Air filtering device

Abstract

The air filtering device provided by the embodiment of the utility model comprises a first filtering unit, a second filtering unit and a third filtering unit, and the first filtering unit comprises a first barrel body and a second barrel body, and the first barrel body is provided with a first air inlet, a first air outlet and a first air channel communicated between the first air inlet and the first air outlet; the first filtering piece is arranged in the first air channel and divides the first air channel into a first part of air channel communicated with the first air inlet and a second part of air channel communicated with the first air outlet; the interlayer of the side wall of the first air outlet forms an annular back-blowing air channel communicated with the second part air channel; and the plurality of air supply units are respectively communicated with the back-blowing air channel. The plurality of air supply units are communicated with the back-blowing air channel, so that when the filtering effect of the first filtering piece is reduced, the plurality of air supply units can output back-blowing air with high pressure inside to the back-blowing air channel at the same time, the air quantity flowing to the second part air channel through the back-blowing air channel is increased, and the back-blowing effect of the back-blowing air channel on the first filtering piece is improved; the degree that dust is separated from the first filtering piece is improved, and the follow-up filtering effect of the air filtering device is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of air filtration, in particular to an air filtration device. BACKGROUND

[0002] The self-cleaning air filter releases gas into the air filter element through a backflush system, so that the dust on the surface of the air filter element is removed by the backflush gas, thereby achieving the function of automatically removing dust from the air filter element, reducing the cost of manual maintenance, and reducing the risk of damage to the filter element and secondary pollution caused by manual maintenance. It is widely used in engineering machinery.

[0003] However, the self-cleaning air filter in the prior art mostly releases backflush gas into the air filter element through one backflush system. However, only one backflush system cannot effectively remove dust due to the small amount of backflush gas. In addition, since the filter element is mostly annular, the backflush gas discharged by only one backflush system cannot uniformly backflush the filter element. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present disclosure is to provide an air filtration device to solve the problems in the related art.

[0005] The first aspect of the present disclosure provides an air filtration device, comprising:

[0006] A first filter unit, comprising: a first cylinder body having a first air inlet, a first air outlet, and a first air passage connecting between the first air inlet and the first air outlet; and a first filter element arranged in the first air passage, the first filter element divides the first air passage into a first partial air passage connected to the first air inlet and a second partial air passage connected to the first air outlet; and a first outflow side wall sandwiching a backflush air passage connected to the second partial air passage in an annular shape;

[0007] A plurality of air supply units respectively connected to the backflush air passage.

[0008] In an embodiment of the first aspect, the connection ports of the plurality of air supply units and the backflush air passage are uniformly distributed along the circumferential direction of the backflush air passage.

[0009] In an embodiment of the first aspect, the plurality of air supply units supply air to the backflush air passage synchronously.

[0010] In an embodiment of the first aspect, the backflush port of the backflush air passage connected to the second partial air passage is implemented in an annular shape.

[0011] In an embodiment of the first aspect, the backflush port has an inclined and annular shape to guide the air blown out of the backflush port towards the wind guide portion of the first filter element.

[0012] In an embodiment of the first aspect, the bottom wall of the first cylinder body forms a plurality of dust falling holes which are spaced apart along the circumference of the first cylinder body and are in communication with the first part of the air passage.

[0013] In an embodiment of the first aspect, the first air inlet is implemented as a plurality of first air inlets, and the plurality of first air inlets are arranged on the side wall of the first cylinder body and spaced apart along the circumference of the first cylinder body.

[0014] In an embodiment of the first aspect, the first filter unit further comprises a gas collecting cover arranged on the side wall of the first cylinder body and covering the plurality of first air inlets, and forming a gas collecting space with the gas outlet downward.

[0015] In an embodiment of the first aspect, the first cylinder body comprises a gas collecting pipe and a cover plate which are detachably connected, and the first air outlet is formed at one end of the gas collecting pipe, and the cover plate is arranged at the other end of the gas collecting pipe.

[0016] In an embodiment of the first aspect, a control unit is further included, and the control unit comprises a controller, a plurality of valves and a sensor, the plurality of valves and the sensor are communicatively connected to the controller, the plurality of valves are arranged at the air supply outlets of the plurality of air supply units, the sensor is arranged in the second part of the air passage, and the controller controls the plurality of valves to be turned on when the sensor detects that the gas pressure in the second part of the air passage is lower than a predetermined value.

