A non-powered multi-working-condition air control device and method

Abstract

The application discloses a kind of unpowered multi-working-condition air control device and method.The device includes shell, air valve blade in the air duct in shell, drive part for driving air valve blade rotation and main control part integrated with differential pressure sensing chip.Main control part has angle, air volume, voltage and pressure four kinds of control logic, can be flexibly selected according to actual working condition and adaptively adjust air valve blade angle, to realize the accurate, stable control of air volume.The application uses "sliding window + extreme value elimination + mean fusion" algorithm to realize high-frequency stable measurement of air volume, supports multi-unit collaborative work and air volume automatic distribution, has parameter memory and fault diagnosis function, and has the advantages of simple structure, fast response, strong adaptability, high reliability and the like.

Description

Technical Field

[0001] This invention relates to a non-powered multi-condition air control device and a corresponding non-powered multi-condition air control method, belonging to the field of air conditioning technology. Background Technology

[0002] In air conditioning and ventilation systems, precise airflow control is crucial for ensuring indoor air quality and energy efficiency. Traditional fresh air systems typically determine the required airflow based on the number of people in the target area and adjust the air supply equipment to match the actual airflow with the demand. However, this approach is essentially a single, quantitative control method, which is ill-suited to the complex needs of different usage scenarios, environmental changes, and multi-area coordinated ventilation.

[0003] Currently, most common airflow control devices use manual or simple electric dampers. Their control process often relies on manual intervention or external power, resulting in limited adjustment accuracy, slow response, and an inability to achieve adaptive airflow matching based on real-time operating conditions. Especially in practical applications such as simultaneous supply and exhaust airflow and independent airflow control in multiple rooms, existing systems lack a unified coordination and dynamic allocation mechanism, which can easily lead to disordered airflow organization, localized over- or under-airflow, resulting in energy waste and decreased comfort.

[0004] Furthermore, existing ventilation control equipment generally has limited functionality and lacks multi-mode switching and intelligent diagnostic capabilities. When system anomalies occur, it often fails to autonomously identify the fault type and implement protective measures, causing inconvenience for system operation and maintenance and reducing overall reliability. Therefore, achieving high-precision, multi-condition adaptive airflow regulation with collaborative control and anomaly handling capabilities without continuous external power input has become a critical technical bottleneck that urgently needs to be overcome in this field. Summary of the Invention

[0005] The primary technical problem to be solved by this invention is to provide a non-powered multi-condition air control device.

[0006] Another technical problem to be solved by the present invention is to provide a non-powered multi-condition wind control method.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] According to a first aspect of the present invention, a non-powered multi-condition air control device is provided, comprising:

[0009] An outer casing, wherein an air duct is formed within the outer casing;

[0010] The damper blades are rotatably disposed within the air duct and are used to adjust the opening size of the air duct.

[0011] A drive unit, connected to the air valve blade, is used to drive the air valve blade to rotate;

[0012] The main control unit is electrically connected to the drive unit and integrates a differential pressure sensing chip, a communication interface, and a voltage input interface. The main control unit has multiple control logics and controls the drive unit to rotate based on any one of the control logics, so as to drive the air valve blades to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing automatic adjustment of air volume without power.

[0013] The various control logics include at least the following:

[0014] Angle control logic is used to directly control the blade angle of the air valve blades;

[0015] The air volume control logic dynamically controls the blade angle of the air valve blades through a preset air volume value, so that the actual air volume value is stabilized within the first fluctuation range of the preset air volume value.

[0016] The voltage control logic dynamically controls the blade angle of the damper blades through a preset voltage value, so that the actual air volume value is stabilized within the second fluctuation range of the converted air volume value; wherein, different preset voltage values ​​correspond to different converted air volume values.

[0017] The pressure control logic dynamically controls the blade angle of the air valve by using the pressure difference between the current external pressure and the preset external pressure, so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure.

[0018] Preferably, the angle control logic includes:

[0019] The manually set blade angle is received through the communication interface;

[0020] The drive unit is controlled to rotate according to the blade angle until the air valve blade is adjusted to the blade angle.

