Unpowered multi-working-condition air control device and method

Abstract

The invention discloses an unpowered multi-working-condition air control device and method. The device comprises a shell, an air valve blade arranged in an air duct in the shell, a driving part for driving the air valve blade to rotate and a main control part integrated with a pressure difference sensing chip. The main control part has four control logics of angle, air volume, voltage and pressure, and can flexibly select and adaptively adjust the blade angle of the air valve according to actual working conditions, so that the accurate and stable control of the air volume is realized. The air volume high-frequency stable measurement is realized by adopting a sliding window + extreme value elimination + mean value fusion algorithm, multi-unit cooperative work and air volume automatic distribution are supported, the parameter memory and fault diagnosis functions are realized, and the air volume high-frequency stable measurement device has the advantages of simple structure, fast response, strong adaptability, high reliability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of unpowered multi-condition air control device, also relates to corresponding unpowered multi-condition air control method, belongs to air conditioning technical field. BACKGROUND

[0002] In air conditioning and ventilation system, the accurate control of air volume is the core link to ensure indoor air quality and energy saving effect. The traditional fresh air system is usually based on the detection target area number to determine the required air volume, and the actual air volume is matched with the demand by adjusting the air supply equipment. However, this method is essentially still a single quantitative control, which is difficult to adapt to the complex needs of different use scenarios, environmental changes and multi-region collaborative ventilation.

[0003] At present, the common air volume regulating device mostly uses manual or simple electric air valve, and its control process often depends on manual intervention or external power driving, which not only has limited regulating accuracy and slow response, but also cannot realize self-adaptive air volume matching according to real-time working conditions. Especially in the face of the coexistence of air supply and exhaust, multi-room independent air control and other practical applications, the existing system lacks unified coordination and dynamic allocation mechanism, which easily leads to airflow organization disorder, local overwind or underwind, causing energy waste and comfort decline.

[0004] In addition, the existing ventilation control equipment is generally single-function, without multi-mode switching and intelligent diagnosis capability. When the system is abnormal, it often cannot identify the fault type and take protective measures independently, which brings inconvenience to system operation and maintenance and reduces the overall reliability. Therefore, how to realize high-precision, multi-condition adaptive air volume regulation with collaborative control and abnormal processing capability without continuous external power input has become a technical bottleneck to be broken through in the field. SUMMARY

[0005] The primary technical problem to be solved by the present application is to provide an unpowered multi-condition air control device.

[0006] Another technical problem to be solved by the present application is to provide an unpowered multi-condition air control method.

[0007] To achieve the above technical purposes, the present application adopts the following technical solutions: According to the first aspect of the embodiment of the present application, an unpowered multi-condition air control device is provided, comprising: A housing, a wind channel is formed in the housing; An air valve blade is rotatably arranged in the wind channel for adjusting the opening size of the wind channel; A driving part is connected with the air valve blade for driving the air valve blade to rotate; The main control part is electrically connected with the driving part and is integrated with a differential pressure sensing chip, a communication interface and a voltage input interface; the main control part has multiple control logics and controls the driving part to rotate based on any one of the control logics, so as to drive the wind valve blade to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing automatic adjustment of the air volume without power; The multiple control logics at least include: An angle control logic for directly controlling the blade angle of the wind valve blade; An air volume control logic for dynamically controlling the blade angle of the wind valve blade through a preset air volume value, so that the actual air volume value is stabilized within a first fluctuation range of the preset air volume value; A voltage control logic for dynamically controlling the blade angle of the wind valve blade through a preset voltage value, so that the actual air volume value is stabilized within a second fluctuation range of a converted air volume value; different preset voltage values correspond to different converted air volume values; A pressure control logic for dynamically controlling the blade angle of the wind valve blade through a differential pressure value between a current external pressure of an external environment and a preset external pressure, so that the current external pressure is stabilized within a third fluctuation range of the preset external pressure.

[0008] The angle control logic preferably includes: Receiving a manually set blade angle through the communication interface; Controlling the driving part to rotate until the wind valve blade is adjusted to the blade angle according to the blade angle.

