An air intake filtration system, air intake filtration control, and control valve calibration method

Abstract

The application provides an air intake filtering system, an air intake filtering control and a control valve calibration method, relates to the technical field of equipment air intake filtering, and the air intake filtering system comprises at least one filtering device connected in parallel, a pressurizing device, a post-pressurizing air path, a gas storage device, a control unit, a bypass air path and a bypass control valve arranged in the bypass air path; each filtering device is in communication with the pressurizing device through an on-off air path, the pressurizing device is communicated with an air intake filtering system outlet through the post-pressurizing air path; the bypass air path is connected between the post-pressurizing air path and the gas storage device, so that excess gas in the post-pressurizing air path is stored in the gas storage device through the bypass air path; the gas storage device is in communication with each filtering device through an on-off air path, and is used for back flushing and dust removal of the corresponding filtering device; at least the problem that clean gas is provided as a pulse back flushing gas source to realize efficient cleaning of an air filter without additionally adding a pressurizing device is solved.

Description

Technical Field

[0001] This application relates to the field of equipment air intake filtration technology, and in particular to an air intake filtration system, air intake filtration control, and control valve calibration method. Background Technology

[0002] Air filters are core protective components in the intake systems of internal combustion engines, air compressors, fans, and other equipment. Their core function is to precisely filter dust, particulate matter, and other impurities from the intake air, creating a clean intake environment for downstream equipment and ensuring its efficient and stable operation. The core value of air filters lies in protecting high-value main equipment with a low-cost filter element investment. The filtration accuracy and lifespan of air filters directly affect the operational reliability, overall economic efficiency, and environmental compliance of the equipment, making them an indispensable first line of defense for commercial vehicles, industrial machinery, and other equipment. In high-dust environments such as mines and construction sites, air filters face even more stringent challenges: in addition to meeting basic filtration and protection requirements, they must also have an online self-cleaning function to prevent rapid clogging of the filter element by large amounts of dust, ensuring low-resistance operation and continuous air supply in the intake system, ultimately reducing equipment maintenance costs. Currently, the mainstream self-cleaning method in the industry is pulse backflushing. However, the inventors discovered that the pulsed air used for backflushing, taken from the air filter outlet gas, directly interferes with the stability of the air filter pressure drop and the continuity of intake air, thus significantly affecting the diesel engine's charging efficiency, power output, fuel economy, emission standards, and operational reliability. Insufficient pulse pressure can quickly lead to problems such as cleaning failure, filter element clogging, and insufficient intake air volume, and in severe cases, can cause irreversible damage such as turbocharger wear and fuel injection system malfunctions. Therefore, how to provide clean gas with suitable pressure and temperature as the pulsed backflushing air source without adding an additional turbocharger, to achieve efficient cleaning of the air filter, has become a problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides an air intake filtration system, an air intake filtration control system, and a control valve calibration method, in order to at least solve the problem of providing clean gas as a pulse backflushing air source to achieve efficient cleaning of the air filter without the need for additional pressurization devices.

[0004] In a first aspect, embodiments of this application provide an intake air filtration system, comprising: at least one filter device, a pressurizing device, a pressurized air passage, an air storage device, a control unit, a bypass air passage, and a bypass control valve disposed in the bypass air passage; Each filtration unit is connected to the booster unit via an on / off air path to control whether the booster unit obtains clean gas from the corresponding filtration unit. Each filtration unit is used to filter and output clean gas from the outside of the intake filtration system when connected to the booster unit. The booster is connected to the outlet of the intake air filter system through a boosted air passage, so that the gas boosted by the booster is output from the outlet of the intake air filter system through the boosted air passage; The inlet of the bypass gas path is connected to the pressurized gas path, and the outlet of the bypass gas path is connected to the gas storage device, so that when the bypass control valve is turned on, the gas is diverted from the pressurized gas path and stored in the gas storage device; the gas storage device is connected to each filter device by a gas path that can be turned on and off, so as to control whether the gas storage device back-flushes the corresponding filter device for dust removal. The control unit is used to control the opening and closing of the air passage between each filtration device, the booster device, and the gas storage device, as well as to obtain the real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system. Based on the real-time operating conditions, it controls the opening of the bypass control valve so as to divert gas from the boosted air passage to the gas storage device while keeping the overall performance of the downstream air-consuming equipment from deteriorating.

[0005] The phrase "no deterioration of the overall index" refers to the overall index of the downstream gas-using equipment after the bypass control valve is turned on not being worse than that of the downstream gas-using equipment before the bypass control valve is turned on. Different downstream gas-using equipment can determine their corresponding overall index based on their own performance parameters. The overall index may involve one or more performance parameters. A method to determine whether the overall index has deteriorated is that the value of one or more performance parameters involved in the overall index when the bypass control valve is turned on is better than or equal to the value of one or more performance parameters involved in the overall index when the bypass control valve is turned off. Alternatively, a method to determine whether the overall index has deteriorated can be that the weighted sum of the values ​​of one or more performance parameters involved in the overall index when the bypass control valve is turned on is better than or equal to the weighted sum of the values ​​of one or more performance parameters involved in the overall index when the bypass control valve is turned off is performed in the same way. The term "better than" here refers to specific performance parameters or weighted summations, and can be greater than or less than. For example, regarding exhaust emissions, the statement that the exhaust emissions are better than or equal to the values ​​when the bypass control valve is open should be understood as meaning that the exhaust emissions are less than or equal to the values ​​when the bypass control valve is closed. Similarly, regarding power performance (e.g., torque), the statement that the power performance is better than or equal to the values ​​when the bypass control valve is closed should be understood as meaning that the power performance is greater than or equal to the values ​​when the bypass control valve is closed. The comprehensive index may include positive indicators (such as power, torque, thermal efficiency, mileage, etc.) or negative indicators (such as fuel consumption, emissions, noise, wear, etc.). For positive indicators, "better than or equal to" specifically means "greater than or equal to", and for negative indicators, "better than or equal to" specifically means "less than or equal to". When weighted summing, positive indicators use positive coefficients and negative indicators use negative coefficients. When comparing weighted sum values, "better than or equal to" should generally mean "greater than or equal to".

[0006] For example, taking an engine as an example, the comprehensive indicators include: power performance (e.g., torque), economy (e.g., fuel consumption), and / or emissions (e.g., the content of nitrogen oxides, carbon monoxide, and particulate matter in the exhaust gas), etc. However, the embodiments of this application are not limited to these, and any indicator used to compare the operating performance of downstream gas-using equipment falls within the protection scope of this application. As a specific embodiment, when determining whether the comprehensive indicator has deteriorated, the power performance, economy, and / or emissions indicators can be weighted and summed to obtain a weighted indicator. The weighted indicator under the bypass control valve on condition is compared to the weighted indicator under the bypass control valve off condition. If the weighted indicator under the bypass control valve on condition is greater than or equal to the weighted indicator under the bypass control valve off condition, then the corresponding comprehensive indicator has not deteriorated; otherwise, the corresponding comprehensive indicator has deteriorated.

[0007] In this embodiment, the supercharging device functions to provide pressurized gas to downstream air-consuming equipment of the intake air filtration system, such as a turbocharger in an engine system. In a system with a supercharging device, the amount of pressurized gas output may exceed the amount of gas required by the downstream air-consuming equipment to maintain constant operating conditions; that is, there may be an excess of pressurized gas output by the supercharging device. Utilizing this characteristic, when there is an excess of pressurized gas output by the supercharging device, the excess gas is stored in a gas storage device, providing the gas storage device with a certain pressure (because the gas used for backflushing and dust removal of the filtration device needs to meet certain requirements). The pressurization device uses clean gas (filtered by the filtration device) within a certain pressure range as the backflushing gas for dust removal. Therefore, the pressurization device also provides a certain pressure and an excess of gas relative to downstream air-consuming equipment to the gas storage device, thereby fully utilizing the gas drawn into the intake filtration system. Thus, for systems that already have a pressurization device, improvements to the intake filtration system structure based on this application eliminate the need to add an additional pressurization device or air pump to the gas storage device. The pressurization device in existing systems with built-in pressurization devices can be reused, making it easier and cheaper to upgrade existing systems with less modification. The embodiments of this application are suitable for operation in high-dust environments, and can stably obtain a backflushing gas source that meets the requirements without the need for additional pressurization devices. During the gas storage process in the gas storage device, or when there are multiple filtration devices, the multiple filtration devices can serve as backups for each other. During the cleaning process of the intake filtration system with multiple filtration devices, it does not affect the power output, fuel economy and emission compliance of downstream gas-using equipment. It can realize the online self-cleaning function of the air filter and significantly reduce the frequency of equipment downtime maintenance and the overall operation and maintenance cost.

[0008] The function of the gas storage device is to collect gas with the pressure and / or temperature required for backflushing dust removal during the period when a usable filtration device is available and during the period when the excess gas (already clean gas) output by the pressurization device is used for backflushing dust removal when a filtration device is required.

[0009] The bypass control valve's function is to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of downstream gas-using equipment. It's important to note that the bypass control valve only opens when excess gas is present to store it in the storage device. For example, even if the pressurization unit is outputting pressurized gas, if the output volume is less than or equal to the minimum required output volume at the outlet of the inlet filtration system, gas will not be diverted to the storage device to avoid degrading the overall performance of downstream gas-using equipment. Thus, the combination of the bypass control valve and the storage device achieves a zero-storage effect. When a filtration unit requires dust removal, the storage device centrally provides purge gas to that filtration unit for backflushing dust removal, achieving a complete gas extraction effect. In other words, by combining the bypass control valve with the excess gas obtained after filtration and pressurization from the pressurization unit and supplying it to the storage device, the storage device centrally outputs dust removal gas when dust removal is needed, achieving a zero-storage and complete gas extraction effect within the storage device. Therefore, during the normal intake filtration of the intake filtration system, the gas storage device can pre-store the gas required for dust removal, and when dust removal is needed, the gas in the gas storage device can be directly used for dust removal.

[0010] For an air intake filtration system with only one filter, although downstream air-consuming equipment still needs to be shut down during the dust removal process of that single filter, the system stores air in the storage device during the filtration process, ensuring readily available dust-collecting gas when needed. Dust removal can begin immediately without the need for additional preparation of dust-collecting gas, thus shortening downtime. For an air intake filtration system with multiple filters, these filters can be divided into filtration and standby states. When a filter in the current filtration state needs dust removal, the standby filter is activated first to continue supplying air to the pressurization unit. The air path between the filter requiring dust removal and the pressurization unit is then blocked, and dust removal is initiated. The filter after dust removal is then configured as a standby unit, thus eliminating the need for downstream air-consuming equipment to be shut down and maintaining the continuous and stable operation of the entire air-consuming system. Moreover, in an air intake filtration system with multiple filtration devices, during the dust removal process, since there are other available filtration devices continuously filtering the intake air, the gas storage device can still obtain excess gas from the pressurized air path. If the gas pressure in the gas storage device drops significantly, the gas storage device can obtain supplementary gas during the dust removal process to ensure that the gas storage device can complete the dust removal operation.

[0011] The intake air filtration system in this application includes, but is not limited to, gasoline engine systems, diesel engine systems, etc. However, the embodiments of this application are not limited to these. Any system that filters intake air to provide clean gas for downstream air-consuming equipment falls within the protection scope of this application. Accordingly, downstream air-consuming equipment includes, but is not limited to, gasoline engines or generators, diesel engines or generators, (industrial) vacuum cleaners, fresh air systems and other air purification equipment, gas engines, etc.

[0012] The embodiments of this application have the following technical effects: the combination of a filtration device, a pressurizing device, a pressurized gas path, a bypass control valve, and a gas storage device enables the gas storage device to obtain gas with a certain pressure after the pressurizing device provides pressurized gas to the downstream gas-using equipment, so as to meet the pressure required for backflushing dust removal gas. Furthermore, by providing a bypass control valve, excess gas can be diverted to the gas storage device by controlling the opening of the bypass control valve, thereby providing a gas source for the gas storage device without affecting the operating conditions of the downstream gas-using equipment. When dust removal is required, if there is only one filtration device in the inlet filtration system, the downtime of the downstream gas-using equipment can be shortened; if there are multiple filtration devices, the downstream gas-using equipment can be kept running without stopping, maintaining the continuous and stable operation of the overall system. Based on this system, automatic dust removal of the filtration device can be realized, and it can be used in high-dust environments. For systems that already have a booster, the existing system can be improved at a lower cost to achieve the embodiments of this application, reducing system upgrade costs. Without the need to install an additional booster, a stable pulse backflushing air source that meets the requirements can be obtained. The cleaning process does not affect the engine's power output, fuel economy, or emission compliance. It can achieve the online self-cleaning function of the air filter and significantly reduce the frequency of equipment downtime maintenance and overall operation and maintenance costs.

[0013] Preferably, the intake filtration system further includes: a cooling device connected in series with the pressurized air path; and a bypass air path connected to the pressurized air path at the outlet side of the cooling device to guide gas from the outlet side of the cooling device to the air storage device. Excess gas is diverted from the outlet side of the cooling device to the air storage device, thereby ensuring that the gas entering the air storage device meets the required pressure and temperature, guaranteeing that backflushing dust removal will not damage the filtration device due to excessively high gas temperature at any time, thus enabling smooth dust removal. Furthermore, the temperature of the gas entering the air storage device is relatively low, resulting in minimal pressure loss after the gas cools to room temperature.

