A vehicle air filter self-cleaning system

Abstract

This invention provides a vehicle-mounted air filter self-cleaning system, including an electromagnetic reversing valve. The input end of the electromagnetic reversing valve is connected to the outlet end of the vehicle's original air compressor via a pneumatic triplet, and its output end is connected to the input ends of both the vehicle-mounted pneumatic system and the air filter self-cleaning system. The air filter self-cleaning system includes an oil-gas filter, a speed control valve, and an air filter. The input end of the oil-gas filter is connected to the output end of the electromagnetic reversing valve, and its output end is connected in series with the speed control valve and a first check valve before connecting to the output end of the air filter. The input end of the air filter is connected to an external air source, and its output end is connected to the input end of the air conditioning ventilation system. This system utilizes internal compressed air to effectively clean the filter element relatively non-destructively, enhancing the filter element's filtration effect while extending its service life.

Description

Technical Field

[0001] This invention relates to the field of automotive air filtration equipment technology, and more particularly to an on-board air filter self-cleaning system. Background Technology

[0002] As people's living standards and quality of life continue to improve, the issue of in-vehicle air quality has received increasing attention. Air quality not only directly affects the driving experience of passengers but is also closely related to their health. New energy vehicles, due to their unique power systems, often require more sophisticated air filtration devices to protect the electronic equipment and battery systems from external pollutants. Traditional air conditioning system filters are prone to accumulating large amounts of dust and particulate matter over long-term use, leading to decreased filtration efficiency. This not only affects in-vehicle air quality but may also damage the vehicle's electronic systems. Furthermore, air quality directly impacts the incidence of respiratory diseases. Since traditional air filters typically require manual replacement, frequent filter changes are necessary under extreme conditions such as sandstorms and smog, increasing equipment costs. Their fixed structural configuration also limits their practicality, as it cannot be optimally adjusted to suit different operating environments. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a vehicle air filter self-cleaning system to overcome the problems of existing vehicle air filters requiring frequent replacement under extreme operating conditions and being unable to achieve self-cleaning.

[0004] To solve the above-mentioned technical problems, the present invention provides an on-board air filter self-cleaning system, including an electromagnetic reversing valve. The input end of the electromagnetic reversing valve is connected to the air outlet of the vehicle's original air compressor through a pneumatic triplet, and its output end is connected to the input ends of the on-board pneumatic system and the air filter self-cleaning system, respectively.

[0005] The air filter self-cleaning system includes an oil-gas filter, a speed control valve, and an air filter. The input end of the oil-gas filter is connected to the output end of the solenoid reversing valve. Its output end is connected in series with the speed control valve and the first check valve, and then connected to the output end of the air filter. The input end of the air filter is connected to an external air source, and its output end is connected to the input end of the air conditioning ventilation system.

[0006] In a preferred embodiment: the air filter self-cleaning system further includes a gas cylinder, the input end of which is connected to the output end of the oil-gas filter via a second one-way valve, and the output end of which is connected to the input end of the speed control valve via a switching valve.

[0007] In a preferred embodiment: the gas cylinder is a pressure vessel.

[0008] In a preferred embodiment: the switching valve is a pressure valve.

[0009] In a preferred embodiment, the pneumatic triplet includes an air filter, a pressure reducing valve, and an oil mist lubricator connected in series.

[0010] In a preferred embodiment, the system further includes an air conditioning ventilation fan, the input of which is connected to the output of an air filter device, and the output of which is connected to the input of an air conditioning ventilation system.

[0011] In a preferred embodiment, the opening of the air filter is adjustable.

[0012] In a preferred embodiment: the air filtration device includes a base, a filter device body disposed on the base, and lifting adjustment mechanisms symmetrically arranged on both sides of the body. The filter device body is rotatably connected to its upper cover plate. The upper cover plate rotates around its pivot point under the drive of the lifting adjustment mechanism, and pulls the opening on the side of the filter device body to extend along its rotation direction to adjust the size of the opening.

[0013] In a preferred embodiment: the upper cover plate, the filter device body, and the elastic sealing edges on both sides enclose each other to form an enclosed space for accommodating the elastic filter element, and the elastic filter element is movably pressed and embedded between the upper cover plate and the filter device body and is tightly fitted therewith.

[0014] In a preferred embodiment, the device further includes a dust sensor, comprising an internal dust sensor disposed inside the filter body and an external dust sensor disposed outside the filter body. The output of the dust sensor is connected to the input of a controller, and the output of the controller is connected to a lifting adjustment mechanism.