[0009] The air volume control logic preferably includes: Receiving a preset air volume value through the communication interface; Real-time detecting an internal pressure of the air duct through the differential pressure sensing chip; Dynamically adjusting the blade angle of the wind valve blade based on a pre-trained air volume-internal pressure-angle relationship model, so that the actual air volume value is stabilized within a first fluctuation range of the preset air volume value.

[0010] The voltage control logic preferably includes: Obtaining an input voltage value through the voltage input interface; Converting the input voltage value into a corresponding converted air volume value; Real-time detecting an internal pressure of the air duct through the differential pressure sensing chip; Dynamically adjusting the blade angle of the wind valve blade based on a pre-trained air volume-internal pressure-angle relationship model, so that the actual air volume value is stabilized within a second fluctuation range of the converted air volume value.

[0011] More preferably, the pressure control logic comprises: detecting a current external pressure of an external environment through an external pressure sensor, and obtaining a differential pressure value in real time based on a preset external pressure of the external environment; obtaining a rotation trend of the air valve blade based on the differential pressure value; detecting an internal pressure of the air duct in real time through the differential pressure sensing chip; under the rotation trend, dynamically adjusting a blade angle of the air valve blade based on a pre-trained air volume-internal pressure-angle relationship model, so that the current external pressure is stabilized within a third fluctuation range of the preset external pressure.

[0012] More preferably, the shell, the air valve blade and the driving part jointly constitute a wind control unit, and the unpowered multi-working-condition wind control device comprises a plurality of the wind control units, each of which is electrically connected to the main control part; The main control part further comprises a dial switch for setting any one of the wind control units as an air supply unit or an air exhaust unit, and controlling the blade angle of each of the wind control units through the communication interface, so as to control the required air volume of each of the wind control units.

[0013] More preferably, the main control part further comprises a parameter memory module for saving running parameters after power failure and automatically recovering after restart; The main control part further comprises an abnormality detection module for monitoring abnormal states in device operation and prompting fault types through fault codes.

[0014] According to a second aspect of the embodiment of the present application, an unpowered multi-working-condition wind control method is provided, which is realized by using the above-mentioned unpowered multi-working-condition wind control device, and specifically comprises the following steps: S1: selecting any one of a plurality of control logics through the main control part according to different working condition requirements; S2: controlling the driving part to rotate through the main control part based on the selected control logic, so as to drive the air valve blade to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing unpowered automatic adjustment of the air volume.

[0015] More preferably, the step S1 further comprises the following steps before the step S1: If the wind control device comprises a plurality of wind control units, the type of any one of the wind control units is set through a dial switch in advance; based on the type of each of the wind control units, loading corresponding running parameters; initializing the differential pressure sensing chip of each of the wind control units, and controlling the blade angle of the air valve blade to be zero, for the next step of selecting the control logic of the main control part; The shell, the air valve blade and the driving part jointly constitute a wind control unit, the unpowered multi-working-condition wind control device comprises a plurality of the wind control units, and each of the wind control units is electrically connected with the master control part. The master control part further comprises a dial switch for setting any one of the wind control units as an air supply unit or an air exhaust unit and synchronously controlling the blade angle of each of the wind control units through the communication interface to uniformly distribute the air volume.

[0016] Preferably, the unpowered multi-working-condition wind control method further comprises: During the operation of the device, the abnormal state of the unpowered multi-working-condition wind control device is continuously monitored; If there is no abnormality, the monitoring is continuously performed; if there is an abnormality, the fault type is prompted through a fault code; Based on the fault type, a protection strategy is executed, and after the protection strategy is executed, the abnormal state of the unpowered multi-working-condition wind control device is re-monitored.

[0017] Compared with the prior art, the present application has the following technical effects: (1) Multi-mode intelligent control is realized, the angle, air volume, voltage or pressure control logic can be flexibly selected according to the actual working condition, and the adaptability is strong.

[0018] (2) High-precision driving parts are combined with pre-trained models to realize stable adjustment of the air volume, and the control precision is high and the response speed is fast.

[0019] (3) Multiple wind control units can work cooperatively, the air volume can be automatically distributed, and the fault unit can be shielded, and the system robustness is strong.

[0020] (4) The system reliability and maintainability are improved through the parameter memory and abnormality detection functions.

