Square double-core filter and dust remover

Abstract

The utility model provides a square double-core filter and a dust remover. The square double-core filter comprises at least one square filtering device, an upper end cover and a lower end cover, wherein the square filtering device is formed by combining a first filter core and a second filter core; the first filter element is in the shape of a hollow square cylinder, the second filter element is a hollow cylinder, the first filter element is nested outside the second filter element, a first clean chamber allowing airflow to pass through is formed between the first filter element and the second filter element, and a second clean chamber allowing airflow to pass through is formed in the second filter element; the upper end cover comprises a first fixing part, a second fixing part, a first connecting part and at least one upper end cover through hole; the lower end cover comprises a lower end cover fixing part and a lower end cover through hole; the square double-core filter disclosed by the utility model is relatively high in dust removal and filtering efficiency, the filter cores do not need to be frequently replaced, and the use and maintenance cost of the filter can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of dust removal and filtration, and particularly to a square double-core filter and a dust collector. Background Art

[0002] Dust removal and filtration is a relatively common air pollution control technology used to remove particulate matter and pollutants in gases. The dust removal and filtration of gases mainly utilize filters to intercept solid particulate matter in the gases. When the polluted gas enters the dust removal equipment through the air inlet, the filter in the dust removal equipment will intercept and capture the particulate matter in the gas. The particulate matter will be intercepted when passing through the filter element, so that the gas is purified, and the purified clean gas is discharged through the dust removal equipment. At the same time, as the use time goes by, the particulate matter intercepted inside the filter gradually thickens, which will affect the dust removal and filtration effect. Therefore, the filter needs to be cleaned regularly to remove the intercepted particulate matter.

[0003] Currently, the filters inside the dust removal equipment are mainly cylindrical. The air flow uniformly passes through the filter material from the outside of the cylinder around to the inside of the cylinder and is discharged from the inside. The cylindrical filter is simple to manufacture, the layout of the filter material is uniform, and the application range is wide. However, the filtering area of the cylindrical filter is small, and the filtering efficiency is affected to a certain extent. In addition, the traditional filter is mainly a single-filter-element filter. Since only one filter element is used for dust removal, it wears out quickly and needs to be replaced frequently, resulting in high use and maintenance costs. Summary of the Utility Model

[0004] In view of this, the utility model provides a square double-core filter and a dust collector to solve the problems of low filtering efficiency of the filter and high use and maintenance costs due to frequent replacement of the filter element in the prior art.

[0005] The embodiments of this specification provide the following technical solutions:

[0006] The utility model discloses a square double-core filter, which includes: at least one square filtering device composed of a first filter element and a second filter element, an upper end cover, and a lower end cover;

[0007] Wherein, the first filter element is in the shape of a hollow square cylinder, the second filter element is in the shape of a hollow cylinder, the first filter element is nested outside the second filter element, a first clean chamber for air flow to pass through is formed between the first filter element and the second filter element, and a second clean chamber for air flow to pass through is inside the second filter element;

[0008] The upper end cover includes a first fixing part, a second fixing part, a first connecting part, and at least one upper end cover through hole. The lower end surface of the first fixing part is connected to the first filter element, the lower end surface of the second fixing part is connected to the second filter element, the first connecting part is used to connect the first fixing part and the second fixing part, and the upper end cover through hole is opened between the first fixing part and the second fixing part;

[0009] The lower end cover includes a lower end cover fixing part and a lower end cover through hole. The upper end surface of the lower end cover fixing part is connected to the first filter element and the second filter element, and the lower end cover through hole is opened in the middle of the lower end cover fixing part.

[0010] Further, a first retaining groove and a second retaining groove are respectively provided on the lower end surfaces of the first fixing part and the second fixing part. The first retaining groove is used for inserting the first filter element so that the first filter element is fixed between the upper end cover and the lower end cover, and the second retaining groove is used for inserting the second filter element so that the second filter element is fixed between the upper end cover and the lower end cover.

[0011] Further, the first connecting part includes: at least one support bar, and the support bar connects the first fixing part and the second fixing part.

