A multi-filter air filter assembly

Abstract

The utility model discloses a kind of multiple filtration air filter assembly, including tank body and cover plate, filter element is installed in tank body, filter element separates second filter cavity and air outlet cavity in tank body, air outlet passage is communicated with air outlet cavity and is set on tank body, cover plate is equipped with baffle on tank body, baffle extends multiple bosses, multiple ventilation channels are penetrated in boss, ventilation channel is communicated with second filter cavity, cover plate is covered on baffle, first filter cavity is formed between cover plate and baffle, multiple air inlet channels are penetrated in cover plate, air inlet channel is communicated with first filter cavity, spiral blade is equipped in air inlet channel, the diameter of boss is less than the diameter of air inlet channel, boss is worn into air inlet channel, gap is spaced between the inner wall of air inlet channel and the outside of boss, air inlet channel is communicated with ventilation channel. The utility model provides a kind of multiple filtration air filter assembly, by primary filtration intercepts large particle dust, reduces secondary filter element load, prolongs its service life.

Description

Technical Field

[0001] This utility model relates to the field of air filtration, and in particular to a multi-stage air filter assembly. Background Technology

[0002] Air compressors are widely used power equipment in the industrial field. When they are running, they need to draw in a large amount of air from the environment and compress it. In order to ensure the quality of compressed air and protect the precision components inside the compressor from wear or contamination, it is necessary to install an air filter at the air inlet of the compressor.

[0003] The core filtration element is a cartridge or plate-and-frame filter cartridge, typically composed of multiple layers of fiber filter media (such as non-woven fabric or synthetic fibers) or metal mesh. The filter cartridge is installed inside the filter housing, which has an inlet and an outlet. Ambient air enters through the inlet of the filter housing under the negative pressure of the compressor's suction. As the air flows through the filter cartridge, the solid particles it carries are intercepted and adsorbed by the fibers or mesh of the filter media. The filtered clean air then passes through the interior of the filter cartridge or the downstream space, and enters the compressor's intake pipe through the outlet of the housing.

[0004] The aforementioned existing air intake filtration systems, especially when the compressor is deployed in places with high dust concentration and harsh environments (such as mines, construction sites, carpentry workshops, ceramic factories, etc.), have a significant performance defect. Due to the large suction negative pressure generated by the compressor during operation, the airflow rate and velocity are high per unit time. This causes large-sized particles (large dust particles) in the air to be drawn into the filter at high speed and in large quantities. These large dust particles are the first to collide with and deposit on the outermost layer of the filter element's windward side. Because of their large size, these large dust particles quickly clog the pores on the filter element's surface, forming a dense "dust cake." This large dust particle easily causes surface clogging of the filter element, reducing its service life. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage air filter assembly that intercepts large dust particles through primary filtration, reduces the load on secondary filter elements, and extends their service life.

[0006] The technical solution adopted by the multi-stage filtration air filter assembly disclosed in this utility model is as follows:

[0007] The device includes a tank and a cover. A filter element is installed inside the tank, dividing the tank into a second filtration chamber and an air outlet chamber. An air outlet channel communicating with the air outlet chamber is provided on the tank body. A partition is provided on the top of the tank body, with multiple protrusions extending from the partition. Multiple ventilation channels penetrate the protrusions and communicate with the second filtration chamber. The cover is placed on the partition, forming a first filtration chamber between the cover and the partition. Multiple air inlet channels penetrate the cover and communicate with the first filtration chamber. Spiral blades are provided within the air inlet channels. The diameter of each protrusion is smaller than the diameter of the air inlet channel, and the protrusion extends into the air inlet channel. A gap exists between the inner wall of the air inlet channel and the outer side of the protrusion. The air inlet channel communicates with the ventilation channel.

[0008] As a preferred embodiment, the end of the air inlet channel away from the boss is provided with an annular step, and the spiral blade is located between the annular step and the boss.

[0009] As a preferred embodiment, the outer side of the boss is provided with a conical surface, the end of the boss with a smaller diameter is away from the partition, and the end of the boss with a larger diameter is close to the partition.

[0010] As a preferred embodiment, a limiting ring extends into the tank body, the air outlet channel is located within the limiting ring, the filter element is cylindrical, the top of the filter element touches the partition plate, the bottom of the filter element is sleeved on the outside of the limiting ring, and the outside of the filter element is covered with a sound insulation layer.

