CN212508592U

CN212508592U - Air filtering device

Info

Publication number: CN212508592U
Application number: CN202022124814.XU
Authority: CN
Inventors: 杨强
Original assignee: CRRC Tianjin Track Traffic Equipment Co Ltd
Current assignee: Tianjin Zhongxin Rail Transit Equipment Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-02-09
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to the technical field of air filtration, and discloses an air filtration device, which comprises a filtration channel and a plurality of flow guide channels; this air filter device sets up and filters the passageway, it sets up the water conservancy diversion passageway to filter the passageway side, the air flows in and filters the passageway after there is some entering water conservancy diversion passageway, the water conservancy diversion passageway exports this part air, be clean air promptly, and impurity in the air can be in filtering the passageway and get back to the atmosphere along with the air current row, thereby the separation of clean air and impurity has been realized, provide clean air stably, the impurity of having both avoided gathering blocks up air filter device, the trouble of artifical clearance air filter device has been saved again, manpower, material resources and financial resources have been practiced thrift, and can guarantee to normally work for a long time under the condition of not clearing up, thereby support the operation of internal-combustion engine.

Description

Air filtering device

Technical Field

The utility model relates to an air filtering technical field, concretely relates to air filtering device.

Background

In various fields such as daily life, industrial production, transportation, military equipment and the like, air is often required to be filtered, so that clean air for removing various impurities such as sand, dust, debris and the like is obtained. In daily life, the clean air can improve the environment of people and improve the quality of life. In industrial production, the clean air can be used by industrial equipment, so that the working efficiency of the equipment is improved, and the damage of the equipment is reduced.

In transportation vehicles and military equipment, an internal combustion engine is indispensable equipment, the fuel of the internal combustion engine is fully combusted, the external supply of sufficient air to the internal combustion engine is required, oxygen in the air is used for supporting the fuel combustion, when the air entering the internal combustion engine contains impurities such as sand, dust, debris and the like, the impurities can cause abrasion to the internal combustion engine, the service life of the internal combustion engine is shortened, in order to prevent the impurities from entering the internal combustion engine, an air filter is required to be arranged in an air supply channel of the internal combustion engine, and therefore, the air filter is also a matching device required by the normal operation of the internal combustion engine.

The existing air filter for supplying air to the internal combustion engine mostly adopts centrifugal force to separate impurities from air, and then filters the impurities through a filter element, thereby obtaining clean air. For example, cyclone filters operate on the principle of a device that uses centrifugal force to separate solid particles or liquid droplets from a gas stream. When the gas flow containing liquid or impurities enters the filter, the gas flow can generate strong vortex motion due to the design of the rotary vortex in the cyclone cylinder, so that strong centrifugal force is formed, and solid particles and liquid impurities are attached to the cyclone cylinder. The impurities are separated from the gas stream and accumulate in the dust zone of the vessel. The purified gas leaves the cyclone filter and enters a next-stage fine filtering device, and one or more filter elements are arranged in the fine filtering device and can filter out small solid particles.

The problems with the above air cleaner are:

1. when the airflow rotates at high speed, wall pressure is generated on the inner wall of the cyclone filter, and the wall pressure blocks small-particle dust or impurities (particularly floating objects such as plant fragments, catkin, poplar catkin and the like) with smaller specific gravity from approaching, so that the impurities cannot be settled and removed.

2. The cyclone filter is not thorough in separation of air and impurities, the impurities wrapped in the output air are easily hung on the filter element, and in the past, the filter element is easily blocked, the filtering effect is poor, and clean air cannot be stably conveyed.

3. Traditional filtering modes such as a metal filter screen filter, a fiber filter, a paper filter and the like all belong to passive adsorption type filtering; the passive filtration approach yields only two results: one is that dust passes through the filter, which does not play a due role; secondly, dust is adsorbed on the filter, the airflow channel on the filter is gradually blocked, and the air inflow is gradually reduced. In order to ensure that the filter in a passive filtration mode works normally, the filter element must be cleaned or replaced frequently, time and energy are consumed, the material cost for using a large number of filter elements is high, and the operation of an internal combustion engine is inevitably influenced even serious accidents are caused if the filter element is not cleaned or replaced in sufficient time in emergency.