[0012] Further, the first filter element includes: a first side, a second side, and a first filter material, and the second filter element includes a third side, a fourth side, and a second filter material;

[0013] Wherein, the first side is arranged on the outer surface of the first filter element, the second side is arranged on the inner surface of the first filter element, and the first filter material is filled between the first side and the second side;

[0014] The third side is arranged on the outer surface of the second filter element, the fourth side is arranged on the inner surface of the second filter element, and the second filter material is filled between the third side and the fourth side.

[0015] Further, the upper end cover further includes: a handle, and the handle is arranged on the upper end surface of the first fixing part.

[0016] Further, the square double-core filter further includes: a connecting block. In the case where the square double-core filter has two or more of the square filtering devices, the connecting block is used to sequentially connect two or more of the square filtering devices up and down.

[0017] Furthermore, the connecting block includes: a third fixing part, a fourth fixing part, and a second connecting part;

[0018] The upper end surface of the third fixing part is connected to the first filter element in the square filter device located above the connecting block, and the upper end surface of the fourth fixing part is connected to the second filter element in the square filter device located above the connecting block; the lower end surface of the third fixing part is connected to the first filter element in the square filter device located below the connecting block, and the lower end surface of the fourth fixing part is connected to the second filter element in the square filter device located below the connecting block; the second connecting part is used to connect the third fixing part and the fourth fixing part.

[0019] Further, a third square groove and a fourth square groove are respectively provided on the upper end surface of the third fixing part and the upper end surface of the fourth fixing part, and a fifth square groove and a sixth square groove are respectively provided on the lower end surface of the third fixing part and the lower end surface of the fourth fixing part;

[0020] The third square groove and the fourth square groove are respectively used for plugging and fixing the first filter element and the second filter element in the square filter device located above the connecting block; the fifth square groove and the sixth square groove are respectively used for plugging and fixing the first filter element and the second filter element in the square filter device located below the connecting block.

[0021] In addition, the present utility model also discloses a dust collector, and the dust collector includes at least one backwashing device;

[0022] The square double-core filter as described in any one of the above aspects;

[0023] The backwashing device is arranged above the through hole of the upper end cover of the square double-core filter, and compressed air is blown into the interior of the square double-core filter through the through hole of the upper end cover.

[0024] Further, the backwashing device includes: a backwashing spray head, and the backwashing spray head sprays the compressed air generated by the backwashing device into the first clean chamber of the square double-core filter through the through hole of the upper end cover.

[0025] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of the present specification at least include:

[0026] 1. The utility model includes a square filter device composed of a first filter element and a second filter element. The square filter device is fixed between an upper end cover and a lower end cover. Among them, different from the commonly used cylindrical filter element of the filter element, the first filter element and the second filter element are approximately hollow square cylinders. Compared with the cylindrical filter element, the square cylinder filter element has a larger filtering area. At the same time, since the utility model adopts a double-filter element nested setting, the polluted air can enter the first clean room from the outside of the first filter element for dust removal filtration, and the polluted air can also enter the second clean room through the through hole of the lower end cover for dust removal filtration, and then enter the first clean room through the second filter element for re-filtration. Thus, the first and second filter elements can participate in the filtration of the polluted air at the same time, improving the filtration efficiency and the dust removal filtration rate. In addition, since there is an upper end cover through hole between the first and second fixing parts of the upper end cover, the upper end cover through hole can not only discharge the filtered clean air, but also enable the back-blowing device of the dust collector to blow compressed air into the first clean room through this through hole. The compressed air in the first clean room is blown into the second clean room through the second filter element, thereby cleaning the first filter element and the second filter element, and reducing the impact of accumulated dust on the dust removal filtration effect;

[0027] 2. The upper end cover and the lower end cover are respectively provided with a retaining groove for inserting and fixing the first filter element and the second filter element between the upper end cover and the lower end cover, making the structure of the square filter device more stable. The insertion method also facilitates disassembly, making it convenient to replace and maintain the first filter element and the second filter element;