[0011] As a preferred embodiment, an inner core is installed inside the tank, the top of the inner core abuts against the inner wall of the filter element, the limiting ring is sleeved on the outside of the inner core, and the filter element cover is installed on the outside of the inner core.

[0012] As a preferred embodiment, the tank body has multiple spaced-apart limiting plates extending from it, the multiple limiting plates are arranged around the partition, and a slot is formed between two adjacent limiting plates. The cover plate has multiple insert plates extending from it, and the insert plates are inserted into the slots for fixation.

[0013] As a preferred embodiment, the cover plate has a cleaning channel that communicates with the first filter chamber, and the cleaning channel is covered with a sealing cover.

[0014] The beneficial effects of the multi-stage filtration air filter assembly disclosed in this utility model are:

[0015] The air outlet duct is installed at the air inlet of the compressor. When the compressor operates and draws air from the outside, the outside air enters the ventilation duct through the air inlet duct. The spiral blades guide the airflow, forming a spiral airflow in the air inlet duct. This causes large dust particles in the air to generate centrifugal force due to their own weight, causing them to enter the first filter chamber through the gaps on the inner wall of the air inlet duct, achieving primary filtration to intercept large dust particles. The air carrying fine dust enters the second filter chamber through the ventilation duct. The air must pass through the filter element before it can enter the compressor through the air outlet chamber and air outlet duct. The filter element intercepts fine dust in the air. Fine dust is less likely to clog the filter element, thereby reducing the workload of the secondary filter element and extending its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a multi-stage air filter assembly according to the present invention.

[0017] Figure 2 This is a schematic diagram of the installation of the tank and partition of a multi-stage air filter assembly according to this utility model.

[0018] Figure 3 This is a schematic diagram of the installation of the tank and cover plate of a multi-filtration air filter assembly according to this utility model.

[0019] Figure 4 This utility model relates to a multi-stage air filter assembly. Figure 3 (Area A) Enlarged view.

[0020] Figure 5 This is a cross-sectional view of a multi-filter air filter assembly according to the present invention.

[0021] Figure 6 This utility model relates to a multi-stage air filter assembly. Figure 5 (Area B) Enlarged view. Detailed Implementation

[0022] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0023] Please refer to Figure 1 and Figure 2 .

[0024] The present invention discloses a multi-stage air filter assembly, comprising a tank 1 and a cover plate 3;

[0025] The tank 1 is equipped with a filter element 12 and an inner core 13. In this embodiment, the filter element 12 is preferably cylindrical. The filter element 12 divides the tank 1 into a second filtration chamber and an air outlet chamber. The second filtration chamber is located on the outside of the filter element 12, and the filtration area of ​​the filter element 12 is located in the middle of the filter element 12. The outside of the filter element 12 is covered with a sound insulation layer. In this embodiment, the sound insulation layer is preferably made of fiber cotton. The sound insulation layer made of fiber cotton has no filtration function and will not affect the air passing through the filter element 12.

[0026] Furthermore, in this embodiment, the inner core 13 is preferably cylindrical and made of fiber cotton. The fiber cotton can effectively reflect some noise, achieving sound insulation and noise reduction. The filter element 12 is sleeved on the outside of the inner core 13, and the air outlet cavity is located inside the inner core 13. The inner core 13 made of fiber cotton has no filtration function and will not affect the air entering the air outlet cavity from the second filter cavity.

[0027] Furthermore, an air outlet channel 111 is provided at the bottom of the tank body 1, and the air outlet channel 111 is connected to the air outlet cavity; a limiting ring 112 extends from the bottom inside the tank body 1, the air outlet channel 111 is located inside the limiting ring 112, the diameter of the air outlet channel 111 is smaller than the inner ring diameter of the limiting ring 112, the bottom of the filter element 12 touches the bottom inside the tank body 1, the bottom of the filter element 12 is sleeved on the outside of the limiting ring 112, the top of the inner core 13 touches the inner wall of the filter element 12, the bottom of the inner core 13 touches the bottom inside the tank body 1, and the inner ring of the limiting ring 112 is sleeved on the outside of the inner core 13;

[0028] Furthermore, the top of the tank body 1 has an opening, through which the inner core 13 is inserted into the tank body 1 and locked inside the limiting ring 112. Then, the filter element 12 is inserted into the tank body 1 through the opening, covering the outer side of the inner core 13 and locked inside the limiting ring 112. The limiting ring 112 constrains the filter element 12 and the inner core 13 inside the tank body 1, preventing the filter element 12 and the inner core 13 from moving horizontally.