[0021] (5) The overall structure is simple, no external power driving is needed, energy saving and environmental protection are achieved, and the device is suitable for various ventilation scenes. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A structure schematic view of an unpowered multi-working-condition wind control device according to an embodiment of the present application is shown; Figure 2 A structure composition diagram of a master control part according to an embodiment of the present application is shown; Figure 3 A connection structure schematic view of a master control part and multiple wind control units according to an embodiment of the present application is shown; Figure 4 A whole flow chart of an unpowered multi-working-condition wind control method according to an embodiment of the present application is shown; Figure 5AThis is a partial flowchart illustrating a non-powered multi-condition wind control method provided in an embodiment of the present invention. Figure 5B To and Figure 5A The corresponding detailed flowchart. Detailed Implementation

[0023] The technical content of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] 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.

[0025] 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.

[0026] like Figure 1As shown, the air valve blade 2 is rotatably arranged in the air duct 103 for adjusting the opening size of the air duct 103. In the embodiment, when the air valve blade 2 is in the vertical state, the air duct 103 is completely closed; when the air valve blade 2 is in the horizontal state, the air duct 103 is completely opened. And the driving part 3 is connected with the air valve blade 2 for driving the air valve blade 2 to rotate. Preferably, the driving part 3 selects claw pole type permanent magnet synchronous gear motor, DC 24V, rated power 6W. It should be noted that in the embodiment, the final execution of all control logics (angle, air volume, voltage, pressure) is reflected in the rotation angle of the air valve blade 2, and the accuracy of the control of the driving part 3 directly depends on the accuracy of the angle control. And the claw pole type permanent magnet synchronous gear motor is equivalent to a "mechanical pre-frequency divider". Assuming that the reduction ratio is 60:1, the motor shaft rotates 60 times, and the output shaft rotates 1 turn (360°), which means that the control accuracy of the output shaft angle is improved by 60 times. It can be understood that the small rotation of the motor is "amplified" to the fine angle change of the output shaft to realize the stable adjustment of the air volume.

[0027] As shown in Figure 1 , the main control part 4 is located in the shell 1 and is electrically connected with the driving part 3 to drive and control the driving part 3. As shown in Figure 2 , the main control part 4 is integrated with a differential pressure sensing chip 41, a communication interface 42 and a voltage input interface 43. Among them, the differential pressure sensing chip 41 is equivalent to part of the main control part 4 and can directly participate in the execution of subsequent various control logics. However, the communication interface 42 and the voltage input interface 43 both need to be externally connected with corresponding functional parts to jointly control the driving part 3 in multiple modes through the main control part 4 cooperating with the functional parts connected with the communication interface 42 and the voltage input interface 43. Therefore, the main control part 4 can control the driving part 3 to rotate based on any one control logic, and the rotation angle of the driving part 3 is fed back to the main control part 4 through the potentiometer 301 to drive the air valve blade 2 to adjust the blade angle adaptively, so as to change the opening size of the air duct and realize the automatic adjustment of the air volume without power.

[0028] Specifically, the main control part 4 has at least four control logics, which are angle control logic, air volume control logic, voltage control logic and pressure control logic. The above four control logics will be described in detail as follows: (1) Angle control logic The angle control logic is used to directly control the blade angle of the air valve blade. Specifically, a preset blade angle value (for example, blade angle 30°) is received through the communication interface 42. As shown in Figure 1 , the angle of the air valve blade 2 in the vertical state is defined as 0°, and correspondingly, the angle adjustment range of the air valve blade 2 is 0-90°, and the larger the angle of the air valve blade 2, the larger the opening of the air duct 103.

[0029] When the blade angle is received, the driving part 3 is controlled to rotate by the main control part 4 until the air valve blade 2 is adjusted to the blade angle (i.e., 30°). It can be understood that the adjustment mode is a manual mode, and the user can freely adjust the required blade angle according to the required air volume.

[0030] (2) Air volume control logic The air volume control logic dynamically controls the blade angle of the air valve blade 2 through the preset air volume value, so that the actual air volume value is stabilized within the first fluctuation range of the preset air volume value.