[0017] As described above, the air filter device provided in the embodiments of the present disclosure comprises a first filter unit and a plurality of air supply units. The first filter unit comprises a first cylinder body having a first air inlet, a first air outlet and a first air passage in communication between the first air inlet and the first air outlet, and a first filter element arranged in the first air passage, the first filter element divides the first air passage into a first part of the air passage in communication with the first air inlet and a second part of the air passage in communication with the first air outlet, and a side wall of the first air outlet forms an annular back-blowing air passage in communication with the second part of the air passage. The plurality of air supply units are respectively in communication with the back-blowing air passage. In the embodiments of the present disclosure, the plurality of air supply units are in communication with the back-blowing air passage, so that when the filtering effect of the first filter element is reduced, the plurality of air supply units can simultaneously output the high-pressure back-blowing gas inside to the back-blowing air passage, thereby increasing the amount of gas flowing to the second part of the air passage through the back-blowing air passage, improving the back-blowing effect of the back-blowing air passage on the first filter element, and further improving the degree of dust separation from the first filter element and the subsequent filtering effect of the air filter device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1Fig. 1 shows a schematic diagram of the overall structure of an air filter device according to an embodiment of the present disclosure;

[0019] Figure 2 Fig. 2 shows a cross-sectional view of the overall structure of an air filter device according to an embodiment of the present disclosure;

[0020] Figure 3 Fig. 3 shows a cross-sectional view of the overall structure of an air filter device according to an embodiment of the present disclosure from another perspective;

[0021] Figure 4 Fig. 4 shows a schematic diagram of another embodiment of the air filter device according to the present disclosure; Figure 2 Fig. 5 shows an enlarged view of A in Fig. 4;

[0022] Figure 5 Fig. 6 shows a schematic diagram of another embodiment of the air filter device according to the present disclosure; Figure 4 DETAILED DESCRIPTION

[0023] The advantages and effects of the present disclosure can be easily understood by those skilled in the art from the messages disclosed in the present disclosure. The present disclosure can also be implemented or applied in different specific embodiments or modules, and the details in the present disclosure can be modified or changed in different perspectives or modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0024] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The present disclosure can be embodied in various ways, and is not limited to the embodiments described herein.

[0025] In the description of the present disclosure, the expressions "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or a group of embodiments or examples in a suitable manner. In addition, the different embodiments or examples represented in the present disclosure and the features of the different embodiments or examples can be combined and combined by those skilled in the art without conflict.

[0026] ​Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the context of this disclosure, "a group" means two or more, unless otherwise specifically defined.

[0027] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same or similar components throughout the specification are denoted by the same reference numerals.

[0028] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0029] Although the terms first, second, etc. are used in this document to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are represented. Furthermore, as used in this document, the singular forms "one," "an," and "the" are intended to also include the plural forms, unless there is a contrary indication in the context. It should be further understood that the terms "comprise" and "include" indicate the presence of the described features, steps, operations, elements, modules, projects, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or a group of other features, steps, operations, elements, modules, projects, types, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0030] The technical terms used herein are intended only to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the statement explicitly indicates otherwise. The term "comprising" as used in this specification is intended to specify specific features, regions, integers, steps, operations, elements, and / or components and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and / or components.

[0031] Although not defined differently, technical terms and scientific terms used herein include those used in the technical field to which the present disclosure belongs, and all terms have the same meaning as generally understood by those skilled in the art to which the present disclosure belongs. The terms defined in the commonly used dictionary are additionally explained to have the meaning consistent with the relevant technical literature and the currently prompted message, and if not defined, should not be over-interpreted as ideal or very formal meanings.

[0032] The self-cleaning air filter releases gas into the inside of the air filter element instantaneously through the backflush system, so that the dust on the surface of the air filter element falls off and is discharged under the instantaneous airflow backflush, thereby achieving the function of automatically removing dust from the air filter element, reducing the cost of manual maintenance, and reducing the risk of damage to the filter element and the risk of secondary pollution caused by manual maintenance. It is widely used in engineering machinery.

[0033] However, the self-cleaning air filter in the prior art mostly releases backflush gas into the inside of the air filter element through one backflush system, but setting only one backflush system not only cannot effectively backflush and remove dust due to small backflush gas volume. Secondly, since the filter element is mostly annular, the backflush gas discharged by only one backflush system cannot uniformly backflush and remove dust from the filter element.

[0034] Based on the above problems, the plurality of gas supply units in the embodiment of the present disclosure are in communication with the backflush air duct, so that when the filtering effect of the first filter element is reduced, the plurality of gas supply units can simultaneously output high-pressure backflush gas inside to the backflush air duct, thereby increasing the amount of gas flowing to the second part of the air duct through the backflush air duct, improving the backflush effect of the backflush air duct on the first filter element, and further improving the degree of dust separation from the first filter element, improving the subsequent filtering effect of the air filter device.

