An air filter with intake compensation and active blowing and cleaning structure

Abstract

The present invention discloses an air filter with an intake compensation and active purge and dust cleaning structure, which belongs to the technical field of air filters and solves the problem that the existing air filter becomes clogged and cannot take in air after being used for a long time. The air filter includes a main air filter body, the main air filter body includes a main intake cavity, a main filter body and a main air outlet, the main air outlet is arranged at one end of the main air filter body, and a bypass air filter body is provided at the other end of the main air filter body, and a bypass air filter body is provided on the bypass air filter body for controlling the air intake of the bypass air filter body. The air filter with an intake compensation and active purge and dust cleaning structure of the present invention ensures that the engine has sufficient air intake, effectively improves the safety and reliability of the engine, and has the characteristics of wide application range and strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of air filters, and in particular to an air filter with an intake compensation and active blowing and cleaning structure. Background Art

[0002] At present, the air filter of the internal combustion engine is used to filter the intake air of the internal combustion engine. The air filter can make the dust, oil mist and other stains in the inhaled air be adsorbed on the filter material, or separate the dust, particles, oil stains and the like in the intake air through cyclone centrifugal method. Ensure the cleanliness of the intake air to avoid the occurrence of problems such as piston cylinder pulling and abnormal wear of the valve seat ring seal due to poor intake cleanliness; and ensure sufficient intake volume to avoid problems such as power reduction and combustion deterioration caused by insufficient engine intake. Common filter materials for air filters include filter paper, non-woven fabrics, and wire mesh. For desert air filters, cyclone centrifugal structures, oil baths, and filter paper are used to adsorb and separate the intake air.

[0003] Existing air filters, especially those with paper or wire mesh filter elements, will have their filtration resistance increased significantly after long-term use, with dust, particles, oil stains and other dirt sticking to the filter element surface. If they are not replaced in time, the engine air intake will be insufficient and performance will deteriorate. In extreme cases, the air filter will be sucked flat by the larger engine intake suction force or the compressor intake suction force of the supercharger. If the internal structure of the air filter is damaged and falls off after being sucked flat, the detached foreign matter will enter the engine's intake system and even enter the cylinder, causing damage to the engine's pistons, valves and other moving parts, seriously affecting the engine's operating safety and reliability. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an air filter with intake compensation and active blowing and cleaning structure in view of the above-mentioned deficiencies in the prior art, so as to ensure that the engine has sufficient intake volume, effectively improve the safety and reliability of the engine, and have the characteristics of wide application range and strong practicality.

[0005] The technical solution adopted by the present invention is: an air filter with intake compensation and active blowing and cleaning structure, including a main air filter body, the main air filter body including a main intake cavity, a main filter body and a main air outlet, the main air outlet is arranged at one end of the main air filter body, and a bypass air filter body is provided at the other end of the main air filter body, a bypass air filter body is provided on the bypass air filter body for controlling the air intake of the bypass air filter body, an air supply device connected to the main intake cavity is provided on one end of the main air filter body away from the main air outlet, a position switch is provided on the bypass air filter body, a contact probe of the position switch is in contact with the bypass intake valve, and the position switch is electrically connected to the air supply device.

[0006] As a further improvement, the bypass air filter body includes a bypass air intake chamber cover plate, a bypass filter body and a bypass air intake chamber, the bypass air intake chamber cover plate is arranged on the open end of the bypass filter body, a bypass air intake channel is opened on the bypass air intake chamber cover plate, the bypass air intake channel is connected to the bypass air intake chamber, and the bypass air intake valve is arranged on the bypass air intake channel.

[0007] Furthermore, the bypass intake valve includes a support guide rod and a valve, one end of the support guide rod is fixedly connected to the bypass air filter body, the support guide rod is fixedly connected to a spring seat, the valve sliding sleeve is arranged on the support guide rod, a return spring is arranged between one side of the valve and the spring seat, and the other side of the valve is in contact with the bypass intake chamber cover plate.

[0008] Furthermore, a spring guide sleeve is provided on the valve, and the return spring is installed in the spring guide sleeve.

[0009] Furthermore, the other end of the support guide rod is threadedly connected with a limit bolt for limiting the position of the valve.