[0029] Please refer to Figures 2-5 .

[0030] The opening cover of the tank body 1 is provided with a partition 2, and multiple protrusions 21 extend from the partition 2. In this embodiment, it is preferred that there are eight protrusions 21, which are arranged around the center of the partition 2. Multiple ventilation channels 211 pass through the top of the protrusions 21, and the ventilation channels 211 are connected to the second filter chamber. The top of the filter element 12 touches the partition 2, and the partition 2 can limit the filter element 12 inside the tank body 1 to prevent the filter element 12 and the inner core 13 from moving in the vertical direction.

[0031] Furthermore, the smaller diameter end of the boss 21 is far away from the partition 2, while the larger diameter end of the boss 21 is close to the partition 2, so that the boss 21 can guide some air onto the partition 2.

[0032] Please refer to Figure 1 and Figures 3-6 .

[0033] Multiple spaced limiting plates 113 extend from the tank body 1. The multiple limiting plates 113 are arranged around the partition 2. The limiting plates 113 are located at the edge of the opening, and a slot is formed between two adjacent limiting plates 113.

[0034] The bottom of the cover plate 3 extends with multiple insert plates. The bottom of the cover plate 3 covers the partition plate 2 and the tank body 1. The insert plates are inserted into adjacent slots for fixation, thereby fixing the cover plate 3 to the tank body 1. The bottom of the cover plate 3 touches the partition plate 2, constraining the partition plate 2 to the tank body 1.

[0035] Furthermore, a first filter chamber is formed between the cover plate 3 and the partition plate 2. Multiple air inlet channels 311 are passed through the cover plate 3. In this embodiment, it is preferred that there are eight air inlet channels 311, and the eight air inlet channels 311 correspond to eight protrusions 21. The air inlet channels 311 are connected to the first filter chamber.

[0036] Furthermore, the boss 21 penetrates into the air intake channel 311, and the air intake channel 311 is connected to the ventilation channel 211. The diameter of the boss 21 is smaller than the diameter of the air intake channel 311. In this embodiment, the center of the air intake channel 311 is coaxial with the center of the boss 21, so that there is a gap between the inner wall of the air intake channel 311 and the outer side of the boss 21.

[0037] Furthermore, a spiral blade 32 is provided inside the air inlet channel 311, and the center of the spiral blade 32 is coaxial with the center of the air inlet channel 311; an annular step is provided at the end of the air inlet channel 311 away from the boss 21, and the spiral blade 32 is located between the annular step and the boss 21. The top of the boss 21 touches the bottom of the spiral blade 32, and the top of the spiral blade 32 touches the annular step, so as to prevent the spiral blade 32 from rotating inside the air inlet channel 311.

[0038] When outside air enters the ventilation channel 211 from the air intake channel 311, the spiral blades 32 guide the airflow, causing the air to form a spiral airflow within the air intake channel 311.

[0039] A cleaning channel 312 is provided on the cover plate 3, which is connected to the first filter chamber, and a sealing cover 33 is provided on the cleaning channel 312.

[0040] When too much large dust particles are collected in the first filter chamber, the sealing cover 33 is opened, and an external vacuum cleaner is connected to the cleaning channel 312. The external vacuum cleaner removes the large dust particles from the first filter chamber, thus cleaning the first filter chamber.

[0041] Please refer to Figures 1-6 .

[0042] During use, the primary and secondary filtration processes are as follows:

[0043] The air outlet duct 111 is installed at the air inlet of the external compressor. When the compressor is running and drawing air to the outside, the air flows through the air inlet duct 311 and the ventilation duct 211 in sequence into the second filter chamber. After being filtered by the filter element 12, the air in the second filter chamber passes through the inner core 13, the air outlet chamber and the air outlet duct 111 into the air inlet of the compressor.

[0044] When air passes through the air inlet channel 311, the airflow is guided by the spiral blades 32, which form a spiral airflow in the air inlet channel 311. This causes large dust particles in the air to be thrown towards the inner wall of the air inlet channel 311 under the action of centrifugal force, and then enter the first filter chamber through the gaps along the inner wall of the air inlet channel 311 for one filtration to intercept large dust particles.