[0035] Figure 1 The overall structure of the air filter device of the embodiment of the present disclosure is shown in FIG. 1. Figure 2 The cross-sectional view of the overall structure of the air filter device of the embodiment of the present disclosure is shown in FIG. 2. Figure 3 The cross-sectional view of the overall structure of the air filter device of the embodiment of the present disclosure is shown in FIG. 3. Figure 4 The air filter device of the embodiment of the present disclosure is shown in FIG. 4. Figure 2 The enlarged view of A in FIG. 4 is shown in FIG. 5. Figure 1 , 2 , 3 and Figure 4In an example, the air filtering device includes a first filtering unit 10 and a plurality of air supply units 20. The first filtering unit 10 includes a first cylinder 11 having a first air inlet 1101, a first air outlet 1102, and a first air passage connecting the first air inlet 1101 and the first air outlet 1102; and a first filter 12 arranged in the first air passage, the first filter 12 divides the first air passage into a first partial air passage 1103 connected to the first air inlet 1101 and a second partial air passage 1104 connected to the first air outlet 1102; and a reverse blowing air passage 101 in the form of an annulus is formed in the side wall of the first air outlet 1102 and connected to the second partial air passage 1104. The plurality of air supply units 20 are respectively connected to the reverse blowing air passage 101.

[0036] The advantage of the above arrangement is that the plurality of air supply units 20 in the embodiment of the present disclosure are connected to the reverse blowing air passage 101, so that when the filtering effect of the first filter 12 is reduced, the plurality of air supply units 20 can simultaneously output the high-pressure reverse blowing gas to the reverse blowing air passage 101, thereby increasing the amount of gas flowing to the second partial air passage 1104 through the reverse blowing air passage 101, improving the reverse blowing effect of the reverse blowing air passage 101 on the first filter 12, and further improving the degree of dust separation from the first filter 12, thereby improving the subsequent filtering effect of the air filtering device.

[0037] In an example, the connection ports of the plurality of air supply units 20 and the reverse blowing air passage 101 are distributed along the circumference of the reverse blowing air passage 101. In this embodiment, the air supply units 20 are implemented as a pair, and the pair of air supply units 20 are symmetrically arranged on both sides of the first cylinder 11 and connected to the reverse blowing air passage 101. It can be understood that the two air supply units 20 arranged symmetrically not only increase the amount of gas entering the reverse blowing air passage 101, but also improve the uniform distribution of the gas entering the reverse blowing air passage 101 in the reverse blowing air passage 101, so that the reverse blowing gas in the second partial air passage 1104 can be uniformly distributed to the wall surface of the first filter 12, thereby further improving the reverse blowing dust removal effect on the first filter 12.

[0038] In another embodiment, the air supply units are implemented as three or four. When the air supply units are implemented as four, the four air supply units are distributed in a cross shape.

[0039] In a further example, the plurality of air supply units 20 supply air to the reverse blowing air passage 101 synchronously. It can be understood that the synchronous air supply of the plurality of air supply units 20 can increase the amount of gas used for reverse blowing dust removal of the first filter 12, thereby improving the dust removal effect.

[0040] Exemplarily, the blowback port 1011, through which the blowback air passage 101 communicates with the second part air passage 1104, is implemented as an annular shape. Further exemplarily, the blowback air passage 101 is coaxial with the first cylinder 11. The above arrangement has the benefit that the blowback gas in the blowback air passage 101 can be uniformly sprayed into the second part air passage 1104 in 360 degrees through the annular blowback port 1011, so as to uniformly blow and clean the first filter 12. The distance between the blowback port 1011 and the inner wall of the first filter 12 is close, so that the gas blown out of the blowback port 1011 can simultaneously contact the first filter 12, so that the blowback and cleaning effect of the first filter 12 at different positions is more uniform.

[0041] In Figure 4 Exemplarily, the blowback port 1011 has an inclined arrangement and is annular to guide the gas blown out of the blowback port 1011 towards the air guide part 10111 of the first filter 12. In this embodiment, the air guide part 10111 can guide the gas blown out of the blowback port 1011 to blow towards the first filter 12, thereby improving the blowback and cleaning effect of the first filter 12 by the impact force of the blowback gas. The situation that the gas blown out of the blowback port 1011 directly blows in the vertical direction and wastes the impact force of the blowback gas is avoided.