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

[0016] This invention provides a vehicle-mounted air filter self-cleaning system. This system automatically activates the filter cleaning function when the particulate content in the filtered air exceeds a set threshold or when the driver manually activates the system. Furthermore, the air filtration device within this system is designed and modified based on existing vehicle equipment, resulting in low cost. It features a compact structure, excellent sealing performance, and ease of installation and replacement, effectively reducing the labor costs associated with the later maintenance of the filtration system. Utilizing compressed air allows for relatively non-destructive cleaning of the filter element, enhancing its long-term filtration effectiveness and extending its service life. Attached Figure Description

[0017] Figure 1 A schematic diagram of the circuit of an existing vehicle-mounted pneumatic and ventilation system;

[0018] Figure 2 This is a system structure diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the preparation state before self-cleaning according to the present invention;

[0020] Figure 4 This is a schematic diagram of the self-cleaning state of the present invention;

[0021] Figure 5 This is a front view of the air filtration device of the present invention;

[0022] Figure 6 This is a side view of the air filtration device of the present invention;

[0023] Figure 7 This is an axial view of the air filtration device of the present invention;

[0024] Figure 8 The diagram shows the air filter opening adjusted to its minimum position.

[0025] Figure 9 The air filter opening is adjusted to its maximum position as shown in the diagram. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0029] refer to Figure 1As shown, the vehicle's pneumatic system and air conditioning ventilation system currently operate as two separate circuits. For the pneumatic system, compressor 101 compresses air from the atmosphere, which is then filtered by a pneumatic triplet 102 before being delivered to pneumatic actuators within the vehicle, such as the air suspension, pneumatic braking system, and door opening / closing system. The pneumatic triplet 102 includes an air filter, a pressure reducing valve, and an oil mist lubricator connected in series. For the air conditioning ventilation system, the air conditioning ventilation fan 110 forces air from the atmosphere into the air filter 108 and then into the vehicle's air conditioning ventilation system.

[0030] refer to Figure 2 As shown, this embodiment provides an on-board air filter self-cleaning system based on the existing on-board control system layout. The on-board air filter self-cleaning system includes an electromagnetic reversing valve 103. The input end of the electromagnetic reversing valve 103 is connected to the outlet end of the vehicle's original air compressor 101 via a pneumatic triplet 102. Its output end is connected to the input ends of both the on-board pneumatic system and the air filter self-cleaning system. The air filter self-cleaning system includes an oil-gas filter 104, a gas cylinder 105, a switching valve 106, a speed control valve 107, and an air filter device 108. The input end of the oil-gas filter 104 is connected to the output end of the electromagnetic reversing valve 103. Its output end is connected to the air inlet of the gas cylinder 105 and the input end of the switching valve 106 via a second one-way valve a2. The switching valve 106 is a pressure valve, and its output end is connected to the input end of the speed control valve 107. The speed control valve 107 is connected to the first one-way valve a1 and then to the output end of the air filter device 108. The air filter device 108 is self-cleaned by reverse pressure jet.

[0031] Specifically, the gas cylinder 105 described in this embodiment is an energy storage container capable of storing gas at a certain pressure, and its function is to output gas at a constant pressure during operation. The switching valve 106 is a pressure valve used to sense the gas pressure in the circuit; the valve can open instantaneously when the pressure in the pipe reaches a predetermined threshold. The speed regulating valve 107 is used to regulate the pressure and flow rate of the output gas. When the system receives a self-cleaning command, it first enters the pre-cleaning preparation stage, such as... Figure 3 As shown. The electromagnetic reversing valve 103 changes the flow path, sending pressurized gas from the pneumatic triplet 102 to the filter 104 to remove lubricating oil before entering the gas cylinder 105. This continues until the pressure in the gas cylinder 105 is balanced with the supply pressure of the vehicle's air conditioning compressor 101, ensuring the gas cylinder 105 has completed energy storage. Then, the electromagnetic reversing valve 103 switches back to its original position. Simultaneously, the opening angle of the air filter device 108 is adjusted to its maximum value. Figure 9 As shown. Self-cleaning mode as... Figure 4As shown, at that time, the switch valve 106 opens, and the compressed gas, after its flow rate and pressure are adjusted by the speed regulating valve 107, is sprayed into the inner side of the elastic filter element 226 of the air filter device 108, achieving self-cleaning through reverse pressure jet spraying. At the same time, the vibration motor 214 starts, which can further enhance its cleaning ability. After self-cleaning is completed, all valves and mechanical structures return to their initial state, and the vehicle pneumatic system and ventilation system re-enter the working state.