[0031] Specifically, the following steps are included: ① The preset air volume value is received through the communication interface 42.

[0032] ② The internal pressure of the air duct 103 is detected in real time by the differential pressure sensing chip 41.

[0033] ③ Based on the pre-trained air volume-internal pressure-angle relationship model, the blade angle of the air valve blade is dynamically adjusted, so that the actual air volume value is stabilized within the first fluctuation range (for example, stabilized within ±5% of the preset air volume value) of the preset air volume value.

[0034] Wherein, the air volume-internal pressure-angle relationship model is trained by a pre-labeled data set, so that by detecting the internal pressure of the air duct 103 in real time, the corresponding actual air volume value of the internal pressure is determined, and then based on the difference between the real-time air volume value and the preset air volume value, the driving part 3 drives the air valve blade 2 to rotate to increase the blade angle (the real-time air volume value is less than the preset air volume value) or decrease the blade angle (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.

[0035] (3) Voltage control logic The voltage control logic dynamically controls the blade angle of the air valve blade through the 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.

[0036] In this embodiment, the voltage control logic and the air volume control logic are actually both control of air volume, the difference lies in that in the voltage control logic, the input voltage value needs to be obtained through the voltage input interface 43 first, and the input voltage value is converted into the corresponding converted air volume value. The converted air volume value is equivalent to the preset air volume value in the air volume control logic, and then the actual air volume value is stabilized within the second fluctuation range (for example, stabilized within ±5% of the converted air volume value) of the converted air volume value through the similar air volume control logic.

[0037] In this embodiment, the voltage value input through the voltage input interface 43 is 0-10V, and the voltage value needs to be greater than 0. Among them, 10V corresponds to the maximum air volume, and the output voltage value can be converted into the corresponding converted air volume value according to the preset linear relationship, for example: 10V corresponds to 500m 3 / h, 5V corresponds to 250m 3 / h. Of course, in other embodiments, a non-linear conversion method (such as a quadratic function, an exponential function, a logarithmic function, etc.) can also be used, which is not limited here.

[0038] (4) Pressure control logic The pressure control logic dynamically controls the blade angle of the air valve blade 2 through the pressure difference value between the current external pressure of the external environment and the preset external pressure, so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure.

[0039] Specifically, the following steps are included: ① Detect the current external pressure of the external environment through the external pressure sensor, and obtain the pressure difference value in real time based on the preset external pressure (positive pressure / negative pressure) of the external environment.

[0040] ② Obtain the rotation trend of the air valve blade 2 based on the pressure difference value, wherein the rotation trend is one of the blade angle decreasing or the blade angle increasing. And if the air control unit is an air supply unit, increase the blade angle to increase the positive pressure; on the contrary, if the air control unit is an air exhaust unit, increase the blade angle to increase the negative pressure.

[0041] ③ Detect the internal pressure of the air duct 103 in real time through the pressure difference sensing chip 41.

[0042] ④ Under the rotation trend, dynamically adjust the blade angle of the air valve blade 2 based on the pre-trained air volume-internal pressure-angle relationship model, so that the current external pressure is stabilized within the third fluctuation range of the preset external pressure (for example: the deviation is not more than 3Pa).

[0043] It can be understood that in the pressure control logic, the pressure difference sensing chip 41 and the external pressure sensor need to cooperate. Among them, the external pressure sensor is used to obtain the rotation trend of the air valve blade 2 to control the direction of the air valve blade 2 as a whole; the internal pressure sensor 41 obtains the internal pressure of the air duct, and then uses the relationship model to control the rotation angle of the air valve blade 2 in detail. Therefore, through the cooperation of the whole and the detail, the precise control of the air valve blade 2 is realized.

[0044] In addition, it should be noted that the inside of the unpowered multi-working-condition air control device is provided with a total pressure and static pressure sampling port 46, which is connected with the pressure sensing chip 41 on the main control part 4 through a pipeline. Thus, the pressure sensing chip 41 collects analog signals of the total pressure and the static pressure in real time, and the sampling frequency is set to collect one group of data every 300 milliseconds. A large number of experiments have verified that the single collection data is easily affected by factors such as instantaneous airflow fluctuation in the air duct, pipeline airflow disturbance and the like, and there is a problem of data dispersion, which directly leads to insufficient stability of the measurement results; if the mean value is only obtained by increasing the sampling group number to improve the stability, the data update cycle will be significantly prolonged, which cannot meet the real-time control requirement.

