Pre-filter self-cleaning system and method for harvesting machinery

Abstract

The invention provides a pre-filter self-cleaning system and method for harvesting machinery. A prefilter self-cleaning system for harvesting machinery comprises a first valve, a soot blowing air supply pipe, a mesh enclosure self-cleaning device, a grass blowing air supply pipe, a second valve and an air supply device, the air supply device is connected with the first valve and the second valve through pipelines, the first valve is connected with a dust suction valve through the soot blowing air supply pipe, and the second valve is connected with a grass suction valve through the grass blowing air supply pipe. The mesh enclosure self-cleaning device is arranged adjacent to the pre-filter mesh enclosure, and the second valve is connected with the mesh enclosure self-cleaning device through the grass blowing air supply pipe. And the self-dust discharge of the prefilter and the self-cleaning of the mesh enclosure of the prefilter can be realized at the same time. Self-cleaning of the air inlet system of the harvesting machine is achieved, the harvesting efficiency is effectively improved, and the labor cost for cleaning the dust removal mesh enclosure and the dust deposition basin of the prefilter is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pre-filter cleaning devices, and in particular to a pre-filter self-cleaning system and method for harvesting machinery. Background Art

[0002] Agricultural machinery operates in harsh conditions, requiring pre-filtration before air enters the air filter. However, continuous operation can cause large amounts of grass clippings and impurities to adhere to the pre-filter screen, clogging the screen mesh and affecting air intake efficiency. This requires periodic manual cleaning of impurities from the screen. Furthermore, most pre-filters currently utilize a cyclone structure, which efficiently separates dust from the air. The separated dust collects in an ash basin, allowing for continuous operation. However, the ash basin requires manual cleaning after a period of operation. The air intake system of harvesters is typically located on the upper portion of the vehicle. Manual cleaning of the pre-filter screen and ash basin poses certain risks and increases the driver's workload. Improper cleaning of grass clippings and the ash basin can also result in impurities and dirt entering the body, endangering the operator's health. This problem is particularly acute when operating under heavy loads or in high-dust environments, where cleaning frequency increases. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a self-cleaning system and method for a pre-filter for a harvesting machine in view of the deficiencies in the prior art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A pre-filter self-cleaning system for a harvesting machine comprises: a first valve, a dust-blowing air supply pipe, a mesh cover self-cleaning device, a grass-blowing air supply pipe, a second valve and an air supply device, the air supply device being connected to the first valve and the second valve respectively through pipelines, the first valve being connected to the dust extraction valve through the dust-blowing air supply pipe, the mesh cover self-cleaning device being arranged adjacent to the pre-filter mesh cover, and the second valve being connected to the mesh cover self-cleaning device through the grass-blowing air supply pipe.

[0005] The beneficial effects of the technical solution of the present invention are as follows: after the first valve is opened, high-pressure air from the air supply device enters the dust extraction valve through the dust blowing air pipe, releasing the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, generating a strong suction force, attracting dust to move downward and blowing open the dust extraction valve below, achieving the purpose of automatic dust blowing and dust removal. After the second valve is opened, high-pressure air from the air supply device passes through the second valve and the grass blowing air pipe into the mesh cover self-cleaning device. The high-pressure air is blown toward the pre-filter mesh cover through the air outlet arranged in the cleaning device, achieving the purpose of mesh cover grass blowing and cleaning. It can simultaneously achieve self-dust removal and self-cleaning of the pre-filter mesh cover. It can achieve self-cleaning of the harvester's air intake system, effectively improve harvesting efficiency, and reduce the labor cost of cleaning the pre-filter dust removal mesh cover and dust accumulation basin.

[0006] Furthermore, the mesh cover self-cleaning device includes: an air channel, an air inlet, an air outlet and a fixed block, the air outlet is arranged at the end of the air channel, the air inlet is arranged on the side wall of the air channel, the air inlet is connected to the grass blowing air pipe, the air outlet is arranged adjacent to the pre-filter mesh cover, the air channel is fixedly connected to the fixed block, and the fixed block is fixedly connected to the pre-filter housing.