[0032] refer to Figure 5-7As shown, the air filtration device 108 comprises a base 225, a filter body 216 mounted on the base 225, and lifting and adjusting mechanisms symmetrically positioned on both sides of the body. The filter body 216 is rotatably connected to its upper cover 219. Driven by the lifting and adjusting mechanisms, the upper cover 219 rotates around its pivot point, pulling the opening on the side of the filter body 216 to extend along its rotation direction to adjust the opening size. From the perspective of structural components, the lifting and adjusting mechanism includes a side slide rail mounting bracket 201, a side driven slider 202, a side slide rail 203, a side driven slider coupling 204, a linkage shaft 205, a bearing seat 206, a driving slider coupling 207, a driving slider 208, a lead screw motor 209, an upper slide rail 221 fixed on the upper cover plate 219, a driven slider 220 slidably connected to the upper slide rail 221, a lead screw motor mounting bracket 222, and an elastic filter element 226 movably pressed between the upper cover plate 219 and the filter device body 216. The side slide rail mounting bracket 201, the filter device body 216, and the lead screw motor mounting bracket 222 are fixedly connected to the base 225 by welding. The lead screw motor 209 is bolted to the lead screw motor mounting bracket 222. The driving slider 208 is fitted into a pre-set groove within the lead screw motor 209. The side slide rail 203 is bolted to the side of the side slide rail mounting bracket 201. The driven slider 202 is fitted into a pre-set groove within the side slide rail 203. The driven slider 202 and the driving slider 208 are spatially aligned. The driven slider coupling 204 and the driving slider coupling 207 are bolted to the driven slider coupling 204 and the driving slider 208, respectively. The driven slider coupling 204 and the driving slider coupling 207 are connected by a linkage shaft 205. The upper slide rail 221 is bolted to the symmetrical centerline of the upper cover plate 219. The upper driven slider 220 is fitted into a pre-set groove in the upper slide rail 221. The bearing seat 206 is bolted to the upper driven slider 220 and also connected to the linkage shaft 205. The upper air nozzle 217 is bolted to the front of the upper cover plate 219, while maintaining a certain gap with the front end of the upper cover plate 219 to allow space for the installation of the elastic filter element 226. The upper cover plate 219 is hinged to the filter device body 216 at its rear end. The right air nozzle 210, lower air nozzle 212, and left air nozzle 213 are bolted to the right, lower, and left outer walls of the front end of the filter device body 216, respectively. The vibration motor 214 is bolted to the left outer wall of the filter device body 216.It should be noted that the air filtration device 108 also includes a dust sensor, comprising an internal dust sensor 215 disposed inside the filter body 216 and an external dust sensor 211 disposed outside the filter body 216. The output of the dust sensor is connected to the input of a controller, and the output of the controller is connected to a lifting adjustment mechanism. The external dust sensor 211 is bolted to the mounting base 225 via an external dust sensor mounting bracket 223, while the internal dust sensor 215 is bolted to the left inner wall of the filter body 216.

[0033] The top cover 219, the filter body 216, and the elastic sealing edges 224 on both sides together form an enclosed space that can accommodate the elastic filter element 226. Considering the airtightness of the enclosed space, the elastic sealing surfaces 224 are sealed with hot-melt adhesive to close the gaps on the left and right sides of the filter body 216 and the top cover 219. Alternatively, other integral elastic sealing components can be used to close the side gaps. Furthermore, the elastic filter element 226 consists of an elastic outer shell and an internal origami-shaped filter element. The outer contour of the origami-shaped filter element is also glued to the elastic outer shell using a hot-melt adhesive and installed on the front outer side of the filter body 216 and the top cover 219.

[0034] Working principle

[0035] When the lead screw motor 209 rotates at a certain angle, it will drive the active slider 208 to move a certain distance, thereby... Figure 5-7 The mechanical transmission shown drives the upper cover plate 219 to rotate a certain angle around the rear hinge position. The side driven slider 202 and the side slide rail 203 ensure the symmetry of force distribution during transmission, thereby ensuring the reliability of the structure during use. Since the elastic sealing surface 224 seals the gaps between the left and right sides of the filter device body 216 and the upper cover plate 219, and the elastic filter element 226 is installed on the outer side of the front part of the filter device body 216 and the upper cover plate 219, when the angle between the upper cover plate 219 and the horizontal plane increases, the elastic component 224 and the elastic filter element 226 will be stretched and retracted inward, thereby ensuring good sealing performance during operation.