[0014] As one specific embodiment, the filtration device includes a first filtration device and a second filtration device; The first filtration device and the booster device are connected by an on / off air passage. For example, the first filtration device and the booster device are connected through a first air intake control valve to control whether the booster device obtains clean gas from the first filtration device. The second filtration device and the booster device are connected by an on / off air passage. For example, the second filtration device and the booster device are connected through a second air intake control valve to control whether the booster device obtains clean gas from the second filtration device. The booster is connected to the outlet of the intake air filtration system through the boosted air path, and the cooling device is connected in series in the boosted air path so that the gas boosted by the booster is cooled by the cooling device and then output through the outlet of the intake air filtration system. The bypass gas path is connected to the pressurized gas path on the outlet side of the cooling device to draw gas to the gas storage device during the bypass control valve being open; The gas storage device and the first filter device are connected by an on / off air passage. For example, the gas storage device and the first filter device are connected through a first dust removal control valve to control whether the gas storage device back-flushes the first filter device for dust removal. The gas storage device and the second filter device are connected by an on / off air passage. For example, the gas storage device and the second filter device are connected by a second dust removal control valve to control whether the gas storage device backflushes the second filter device for dust removal.

[0015] The embodiments of this application have the following technical effects: Two filtration devices (a first filtration device and a second filtration device) can serve as backups for each other. When one is in filtration mode, the other is in standby mode. During dust removal by the filtration device in its current filtration mode, the standby filtration device is first connected to the gas path supplying the downstream air-consuming equipment as the new filtration device. Then, the original filtration device is disconnected from the gas path supplying the downstream air-consuming equipment, ensuring a continuous air supply to the downstream air-consuming equipment and improving system stability. The gas storage device draws excess gas from the outlet side of the cooling device via a bypass. The gas entering the gas storage device meets both the pressure and temperature requirements for backflushing dust removal, ensuring that the filtration device is not damaged during backflushing dust removal.

[0016] Furthermore, it also includes a dust collection bag connected to each filter unit. The filtered dust and impurities are collected in the dust collection bag to prevent secondary pollution to the environment.

[0017] Furthermore, the control unit includes: An initialization module is used to configure at least one of the filters to filter mode and the rest to standby mode when the intake filtration system is started. Optionally, at startup, some filter devices capable of operating in the filtration state can be configured in the filtration state, while the remaining filter devices capable of operating in the filtration state can be configured in the standby state. Optionally, the filter devices in the filtration state and the standby state can be allocated in equal proportions. Optionally, when the time required for dust removal by the filter device is greater than the time that the filter device can continuously perform normal filtration, the number of filter devices configured in the standby state can be greater than the number of filter devices configured in the filtration state. For example, if there are three filter devices, and filter device 1 needs dust removal, filter device 2, which is on standby, can be configured in the filtration state, and filter device 1 can be configured in the dust-awaiting state and start dust removal. When filter device 2 also needs dust removal, filter device 1 has not yet completed dust removal. At this time, filter device 3 can be configured in the filtration state, and filter device 2 can be configured in the dust-awaiting state. Before filter device 3 needs dust removal, filter device 1 completes dust removal and is configured in the standby state, and dust removal continues for filter device 2, and so on. The number of standby filter units should be greater than the number of filter units in the filtering state, based on the difference between the time required for dust removal and the time during which the filter unit can continuously filter normally.

[0018] The gas storage control module is used to acquire the gas parameters at the inlet of the bypass gas path, determine whether the gas parameters meet the preset gas storage conditions, and control the bypass control valve to close if the gas parameters do not meet the preset gas storage conditions. Otherwise, it acquires the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system and controls the opening of the bypass control valve according to the real-time operating conditions, so as to divert gas from the pressurized gas path to the gas storage device while keeping the comprehensive indicators of the downstream gas-using equipment from deteriorating. The filter status monitoring module is used to acquire the operating parameters of the filter device for each filter status during the operation of the intake filter system, determine whether the operating parameters meet the corresponding preset dust removal conditions of the filter device, and if the operating parameters meet the preset dust removal conditions, the filter device is selected as the first target filter device and the backup control module is triggered. The backup control module is used to check whether there is a backup filter device. If a backup filter device is detected, one filter device is selected from all the backup filter devices as the second target filter device, and the second target filter device is configured to filter. The pre-dust removal control module is used to configure the first target filter device to be ready for dust removal after the backup control module has been executed. The preset dust removal conditions for each filtration unit serve as the basis for determining whether dust removal is required. These preset dust removal conditions can be constructed based on parameters provided by the filtration unit manufacturer that indicate its performance. When a filtration unit in filtration mode requires dust removal, it is first determined whether a standby filtration unit is available. If a standby filtration unit is available, it is configured as the filtration unit, and the filtration unit requiring dust removal is configured as the dust-pending unit. This ensures that the number of filtration units working in conjunction with the booster unit remains constant, maintaining air intake stability and thus ensuring the stable operation of downstream air-consuming equipment. If no standby filtration unit is available, the filtration unit requiring dust removal is directly configured as the dust-pending unit, and the remaining filtration units still in filtration mode continue to supply air to downstream air-consuming equipment. For an air intake system with only one filter, when the filter needs dust removal, the downstream air-consuming equipment will shut down. However, since the air storage device has already stored air during the normal filtration period of the filter, the filter can be immediately configured to be ready for dust removal and backflushing can be performed without waiting for the backflushing gas to be prepared, which can shorten the downtime.

[0019] The dust removal control module is used to check whether there are filter devices in the dust removal state. When a filter device in the dust removal state is detected, the air storage device is controlled to back-flush all filter devices in the dust removal state and configure the filter devices in the dust removal state that have completed the dust removal as standby. The configuration for the filtration state includes controlling the corresponding filtration device to disconnect the air path from the air storage device and to connect the air path from the pressurization device, and marking the status of the corresponding filtration device as filtration state; the configuration for the standby state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as standby state; the configuration for the dust removal state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as dust removal state.

[0020] The embodiments of this application have the following technical effects: During the air intake filtration system's supply of air to downstream air-consuming equipment, excess gas in the pressurized air path is used as a gas source to supply the gas storage device. By controlling the opening of the bypass control valve, only the excess gas is diverted, ensuring the normal supply of gas required by the current operating conditions of the downstream air-consuming equipment without affecting its normal operation. When there are two or more filtration devices, and they are allocated to a partial filtration state and a remaining standby state, it is possible to ensure that there is always a usable filtration device operating in filtration mode, guaranteeing the continuous and stable operation of the downstream air-consuming equipment. For an air intake system with only one filtration device, when that filtration device needs dust removal, the downstream air-consuming equipment will shut down. However, since the gas storage device has already stored gas during the normal filtration period of the filtration device, the filtration device can be immediately configured to a dust removal standby state for backflushing dust removal without the need for additional waiting time to prepare backflushing dust removal gas, thus shortening the downtime. During the period when clean pressurized gas flows through the pressurized gas path, if the gas pressure of the gas storage device is too low during the backflushing dust removal process, the excess gas in the pressurized gas path can be used to replenish the gas storage device while it is backflushing dust removal for other filtration devices.

[0021] Optionally, the control unit further includes a filter replenishment module, used to determine whether the number of filter devices in the filter state is less than a preset filter quantity, and whether there are filter devices in the standby state. If it is determined that the number of filter devices in the filter state is less than the preset filter quantity and there are filter devices in the standby state, then a first number of standby filter devices are configured to be in the filter state; the first number is the smaller value between the preset filter quantity and the difference between the number of filter devices in the filter state and the number of filter devices in the standby state. This ensures that the number of filter devices in the filter state in the intake air filter system is always the preset filter quantity, maintaining the stability of the intake system.

[0022] Specifically, each filtration unit is pre-configured with a corresponding dust removal differential pressure threshold and a cleanliness baseline differential pressure, both of which can be obtained from the manufacturer's factory parameters. When the inlet and outlet differential pressure of the filtration unit is greater than or equal to the corresponding dust removal differential pressure threshold, the filtration unit requires dust removal; otherwise, dust removal is not required. For filtration units during the dust removal process, if their inlet and outlet differential pressure is less than or equal to the corresponding cleanliness baseline differential pressure, then the filtration unit has completed dust removal.

[0023] In an intake filter system with or without a cooling device in the pressurized air path, when the bypass air path diverts excess gas in the pressurized air path, the gas parameters at the inlet of the bypass air path may include: the inlet pressure of the bypass air path; the preset gas storage conditions may include: the inlet pressure is greater than or equal to the gas storage pressure of the gas storage device and the inlet pressure is within the preset gas storage pressure range. The gas storage device needs to obtain clean gas and at least meet a certain pressure for backflushing dust removal. The inlet pressure must be greater than or equal to the storage pressure of the gas storage device to ensure that after the bypass control valve is opened, excess gas can flow from the pressurized gas path to the gas storage device. Furthermore, the inlet pressure of the bypass gas path must be within the preset storage pressure range to ensure that the gas pressure in the storage device meets the requirements for backflushing dust removal. Too low a storage pressure will not achieve the desired dust removal effect, while too high a storage pressure can easily damage the filter device. The preset storage pressure range can be obtained from the factory parameters of each filter device manufacturer. For example, typically, the upper limit of the preset storage pressure range is less than 100 kPa.

[0024] In an air intake filtration system with a cooling device connected in series in the pressurized air path, when excess gas is diverted to the outlet side of the cooling device in the bypass air path, the gas parameters at the inlet of the bypass air path can include: the inlet pressure and inlet temperature of the bypass air path; preset gas storage conditions include: the inlet pressure is greater than or equal to the gas storage pressure of the gas storage device and the inlet pressure is within the preset gas storage pressure range, and the inlet temperature is less than or equal to a preset temperature threshold; the preset temperature threshold can be the minimum allowable temperature of the backflushing dust removal gas obtained from the manufacturer's parameters of each filtration device, to ensure that the temperature of the gas stored in the gas storage device for backflushing dust removal is suitable for all filtration devices. For example, the preset temperature threshold is typically less than or equal to 50 degrees Celsius.

[0025] In this process, excess gas is diverted from the outlet side of the cooling device to the gas storage device, which allows the gas entering the gas storage device to meet the required pressure and temperature, ensuring that dust removal can be completed without damaging the filter device at any time when backflushing dust removal is triggered.

[0026] The operating parameters of the filtration device include: the inlet and outlet pressure difference of the corresponding filtration device; the inlet and outlet pressure difference of the filtration device is the difference between the gas pressure at the outlet and the gas pressure at the inlet of the filtration device. When the permeability of the filtration device is relatively good, the difference between the two is small. When a lot of dust and impurities are adsorbed, blockage occurs, resulting in a significant increase in the outlet and inlet pressure difference.

[0027] Preset dust removal conditions include: the inlet and outlet pressure difference of the corresponding filter device is greater than or equal to the corresponding dust removal pressure difference threshold; the dust removal pressure difference threshold is a parameter provided by the filter device manufacturer. If the inlet and outlet pressure difference is greater than or equal to the corresponding dust removal pressure difference threshold, it means that dust removal is required; otherwise, it can continue to be used for filtration.

[0028] The gas storage status of the gas storage device includes: the gas storage pressure of the gas storage device; Preset dust removal conditions may include: the gas storage pressure is within a preset gas storage pressure range; if the gas storage pressure is within a preset gas storage pressure range, it means that the pressure of the gas stored in the gas storage device is suitable for backflushing dust removal of the filter device.

[0029] Preferably, for the intake air filtration system, especially for the intake air filtration system without a cooling device or with a bypass air path connected between the pressurization device and the cooling device, the gas storage temperature in the gas storage device can also be obtained, and the preset dust removal conditions can include: the gas storage pressure is within a preset gas storage pressure range and the gas storage temperature is less than or equal to a preset temperature threshold; thereby ensuring that backflushing dust removal is only started when the gas storage pressure and gas storage temperature in the gas storage device meet the requirements of the filter device for backflushing dust removal.

[0030] As a specific embodiment, when there is only one filter device in the air intake filtration system, when the system starts, the filter device is configured to filter state and continuously filters the intake air. During this continuous filtration, gas flows to the downstream air-consuming equipment at the bypass gas inlet. When the gas parameters meet the preset gas storage conditions, the gas storage device will store gas. After running for a period of time, when the operating parameters of the filter device meet the corresponding preset dust removal conditions, since there are no other filter devices, the filter device is configured to be in a dust removal standby state (at this time, the downstream air-consuming equipment needs to be shut down because there is no gas supply). The gas storage device has already stored gas during the normal filtration intake period. At this time, the preset dust removal conditions are met, so the gas storage device can be controlled to backflush the filter device for dust removal. After the backflushing dust removal is completed, the filter device is configured to standby state. Since there is only one filter device in the system, when the downstream air-consuming equipment is started, the filter device needs to be configured to filter state.