[0007] The above-mentioned further technical solution has the beneficial effect of allowing high-pressure air to enter the air passage through the air inlet and blow the pre-filter screen through the air outlet. The fixing block is used to stably mount the screen self-cleaning device on the pre-filter housing. This structure is simple and compact, reducing costs.

[0008] Furthermore, there are multiple air outlets, and the multiple air outlets surround the circumference of the pre-filter mesh cover.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that a plurality of air outlets surround the periphery of the pre-filter mesh cover, making it easy to blow grass around the periphery of the pre-filter mesh cover.

[0010] Furthermore, physical buttons are installed on the first valve and the second valve.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is as follows: after the first valve is opened, high-pressure air from the air supply device enters the dust extraction valve through the soot blowing air supply pipe, releasing the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, generating a strong suction force, attracting dust to move downward and blowing open the dust extraction valve below, thereby achieving the purpose of automatic soot blowing and dust removal. After the second valve is opened, high-pressure air from the air supply device passes through the second valve and the grass blowing air supply pipe into the mesh cover self-cleaning device. The high-pressure air is blown toward the pre-filter mesh cover through the air outlet arranged in the cleaning device, thereby achieving the purpose of grass blowing and cleaning the mesh cover. The pre-filter self-dust removal and pre-filter mesh cover self-cleaning can be achieved simultaneously. Both the second valve and the first valve are provided with physical buttons, which can realize manual control of the on and off of the two valves.

[0012] Furthermore, the first valve and the second valve are both connected to a controller, and a timer is installed in the controller.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: the controller can control the opening and closing of the first valve or the second valve, achieving automatic control of the pre-filter screen self-cleaning and dust removal from the pre-filter. The control system enables self-cleaning of the pre-filter screen and dust collection in the pre-filter, ensuring efficient engine air intake. The timer setting facilitates timing of dust blowing and dust removal.

[0014] Furthermore, the air supply device is connected to a pressure sensor, which is connected to the controller; the controller is connected to a separation valve for detecting whether the main clutch is engaged or disengaged.

[0015] The beneficial effects of adopting the above further technical solution are: the pressure sensor is used to detect the gas pressure generated by the gas supply device, and the separation valve is used to detect the main clutch state.

[0016] Furthermore, the mesh cover self-cleaning device is a polygonal structure or an annular structure; the pre-filter mesh cover is connected to an air filter outlet pipe, and the air filter outlet pipe is connected to the engine.

[0017] The beneficial effect of adopting the above further technical solution is that the mesh self-cleaning device has a polygonal structure or an annular structure, which facilitates the adaptation of the mesh self-cleaning device to the pre-filter mesh, and facilitates the installation and maintenance of the mesh self-cleaning device.

[0018] In addition, the present invention also provides a self-cleaning method for a pre-filter for a harvesting machinery, which is based on a self-cleaning system for a pre-filter for a harvesting machinery described in any one of the above items. The self-cleaning method for a pre-filter for a harvesting machinery includes: when the pre-filter needs to self-discharge dust, opening the first valve allows the air supply device to blow open the dust extraction valve through the dust blowing air pipe to achieve automatic dust blowing and dust removal; when the pre-filter mesh cover needs to be self-cleaned, closing the first valve and opening the second valve allows the air supply device to supply air to the mesh cover self-cleaning device through the grass blowing air pipe, and blowing grass on the pre-filter mesh cover through the mesh cover self-cleaning device to achieve self-cleaning of the pre-filter mesh cover.

[0019] The beneficial effects of the technical solution of the present invention are as follows: after the first valve is opened, high-pressure air from the air supply device enters the dust extraction valve through the dust blowing air pipe, releasing the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, generating a strong suction force, attracting dust to move downward and blowing open the dust extraction valve below, achieving the purpose of automatic dust blowing and dust removal. After the second valve is opened, high-pressure air from the air supply device passes through the second valve and the grass blowing air pipe into the mesh cover self-cleaning device. The high-pressure air is blown toward the pre-filter mesh cover through the air outlet arranged in the cleaning device, achieving the purpose of mesh cover grass blowing and cleaning. It can simultaneously achieve self-dust removal and self-cleaning of the pre-filter mesh cover. It can achieve self-cleaning of the harvester's air intake system, effectively improve harvesting efficiency, and reduce the labor cost of cleaning the pre-filter dust removal mesh cover and dust accumulation basin.

