A self-cleaning air intake duct and dust collection device

Abstract

This invention discloses a self-cleaning air inlet duct and dust collection device, comprising: a first end for introducing an external air source into the air inlet duct and a second end connected to a dust collection tank inlet so that the air source entering from the first end is introduced into the dust collection tank; a plurality of air supply sections are provided on the wall between the first end and the second end, which spray air sources toward the air inlet duct, the air supply direction of the air supply sections being inclined relative to the air intake direction of the air inlet duct, the air source being sprayed into the air inlet duct by the air supply sections and sprayed along the wall toward the second end so that the air source cleans the dust particles attached to the wall. This invention uses independently supplied air supply sections to blow dust from the inner wall of the air inlet duct, so that the airflow effectively reaches the inner wall surface of the air inlet duct, reducing dead corner residue, providing a self-cleaning function, and reducing manual maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of dust collection device technology, and in particular to a self-cleaning air inlet duct and dust collection device. Background Technology

[0002] With the rapid development of the manufacturing industry, more and more factories are being built. Places with high environmental quality requirements, such as gold and silver jewelry processing factories, are equipped with dust collection systems to collect dust and particulate matter from industrial production. However, existing dust collection systems are prone to dust accumulation on the inner walls of the collection devices, and because they are mostly enclosed cavities, they are difficult to clean. In particular, the inner walls of the air inlet ducts, far from the air inlet, accumulate dust severely due to the lack of airflow, requiring regular disassembly and cleaning, which wastes a lot of manpower and resources. Summary of the Invention

[0003] To address the problem of dust accumulation on the inner wall of the air intake duct of existing dust collection systems, this invention provides an air intake duct and dust collection device with self-cleaning function. The air supply unit with independent air supply blows the dust on the inner wall of the air intake duct, so that the air field effectively reaches the inner wall surface of the air intake duct, reducing dead corner residue, and has a self-cleaning function, thus reducing manual maintenance costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an air inlet duct with self-cleaning function, comprising: a first end for introducing an external air source into the air inlet duct and a second end connected to the inlet of a dust collection tank so that the air source entering from the first end is introduced into the dust collection tank;

[0005] The wall between the first end and the second end is provided with a plurality of air supply parts that spray air towards the air inlet duct. The air supply direction of the air supply parts is inclined relative to the air inlet direction of the air inlet duct. The air source is sprayed into the air inlet duct by the air supply parts and sprayed along the wall towards the second end so that the air source cleans the dust particles attached to the wall.

[0006] As a further improvement of the present invention: the air supply unit has an air inlet hole for connecting the air source and an air outlet penetrating the wall of the air inlet pipe, and an air supply pipe with a gradually increasing diameter from the air inlet hole to the air outlet. The air supply pipe is fixed obliquely on the air inlet pipe so that the air supply pipe obliquely sprays the air source into the air inlet pipe through the air outlet.

[0007] As a further improvement of the present invention: the diameter of the air inlet hole is 0.08-0.15 times the diameter of the first end of the air inlet pipe.

[0008] As a further improvement of the present invention: the air inlet duct includes a first pipe section, the first pipe section being arranged along the axial direction of the air inlet duct and having a straight wall portion of the same diameter and a first end portion for introducing an external air source, the air source inlet direction of the first pipe section being parallel to the axial direction of the air inlet duct.

[0009] As a further improvement of the present invention: the air inlet duct includes a second pipe section, the second pipe section having a large pipe opening connecting to the first pipe section and a small pipe opening connecting to the dust collection tank inlet, and an inclined wall portion located between the large pipe opening and the small pipe opening. The inclined wall portion of the second pipe section has a first inclination angle relative to the straight wall portion of the first pipe section, so that after the air source of the first pipe section enters the second pipe section, the air source near the wall portion impacts the inclined wall portion and is refracted and deflected by the inclined wall portion before being squeezed toward the axial position of the air inlet duct and accelerated towards the dust collection tank.

[0010] As a further improvement of the present invention: the first tilt angle is 120°-150°.

[0011] As a further improvement of the present invention: the air supply section has a plurality of air supply sections arranged in rows on the inclined wall section, and the inclined wall section is provided with at least two rows of air supply sections arranged in a circumferential direction around the axis. The air supply direction of the air supply section has a second tilt angle relative to the inclined wall section, so that the air source of the air supply section is obliquely sprayed into the second pipe section from the air supply port and blown along the inner wall of the inclined wall section to impact the dust particles on the inner wall, so that the dust particles are introduced into the dust collection tank with the airflow direction.

