Air filtration system and method

Abstract

The invention discloses an air filtering system and method, and relates to the technical field of vehicle engineering.The air filtering system comprises an air inlet module, an air inlet flow control module, an air filtering module and a temperature detection module, and the air inlet module comprises a high-temperature air guiding pipe and a normal-temperature air guiding pipe; the normal-temperature air guide pipe is used for sucking normal-temperature air in the external environment; the high-temperature air guide pipe is used for sucking high-temperature air generated in an engine cabin; the air filtering module is used for filtering the mixed air; the filtered mixed air enters the engine; the temperature detection module is used for detecting the mixed air temperature of the mixed air; the air inlet flow control module is used for controlling the air flow proportion between the normal-temperature air and the high-temperature air sucked by the air inlet module according to the mixed air temperature so that the mixed air temperature can be within the standard temperature interval. The filtering effect of the air filtering module can be improved, the service life of the air filtering module can be prolonged, and the maintenance cost of the air filtering module is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engineering, and particularly to an air filtration system and method. Background Art

[0002] A fuel cell vehicle is a new energy vehicle with a hydrogen fuel cell as the core power source. It directly generates electrical energy through the electrochemical reaction of hydrogen and oxygen to drive an electric motor, achieving zero-emission or near-zero-emission operation.

[0003] The operation of a fuel cell engine in a fuel cell vehicle relies on the participation of air. To meet the requirement of delivering clean air to the fuel cell engine, an air filter is provided at the intake end of the fuel cell engine.

[0004] However, in the existing vehicle structure, there is a lack of intelligent adjustment of the intake air temperature. An excessively high or low intake air temperature will cause a reduction in the filtration performance and service life of the air filter, which not only affects the filtration ability of the air filter but also increases the maintenance cost of the air filter. Summary of the Invention

[0005] The present invention provides an air filtration system and method to solve the problem of reduced filtration performance and service life of the air filter due to excessively high or low intake air temperature.

[0006] According to one aspect of the present invention, an air filtration system is provided, which includes an intake module, an intake air flow control module, an air filtration module, and a temperature detection module. The intake module includes a high-temperature intake pipe and a normal-temperature intake pipe;

[0007] The normal-temperature intake pipe is connected to the external environment of the target vehicle and is used to inhale normal-temperature air in the external environment;

[0008] The high-temperature intake pipe is connected to the engine compartment of the target vehicle and is used to inhale high-temperature air generated in the engine compartment;

[0009] The intake end of the air filtration module is connected to the intake module and is used to filter the mixed air; the outlet end of the air filtration module is connected to the engine of the target vehicle, so that the filtered mixed air enters the engine; wherein, the mixed air is composed of the normal-temperature air and the high-temperature air;

[0010] The temperature detection module is arranged at the outlet end of the air filtration module and is used to detect the mixed air temperature of the mixed air;

[0011] The intake air flow control module is respectively connected to the intake module and the temperature detection module, and is used to control the air flow ratio between the normal temperature air and the high temperature air inhaled by the intake module according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range.

[0012] According to another aspect of the present invention, there is provided an air filtration method, which is executed by any one of the air filtration systems of the present invention. The method includes:

[0013] The normal temperature intake pipe inhales the normal temperature air in the external environment of the target vehicle;

[0014] The high temperature intake pipe inhales the high temperature air generated in the engine compartment of the target vehicle;

[0015] The air filtration module filters the mixed air so that the filtered mixed air enters the engine of the target vehicle; wherein, the mixed air is composed of the normal temperature air and the high temperature air;

[0016] The temperature detection module detects the mixed air temperature of the mixed air;

[0017] The intake air flow control module controls the air flow ratio between the normal temperature air and the high temperature air inhaled by the intake module according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range; wherein, the intake module includes the high temperature intake pipe and the normal temperature intake pipe.

[0018] By setting the temperature detection module and the intake air flow control module, the present invention detects the mixed air temperature of the mixed air through the temperature detection module, and, through the intake air flow control module, controls the air flow ratio between the normal temperature air and the high temperature air inhaled by the intake module according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range, achieving the effect of ensuring that the intake air temperature of the air filtration module is always within the standard temperature range. On the one hand, it can improve the filtration effect of the air filtration module, and on the other hand, it can extend the service life of the air filtration module and reduce the maintenance cost of the air filtration module.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of an air filtration system provided by an embodiment of the present invention;

[0022] Figure 2A is a schematic structural diagram of another air filtration system provided by an embodiment of the present invention;

[0023] Figure 2B is a three-dimensional schematic structural diagram of an air filtration system provided by an embodiment of the present invention;

[0024] Figure 3 is a flowchart of an air filtration method provided by an embodiment of the present invention. Detailed Embodiments