[0021] Preferably, the air volume control logic includes:

[0022] Receive a preset airflow value through the communication interface;

[0023] The internal pressure of the air duct is detected in real time by the differential pressure sensing chip;

[0024] Based on a pre-trained model of the relationship between air volume, internal pressure, and angle, the blade angle of the air valve is dynamically adjusted so that the actual air volume value is stabilized within the first fluctuation range of the preset air volume value.

[0025] Preferably, the voltage control logic includes:

[0026] The input voltage value is obtained through the voltage input interface;

[0027] The input voltage value is converted into the corresponding converted air volume value;

[0028] The internal pressure of the air duct is detected in real time by the differential pressure sensing chip;

[0029] Based on a pre-trained model of the relationship between air volume, internal pressure, and angle, the blade angle of the air valve is dynamically adjusted so that the actual air volume value is stabilized within the second fluctuation range of the converted air volume value.

[0030] Preferably, the pressure control logic includes:

[0031] The external pressure sensor detects the current external pressure and obtains the pressure difference value in real time based on the preset external pressure.

[0032] The rotation trend of the valve blades is obtained based on the pressure difference value;

[0033] The internal pressure of the air duct is detected in real time by the differential pressure sensing chip;

[0034] Under the rotation trend, based on the pre-trained airflow-internal pressure-angle relationship model, the blade angle of the air valve is dynamically adjusted so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure.

[0035] Preferably, the outer shell, the air valve blades, and the drive unit together constitute an air control unit, and the non-powered multi-condition air control device includes multiple air control units, each of which is electrically connected to the main control unit.

[0036] The main control unit also includes a DIP switch, which is used to set any one of the air control units as an air supply unit or an air exhaust unit, and to control the blade angle of each air control unit through the communication interface, so as to control the required air volume of each air control unit.

[0037] Preferably, the main control unit further includes a parameter memory module for saving operating parameters after a power outage and automatically restoring them after a restart;

[0038] The main control unit also includes an anomaly detection module, which is used to monitor abnormal states during device operation and indicate the fault type through fault codes.

[0039] According to a second aspect of the present invention, a non-powered multi-condition air control method is provided, which is implemented using the aforementioned non-powered multi-condition air control device, and specifically includes the following steps:

[0040] S1: Based on different operating conditions, the main control unit can select any one of the multiple control logics from various control logics;

[0041] S2: Based on the selected control logic, the main control unit controls the drive unit to rotate, thereby driving the air valve blades to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing automatic adjustment of air volume without power.

[0042] Preferably, the method further includes the following steps before step S1:

[0043] If the air control device includes multiple air control units, the type of any one of the air control units can be preset via a DIP switch;

[0044] Based on the type of each air control unit, load the corresponding operating parameters;

[0045] The differential pressure sensing chips of each of the aforementioned air control units are initialized, and the blade angle of the air valve blades is controlled to be zero, in preparation for the next step of selecting the control logic of the main control unit.

[0046] The outer shell, the air valve blades, and the drive unit together constitute an air control unit. The non-powered multi-condition air control device includes multiple air control units, and each air control unit is electrically connected to the main control unit.

[0047] The main control unit also includes a DIP switch, which is used to set any one of the air control units as an air supply unit or an air exhaust unit, and synchronously control the blade angle of each air control unit through the communication interface to achieve uniform air volume distribution.

[0048] Preferably, the non-powered multi-condition air control method further includes:

[0049] During the operation of the device, the abnormal status of the non-powered multi-condition air control device is continuously monitored;

[0050] If no abnormality is found, monitoring will continue; if an abnormality is found, the fault type will be indicated by a fault code.

[0051] The protection strategy is executed based on the fault type, and after the protection strategy is completed, the abnormal status of the non-powered multi-condition air control device is re-monitored.

[0052] Compared with the prior art, the present invention has the following technical effects:

[0053] (1) It realizes multi-mode intelligent control, and can flexibly select angle, air volume, voltage or pressure control logic according to actual working conditions, which is highly adaptable.