[0020] Furthermore, when the pre-filter needs to discharge dust by itself, the first valve is opened, so that the air supply device blows open the dust extraction valve through the soot blowing air pipe to realize the step of automatic soot blowing and dust removal, including: after the whole vehicle is started, it is judged whether the main clutch is engaged and whether the gas pressure generated by the air supply device meets the preset pressure; when the main clutch is engaged and the gas pressure generated by the air supply device meets the preset pressure, soot blowing and dust removal timing is performed; it is judged whether the duration of the soot blowing and dust removal timing reaches the first preset duration; when the duration of the soot blowing and dust removal timing reaches the first preset duration, the first valve is opened, so that the air supply device blows open the dust extraction valve through the soot blowing air pipe to realize automatic soot blowing and dust removal; when the main clutch is disengaged, the soot blowing and dust removal timing is paused, the first valve is closed, and the second valve is opened, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air pipe, and blows grass on the pre-filter mesh cover through the mesh cover self-cleaning device to realize self-cleaning of the pre-filter mesh cover.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are: automatic soot blowing and dust removal timing, automatic soot blowing and dust removal, automatic pause of soot blowing and dust removal timing, and automatic self-cleaning of the pre-filter cover according to the main clutch state and the gas pressure of the air supply device, thereby improving automation and reducing user labor intensity.

[0022] Furthermore, when the main clutch is disengaged, the dust blowing and dust removal timing is suspended, the first valve is closed, and the second valve is opened, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air supply pipe, and blows the grass on the pre-filter mesh cover through the mesh cover self-cleaning device to achieve the step of self-cleaning of the pre-filter mesh cover, including: when the main clutch is engaged again, the dust blowing and dust removal timing continues to be accumulated until the first preset time is reached, and the first valve is opened again to complete the automatic dust blowing and dust removal; after the whole vehicle is started, the step of judging whether the main clutch is engaged and whether the gas pressure generated by the air supply device meets the preset pressure includes: when the gas pressure generated by the air supply device is lower than the preset pressure, low pressure timing is performed; judging whether the duration of the low pressure timing reaches the second preset time; when the duration of the low pressure timing reaches the second preset time, an alarm is issued.

[0023] The beneficial effect of this further technical solution is that when the main clutch is re-engaged, the dust blowing and dust removal timer continues to accumulate, completing automatic dust blowing and dust removal. When the pressure sensor of the air supply device drops below a preset pressure for a second preset period of time, an alarm is triggered, thereby ensuring driving safety and effective cleaning of the pre-filter screen.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A schematic structural diagram of a pre-filter self-cleaning system for a harvesting machine provided by an embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of a mesh self-cleaning device according to an embodiment of the present invention;

[0027] Figure 3 This is one of the schematic flow charts of the self-cleaning method for a pre-filter for a harvesting machine provided in an embodiment of the present invention;

[0028] Figure 4 This is the second schematic flow chart of the self-cleaning method for a pre-filter for a harvesting machine provided in an embodiment of the present invention.

[0029] Explanation of the accompanying figures: 1. Engine; 2. Controller; 3. Solenoid valve; 4. Air filter outlet pipe; 5. Soot blowing air pipe; 6. Dust extraction valve; 7. Pre-filter mesh cover; 8. Mesh cover self-cleaning device; 9. Grass blowing air pipe; 10. Pulse valve; 11. Separation valve; 12. Air supply device; 13. Air inlet; 14. Air outlet; 15. Fixing block. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a pre-filter self-cleaning system for a harvesting machine, comprising: a first valve, a dust-blowing air supply pipe 5, a mesh cover self-cleaning device 8, a grass-blowing air supply pipe 9, a second valve and an air supply device 12, wherein the air supply device 12 is connected to the first valve and the second valve respectively through pipelines, the first valve is connected to the dust extraction valve 6 through the dust-blowing air supply pipe 5, the mesh cover self-cleaning device 8 is arranged adjacent to the pre-filter mesh cover 7, and the second valve is connected to the mesh cover self-cleaning device 8 through the grass-blowing air supply pipe 9.