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that the terms "first", "second", "candidate", "target", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0027] Figure 1 is a schematic structural diagram of an air filtration system provided by an embodiment of the present invention, referring to Figure 1, the present invention provides an air filtration system, which includes an intake module 10, an intake air flow control module 11, an air filtration module 12 and a temperature detection module 13. The intake module 10 includes a high-temperature intake pipe 14 and a normal-temperature intake pipe 15;

[0028] The normal-temperature intake pipe 15 is connected to the external environment of the target vehicle and is used to inhale the normal-temperature air in the external environment;

[0029] The high-temperature intake pipe 14 is connected to the engine compartment of the target vehicle and is used to inhale the high-temperature air generated in the engine compartment;

[0030] The intake end of the air filtration module 12 is connected to the intake module 10 and is used to filter the mixed air; the outlet end of the air filtration module 12 is connected to the engine of the target vehicle, so that the filtered mixed air enters the engine; wherein, the mixed air is composed of normal-temperature air and high-temperature air;

[0031] The temperature detection module 13 is arranged at the outlet end of the air filtration module 12 and is used to detect the mixed air temperature of the mixed air;

[0032] The intake air flow control module 11 is respectively connected to the intake module 10 and the temperature detection module 13 and is used to control the air flow ratio between the normal-temperature air and the high-temperature air inhaled by the intake module 10 according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range.

[0033] Optionally, the normal-temperature intake pipe 15 is made of corrosion-resistant metal or polymer material and is hermetically connected to the external environment (such as the chassis, etc.) of the target vehicle through a flange or a snap structure to ensure airtightness. The external interface of the normal-temperature intake pipe 15 is designed as a bellows or a telescopic pipe to adapt to the installation requirements of different vehicle models. During the driving of the target vehicle, the negative pressure principle or an auxiliary fan is used to drive and inhale the normal-temperature air in the external environment. A dust-proof filter screen is arranged at the inlet of the normal-temperature intake pipe 15 to filter particulate matter and protect the cleanliness of the internal system. The normal-temperature air refers to the air at the natural environmental temperature, that is, the air that has not been heated or cooled. The target vehicle can be any vehicle equipped with an engine, such as a traditional fuel-powered vehicle, a gasoline / diesel engine car, a truck, etc.; or a new energy vehicle, a fuel cell vehicle, etc. The specific vehicle model of the target vehicle is not limited in this embodiment.

[0034] The high-temperature intake pipe 14 is manufactured by using a high-temperature resistant composite material, such as fluororesin or silicone rubber, etc. Its pipe body is designed as a multi-layer structure, including:

[0035] 1. An inner high-temperature resistant coating, which is used to prevent thermal damage of the high-temperature air. 2. A heat insulation intermediate layer, which uses materials such as ceramic fiber or aerogel, etc., and is used to reduce the heat transfer to the external environment. 3. An outer protective layer, which uses wear-resistant and corrosion-resistant polyurethane or metal braided mesh, etc.

[0036] The high-temperature air intake pipe 14 is hermetically connected to the exhaust port of the engine compartment of the target vehicle through a flange or a clamp interface, etc., to ensure that high-temperature air is introduced without leakage. During the operation of the engine of the target vehicle, the high-temperature air intake pipe 14 directs the high-temperature air generated in the engine compartment out. The temperature range of the high-temperature air includes, but is not limited to, the range of 150°C - 400°C.

[0037] The air filtration module 12 includes functions of particulate filtration and impurity gas adsorption, and is composed of a filter element, an adsorption element, and upper and lower shells. The air filtration module 12 is rigidly connected or hermetically docked to the outlet end of the intake module 10 through the intake end to form a continuous air flow path. The intake module 10 is responsible for the preliminary collection and guidance of the mixed air, and the air filtration module 12 undertakes the core filtration function.

[0038] The air filtration module 12 adopts a multi-stage filtration mechanism: 1. Primary filtration: intercept large particulate pollutants, and use a metal mesh, a cyclone separator or a centrifugal structure to reduce the subsequent filtration load. 2. Secondary fine filtration: for fine particles such as PM2.5 and oil mist, use an electrostatically charged filter medium or a fiber filter element. 3. Chemical adsorption: integrate an activated carbon layer or a photocatalytic module to remove gaseous pollutants such as odors and VOCs.

[0039] The outlet end of the air filtration module 12 is directly connected to the intake system of the engine of the target vehicle, and is used to convey the filtered mixed air to the engine. The mixed air includes two air sources: normal-temperature air from the external environment and high-temperature air from the interior of the engine compartment of the target vehicle. The engine operates using the filtered mixed air.

[0040] The temperature detection module 13 can use a thermistor or a thermocouple as the core sensor, and is adapted to the working conditions of fast air flow and wide temperature change range. Preferably, the temperature detection module 13 can be equipped with an infrared temperature measurement device to achieve non-contact measurement and avoid the influence of air flow disturbance on the detection accuracy.