[0054] (2) By combining high-precision drive components with a pre-trained model, stable air volume regulation is achieved, with high control accuracy and fast response speed.

[0055] (3) It supports the collaborative operation of multiple air control units, has automatic air volume distribution and fault unit shielding functions, and the system is highly robust.

[0056] (4) It has parameter memory and anomaly detection functions, which improves the reliability and maintainability of the system.

[0057] (5) The overall structure is simple, requires no external power drive, is energy-saving and environmentally friendly, and is suitable for a variety of ventilation scenarios. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the structure of a non-powered multi-condition air control device provided in an embodiment of the present invention;

[0059] Figure 2 This is a structural diagram of the main control unit in an embodiment of the present invention;

[0060] Figure 3 This is a schematic diagram of the connection structure between the main control unit and multiple air control units in an embodiment of the present invention;

[0061] Figure 4 This is an overall flowchart of a non-powered multi-condition wind control method provided in an embodiment of the present invention;

[0062] Figure 5A This is a partial flowchart illustrating a non-powered multi-condition wind control method provided in an embodiment of the present invention.

[0063] Figure 5B To and Figure 5A The corresponding detailed flowchart. Detailed Implementation

[0064] The technical content of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0065] like Figure 1 As shown, this embodiment of the invention provides a non-powered multi-condition air control device, including a housing 1, a damper blade 2, a drive unit 3, and a main control unit 4. The housing 1, damper blade 2, and drive unit 3 together constitute an air control unit (which can be either a supply air unit or an exhaust air unit). The main control unit 4 has multiple control logics, thereby dynamically controlling the blade angle of the damper blade 2 according to the selected control logic, and thus controlling whether the air control unit supplies or exhausts air, to achieve automatic non-powered adjustment of airflow.

[0066] Specifically, the outer casing 1 has an air outlet 101 and an air inlet 102, forming an air duct 103 between the air outlet 101 and the air inlet 102. It is understood that the larger the size of the outer casing, the larger the air duct 103, and correspondingly, the wider the range of airflow it can accommodate. In one embodiment of the invention, the outer casing 1 includes three sizes: 120×120mm, 200×150mm, and 300×150mm, respectively adaptable to airflow ranges of 30–500 m³ / h. 3 / h, 50~1000m 3 / h, 100~1600m 3 / h. In other embodiments, the specific shape and size of the housing 1 can be adapted as needed, and are not specifically limited here.

[0067] like Figure 1 As shown, the damper blade 2 is rotatably disposed within the air duct 103 to adjust the opening size of the air duct 103. In this embodiment, when the damper blade 2 is in a vertical state, the air duct 103 is completely closed; when the damper blade 2 is in a horizontal state, the air duct 103 is completely open. Furthermore, the drive unit 3 is connected to the damper blade 2 and is used to drive the damper blade 2 to rotate. Preferably, the drive unit 3 is a claw-pole permanent magnet synchronous geared motor, DC24V, with a rated power of 6W. It should be noted that in this embodiment, the final execution of all control logic (angle, airflow, voltage, pressure) is reflected in the rotation angle of the damper blade 2, and the accuracy of the drive unit 3 control directly depends on the accuracy of the angle control. Using a claw-pole permanent magnet synchronous geared motor is equivalent to a "mechanical prescaler." Assuming a reduction ratio of 60:1, the motor shaft rotates 60 times for the output shaft to rotate only 1 time (360°), which means that the control accuracy of the output shaft angle is improved by 60 times. Understandably, by "amplifying" the tiny rotation of the motor into a fine angular change in the output shaft, stable regulation of airflow can be achieved.

[0068] like Figure 1 As shown, the main control unit 4 is located inside the housing 1 and is electrically connected to the drive unit 3, thereby controlling the drive unit 3. Figure 2As shown, the main control unit 4 integrates a differential pressure sensor chip 41, a communication interface 42, and a voltage input interface 43. The differential pressure sensor chip 41 is essentially part of the main control unit 4 and can directly participate in the execution of various subsequent control logics. However, both the communication interface 42 and the voltage input interface 43 require external functional components to enable the main control unit 4 to work with these components to perform multi-mode logic control on the drive unit 3. Therefore, the main control unit 4 can control the rotation of the drive unit 3 based on any control logic and feed back the rotation angle of the drive unit 3 to the main control unit 4 via the potentiometer 301. This causes the damper blades 2 to adaptively adjust their angle, thereby changing the opening size of the air duct and achieving automatic, unpowered airflow adjustment.