[0032] The beneficial effects of the technical solution of the present invention are as follows: after the first valve is opened, high-pressure air from the air supply device enters the dust extraction valve through the dust blowing air pipe, releasing the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, generating a strong suction force, attracting dust to move downward and blowing open the dust extraction valve below, achieving the purpose of automatic dust blowing and dust removal. After the second valve is opened, high-pressure air from the air supply device passes through the second valve and the grass blowing air pipe into the mesh cover self-cleaning device. The high-pressure air is blown toward the pre-filter mesh cover through the air outlet arranged in the cleaning device, achieving the purpose of mesh cover grass blowing and cleaning. It can simultaneously achieve self-dust removal and self-cleaning of the pre-filter mesh cover. It can achieve self-cleaning of the harvester's air intake system, effectively improve harvesting efficiency, and reduce the labor cost of cleaning the pre-filter dust removal mesh cover and dust accumulation basin.

[0033] The gas supply device 12 may be a gas tank.

[0034] like Figure 1 and Figure 2 As shown, further, the mesh cover self-cleaning device 8 includes: an air channel, an air inlet 13, an air outlet 14 and a fixed block 15, the air outlet 14 is arranged at the end of the air channel, the air inlet 13 is arranged on the side wall of the air channel, the air inlet 13 is connected to the grass blowing air supply pipe 9, the air outlet 14 is arranged adjacent to the pre-filter mesh cover 7, the air channel is fixedly connected to the fixed block 15, and the fixed block 15 is fixedly connected to the pre-filter housing.

[0035] The above-mentioned further technical solution has the beneficial effect of allowing high-pressure air to enter the air passage through the air inlet and blow the pre-filter screen through the air outlet. The fixing block is used to stably mount the screen self-cleaning device on the pre-filter housing. This structure is simple and compact, reducing costs.

[0036] The mesh self-cleaning device 8 is mainly composed of an air inlet 13, an air outlet 14, a fixing block 15, and an air passage. The air inlet 13 is connected to the pulse valve 10 via the grass blowing air supply pipe 9. The air outlet 14 is a flat, long strip that can be evenly or unevenly distributed along the air filter passage according to the surface morphology of the pre-filter. High-pressure air can enter the high-pressure air passage (air passage) through the air inlet 13. The high-pressure air passage can be processed into different shapes according to the appearance and shape of the pre-filter, so that the annular air passage (air passage) is tightly attached to the surface of the mesh (pre-filter mesh 7). The fixing block 15 can be evenly or unevenly fixed to the pre-filter housing.

[0037] The number of the fixing blocks can be multiple and the fixing blocks can be an L-shaped plate, a rectangular plate, a connecting rod or a rectangular block.

[0038] The mesh self-cleaning device 8 can be located at the top, middle or bottom of the pre-filter mesh 7 .

[0039] There can be multiple air outlets, and the multiple air outlets can be located at the top, bottom, or top and bottom of the air channel (ie, air outlets are provided at both the upper and lower ends of the air channel).

[0040] When the mesh self-cleaning device 8 is located on the top of the pre-filter mesh 7, a plurality of air outlets may be located at the bottom end of the air passage.

[0041] When the mesh self-cleaning device 8 is located in the middle of the pre-filter mesh 7, a plurality of air outlets may be located at the bottom and top ends of the air passage.

[0042] When the mesh self-cleaning device 8 is located at the bottom of the pre-filter mesh 7, the plurality of air outlets may be located at the top end of the air passage.