4. When meeting moist external environment such as rainwater, dew, during moisture gets into smart filter equipment, the dust layer on filter core surface meets water and can become mud, and is more serious to airflow channel's jam.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an air filter, this air filter can be with big particulate matter, little particulate matter and floater and air separation, provide clean air steadily, can directly discharge impurity when carrying clean air, the impurity of having both avoided gathering blocks up air filter, the trouble of artifical clearance air filter has been saved again, the manpower is practiced thrift, material resources and financial resources, and can guarantee the long-time normal work under the condition of not clearing up, thereby support the operation of internal-combustion engine.

In order to achieve the above object, the present invention provides the following technical solutions:

an air cleaner assembly, comprising: the two ends of the filtering channel are both of non-closed structures, wherein one end of the filtering channel is used for air to enter, and the other end of the filtering channel is used for discharging impurities; the flow guide channels are fixed on the side surfaces of the filtering channels and are communicated with the filtering channels, the sum of the sectional areas of the flow guide channels is larger than the sectional area of the filtering channel, an included angle alpha is formed between the flow guide channels and the filtering channels, and the included angle alpha is smaller than 90 degrees.

The utility model discloses in, preferred, the side symmetric connection who filters the passageway has the water conservancy diversion passageway.

The utility model discloses in, preferred, the fan is installed to the at least one end of filtering the passageway.

The utility model discloses in, preferred, still include the casing, the water conservancy diversion passageway filter the passageway with the part that the water conservancy diversion passageway is connected all install in the casing, the both ends of filtering the passageway are stretched out outside the casing, be provided with the clean air export on the casing, the quantity of filtering the passageway is one or more.

In the present invention, preferably, the included angle α is 10 ° to 60 °.

The utility model discloses in, preferred, the water conservancy diversion passageway including set up in filter the gas pocket of passageway side and with gas pocket edge fixed connection's water conservancy diversion piece.

The utility model discloses in, it is preferred, the water conservancy diversion piece is straight line shape, arc or dogleg shape.

The utility model discloses in, it is preferred, filter the passageway and tighten up the section including the extension section, the both ends of extension section are connected with respectively tighten up the section, the cross-sectional area of extension section is greater than tighten up the cross-sectional area of section, the water conservancy diversion passageway is fixed in the side of extension section, the extension section with tighten up the inner wall of the part that the section is connected with the inner wall of tightening up the section has contained angle beta, contained angle beta is greater than 0 and is less than 90.

In the present invention, preferably, the included angle β is 1 ° to 30 °.

The utility model discloses in, preferred, filter at least one end in the both ends of passageway and be the structure of buckling.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an air filter sets up the water conservancy diversion passageway in filtering the passageway side, the air has partly to get into the water conservancy diversion passageway after flowing into filtering the passageway, the water conservancy diversion passageway exports this part air, be clean air, and impurity in the air can be discharged back to the atmosphere along with the air current in filtering the passageway, thereby the separation of clean air and impurity has been realized, provide clean air steadily, both avoided the impurity of gathering to block up air filter, the trouble of manual cleaning air filter has been saved again, manpower, material resources and financial resources have been saved, and can guarantee to normally work for a long time under the condition of not clearing up, thereby support the operation of internal-combustion engine; the shell covered outside the diversion channel can collect and convey clean air to a designated area; the air filter device can be powered by the fan arranged at the atmosphere inlet and/or the impurity outlet, so that the dependence on external power is not required.

Drawings

Fig. 1 is a schematic structural view of an air cleaner assembly.

Fig. 2 is an enlarged view of a portion a in fig. 1.

FIG. 3 is a schematic diagram of an air cleaner assembly having multiple sets of cleaner passages.

FIG. 4 is a schematic view of an end face of an air cleaner assembly having a square housing and multiple sets of cleaner passages.

FIG. 5 is a schematic view of an end face of an air cleaner assembly having a circular housing and multiple sets of cleaner passages.

Fig. 6 is a schematic structural view of an air cleaner device with circular arc-shaped guide vanes.

Fig. 7 is a schematic structural view of an air cleaner device with a polygonal guide vane.

Fig. 8 is a schematic view of an air cleaner assembly having an expansion section and a contraction section.