[0010] Furthermore, the air replenishing device includes an air tank and an electronic control unit. The air tank is provided with compressed air. The output end of the air tank is connected to an air source outlet pipeline. An air circuit switch is provided on the air source outlet pipeline. The output end of the air circuit switch is connected to the main air intake cavity through an air intake compensation pipeline. The electronic control unit is electrically connected to the position switch and the air circuit switch through a signal control harness.

[0011] Furthermore, the intake compensation pipeline is connected to the main intake chamber through an intake nozzle, and the intake nozzle is installed on the main air filter body.

[0012] Furthermore, the bypass air intake chamber cover is connected to the main air filter body via connecting bolts.

[0013] Furthermore, the ratio of the bypass air intake channel diameter to the main air intake cavity inner diameter is 0.25-0.45, the ratio of the bypass air intake channel diameter to the bypass air intake cavity inner diameter is 0.65-0.75, and the ratio of the bypass air intake channel diameter to the main air outlet inner diameter is 0.45-0.65.

[0014] Beneficial Effects

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

[0016] The present invention provides an air filter with intake compensation and active purge and dust cleaning structure. Under normal use, only the filter body of the main air filter works. When the main filter body is blocked and a certain amount of negative pressure is reached, the bypass intake valve will open, and the filter body of the bypass air filter starts to work and directly enters the intake pipe of the engine. When the bypass intake valve is opened, the position switch will synchronously sense the opening action of the bypass intake valve and return it to the electronic control unit through a voltage signal. The electronic control unit then outputs a control signal to the air path switch, and the air path switch will open the compensation air path channel from the air source to the main air filter. The compensation air path nozzle in the main air filter will spray high-pressure gas, which can be used to replenish the gas and purge the filter bodies of the main air filter and the bypass air filter at the same time, thereby ensuring that after the traditional air filter is blocked, the bypass intake structure is opened and fresh intake air can enter the engine through the bypass intake structure, ensuring that the engine has sufficient intake air and the engine does not suffer a significant drop in power or even stall due to insufficient intake air. By setting up an air replenishment device, it is compensated that the bypass intake structure is unable to replenish sufficient fresh intake air to the engine in a short period of time due to the blockage of the air filter, thereby improving the problem of deterioration of the transient performance of the engine caused by this. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 It is a left-side structural schematic diagram of the present invention;

[0019] Figure 3 It is a right view structural schematic diagram of the present invention;

[0020] Figure 4 It is a schematic cross-sectional view of the bypass intake valve when it is closed in the present invention;

[0021] Figure 5 It is a schematic cross-sectional view of the bypass intake valve when it is opened in the present invention.