[0043] like Figure 1 and Figure 2 As shown, further, there are multiple air outlets 14, and the multiple air outlets 14 surround the circumference of the pre-filter mesh cover 7.

[0044] The beneficial effect of adopting the above-mentioned further technical solution is that a plurality of air outlets surround the periphery of the pre-filter mesh cover, making it easy to blow grass around the periphery of the pre-filter mesh cover.

[0045] The cross-sectional shape of the air outlet can be, but is not limited to, a long strip. Users can select different cross-sectional shapes of the air outlet according to actual needs. For example, the cross-sectional shape of the air outlet can be circular, elliptical, triangular, diamond, square, or polygonal. The cross-sectional shape of the air outlet is a long strip to ensure uniform air supply and prevent the air outlet from being blocked.

[0046] like Figure 1 and Figure 2 As shown, further, physical buttons are installed on the first valve and the second valve.

[0047] The beneficial effect of adopting the above-mentioned further technical solution is as follows: after the first valve is opened, high-pressure air from the air supply device enters the dust extraction valve through the soot blowing air supply pipe, releasing the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, generating a strong suction force, attracting dust to move downward and blowing open the dust extraction valve below, thereby achieving the purpose of automatic soot blowing and dust removal. After the second valve is opened, high-pressure air from the air supply device passes through the second valve and the grass blowing air supply pipe into the mesh cover self-cleaning device. The high-pressure air is blown toward the pre-filter mesh cover through the air outlet arranged in the cleaning device, thereby achieving the purpose of grass blowing and cleaning the mesh cover. The pre-filter self-dust removal and pre-filter mesh cover self-cleaning can be achieved simultaneously. Both the second valve and the first valve are provided with physical buttons, which can realize manual control of the on and off of the two valves.

[0048] The first valve may be, but is not limited to, a solenoid valve 3 , and the second valve may be, but is not limited to, a pulse valve 10 .

[0049] like Figure 1 and Figure 2 As shown, further, the first valve and the second valve are both connected to a controller 2, and a timer is installed in the controller 2.

[0050] The beneficial effects of adopting the above-mentioned further technical solution are: the controller can control the opening and closing of the first valve or the second valve, achieving automatic control of the pre-filter screen self-cleaning and dust removal from the pre-filter. The control system enables self-cleaning of the pre-filter screen and dust collection in the pre-filter, ensuring efficient engine air intake. The timer setting facilitates timing of dust blowing and dust removal.

[0051] like Figure 1 and Figure 2 As shown, further, the air supply device 12 is connected to a pressure sensor, and the pressure sensor is connected to the controller 2; the controller 2 is connected to a separation valve 11, and the separation valve 11 is used to detect whether the main clutch is engaged or disengaged.

[0052] The beneficial effects of adopting the above further technical solution are: the pressure sensor is used to detect the gas pressure generated by the gas supply device, and the separation valve is used to detect the main clutch state.

[0053] like Figure 1 and Figure 2 As shown, further, the mesh cover self-cleaning device 8 is a polygonal structure or a ring structure; the pre-filter mesh cover 7 is connected to the air filter outlet pipe 4, and the air filter outlet pipe 4 is connected to the engine 1.

[0054] The beneficial effect of adopting the above further technical solution is that the mesh self-cleaning device has a polygonal structure or an annular structure, which facilitates the adaptation of the mesh self-cleaning device to the pre-filter mesh, and facilitates the installation and maintenance of the mesh self-cleaning device.