[0041] The normal-temperature air intake pipe 15 and the high-temperature air intake pipe 14 are respectively equipped with electrically adjustable air flow valves, and the precise ratio of the flow rates of the high-temperature air and the normal-temperature air can be achieved by adjusting the opening degrees of the air flow valves.

[0042] The temperature detection module 13 converts the temperature of the mixed air into an electrical signal and inputs it to the intake air flow control module 11. The intake air flow control module 11 analyzes the electrical signal to determine the temperature of the mixed air. The intake air flow control module 11 determines the first opening degree of the air flow valve of the high-temperature air intake pipe 14 and the second opening degree of the air flow valve of the normal-temperature air intake pipe 15 according to the temperature of the mixed air.

[0043] Further, the intake air flow control module 11 sends a first control instruction to the air flow valve of the high-temperature intake pipe 14 to control the air flow valve of the high-temperature intake pipe 14 to be in a first opening degree, and sends a second control instruction to the air flow valve of the normal-temperature intake pipe 15 to control the air flow valve of the normal-temperature intake pipe 15 to be in a second opening degree.

[0044] The high-temperature intake pipe 14 sucks in high-temperature air when the air flow valve is in the first opening degree, while the normal-temperature intake pipe 15 sucks in normal-temperature air when the air flow valve is in the second opening degree, so that the temperature of the mixed air is within the standard temperature range.

[0045] The standard temperature range refers to the temperature range that can ensure the best filtration effect and service life of the air filtration module 12, and the standard temperature range can be set according to actual experience.

[0046] In the embodiment of the present invention, by setting the temperature detection module and the intake air flow control module, the temperature of the mixed air is detected by the temperature detection module, and the air flow ratio between the normal-temperature air and the high-temperature air inhaled by the intake module is controlled by the intake air flow control module according to the temperature of the mixed air, so that the temperature of the mixed air is within the standard temperature range, achieving the effect of ensuring that the intake air temperature of the air filtration module is always within the standard temperature range. On the one hand, the filtration effect of the air filtration module can be improved, and on the other hand, the service life of the air filtration module can be extended, and the maintenance cost of the air filtration module can be reduced.

[0047] Figure 2A It is a schematic structural diagram of another air filtration system provided by the embodiment of the present invention. Refer to Figure 2A Based on the air filtration system provided in the previous embodiment, the embodiment of the present invention is further refined.

[0048] Optionally, the air filtration system further includes an air mixing module 20, and the air mixing module 20 is respectively connected to the intake module 10 and the intake end of the air filtration module 12;

[0049] The air mixing module 20 is used for swirling and mixing the normal-temperature air and the high-temperature air to obtain mixed air, and injecting the mixed air into the intake end of the air filtration module 12.

[0050] Among them, the air mixing module 20 includes a double-channel air inlet, a swirl generator and a mixing cavity. The double-channel air inlet receives the normal-temperature air and the high-temperature air respectively, and adopts an independent channel design to prevent pre-mixing. The swirl generator is internally provided with spiral guide vanes or a volute structure, and two airflows are driven to form a rotating jet through centrifugal force to achieve swirl mixing. The mixing cavity is a conical or cylindrical cavity, and the airflow rotation is accelerated through a tapered section to ensure the uniformity of the temperature distribution.

[0051] The mixed air passes through the rectifying grille at the tail of the air mixing module 20 to eliminate eddy currents and is transported to the filtering module 12 in a laminar flow state.

[0052] By setting up the air mixing module, the beneficial effects are as follows:

[0053] On the first hand, through the swirl mixing technology, the normal-temperature air and the high-temperature air are fully integrated, which can eliminate local temperature fluctuations and make the air flow temperature entering the air filtering module more uniform.

[0054] On the second hand, the swirl structure can automatically adjust the mixing ratio according to the external environmental temperature to ensure the stable intake air temperature of the air filtering module and avoid system shutdown caused by sudden changes in working conditions.

[0055] On the third hand, the turbulent effect generated by swirl mixing can promote the premature sedimentation of large particulate impurities in the air and reduce the pollutant load directly entering the air filtering module.

[0056] Optionally, the air filtering system further includes an air heating module 21, and the air heating module 21 is respectively connected to the intake ends of the air mixing module 20 and the air filtering module 12;

[0057] The air mixing module 20 is also used to inject the mixed air into the air heating module 21;

[0058] The air heating module 21 is used to heat the mixed air and inject the heated mixed air into the intake end of the air filtering module 12.

[0059] Among them, the air heating module 21 heats the mixed air by means of electric heating, hydrothermal or exhaust heat pipe exchange preheating. The air heating module 21 is internally provided with a deflector and a temperature sensor to ensure uniform heating of the air flow and temperature control accuracy.

