Self-backflushing air filter

Abstract

The utility model relates to air filter technical field, and disclose automatic backflushing air filter, including support, the support is installed with secondary filter and primary filter casing through the connecting frame, the primary filter casing is fixedly installed with the mounting sleeve, the mounting sleeve is equipped on the conveying cylinder, the mounting sleeve is equipped with the temporary storage cavity, the temporary storage cavity is at the primary filter element inside, and the temporary storage cavity is towards the primary filter element's one side opening, be provided with air source supply mechanism on the secondary filter. The utility model adopts two -stage filtration structure, cooperation pulse backflushing system, realizes efficient filtration and automatic dust cleaning, promotes engine air intake cleanliness, has automatic and manual backflushing mode, stable operation, easy maintenance, compact structure, safe and reliable, is applicable to the air purification demand of high -quality industrial equipment.

Description

Technical Field

[0001] This utility model relates to the field of air filter technology, specifically to an automatic backflushing air filter. Background Technology

[0002] In modern automotive engine systems, the air filter is a key component. Its main function is to filter dust, particulate matter, and other impurities contained in the air entering the engine combustion chamber to protect the engine from wear and ensure its efficient operation. However, in harsh environmental conditions (such as dusty, high-humidity, or poor air quality areas), the air filter is prone to clogging due to particulate matter buildup, leading to increased intake resistance, reduced engine power, and even increased fuel consumption and worsened emissions.

[0003] Most air filters currently in use employ dry paper or foam filter elements. These filters physically trap impurities from the air on their surface or within their pore structure. However, in actual use, these trapped impurities often lack an effective discharge path and cannot be removed by the system itself. Instead, they continuously accumulate in the filter element and the internal space of the filter housing.

[0004] As impurities accumulate, the air resistance of the filter element gradually increases, leading to a decrease in engine intake efficiency. This can result in a series of problems such as reduced power output, increased fuel consumption, incomplete combustion, and worsened emissions. In addition, long-term retention of impurities can also damage the filter element structure, reduce filtration efficiency, and even cause filter media to fall off, further affecting the stable operation of the engine.

[0005] Because traditional air filters generally lack an automatic cleaning mechanism, they must be manually inspected, cleaned, or have their filter elements replaced regularly to maintain their normal function. This not only increases maintenance costs and manpower burden, but also makes it difficult to guarantee the timeliness and thoroughness of cleaning, especially in high-dust environments or under continuous high-intensity operation conditions. Utility Model Content

[0006] The purpose of this invention is to solve the problems existing in the prior art by proposing an automatic backflush air filter that achieves efficient filtration and automatic dust removal, thereby improving the cleanliness of engine intake air.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic backflush air filter includes a bracket. A secondary filter and a primary filter housing are mounted on the bracket via a connecting frame. A primary filter element is disposed inside the primary filter housing. An installation sleeve is fixedly mounted on the primary filter housing and is fitted onto a conveying cylinder. A temporary storage cavity is formed on the installation sleeve, which is located inside the primary filter element and opens to the side facing the primary filter element. An air supply mechanism is provided on the secondary filter.

[0009] Preferably, the secondary filter and the primary filter housing are connected by a conveying cylinder, and the secondary filter is equipped with an exhaust channel.

[0010] Preferably, the air supply mechanism includes a compressed air storage tank and a pulse valve. The compressed air storage tank is fitted onto the exhaust channel, and an input pipe is embedded in the compressed air storage tank. The pulse valve is mounted on a bracket, and the input end of the pulse valve is connected to the input pipe. An output pipe is embedded in the output end of the pulse valve, and the other end of the output pipe is mounted on a mounting sleeve and is connected to a temporary storage chamber.

[0011] Preferably, a backflush controller is provided on the bracket, and the backflush controller is electrically connected to the pulse valve.

[0012] Preferably, the primary filter housing has exhaust holes equidistantly spaced on its upper side, and a speed-reducing cover is fixedly installed on the primary filter housing, with the speed-reducing cover corresponding to the position of the exhaust holes.

[0013] Preferably, the bottom of the primary filter housing is provided with waste discharge ports at equal intervals.

[0014] Preferably, quick-release end caps are movably installed on the side of the primary filter housing facing away from the conveying cylinder and on the side of the secondary filter facing away from the exhaust channel.