[0045] To solve the technical contradiction between stability and real-time performance, the embodiment of the application independently develops a logic algorithm of “sliding window + extreme value elimination + mean value fusion”, and the specific implementation process is as follows: the pressure sensing chip 41 continuously collects data at a frequency of 300 milliseconds / group, the system constructs a sliding window of 100 groups of data, and automatically eliminates the oldest group of data in the window after each new group of data is collected, and retains the latest 100 groups of effective data; the 100 groups of data are preprocessed, and one group of maximum value and one group of minimum value are eliminated to exclude the interference of extreme abnormal values; the remaining 98 groups of effective data are subjected to mean value calculation to obtain stable measurement values of the total pressure and the static pressure at the current time. Through the algorithm design, the data update cycle of more than 30 seconds caused by the traditional cumulative mean value calculation is compressed to 300 milliseconds synchronized with the sampling frequency, while ensuring the data anti-interference ability and stability, the high-frequency real-time output of the total pressure value and the static pressure value is realized.

[0046] After the main control part 4 reads the total pressure and static pressure data optimized by the above-mentioned independent algorithm, firstly, the real-time dynamic pressure value P in the air duct 103 is accurately calculated according to the core principle of fluid mechanics (dynamic pressure = total pressure - static pressure); then the preliminary air volume data is obtained by substituting into the air volume theoretical calculation formula V1=√(2P / ρ) (where V1 is the theoretical calculation air volume value, and ρ is the fluid medium density, which is preset as an initial value based on the standard working condition, and can be dynamically corrected according to the actual environment temperature and humidity).

[0047] To further eliminate the system error caused by the theoretical model and the actual application scene (such as the influence of the local resistance of the air duct, the viscous loss of the fluid, the change of the environmental temperature and humidity on the medium density, etc.), the air volume calibration mechanism is established through the laboratory calibration process in the embodiment of the application: in a standard experimental environment, a professional air volume test equipment (the precision level meets GB / T 1236-2017 Ventilator air dynamic performance test method) is used to perform multiple parallel tests on the device under different working conditions (such as different air speeds and different air duct resistances), and the standard air volume value V2 under the corresponding working condition is obtained; the dynamic mapping relationship of the air volume calibration coefficient K=V2 / V1 is established by fitting and analyzing the data of multiple V1 and V2, and a calibration database is formed.

[0048] In the actual operation process, the main control unit 4 will call the corresponding calibration coefficient K according to the current working condition (such as the dynamic pressure range and the environmental parameter), and correct the theoretically calculated air volume value V1 in real time (the final air volume value V=V1xK), so as to finally realize the real-time air volume measurement with high frequency response (300 milliseconds / second update), high stability and high accuracy, and provide accurate and reliable data support for the core control logic (such as air speed regulation and air pressure matching) of the device.

[0049] As a comparison, the external pressure sensor mentioned in the "pressure control logic" part in the embodiment is a commercially available finished differential pressure sensor, which usually detects the static pressure of two environments (such as indoor and outdoor) through two pressure measuring tubes, and directly outputs a digital or analog signal representing the static pressure difference value.

[0050] Based on the above technical design, the core innovation of the embodiment of the present application is that the functional limitation of the traditional commercially available differential pressure sensor "single static pressure difference value detection" is broken through, and the core detection logic is integrated by independent research and development, and is directly integrated in the main control part 4. Compared with the commercially available differential pressure sensor which can only indirectly output the static pressure difference value of two environments, the embodiment of the present application realizes the cost optimization by "chip level instead of module level" through the integrated design of "full pressure / static pressure sampling port + general pressure sensing chip + independent research and development algorithm + laboratory calibration", and the cost is reduced by 90% (from about 200 yuan of the purchase cost of the finished sensor to about 20 yuan of the chip level). Through the three technical breakthroughs, the performance is upgraded: first, the core contradiction between high-frequency sampling and data stability is solved by the "sliding window + extreme value elimination + mean fusion" algorithm, realizing 300 millisecond level real-time data update; second, the limitation of the finished sensor that can only detect the static pressure difference value is broken through, and the original data of the full pressure and static pressure in the air duct are directly obtained, and then the dynamic pressure and real-time air volume are derived, and the measurement dimension is more comprehensive; third, combined with the dynamic calibration mechanism established by the laboratory in multiple working conditions, the environmental interference and system error are effectively offset, and the measurement accuracy is significantly better than that of the traditional finished sensor. Finally, while greatly reducing the hardware cost, the embodiment of the present application realizes the three technical goals of "high-frequency response, stable output and accurate measurement", provides more comprehensive and reliable multi-dimensional data support for the core control logic of the device such as air speed regulation and air pressure matching, and balances the economy and technical advancement.