[0060] By setting up the air heating module, the beneficial effects are as follows:

[0061] On the first hand, the heated mixed air can reduce the dew condensation problem of the air filtering module caused by low temperature, avoid filter material blockage, and extend the service life of the air filtering module.

[0062] On the second hand, the heated mixed air can inactivate some microorganisms in the air filtering module, reduce the biological pollution of the air filtering module, and improve the filtering effect of the air filtering module.

[0063] [[ID=…]] On the third hand, the mixed air is heated and then injected into the intake end of the air filtering module, which can pre-lift the air temperature and reduce the energy consumption demand of the subsequent heating link.

[0064] Optionally, the air heating module 21 is connected to the temperature detection module 13;

[0065] The air heating module 21 is also used to adjust the heating power according to the temperature of the mixed air, so that the temperature of the mixed air is within the standard temperature range.

[0066] Among them, the air heating module 21 is directly connected to the temperature detection module 13 through an electrical signal interface or a data bus. The temperature detection module 13 collects the temperature data of the mixed air in real time and transmits it to the control unit of the heating module. The air heating module 21 is built with a power adjustment unit, and the control unit controls the power adjustment unit to dynamically adjust the heating power according to the received temperature of the mixed air, ensuring that the temperature of the mixed air is stably within the preset standard temperature range.

[0067] By setting the air heating module to adjust the heating power according to the temperature of the mixed air, so that the temperature of the mixed air is within the standard temperature range, the beneficial effects are as follows:

[0068] On the first hand, according to the deviation between the real-time temperature and the standard temperature range, the heating power is automatically adjusted, avoiding temperature overshoot or insufficiency caused by the traditional fixed power mode.

[0069] On the second hand, the power adjustment is triggered only when the temperature of the mixed air deviates from the standard temperature range, reducing the ineffective heating energy consumption.

[0070] On the third hand, by dynamically adjusting the heating power, the rapid aging of components caused by traditional full-power heating is avoided.

[0071] On the fourth hand, when the external environmental temperature fluctuates, the system automatically compensates the heating power, maintains a constant output, and reduces the frequency of manual intervention.

[0072] Figure 2B It is a three-dimensional structure schematic diagram of an air filtration system provided by an embodiment of the present invention, as Figure 2B shown, including an intake air flow control module 11, an air filtration module 12, a temperature detection module 13, a high-temperature air intake pipe 14, a normal-temperature air intake pipe 15, an air mixing module 20, and an air heating module 21.

[0073] Optionally, the air filtration system further includes a humidity detection module 22 and a dehumidification module 23 arranged at the intake end of the air filtration module 12, and the humidity detection module 22 and the dehumidification module 23 are connected;

[0074] The humidity detection module 22 is used to detect the humidity of the mixed air of the mixed air;

[0075] The dehumidification module 23 is used to dehumidify the mixed air according to the humidity of the mixed air, so that the humidity of the mixed air is within the standard humidity range.

[0076] Among them, the humidity detection module 22 is integrated at the air inlet end of the air filtration module 12, and the humidity of the mixed air is monitored in real time through a sensor, such as a capacitive, resistive or condensation principle-based humidity sensor.

[0077] The dehumidification module 23 is linked with the humidity detection module 22, and dehumidifies the mixed air according to the detected humidity of the mixed air to ensure that the humidity of the mixed air is within the standard humidity range. Among them, the dehumidification operation includes, but is not limited to, at least one of compression cooling dehumidification, adsorption dehumidification and temperature adjustment dehumidification. The standard humidity range refers to the humidity range that can ensure the best filtration effect and service life of the air filtration module 12, and the standard humidity range can be set according to actual experience.

[0078] When the humidity detection module 22 determines that the humidity of the mixed air exceeds the standard humidity range, it triggers the dehumidification module 23 to start dehumidifying the mixed air.

[0079] By setting the humidity detection module and the dehumidification module at the air inlet end of the air filtration module, the beneficial effects are as follows:

[0080] On the one hand, by monitoring the humidity of the mixed air in real time through the humidity detection module and combining with the dehumidification operation of the dehumidification module, it is ensured that the humidity of the mixed air is always within the standard humidity range. On the one hand, the filtration effect of the air filtration module can be improved, and on the other hand, the service life of the air filtration module can be extended, and the maintenance cost of the air filtration module can be reduced.

[0081] On the second hand, the dehumidification module is started only when it is detected that the humidity of the mixed air exceeds the standard humidity range, avoiding energy waste.

[0082] On the third hand, pre-treating the humidity of the mixed air can reduce the risk of oxidation and corrosion of metal components by high-humidity air and improve the overall durability of the system.