Fig. 9 is an enlarged view of a portion B in fig. 8.

FIG. 10 is a schematic view of an air cleaner assembly with a filter passage having a folded configuration at each end.

In the drawings: 1-a filtering channel, 101-an atmosphere inlet, 102-an impurity outlet, 103-an expanding section, 104-a tightening section, 2-a flow guide channel, 201-an air hole, 202-a flow guide sheet, 203-an arc flow guide sheet, 204-a broken line flow guide sheet, 3-a fan, 4-a shell and 401-a clean air outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 10, a preferred embodiment of the present invention provides an air filter device, which includes a filter passage 1 and a plurality of flow guide passages 2.

In the present embodiment, the filter passage 1 has a tubular structure, and the cross section thereof may be circular or square, or may have other unusual shapes, and a section of inner cavity may be formed as the filter passage 1. Both ends of the filtering channel 1 are not closed but opened, so that the air flow can enter the filtering channel 1 from one end and can be discharged out of the filtering channel 1 from the other end. The guide channel 2 is a section of structure capable of guiding airflow to flow in a certain direction, can be of a tubular structure and can also be a simpler wind-shield sheet, the guide channel 2 is fixedly connected with the side surface of the filtering channel 1, and the guide channel 2 is communicated with the filtering channel 1.

The angle between the flow-guiding channel 2 and the filter channel 1 is α, which is smaller than 90 °, and the angle between the flow-guiding channel 2 and the filter channel 1 is understood to be the angle between the overall shape of the flow-guiding channel 2 and the filter channel 1. For example, the flow guide channel 2 is linear, and an included angle between a straight line where the flow guide channel 2 is located and a straight line where the filtering channel 1 is located is an included angle α; if the guide channel 2 is arc-shaped, an included angle between a tangent line of the middle point of the arc of the section where the guide channel 2 is located and a straight line where the filtering channel 1 is located is an included angle alpha; for another example, if the flow guide channel 2 is irregular, the angle trend of the included angle between the overall shape of the flow guide channel 2 and the filtering channel 1 needs to be considered, for example, the included angle between the tangent line of each point of the irregular flow guide channel 2 and the filtering channel 1 is a positive angle and a negative angle, and the angles are summed up to obtain a total angle, which is the included angle α.

The two ends of the filtering channel 1 are used for air entering and impurity discharging respectively, how to distribute depends on the direction of the included angle alpha, one end of the included angle alpha pointed by the vertex is an impurity outlet 102 for impurity discharging, and the other end is an atmosphere inlet 101 for outside air entering. The end of the flow guide channel 2 connected with the filtering channel 1 is defined as a flow guide channel inlet, the end not connected with the filtering channel 1 is defined as a flow guide channel outlet, and in the filtering channel 1, clean air enters the flow guide channel 2 from the flow guide channel inlet and is led out from the flow guide channel outlet.

Specifically, the working principle of the air filter device is as follows: when air flow with a certain speed exists in the outside air, the atmosphere inlet 101 faces the air flow direction, so that the outside air enters the filtering channel 1 from the atmosphere inlet 101, and impurities exist in the air entering the filtering channel 1. In the filtering channel 1, the air containing impurities flows towards the impurity outlet 102, and when passing through the position of the guide channel 2, part of the air enters the guide channel 2 and flows out from the guide channel outlet, and the part of the air is clean air.

The sum of the sectional areas of the guide channels 2 is larger than that of the filter channel 1, and the friction of the airflow in the filter channel 1 and the guide channels 2 loses energy, so that the airflow speed in the guide channels 2 is slower than that in the filter channel 1. The movement tendency of the impurities such as sand, floccule, dust, water drops and the like wrapped in the airflow in the filtering channel 1 under the action of the airflows in two directions is to move from the atmosphere inlet 101 to the impurity outlet 102, and simultaneously, the impurities are close to the inlet of the filtering channel from the center of the filtering channel 1, but because the attraction force at the position of the flow guide channel 2 is small, the movement inertia of the impurities cannot be overcome, namely the air flow speed in the filtering channel 1 is higher than that in the flow guide channel 2, the impurities can flow through the area, in which the flow guide channel 2 is arranged, in the filtering channel 1 before entering the flow guide channel 2, so the impurities cannot enter the flow guide channel 2, and the clean air and the impurities can be automatically separated. Wherein, the ratio or difference of the air flow velocity in the guide channel 2 and the air flow velocity in the filtering channel 1 can be adjusted by adjusting the difference of the cross sections of the two channels and adding power sources such as fans and the like in the pipeline.