[0028] 3. The connecting part of the upper end cover can include at least one support bar. The first fixing part and the second fixing part of the upper end cover are connected through the support bar, so that the first and second fixing parts fix the first and second filter elements connected thereto, fixing the positions of the first and second filter elements. In addition, a relatively large upper end cover through hole can be naturally formed between the first and second fixing parts and the support bar, facilitating the back-blowing device to blow more compressed air through the upper end cover through hole, increasing the dust cleaning efficiency;

[0029] 4. The first and second filter elements can adopt a setting of filter mesh - filter material - filter mesh. The filter material is fixed by the filter mesh to form a filter element, so that the filter material is not easily deformed or displaced during the dust removal and cleaning process, affecting the filtering effect;

[0030] 5. A handle is provided on the upper end surface of the upper end cover, facilitating the user to take out the square filter device from the dust removal equipment through the handle to maintain and replace the first and second filter elements;

[0031] 6. The square double-core filter further includes a connecting block. When the square double-core filter has two or more square filtering devices, the two or more square filtering devices are sequentially connected up and down through the connecting block to achieve partial replacement of multiple square filtering devices or individual replacement of a certain square filtering device, enabling users to more easily disassemble the square filtering device and replace the square filtering device or the first and second filter elements in the square filtering device, thereby saving maintenance and usage costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 Fig. 9 shows a schematic structural diagram of the square double-core filter of the first embodiment;

[0034] Fig. 2(a) shows a schematic structural diagram of the upper end cover in the first embodiment;

[0035] Fig. 2(b) shows a schematic structural diagram of the lower end cover in the first embodiment;

[0036] Fig. 3(a) shows a schematic diagram of the dust removal and filtration process of the square double-core filter in the first embodiment;

[0037] Fig. 3(b) shows a schematic diagram of the backwashing and dust cleaning process of the square double-core filter in the first embodiment;

[0038] Figure 4 Fig. 25 shows a schematic structural diagram of the upper end cover in the second embodiment;

[0039] Figure 5 Fig. 29 shows a schematic structural diagram of the filter element in the second embodiment;

[0040] Figure 6 Fig. 33 shows a schematic structural diagram of the upper end cover in the second embodiment;

[0041] Figure 7 Fig. 37 shows a schematic structural diagram of the square double-core filter of the third embodiment;

[0042] As shown in the figure: 1. Square filter device; 11. First filter element; 111. First side; 112. First filter material; 113. Second side; 12. Second filter element; 121. Third side; 122. Second filter material; 123. Fourth side; 13. First clean room; 14. Second clean room; 2. Upper end cover; 21. First fixing part; 211. First rectangular groove; 22. Second fixing part; 221. Second rectangular groove; 23. First connecting part; 231. Support bar; 24. Upper end cover through hole; 25. Handle; 3. Lower end cover; 31. Lower end cover fixing part; 32. Lower end cover through hole; 4. Connecting block; 41. Third fixing part; 411. Third rectangular groove; 412. Fifth rectangular groove; 42. Fourth fixing part; 421. Fourth rectangular groove; 422. Sixth rectangular groove; 43. Second connecting part. Detailed implementation mode

[0043] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0044] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0045] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present utility model, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0046] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention schematically. The diagrams only show the components related to the present invention, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, number, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0047] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the embodiments. However, those skilled in the art will understand that the embodiments can be practiced without these specific details.

[0048] Figure 1 Shown is a square double-core filter according to the first embodiment of the present invention. The above-mentioned square double-core filter includes: a square filtering device 1, an upper end cover 2, and a lower end cover 3.