[0083] Optionally, the air filtration system further includes a pressure difference detection module 24, and the pressure difference detection module 24 is connected to the dehumidification module 23;

[0084] The pressure difference detection module 24 is used to detect the pressure difference between the air inlet end and the air outlet end of the dehumidification module 23, and generate a dehumidification module maintenance reminder message when the pressure difference is greater than the pressure difference threshold.

[0085] Among them, the pressure difference detection module 24 is deployed at the air inlet end and the air outlet end of the dehumidification module 23, and the absolute difference between the pressure values at both ends is calculated in real time through the embedded controller as the pressure difference. Compare the pressure difference with the preset pressure difference threshold. If the pressure difference is greater than the pressure difference threshold, it is determined that the dehumidification module 23 is in an abnormal condition, and then a dehumidification module maintenance reminder message is generated and sent through the human-machine interface or the Internet of Things platform.

[0086] By setting up a pressure difference detection module to detect the pressure difference between the air inlet end and the air outlet end of the dehumidification module, and generating a dehumidification module maintenance reminder message when the pressure difference is greater than the pressure difference threshold, the beneficial effects are as follows:

[0087] Firstly, it avoids the reduction of dehumidification efficiency caused by the performance attenuation of the dehumidification module, and ensures the dehumidification effect on the mixed air.

[0088] Secondly, it supports dynamically adjusting the pressure difference threshold according to the environmental conditions, and avoids false alarms or missed detections caused by a fixed threshold.

[0089] Embodiment III

[0090] Figure 3 is a flowchart of an air filtration method provided by an embodiment of the present invention. Refer to Figure 3 , this air filtration method can be executed by any of the above air filtration systems, and this air filtration method includes:

[0091] S301. The normal temperature air intake pipe inhales the normal temperature air in the external environment of the target vehicle.

[0092] S302. The high temperature air intake pipe inhales the high temperature air generated in the engine compartment of the target vehicle.

[0093] S303. The air filtration module filters the mixed air so that the filtered mixed air enters the engine of the target vehicle.

[0094] Among them, the mixed air is composed of normal temperature air and high temperature air.

[0095] S304. The temperature detection module detects the mixed air temperature of the mixed air.

[0096] S305. The intake air flow control module controls the air flow ratio between the normal temperature air and the high temperature air inhaled by the intake module according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range.

[0097] Among them, the intake module includes a high temperature air intake pipe and a normal temperature air intake pipe.

[0098] In one embodiment, the intake air flow control module determines the lower limit value and the upper limit value of the temperature range within the standard temperature range. The magnitude relationship between the mixed air temperature and the lower limit value and the upper limit value of the temperature range is determined. If it is determined that the mixed air temperature is less than or equal to the lower limit value of the temperature range, the opening degree of the air flow valve of the high-temperature air intake pipe is controlled to be greater than the opening degree of the air flow valve of the normal-temperature air intake pipe, so as to increase the mixed air temperature and make the mixed air temperature fall within the standard temperature range. If it is determined that the mixed air temperature is greater than or equal to the upper limit value of the temperature range, the opening degree of the air flow valve of the high-temperature air intake pipe is controlled to be less than the opening degree of the air flow valve of the normal-temperature air intake pipe, so as to decrease the mixed air temperature and make the mixed air temperature fall within the standard temperature range.

[0099] In an embodiment of the present invention, normal-temperature air in the external environment of the target vehicle is inhaled through the normal-temperature air intake pipe; high-temperature air generated in the engine compartment of the target vehicle is inhaled through the high-temperature air intake pipe; the air filtration module filters the mixed air, so that the filtered mixed air enters the engine of the target vehicle. Among them, the mixed air is composed of normal-temperature air and high-temperature air; the temperature detection module detects the mixed air temperature of the mixed air; the intake air flow control module controls the air flow ratio between the normal-temperature air and the high-temperature air inhaled by the intake module according to the mixed air temperature, so that the mixed air temperature falls within the standard temperature range, achieving the effect of ensuring that the intake air temperature of the air filtration module always falls within the standard temperature range. On the one hand, the filtration effect of the air filtration module can be improved, on the other hand, the service life of the air filtration module can be extended, and the maintenance cost of the air filtration module can be reduced.

[0100] Optionally, the intake air flow control module controls the air flow ratio between the normal-temperature air and the high-temperature air inhaled by the intake module according to the mixed air temperature, including:

[0101] S3051. Determine the lower limit value and the upper limit value of the temperature range within the standard temperature range.

[0102] S3052. When the mixed air temperature is less than or equal to the lower limit value of the temperature range, control the air flow valve of the high-temperature air intake pipe to be at the maximum opening degree, and control the air flow valve of the normal-temperature air intake pipe to be at the minimum opening degree.

[0103] S3053. When the mixed air temperature is greater than or equal to the upper limit value of the temperature range, control the air flow valve of the high-temperature air intake pipe to be at the minimum opening degree, and control the air flow valve of the normal-temperature air intake pipe to be at the maximum opening degree.