[0015] Preferably, the compressed air storage tank is equipped with an air safety valve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model of an automatic backflush air filter significantly improves efficiency through dual-stage filtration (primary coarse filter + secondary fine filter) and intelligent backflush regeneration technology: its innovative built-in storage chamber precisely guides compressed air into the primary filter element, and combined with the intelligent control of the pulse valve by the backflush controller (supporting automatic shutdown triggering or manual idle triggering, and equipped with 35-second interval inflation and 4-hour over-blowing protection), it achieves efficient removal of impurities; the speed reduction cover and exhaust port work together to optimize airflow discharge, and the bottom exhaust port quickly removes particles, greatly extending the filter element's life; at the same time, the quick-release end cap simplifies maintenance, and the air tank integrates a safety valve to eliminate the risk of overpressure, thus solving the pain points of traditional filters being prone to clogging and requiring frequent maintenance, ensuring that the engine continuously receives clean air and reducing operating costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the automatic backflush air filter proposed in this utility model;

[0019] Figure 2 This is a schematic diagram showing the installation position of the automatic backflush air filter backflush controller proposed in this utility model;

[0020] Figure 3 This is a schematic diagram showing the location of the exhaust port of the automatic backflush air filter proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the backflush airflow direction of the automatic backflush air filter proposed in this utility model.

[0022] In the diagram: 1. Bracket; 2. Connecting frame; 3. Secondary filter; 4. Primary filter housing; 5. Conveyor cylinder; 6. Compressed air storage tank; 7. Air safety valve; 8. Quick-release end cap; 9. Mounting sleeve; 10. Backflush controller; 11. Pulse valve; 12. Input pipe; 13. Output pipe; 14. Speed ​​reduction cover; 15. Exhaust port; 16. Waste outlet; 17. Primary filter element; 18. Temporary storage chamber; 19. Exhaust passage. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1 to 4 An automatic backflush air filter includes a bracket 1. The bracket 1 is equipped with a secondary filter 3 and a primary filter housing 4 via a connecting frame 2. The secondary filter 3 and the primary filter housing 4 are connected by a conveying cylinder 5. The primary filter housing 4 is equipped with a primary filter element 17, and the secondary filter 3 is equipped with an exhaust channel 19.

[0025] The bracket 1 serves as the supporting framework for the entire device. The secondary filter 3 and the primary filter housing 4 are the core filtration units, each housing filter elements of different precision. The conveyor cylinder 5 connects the two filtration units, forming a continuous airflow channel. The primary filter element 17 is located inside the primary filter housing 4 and is responsible for the first stage of coarse filtration. The exhaust channel 19 delivers the clean air processed by the secondary filter 3 to the engine intake system, ensuring that the engine draws in clean air to maintain efficient and stable operation.

[0026] An installation sleeve 9 is fixedly installed on the primary filter housing 4. The installation sleeve 9 is fitted onto the conveying cylinder 5. A temporary storage cavity 18 is opened on the installation sleeve 9. The temporary storage cavity 18 is located inside the primary filter element 17 and opens to the side facing the primary filter element 17. An air supply mechanism is provided on the secondary filter 3.

[0027] Preferably, the temporary storage chamber 18 is located inside the mounting sleeve 9 and extends into the internal space of the primary filter element 17 to facilitate the transport of airflow.

[0028] The mounting sleeve 9 is fixed on the primary filter housing 4 and surrounds the conveying cylinder 5. Its internal storage chamber 18 is located directly inside the primary filter element 17, and its opening faces the primary filter element 17. The storage chamber 18 can store backflushing compressed air and directly guide it to the internal chamber of the primary filter element 17 to achieve the backflushing effect. The air supply mechanism provides the power source for backflushing.

[0029] like Figure 2 As shown, the air supply mechanism includes a compressed air storage tank 6 and a pulse valve 11. The compressed air storage tank 6 is fitted onto the exhaust channel 19. An input pipe 12 is embedded in the compressed air storage tank 6. The pulse valve 11 is mounted on the bracket 1. The input end of the pulse valve 11 is connected to the input pipe 12. An output pipe 13 is embedded in the output end of the pulse valve 11. The other end of the output pipe 13 is mounted on the mounting sleeve 9, and the output pipe 13 is connected to the temporary storage chamber 18.

[0030] The air supply mechanism consists of a compressed air storage tank 6 (which stores high-pressure air and is fitted onto the exhaust channel 19 to save space) and a pulse valve 11 (which controls the release of airflow). The input pipe 12 delivers the compressed air inside the compressed air storage tank 6 to the pulse valve 11. The pulse valve 11 receives the compressed air from the compressed air storage tank 6 (through the input pipe 12) and opens instantly upon receiving a command. When it opens, the high-pressure air is quickly delivered through the output pipe 13 to the temporary storage chamber 18 of the mounting sleeve 9 to provide an air source for the backflushing action.

[0031] like Figure 2 As shown, a backflush controller 10 is provided on the bracket 1, and the backflush controller 10 is electrically connected to the pulse valve 11.

[0032] The function of the backflush controller 10 is to monitor the system status (such as differential pressure and time) and send electrical signal commands to the pulse valve 11 according to a preset program to precisely control the start time, duration and frequency of the backflush action.

[0033] The following are two use cases;

[0034] Automatic backflush: After the ignition key is turned off, it will automatically recognize and backflush 3 times, with an interval of 35 seconds between each time (inflation time). The next backflush will not be allowed until at least 4 hours later to prevent frequent excessive backflush from causing abnormal situations.