[0012] As a further improvement of the present invention: the second tilt angle is 5°-30°.

[0013] As a further improvement of the present invention: the air inlet duct includes a third pipe section, the third pipe section having a second end connected to the inlet of the dust collection tank and a narrow opening wall portion that accelerates the introduction of the air source and air source of the second pipe section, so that the air source and air source drive fine dust particles to flow into the dust collection tank, and the diameter of the narrow opening wall portion is less than or equal to the minimum diameter of the inclined wall portion of the second pipe section.

[0014] On the other hand, the present invention also provides the following technical solution: a dust collection device, including an air inlet pipe with self-cleaning as described above, wherein the second end of the air inlet pipe is connected to the inlet of the dust collection tank, so that the air source carrying dust particles entering from the first end passes through the first pipe section, and flows towards the third pipe section with the air source of the second pipe section and the dust particles blown off by the air source and attached to the inner wall, and the flow is accelerated in the third pipe section and flows through the second end to the dust collection tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention uses an independently supplied air supply unit to blow away dust from the inner wall of the air intake duct, so that the airflow can effectively reach the inner wall surface of the air intake duct, reducing dead corner residue, and has a self-cleaning function, thus reducing manual maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solution, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] The markings in the diagram indicate: 100: first end, 110: air inlet direction, 200: second end, 300: dust collection trough, 400: air supply section, 410: air supply direction, 420: air inlet, 430: air outlet, 440: air supply duct, 510: first pipe section, 520: second pipe section, 530: third pipe section, α: first tilt angle, β: second tilt angle. Detailed Implementation

[0020] In order to clearly and completely understand the technical solution, the present invention will be further described in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] This invention relates to an air inlet duct with self-cleaning properties, such as... Figure 1 As shown, it includes: a first end 100 for introducing an external air source into an air inlet duct and a second end 200 connected to the inlet of a dust collection tank 300 so that the air source entering from the first end 100 is introduced into the dust collection tank 300; the wall between the first end 100 and the second end 200 is provided with a plurality of air supply sections 400 that spray air sources toward the air inlet duct, the air supply direction 410 of the air supply sections 400 is inclined relative to the air intake direction 110 of the air inlet duct, and the air source is sprayed into the air inlet duct by the air supply sections 400 and sprayed along the wall toward the second end 200 so that the air source cleans the dust particles attached to the wall.

[0025] An external air source carrying dust particles enters the air inlet duct through the first end. The airflow direction is along the axial direction of the air inlet duct. After passing through the second end, the air enters the dust collection tank, where the dust particles are collected. The airflow from the air source is difficult to reach the inner wall away from the first end after entering the air inlet duct, leading to dust accumulation on the inner wall near the second end or the dust collection tank. In this embodiment, multiple air supply units spray air onto the inner wall of the air inlet duct. The air supply direction is along the wall, and the air entering through the air supply units directly acts on the inner wall of the duct, impacting and cleaning the dust particles adhering to the inner wall, causing them to flow according to the airflow direction and enter the dust collection tank. Although the air inlet direction and the air supply direction form a certain angle, they both point towards the second end or towards the dust collection tank, further increasing the overall kinetic energy of the airflow towards the dust collection tank, accelerating the gas flow, and allowing the airflow to effectively reach the inner wall surface, reducing dead corner residue and improving dust collection efficiency. Dust particles are collected after entering the dust collection trough. The air outlet system is located at the rear end of the dust collection trough, and the filtered air is diffused into the environment through the air outlet to ensure a relatively clean indoor air environment. It should be noted that the dust collection trough in this embodiment can use an existing dust collection trough. It is only necessary to ensure proper connection and sealing with the second end. No additional design of the dust collection trough is required. This embodiment does not impose any restrictions on the dust collection trough and the air outlet system.

[0026] In some embodiments, the air supply unit 400 has an air inlet 420 connected to an air source, an air outlet 430 penetrating the wall of the air inlet duct, and an air supply pipe 440 with a gradually increasing diameter from the air inlet 420 to the air outlet 430. The air supply pipe is fixed obliquely to the air inlet duct so that the air supply pipe obliquely sprays the air source into the air inlet duct through the air outlet. The air source of the air inlet duct is responsible for introducing dust particles in the air into the dust collection tank, and the air source of the air supply unit is responsible for cleaning the dust particles attached to the inner wall. The air inlet is smaller than the air outlet. The air source enters the air supply pipe through the small air inlet. Utilizing the pressurization effect of the small orifice, the air pressure of the incoming air source acts directly on the inner wall of the duct through the air outlet, impacting the dust particles on the inner wall and causing them to flow according to the airflow direction to enter the dust collection tank, thereby cleaning the inner wall of the air inlet duct.