[0049] Among them, the square filtering device 1 is composed of an inner and outer nested first filter element 11 and second filter element 12. The shape of the first filter element 11 is a hollow square cylinder, and the shape of the second filter element 12 is a hollow cylinder. Preferably, the shape of the second filter element 12 is also a hollow square cylinder. In other possible embodiments, the shape of the second filter element 12 can also be approximately a cylinder or other shapes, which are not limited herein. When the first filter element 11 is nested outside the second filter element 12, a receiving space (i.e., the first clean room) for air flow can be formed between the first filter element 11 and the second filter element 12. Since the second filter element is a hollow square cylinder, a receiving space (i.e., the second clean room) for air flow is naturally formed inside it. The upper end cover 2 and the lower end cover 3 are used to fix the square filtering device 1, that is, to fix the first filter element 11 and the second filter element 12 between the upper end cover 2 and the lower end cover 3. In addition, the upper end cover is provided with an upper end cover through hole 24 for circulating the clean air after dust removal and filtration, and the lower end cover 3 has a lower end cover through hole that allows the polluted air to enter and circulate. In addition, the above-mentioned upper end cover through hole 24 can also be used to circulate compressed air for reverse blowing and dust cleaning. In a possible implementation manner, the reverse blowing device of the dust collector is arranged above the upper end cover through hole 24, and the reverse blowing device can blow compressed air into the first clean room 13 through the upper end cover through hole 24 for reverse blowing and dust cleaning.

[0050] Specifically, FIG. 2(a) shows a schematic structural view of the upper end cap in the first embodiment. FIG. 2(a) is a top view of the upper end cap. In the figure, the upper end cap 2 includes a first fixing portion 21, a second fixing portion 22, a first connecting portion 23, and an upper end cap through hole 24. The lower end surface of the first fixing portion 21 is connected to the first filter element 11, and the lower end surface of the second fixing portion 22 is connected to the second filter element 12. The first fixing portion 21 and the second fixing portion 22 are respectively used to fix the first filter element 11 and the second filter element 12, making it difficult for them to displace, thereby making the structure of the square filter device 1 more stable. In practical applications, the first fixing portion 21, the second fixing portion, and the first filter element 11 and the second filter element 12 can adopt various connection and fixing methods, such as riveting, plugging, screw connection, and gluing, etc. The connection and fixing method depends on specific usage requirements and is not limited in this embodiment. The first connecting portion 23 in the upper end cap 2 is used to connect the first fixing portion 21 and the second fixing portion 22. The first connecting portion 23 can be a plurality of support bar structures shown in the figure. A plurality of support bars in the figure form the upper end cap through hole 24 between the first fixing portion 21 and the second fixing portion 22. In other embodiments, the first connecting portion 23 can also be a connecting plate structure, and other holes are opened on the plate surface to obtain the upper end cap through hole.

[0051] Correspondingly, FIG. 2(b) shows a schematic structural view of the lower end cap in the first embodiment. FIG. 2(b) is a bottom view of the lower end cap 3. In the figure, the lower end cap 3 is in a square shape and includes a lower end cap fixing portion 31 and a lower end cap through hole 32. The upper end surface of the lower end cap fixing portion 31 is connected to the first filter element 11 and the second filter element 12, and is used to fix the first filter element 11 and the second filter element 12. Cooperating with the first fixing portion 21 and the second fixing portion 32 of the upper end cap 2, the square filter device 1 is fixed between the upper end cap 2 and the lower end cap 3 to prevent the two filter elements from deforming. Similar to the upper end cap 2, the lower end cap fixing portion 31 and the first filter element 11 and the second filter element 12 can adopt various connection and fixing methods, such as riveting, plugging, screw connection, and gluing, etc. The lower end cap fixing portion 31 in the lower end cap 3 is a sealed plate-like structure shown in the figure, and gas cannot pass through the lower end cap fixing portion 31, playing a sealing role. However, a lower end cap through hole 32 is provided in the center of the lower end cap fixing portion 31, and polluted air or back-blow air flow, etc. can enter the interior of the second filter element 12 from the lower end cap through hole 32.