[0031] As a specific embodiment, when the air intake filtration system has two filtration devices, both the first and second filtration devices are initially clean and usable. Assuming the first filtration device is currently configured for filtration and the second filtration device is configured for standby, during the operation of the first filtration device, the air storage device will utilize the excess air in the pressurized air path for storage. When the first filtration device needs dust removal, the second filtration device is first configured for filtration, and then the first filtration device is configured for dust removal. During the period when the second filtration device supplies air to the pressurization device, the air storage device performs backflushing dust removal on the first filtration device. After dust removal, the first filtration device is configured for standby until the second filtration device needs dust removal, at which point the first filtration device is configured for filtration again, and the second filtration device is configured for dust removal. Repeating the above process ensures the continuous and stable operation of downstream air-consuming equipment. In this embodiment, since there is always a usable filtration device to provide clean air to the pressurization device, if the air storage pressure of the air storage device is too low during the dust removal process, the bypass control valve can be opened to replenish the air storage device while ensuring that the working condition of the downstream air-using equipment does not deteriorate.

[0032] This application embodiment achieves primary and backup intake filtration by providing a first filter device and a second filter device, thereby ensuring a continuous air supply to the turbocharger even when one of the filter devices is undergoing dust removal, maintaining the normal operating condition of the entire system. Since excess gas is obtained from downstream of the turbocharger as the air source for the air storage device, the cleaning process does not affect the engine's power output, fuel economy, or emission compliance. This achieves both online self-cleaning of the air filter and significantly reduces the frequency of equipment downtime for maintenance and overall operating costs.

[0033] For air intake filtration systems with more than two filtration units, the above explanation can be used as a reference.

[0034] Preferably, the gas storage control module is specifically used for: Obtain the gas parameters at the inlet of the bypass gas path and determine whether the gas parameters meet the preset gas storage conditions; If it is determined that the gas parameters do not meet the preset gas storage conditions, the bypass control valve is shut off. Otherwise, the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system are obtained. Based on the real-time operating conditions, the valve opening value corresponding to the real-time operating conditions is matched from the preset valve opening calibration data, and the opening of the bypass control valve is controlled to be the valve opening value, so as to divert gas from the pressurized gas path to the gas storage device. Among them, the valve opening calibration data pre-calibrates multiple sets of operating condition data and corresponding valve opening values, so that after the opening value of the bypass control valve is set to the corresponding valve opening value, the comprehensive indicators of the downstream gas-using equipment can be kept from deteriorating.

[0035] Establishing valve opening calibration data requires pre-setting multiple sets of operating condition data (possible for downstream gas-using equipment) in the valve opening calibration data. Through actual measurement, the opening of the bypass control valve is adjusted to find the maximum opening value of the bypass control valve while maintaining the overall performance of the downstream gas-using equipment without deterioration. This maximum opening value is then used to calibrate the valve opening value corresponding to the operating condition data in the valve opening calibration data. In this embodiment, known data is pre-set. The opening of the corresponding bypass control valve is determined based on the operating condition data using the pre-calibrated valve opening calibration data, rather than directly determining whether there is excessive air intake in real time. This reduces the number of sensors in the system during operation, such as eliminating the need to install a flow meter at the outlet of the air intake filter system.

[0036] Preferably, the dust removal control module is specifically used for: Check if there are any filter devices in a dust removal state. If any filter devices in a dust removal state are found, obtain the air storage status of the air storage device for each filter device in a dust removal state, and determine whether the air storage status meets the preset dust removal conditions. If the air storage status meets the preset dust removal conditions, control the air storage device to back-flush the filter device in a dust removal state, and configure the filter device in a dust removal state that has completed dust removal as a standby state.

[0037] To prevent the gas pressure in the gas storage device from dropping too quickly or being excessively diverted, resulting in insufficient pressure for backflushing dust removal when reaching the filter, when there are multiple filter devices in a dust removal state, each device needs to be connected to the gas storage device one by one for backflushing dust removal. During this process, if the gas storage device's pressure is insufficient, the preset dust removal conditions will not be met. In this case, the gas path between the gas storage device and the currently connected filter device will be blocked. The gas storage device will automatically replenish gas when the preset gas storage conditions are met, and will reconnect the filter device to continue backflushing dust removal after the preset dust removal conditions are met.

[0038] Specifically, controlling the gas storage device to backflush the filter device for dust removal includes: controlling the filter device in the dust removal state to disconnect the gas path from the pressurization device and connect it to the gas storage device. Specifically, the filter device in the dust removal standby state is configured as such after dust removal is completed. This includes configuring the filter device in the dust removal standby state until the inlet and outlet pressure difference of the filter device in the dust removal standby state is less than or equal to the corresponding cleanliness reference pressure difference. The cleanliness reference pressure difference of the filter device is a factory parameter provided by the filter device manufacturer. A pressure difference between the inlet and outlet that is less than or equal to this cleanliness reference pressure difference indicates that the filter device is clean and usable.

[0039] During backflushing dust removal, the air storage device and the filter device can be continuously connected for continuous backflushing until dust removal is completed. Preferably, the specific method of backflushing dust removal is pulse backflushing dust removal, which involves briefly opening and then immediately closing the air path between the air storage device and the filter device to automatically remove dust accumulated on the surface of the filter element using a short-term high-pressure reverse airflow. The duration of the short connection is in milliseconds. Pulse backflushing dust removal can be performed once or multiple times until dust removal of the filter device is completed. Using the gas in the air storage device to perform pulse backflushing dust removal on the filter device in the dust removal state improves dust removal efficiency and quality. Specifically, for Figure 1The air intake filtration system shown can be configured to either briefly open and immediately close the first dust removal control valve via a control unit, causing the gas in the gas storage device to backflush the first filter device for pulse backflushing dust removal. Alternatively, the system can also be configured to briefly open and immediately close the second dust removal control valve via a control unit, causing the gas in the gas storage device to backflush the second filter device for pulse backflushing dust removal. During backflushing dust removal, the backflushing gas can be used to backflush the filter device through either the air outlet or the dust removal port.

[0040] Secondly, embodiments of this application provide an intake filter control method, employed by the aforementioned intake filter system, comprising: When the intake filtration system is started, at least one of the filtration devices is configured to filtration mode, and the remaining filtration devices are configured to standby mode. The gas parameters at the inlet of the bypass gas path are obtained, and it is determined whether the gas parameters meet the preset gas storage conditions. If it is determined that the gas parameters do not meet the preset gas storage conditions, the bypass control valve is controlled to close. Otherwise, the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system are obtained, and the opening of the bypass control valve is controlled according to the real-time operating conditions. In order to maintain the overall performance of the downstream gas-using equipment without deterioration, the gas is diverted from the pressurized gas path to the gas storage device. During the operation of the air intake filtration system, for each filtration state, the operating parameters of the filtration device are obtained, and it is determined whether the operating parameters meet the corresponding preset dust removal conditions of the filtration device. If the operating parameters meet the preset dust removal conditions, the filter device is selected as the first target filter device, and it is checked whether there is a standby filter device. If a filter device is found to be in standby mode, select one filter device from all the standby filter devices as the second target filter device and configure the second target filter device to filter mode. Configure the first target filtration device to be ready for dust removal; Check if there are any filter devices in a state of needing dust removal. If any filter devices in a state of needing dust removal are found, control the air storage device to back-flush all filter devices in a state of needing dust removal, and configure the filter devices in a state of needing dust removal that have completed dust removal as standby. The configuration for the filtration state includes controlling the corresponding filtration device to disconnect the air path from the air storage device and to connect the air path from the pressurization device, and marking the status of the corresponding filtration device as filtration state; the configuration for the standby state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as standby state; the configuration for the dust removal state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as dust removal state.

[0041] The embodiments of this application have the following technical effects: the combination of a filtration device, a pressurizing device, a pressurized gas path, a bypass control valve, and a gas storage device enables the gas storage device to obtain gas with a certain pressure after the pressurizing device provides pressurized gas to the downstream gas-using equipment, so as to meet the pressure required for backflushing dust removal gas. Furthermore, by providing a bypass control valve, excess gas can be diverted to the gas storage device by controlling the opening of the bypass control valve, thereby providing a gas source for the gas storage device without affecting the operating conditions of the downstream gas-using equipment. When dust removal is required, if there is only one filtration device in the inlet filtration system, the downtime of the downstream gas-using equipment can be shortened; if there are multiple filtration devices, the downstream gas-using equipment can be kept running without stopping, maintaining the continuous and stable operation of the overall system. Based on this system, automatic dust removal of the filtration device can be realized, and it can be used in high-dust environments. For systems that already have a booster, the existing system can be improved at a lower cost to achieve the embodiments of this application, reducing system upgrade costs. Without the need to install an additional booster, a stable pulse backflushing air source that meets the requirements can be obtained. The cleaning process does not affect the engine's power output, fuel economy, or emission compliance. It can achieve the online self-cleaning function of the air filter and significantly reduce the frequency of equipment downtime maintenance and overall operation and maintenance costs.

[0042] Preferably, the real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system are obtained, and the opening of the bypass control valve is controlled according to the real-time operating conditions. This is done to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of the downstream air-consuming equipment, specifically including: The system obtains the real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system, matches the valve opening value corresponding to the real-time operating conditions from the preset valve opening calibration data, and controls the opening of the bypass control valve to the valve opening value so as to divert gas from the pressurized air path to the gas storage device. Among them, the valve opening calibration data pre-calibrates multiple sets of operating condition data and corresponding valve opening values, so that after the opening value of the bypass control valve is set to the corresponding valve opening value, the comprehensive indicators of the downstream gas-using equipment can be kept from deteriorating.

[0043] Preferably, the gas storage device is controlled to perform backflushing dust removal on all filter devices in the dust removal state, specifically including: For each filter device in the dust removal state, the gas storage state of the gas storage device is obtained, and it is determined whether the gas storage state meets the preset dust removal conditions. If it is determined that the gas storage state meets the preset dust removal conditions, the gas storage device is controlled to back-flush the filter device in the dust removal state.

[0044] Controlling the air storage device to backflush the filter device for dust removal includes: disconnecting the air path between the filter device and the pressurization device, and connecting the filter device to the air storage device. Specifically, configuring the filter device in the dust-removal-waiting state as a standby state after dust removal is completed includes configuring the filter device in the dust-removal-waiting state as a standby state when the inlet and outlet pressure difference of the filter device in the dust-removal-waiting state is less than or equal to the corresponding clean reference pressure difference.

[0045] The embodiments of this application are method-type embodiments that correspond one-to-one with the control units in the aforementioned intake air filtration system embodiments. The embodiments of this application can be understood by referring to the aforementioned intake air filtration system embodiments, and will not be repeated here.

[0046] Thirdly, embodiments of this application provide a bypass control valve calibration method for calibrating an intake air filtration system as described above, including: For each set of operating condition data in the valve opening calibration data, the bypass control valve is shut off, the operating condition of the downstream air-consuming equipment of the intake air filter system is configured according to the operating condition data, and the current comprehensive index of the downstream air-consuming equipment is obtained and recorded as the initial index. Real-time acquisition of the intake air volume of downstream gas-consuming equipment and the inlet pressure of the bypass gas path; Under the condition that the preset opening calibration is met, the opening of the bypass control valve is controlled to determine the optimal opening. When the intake air volume is excessive, it means that the current intake air volume is too high and exceeds the intake air volume required for the downstream gas-consuming equipment to maintain the overall performance without deterioration under the current operating conditions. At this time, if the preset opening calibration is met, the opening of the bypass control valve can be adjusted to test the maximum opening of the bypass control valve under the condition that the overall performance of the downstream gas-consuming equipment is not deteriorated. Update the valve opening value corresponding to the operating condition data in the valve opening calibration data using the optimal opening value; The valve opening calibration data includes multiple sets of operating condition data and the valve opening value of the bypass control valve corresponding to each set of operating condition data; the multiple sets of operating condition data are preset in the valve opening calibration data. The preset opening calibration conditions include: detecting excessive air intake and the inlet pressure being within the preset gas storage pressure range; the optimal opening is the maximum opening of the bypass control valve while ensuring that the comprehensive performance of the downstream gas-using equipment is not inferior to the initial performance. The air inlet of the downstream air-consuming equipment is connected to the outlet of the air intake filtration system.

[0047] This application embodiment enables the calibration of the bypass control valve opening value corresponding to multiple operating condition data. During normal operation of the intake air filtration system, the valve opening calibration data can be directly queried based on actual operating conditions, or the valve opening value can be determined by interpolation of adjacent values. This simplifies the control process during normal operation and reduces the number of sensors required, such as flow meters and sensors for acquiring comprehensive indicators, thereby simplifying the system complexity during normal operation. It ensures that during the use of the intake air filtration system, the bypass control valve only opens to an appropriate degree to divert excess gas to the gas storage device when the pressure of the excess gas meets the gas storage conditions. This ensures that the gas storage device receives gas with pressures meeting the backflushing dust removal requirements without deteriorating the operating conditions of downstream gas-using equipment.

[0048] Furthermore, real-time acquisition of the intake air volume of downstream gas-consuming equipment and the inlet pressure of the bypass gas path also includes: real-time acquisition of the inlet temperature of the bypass gas path. The preset opening calibration conditions also include: the inlet temperature is less than or equal to the preset temperature threshold. The intake air filtration system also includes: a cooling device connected in series with the pressurized air path; and a bypass air path connected to the outlet side of the pressurized air path of the cooling device to guide gas from the outlet side of the cooling device to the air storage device.