Meanwhile, the air flow in the filtering channel 1 has strong dynamic pressure, and when high-pressure air impacts the inner wall of the guide channel 2, a high-pressure area is generated on the inner wall of the guide channel 2. According to Bernoulli's principle, the air flow center of the filtering channel 1 has high flow speed but low static pressure; and the air flow of the guide channel 2 around the filtering channel 1 and the area nearby the guide channel has certain kinetic energy loss, the flow speed is slow, but the static pressure is large. In this case, the impurities such as particles, floccules, water drops and the like entrained by the air flow in the filtering channel 1 generate pressure difference under the action of unequal static pressure, and then displacement occurs, and the impurities move to the central position of the air flow with small static pressure and do not enter the flow guide channel 2, so that the impurities are smoothly discharged back to the atmosphere from the impurity outlet 102 along with the air flow in the filtering channel.

On the other hand, the air in the guide channel 2 flows obliquely backward relative to the air in the filtering channel 1, that is, the air in the guide channel 2 flows obliquely backward at an included angle α with the air flow direction in the filtering channel 1, the air flow entering the inlet of the guide channel flows obliquely backward, a static pressure greater than the pressure of the central part of the air flow in the filtering channel 1 is formed at the inlet of the guide channel, and the static pressure can push the light impurities (such as floccules) close to the inlet of the guide channel back to the central position of the filtering channel 1, so that the light impurities cannot enter the guide channel 2, and the light impurities can continue to move toward the impurity outlet 102 along with the air flow. And the heavier impurities (such as sand) hit the inner wall of the guide channel 2 if reaching the inlet of the guide channel, are ejected back to the central position of the filter channel 1, and keep moving towards the impurity outlet 102 due to the inertia of the impurities, but do not move towards the guide channel 2 at the oblique rear.

Through the three processes, the clean air without impurities can be guided out from the flow guide channel 2, and impurities such as particulate matters and floating matters are discharged from the impurity outlet 102 along with the air flow in the filtering channel 1, so that the clean air is obtained by using the air filtering device.

The size of the air cleaner assembly may be determined according to the space in which clean air is required. For example, if clean air is supplied to a room, the atmospheric air inlet 101 and the impurity outlet 102 of the filter passage 1 of the air cleaner need to be extended out of the room, and the portion to which the guide passage 2 is connected is located in the room, and of course, the air cleaner needs to generate a large air flow velocity naturally or artificially to support its operation. If clean air is provided for the inside of an electrical cabinet, the atmosphere inlet 101 and the impurity outlet 102 of the filtering channel 1 only need to extend out of the electrical cabinet, the part connected with the flow guide channel 2 is arranged in the electrical cabinet, and the required air flow can be natural air or artificially produced air.

This device utilizes the air current to directly discharge from filtering passageway 1 with the impurity in the air, utilize water conservancy diversion passageway 2 to derive in the space of needs clean air with clean air, realized with large granule thing, little particulate matter and floater and air separation, can provide clean air steadily, can directly discharge impurity when carrying clean air, the impurity of having both avoided gathering is blockked up air filter, the trouble of artifical clearance air filter has been saved again, manpower, material resources and financial resources have been practiced thrift.

In a preferred embodiment of the present invention, the side surface of the filtering channel 1 is symmetrically connected with the flow guiding channel 2. For example, one side of the filtering channel 1 is connected with a plurality of guide channels 2, and the opposite side of the guide channels 2 is also connected with the same number of guide channels 2, so that the guide channels 2 are mutually symmetrical on the filtering channel 1. In this case, the flow guide channels 2 in multiple directions are arranged in the filtering channel 1 to guide out the clean air, and the air flow directions of the clean air guide out are symmetrical, so that the impurities in the filtering channel 1 are stressed in a balanced manner, the impurities are not particularly biased to the direction of a certain flow guide channel 2, the impurities can better move towards the impurity outlet 102 at the center of the filtering channel 1, and meanwhile, more clean air can be guided out by increasing the flow guide channels 2. Through the symmetrical connection water conservancy diversion passageway 2 on filtering passageway 1, can realize that impurity atress is more balanced in filtering passageway 1, keeps the central point at filtering passageway 1 better to more water conservancy diversion passageways 2 have improved clean air's derivation efficiency.