[0035] Manual backflushing: The backflushing button on the panel can only be pressed and released for 2 seconds when the machine is stopped or idling. Each press will backflush once. A maximum of 3 manual backflushing cycles are allowed (with an interval of 35 seconds between each cycle). The next backflushing is allowed only after at least 4 hours to prevent frequent overflushing from causing abnormal situations.

[0036] like Figure 3 , Figure 4 As shown, exhaust holes 15 are equidistantly provided on the upper side of the primary filter housing 4, and a speed reduction cover 14 is fixedly installed on the primary filter housing 4, with the speed reduction cover 14 corresponding to the position of the exhaust holes 15.

[0037] The exhaust holes 15 are evenly distributed on the top of the primary filter housing 4, which can guide the blown compressed air so that most of it can be discharged smoothly. The speed reduction cover 14 is installed in the position directly opposite the exhaust holes 15. Its function is to reduce the speed of the airflow discharged from the exhaust holes 15 and reduce turbulence.

[0038] like Figure 3 As shown, the bottom of the primary filter housing 4 is provided with waste discharge ports 16 at equal intervals.

[0039] The exhaust ports 16 are evenly distributed at the bottom of the primary filter housing 4. Their function is to allow the dust, particles and other impurities intercepted by the primary filter element 17 to be smoothly discharged from the primary filter housing 4 under the action of gravity or backflush airflow, so as to prevent impurities from accumulating in the housing and affecting the filtration effect and equipment life.

[0040] like Figure 1 As shown, quick-release end caps 8 are movably installed on the side of the primary filter housing 4 away from the conveying cylinder 5 and the side of the secondary filter 3 away from the exhaust channel 19.

[0041] The quick-release end caps 8 are installed on the primary filter housing 4 (away from the conveyor cylinder 5) and the secondary filter 3 (away from the exhaust channel 19) by means of snaps or other means. They can be opened easily and quickly, providing direct access to the internal primary filter element 17 and secondary filter element (not shown in the figure), facilitating regular inspection, cleaning, or replacement maintenance of the filter elements.

[0042] like Figure 1 As shown, the compressed air storage tank 6 is equipped with an air safety valve 7. The core function of the air safety valve 7 is to automatically open and release pressure when the internal pressure of the compressed air storage tank 6 unexpectedly rises due to malfunction or other reasons and exceeds the set safety limit, so as to prevent the storage tank from exploding or causing serious safety accidents due to overpressure and to ensure the safety of equipment and users.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic backflush air filter, comprising a bracket (1), wherein a secondary filter (3) and a primary filter housing (4) are mounted on the bracket (1) via a connecting frame (2), and a primary filter element (17) is disposed inside the primary filter housing (4), characterized in that, An installation sleeve (9) is fixedly installed on the housing (4) of the primary filter. The installation sleeve (9) is sleeved on the conveying cylinder (5). A temporary storage cavity (18) is opened on the installation sleeve (9). The temporary storage cavity (18) is located inside the primary filter element (17), and the temporary storage cavity (18) opens to the side facing the primary filter element (17). An air supply mechanism is provided on the secondary filter (3).

2. The automatic backflush air filter according to claim 1, characterized in that, The secondary filter (3) and the primary filter housing (4) are connected by a conveying cylinder (5), and an exhaust channel (19) is installed on the secondary filter (3).

3. The automatic backflush air filter according to claim 1, characterized in that, The air supply mechanism includes a compressed air storage tank (6) and a pulse valve (11). The compressed air storage tank (6) is sleeved on the exhaust channel (19). An input pipe (12) is embedded in the compressed air storage tank (6). The pulse valve (11) is mounted on the bracket (1). The input end of the pulse valve (11) is connected to the input pipe (12). An output pipe (13) is embedded in the output end of the pulse valve (11). The other end of the output pipe (13) is mounted on the mounting sleeve (9), and the output pipe (13) is connected to the temporary storage chamber (18).

4. The automatic backflush air filter according to claim 3, characterized in that, The bracket (1) is provided with a backflush controller (10), which is electrically connected to the pulse valve (11).

5. The automatic backflush air filter according to claim 1, characterized in that, The primary filter housing (4) has exhaust holes (15) equidistantly opened on its upper side. A speed reduction cover (14) is fixedly installed on the primary filter housing (4), and the speed reduction cover (14) is positioned corresponding to the exhaust holes (15).

6. The automatic backflush air filter according to claim 1, characterized in that, The bottom of the primary filter housing (4) is provided with waste discharge ports (16) at equal intervals.

7. The automatic backflush air filter according to claim 1, characterized in that, The primary filter housing (4) on the side facing away from the conveying cylinder (5) and the secondary filter (3) on the side facing away from the exhaust channel (19) are both equipped with quick-release end caps (8).

8. The automatic backflush air filter according to claim 3, characterized in that, An air safety valve (7) is installed on the compressed air storage tank (6).

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