[0027] In some embodiments, the diameter of the air inlet is 0.08-0.15 times the diameter of the first end of the air inlet duct, preferably 1 / 10 of the diameter of the first end. This diameter limit is a preferred value for the diameter of the air inlet, mainly to avoid the air inlet being too large and affecting the air intake volume of the air source entering the first end. In addition to considering the size of the diameter, the actual limitation also needs to take into account the air pressure of the air source and the air supply.

[0028] In some embodiments, the air inlet duct includes a first pipe section 510, which is arranged along the axial direction of the air inlet duct and has a straight wall portion of the same diameter and a first end portion 100 for introducing an external air source. The air source inlet direction 110 of the first pipe section is parallel to the axial direction of the air inlet duct.

[0029] The air inlet duct includes a second pipe section 520. The second pipe section has a large opening connecting to the first pipe section and a small opening connecting to the dust collection tank inlet, as well as an inclined wall portion located between the large opening and the small opening. The inclined wall portion of the second pipe section has a first inclination angle α relative to the straight wall portion of the first pipe section. The first inclination angle α can be selected from 120° to 150°, so that after the air source of the first pipe section enters the second pipe section, the air source near the wall portion impacts the inclined wall portion and is refracted and deflected by the inclined wall portion before being squeezed towards the axial position of the air inlet duct and accelerated towards the dust collection tank.

[0030] The air inlet duct includes a third pipe section 530, which has a second end connected to the inlet of the dust collection tank and a narrow opening wall that accelerates the introduction of the air source and air source of the second pipe section, so that the air source and air source drive fine dust particles to flow into the dust collection tank. The diameter of the narrow opening wall is less than or equal to the minimum diameter of the inclined wall of the second pipe section.

[0031] The air source is introduced from the first end, enters the second section through the first pipe section, and gradually narrows in diameter in the direction of air flow to form an inclined wall. As the air source passes through the large opening, the air source impacts the inclined wall and is refracted and deflected by the inclined wall before being squeezed toward the axial position of the air inlet pipe. Under the same air inlet pressure, the air source flow velocity toward the small opening continuously increases. The airflow velocity is maximized at the small opening at the smallest pipe diameter end or at the narrow opening wall of the third pipe section. The increased airflow velocity easily drives the flow of fine dust particles, thereby realizing the function of collecting fine dust particles.

[0032] In some embodiments, the air supply section has a plurality of air supply sections arranged in rows on the inclined wall section. The inclined wall section is provided with at least two rows of air supply sections arranged in a circumferential direction around the axis. The air supply direction of the air supply section has a second tilt angle β relative to the inclined wall section, so that the air source of the air supply section is obliquely sprayed into the second pipe section from the air supply port and blown along the inner wall of the inclined wall section to impact the dust particles on the inner wall, so that the dust particles are introduced into the dust collection tank with the airflow direction.

[0033] In some embodiments, the second tilt angle can be selected from 5° to 30°, preferably 25°. The air sources of the multiple air supply sections are sprayed along the air supply direction, and they can interact and impact each other in the second pipe section, thereby further improving the cleaning efficiency. The smaller the tilt angle, the more the air source of the air supply section acts on the inclined wall and the inner wall near the air outlet of the air supply section. The actual tilt angle is limited by the pipe diameter of the air inlet pipe, the pipe diameter of the inclined wall, or the tilt condition, etc.

[0034] On the other hand, the present invention also provides the following embodiment: a dust collection device, comprising a self-cleaning air inlet duct as described above, wherein the second end of the air inlet duct is connected to the inlet of a dust collection tank, so that the air source carrying dust particles entering from the first end passes through the first pipe section, and flows towards the third pipe section with the air source of the second pipe section and the dust particles blown off by the air source and attached to the inner wall, and the flow is accelerated in the third pipe section before flowing through the second end to the dust collection tank. The dust particles are collected after entering the dust collection tank, and the air outlet system is located at the rear end of the dust collection tank. The filtered air is diffused into the environment through the air outlet, ensuring a relatively clean indoor air environment.

[0035] In this embodiment, the entire dust collection device consists of a simple air intake system, a dust collection system, and an air outlet system. It does not have the traditional filtration system or fan system found on the market. It uses natural air as the carrier and is assembled with a simple shell to collect dust particles. This simplifies the device, minimizes resources, and reduces development and maintenance costs, especially in large factory environments.