[0104] Exemplarily, assume that the lower limit value of the temperature range within the standard temperature range is T1, the upper limit value of the temperature range is T2, and assume that the mixed air temperature is T0.

[0105] If T0 ≤ T1, control the air flow valve of the high-temperature intake pipe to the maximum opening, such as controlling the opening of the air flow valve of the high-temperature intake pipe to 100%; and, control the air flow valve of the normal-temperature intake pipe to the minimum opening, such as controlling the air flow valve of the normal-temperature intake pipe to 0.

[0106] If T0 ≥ T2, control the air flow valve of the high-temperature intake pipe to the minimum opening, such as controlling the opening of the air flow valve of the high-temperature intake pipe to 0; and, control the air flow valve of the normal-temperature intake pipe to the maximum opening, such as controlling the air flow valve of the normal-temperature intake pipe to 100%.

[0107] By determining the lower limit value and the upper limit value of the temperature range of the standard temperature range; when the mixed air temperature is less than or equal to the lower limit value of the temperature range, control the air flow valve of the high-temperature intake pipe to the maximum opening, and control the air flow valve of the normal-temperature intake pipe to the minimum opening; when the mixed air temperature is greater than or equal to the upper limit value of the temperature range, control the air flow valve of the high-temperature intake pipe to the minimum opening, and control the air flow valve of the normal-temperature intake pipe to the maximum opening, the beneficial effects are as follows:

[0108] First, when the mixed air temperature is close to the critical value, through the extreme opening adjustment (maximum / minimum opening), the ratio of high-temperature / normal-temperature air flow can be quickly switched to avoid the temperature continuously deviating from the target range.

[0109] Second, by adopting the double threshold value control, a certain range of normal fluctuations can be tolerated, reducing the system oscillation caused by the frequent operation of the air flow valve.

[0110] Third, based on the binary threshold control of the upper and lower limits, no complex algorithm is required, reducing the development difficulty and maintenance cost of the intake air flow control module.

[0111] Optionally, it further includes:

[0112] A1. When the mixed air temperature is greater than the lower limit value of the temperature range, or less than the upper limit value of the temperature range, determine at least one standard temperature sub-range included in the standard temperature range, and the candidate first opening and the candidate second opening respectively associated with each standard temperature sub-range.

[0113] Among them, the standard temperature range is pre-divided into at least one standard temperature sub-range. For example, assuming the standard temperature range is 20°C - 70°C, then the standard temperature range is divided into three standard temperature sub-ranges: 20°C - 40°C, 40°C - 60°C, and 60°C - 70°C.

[0114] Moreover, corresponding candidate first opening degrees and candidate second opening degrees are preset for each standard temperature sub-interval. The candidate first opening degree is the opening degree of the air flow valve of the high-temperature air intake pipe, and the candidate second opening degree is the opening degree of the air flow valve of the normal-temperature air intake pipe. In other words, when the mixed air temperature is in any standard temperature sub-interval, controlling the air flow valve of the high-temperature air intake pipe with the candidate first opening degree corresponding to this standard temperature sub-interval, and controlling the air flow valve of the normal-temperature air intake pipe with the candidate second opening degree corresponding to this standard temperature sub-interval can make the mixed air temperature more standard.

[0115] B1. Determine a target first opening degree from the candidate first opening degrees and a target second opening degree from the candidate second opening degrees according to the matching result between the mixed air temperature and each standard temperature sub-interval.

[0116] Exemplarily, assume that the mixed air temperature is 50 °C and any standard temperature sub-interval is 40 °C - 60 °C, then the mixed air temperature matches this standard temperature sub-interval. Assume that the candidate first opening degree corresponding to this standard temperature sub-interval is 40%, and the corresponding candidate first opening degree is 60%, then determine that the target first opening degree is 40% and the target second opening degree is 60%.

[0117] C1. Control the air flow valve of the high-temperature air intake pipe to be the target first opening degree and control the air flow valve of the normal-temperature air intake pipe to be the target second opening degree.

[0118] Exemplarily, assume that the target first opening degree is 40% and the target second opening degree is 60%, then control the air flow valve of the high-temperature air intake pipe to be 40% and control the air flow valve of the normal-temperature air intake pipe to be 60%.

[0119] By determining at least one standard temperature sub-interval included in the standard temperature interval and the candidate first opening degrees and candidate second opening degrees respectively associated with each standard temperature sub-interval when the mixed air temperature is greater than the lower limit value of the temperature interval or less than the upper limit value of the temperature interval; determining a target first opening degree from the candidate first opening degrees and a target second opening degree from the candidate second opening degrees according to the matching result between the mixed air temperature and each standard temperature sub-interval; and controlling the air flow valve of the high-temperature air intake pipe to be the target first opening degree and controlling the air flow valve of the normal-temperature air intake pipe to be the target second opening degree, the beneficial effects are as follows:

[0120] First, by matching the mixed air temperature with the standard temperature sub-interval and dynamically adjusting the air flow valve in combination with the candidate opening degrees, real-time temperature feedback and adaptive adjustment can be achieved.