[0042] In Figure 4 Exemplarily, the first air inlet is implemented as a first air inlet pipe. The first air inlet pipe comprises a gas collecting pipe 1021 and a guide pipe 1022; the gas collecting pipe 1021 is arranged in the first cylinder 11 and communicates with the first air passage, and the guide pipe 1022 is gap-fittingly sleeved on the gas collecting pipe 1021 and is in airtight connection with the inner wall of the gas collecting pipe 1021 at the bottom end, and the blowback air passage 101 is the area between the inner wall of the gas collecting pipe 1021 and the outer wall of the guide pipe 1022. Further exemplarily, the part of the guide pipe 1022 that is higher than the gas collecting pipe 1021 forms an annular air guide part 10111 with a diameter increasing upwards.

[0043] Figure 5 Fig. 2 shows a schematic view of another embodiment of the present disclosure. Figure 4 In Figure 5 Exemplarily, the part of the gas collecting pipe 1021A on which the blowback port 1011A is formed is annular and forms a reinforcing part 10112 with a diameter decreasing upwards. It can be understood that the reinforcing part 10112 reduces the caliber of the blowback port 1011A, thereby increasing the flow rate of the blowback gas flowing through the blowback port 1011A, and further improving the blowback and cleaning effect of the first filter 12A by the blowback gas with the increased flow rate.

[0044] Exemplarily, the air filtering device further comprises a control unit (not shown in the figure). The control unit comprises a controller, a plurality of valves and a sensor; the plurality of valves and the sensor are communicatively connected to the controller; the plurality of valves are correspondingly arranged at the air supply ports (not shown in the figure) of the plurality of air supply units 20, and the sensor is arranged in the second part of the air passage 1104; when the sensor detects that the air pressure in the second part of the air passage 1104 is lower than a predetermined value, the controller causes the plurality of valves to be simultaneously turned on or alternately turned on.

[0045] Exemplarily, the air supply unit 20 is implemented as an air tank. The air supply unit 20 implemented as an air tank further comprises an air supply port. The air source of the air supply unit 20 is an external air compressor. In another embodiment, the air supply unit 20 is directly implemented as an air compressor.

[0046] In Figure 2 and Figure 3 In an example, the bottom wall of the first cylinder 11 forms a plurality of dust falling holes 105 which are spaced apart along the circumference of the first cylinder 11 and are in communication with the first part of the air passage 1103. In this way, the dust or impurities which are back-flushed and fall off the outer wall of the first filter 12 can freely fall under the interception of the first cylinder 11 and pass through the dust falling holes 105 to be discharged out of the first cylinder 11. In another embodiment, a collection frame for collecting the dust or impurities which fall off is arranged below the first cylinder, so as to avoid the dust or impurities which fall off from polluting the environment.

[0047] In Figure 1 and Figure 2 In an example, the air supply unit 20 implemented as an air tank is covered with a protective cover 21. The protective cover 21 can avoid the air supply unit from being damaged by the external environment.

[0048] In Figure 2 In an example, the first air inlet 1101 is implemented as a plurality of first air inlets 1101 which are spaced apart along the circumference of the first cylinder 11 and are arranged at the side wall of the first cylinder 11. Those skilled in the art can understand that, in the air filtering stage, the external air can not only enter the first part of the air passage 1103 from the first air inlets 1101, but also enter the first part of the air passage 1103 through the dust falling holes 105.

[0049] In Figure 2 and Figure 3In an example, the first filtering unit 10 further comprises a gas collecting cover 13, which is arranged on the side wall of the first cylinder 11 and covers the first air inlets 1101, and forms a gas collecting opening 1301 downwardly facing gas collecting space. It can be understood that, first, the gas collecting cover 13 and the gas collecting opening 1301 facing downwardly can avoid the first air inlets 1101 from accumulating dust and sundries, and keep the first air inlets 1101 clean. Second, according to the principle of gravity, even in heavy rain, only air can enter due to the downwardly facing gas collecting opening 1301, and water cannot enter the air filtering device due to free fall under gravity.

[0050] In Figure 2 In an example, the first cylinder 11 comprises a detachably connected gas collecting pipe 111 and a cover plate 112. The first air outlet 1102 is formed at one end of the gas collecting pipe 111, and the cover plate 112 is arranged at the other end of the gas collecting pipe 111. In an example, the detachable connection is implemented by screwing the cover plate 112 to the gas collecting pipe 111. Through the above arrangement, the operator can conveniently replace or maintain the first filtering element 12, and the use effect is improved. In a further example, a sealing gasket (not shown in the figure) is arranged between the cover plate 112 and the gas collecting pipe 111 to improve the sealing performance of the first cylinder 11.