[0055] like Figure 1 and Figure 2 As shown, the main structure of the pre-filter self-cleaning system (pre-filter self-cleaning system for harvesting machinery) provided by the embodiment of the present invention is as follows: engine 1, controller 2, solenoid valve 3, air filter outlet pipe 4, soot blowing air pipe 5, dust extraction valve 6, pre-filter mesh cover 7, mesh cover self-cleaning device 8, grass blowing air pipe 9, pulse valve 10, vehicle main clutch and other sensors (separation valve 11) and air supply device 12, etc. When the vehicle performs harvesting operations for a period of time and the air supply device 12 has sufficient air volume, the controller 2 can control the opening of the solenoid valve 3 or the pulse valve 10. After the solenoid valve 3 is opened, the high-pressure air from the air supply device 12 enters the dust extraction valve 6 through the soot blowing air pipe 5, and releases the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, which generates a strong suction force, attracts dust to move downward and blows open the dust extraction valve 6 below, thereby achieving the purpose of automatic soot blowing and dust removal. After the pulse valve 10 is opened, the high-pressure air from the air supply device 12 passes through the pulse valve 10 and the grass-blowing air supply pipe 9 into the mesh cover self-cleaning device 8, and the high-pressure air is blown toward the pre-filter mesh cover 7 through the air outlet arranged in the cleaning device 8, thereby achieving the purpose of blowing grass and cleaning the mesh cover.

[0056] like Figure 3As shown, in addition, the present invention also provides a self-cleaning method for a pre-filter for a harvesting machinery, based on a self-cleaning system for a pre-filter for a harvesting machinery described in any one of the above, the self-cleaning method for a pre-filter for a harvesting machinery includes: when the pre-filter needs to self-discharge dust, open the first valve, so that the air supply device blows open the dust extraction valve through the dust blowing air pipe to realize automatic dust blowing and dust removal; when the pre-filter mesh cover needs to be self-cleaned, close the first valve, and open the second valve, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air pipe, and blows grass on the pre-filter mesh cover through the mesh cover self-cleaning device to realize self-cleaning of the pre-filter mesh cover.

[0057] The beneficial effects of the technical solution of the present invention are as follows: after the first valve is opened, high-pressure air from the air supply device enters the dust extraction valve through the dust blowing air pipe, releasing the high-pressure gas downward. The rapid flow of gas creates a low-pressure environment, generating a strong suction force, attracting dust to move downward and blowing open the dust extraction valve below, achieving the purpose of automatic dust blowing and dust removal. After the second valve is opened, high-pressure air from the air supply device passes through the second valve and the grass blowing air pipe into the mesh cover self-cleaning device. The high-pressure air is blown toward the pre-filter mesh cover through the air outlet arranged in the cleaning device, achieving the purpose of mesh cover grass blowing and cleaning. It can simultaneously achieve self-dust removal and self-cleaning of the pre-filter mesh cover. It can achieve self-cleaning of the harvester's air intake system, effectively improve harvesting efficiency, and reduce the labor cost of cleaning the pre-filter dust removal mesh cover and dust accumulation basin.

[0058] Furthermore, when the pre-filter needs to discharge dust by itself, the first valve is opened, so that the air supply device blows open the dust extraction valve through the soot blowing air pipe to realize the step of automatic soot blowing and dust removal, including: after the whole vehicle is started, it is judged whether the main clutch is engaged and whether the gas pressure generated by the air supply device meets the preset pressure; when the main clutch is engaged and the gas pressure generated by the air supply device meets the preset pressure, soot blowing and dust removal timing is performed; it is judged whether the duration of the soot blowing and dust removal timing reaches the first preset duration; when the duration of the soot blowing and dust removal timing reaches the first preset duration, the first valve is opened, so that the air supply device blows open the dust extraction valve through the soot blowing air pipe to realize automatic soot blowing and dust removal; when the main clutch is disengaged, the soot blowing and dust removal timing is paused, the first valve is closed, and the second valve is opened, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air pipe, and blows grass on the pre-filter mesh cover through the mesh cover self-cleaning device to realize self-cleaning of the pre-filter mesh cover.

[0059] The beneficial effects of adopting the above-mentioned further technical solution are: automatic soot blowing and dust removal timing, automatic soot blowing and dust removal, automatic pause of soot blowing and dust removal timing, and automatic self-cleaning of the pre-filter cover according to the main clutch state and the gas pressure of the air supply device, thereby improving automation and reducing user labor intensity.

[0060] Among them, the first preset time length can be 20 minutes.