[0022] Among them: 1-main air outlet, 2-main air filter body, 3-main air intake chamber, 4-main filter body, 5-bypass air filter body, 6-bypass air intake chamber, 7-bypass filter body, 8-support guide rod, 9-spring seat, 10-reset spring, 11-spring guide sleeve, 12-intake nozzle, 13-bypass air intake chamber cover, 14-valve, 15-position switch, 16-contact probe, 17-bypass air intake channel, 18-limit bolt, 19-connecting bolt, 20-air circuit switch, 21-air source outlet pipeline, 22-air storage tank, 23-signal control harness, 24-electronic control unit, 25-negative pressure indicator, 26-intake compensation pipeline. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0024] See also Figure 1-5As shown, an air filter with intake compensation and active blowing and cleaning structure of the present invention comprises a main air filter body 2, the main air filter body 2 comprises a main intake cavity 3, a main filter body 4 and a main air outlet 1, the main air outlet 1 is arranged at one end of the main air filter body 2, a bypass air filter body 5 is provided at the other end of the main air filter body 2, a bypass air filter body 5 is provided on the bypass air filter body 5 for controlling the intake of the bypass air filter body 5, an air supply device connected with the main intake cavity 3 is provided on one end of the main air filter body 2 away from the main air outlet 1, a position switch 15 is provided on the bypass air filter body 5, a contact probe 16 of the position switch 15 is in contact with the bypass intake valve, the position switch 15 is electrically connected with the air supply device, when the main filter body 4 of the main air filter body 2 is not seriously blocked , the fresh intake air will enter the main intake chamber 3 through the main filter body 4, and enter the intake port of the engine's supercharger compressor through the main air outlet 1, or directly enter the intake pipe of the engine for non-supercharged models, and set the opening pressure of the bypass intake valve to ≤-6kPa. When the main filter body 4 of the main air filter body 2 is seriously blocked, the engine intake resistance increases. When the engine intake negative pressure is higher than -6kPa, the valve 14 of the bypass intake valve begins to compress the return spring 10, and the bypass intake valve begins to open. The fresh intake air enters the bypass intake chamber 6 through the bypass intake channel 17, and then enters the main intake chamber 3 through the bypass filter body 7 and the bypass air filter body 5, and finally enters the intake port of the engine's supercharger compressor through the main air outlet 1, or directly enters the intake pipe of the engine for non-supercharged models. At the same time, after the valve 14 of the bypass intake valve begins to compress the reset spring 10, the position switch contact probe 16 in the position switch 15 moves synchronously against the valve 14, and the position switch 15 outputs a voltage signal to the electronic control unit 24, which then outputs a control signal to the gas circuit switch 20. The gas circuit switch 20 is turned on, and the high-pressure gas in the gas storage tank 22 enters the main intake chamber 3 through the intake compensation pipeline 26 and the intake nozzle 12. On the one hand, it can replenish the engine with a large amount of intake air required instantly, and on the other hand, it can purge the main filter body 4 and the bypass filter body 7 through the high-pressure intake air entering. The purge time is set by the program to last for 60±5 seconds. In this way, dust and foreign matter attached to the surface are blown away from the surface of the filter body, thereby reducing the internal resistance of the main filter body 4 and the bypass filter body 7, improving the filtering capacity and improving the passability of the fresh intake air.When the permeability and filtering capacity of the main filter body 4 and the bypass filter body 7 are improved, the valve 14 will be rebounded by the compression reset spring 10, and will be compressed and reset together with the contact probe 16 in the position switch 15. The position switch 15 outputs a reset signal to the electronic control unit 24, and the electronic control unit 24 then outputs a control signal to the air path switch 20. The air path switch 20 cuts off the air path, and the air filter continues to rely on its own filtering capacity to provide the engine with filtered clean fresh intake air. A negative pressure indicator 25 is provided on the main air filter body 2, and the detection end of the negative pressure indicator 25 extends into the main intake chamber 3. The negative pressure indicator 25 is a mechanical negative pressure indicator 25, such as a piston negative pressure indicator, which is used to detect the pressure in the main air filter body 2. When the negative pressure value is set to -6kPa, the slide valve with a warning color or warning text inside may be sucked out by the negative pressure and presented to the operator. When the operator finds the prompt, he needs to maintain the air filter as soon as possible.

[0025] Specifically, the bypass air filter body 5 includes a bypass air intake chamber cover plate 13, a bypass filter body 7 and a bypass air intake chamber 6. The bypass air intake chamber cover plate 13 is arranged on the open end of the bypass filter body 7. A bypass air intake channel 17 is opened on the bypass air intake chamber cover plate 13. The bypass air intake channel 17 is connected to the bypass air intake chamber 6. The bypass air intake valve is arranged on the bypass air intake channel 17. When the engine intake negative pressure is higher than -6kPa, the valve 14 of the bypass air intake valve opens, and fresh intake air enters the bypass air intake chamber 6 through the bypass air intake channel 17 to replenish air.

[0026] Preferably, the bypass intake valve includes a support guide rod 8 and a valve 14, one end of the support guide rod 8 is fixedly connected to the bypass air filter body 5, and the support guide rod 8 is fixedly connected to a spring seat 9, the valve 14 is slidably sleeved on the support guide rod 8, and a return spring 10 is provided between one side of the valve 14 and the spring seat 9, and the other side of the valve 14 is in contact with the bypass intake chamber cover plate 13. By selecting the return spring 10, the negative pressure of the valve 14 when it is opened is controlled to meet the requirement that when the engine intake negative pressure is higher than -6kPa, the valve 14 of the bypass intake valve can be opened smoothly.

[0027] Furthermore, a spring guide sleeve 11 is provided on the valve 14, and the return spring 10 is installed in the spring guide sleeve 11, which plays a role of positioning and guiding, so that the return spring 10 is more firm during the compression process.

[0028] Furthermore, the other end of the support guide rod 8 is threadedly connected with a limit bolt 18 for limiting the position of the valve 14, which plays a limiting role, so that the valve 14 can fit and seal with the bypass air intake cavity cover plate 13 during normal operation.