[0051] In an example, one end of the first filtering element 12 abuts against the cover plate 112, and the other end abuts against the bottom wall of the gas collecting pipe 111. In a further example, a sealing ring (not shown in the figure) is detachably arranged at the position where the cover plate 112 abuts against the gas collecting pipe 111, to further improve the sealing performance between the first cylinder 11 and the first filtering element 12.

[0052] In Figure 1 And Figure 2 In an example, the air filtering device further comprises a horizontally arranged second filtering unit 30, and the second air inlet 301 of the second filtering unit 30 is in communication with the first air outlet 1102. In an example, the structure of the second filtering unit 30 can be the same as that of the first filtering unit 10.

[0053] In summary, the air filtering device provided in the embodiments of the present disclosure includes a first filtering unit and a plurality of air supply units. The first filtering unit includes a first cylinder body having a first air inlet, a first air outlet, and a first air channel connecting the first air inlet and the first air outlet; and a first filter arranged in the first air channel, the first filter divides the first air channel into a first partial air channel connected to the first air inlet and a second partial air channel connected to the first air outlet; a side wall of the first air outlet forms an annular back-blowing air channel connected to the second partial air channel. The plurality of air supply units are respectively connected to the back-blowing air channel. The advantage of the above arrangement is that the plurality of air supply units in the embodiments of the present disclosure are connected to the back-blowing air channel, so that when the filtering effect of the first filter is reduced, the plurality of air supply units can simultaneously output the high-pressure back-blowing gas to the back-blowing air channel, thereby increasing the amount of gas flowing to the second partial air channel through the back-blowing air channel, improving the back-blowing effect of the back-blowing air channel on the first filter, and further improving the degree of dust separation from the first filter, thereby improving the subsequent filtering effect of the air filtering device.

[0054] The above embodiments are only illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present disclosure should still be covered by the protection scope of the present disclosure.

Claims

1. An air filter device, characterized in that: include: The first filter unit comprises: a first cylindrical body having a first air inlet, a first air outlet, and a first air passage communicating between the first air inlet and the first air outlet; and a first filter element provided in the first air passage, the first filter element dividing the first air passage into a first air passage portion communicating with the first air inlet and a second air passage portion communicating with the first air outlet; a side wall interlayer of the first air outlet forming an annular backflush air passage communicating with the second air passage portion; A plurality of air supply units are respectively connected to the back-blowing air passages.

2. The air filter device according to claim 1, characterized in that The connection ports of the plurality of air supply units and the back-blowing air passage are evenly spaced along the circumference of the back-blowing air passage.

3. The air filter device according to claim 1, characterized in that The plurality of air supply units synchronously supply air to the back-blowing air passage.

4. The air filter device according to claim 1, characterized in that The backflush port communicating with the second part of the air passage is annular.

5. The air filter device according to claim 4, characterized in that: The reverse blowing port is tilted and annular so that the gas blown out of the reverse blowing port is directed toward the air guide portion of the first filter element.

6. The air filter device according to claim 1, characterized in that The bottom wall of the first cylinder is formed with a plurality of dust collection holes which are distributed at intervals along the circumference thereof and are connected to the first portion of the air passage.

7. The air filter device according to claim 1, characterized in that The first air inlet is implemented in a plurality; the plurality of first air inlets are arranged on the side wall of the first cylinder at intervals and distributed along the circumference of the first cylinder.

8. The air filter device according to claim 7, characterized in that: The first filter unit further includes an air collecting hood, which is arranged on the side wall of the first cylinder and covers the first air inlets, forming an air collecting space with the air collecting ports facing downward.

9. The air filter device according to claim 1, characterized in that: The first cylinder includes a detachably connected gas collecting pipe and a cover plate; the first gas outlet is formed at one end of the gas collecting pipe, and the cover plate is provided at the other end of the gas collecting pipe.

10. The air filter device according to claim 1, characterized in that It also includes a control unit; the control unit includes a controller, multiple valve bodies and sensors; the multiple valve bodies and sensors are communicatively connected to the controller; the multiple valve bodies are correspondingly arranged at the air supply ports of the multiple air supply units, and the sensors are arranged in the second part of the air duct; the controller makes the multiple valve bodies conductive when the sensor detects that the gas pressure in the second part of the air duct is lower than a predetermined value.

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