[0049] This application embodiment can be used to calibrate a system with a bypass gas path set from the outlet side of the cooling device. This allows for the determination of the valve opening calibration value while simultaneously considering that the pressure and temperature of the gas obtained by the gas storage device are within a reasonable range. This ensures that during the use of the air intake filtration system, the bypass control valve will only open to an appropriate degree to divert excess gas to the gas storage device when the pressure and temperature of the excess gas meet the gas storage conditions. This ensures that the gas storage device can obtain gas that meets the backflushing dust removal requirements in terms of both pressure and temperature without causing deterioration of the operating conditions of downstream gas-using equipment. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the architecture of an air intake filtration system according to one embodiment of this application; Figure 2 This is a flowchart of an intake filtration control method according to one embodiment of this application; Figure 3 This is a flowchart of a bypass control valve calibration method, which is one of the embodiments of this application.

[0051] Figure label: 1-First filtration device; 11-First air intake control valve; 12-First dust removal control valve; 13-First dust collection bag; 2-Pressure booster device; 3-Air storage device; 31-Bypass air path; 32-Bypass control valve; 4-Second filtration device; 41-Second air intake control valve; 42-Second dust removal control valve; 43-Second dust collection bag; 5-Cooling device; 6-Subsequent air consumption equipment; 7-Air intake filtration system outlet. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some embodiments of the technical solutions of this application, and not all embodiments. Based on the embodiments recorded in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the technical solutions of this application.

[0053] For ease of understanding, some embodiments use an engine as an example for illustration, but this should not be construed as limiting the scope of protection of this application. The embodiments of this application are not limited thereto. Any system or method that applies the embodiments of this application to a system in which the filtration device directly or indirectly supplies air to downstream air-consuming equipment via a pressurization device is within the scope of protection of this application. In the embodiments of this application, valve closure or an opening degree of 0 indicates that the valve is in a completely closed state.

[0054] Traditional engine intake systems, in order of airflow path, include an air filter, turbocharger, intercooler, and engine. The inventors discovered that intake supply systems with turbochargers often exhibit excessive intake under most operating conditions. Utilizing this characteristic, the inventors implemented the intake filtration system in the following embodiments. When excessive intake occurs, it can obtain air from the downstream air passage (i.e., the post-turbocharged air passage) of the turbocharger and supply it to the air storage device. Furthermore, the opening of the bypass control valve can control the amount of gas diverted to the air storage device to prevent it from exceeding the excessive intake, thus maintaining normal system operation. The following embodiments, based on traditional engine intake systems, incorporate a bypass air passage downstream of the turbocharger. This bypass air passage obtains gas pressurized by the turbocharger and provides it to the air storage device, thus providing a clean air source with sufficient pressure for dust removal without the need for additional air storage and pressurization equipment.

[0055] Firstly, Figure 1 This is a schematic diagram of the architecture of an air intake filtration system according to one embodiment of this application. It is a schematic diagram of the architecture of a specific embodiment of the air intake filtration system of this application, and is used herein to aid in understanding the embodiments of this application, and is not intended to limit the embodiments of this application. Figure 1As shown, this application provides an intake air filtration system, including: at least one filtration device connected in parallel (see reference). Figure 1 The first filter device 1 and the second filter device 4), the pressurizing device 2, the pressurized air passage 21, the air storage device 3, the control unit, the bypass air passage 31, and the bypass control valve 32 installed in the bypass air passage 31. Each filtration unit is connected to the booster unit 2 via an on / off air path to control whether the booster unit obtains clean gas from the corresponding filtration unit; wherein, each filtration unit is used to filter and output clean gas from the gas outside the intake filtration system when connected to the booster unit 2. The booster device 2 is connected to the intake air filter system outlet 7 through the boosted air passage 21, so that the gas boosted by the booster device 2 is output from the intake air filter system outlet 7 through the boosted air passage 21. The inlet end of the bypass gas path 31 is connected to the pressurized gas path 21, and the outlet end of the bypass gas path 31 is connected to the gas storage device 3, so that when the bypass control valve is turned on, the gas is diverted from the pressurized gas path and stored in the gas storage device; the gas storage device 3 is connected to each filter device by a gas path that can be turned on and off, so as to control whether the gas storage device 3 back-flushes the corresponding filter device for dust removal. The control unit controls the flow of air between each filtration unit, the booster unit, and the gas storage unit, and obtains the real-time operating conditions of the downstream air-consuming equipment of the intake filtration system. Based on the real-time operating conditions, it controls the opening of the bypass control valve to divert gas from the boosted air path to the gas storage unit while maintaining the overall performance of the downstream air-consuming equipment without deterioration. Here, "no deterioration of overall performance" means that the overall performance of the downstream air-consuming equipment after the bypass control valve is opened is not worse than that before the bypass control valve is opened.

[0056] Different downstream gas-using equipment can determine their corresponding comprehensive indicators based on their own performance parameters. The comprehensive indicators may involve one or more performance parameters. A method to determine whether the comprehensive indicators have deteriorated is that the value of one or more performance parameters involved in the comprehensive indicators when the bypass control valve is open is better than or equal to the value of one or more performance parameters involved in the comprehensive indicators when the bypass control valve is closed. Another method to determine whether the comprehensive indicators have deteriorated is that the value obtained by weighted summing the values ​​of one or more performance parameters involved in the comprehensive indicators when the bypass control valve is open is better than or equal to the value obtained by weighted summing the values ​​of one or more performance parameters involved in the comprehensive indicators when the bypass control valve is closed in the same way. The term "better than" here refers to specific performance parameters or weighted sums, and can be greater than or less than. For example, regarding exhaust emissions, the statement that the exhaust emissions with the bypass control valve open are better than or equal to the exhaust emissions with the bypass control valve closed should be understood as the statement that the exhaust emissions with the bypass control valve open are less than or equal to the statement that the bypass control valve closed ... the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement For positive indicators, "better than or equal to" specifically means "greater than or equal to"; for negative indicators, "better than or equal to" specifically means "less than or equal to". When performing weighted summation, positive indicators use positive coefficients and negative indicators use negative coefficients. When comparing weighted summation values, "better than or equal to" should generally mean "greater than or equal to".

[0057] For example, taking an engine as an example, the comprehensive indicators include: power performance (e.g., torque), economy (e.g., fuel consumption), and / or emissions (e.g., the content of nitrogen oxides, carbon monoxide, and particulate matter in the exhaust gas), etc. However, the embodiments of this application are not limited to these, and any indicator used to compare the operating performance of downstream gas-using equipment falls within the protection scope of this application. As a specific embodiment, when determining whether the comprehensive indicator has deteriorated, the power performance, economy, and / or emissions indicators can be weighted and summed to obtain a weighted indicator. The weighted indicator under the bypass control valve on condition is compared to the weighted indicator under the bypass control valve off condition. If the weighted indicator under the bypass control valve on condition is greater than or equal to the weighted indicator under the bypass control valve off condition, then the corresponding comprehensive indicator has not deteriorated; otherwise, the corresponding comprehensive indicator has deteriorated. In this embodiment, the supercharging device functions to provide pressurized gas to downstream air-consuming equipment of the intake air filtration system, such as a turbocharger in an engine system. In a system with a supercharging device, the amount of pressurized gas output may exceed the amount of gas required by the downstream air-consuming equipment to maintain constant operating conditions; that is, there may be an excess of pressurized gas output by the supercharging device. Utilizing this characteristic, when there is an excess of pressurized gas output by the supercharging device, the excess gas is stored in a gas storage device, providing the gas storage device with a certain pressure (because the gas used for backflushing and dust removal of the filtration device needs to meet certain requirements). The pressurization device uses clean gas (filtered by the filtration device) within a certain pressure range as the backflushing gas for dust removal. Therefore, the pressurization device also provides a certain pressure and an excess of gas relative to downstream air-consuming equipment to the gas storage device, thereby fully utilizing the gas drawn into the intake filtration system. Thus, for systems that already have a pressurization device, improvements to the intake filtration system structure based on this application eliminate the need to add an additional pressurization device or air pump to the gas storage device. The pressurization device in existing systems with built-in pressurization devices can be reused, making it easier and cheaper to upgrade existing systems with less modification. The embodiments of this application are suitable for operation in high-dust environments, and can stably obtain a backflushing gas source that meets the requirements without the need for additional pressurization devices. During the gas storage process in the gas storage device, or when there are multiple filtration devices, the multiple filtration devices can serve as backups for each other. During the cleaning process of the intake filtration system with multiple filtration devices, it does not affect the power output, fuel economy and emission compliance of downstream gas-using equipment. It can realize the online self-cleaning function of the air filter and significantly reduce the frequency of equipment downtime maintenance and the overall operation and maintenance cost.

[0058] The function of the gas storage device is to collect gas with the pressure and / or temperature required for backflushing dust removal during the period when a usable filtration device is available and during the period when the excess gas (already clean gas) output by the pressurization device is used for backflushing dust removal when a filtration device is required.

[0059] Excess gas is the portion of gas in the pressurized air passage 21 that exceeds the minimum gas volume required to be output at the intake air filter system outlet 7. The minimum gas volume required to be output at the intake air filter system outlet 7 is determined by the minimum gas volume required to maintain the overall performance of the downstream air-consuming device 6 of the intake air filter system without deterioration. It is understood that, based on the examples of the embodiments in this application, those skilled in the art can determine the minimum gas volume required to be output at the intake air filter system outlet 7 for a specific application without any obstacles.

[0060] The amount of gas supplied to downstream gas-consuming equipment via the pressurized gas path (outlet of the air intake filter system) and the real-time operating conditions of the downstream gas-consuming equipment can affect its overall performance. When the supplied gas exceeds the amount required to maintain the overall performance under the current operating conditions, even if the supplied gas is reduced, as long as the supplied gas is not less than the required amount, the overall performance of the downstream gas-consuming equipment will not deteriorate. Therefore, in practical applications, it is not necessary to directly obtain the minimum gas volume and the gas volume in the pressurized gas path, nor directly determine whether there is excess gas. Instead, it can be determined by obtaining the real-time operating conditions of the downstream gas-consuming equipment. Based on the real-time operating conditions, the opening of the bypass control valve can be set to the maximum opening that maintains the overall performance without deterioration. In this case, when the bypass control valve is open at this maximum opening, the gas entering the gas storage device from the bypass gas path is excess gas. Specifically, dynamic adjustment methods can employ PID control, while static methods can pre-calibrate the valve opening values ​​of the corresponding bypass control valves for multiple operating conditions. By using the pre-calibrated valve opening calibration data, the valve opening value of the corresponding bypass control valve can be used under the operating conditions. This ensures that the overall performance of the downstream gas-consuming equipment does not deteriorate, while diverting excess gas from the pressurized gas path to the gas storage device. During use, the corresponding bypass control valve opening value can be obtained directly from a table based on real-time operating conditions or by interpolation after table lookup.

[0061] The bypass control valve's function is to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of downstream gas-using equipment. It's important to note that the bypass control valve only opens when excess gas is present to store it in the storage device. For example, even if the pressurization unit is outputting pressurized gas, if the output volume is less than or equal to the minimum required output volume at the outlet of the inlet filtration system, gas will not be diverted to the storage device to avoid degrading the overall performance of downstream gas-using equipment. Thus, the combination of the bypass control valve and the storage device achieves a zero-storage effect. When a filtration unit requires dust removal, the storage device centrally provides purge gas to that filtration unit for backflushing dust removal, achieving a complete gas extraction effect. In other words, by combining the bypass control valve with the excess gas obtained after filtration and pressurization from the pressurization unit and supplying it to the storage device, the storage device centrally outputs dust removal gas when dust removal is needed, achieving a zero-storage and complete gas extraction effect within the storage device. Therefore, during the normal intake filtration of the intake filtration system, the gas storage device can pre-store the gas required for dust removal, and when dust removal is needed, the gas in the gas storage device can be directly used for dust removal.

[0062] For an air intake filtration system with only one filter, although downstream air-consuming equipment still needs to be shut down during the dust removal process of that single filter, the system stores air in the storage device during the filtration process, ensuring readily available dust-collecting gas when needed. Dust removal can begin immediately without the need for additional preparation of dust-collecting gas, thus shortening downtime. For an air intake filtration system with multiple filters, these filters can be divided into filtration and standby states. When a filter in the current filtration state needs dust removal, the standby filter is activated first to continue supplying air to the pressurization unit. The air path between the filter requiring dust removal and the pressurization unit is then blocked, and dust removal is initiated. The filter after dust removal is then configured as a standby unit, thus eliminating the need for downstream air-consuming equipment to be shut down and maintaining the continuous and stable operation of the entire air-consuming system. Moreover, in an air intake filtration system with multiple filtration devices, during the dust removal process, since there are other available filtration devices continuously filtering the intake air, the gas storage device can still obtain excess gas from the pressurized air path. If the gas pressure in the gas storage device drops significantly, the gas storage device can obtain supplementary gas during the dust removal process to ensure that the gas storage device can complete the dust removal operation.

[0063] The intake air filtration system in this application includes, but is not limited to, gasoline engine systems, diesel engine systems, etc. However, the embodiments of this application are not limited to these. Any system that filters intake air to provide clean gas for downstream air-consuming equipment falls within the protection scope of this application. Accordingly, downstream air-consuming equipment includes, but is not limited to, gasoline engines or generators, diesel engines or generators, (industrial) vacuum cleaners, fresh air systems and other air purification equipment, gas engines, etc.