[0029] Furthermore, the air replenishing device includes an air tank 22 and an electronic control unit 24. Compressed air is provided in the air tank 22. The output end of the air tank 22 is connected to an air source outlet pipeline 21. An air circuit switch 20 is provided on the air source outlet pipeline 21. The output end of the air circuit switch 20 is connected to the main air intake chamber 3 through an air intake compensation pipeline 26. The electronic control unit 24 is electrically connected to the position switch 15 and the air circuit switch 20 through a signal control harness 23, respectively. The air circuit switch 20 is controlled by the electronic control unit 24 to realize that the high-pressure gas in the air tank 22 enters the main air intake chamber 3 through the air intake compensation pipeline 26 and the air intake nozzle 12. On the one hand, it can replenish the large amount of air intake required instantly for the engine. On the other hand, the main filter body 4 and the bypass filter body 7 can be purged by the incoming high-pressure air intake to play a cleaning role.

[0030] Furthermore, the intake compensation line 26 is connected to the main intake chamber 3 through the intake nozzle 12, and the intake nozzle 12 is installed on the main air filter body 2, so that the high-pressure gas in the gas tank 22 can simultaneously purge the main filter body 4 and the bypass filter body 7, thereby playing a cleaning role.

[0031] Furthermore, the bypass air intake chamber cover plate 13 is connected to the main air filter body 2 via connecting bolts 19, and a detachable installation method is used to facilitate replacement of the bypass filter body 7.

[0032] Furthermore, the ratio of the diameter of the bypass air intake passage 17 to the inner diameter of the main air intake chamber 3 is 0.25-0.45, the ratio of the diameter of the bypass air intake passage 17 to the inner diameter of the bypass air intake chamber 6 is 0.65-0.75, and the ratio of the diameter of the bypass air intake passage 17 to the inner diameter of the main air outlet 1 is 0.45-0.65, ensuring that the gas entering the bypass air intake passage 17 can meet the use of the engine.