[0061] Furthermore, when the main clutch is disengaged, the dust blowing and dust removal timing is suspended, the first valve is closed, and the second valve is opened, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air supply pipe, and blows the grass on the pre-filter mesh cover through the mesh cover self-cleaning device to achieve the step of self-cleaning of the pre-filter mesh cover, including: when the main clutch is engaged again, the dust blowing and dust removal timing continues to be accumulated until the first preset time is reached, and the first valve is opened again to complete the automatic dust blowing and dust removal; after the whole vehicle is started, the step of judging whether the main clutch is engaged and whether the gas pressure generated by the air supply device meets the preset pressure includes: when the gas pressure generated by the air supply device is lower than the preset pressure, low pressure timing is performed; judging whether the duration of the low pressure timing reaches the second preset time; when the duration of the low pressure timing reaches the second preset time, an alarm is issued.

[0062] The beneficial effect of this further technical solution is that when the main clutch is re-engaged, the dust blowing and dust removal timer continues to accumulate, completing automatic dust blowing and dust removal. When the pressure sensor of the air supply device drops below a preset pressure for a second preset period of time, an alarm is triggered, thereby ensuring driving safety and effective cleaning of the pre-filter screen.

[0063] Among them, the second preset time length can be 15S, and the preset pressure value can be 0.5MPa.

[0064] The pre-filter self-cleaning system control strategy is as follows: After the vehicle is started, the VCU controller (controller) begins counting when the main clutch is engaged and the air supply unit 12 generates the required gas pressure. After the vehicle has operated for a set period of time, the VCU controller sends an open signal to solenoid valve 3, which opens and completes a pre-filter dust blowing operation. When the separation valve is energized (i.e., the main clutch is disengaged), the dust blowing timer pauses, and the controller sends an open signal to pulse valve 10, completing the pre-filter screen cleaning operation. Upon detecting the main clutch engagement signal again, the dust blowing timer continues to accumulate until the set timer expires, at which point solenoid valve 3 opens again to complete the dust blowing operation. Furthermore, both pulse valve 10 and solenoid valve 3 are equipped with physical buttons for manual on / off control. Specifically, if the pressure sensor of the air supply unit 12 remains below 0.5 MPa for 15 seconds, an alarm is triggered, ensuring both driving safety and effective pre-filter cleaning.

[0065] like Figure 4 As shown, start the vehicle, 1. Determine whether the main clutch state and the gas tank pressure meet the preset requirements, 2. If the main clutch state and the gas tank pressure meet the preset requirements, the VCU (controller) performs timing, 3. Determine whether the separation valve is energized, 4. If the separation valve is not energized, determine whether the timing time T is greater than or equal to 20 minutes, 5. If the timing time T is greater than or equal to 20 minutes, open the solenoid valve for soot blowing, and return to step 2.

[0066] The steps after step 3 include: 6. If the separation valve is energized, stop timing; 7. Open the pulse valve to blow the grass, and return to step 1.

[0067] After step 4, the following steps are included: 8. If the time duration T is less than 20 minutes, return to step 2.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-filter self-cleaning system for a harvesting machine, characterized in that: include: A first valve, a dust-blowing air supply pipe (5), a mesh cover self-cleaning device (8), a grass-blowing air supply pipe (9), a second valve and an air supply device (12), wherein the air supply device (12) is connected to the first valve and the second valve respectively through pipelines, the first valve is connected to the dust extraction valve (6) through the dust-blowing air supply pipe (5), the mesh cover self-cleaning device (8) is arranged adjacent to the pre-filter mesh cover (7), and the second valve is connected to the mesh cover self-cleaning device (8) through the grass-blowing air supply pipe (9).

2. A pre-filter self-cleaning system for a harvesting machine according to claim 1, characterized in that: The mesh cover self-cleaning device (8) includes: an air channel, an air inlet, an air outlet and a fixed block, the air outlet is arranged at the end of the air channel, the air inlet is arranged on the side wall of the air channel, the air inlet is connected to the grass blowing air supply pipe (9), the air outlet is arranged adjacent to the pre-filter mesh cover (7), the air channel is fixedly connected to the fixed block, and the fixed block is fixedly connected to the pre-filter housing.