[0069] Specifically, the main control unit 4 has at least four types of control logic: angle control logic, airflow control logic, voltage control logic, and pressure control logic. The following provides a detailed explanation of each of these four control logics:

[0070] (1) Angle control logic

[0071] This angle control logic is used to directly control the blade angle of the damper blades. Specifically, it receives a preset blade angle value (e.g., blade angle 30°) via communication interface 42. Figure 1 As shown, the angle of the damper blade 2 when it is in a vertical state is defined as 0°. Correspondingly, the angle adjustment range of the damper blade 2 is 0 to 90°. The larger the angle of the damper blade 2, the larger the opening of the air duct 103.

[0072] Upon receiving the blade angle, the main control unit 4 controls the drive unit 3 to rotate until the air valve blade 2 is adjusted to the specified blade angle (i.e., 30°). It is understood that this adjustment mode is manual, allowing the user to freely adjust the blade angle according to the required airflow.

[0073] (2) Air volume control logic

[0074] The air volume control logic dynamically controls the blade angle of the air valve blade 2 by setting a preset air volume value, so that the actual air volume value is stable within the first fluctuation range of the preset air volume value.

[0075] Specifically, it includes the following steps:

[0076] ① Receive the preset air volume value through communication interface 42.

[0077] ② The internal pressure of the air duct 103 is detected in real time by the differential pressure sensor chip 41.

[0078] ③ Based on the pre-trained air volume-internal pressure-angle relationship model, the blade angle of the damper is dynamically adjusted so that the actual air volume value is stabilized within the first fluctuation range of the preset air volume value (e.g., stabilized within ±5% of the preset air volume value).

[0079] The air volume-internal pressure-angle relationship model is trained using a pre-calibrated dataset. By detecting the internal pressure of the air duct 103 in real time, the actual air volume value corresponding to the internal pressure is determined. Then, based on the difference between the real-time air volume value and the preset air volume value, the drive unit 3 is controlled to rotate the air valve blade 2 to increase the blade angle (when the real-time air volume value is less than the preset air volume value) or decrease the blade angle (when the real-time air volume value is greater than the preset air volume value), so that the actual air volume value is stabilized within ±5% of the preset air volume value.

[0080] (3) Voltage control logic

[0081] The voltage control logic dynamically controls the blade angle of the damper blades by setting a preset voltage value, so that the actual air volume value is stabilized within the second fluctuation range of the converted air volume value; different preset voltage values ​​correspond to different converted air volume values.

[0082] In this embodiment, both the voltage control logic and the airflow control logic are actually for controlling airflow. The difference is that the voltage control logic first needs to obtain the input voltage value through the voltage input interface 43 and convert the input voltage value into the corresponding converted airflow value. This converted airflow value is functionally equivalent to the preset airflow value in the airflow control logic. Then, through similar airflow control logic, the actual airflow value is stabilized within the second fluctuation range of the converted airflow value (e.g., stabilized within ±5% of the converted airflow value).

[0083] In this embodiment, the voltage input through voltage input interface 43 is 0-10V, and the voltage value must be greater than 0. 10V corresponds to the maximum airflow. The output voltage value can be converted into a corresponding converted airflow value according to a preset linear relationship; for example, 10V corresponds to 500m³ / h. 3 / h, 5V corresponds to 250 m 3 / h. Of course, in other embodiments, nonlinear relationship transformation methods (e.g., quadratic functions, exponential functions, logarithmic functions, etc.) can also be used, and no specific limitation is made here.

[0084] (4) Pressure control logic

[0085] The pressure control logic dynamically controls the blade angle of the damper blade 2 by using the pressure difference between the current external pressure and the preset external pressure, so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure.