[0051] In addition, it should be noted that the 100 groups of data in the above test are only one specific embodiment, and in other embodiments, there can be 50 groups, 80, 150, 200 groups, …… The application finds that measuring 50 groups of data is faster, but the data is unstable, and measuring 200 groups of data is more stable than 100 groups of data, but it takes more time. According to the application requirements of the room scene, 100 groups of data are considered to be faster and more stable. In actual application, the user can independently set the number of measurement groups according to the specific environmental requirements.

[0052] The air volume calibration coefficient K mentioned in the above embodiment is also not a fixed value. The embodiment of the present application has three specifications, air volume (500, 1000, 1600). Due to the difference in the design of the air passage area of products with different air volume specifications, the corresponding air volume calibration coefficient K also needs to be individually matched and set according to the product specifications.

[0053] In the above embodiment, preferably, the non-powered multi-working-condition air control device comprises a plurality of air control units, each of which is electrically connected with the main control part 4. Correspondingly, as shown in Figure 2 and Figure 3As shown, the master control part further includes a dial switch 44 for setting any one of the air control units as an air supply unit or an air exhaust unit, and synchronously controlling the blade angle of each air control unit through the communication interface 42, so as to perform uniform distribution or personalized distribution of air volume (for example, different rooms correspond to different required air volume), thereby realizing the cooperative control of the combined use of multiple air control units. At this time, if a certain air control unit fails, the failed unit is shielded and the air volume is redistributed.

[0054] In the above embodiment, more preferably, the master control part 4 further includes a parameter memory and abnormality detection module 45. The parameter memory and abnormality detection module 45 is used to save running parameters (such as saving the current running mode, air volume / pressure set value, etc.) after power failure, and automatically restore after restart. Moreover, the parameter memory and abnormality detection module 45 is also used to monitor the abnormal state in the running of the device, and prompts the fault type through the fault code (such as E01 for air supply angle fault), so as to facilitate the maintenance worker to quickly locate the fault area and improve the maintenance efficiency.

[0055] As shown in Figure 4 , Figure 5A and Figure 5B On the basis of the above embodiment, the embodiment of the application further provides a non-powered multi-working-condition air control method, which specifically includes the following steps: S0: setting the type of each air control unit.

[0056] Specifically, if the air control device includes multiple air control units, the type of any one of the air control units is set in advance through the dial switch 44 (i.e., setting each air control unit as an air supply unit or an air exhaust unit). Then, based on the type of each air control unit, the corresponding running parameters are loaded. Finally, the differential pressure sensing chip 41 of each air control unit is initialized, and the blade angle of the air valve blade 2 is controlled to zero, so as to enter the control logic selection of the master control part 4 in step S1.

[0057] It can be understood that if the air control device has only one air control unit, this step S0 can be omitted, and directly enter step S1.

[0058] S1: selecting any one of the above four control logics through the master control part 4 according to different working condition requirements.

[0059] S2: based on the selected control logic, the master control part 4 controls the driving part 3 to rotate, so as to drive the air valve blade 2 to adaptively adjust the blade angle, thereby changing the opening size of the air duct 103, and realizing the non-powered automatic adjustment of air volume.

[0060] In addition, preferably, the non-powered multi-working-condition air control method further includes: S3: abnormality monitoring.