[0064] In summary, the embodiments of this application have the following technical effects: the combination of a filtration device, a pressurizing device, a pressurized gas path, a bypass control valve, and a gas storage device enables the gas storage device to obtain gas with a certain pressure after the pressurizing device provides pressurized gas to the downstream gas-using equipment, so as to meet the pressure required for backflushing dust removal gas. Furthermore, by providing a bypass control valve, excess gas can be diverted to the gas storage device by controlling the opening of the bypass control valve, thereby providing a gas source for the gas storage device without affecting the operating conditions of the downstream gas-using equipment. When dust removal is required, if there is only one filtration device in the inlet filtration system, the downtime of the downstream gas-using equipment can be shortened; if there are multiple filtration devices, the downstream gas-using equipment can be kept running without stopping, maintaining the continuous and stable operation of the overall system. Based on this system, automatic dust removal of the filtration device can be achieved, and it can be used in high-dust environments. For systems that already have a booster, the existing system can be improved at a lower cost to achieve the embodiments of this application, reducing system upgrade costs. Without the need to install an additional booster, a stable pulse backflushing air source that meets the requirements can be obtained. The cleaning process does not affect the engine's power output, fuel economy, or emission compliance. It can achieve the online self-cleaning function of the air filter and significantly reduce the frequency of equipment downtime maintenance and overall operation and maintenance costs.

[0065] Preferably, such as Figure 1 The intake filtration system also includes: a cooling device 5 connected in series with the pressurized air passage 21; and a bypass air passage 31 connected to the pressurized air passage at the outlet side of the cooling device 5 to guide gas from the outlet side of the cooling device 5 to the air storage device 3.

[0066] The temperature of the gas blown in during backflushing dust removal of the filter device must not exceed the preset temperature threshold. The preset temperature threshold is the minimum temperature of the backflushing dust removal gas allowed in the factory parameters of each filter device in the air intake filter system, so as to ensure that the filter device is not damaged during backflushing dust removal. However, the pressurized gas output from the booster has a high temperature. Therefore, when excess gas is diverted from the booster and before the cooling device to the gas storage device, the gas entering the storage device is high-temperature gas and cannot be immediately used for backflushing dust removal. Normally, when the filtration device needs dust removal, the gas storage device in the system has already completed gas storage and preservation for a period of time during the initial usable period of the filtration device. Therefore, the gas in the storage device usually needs to be preserved for a certain period of time before it is used for backflushing dust removal. Thus, during backflushing dust removal, the gas temperature can be reduced to below the preset temperature threshold. In addition, considering that the gas temperature is high after being pressurized but not cooled before entering the storage device, the gas pressure will also decrease after cooling in the storage device. However, in the subsequent intake filtration process, excess gas will continue to be used to replenish the storage device and neutralize the temperature. Therefore, when dust removal is finally required, the gas pressure and temperature in the storage device can meet the dust removal requirements. Therefore, the intake filtration system that diverts excess gas from the booster and before the cooling device to the storage device is still practical.

[0067] To maximize the protection of the filter, it is preferable to divert excess gas from the outlet side of the cooling device to the gas storage device. This ensures that the gas entering the gas storage device meets the required pressure and temperature, guaranteeing that the filter will not be damaged by excessively high gas temperature when backflushing is triggered, thus enabling smooth dust removal. Furthermore, the temperature of the gas entering the gas storage device is relatively low, typically below 50 degrees Celsius, resulting in minimal pressure loss after the gas cools to room temperature.

[0068] As a specific embodiment, the filtration device includes a first filtration device 1 and a second filtration device 4; The first filtration device 1 and the booster device 2 are connected by an on / off air passage. For example, the first filtration device 1 and the booster device 2 are connected through a first air intake control valve 11 to control whether the booster device 2 obtains clean gas from the first filtration device 1. The second filtration device 4 and the booster device 2 are connected by an on / off air passage. For example, the second filtration device 4 and the booster device 2 are connected through a second air intake control valve 41 to control whether the booster device 2 obtains clean gas from the second filtration device 4. The booster device 2 is connected to the intake air filter system outlet 7 through the boosted air passage 21. The cooling device 5 is connected in series in the boosted air passage 21 so that the gas boosted by the booster device 2 is cooled by the cooling device 5 and then output through the intake air filter system outlet 7. The bypass gas path 31 is connected to the pressurized gas path on the outlet side of the cooling device 5 to draw gas to the gas storage device 3 during the period when the bypass control valve 32 is open. The gas storage device 3 is connected to the first filter device 1 through an air passage that can be turned on and off. For example, the gas storage device 3 and the first filter device 1 are connected through the first dust removal control valve 12 to control whether the gas storage device back-flushes the first filter device for dust removal. The gas storage device 3 and the second filter device 4 are connected by an on / off air passage. For example, the gas storage device 3 and the second filter device 4 are connected by a second dust removal control valve 42 to control whether the gas storage device 3 back-flushes the second filter device 4 for dust removal.

[0069] The two filtration units (the first and second filtration units) can serve as backups for each other. When one is in filtration mode, the other is in standby mode. During dust removal by the filtration unit currently in filtration mode, the standby filtration unit is first connected to the air supply line for the downstream air-consuming equipment as the new filtration unit. Then, the original filtration unit is disconnected from the air supply line for the downstream air-consuming equipment. This ensures a continuous air supply to the downstream air-consuming equipment and improves system stability. The gas storage device draws excess gas from the outlet side of the cooling device via a bypass. The gas entering the gas storage device meets both the pressure and temperature requirements for backflushing dust removal, ensuring that the filtration unit is not damaged during backflushing dust removal.

[0070] Furthermore, it also includes: each filter unit is connected to a corresponding dust collection bag. For example... Figure 1 As shown, a first dust collection bag 13 is connected to the first filter device 1, and a second dust collection bag 43 is connected to the second filter device 4. The dust and impurities filtered by each filter device are collected into their respective dust collection bags to avoid secondary pollution to the environment.

[0071] Furthermore, the control unit includes: An initialization module is used to configure at least one of the filters to filter mode and the rest to standby mode when the intake filtration system is started. Initially, all filtration devices are clean and ready to operate in filtration mode. When the intake filtration system starts, all filtration devices can be controlled to operate in filtration mode, or some can operate in filtration mode while others remain in standby mode. For intake filtration systems that have been used for a period of time, after a mid-term shutdown and restart, some filtration devices may be operating in filtration or standby mode, while others may be in a state awaiting dust removal. During startup, some or all filtration devices capable of operating in filtration mode are configured to filtration mode, the remaining filtration devices capable of operating in filtration mode are configured to standby mode, and filtration devices requiring dust removal are configured to a state awaiting dust removal. All filtration devices capable of operation in filtration mode can be configured in filtration mode. When the performance of all filtration devices is essentially the same, they may simultaneously enter a state requiring dust removal. In this case, the state changes of all filtration devices will be synchronized, essentially functioning as a single filtration device. However, if the performance of different filtration devices varies significantly, some devices will enter a state requiring dust removal after operating for a period of time, thus being configured as a standby state. When the dust removal conditions are met, they will be backflushed for dust removal. After dust removal, these standby filtration devices will be configured as a standby state. In other words, due to differences in the filtration devices themselves or the gas quality at their installation locations, the actual performance of each filtration device varies significantly. This will naturally lead to a differentiation between some filtration devices in filtration mode and others in standby mode as the intake filtration system continues to operate.

[0072] Optionally, at startup, some of the filter devices capable of operating in the filtration state are configured to filtration state, while the remaining filter devices capable of operating in the filtration state are configured to standby state; alternatively, the filter devices in the filtration state and standby state can be allocated in equal proportions.

[0073] The gas storage control module is used to acquire the gas parameters at the inlet of the bypass gas path, determine whether the gas parameters meet the preset gas storage conditions, and control the bypass control valve to close if the gas parameters do not meet the preset gas storage conditions. Otherwise, it acquires the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system and controls the opening of the bypass control valve according to the real-time operating conditions, so as to divert gas from the pressurized gas path to the gas storage device while keeping the comprehensive indicators of the downstream gas-using equipment from deteriorating. During the period when the intake filtration system supplies air to downstream air-consuming equipment, the gas in the pressurized air path is used as the air source for the air storage device. However, the gas in the pressurized air path cannot be used as the air source for the air storage device at any time. For example, the gas in the air storage device is used as the backflushing dust removal gas, and it must be a clean gas that meets at least the air pressure required for backflushing dust removal. If the air pressure is too low, the dust removal effect will not be achieved; if it is too high, it may damage the filter being backflushed. Therefore, it is necessary to determine the gas parameters of the gas in the pressurized air path (which are the same as the gas parameters at the inlet of the bypass air path). Only when the gas parameters meet the preset air storage conditions can it be used as the air source for the air storage device. On the premise that the air source meets the requirements, in order not to affect the overall performance of the downstream air-consuming equipment, it is necessary to control the opening of the bypass control valve, diverting only excess gas to ensure a normal supply of the amount of gas required to maintain the overall performance of the downstream air-consuming equipment under the current real-time operating conditions. In addition, when there are two or more filtration devices, and they are divided into a partial filtration state and a remaining standby state, it is possible to ensure that there is always a usable filtration device working in the filtration state at any time. In this way, clean pressurized gas always flows through the pressurized air path. When the air pressure of the air storage device is too low during the backflushing dust removal of the air storage device, the excess gas in the pressurized air path can be used to replenish the air storage device at the same time while the air storage device is backflushing dust removal of other filtration devices.

[0074] The filter status monitoring module is used to acquire the operating parameters of the filter device for each filter status during the operation of the intake filter system, determine whether the operating parameters meet the corresponding preset dust removal conditions of the filter device, and if the operating parameters meet the preset dust removal conditions, the filter device is selected as the first target filter device and the backup control module is triggered. The backup control module is used to check whether there is a backup filter device. If a backup filter device is detected, one filter device is selected from all the backup filter devices as the second target filter device, and the second target filter device is configured to filter. The pre-dust removal control module is used to configure the first target filter device to be ready for dust removal after the backup control module has been executed. The preset dust removal conditions for the filtration devices serve as the basis for determining whether a particular filtration device requires dust removal. These preset dust removal conditions can be constructed based on parameters provided by the filtration device manufacturer that indicate its performance. If the preset dust removal conditions are met based on the filtration device's operating parameters, then the filtration device requiring dust removal needs to be cleaned. However, before disconnecting the filtration device requiring dust removal from the pressurization device's air path, the first backup control module must be triggered to determine if there are any available backup filtration devices. If there are available backup filtration devices, preferably, one backup filtration device is first configured as the filtration device, and then the filtration device requiring dust removal is configured as the device awaiting dust removal. This ensures that the number of filtration devices working with the pressurization device remains constant, maintaining air intake stability and thus ensuring the stable operation of downstream air-consuming equipment. If there are no available backup filtration devices, the filtration device requiring dust removal is directly configured as the device awaiting dust removal, and the remaining filtration devices still operating in the filtration state continue to supply air to the downstream air-consuming equipment. For an air intake system with only one filter, when the filter needs dust removal, the downstream air-consuming equipment will shut down. However, since the air storage device has already stored air during the normal filtration period of the filter, the filter can be immediately configured to be ready for dust removal and backflushing can be performed without waiting for the backflushing gas to be prepared, which can shorten the downtime.

[0075] The dust removal control module is used to check whether there are filter devices in the dust removal state. When a filter device in the dust removal state is detected, the air storage device is controlled to back-flush all filter devices in the dust removal state and configure the filter devices in the dust removal state that have completed the dust removal as standby. The configuration for the filtration state includes controlling the corresponding filtration device to disconnect the air path from the air storage device and to connect the air path from the pressurization device, and marking the status of the corresponding filtration device as filtration state; the configuration for the standby state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as standby state; the configuration for the dust removal state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as dust removal state.

[0076] Optionally, the control unit further includes a filter replenishment module, used to determine whether the number of filter devices in the filter state is less than a preset filter quantity, and whether there are filter devices in the standby state. If it is determined that the number of filter devices in the filter state is less than the preset filter quantity and there are filter devices in the standby state, then a first number of standby filter devices are configured to be in the filter state; the first number is the smaller value between the preset filter quantity and the difference between the number of filter devices in the filter state and the number of filter devices in the standby state. This ensures that the number of filter devices in the filter state in the intake air filter system is always the preset filter quantity, maintaining the stability of the intake system.

[0077] Specifically, each filtration unit is pre-configured with a corresponding dust removal differential pressure threshold and a cleanliness baseline differential pressure. These can be obtained from the manufacturer's factory parameters. Different filtration units or filtration units from different manufacturers may have the same or different dust removal differential pressure thresholds and cleanliness baseline differential pressures. When the inlet and outlet differential pressure of a filtration unit is greater than or equal to the corresponding dust removal differential pressure threshold, the filtration unit needs to perform dust removal; otherwise, dust removal is not required. For filtration units during the dust removal process, if the inlet and outlet differential pressure is less than or equal to the corresponding cleanliness baseline differential pressure, the filtration unit has completed dust removal.