[0086] Specifically, it includes the following steps:

[0087] ① The external pressure sensor detects the current external pressure of the external environment and obtains the pressure difference value in real time based on the preset external pressure (positive pressure / negative pressure).

[0088] ② The rotation trend of the damper blade 2 is obtained based on the pressure difference value, wherein the rotation trend is either a decrease in blade angle or an increase in blade angle. Furthermore, if the air control unit is an air supply unit, the positive pressure is increased by increasing the blade angle; conversely, if the air control unit is an exhaust unit, the negative pressure is increased by increasing the blade angle.

[0089] ③ The internal pressure of the air duct 103 is detected in real time by the differential pressure sensor chip 41.

[0090] ④ Under this rotation trend, based on the pre-trained air volume-internal pressure-angle relationship model, the blade angle of the air valve blade 2 is dynamically adjusted so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure (e.g., the deviation does not exceed 3Pa).

[0091] Understandably, this pressure control logic requires the differential pressure sensing chip 41 and an external pressure sensor to work together. The external pressure sensor is used to acquire the rotation trend of the damper blade 2 to control its overall direction; the internal pressure sensor 41 acquires the internal pressure of the duct and uses a relational model to control the rotation angle of the damper blade 2 in detail. Thus, through the coordinated operation of the overall and detailed control, precise control of the damper blade 2 is achieved.

[0092] Furthermore, it should be noted that the non-powered multi-condition air control device is equipped with total pressure and static pressure sampling ports 46, which are connected to the pressure sensing chip 41 on the main control unit 4 via pipelines. Thus, the pressure sensing chip 41 collects analog signals of total pressure and static pressure in real time, with a sampling frequency set to collect one set of data every 300 milliseconds. Extensive experimental verification has shown that data collected in a single instance is easily affected by instantaneous airflow fluctuations within the duct and airflow disturbances in the pipeline, resulting in data dispersion. Direct use of this data would lead to insufficient stability of the measurement results. If stability is improved simply by increasing the number of sampling sets and averaging, the data update cycle would be significantly prolonged, failing to meet real-time control requirements.

[0093] To resolve the aforementioned technical contradiction between stability and real-time performance, this invention independently developed a logical algorithm combining a sliding window, extreme value removal, and mean fusion. The specific implementation process is as follows: The pressure sensing chip 41 continuously collects data at a frequency of 300 milliseconds per set. The system constructs a sliding window of 100 sets of data. After each new set of data is collected, the oldest set of data within the window is automatically removed, retaining the latest 100 sets of valid data. These 100 sets of data are preprocessed, removing one maximum and one minimum value to eliminate interference from extreme outliers. The mean of the remaining 98 sets of valid data is calculated to obtain the stable measured values ​​of total pressure and static pressure at the current moment. Through this algorithm design, the data update cycle of over 30 seconds caused by traditional cumulative mean calculation is compressed to 300 milliseconds, synchronized with the sampling frequency. While ensuring data anti-interference capability and stability, high-frequency real-time output of total pressure and static pressure values ​​is achieved.

[0094] After reading the total pressure and static pressure data optimized by the above-mentioned independent algorithm, the main control unit 4 first calculates the real-time dynamic pressure value P in the air duct 103 accurately according to the core principle of fluid mechanics (dynamic pressure = total pressure - static pressure); then substitutes it into the theoretical air volume calculation formula V1 = √(2P / ρ) (where V1 is the theoretical calculated air volume value, ρ is the density of the fluid medium, based on the preset initial value of standard working conditions, which can be dynamically corrected according to the actual ambient temperature and humidity) to obtain preliminary air volume data.

[0095] To further eliminate systematic errors caused by the discrepancy between theoretical models and actual application scenarios (such as local duct resistance, fluid viscosity loss, and the impact of environmental temperature and humidity changes on medium density), this invention establishes an airflow calibration mechanism through a laboratory calibration process: Under standard experimental conditions, professional-grade airflow testing equipment (accuracy level conforming to GB / T 1236-2017 Test Method for Aerodynamic Performance of Ventilation Fans) is used to conduct multiple parallel tests on the device under different operating conditions (such as different wind speeds and different duct resistances) to obtain the standard airflow value V2 under the corresponding operating conditions; by fitting and analyzing multiple sets of V1 and V2 data, a dynamic mapping relationship of airflow calibration coefficient K = V2 / V1 is established to form a calibration database.