In a preferred embodiment of the present invention, the two ends of the filtering passage 1, i.e. the atmosphere inlet 101 and the impurity outlet 102, have at least one fan 3 installed therein, and the fans 3 installed at the two places can generate the airflow directed from the atmosphere inlet 101 to the impurity outlet 102. The normal work of air cleaner needs to have the air current from atmosphere entry 101 directional impurity export 102 in filtering passageway 1, when having the air current that satisfies the requirement in the external world, only need with atmosphere entry 101 to meet the direction of external air current and can realize air cleaner normal work, but when the external air current that does not satisfy the needs, then need the artificial air current of making to satisfy the needs of air cleaner work, install fan 3 at atmosphere entry 101 or impurity export 102, or both install fan 3, make this device can not rely on external air current and remove impurity, derive clean air, and realized that air current velocity is adjustable, the working process is more high-efficient.

In a preferred embodiment of the present invention, the air filter device further includes a housing 4, which is used to collect the clean air guided out from the guide channel 2 and uniformly transport the air to a designated area. The shape and size of the casing 4 can be set as required, the part of the filtering channel 1 connected with the flow guide channel 2 and the flow guide channel 2 are both installed in the casing 4, two ends of the filtering channel 1 extend out of the casing 4, the part of the filtering channel 1 connected with the casing 4 is provided with a sealing structure, clean air cannot leak from the part, the casing 4 is provided with a clean air outlet 401 for conveying the clean air to a designated area, and the clean air outlet 401 can be connected with an air conveying pipeline, for example, the clean air outlet 401 is connected with an air inlet of an internal combustion engine. The number of the filtering channels 1 and the flow guide channels 2 is not fixed, as shown in fig. 3 to 5, one or more sets of filtering channels 1 and flow guide channels 2 may be arranged in parallel in the casing 4, the casing 4 may be circular, square or other shapes, and the casing 4 may collect the clean air separated from each set of filtering channels 1 and flow guide channels 2 and deliver the collected clean air from the clean air outlet 401. Wherein, the air outlet 401 can also be installed with a fan to adjust the flow rate of the clean air. Establish casing 4 outside water conservancy diversion passageway 2 through the cover and wrap up water conservancy diversion passageway 2, can carry clean air to the appointed region through clean air outlet 401, make air filter's use more convenient, can be applicable to more occasions.

In a preferred embodiment of the present invention, the included angle α is 10 ° to 60 °, for example, 15 °, 25 °, 35 °, 40 °, 59 °, etc. Although the included angle alpha is smaller than 90 degrees, the air can flow obliquely backwards after entering the inlet of the flow guide channel, but the dust removal effect is not ideal when the included angle alpha is larger. The velocity of the air flow in the guide passage 2 is a vector and can be regarded as being composed of a first vector opposite to the direction of the air flow in the filter passage 1 and a second vector perpendicular to the direction of the air flow in the filter passage 1. When the included angle α is large, the first vector is small, the second vector is large, the attraction of the guide channel 2 to the impurities is strong, the impurities are easily led out from the guide channel 2, the separation effect of the air and the impurities is poor, and therefore the included angle α should be small, and the included angle α is preferably not greater than 60 °. When the included angle α is extremely small, the first vector is extremely large, the second vector is extremely small, and air can hardly flow into the flow guide channel 2, so that clean air cannot be guided out, and therefore, the included angle α cannot be too small, and is preferably not less than 10 °. Through setting up contained angle alpha between 10 to 60, can make impurity be difficult for getting into water conservancy diversion passageway 2, clean air can easily get into water conservancy diversion passageway 2 simultaneously, from the effect of realizing better air and impurity separation.