[0078] In an intake filter system with or without a cooling device in the pressurized air path, when the bypass air path diverts excess gas in the pressurized air path, the gas parameters at the inlet of the bypass air path may include: the inlet pressure of the bypass air path; the preset gas storage conditions may include: the inlet pressure is greater than or equal to the gas storage pressure of the gas storage device and the inlet pressure is within the preset gas storage pressure range. The gas storage device needs to obtain clean gas and at least meet a certain pressure for backflushing dust removal. The inlet pressure must be greater than or equal to the storage pressure of the gas storage device to ensure that after the bypass control valve is opened, excess gas can flow from the pressurized gas path to the gas storage device. Furthermore, the inlet pressure of the bypass gas path must be within the preset storage pressure range to ensure that the gas pressure in the storage device meets the requirements for backflushing dust removal. Too low a storage pressure will not achieve the desired dust removal effect, while too high a storage pressure can easily damage the filter device. The preset storage pressure range can be obtained from the factory parameters of each filter device manufacturer. For example, typically, the upper limit of the preset storage pressure range is less than 100 kPa.

[0079] In an air intake filtration system with a cooling device connected in series in the pressurized air path, when excess gas is diverted to the outlet side of the cooling device in the bypass air path, the gas parameters at the inlet of the bypass air path can include: the inlet pressure and inlet temperature of the bypass air path; preset gas storage conditions include: the inlet pressure is greater than or equal to the gas storage pressure of the gas storage device and the inlet pressure is within the preset gas storage pressure range, and the inlet temperature is less than or equal to a preset temperature threshold; the preset temperature threshold can be the minimum allowable temperature of the backflushing dust removal gas obtained from the manufacturer's parameters of each filtration device, to ensure that the temperature of the gas stored in the gas storage device for backflushing dust removal is suitable for all filtration devices. For example, the preset temperature threshold is typically less than or equal to 50 degrees Celsius.

[0080] In this process, excess gas is diverted from the outlet side of the cooling device to the gas storage device, which allows the gas entering the gas storage device to meet the required pressure and temperature, ensuring that dust removal can be completed without damaging the filter device at any time when backflushing dust removal is triggered.

[0081] The operating parameters of the filtration device include: the inlet and outlet pressure difference of the corresponding filtration device; the inlet and outlet pressure difference of the filtration device is the difference between the gas pressure at the outlet and the gas pressure at the inlet of the filtration device. When the permeability of the filtration device is relatively good, the difference between the two is small. When a lot of dust and impurities are adsorbed, blockage occurs, resulting in a significant increase in the outlet and inlet pressure difference.

[0082] Preset dust removal conditions include: the inlet and outlet pressure difference of the corresponding filter device is greater than or equal to the corresponding dust removal pressure difference threshold; the dust removal pressure difference threshold is a parameter provided by the filter device manufacturer. If the inlet and outlet pressure difference is greater than or equal to the corresponding dust removal pressure difference threshold, it means that dust removal is required; otherwise, it can continue to be used for filtration.

[0083] The gas storage status of the gas storage device includes: the gas storage pressure of the gas storage device; Preset dust removal conditions may include: the gas storage pressure is within a preset gas storage pressure range; if the gas storage pressure is within a preset gas storage pressure range, it means that the pressure of the gas stored in the gas storage device is suitable for backflushing dust removal of the filter device.

[0084] Preferably, for the intake air filtration system, especially for the intake air filtration system without a cooling device or with a bypass air path connected between the pressurization device and the cooling device, the gas storage temperature in the gas storage device can also be obtained, and the preset dust removal conditions can include: the gas storage pressure is within a preset gas storage pressure range and the gas storage temperature is less than or equal to a preset temperature threshold; thereby ensuring that backflushing dust removal is only started when the gas storage pressure and gas storage temperature in the gas storage device meet the requirements of the filter device for backflushing dust removal.

[0085] As a specific embodiment, when there is only one filter device in the air intake filtration system, when the system starts, the filter device is configured to filter state and continuously filters the intake air. During this continuous filtration, gas flows to the downstream air-consuming equipment at the bypass gas inlet. When the gas parameters meet the preset gas storage conditions, the gas storage device will store gas. After running for a period of time, when the operating parameters of the filter device meet the corresponding preset dust removal conditions, since there are no other filter devices, the filter device is configured to be in a dust removal standby state (at this time, the downstream air-consuming equipment needs to be shut down because there is no gas supply). The gas storage device has already stored gas during the normal filtration intake period. At this time, the preset gas removal conditions are met, so the gas storage device can be controlled to backflush the filter device for dust removal. After the backflushing dust removal is completed, the filter device is configured to standby state. Since there is only one filter device in the system, when the downstream air-consuming equipment is started, the filter device needs to be configured to filter state.

[0086] As a specific embodiment, when the intake filtration system has two filtration devices, such as Figure 1 As shown, in the initial stage, both the first filter device 1 and the second filter device 4 are clean and usable. Figure 1 In a specific embodiment, the control unit is connected to the first intake control valve, the first dust removal control valve, the second intake control valve, the second dust removal control valve, and the bypass control valve to control the blocking or opening of the corresponding control valves (opening or closing), thereby controlling the blocking or opening of the air path where the corresponding control valve is located; the following description takes the example of configuring the first filter device in the filtering state and the second filter device in the standby state during startup, so that the two filter devices can serve as backups for each other; Assuming the first filter device 1 is currently configured in filtration mode and the second filter device 4 is configured in standby mode, during the operation of the first filter device 1, the air storage device 3 will utilize the excess air in the pressurized air path for storage. When the first filter device 1 needs dust removal, the second filter device 4 is first configured in filtration mode, and then the first filter device 1 is configured in dust removal mode. During the period when the second filter device 4 supplies air to the pressurization device 2, the air storage device 3 performs backflushing dust removal on the first filter device 1. After the dust removal is completed, the first filter device 1 is configured in standby mode until the second filter device 4 needs dust removal. Then, the first filter device 1 is configured in filtration mode again, and the second filter device 4 is configured in dust removal mode. Repeating the above process can ensure the continuous and stable operation of the downstream air-using equipment. In this embodiment, since there is always a usable filtration device to provide clean air to the pressurization device 2, if the air storage pressure of the air storage device 3 is too low during the dust removal process, the bypass control valve 32 can be opened to replenish the air storage device 3 while ensuring that the working condition of the downstream air-using equipment does not deteriorate.

[0087] The following description mainly focuses on the control logic of each control valve and control unit. Changes in the status flags of the corresponding filtration devices will not be repeated and can be understood based on the aforementioned embodiments.

[0088] The initialization module of the control unit is specifically used to configure the first filter device to filtration mode and the second filter device to standby mode when the intake air filtration system is started. Specifically, it controls the first dust removal control valve to block the air path between the first filter device and the air storage device, controls the first intake control valve to open the air path between the first filter device and the pressurization device, controls the second dust removal control valve to block the air path between the second filter device and the air storage device, and controls the second intake control valve to block the air path between the second filter device and the pressurization device. The intake air filtration system filters the intake air through the first filter device to obtain clean gas. The clean gas is pressurized by the pressurization device to obtain pressurized gas, and the pressurized gas reaches the outlet of the intake air filtration system through the pressurized gas path. Preferably, a cooling device can be connected in series in the pressurized gas path to cool the pressurized gas. Preferably, a bypass gas path is connected in the pressurized gas path between the cooling device and the outlet of the intake air filtration system.

[0089] The gas storage control module is used to acquire gas parameters at the inlet of the bypass gas path, determine whether the gas parameters meet the preset gas storage conditions, and control the bypass control valve to close if the gas parameters do not meet the preset gas storage conditions. Otherwise, it acquires the real-time operating conditions of the downstream gas-consuming equipment of the intake air filtration system and controls the opening of the bypass control valve according to the real-time operating conditions to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of the downstream gas-consuming equipment. Specifically, the bypass gas path can be connected to the pressurized gas path between the pressurization device and the cooling device. In this case, the gas parameters include the inlet pressure, and the preset gas storage conditions include that the inlet pressure is greater than or equal to the gas storage pressure of the gas storage device and the inlet pressure is within the preset gas storage pressure range. Alternatively, it can be... Figure 1 The pressurized gas path shown is connected between the cooling device and the outlet of the intake air filtration system. At this point, the gas parameters include inlet pressure and inlet temperature. The preset gas storage conditions include: inlet pressure greater than or equal to the storage pressure of the gas storage device and within the preset storage pressure range; and inlet temperature less than or equal to a preset temperature threshold. Only when the filtration device is operating in filtration mode will gas pass through the filtration device and pressurization device (and possibly the cooling device) to reach the inlet of the bypass gas path, thus allowing the gas parameters to meet the preset gas storage conditions. When the filtration device is not operating in filtration mode, no gas will reach the inlet of the bypass gas path, and the preset gas storage conditions will certainly not be met.

[0090] The filtration status monitoring module is specifically used to filter the intake external gas by the filtration device in the filtration status (currently the first filtration device; when the first filtration device needs dust removal, the second filtration device will be used, and the two filtration devices will work alternately as backups). During the operation of the intake filtration system, the module acquires the operating parameters of the filtration device in the filtration status, determines whether the operating parameters meet the corresponding preset dust removal conditions of the filtration device, and if the operating parameters meet the preset dust removal conditions, the filtration device in the filtration status is selected as the first target filtration device, triggering the backup control module. Specifically, the module determines whether the inlet and outlet pressure difference of the filtration device in the filtration status is greater than or equal to the corresponding dust removal pressure difference threshold. If the inlet and outlet pressure difference of the filtration device in the filtration status is greater than or equal to the corresponding dust removal pressure difference threshold, the filtration device in the filtration status is selected as the first target filtration device, triggering the backup control module. The operating parameters include the inlet and outlet pressure difference of the corresponding filtration device. During the period when the filtration device in the current filtration state does not meet the preset dust removal conditions, the current filtration device is used to filter the intake air, and the filtration device in the current filtration state is judged in real time (it can be periodically detected) to see if the filtration device in the current filtration state meets the preset dust removal conditions. When it is judged that the operating parameters meet the preset dust removal conditions, it means that the filtration device in the current filtration state needs to be dust removed. At this time, in order to prevent the intake system from stopping the intake air, the backup control module is first triggered to enable the backup filtration device to filter the intake air, and then the original filtration device in the current filtration state is disconnected from the air path connected to the booster device.

[0091] The backup control module is used to check whether there is a backup filter device. If a backup filter device is detected, one filter device is selected from all the backup filter devices as the second target filter device, and the second target filter device is configured to filter. The pre-dust removal control module is used to configure the first target filter device to be ready for dust removal after the backup control module has been executed. Specifically, under normal circumstances, the time required for dust removal by a filtration device is significantly less than the continuous filtration time. Therefore, when two filtration devices are operating in primary and standby modes, there is always a usable standby filtration device. Figure 1The system shown operates as follows: when the first filter is in a filtering state, the second filter is in a standby state; conversely, when the second filter is in a filtering state, the first filter is in a standby state. This example illustrates the situation where the first filter is in a filtering state and the second filter is in a standby state. When the first filter in a filtering state meets the preset dust removal conditions, the second filter is first configured to filter, and then the first filter is configured to be in a dust removal state. Specifically, the second dust removal control valve is kept closed, while the second air intake control valve is opened to connect the second filter to the pressurization device's air path. The first dust removal control valve is kept closed, while the first air intake control valve is closed to block the air path between the first filter and the pressurization device. The dust removal control module checks for the presence of filters in a dust removal state. If a filter in a dust removal state is detected, the air storage device is controlled to backflush all filters in a dust removal state, and the filters that have completed dust removal are configured to be in a standby state. Specifically, the dust removal control module can be triggered when a filter device is configured to be in a dust removal state, or it can be triggered periodically for checks; both methods are used. Specifically, for... Figure 1 In a specific embodiment, taking the first filter device as the state to be dusted and the second filter device as the state to be filtered, when the first filter device is detected as the state to be dusted, specifically, the first air intake control valve is kept blocked, and the first dust removal control valve is opened, so that the air passage between the air storage device and the first filter device is connected, so as to back-flush the first filter device for dust removal; in order to improve the reliability of the dust removal process, before the filter device in the state to be dusted starts dust removal, it can be determined whether the air storage state in the air storage device meets the preset dust removal conditions. If it is determined that the air storage state meets the preset dust removal conditions, the air storage device is then back-flushed to remove dust from the filter device in the state to be dusted (the first filter device in this embodiment). For the filter device in the backflushing dust removal (the first filter device in this embodiment), the inlet and outlet pressure difference of the filter device (the first filter device in this embodiment) is obtained until the inlet and outlet pressure difference of the filter device (the first filter device in this embodiment) is less than the corresponding clean reference pressure difference, and then the filter device (the first filter device in this embodiment) is configured as a standby state.

[0092] This application embodiment achieves primary and backup intake filtration by providing a first filter device and a second filter device, thereby ensuring a continuous air supply to the turbocharger even when one of the filter devices is undergoing dust removal, maintaining the normal operating condition of the entire system. Since excess gas is obtained from downstream of the turbocharger as the air source for the air storage device, the cleaning process does not affect the engine's power output, fuel economy, or emission compliance. This achieves both online self-cleaning of the air filter and significantly reduces the frequency of equipment downtime for maintenance and overall operating costs.

[0093] For air intake filtration systems with more than two filtration units, the above explanation can be used as a reference.