[0052] In a possible implementation manner, the first fixing portion 21 and the second fixing portion 22 of the upper end cap 2 are respectively used to fix the first filter element 11 and the second filter element 12, making it difficult for them to displace, while the lower end cap 3 only plays a supporting role for the first filter element 11 and the second filter element 12, that is, the third fixing portion 31 is connected to the fourth fixing portion 32 for supporting the first filter element 11 and the second filter element 12; in another possible implementation manner, it is also possible that the lower end cap 3 fixes the first filter element 11 and the second filter element 12, and the upper end cap 2 plays a supporting role for the first filter element 11 and the second filter element 12.

[0053] The working principle of the above embodiment is as follows: The use of the square double-core filter includes two working modes: dust removal filtration and reverse blowing and dust cleaning. The dust removal filtration mode is shown in Fig. 3(a). Fig. 3(a) shows a schematic diagram of the dust removal filtration process of the square double-core filter in the first embodiment. Polluted air can enter the first clean room 13 formed by the first filter element 11 and the second filter element 12 after being filtered by the first filter element 11 from the outside. The filtered clean air is discharged outside the filter through the upper end cover through hole 24. At the same time, the polluted air can also enter the internal accommodation space (i.e., the second clean room 14) of the second filter element 12 through the lower end cover through hole 32, and the clean air generated after being filtered by the second filter element 14 enters the first clean room 13 and is then discharged outside the filter through the upper end cover through hole 24.

[0054] Correspondingly, the reverse blowing and dust cleaning mode is shown in Fig. 3(b). Fig. 3(b) shows a schematic diagram of the reverse blowing and dust cleaning process of the square double-core filter in the first embodiment. The reverse blowing and dust cleaning operation aims to remove the dust accumulated on the first filter element 11 and the second filter element 12 and improve the dust removal filtration efficiency. The reverse blowing device of the dust collector is arranged above the upper end cover through hole 24. The reverse blowing device can blow compressed air into the first clean room 13 through the upper end cover through hole 24 for reverse blowing and dust cleaning. A part of the compressed air blown into the first clean room 13 is directly discharged outside the filter through the first filter element 11, and the other part of the compressed air flows through the second filter element 12 into the second clean room 14 and is finally discharged outside the filter through the lower end cover through hole 32.

[0055] The following introduces the second embodiment of a square double-core filter of the present invention. Different from the first embodiment, preferably, the upper end cover 2 in the second embodiment further includes: a first return groove 211, a second return groove 221, and a support bar 231; the first filter element 11 further includes: a first side 111, a first filter material 112, and a second side 113; the second filter element 12 further includes: a third side 121, a second filter material 122, and a fourth side 123.

[0056] Specifically, Figure 4 shows a schematic diagram of the structure of the upper end cover in the second embodiment. Figure 4It is a bottom view of the upper end cap 2, showing the structure of the lower end face of the upper end cap 2. The lower end faces of the first fixing part 21 and the second fixing part 22 are respectively provided with a first square groove 211 and a second square groove 221. The first square groove 211 is used for inserting the first filter element 11, and the second square groove 221 is used for inserting the second filter element 12, so that the first filter element 11 is nested outside the second filter element 12. In addition, the first connecting part 23 is composed of four support bars 231, connecting the first fixing part 21 and the second fixing part 22. Four upper end cap through holes 24 are formed between the four support bars 231 and the first fixing part 21 and the second fixing part 22. In other possible embodiments, according to actual usage requirements, the second connecting part 23 can also be composed of more or fewer support bars, and correspondingly form different numbers of upper end cap through holes.

[0057] Specifically, Figure 5 It shows a schematic structural diagram of the filter element in the second embodiment. The first filter element 11 is composed of a first side 111, a first filter material 112, and a second side 113. The second filter element 12 is composed of a third side 121, a second filter material 122, and a fourth side 123. In actual applications, the first filter material 112 and the second filter material 122 can be of the same material, for example, both are filter cotton. The first side 111, the second side 113, the third side 121, and the fourth side 123 play a role in maintaining the shapes of the first filter material 112 and the second filter material 122. In other embodiments, the first filter element 11 and the second filter element 12 may also be of an integral structure, without the first, second, third, and fourth sides that play a fixing role for the filter element. For example, a pleated HEPA filter element in the shape of a hollow square cylinder is made. And the filter element can also be selected from various materials, such as activated carbon filter elements, cellulose filter elements, nanofiber filter elements, and so on.