[0121] Second, by dynamically matching the optimal opening degree combination, the output of ineffective air flow is reduced, and energy waste is avoided.

[0122] Thirdly, by separately controlling the air flow valves of the high-temperature and normal-temperature air intake pipes, the mixing ratio of different temperature air sources can be flexibly allocated according to actual needs.

[0123] Optionally, it further includes:

[0124] A2. The air heating module determines the lower limit value of the temperature range of the standard temperature range.

[0125] B2. When the temperature of the mixed air is less than or equal to the lower limit value of the temperature range, the air heating module heats the temperature of the mixed air at the first heating power.

[0126] C2. When the temperature of the mixed air is greater than the lower limit value of the temperature range, the air heating module heats the temperature of the mixed air at the second heating power.

[0127] Among them, the first heating power is greater than the second heating power.

[0128] Exemplarily, assume that the lower limit value of the temperature range of the standard temperature range is T1, the upper limit value of the temperature range is T2, and assume that the temperature of the mixed air is T0.

[0129] If T0 ≤ T1, then heat the temperature of the mixed air at the first heating power, for example, heat the temperature of the mixed air at 100% heating power.

[0130] If T0 ≥ T2, then heat the temperature of the mixed air at the second heating power, for example, heat the temperature of the mixed air at 0 heating power, that is, turn off the heating function.

[0131] The air heating module determines the lower limit value of the temperature range of the standard temperature range; when the temperature of the mixed air is less than or equal to the lower limit value of the temperature range, the air heating module heats the temperature of the mixed air at the first heating power; when the temperature of the mixed air is greater than the lower limit value of the temperature range, the air heating module heats the temperature of the mixed air at the second heating power; among them, the first heating power is greater than the second heating power, and the beneficial effects are as follows:

[0132] Firstly, when the temperature of the mixed air is less than or equal to the lower limit value of the temperature range, a high power (the first heating power) is used to quickly raise the temperature, and after exceeding the lower limit value of the temperature range, it switches to a low power (the second heating power) to maintain the temperature, reducing the energy waste of continuous high-power operation.

[0133] Secondly, by controlling the power distribution through the lower limit value of the temperature range, it avoids the problems of repeated start-stop or overheating caused by temperature fluctuations in the traditional single-power mode.

[0134] In a third aspect, after rapid high-power heating in the low-temperature stage, switching to low-power operation can reduce the continuous high-temperature load on the heating element and slow down the material aging rate.

[0135] Optionally, it further includes:

[0136] The humidity detection module detects the humidity of the mixed air; the dehumidification module dehumidifies the mixed air according to the humidity of the mixed air so that the humidity of the mixed air is within the standard humidity range.

[0137] In one implementation, the humidity detection module detects the humidity of the mixed air. If it is determined that the humidity of the mixed air exceeds the humidity control threshold, the dehumidification module dehumidifies the mixed air according to the humidity of the mixed air so that the humidity of the mixed air is within the standard humidity range. For example, assuming the standard humidity range is 40%-60% and the humidity of the mixed air is 75%, the dehumidification module dehumidifies the mixed air so that the humidity of the mixed air is within 40%-60%.

[0138] By detecting the humidity of the mixed air through the humidity detection module; the dehumidification module dehumidifies the mixed air according to the humidity of the mixed air so that the humidity of the mixed air is within the standard humidity range, ensuring that the humidity of the mixed air is always within the standard humidity range. On the one hand, it can improve the filtering effect of the air filtration module, and on the other hand, it can extend the service life of the air filtration module and reduce the maintenance cost of the air filtration module.

[0139] It should be understood that various forms of the processes shown above can be used, reordering, adding or deleting steps. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0140] The above specific implementation manners do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air filtration system, characterized in that, It includes an intake module, an intake air flow control module, an air filtration module, and a temperature detection module. The intake module includes a high-temperature intake pipe and a normal-temperature intake pipe; The normal-temperature intake pipe is connected to the external environment of the target vehicle and is used to inhale the normal-temperature air in the external environment; The high-temperature intake pipe is connected to the engine compartment of the target vehicle and is used to inhale the high-temperature air generated in the engine compartment; The intake end of the air filtration module is connected to the intake module and is used to filter the mixed air; the outlet end of the air filtration module is connected to the engine of the target vehicle, so that the filtered mixed air enters the engine; wherein, the mixed air is composed of the normal-temperature air and the high-temperature air; The temperature detection module is arranged at the outlet end of the air filtration module and is used to detect the mixed air temperature of the mixed air; The intake air flow control module is respectively connected to the intake module and the temperature detection module and is used to control the air flow ratio between the normal-temperature air and the high-temperature air inhaled by the intake module according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range.

