structure that is larger in the front and smaller in the back.

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