[0094] Preferably, the gas storage control module is specifically used for: Obtain the gas parameters at the inlet of the bypass gas path and determine whether the gas parameters meet the preset gas storage conditions; If it is determined that the gas parameters do not meet the preset gas storage conditions, the bypass control valve is shut off. Otherwise, the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system are obtained. Based on the real-time operating conditions, the valve opening value corresponding to the real-time operating conditions is matched from the preset valve opening calibration data, and the opening of the bypass control valve is controlled to be the valve opening value, so as to divert gas from the pressurized gas path to the gas storage device. The valve opening calibration data pre-calibrates multiple sets of operating condition data and corresponding valve opening values ​​to ensure that the overall performance of downstream gas-using equipment remains stable after the bypass control valve opening value is set to the corresponding valve opening value. By controlling the opening value of the bypass control valve, excess gas in the pressurized gas path is stored in the gas storage device via the bypass gas path. Specifically, the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system are obtained, and the valve opening value corresponding to the real-time operating conditions is matched from the preset valve opening calibration data according to the real-time operating conditions. The opening of the bypass control valve is then controlled to the valve opening value to obtain excess gas from the pressurized gas path and store it in the gas storage device. Establishing valve opening calibration data requires pre-setting multiple sets of operating condition data (possible for downstream gas-using equipment) in the valve opening calibration data. Through actual measurement, the opening of the bypass control valve is adjusted to find the maximum opening value of the bypass control valve while maintaining the overall performance of the downstream gas-using equipment without deterioration. This maximum opening value is then used to calibrate the valve opening value corresponding to the operating condition data in the valve opening calibration data. In this embodiment, known data is pre-set. The opening of the corresponding bypass control valve is determined based on the operating condition data using the pre-calibrated valve opening calibration data, rather than directly determining whether there is excessive air intake in real time. This reduces the number of sensors in the system during operation, such as eliminating the need to install a flow meter at the outlet of the air intake filter system.

[0095] In this embodiment, the presence of excess gas in the pressurized gas path is not directly detected. Instead, the real-time operating conditions of the downstream gas-consuming equipment are acquired. Based on these real-time conditions, a valve opening value corresponding to the real-time operating conditions is matched from preset valve opening calibration data. Specifically, the valve opening value corresponding to the real-time operating conditions is obtained by matching the operating condition data in the valve opening calibration data with the real-time operating conditions. Alternatively, if no operating condition data equal to the real-time operating conditions exists in the valve opening calibration data, two adjacent valve opening values ​​corresponding to two operating condition data that are numerically adjacent to the real-time operating conditions are matched with the real-time operating conditions. Linear interpolation is then performed between these two adjacent valve opening values ​​to obtain the valve opening value corresponding to the real-time operating conditions, and the opening value of the bypass control valve is set. The preset valve opening calibration data ensures that the valve opening value corresponding to the corresponding operating condition data can maintain the overall performance of the downstream gas-consuming equipment without deterioration. Therefore, the excess gas currently flowing into the gas storage device at this valve opening value is the excess gas in the pressurized gas path. The valve opening value corresponding to the operating condition data in the valve opening calibration data may be 0 or greater than 0. When it is 0, it means that the bypass control valve is closed. When it is greater than 0, it means that the bypass control valve is open according to the corresponding valve opening value.

[0096] Preferably, the dust removal control module is specifically used for: Check if there are any filter devices in a dust removal state. If any filter devices in a dust removal state are found, obtain the air storage status of the air storage device for each filter device in a dust removal state, and determine whether the air storage status meets the preset dust removal conditions. If the air storage status meets the preset dust removal conditions, control the air storage device to back-flush the filter device in a dust removal state, and configure the filter device in a dust removal state that has completed dust removal as a standby state.

[0097] To prevent the gas pressure in the gas storage device from dropping too quickly or being excessively diverted, resulting in insufficient pressure for backflushing dust removal when reaching the filter, when there are multiple filter devices in a dust removal state, each device needs to be connected to the gas storage device one by one for backflushing dust removal. During this process, if the gas storage device's pressure is insufficient, the preset dust removal conditions will not be met. In this case, the gas path between the gas storage device and the currently connected filter device will be blocked. The gas storage device will automatically replenish gas when the preset gas storage conditions are met, and will reconnect the filter device to continue backflushing dust removal after the preset dust removal conditions are met.

[0098] Specifically, controlling the gas storage device to backflush the filter device for dust removal includes: controlling the filter device in the dust removal state to disconnect the gas path from the pressurization device and connect it to the gas storage device. Specifically, the filter device in the dust removal standby state is configured as such after dust removal is completed. This includes configuring the filter device in the dust removal standby state until the inlet and outlet pressure difference of the filter device in the dust removal standby state is less than or equal to the corresponding cleanliness reference pressure difference. The cleanliness reference pressure difference of the filter device is a factory parameter provided by the filter device manufacturer. A pressure difference between the inlet and outlet that is less than or equal to this cleanliness reference pressure difference indicates that the filter device is clean and usable.

[0099] During backflushing dust removal, the air storage device and the filter device can be continuously connected for continuous backflushing until dust removal is completed. Preferably, the specific method of backflushing dust removal is pulse backflushing dust removal, which involves briefly opening and then immediately closing the air path between the air storage device and the filter device to automatically remove dust accumulated on the surface of the filter element using a short-term high-pressure reverse airflow. The duration of the short connection is in milliseconds. Pulse backflushing dust removal can be performed once or multiple times until dust removal of the filter device is completed. Using the gas in the air storage device to perform pulse backflushing dust removal on the filter device in the dust removal state improves dust removal efficiency and quality. Specifically, for Figure 1 The air intake filtration system shown can be configured to either briefly open and immediately close the first dust removal control valve via a control unit, causing the gas in the gas storage device to backflush the first filter device for pulse backflushing dust removal. Alternatively, the system can also be configured to briefly open and immediately close the second dust removal control valve via a control unit, causing the gas in the gas storage device to backflush the second filter device for pulse backflushing dust removal. During backflushing dust removal, the backflushing gas can be used to backflush the filter device through either the air outlet or the dust removal port.

[0100] Secondly, such as Figure 2 As shown, this application embodiment provides an intake filter control method, used by the aforementioned intake filter system, including: Step S21: When the intake air filtration system is started, at least one of the filtration devices is configured to filtration mode, and the remaining filtration devices are configured to standby mode. Step S22: Obtain the gas parameters at the inlet of the bypass gas path, determine whether the gas parameters meet the preset gas storage conditions, and if the gas parameters do not meet the preset gas storage conditions, control the bypass control valve to close; otherwise, obtain the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system, and control the opening of the bypass control valve according to the real-time operating conditions, so as to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of the downstream gas-using equipment without deterioration. Step S23: During the operation of the air intake filtration system, for each filtration state, obtain the operating parameters of the filtration device and determine whether the operating parameters meet the corresponding preset dust removal conditions of the filtration device. Step S24: If it is determined that the operating parameters meet the preset dust removal conditions, the filter device is selected as the first target filter device, and it is checked whether there is a filter device in standby status. Step S25: If a filter device in standby state is detected, select one filter device from all the filter devices in standby state as the second target filter device and configure the second target filter device in the filtering state. Step S26: Configure the first target filter device to be dusted. Step S27: Check if there are any filter devices in the dust removal state. If there are filter devices in the dust removal state, control the air storage device to back-flush all filter devices in the dust removal state and configure the filter devices in the dust removal state that have completed dust removal as standby. The configuration for the filtration state includes controlling the corresponding filtration device to disconnect the air path from the air storage device and to connect the air path from the pressurization device, and marking the status of the corresponding filtration device as filtration state; the configuration for the standby state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as standby state; the configuration for the dust removal state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as dust removal state.

[0101] Preferably, the real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system are obtained, and the opening of the bypass control valve is controlled according to the real-time operating conditions. This is done to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of the downstream air-consuming equipment, specifically including: The system obtains the real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system, matches the valve opening value corresponding to the real-time operating conditions from the preset valve opening calibration data, and controls the opening of the bypass control valve to the valve opening value so as to divert gas from the pressurized air path to the gas storage device. Among them, the valve opening calibration data pre-calibrates multiple sets of operating condition data and corresponding valve opening values, so that after the opening value of the bypass control valve is set to the corresponding valve opening value, the comprehensive indicators of the downstream gas-using equipment can be kept from deteriorating.

[0102] Preferably, the gas storage device is controlled to perform backflushing dust removal on all filter devices in the dust removal state, specifically including: For each filter device in the dust removal state, the gas storage state of the gas storage device is obtained, and it is determined whether the gas storage state meets the preset dust removal conditions. If it is determined that the gas storage state meets the preset dust removal conditions, the gas storage device is controlled to back-flush the filter device in the dust removal state.

[0103] Controlling the air storage device to backflush the filter device for dust removal includes: disconnecting the air path between the filter device and the pressurization device, and connecting the filter device to the air storage device. Specifically, configuring the filter device in the dust-removal-waiting state as a standby state after dust removal is completed includes configuring the filter device in the dust-removal-waiting state as a standby state when the inlet and outlet pressure difference of the filter device in the dust-removal-waiting state is less than or equal to the corresponding clean reference pressure difference.

[0104] The embodiments of this application are method-type embodiments that correspond one-to-one with the control units in the aforementioned intake air filtration system embodiments. The embodiments of this application can be understood by referring to the aforementioned intake air filtration system embodiments, and will not be repeated here.

[0105] Thirdly, such as Figure 3 As shown, this application provides a bypass control valve calibration method for calibrating an intake air filtration system as described above, including: Step S31: For each set of operating condition data in the valve opening calibration data, control the bypass control valve to close, configure the operating condition of the downstream air-consuming equipment of the intake air filter system according to the operating condition data, and obtain and record the current comprehensive index of the downstream air-consuming equipment as the initial index. Step S32: Real-time acquisition of the air intake volume of downstream gas-consuming equipment and the inlet pressure of the bypass gas path; Step S33: Under the condition that the preset opening calibration conditions are met, control the opening change of the bypass control valve to determine the optimal opening. When the intake air volume is excessive, it means that the current intake air volume is too large and exceeds the intake air volume required for the downstream gas-consuming equipment to maintain the comprehensive index without deterioration under the current operating conditions. At this time, if the preset opening calibration conditions are met, the opening of the bypass control valve can be adjusted to test the maximum opening of the bypass control valve under the condition that the comprehensive index of the downstream gas-consuming equipment is not deteriorated. Step S34: Update the valve opening value corresponding to the operating condition data in the valve opening calibration data using the optimal opening value; The valve opening calibration data includes multiple sets of operating condition data and the valve opening value of the bypass control valve corresponding to each set of operating condition data; the multiple sets of operating condition data are preset in the valve opening calibration data. The preset opening calibration conditions include: detecting excessive air intake and the inlet pressure being within the preset gas storage pressure range; the optimal opening is the maximum opening of the bypass control valve while ensuring that the comprehensive performance of the downstream gas-using equipment is not inferior to the initial performance. The air inlet of the downstream air-consuming equipment is connected to the outlet of the air intake filtration system.

[0106] The downstream gas-consuming equipment includes, but is not limited to, gasoline or diesel engines. Correspondingly, the operating condition data includes, but is not limited to, engine speed and fuel quantity. It is understood that the operating condition data needs to be determined based on the specific operating parameters of the downstream gas-consuming equipment. Before calibration, multiple sets of operating condition data are pre-set in the valve opening calibration data to calibrate the available bypass control valve opening values ​​for the corresponding operating condition data. The specific organization form of the valve opening calibration data can be a table. As a specific embodiment, for example, the first column represents engine speed, the first row represents fuel quantity, and the cell at the intersection of each row and column is used to store the valve opening value corresponding to the operating condition data composed of the engine speed in that column and the fuel quantity in that row. The comprehensive index is used to evaluate the operating performance of downstream gas-consuming equipment. Different downstream gas-consuming equipment can determine the corresponding comprehensive index based on its own performance parameters. The comprehensive index may involve one or more performance parameters. A method to determine whether the comprehensive index has deteriorated is that the value of one or more performance parameters involved in the comprehensive index when the bypass control valve is open is better than or equal to the value of one or more performance parameters involved in the comprehensive index when the bypass control valve is closed. Another method to determine whether the comprehensive index has deteriorated is to obtain a weighted sum of the values ​​of one or more performance parameters involved in the comprehensive index when the bypass control valve is open, which is better than or equal to the value of one or more performance parameters involved in the comprehensive index when the bypass control valve is closed, by weighting and summing them in the same way. The term "better than" here refers to specific performance parameters or weighted sums, and can be greater than or less than. For example, regarding exhaust emissions, the statement that the exhaust emissions with the bypass control valve open are better than or equal to the exhaust emissions with the bypass control valve closed should be understood as the statement that the exhaust emissions with the bypass control valve open are less than or equal to the statement that the bypass control valve closed ... the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement that the bypass control valve closed is less than the statement For positive indicators, "better than or equal to" specifically means "greater than or equal to"; for negative indicators, "better than or equal to" specifically means "less than or equal to". When performing weighted summation, positive indicators use positive coefficients and negative indicators use negative coefficients. When comparing weighted summation values, "better than or equal to" should generally mean "greater than or equal to".