[0096] During actual operation, the main control unit 4 will call the corresponding calibration coefficient K according to the current operating conditions (such as dynamic pressure range and environmental parameters) to correct the theoretically calculated air volume value V1 in real time (final air volume value V = V1 × K). This will ultimately achieve real-time air volume measurement with high frequency response (300 milliseconds / update), high stability and high accuracy, providing accurate and reliable data support for the core control logic of the device (such as wind speed adjustment and wind pressure matching).

[0097] In contrast, the external pressure sensor mentioned in the "Pressure Control Logic" section of this embodiment is a commercially available differential pressure sensor. It typically uses two pressure measuring tubes to detect the static pressure of two environments (such as indoor and outdoor) and directly outputs a digital or analog signal representing the static pressure difference.

[0098] Based on the above technical design, the core innovation of this invention lies in breaking through the functional limitation of "single static pressure difference detection" of traditional commercially available differential pressure sensors, and integrating its core detection logic into the main control unit 4 through independent research and development. Compared to commercially available differential pressure sensors that can only indirectly output the static pressure difference between two environments, this invention, through its integrated design of "total pressure / static pressure sampling port + universal pressure sensing chip + self-developed algorithm + laboratory calibration," not only achieves significant cost optimization by replacing module-level solutions with chip-level solutions (reducing the procurement cost from approximately 200 yuan for commercially available sensors to approximately 20 yuan for chip-level sensors, a cost reduction of 90%), but also achieves performance upgrades through three technological breakthroughs: First, the "sliding window + extreme value elimination + mean fusion" algorithm solves the core contradiction between high-frequency sampling and data stability, achieving real-time data updates at the 300-millisecond level; Second, it breaks through the limitation of commercially available sensors that can only detect static pressure differences, directly acquiring the raw data of total pressure and static pressure within the duct, and then deriving dynamic pressure and real-time airflow, resulting in a more comprehensive measurement dimension; Third, the dynamic calibration mechanism established by multi-condition calibration in the laboratory effectively offsets environmental interference and system errors, resulting in measurement accuracy significantly superior to traditional commercially available sensors. Ultimately, the embodiments of the present invention achieve the triple technical goals of "high-frequency response, stable output, and accurate measurement" while significantly reducing hardware costs. This provides more comprehensive and reliable multi-dimensional data support for the core control logic of the device, such as wind speed regulation and wind pressure matching, thus balancing economic efficiency and technological advancement.

[0099] Furthermore, it should be noted that the 100 sets of data in the above test is only one specific implementation method; other embodiments may use 50, 80, 150, 200 sets, etc. This application found that measuring 50 sets of data is faster, but the data is unstable. Measuring 200 sets of data, while more stable than 100 sets, takes longer. Considering the application requirements of a room setting, 100 sets of data is considered faster and more stable. In practical applications, users can set the number of measurement sets according to specific environmental requirements.

[0100] The air volume calibration coefficient K mentioned in the above embodiments is not a fixed value. The embodiments of the present invention have three specifications and models with air volumes of 500, 1000, and 1600. Since the air volume specifications of the products have different airflow area designs, their corresponding air volume calibration coefficient K also needs to be matched and set separately according to the product specifications.

[0101] In the above embodiments, preferably, the non-powered multi-condition air control device includes multiple air control units, each of which is electrically connected to the main control unit 4. Accordingly, as... Figure 2 and Figure 3 As shown, the main control unit also includes a DIP switch 44, used to set any one of the air control units as an air supply unit or an air exhaust unit, and synchronously control the blade angle of each air control unit through the communication interface 42 to perform uniform or personalized airflow distribution (e.g., different rooms require different airflow), thereby achieving coordinated control of multiple air control units used in combination. If an air control unit malfunctions, the malfunctioning unit is disabled and the airflow is redistributed.