3. A pre-filter self-cleaning system for a harvesting machine according to claim 2, characterized in that: There are multiple air outlets, and the multiple air outlets surround the circumference of the pre-filter mesh cover (7).

4. A pre-filter self-cleaning system for a harvesting machine according to claim 1, characterized in that: Physical buttons are installed on the first valve and the second valve.

5. The self-cleaning system for a prefilter of a harvesting machine according to claim 1, characterized in that: The first valve and the second valve are both connected to a controller (2), and a timer is installed in the controller (2).

6. A pre-filter self-cleaning system for a harvesting machine according to claim 5, characterized in that: The air supply device (12) is connected to a pressure sensor, which is connected to the controller (2); the controller (2) is connected to a separation valve (11), which is used to detect whether the main clutch is engaged or disengaged.

7. A pre-filter self-cleaning system for a harvesting machine according to any one of claims 1 to 6, characterized in that: The mesh cover self-cleaning device (8) is a polygonal structure or an annular structure; the pre-filter mesh cover (7) is connected to an air filter outlet pipe (4), and the air filter outlet pipe (4) is connected to an engine (1).

8. A self-cleaning method for a prefilter for a harvesting machine, characterized in that: Based on the self-cleaning system for a prefilter for a harvesting machine according to any one of claims 1 to 7, the self-cleaning method for a prefilter for a harvesting machine comprises: When the pre-filter needs to discharge dust automatically, open the first valve so that the air supply device blows open the dust extraction valve through the dust blowing air pipe to achieve automatic dust blowing and discharge; When the pre-filter mesh needs to be self-cleaned, the first valve is closed and the second valve is opened, so that the air supply device supplies air to the mesh self-cleaning device through the grass blowing air pipe, and the mesh self-cleaning device blows the grass on the pre-filter mesh to achieve self-cleaning of the pre-filter mesh.

9. The self-cleaning method for a prefilter for a harvesting machine according to claim 8, characterized in that: When the pre-filter needs to automatically discharge dust, the first valve is opened so that the air supply device blows open the dust extraction valve through the soot blowing air pipe to realize automatic soot blowing and dust discharge, which includes: After the vehicle is started, determine whether the main clutch is engaged and whether the gas pressure generated by the gas supply device meets the preset pressure; When the main clutch is engaged and the gas pressure generated by the gas supply device meets the preset pressure, the soot blowing and dust removal timing is performed; Determine whether the duration of the dust blowing and dust removal timing reaches a first preset duration; When the dust blowing and dust removal timer reaches a first preset time, the first valve is opened so that the air supply device blows open the dust extraction valve through the dust blowing air pipe to achieve automatic dust blowing and dust removal; When the main clutch is disengaged, the dust blowing and dust removal timing is paused, the first valve is closed, and the second valve is opened, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air pipe, and the mesh cover self-cleaning device blows grass on the pre-filter mesh cover to achieve self-cleaning of the pre-filter mesh cover.

10. The self-cleaning method for a prefilter for a harvesting machine according to claim 9, characterized in that: When the main clutch is disengaged, the dust blowing and dust removal timing is suspended, the first valve is closed, and the second valve is opened, so that the air supply device supplies air to the mesh cover self-cleaning device through the grass blowing air supply pipe, and the mesh cover self-cleaning device blows the grass on the pre-filter mesh cover to achieve the self-cleaning step of the pre-filter mesh cover, including: when the main clutch is engaged again, the dust blowing and dust removal timing continues to be accumulated until the first preset time is reached, and the first valve is opened again to complete the automatic dust blowing and dust removal; After the vehicle is started, after the step of determining whether the main clutch is engaged and whether the gas pressure generated by the gas supply device meets the preset pressure, the method includes: when the gas pressure generated by the gas supply device is lower than the preset pressure, performing low pressure timing; Determine whether the low-voltage timing duration reaches a second preset duration; When the low pressure timing reaches the second preset time, an alarm is issued.

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