[0033] When the air filter with intake compensation and active purge and dust removal structure of this embodiment is in use, when the main filter body 4 of the main air filter body 2 is not seriously blocked, the fresh intake air will enter the main intake chamber 3 through the main filter body 4, and enter the intake port of the engine's supercharger compressor through the main air outlet 1, or directly enter the intake pipe of the engine for non-supercharged models, and set the opening pressure of the bypass intake valve to ≤-6kPa. When the main filter body 4 of the main air filter body 2 is relatively blocked, the fresh intake air will enter the main intake chamber 3 through the main filter body 4, and enter the intake port of the engine's supercharger compressor through the main air outlet 1, or directly enter the intake pipe of the engine for non-supercharged models. It is a serious blockage, and the engine intake resistance increases. When the engine intake negative pressure is higher than -6kPa, the valve 14 of the bypass intake valve begins to compress the return spring 10, and the bypass intake valve begins to open. The fresh intake air enters the bypass intake chamber 6 through the bypass intake channel 17, and then enters the main intake chamber 3 through the bypass filter body 7 and the bypass air filter body 5, and finally enters the intake port of the engine's supercharger compressor through the main air outlet 1, or for non-supercharged models, directly enters the engine's intake pipe. At the same time, after the valve 14 of the bypass intake valve begins to compress the reset spring 10, the position switch contact probe 16 in the position switch 15 moves synchronously against the valve 14, and the position switch 15 outputs a voltage signal to the electronic control unit 24, which then outputs a control signal to the gas circuit switch 20. The gas circuit switch 20 is turned on, and the high-pressure gas in the gas storage tank 22 enters the main intake chamber 3 through the intake compensation pipeline 26 and the intake nozzle 12. On the one hand, it can replenish the engine with a large amount of intake air required instantly, and on the other hand, it can purge the main filter body 4 and the bypass filter body 7 through the high-pressure intake air entering. The purge time is set by the program to last for 60±5 seconds. In this way, dust and foreign matter attached to the surface are blown away from the surface of the filter body, thereby reducing the internal resistance of the main filter body 4 and the bypass filter body 7, improving the filtering capacity and improving the passability of the fresh intake air. When the permeability and filtering capacity of the main filter body 4 and the bypass filter body 7 are improved, the valve 14 will be rebounded by the compression reset spring 10, and the contact probe 16 in the position switch 15 will be pressed and reset together. The position switch 15 outputs a reset signal to the electronic control unit 24, and the electronic control unit 24 then outputs a control signal to the air path switch 20. The air path switch 20 cuts off the air path, and the air filter continues to rely on its own filtering capacity to provide the engine with filtered clean fresh intake air. The air filter with intake compensation and active purge and dust removal structure of the present invention, by setting a bypass intake structure, when the main air filter body is blocked, the fresh intake air can enter the engine through the bypass intake structure, ensuring that the engine has sufficient intake air and the engine will not cause a significant drop in power or even stall due to insufficient intake air. At the same time, it has an active purge and dust removal function, and has the characteristics of wide application range and strong practicality.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An air filter with intake compensation and active purge and dust removal structure, It is characterized in that The invention comprises a main air filter body (2), wherein the main air filter body (2) comprises a main air inlet cavity (3), a main filter body (4) and a main air outlet (1), wherein the main air outlet (1) is arranged at one end of the main air filter body (2), and a bypass air filter body (5) is arranged at the other end of the main air filter body (2), and a bypass air filter body (5) is arranged on the bypass air filter body (5) for controlling the air intake of the bypass air filter body (5), and a bypass air inlet valve communicating with the main air inlet cavity (3) is arranged on one end of the main air filter body (2) away from the main air outlet (1). The bypass air filter body (5) is provided with a position switch (15), a contact probe (16) of the position switch (15) contacts the bypass air intake valve, the position switch (15) is electrically connected to the air replenishing device, the bypass air filter body (5) comprises a bypass air intake cavity cover plate (13), a bypass filter body (7) and a bypass air intake cavity (6), the bypass air intake cavity cover plate (13) is arranged on the open end of the bypass filter body (7), a bypass air intake passage (17) is provided on the bypass air intake cavity cover plate (13), and the bypass air intake passage (17) is provided on the bypass air intake cavity cover plate (13). The bypass air intake passage (17) is connected to the bypass air intake chamber (6), the bypass air intake valve is arranged on the bypass air intake passage (17), the bypass air intake valve comprises a support guide rod (8) and a valve (14), one end of the support guide rod (8) is fixedly connected to the bypass air filter body (5), a spring seat (9) is fixedly connected to the support guide rod (8), the valve (14) is slidably sleeved on the support guide rod (8), a return spring (10) is arranged between one side of the valve (14) and the spring seat (9), and the other side of the valve (14) is connected to the bypass air intake chamber. The cover plate (13) is fitted, and the air replenishing device includes an air tank (22) and an electronic control unit (24). Compressed air is provided in the air tank (22). The output end of the air tank (22) is connected to an air source outlet pipeline (21). An air circuit switch (20) is provided on the air source outlet pipeline (21). The output end of the air circuit switch (20) is connected to the main air intake chamber (3) through an air intake compensation pipeline (26). The electronic control unit (24) is electrically connected to the position switch (15) and the air circuit switch (20) through a signal control harness (23).

2. An air filter with intake compensation and active purge and dust removal structure according to claim 1, It is characterized in that The valve (14) is provided with a spring guide sleeve (11), and the return spring (10) is installed in the spring guide sleeve (11).

3. An air filter with intake compensation and active purge and dust removal structure according to claim 1, It is characterized in that The other end of the support guide rod (8) is threadedly connected with a limit bolt (18) for limiting the position of the valve (14).

4. The air filter with intake compensation and active purge and dust removal structure according to claim 1, It is characterized in that The intake compensation pipeline (26) is connected to the main intake chamber (3) through an intake nozzle (12), and the intake nozzle (12) is installed on the main air filter body (2).

5. An air filter with intake compensation and active purge and dust removal structure according to claim 1, It is characterized in that The bypass air intake chamber cover plate (13) is connected to the main air filter body (2) via connecting bolts (19).

6. An air filter with intake compensation and active purge and dust removal structure according to claim 1, It is characterized in that The ratio of the diameter of the bypass air inlet channel (17) to the inner diameter of the main air inlet chamber (3) is 0.25 to 0.45, the ratio of the diameter of the bypass air inlet channel (17) to the inner diameter of the bypass air inlet chamber (6) is 0.65 to 0.75, and the ratio of the diameter of the bypass air inlet channel (17) to the inner diameter of the main air outlet (1) is 0.45 to 0.65.

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