[0102] In the above embodiments, more preferably, the main control unit 4 further includes a parameter memory and anomaly detection module 45. This module 45 is used to save operating parameters (e.g., current operating mode, airflow / pressure setpoints, etc.) after a power outage and automatically restore them upon restart. Furthermore, this module 45 also monitors abnormal states during device operation and indicates the fault type through fault codes (e.g., E01 for airflow angle fault), thereby facilitating quick location of the fault area by maintenance personnel and improving maintenance efficiency.

[0103] like Figure 4 , Figure 5A and Figure 5B As shown, based on the above embodiments, this invention also provides a non-powered multi-condition air control method, specifically including the following steps:

[0104] S0: Set the type of each air control unit.

[0105] Specifically, if the air control device includes multiple air control units, the type of any one of the air control units is preset via the DIP switch 44 (i.e., each air control unit is set as an air supply unit or an air exhaust unit). Then, based on the type of each air control unit, the corresponding operating parameters are loaded. Finally, the differential pressure sensing chip 41 of each air control unit is initialized, and the blade angle of the damper blade 2 is controlled to be zero, in preparation for entering the control logic of the main control unit 4 in step S1.

[0106] It is understandable that if the air control device has only one air control unit, step S0 can be omitted and the process can proceed directly to step S1.

[0107] S1: Based on different operating conditions, the main control unit 4 selects any one of the four control logics mentioned above.

[0108] S2: Based on the selected control logic, the main control unit 4 controls the drive unit 3 to rotate, thereby driving the air valve blade 2 to adaptively adjust the blade angle, thereby changing the opening size of the air duct 103 and realizing automatic adjustment of air volume without power.

[0109] Furthermore, preferably, the non-powered multi-condition wind control method also includes:

[0110] S3: Anomaly detection.

[0111] Specifically, during the operation of the device, the abnormal status of the non-powered multi-condition air control device is continuously monitored. If no abnormality is found, monitoring continues; if an abnormality is found, a fault code is used to indicate the fault type. Furthermore, based on the indicated fault type, the corresponding protection strategy is executed, and after the protection strategy is completed, the abnormal status of the non-powered multi-condition air control device is re-monitored, forming a closed-loop monitoring logic.

[0112] It should be noted that the above embodiments are merely illustrative examples. The technical solutions of each embodiment can be combined, and all are within the protection scope of this invention.

[0113] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0114] The above provides a detailed description of the non-powered multi-condition air control device and method provided by the present invention. Any obvious modifications made by those skilled in the art without departing from the essence of the present invention will constitute an infringement of the patent rights of the present invention and will incur corresponding legal liability.

Claims

1. A non-powered multi-condition air control device, characterized in that... include: An outer casing, wherein an air duct is formed within the outer casing; The damper blades are rotatably disposed within the air duct and are used to adjust the opening size of the air duct. A drive unit, connected to the air valve blade, is used to drive the air valve blade to rotate; The main control unit is electrically connected to the drive unit and integrates a differential pressure sensing chip, a communication interface, and a voltage input interface. The main control unit has multiple selectable control logics and controls the rotation of the drive unit based on any one of the control logics. It also feeds back the rotation angle of the drive unit to the main control unit through a potentiometer, so as to drive the damper blades to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing automatic adjustment of air volume without power. The various control logics include at least the following: Angle control logic is used to directly control the blade angle of the air valve blades; The air volume control logic dynamically controls the blade angle of the air valve blades through a preset air volume value, so that the actual air volume value is stabilized within the first fluctuation range of the preset air volume value. The voltage control logic dynamically controls the blade angle of the damper blades through a preset voltage value, so that the actual air volume value is stabilized within the second fluctuation range of the converted air volume value; wherein, different preset voltage values ​​correspond to different converted air volume values. The pressure control logic determines the rotation trend of the damper blades based on the pressure difference between the current external pressure and the preset external pressure. It also detects the internal pressure of the duct in real time through the differential pressure sensor chip and dynamically controls the blade angle of the damper blades by combining a pre-trained airflow-internal pressure-angle relationship model, so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure. The differential pressure sensing chip collects raw pressure data in the air duct at a frequency of 300 milliseconds per set. The main control unit performs the following data processing steps to obtain a stable pressure value for control: constructing a sliding window containing 100 sets of data; removing the oldest set of data in the window whenever a new set of data is added; performing extreme value removal processing on the data in the window; calculating the mean of the 98 sets of valid data after processing, and outputting the calculation result.