[0107] For example, taking an engine as an example, the comprehensive indicators include: power performance (e.g., torque), economy (e.g., fuel consumption), and / or emissions (e.g., the content of nitrogen oxides, carbon monoxide, and particulate matter in the exhaust gas), etc. However, the embodiments of this application are not limited to these, and any indicator used to compare the operating performance of downstream air-consuming equipment falls within the protection scope of this application. As a specific embodiment, when determining whether the comprehensive indicator has deteriorated, a weighted index can be obtained by weighted summing of the power performance, economy, and / or emissions indicators. The weighted index under the bypass control valve on condition is compared to whether it is greater than or equal to the weighted index under the bypass control valve off condition. If the weighted index under the bypass control valve on condition is greater than or equal to the weighted index under the bypass control valve off condition, then the corresponding comprehensive indicator has not deteriorated; otherwise, the corresponding comprehensive indicator has deteriorated. In some specific embodiments, the method for determining whether the intake air volume is excessive can be determined by calculating the air coefficient obtained by dividing the intake air volume of the downstream air-consuming equipment by the fuel consumption, and comparing the air coefficient with the air coefficient threshold recommended by the industry standard of the downstream air-consuming equipment. The calibration process is usually performed during the commissioning of the intake air filter system, so that a flow meter can be installed at the air inlet of the downstream air-consuming equipment in the intake air filter system to obtain the intake air volume.

[0108] This application embodiment enables the calibration of the bypass control valve opening value corresponding to multiple operating conditions. During normal operation of the intake air filtration system, the valve opening calibration data can be directly queried based on real-time operating conditions, or the valve opening value can be determined by interpolation of adjacent values. This simplifies the control process during normal operation and reduces the number of sensors required, such as flow meters and sensors for acquiring comprehensive indicators, thereby simplifying the system complexity during normal operation. It ensures that during the use of the intake air filtration system, the bypass control valve only opens to an appropriate degree to divert excess gas to the gas storage device when the pressure of the excess gas meets the gas storage conditions. This ensures that the gas storage device receives gas with pressures meeting the backflushing dust removal requirements without deteriorating the operating conditions of downstream gas-using equipment.

[0109] Furthermore, real-time acquisition of the intake air volume of downstream gas-consuming equipment and the inlet pressure of the bypass gas path also includes: real-time acquisition of the inlet temperature of the bypass gas path. The preset opening calibration conditions also include: the inlet temperature is less than or equal to the preset temperature threshold. The intake air filtration system also includes: a cooling device connected in series with the pressurized air path; and a bypass air path connected to the outlet side of the pressurized air path of the cooling device to guide gas from the outlet side of the cooling device to the air storage device.

[0110] This application embodiment can be used to calibrate a system with a bypass gas path set from the outlet side of the cooling device. This allows for the determination of the valve opening calibration value while simultaneously considering that the pressure and temperature of the gas obtained by the gas storage device are within a reasonable range. This ensures that during the use of the air intake filtration system, the bypass control valve will only open to an appropriate degree to divert excess gas to the gas storage device when the pressure and temperature of the excess gas meet the gas storage conditions. This ensures that the gas storage device can obtain gas that meets the backflushing dust removal requirements in terms of both pressure and temperature without causing deterioration of the operating conditions of downstream gas-using equipment.

[0111] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0112] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0114] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

[0115] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An air intake filtration system, characterized in that, include: At least one filter device, a pressurizing device, a pressurized air passage, an air storage device, a control unit, a bypass air passage, and a bypass control valve disposed in the bypass air passage are connected in parallel. Each filtration device is connected to the pressurizing device via an on / off air path to control whether the pressurizing device obtains clean gas from the corresponding filtration device; wherein, each filtration device is used to filter and output clean gas from the outside of the intake filtration system when connected to the pressurizing device. The booster device is connected to the outlet of the intake air filtration system through the boosted air passage, so that the gas boosted by the booster device is output from the outlet of the intake air filtration system through the boosted air passage; The inlet end of the bypass gas path is connected to the pressurized gas path, and the outlet end of the bypass gas path is connected to the gas storage device, so that when the bypass control valve is turned on, gas is diverted from the pressurized gas path and stored in the gas storage device. The gas storage device is connected to each filter device by a switchable air path, so as to control whether the gas storage device back-flushes the corresponding filter device for dust removal. The control unit is used to control the opening and closing of the air passage between each filtration device and the booster device and the gas storage device, and to obtain the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system. Based on the real-time operating conditions, the control unit controls the opening of the bypass control valve so as to divert gas from the booster air passage to the gas storage device while keeping the overall performance of the downstream gas-using equipment from deteriorating.

2. The intake filtration system as described in claim 1, characterized in that, Also includes: A cooling device is connected in series with the pressurized gas path; the bypass gas path is connected to the pressurized gas path on the outlet side of the cooling device to guide gas from the outlet side of the cooling device to the gas storage device.

3. The intake air filtration system as described in claim 2, characterized in that, The filtration device includes a first filtration device and a second filtration device; The first filtration device is connected to the pressurization device via an on / off gas path to control whether the pressurization device obtains clean gas from the first filtration device. The second filtration device is connected to the pressurizing device via an on / off gas path to control whether the pressurizing device obtains clean gas from the second filtration device; The booster device is connected to the outlet of the intake air filtration system through the boosted air path, and the cooling device is connected in series in the boosted air path so that the gas boosted by the booster device is cooled by the cooling device and then output through the outlet of the intake air filtration system. The bypass gas path is connected to the pressurized gas path on the outlet side of the cooling device to draw gas to the gas storage device during the opening of the bypass control valve; The gas storage device is connected to the first filter device via an openable and closed air passage to control whether the gas storage device back-flushes the first filter device to remove dust. The gas storage device is connected to the second filter device via an on / off air path to control whether the gas storage device backflushes the second filter device for dust removal.

4. The intake air filtration system as described in claim 1, 2, or 3, characterized in that, The control unit includes: An initialization module is used to configure at least one of the filter devices in the filter state and the remaining filter devices in the standby state when the air intake filter system is started. The gas storage control module is used to acquire the gas parameters at the inlet of the bypass gas path, determine whether the gas parameters meet the preset gas storage conditions, and control the bypass control valve to close if the gas parameters do not meet the preset gas storage conditions. Otherwise, it acquires the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system and controls the opening of the bypass control valve according to the real-time operating conditions, so as to divert gas from the pressurized gas path to the gas storage device while keeping the overall performance of the downstream gas-using equipment from deteriorating. The filter status monitoring module is used to acquire the operating parameters of the filter device for each filter status during the operation of the air intake filter system, determine whether the operating parameters meet the corresponding preset dust removal conditions of the filter device, and, if the operating parameters meet the preset dust removal conditions, designate the filter device as the first target filter device and trigger the backup control module. The backup control module is used to check whether there is a backup filter device. If a backup filter device is found, one filter device is selected from all the backup filter devices as the second target filter device, and the second target filter device is configured to filter. The pre-dust removal control module is used to configure the first target filter device to a dust removal state after the backup control module has been executed. The dust removal control module is used to check whether there are filter devices in the dust removal state. When a filter device in the dust removal state is detected, the module controls the air storage device to back-flush all filter devices in the dust removal state and configures the filter devices in the dust removal state that have completed dust removal as standby. The configuration for the filtration state includes controlling the corresponding filtration device to disconnect the air path from the air storage device and to connect the air path from the pressurization device, and marking the status of the corresponding filtration device as filtration state; the configuration for the standby state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as standby state; the configuration for the dust removal state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as dust removal state.

5. The intake air filtration system as described in claim 4, characterized in that, The gas storage control module is specifically used for: Obtain the gas parameters at the inlet of the bypass gas path and determine whether the gas parameters meet the preset gas storage conditions. If it is determined that the gas parameters do not meet the preset gas storage conditions, the bypass control valve is controlled to close. Otherwise, the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system are obtained, and the valve opening value corresponding to the real-time operating conditions is matched from the preset valve opening calibration data according to the real-time operating conditions. The opening of the bypass control valve is controlled to be the valve opening value, so as to divert gas from the pressurized gas path to the gas storage device. The valve opening calibration data pre-calibrates multiple sets of operating condition data and corresponding valve opening values ​​so that after the opening value of the bypass control valve is set to the corresponding valve opening value, the overall performance of the downstream gas-using equipment can be maintained without deterioration.

6. The intake filtration system as described in claim 5, characterized in that, The dust removal control module is specifically used for: Check if there are any filter devices in a dust removal state. If any filter devices in a dust removal state are found, obtain the gas storage status of the gas storage device for each filter device in a dust removal state, and determine whether the gas storage status meets the preset dust removal conditions. If the gas storage status meets the preset dust removal conditions, control the gas storage device to backflush the filter devices in a dust removal state, and configure the filter devices in a dust removal state that have completed dust removal as standby.

7. An intake air filter control method, adopted by the intake air filter system as described in any one of claims 1 to 3, characterized in that, include: When the intake filtration system is started, at least one of the filtration devices is configured to filtration mode, and the remaining filtration devices are configured to standby mode. The gas parameters at the inlet of the bypass gas path are obtained, and it is determined whether the gas parameters meet the preset gas storage conditions. If it is determined that the gas parameters do not meet the preset gas storage conditions, the bypass control valve is controlled to close. Otherwise, the real-time operating conditions of the downstream gas-using equipment of the intake air filtration system are obtained, and the opening of the bypass control valve is controlled according to the real-time operating conditions, so as to divert gas from the pressurized gas path to the gas storage device while keeping the comprehensive indicators of the downstream gas-using equipment from deteriorating. During the operation of the air intake filtration system, for each filtration state of the filtration device, the operating parameters of the filtration device are obtained, and it is determined whether the operating parameters meet the corresponding preset dust removal conditions of the filtration device. If it is determined that the operating parameters meet the preset dust removal conditions, the filter device is selected as the first target filter device, and it is checked whether there is a filter device in standby mode. If a filter device is found to be in standby mode, one filter device is selected from all the filter devices in standby mode as the second target filter device, and the second target filter device is configured to filter mode. Configure the first target filtration device to be dusted; Check if there are any filter devices in a state of needing dust removal. If a filter device in a state of needing dust removal is found, control the air storage device to back-flush all filter devices in a state of needing dust removal, and configure the filter devices in a state of needing dust removal that have completed dust removal as standby. The configuration for the filtration state includes controlling the corresponding filtration device to disconnect the air path from the air storage device and to connect the air path from the pressurization device, and marking the status of the corresponding filtration device as filtration state; the configuration for the standby state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as standby state; the configuration for the dust removal state includes controlling the corresponding filtration device to disconnect the air path from both the air storage device and the pressurization device, and marking the status of the corresponding filtration device as dust removal state.

8. The intake filter control method as described in claim 7, characterized in that, The process of acquiring the real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system, and controlling the opening of the bypass control valve based on the real-time operating conditions, so as to divert gas from the pressurized gas path to the gas storage device while maintaining the overall performance of the downstream air-consuming equipment from deterioration, specifically includes: The real-time operating conditions of the downstream air-consuming equipment of the intake air filtration system are obtained. Based on the real-time operating conditions, the valve opening value corresponding to the real-time operating conditions is matched from the preset valve opening calibration data. The opening of the bypass control valve is controlled to be the valve opening value so as to divert gas from the pressurized gas path to the gas storage device. The valve opening calibration data pre-calibrates multiple sets of operating condition data and corresponding valve opening values ​​so that after the opening value of the bypass control valve is set to the corresponding valve opening value, the overall performance of the downstream gas-using equipment can be maintained without deterioration.

9. A method for calibrating a bypass control valve, used to calibrate the intake air filtration system as described in claim 1, characterized in that, include: For each set of operating condition data in the valve opening calibration data, the bypass control valve is controlled to close, the operating condition of the downstream air-consuming equipment of the air intake filter system is configured according to the operating condition data, and the current comprehensive index of the downstream air-consuming equipment is obtained and recorded as the initial index. The intake volume of the downstream gas-consuming equipment and the inlet pressure of the bypass gas path are acquired in real time. Under the condition that the preset opening calibration is met, the opening of the bypass control valve is controlled to determine the optimal opening. Update the valve opening value corresponding to the operating condition data in the valve opening calibration data using the optimal opening degree; The valve opening calibration data includes multiple sets of operating condition data and the valve opening value of the bypass control valve corresponding to each set of operating condition data; the multiple sets of operating condition data are preset in the valve opening calibration data. The preset opening calibration conditions include: detecting that the intake volume is excessive and that the inlet pressure is within the preset gas storage pressure range; The optimal opening degree is the maximum opening degree of the bypass control valve while ensuring that the comprehensive performance of the downstream gas-consuming equipment is not inferior to the initial performance. The air inlet of the downstream air-consuming equipment is connected to the outlet of the air intake filtration system.

10. The bypass control valve calibration method as described in claim 9, characterized in that, The real-time acquisition of the intake air volume of the downstream gas-consuming equipment and the inlet pressure of the bypass gas path also includes: real-time acquisition of the inlet temperature of the bypass gas path. The preset opening calibration conditions also include: the inlet temperature is less than or equal to a preset temperature threshold. The intake filtration system further includes: a cooling device connected in series with the pressurized air path; and a bypass air path connected to the pressurized air path at the outlet side of the cooling device to guide gas from the outlet side of the cooling device to the air storage device.

Images