2. The air filtration system according to claim 1, wherein It further includes an air mixing module, and the air mixing module is respectively connected to the intake module and the intake end of the air filtration module; The air mixing module is used to perform swirl mixing on the normal-temperature air and the high-temperature air to obtain the mixed air and inject the mixed air into the intake end of the air filtration module.

3. The air filtration system according to claim 2, wherein It further includes an air heating module, and the air heating module is respectively connected to the air mixing module and the intake end of the air filtration module; The air mixing module is further used to inject the mixed air into the air heating module; The air heating module is used to heat the mixed air and inject the heated mixed air into the intake end of the air filtration module.

4. The air filtration system according to claim 3, characterized in that, The air heating module is connected to the temperature detection module; The air heating module is further used to adjust the heating power according to the mixed air temperature, so that the mixed air temperature is within the standard temperature range.

5. The air filtration system according to claim 3, characterized in that, It further includes a humidity detection module and a dehumidification module arranged at the intake end of the air filtration module, and the humidity detection module is connected to the dehumidification module; The humidity detection module is used to detect the mixed air humidity of the mixed air; The dehumidification module is used to dehumidify the mixed air according to the mixed air humidity, so that the mixed air humidity is within the standard humidity range.

6. The air filtration system according to claim 5, characterized in that, It further includes a pressure difference detection module, and the pressure difference detection module is connected to the dehumidification module; The pressure difference detection module is used to detect the pressure difference between the intake end and the outlet end of the dehumidification module, and generate a dehumidification module maintenance reminder message when the pressure difference is greater than the pressure difference threshold.

7. An air filtration method, characterized in that, Executed by the air filtration system according to any one of claims 1-6, the method includes: The normal-temperature intake pipe inhales the normal-temperature air in the external environment of the target vehicle; The high-temperature intake pipe inhales the high-temperature air generated in the engine compartment of the target vehicle; The air filtration module filters the mixed air so that the filtered mixed air enters the engine of the target vehicle; wherein, the mixed air is composed of the normal temperature air and the high temperature air. The temperature detection module detects the temperature of the mixed air. The intake air flow control module controls the air flow ratio between the normal temperature air and the high temperature air inhaled by the intake module according to the temperature of the mixed air, so that the temperature of the mixed air is within the standard temperature range; wherein, the intake module includes the high temperature intake pipe and the normal temperature intake pipe.

8. The method according to claim 7, wherein The intake air flow control module controls the air flow ratio between the normal temperature air and the high temperature air inhaled by the intake module according to the temperature of the mixed air, including: Determining the lower limit value and the upper limit value of the temperature range of the standard temperature range. When the temperature of the mixed air is less than or equal to the lower limit value of the temperature range, controlling the air flow valve of the high temperature intake pipe to be at the maximum opening degree, and controlling the air flow valve of the normal temperature intake pipe to be at the minimum opening degree. When the temperature of the mixed air is greater than or equal to the upper limit value of the temperature range, controlling the air flow valve of the high temperature intake pipe to be at the minimum opening degree, and controlling the air flow valve of the normal temperature intake pipe to be at the maximum opening degree.

9. The method according to claim 8, further comprising: When the temperature of the mixed air is greater than the lower limit value of the temperature range, or less than the upper limit value of the temperature range, determining at least one standard temperature sub-range included in the standard temperature range, and candidate first opening degrees and candidate second opening degrees respectively associated with each of the standard temperature sub-ranges; wherein, the candidate first opening degree is the opening degree of the air flow valve of the high temperature intake pipe, and the candidate second opening degree is the opening degree of the air flow valve of the normal temperature intake pipe. According to the matching result between the temperature of the mixed air and each of the standard temperature sub-ranges, determining a target first opening degree from the candidate first opening degrees, and determining a target second opening degree from the candidate second opening degrees. Controlling the air flow valve of the high temperature intake pipe to be the target first opening degree, and controlling the air flow valve of the normal temperature intake pipe to be the target second opening degree.

10. The method according to claim 7, further comprising: The air heating module determines the lower limit value of the temperature range of the standard temperature range. When the temperature of the mixed air is less than or equal to the lower limit value of the temperature range, the air heating module heats the temperature of the mixed air at a first heating power. When the temperature of the mixed air is greater than the lower limit value of the temperature range, the air heating module heats the temperature of the mixed air at a second heating power; wherein, the first heating power is greater than the second heating power.

11. The method according to claim 7, further comprising: The humidity detection module detects the humidity of the mixed air. The dehumidification module dehumidifies the mixed air according to the humidity of the mixed air, so that the humidity of the mixed air is within the standard humidity range.

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