2. The non-powered multi-condition air control device as described in claim 1, characterized in that... The angle control logic includes: The preset blade angle value is received through the communication interface; The drive unit is controlled to rotate according to the blade angle until the air valve blade is adjusted to the blade angle.

3. The non-powered multi-condition air control device as described in claim 1, characterized in that... The airflow control logic includes: Receive the preset airflow value through the communication interface; The internal pressure of the air duct is detected in real time by the differential pressure sensing chip; Based on a pre-trained model of the relationship between air volume, internal pressure, and angle, the blade angle of the air valve is dynamically adjusted so that the actual air volume value is stabilized within the first fluctuation range of the preset air volume value.

4. The non-powered multi-condition air control device as described in claim 1, characterized in that... The voltage control logic includes: The input voltage value is obtained through the voltage input interface; The input voltage value is converted into the corresponding converted air volume value; The internal pressure of the air duct is detected in real time by the differential pressure sensing chip; Based on a pre-trained model of the relationship between air volume, internal pressure, and angle, the blade angle of the air valve is dynamically adjusted so that the actual air volume value is stabilized within the second fluctuation range of the converted air volume value.

5. The non-powered multi-condition air control device as described in claim 1, characterized in that: The outer casing, the air valve blades, and the drive unit together constitute an air control unit. The non-powered multi-condition air control device includes multiple air control units, and each air control unit is electrically connected to the main control unit. The main control unit also includes a DIP switch, which is used to set any one of the air control units as an air supply unit or an air exhaust unit, and to control the blade angle of each air control unit through the communication interface, so as to control the required air volume of each air control unit.

6. The non-powered multi-condition air control device as described in claim 1, characterized in that: The main control unit also includes a parameter memory module, which is used to save the operating parameters after a power failure and automatically restore them after a restart; The main control unit also includes an anomaly detection module, which is used to monitor abnormal states during device operation and indicate the fault type through fault codes.

7. A non-powered multi-condition air control method, implemented using the non-powered multi-condition air control device according to any one of claims 1 to 6, characterized in that... Includes the following steps: S1: Based on different operating conditions, the main control unit can select any one of the multiple control logics; S2: Based on the selected control logic, the main control unit controls the drive unit to rotate, thereby driving the air valve blades to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing automatic adjustment of air volume without power.

8. The non-powered multi-condition air control method as described in claim 7, characterized in that... The procedure preceding step S1 also includes: If the non-powered multi-condition air control device includes multiple air control units, the type of any one of the air control units can be preset by a DIP switch. Based on the type of each air control unit, load the corresponding operating parameters; The differential pressure sensing chips of each of the aforementioned air control units are initialized, and the blade angle of the air valve blades is controlled to be zero, in preparation for the next step of selecting the control logic of the main control unit. The outer shell, the air valve blades, and the drive unit together constitute an air control unit. The non-powered multi-condition air control device includes multiple air control units, and each air control unit is electrically connected to the main control unit. The main control unit also includes a DIP switch, which is used to set any one of the air control units as an air supply unit or an air exhaust unit, and synchronously control the blade angle of each air control unit through the communication interface to achieve uniform air volume distribution.

9. The non-powered multi-condition air control method as described in claim 8, characterized in that... Also includes: During the operation of the device, the abnormal status of the non-powered multi-condition air control device is continuously monitored; If no abnormality is found, monitoring will continue; if an abnormality is found, the fault type will be indicated by a fault code. The protection strategy is executed based on the fault type, and after the protection strategy is completed, the abnormal status of the non-powered multi-condition air control device is re-monitored.

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