[0058] In a possible implementation manner, the upper end cap 2 can also be provided with a handle 25 that is convenient for the user to grasp, as Figure 6 shown, Figure 6 It shows a schematic structural diagram of another upper end cap in the second embodiment. Through the handle 25, the entire square filter device 1 together with the lower end cap 3 can be lifted, which is convenient for replacing and maintaining the square filter device or the filter element in the square filter device.

[0059] The following introduces the third embodiment of a square double-core filter of the present invention, as Figure 7 shown. In the case where the square double-core filter has two square filter devices, Figure 7 It shows a schematic structural diagram of the square double-core filter in the third embodiment. Different from the first embodiment, preferably, the square double-core filter further includes: a connecting block 4. In the case where the square double-core filter has two or more square filter devices 1, the connecting block 4 is used to sequentially connect the two or more square filter devices 1 up and down.

[0060] Specifically, the connecting block 4 includes a third fixing portion 41, a fourth fixing portion 42, and a second connecting portion 43. The upper end surfaces of the third fixing portion 41 and the fourth fixing portion 42 are respectively provided with a third square groove 411 and a fourth square groove 421, and the lower end surfaces of the third fixing portion 41 and the fourth fixing portion 42 are respectively provided with a fifth square groove 412 and a sixth square groove 422. The third square groove 411 and the fourth square groove 421 are respectively used for plugging and fixing the first filter element 11 and the second filter element 12 in the square filtering device 1 located above the connecting block 4; the fifth square groove 412 and the sixth square groove 422 are respectively used for plugging and fixing the first filter element 11 and the second filter element 12 in the square filtering device 1 located below the connecting block 4.

[0061] In the above embodiments, the square double-core filter further includes a connecting block. When the square double-core filter has two or more square filtering devices, the connecting block is used to sequentially connect the two or more square filtering devices up and down, so as to realize partial replacement of multiple square filtering devices, or individual replacement of a certain square filtering device, enabling users to more easily disassemble the square filtering device, replace the square filtering device or the first and second filter elements in the square filtering device, thereby saving the maintenance and use costs.

[0062] The dust collector according to an embodiment of the present invention includes: as Figures 1 to 7 shown in the square double-core filter, at least one backwashing device. The square double-core filter is installed on the dust collector and can achieve a good filtering and dust removal effect on gas soot and the like. The backwashing device is arranged above the through hole 24 of the upper end cover of the square double-core filter, and compressed air can be blown into the square double-core filter through the through hole 24 of the upper end cover for backwashing and dust cleaning. In practical applications, the backwashing device includes a backwashing nozzle, and the backwashing nozzle can be extended into the through hole 24 of the upper end cover to blow compressed air into the first clean chamber of the square double-core filter. In addition, multiple backwashing devices can be used for the backwashing and dust cleaning operation. For example: 4 backwashing devices are used for the 4 through holes 24 formed in the second embodiment, each backwashing device corresponds to one through hole 24 of the upper end cover, and the 4 backwashing nozzles respectively blow compressed air into the first clean chamber through the 4 through holes of the upper end cover. According to actual needs, the dust collector can adopt more or fewer backwashing devices, which is not limited herein.

[0063] In the above description of this specification, the same or similar parts among the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can refer to the partial description of the foregoing embodiments.

[0064] In the present utility model, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. At the same time, in this specification, descriptions of directions, such as up, down, left, right, front, back, inside, outside, longitudinal, transverse, vertical, horizontal, etc., indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus cannot be construed as a limitation to the present utility model.