The utility model discloses an in preferred embodiment, be provided with gas pocket 201 on the filtration passageway 1, there is water conservancy diversion piece 202 at the edge connection of this gas pocket 201, at this moment, gas pocket 201 is the water conservancy diversion passageway entry promptly, the space between two adjacent water conservancy diversion pieces 202 is water conservancy diversion passageway 2, the surface and the clean air contact of water conservancy diversion piece 202, so the surface of water conservancy diversion piece 202 is water conservancy diversion passageway 2's inner wall promptly, the direction of water conservancy diversion passageway 2 has been decided to the direction of water conservancy diversion piece 202, so the contained angle between water conservancy diversion piece 202 and the side of filtering passageway 1 is contained angle alpha promptly. The shape of the guide vane 202 may be selected from various shapes, such as a rectangle, a square, a diamond, a trapezoid, a semicircle, etc. with a plane or a curved surface. The air holes 201 are formed in the filtering channel 1, the guide pieces 202 are connected along the edges of the air holes 201, the guide channel 2 can be connected to the side face of the filtering channel 1, and therefore clean air and impurities are separated.

In a preferred embodiment of the present invention, the baffle 202 is in the shape of a straight line, a circular arc or a broken line. When a linear guide vane is adopted, the included angle between the guide vane 202 and the side surface of the filtering channel 1 is the included angle alpha, and air flows along the direction of the guide vane 202 when passing through; when the circular arc-shaped guide vane 203 is adopted, the included angle between the tangent line at the midpoint of the circular arc-shaped guide vane 203 and the side surface of the filtering channel 1 is the included angle alpha, air flows along the direction of the circular arc-shaped guide vane 203 when passing through, and the integral flowing direction of the air and the filtering channel 1 form the included angle alpha; when the zigzag-shaped guide vane 204 is adopted, the part of the zigzag-shaped guide vane 204 inclined to the side surface of the filtering channel 1 determines the whole direction of the zigzag-shaped guide vane, the included angle between the zigzag-shaped guide vane 204 and the side surface of the filtering channel 1 is the included angle alpha, air flows along the direction of the part of the zigzag-shaped guide vane 204 inclined to the side surface of the filtering channel 1 when passing through the zigzag-shaped guide vane, then is folded to the direction opposite to the air flow in the filtering channel 1, and finally is led out from the guide channel 2. The flow guide plates in the shape of straight lines, circular arcs or broken lines can form the flow guide channel 2, so that the separation of clean air and impurities is realized, and the device is simple in structure and easy to realize.

In a preferred embodiment of the present invention, the filtering passage 1 includes an expansion section 103 and a contraction section 104. The cross-sectional area of the expansion section 103 is larger than that of the tightening section 104, the tightening section 104 has two parts, which are respectively connected with the expansion section 103 at two ends of the expansion section 103, namely, the atmospheric air inlet 101 and the impurity outlet 102 of the filtering channel 1 are both directly connected with the tightening section 104, and the expansion section 103 is connected between the two tightening sections 104. All the flow guide channels 2 are fixed on the side surface of the expanding section 103, and the flow guide channels 2 are not arranged on the side surface of the tightening section 104. The portion where the expanding section 103 and the contracting section 104 are connected is used for transition of two sections of different cross-sectional areas of the filtering passage 1, so that an angle is necessarily formed between the inner wall of the portion and the inner wall of the contracting section 104, for convenience of description, the positional relationship between the two surfaces is described by the included angle of the two surfaces, which is defined as an included angle β, and the included angle β is smaller than 90 °. When air flows in the tightening section 104, the air flow speed is higher due to the smaller cross-sectional area of the tightening section 104, so that a higher speed can be provided for impurities; when the air flows to the expansion section 103, because the cross sectional area of the expansion section 103 is larger, the impurities are relatively far away from the inlet of the flow guide channel, the air flow speed is slower, and the impurities have higher speed before passing through the expansion section 103, the impurities still can be kept at higher speed in the expansion section 103 due to the inertia effect, so that the time for the impurities to pass through the expansion section 103 can be shortened as much as possible, and the probability of the impurities entering the flow guide channel 2 is reduced. However, if no inclined inner wall is provided between the tightening segment 104 and the expanding segment 103 for transition, when air flows from the tightening segment 104 to the expanding segment 103, the air will be separated from the inner wall of the expanding segment 103, and the amount of clean air discharged from the flow guide channel 2 will decrease; when air flows from the expanding section 103 to the contracting section 104, a vortex is generated at a part where the expanding section 103 is connected with the contracting section 104, and the air flow is blocked, thereby affecting the discharge of impurities. Therefore, the portion of the expanding section 103 that connects to the contracting section 104 should have a transitional shape, i.e., the included angle β should be less than 90 °, so that the air is as close as possible to the inner wall of the expanding section 103, the generation of vortices is minimized, or the generation of vortices is minimized.