[0036] This embodiment collects fine dust particles. The inner cavity of the air inlet duct has a self-cleaning function, eliminating the need for manual cleaning and reducing subsequent maintenance costs. It uses natural airflow as a carrier and is constructed with a simple shell to collect dust particles, thereby simplifying the device, minimizing resources, and reducing development costs.

[0037] The above disclosures are merely one or more preferred embodiments of the present invention, intended to help understand the inventive concept of the technical solution, and are not intended to limit the present invention in any other way. Any other equivalent or conventional substitution schemes made by those skilled in the art based on the features defined by the present invention shall still fall within the scope of the present invention.

Claims

1. A self-cleaning air inlet duct, characterized in that, include: It has a first end for introducing an external air source into an air inlet duct and a second end connected to a dust collection tank inlet so that the air source entering from the first end is introduced into the dust collection tank; The wall between the first end and the second end is provided with a plurality of air supply parts that spray air towards the air inlet duct. The air supply direction of the air supply parts is inclined relative to the air inlet direction of the air inlet duct. The air source is sprayed into the air inlet duct by the air supply parts and sprayed along the wall towards the second end so that the air source cleans the dust particles attached to the wall. The air inlet duct includes a first pipe section and a second pipe section. The first pipe section is arranged along the axial direction of the air inlet duct. The second pipe section has a large pipe opening connecting the first pipe section and a small pipe opening connecting the dust collection tank inlet, as well as an inclined wall portion located between the large pipe opening and the small pipe opening. The inclined wall portion of the second pipe section has a first inclination angle relative to the straight wall portion of the first pipe section, so that after the air source of the first pipe section enters the second pipe section, the air source near the wall portion impacts the inclined wall portion and is refracted and deflected by the inclined wall portion before being squeezed toward the axial position of the air inlet duct and accelerated towards the dust collection tank. The air source of the air supply unit is obliquely sprayed into the second pipe section through the air outlet and blown along the inner wall of the oblique wall to impact the dust particles on the inner wall, so that the dust particles are introduced into the dust collection tank by the airflow.

2. The self-cleaning air inlet duct according to claim 1, characterized in that: The air supply unit has an air inlet for connecting an air source and an air outlet that penetrates the wall of the air inlet pipe, as well as an air supply pipe with a gradually increasing diameter from the air inlet to the air outlet. The air supply pipe is fixed at an angle to the air inlet pipe so that the air supply pipe obliquely sprays the air source into the air inlet pipe through the air outlet.

3. The self-cleaning air inlet duct according to claim 2, characterized in that: The diameter of the air inlet hole is 0.08-0.15 times the diameter of the hole at the first end of the air inlet duct.

4. The self-cleaning air inlet duct according to claim 1, characterized in that: The first pipe section has a straight wall section with the same pipe diameter and a first end for introducing an external air source. The air source inlet direction of the first pipe section is parallel to the axial direction of the air inlet pipe.

5. The self-cleaning air inlet duct according to claim 1, characterized in that: The first tilt angle is 120°-150°.

6. The self-cleaning air inlet duct according to claim 1, characterized in that: The air supply section has multiple air supply sections arranged in rows on the inclined wall section. The inclined wall section is provided with at least two rows of air supply sections arranged in a circumferential direction around the axis. The air supply direction of the air supply section has a second tilt angle relative to the inclined wall section.

7. The self-cleaning air inlet duct according to claim 6, characterized in that: The second tilt angle is 5°-30°.

8. The self-cleaning air inlet duct according to claim 1, characterized in that: The air inlet duct includes a third pipe section, which has a second end connected to the inlet of the dust collection tank and a narrow opening wall that accelerates the introduction of the air source and air source of the second pipe section, so that the air source and air source drive fine dust particles to flow into the dust collection tank. The diameter of the narrow opening wall is less than or equal to the minimum diameter of the inclined wall of the second pipe section.

9. A dust collection device, characterized in that: The invention includes a self-cleaning air inlet duct as described in any one of claims 1-8, wherein the second end of the air inlet duct is connected to the inlet of the dust collection tank, so that the air source carrying dust particles entering from the first end passes through the first pipe section, and flows towards the third pipe section with the air source of the second pipe section and the dust particles blown off by the air source and attached to the inner wall, and the flow is accelerated in the third pipe section and flows through the second end to the dust collection tank.

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