[0065] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model shall be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A square double-core filter, characterized in that: include: At least one square filter device composed of a first filter element and a second filter element, an upper end cover, and a lower end cover; The first filter element is in the shape of a hollow square cylinder, the second filter element is in the shape of a hollow cylinder, the first filter element is nested outside the second filter element, a first clean chamber for airflow to pass through is formed between the first filter element and the second filter element, and a second clean chamber for airflow to pass through is formed inside the second filter element; The upper end cover comprises a first fixing portion, a second fixing portion, a first connecting portion and at least one upper end cover through hole, the lower end surface of the first fixing portion is connected to the first filter element, the lower end surface of the second fixing portion is connected to the second filter element, the first connecting portion is used to connect the first fixing portion and the second fixing portion, and the upper end cover through hole is opened between the first fixing portion and the second fixing portion; The lower end cover includes a lower end cover fixing portion and a lower end cover through hole, the upper end surface of the lower end cover fixing portion is connected to the first filter element and the second filter element, the lower end cover fixing portion is used to support the first filter element and the second filter element, and the lower end cover through hole is opened in the middle of the lower end cover fixing portion.

2. The square double-core filter according to claim 1, characterized in that: The lower end surfaces of the first fixing portion and the second fixing portion are respectively provided with a first circular groove and a second circular groove, the first circular groove being used for inserting the first filter element so that the first filter element is fixed between the upper end cover and the lower end cover, and the second circular groove being used for inserting the second filter element so that the second filter element is fixed between the upper end cover and the lower end cover.

3. The square double-core filter according to claim 1, characterized in that: The first connecting portion includes: at least one supporting bar, and the supporting bar connects the first fixing portion and the second fixing portion.

4. The square double-core filter according to claim 1, characterized in that: The first filter element comprises: a first filter material and a first side and a second side for fixing the first filter material, and the second filter element comprises a second filter material and a third side and a fourth side for fixing the second filter material; Wherein, the first side is arranged on the outer surface of the first filter element, the second side is arranged on the inner surface of the first filter element, and the first filter material is filled between the first side and the second side; The third side is arranged on the outer surface of the second filter element, the fourth side is arranged on the inner surface of the second filter element, and the second filter material is filled between the third side and the fourth side.

5. The square double-core filter according to claim 1, characterized in that: The upper end cover further includes a handle, and the handle is arranged on the upper end surface of the first fixing portion.

6. The square double-core filter according to claim 1, characterized in that: The square double-core filter further comprises: a connection block. When the square double-core filter is provided with two or more square filter devices, the connection block is used to connect the two or more square filter devices in sequence up and down.

7. The square double-core filter according to claim 6, characterized in that: The connecting block comprises: a third fixing portion, a fourth fixing portion, and a second connecting portion; The upper end surface of the third fixing part is connected to the first filter element in the square filter device located above the connecting block, and the upper end surface of the fourth fixing part is connected to the second filter element in the square filter device located above the connecting block; the lower end surface of the third fixing part is connected to the first filter element in the square filter device located below the connecting block, and the lower end surface of the fourth fixing part is connected to the second filter element in the square filter device located below the connecting block; the second connecting part is used to connect the third fixing part and the fourth fixing part.

8. The square double-core filter according to claim 7, characterized in that: The upper end surface of the third fixing part and the upper end surface of the fourth fixing part are respectively provided with a third and a fourth circumferential groove, and the lower end surface of the third fixing part and the lower end surface of the fourth fixing part are respectively provided with a fifth and a sixth circumferential groove; The third zigzag groove and the fourth zigzag groove are respectively used to plug and fix the first filter element and the second filter element in the square filter device located above the connecting block; the fifth zigzag groove and the sixth zigzag groove are respectively used to plug and fix the first filter element and the second filter element in the square filter device located below the connecting block.

9. A dust collector, characterized in that: include: at least one backflush device; A square double-core filter as claimed in any one of claims 1 to 8; The back-blowing device is arranged above the through hole of the upper end cover of the square double-core filter, and compressed air is blown into the interior of the square double-core filter through the through hole of the upper end cover.

10. The dust collector according to claim 9, characterized in that: The back-blowing device comprises: a back-blowing nozzle, and the back-blowing nozzle sprays the compressed air generated by the back-blowing device into the first clean chamber of the square double-core filter through the through hole of the upper end cover.

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