[0036] When installing the elastic filter element 226, simply adjust the screw motor 209 to make the upper cover plate 219 form a negative angle with the horizontal plane. At this point, the size of the installation opening is smaller than the inner edge dimension of the elastic filter element 226, allowing the elastic filter element 226 to be easily installed on the upper cover plate 219 and the filter body 216. Then, adjusting the angle of the upper cover plate 219 easily achieves a pre-tight seal, ensuring reliable functionality while simplifying installation. The angle between the upper cover plate 219 and the horizontal plane is positively correlated with the angle of the folded filter element 226. The folding angle of the folded filter element affects its filtration effect and air exchange rate. A smaller angle results in a longer horizontal cross-sectional travel of air through the filter element, leading to better air filtration. However, for the same reason, the air exchange rate will be weakened. Figure 8 As shown. When the angle is larger, the horizontal cross-sectional path of the airflow through the filter element is shorter, resulting in a weaker filtration effect but a better air exchange rate, such as... Figure 9 As shown. Therefore, through the combined use of data from the external dust sensor 211 and the internal dust sensor 215, the opening size can be precisely and adaptively adjusted according to different environmental conditions and filter status during driving, achieving optimal matching with the conditions. When the external dust sensor 211 determines that the external environment is good, the filtration effect of air passing through the filter element during the long stroke is not much different from that during the short stroke, so the angle can be increased to reduce filtration resistance and increase the filtration area; when the external environment is harsh, the angle should be reduced to increase the filtration effect; at the same time, when the data difference between the external dust sensor 211 and the internal dust sensor 215 is less than a certain threshold (this threshold is a dynamic value that changes with the concentration of dust outside the vehicle), the control system determines that the filtration effect of the elastic filter element is poor, and further reduces the angle based on the original preset angle through a specific judgment function, or executes a self-cleaning command.

[0037] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A vehicle-mounted air filter self-cleaning system, characterized in that: Includes an electromagnetic reversing valve (103), the input end of which is connected to the outlet end of the vehicle's original air compressor (101) via a pneumatic triplet (102), and its output end is connected to the input ends of the vehicle's pneumatic system and the air filter self-cleaning system respectively. The air filter self-cleaning system includes an oil-gas filter (104), a speed control valve (107), and an air filter (108). The input end of the oil-gas filter (104) is connected to the output end of a solenoid directional valve (103). Its output end is connected in series with the speed control valve (107) and the first check valve (a1) and then connected to the output end of the air filter (108). The input end of the air filter (108) is connected to an external air source, and its output end is connected to the input end of an air conditioning ventilation system. The air filter self-cleaning system also includes a gas cylinder (105). The input end of the gas cylinder (105) is connected to the oil-gas filter (104) through a second check valve (a2). The output end of the air filter device (108) is connected to the input end of the speed control valve (107) through the switching valve (106); the opening of the air filter device (108) is adjustable; the air filter device (108) includes a base (225), a filter device body (216) arranged on the base (225) and lifting adjustment mechanisms symmetrical on both sides of the body. The filter device body (216) is rotatably connected to its upper cover plate (219). The upper cover plate (219) rotates around its pivot point under the drive of the lifting adjustment mechanism, and pulls the opening on the side of the filter device body (216) to extend along its rotation direction to adjust the opening size.

2. The vehicle air filter self-cleaning system according to claim 1, characterized in that: The gas cylinder (105) is a pressure vessel.

3. The vehicle-mounted air filter self-cleaning system according to claim 1, characterized in that: The switching valve (106) is a pressure valve.

4. The vehicle air filter self-cleaning system according to claim 1, characterized in that: The pneumatic triplet (102) includes an air filter, a pressure reducing valve, and an oil mist lubricator connected in series.

5. The vehicle-mounted air filter self-cleaning system according to claim 1, characterized in that: It also includes an air conditioning ventilation fan (110), the input end of which is connected to the output end of an air filter device (108), and the output end of which is connected to the input end of an air conditioning ventilation system.

6. The vehicle air filter self-cleaning system according to claim 1, characterized in that: The upper cover plate (219), the filter device body (216), and the elastic sealing edges (224) on both sides enclose each other to form an enclosed space for accommodating the elastic filter element (226). The elastic filter element (226) is movably pressed between the upper cover plate (219) and the filter device body (216) and fits tightly with them.

7. The vehicle air filter self-cleaning system according to claim 1, characterized in that: It also includes a dust sensor, which includes an inner dust sensor (215) disposed inside the filter body (216) and an outer dust sensor (211) disposed outside. The output end of the dust sensor is connected to the input end of the controller, and the output end of the controller is connected to the lifting adjustment mechanism.

Images