Through setting the filtration passageway 1 to the structure that extension section 103 and tightening section 104 are connected to the part that extension section 103 and tightening section 104 are connected is less than 90 with tightening section 104's contained angle beta, can further reduce the probability that impurity gets into water conservancy diversion passageway 2, improves the impurity removal effect, and the reduction of the efficiency that water conservancy diversion passageway 2 derived clean air is limited, still has good filtration air's effect on the whole.

In a preferred embodiment of the present invention, the included angle β is 1 ° to 30 °, such as 10 °, 20 °, 30 °, etc. The transition part between the expansion section 103 and the tightening section 104 is more gentle, the effect that the air clings to the inner wall is better, the possibility that the vortex is generated is smaller, and even if the vortex is generated, the vortex is smaller, so that when the included angle beta is 1-30 degrees, the effect that the air in the filtering channel 1 clings to the inner wall is good, the influence generated by the vortex is small, and the effect that the impurity removal effect is improved and the efficiency that the flow guide channel 2 leads out clean air is not reduced basically can be achieved.

The utility model discloses a preferred embodiment, filter the both ends of passageway 1, atmosphere entry 101 and impurity export 102, the two or have one to be the structure of buckling, perhaps the two is the structure of buckling, and the space that air cleaner device totality was occupied like this can be as little as possible to the bending of both ends can not influence atmosphere entering and impurity discharge. One end or two ends of the filtering channel 1 are arranged to be bent, so that the space occupied by the air filtering device can be reduced as much as possible, and the air filtering device can be installed in various different environments.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. An air cleaner assembly, comprising:

the two ends of the filtering channel are both of non-closed structures, wherein one end of the filtering channel is used for air to enter, and the other end of the filtering channel is used for discharging impurities;

the flow guide channels are fixed on the side surfaces of the filtering channels and are communicated with the filtering channels, the sum of the sectional areas of the flow guide channels is larger than the sectional area of the filtering channel, an included angle alpha is formed between the flow guide channels and the filtering channels, and the included angle alpha is smaller than 90 degrees.

2. An air cleaner arrangement according to claim 1 wherein the guide channels are symmetrically connected to the sides of the cleaner channel.

3. An air cleaning device according to claim 1, wherein at least one end of the cleaning channel is fitted with a fan.

4. The air filtering device according to claim 1, further comprising a housing, wherein the flow guide channel and a part of the filtering channel connected with the flow guide channel are mounted in the housing, two ends of the filtering channel extend out of the housing, the housing is provided with a clean air outlet, and the number of the filtering channels is one or more.

5. An air cleaning device according to claim 1, wherein the included angle α is 10 ° to 60 °.

6. An air cleaner according to claim 1 wherein the flow guide channel includes air holes formed in a side surface of the air cleaner channel and a flow guide plate fixedly connected to an edge of the air holes.

7. An air cleaner according to claim 6 wherein the deflector is rectilinear, arcuate or dog-eared.

8. The air filtering device according to claim 1, wherein the filtering channel comprises an expansion section and a tightening section, the tightening section is connected to two ends of the expansion section respectively, the cross-sectional area of the expansion section is larger than that of the tightening section, the flow guide channel is fixed to the side surface of the expansion section, an included angle β is formed between the inner wall of the part, connected with the tightening section, of the expansion section and the inner wall of the tightening section, and the included angle β is larger than 0 ° and smaller than 90 °.

9. An air cleaner assembly according to claim 8 wherein the included angle β is 1 ° to 30 °.

10. An air cleaner arrangement according to claim 1 wherein at least one of the ends of the cleaner channel is of a bent configuration.