[0045] Air carrying fine dust enters the second filter chamber through ventilation channel 211. The air then passes through the sound insulation layer, filter element 12, and inner core 13 in sequence before entering the air outlet chamber. The air is filtered a second time by filter element 12 to remove fine dust. The filtered air then enters the external compressor through air outlet channel 111. Fine dust is less likely to clog filter element 12, thus reducing the workload of the secondary filter element 12 and extending its service life.

[0046] During use, the process of reducing noise generated by the external compressor transmitted through the air filter assembly is as follows:

[0047] Noise generated by the external compressor enters the air outlet cavity through the air outlet duct 111. The inner core 13, made of fiber cotton, absorbs and attenuates the noise in the first round. After passing through the inner core 13, some noise is absorbed and attenuated a second time through the sound insulation layer on the outside of the filter element 12. A small portion of the noise passes through the sound insulation layer and then through the air inlet duct 311. Because the blades of the spiral blade 32 have an angled flow guiding structure, the noise undergoes multiple reflections between the blades of the spiral blade 32, resulting in three rounds of sound insulation. Through the design of the three-round sound insulation structure, the air filter assembly can significantly reduce the noise generated by the external compressor and achieve a noise reduction effect.

[0048] This invention provides a multi-stage air filter assembly. The air outlet channel is installed at the air inlet of the compressor. When the compressor operates and draws air from the outside, the outside air enters the ventilation channel through the air inlet channel. The spiral blades guide the airflow, forming a spiral airflow in the air inlet channel. This causes large dust particles in the air to generate centrifugal force due to their own weight, causing them to enter the first filter chamber through the gaps on the inner wall of the air inlet channel, thus achieving primary filtration to intercept large dust particles. The air carrying fine dust enters the second filter chamber through the ventilation channel. The air must pass through the filter element before it can enter the compressor through the air outlet chamber and the air outlet channel. The filter element intercepts fine dust in the air. Fine dust is less likely to clog the filter element, thus reducing the workload of the secondary filter element and extending its service life.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A multi-stage air filter assembly, characterized in that, include: The tank body has a filter element installed inside, which divides the tank body into a second filtration chamber and an air outlet chamber. The tank body has an air outlet channel that connects to the air outlet chamber. The tank body is covered with a partition plate, and multiple protrusions extend from the partition plate. Multiple ventilation channels pass through the protrusions and are connected to the second filtration chamber. A cover plate is placed on a partition plate, forming a first filter chamber between the cover plate and the partition plate. Multiple air inlet channels are passed through the cover plate and communicate with the first filter chamber. Spiral blades are provided inside the air inlet channels. The diameter of the boss is smaller than the diameter of the air inlet channel. The boss extends into the air inlet channel. There is a gap between the inner wall of the air inlet channel and the outer side of the boss. The air inlet channel communicates with a ventilation channel.

2. The multi-stage air filter assembly as described in claim 1, characterized in that, The air inlet channel has an annular step at the end away from the boss, and the spiral blade is located between the annular step and the boss.

3. The multi-stage filtration air filter assembly as described in claim 2, characterized in that, The outer side of the boss has a conical surface, with the smaller diameter end of the boss away from the partition and the larger diameter end close to the partition.

4. The multi-filtration air filter assembly as described in claim 3, characterized in that, A limiting ring extends from the inside of the tank, the air outlet channel is located inside the limiting ring, the filter element is cylindrical, the top of the filter element touches the partition plate, the bottom of the filter element is sleeved on the outside of the limiting ring, and the outside of the filter element is covered with a sound insulation layer.

5. The multi-stage air filter assembly as described in claim 4, characterized in that, The tank contains an inner core, the top of which touches the inner wall of the filter element. The limiting ring is fitted on the outside of the inner core, and the filter element cover is placed on the outside of the inner core.

6. The multi-stage air filter assembly as described in claim 5, characterized in that, Multiple spaced limiting plates extend from the tank body, and the multiple limiting plates are arranged around the partition. A slot is formed between two adjacent limiting plates. Multiple insert plates extend from the cover plate, and the insert plates are inserted into the slots for fixation.

7. The multi-stage filtration air filter assembly as described in claim 6, characterized in that, The cover plate has a cleaning channel, which is connected to the first filter chamber, and the cleaning channel is covered with a sealing cover.

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