[0061] Specifically, during the operation of the device, the abnormal state of the unpowered multi-working-condition air control device is continuously monitored. If there is no abnormality, continuous monitoring is performed; if there is an abnormality, the fault type is prompted through a fault code. Moreover, based on the prompted fault type, a corresponding protection strategy is executed, and after the protection strategy is executed, the abnormal state of the unpowered multi-working-condition air control device is re-monitored, forming a closed-loop monitoring logic.

[0062] It should be noted that the above embodiments are only illustrative. The technical solutions of each embodiment can be combined, and all are within the protection scope of the present application.

[0063] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0064] The unpowered multi-working-condition air control device and method provided by the present application are described in detail above. For those skilled in the art, any obvious modification made to it without departing from the essential content of the present application will constitute an infringement of the patent right of the present application and will bear the corresponding legal responsibility.

Claims

1. A passive multi-condition air control device, characterized in that The application relates to a non-powered multi-working-condition air control device. The device comprises: a shell, in which a wind channel is formed; a wind valve blade rotatably arranged in the wind channel and used for adjusting the opening size of the wind channel; a driving part connected with the wind valve blade and used for driving the wind valve blade to rotate; a main control part electrically connected with the driving part and integrated with a differential pressure sensing chip, a communication interface and a voltage input interface; the main control part has multiple control logics and controls the driving part to rotate based on any one of the control logics, so as to drive the wind valve blade to adaptively adjust the blade angle, change the opening size of the wind channel and realize automatic adjustment of the air volume without power; wherein the multiple control logics at least include: an angle control logic used for directly controlling the blade angle of the wind valve blade; an air volume control logic used for dynamically controlling the blade angle of the wind valve blade through a preset air volume value, so that the actual air volume value is stabilized in a first fluctuation range of the preset air volume value; a voltage control logic used for dynamically controlling the blade angle of the wind valve blade through a preset voltage value, so that the actual air volume value is stabilized in a second fluctuation range of the converted air volume value; wherein different preset voltage values correspond to different converted air volume values; 2. The unpowered multi-condition air control device of claim 1, wherein a pressure control logic used for dynamically controlling the blade angle of the wind valve blade through the differential pressure value between the current external pressure of the external environment and a preset external pressure, so that the current external pressure is stabilized in a third fluctuation range of the preset external pressure. The angle control logic comprises: receiving a preset blade angle value through the communication interface; 3. The unpowered multi-condition air control device of claim 1, wherein controlling the driving part to rotate until the wind valve blade is adjusted to the blade angle according to the blade angle. The air volume control logic comprises: receiving a preset air volume value through the communication interface; real-time detecting the internal pressure of the wind channel through the differential pressure sensing chip; 4. The unpowered multi-condition air control device of claim 1, wherein dynamically adjusting the blade angle of the wind valve blade based on a pre-trained air volume-internal pressure-angle relationship model, so that the actual air volume value is stabilized in the first fluctuation range of the preset air volume value. The voltage control logic comprises: obtaining an input voltage value through the voltage input interface; converting the input voltage value into a corresponding converted air volume value; real-time detecting the internal pressure of the wind channel through the differential pressure sensing chip; 5. The unpowered multi-condition air control device of claim 1, wherein dynamically adjusting the blade angle of the wind valve blade based on a pre-trained air volume-internal pressure-angle relationship model, so that the actual air volume value is stabilized in the second fluctuation range of the converted air volume value. The pressure control logic comprises: detecting the current external pressure of the external environment through an external pressure sensor and obtaining a differential pressure value in real time based on a preset external pressure of the external environment; obtaining a rotation trend of the wind valve blade based on the differential pressure value; real-time detecting the internal pressure of the wind channel through the differential pressure sensing chip; under the rotation trend, dynamically adjusting the blade angle of the wind valve blade based on a pre-trained air volume-internal pressure-angle relationship model, so that the current external pressure is stabilized in the third fluctuation range of the preset external pressure.

6. The non-powered multi-working-condition air control device according to claim 1, wherein: The shell, the air valve blade and the driving part jointly constitute a wind control unit, the unpowered multi-working-condition wind control device comprises a plurality of the wind control units, and each of the wind control units is electrically connected with the master control part; The master control part further comprises a dial switch, which is used for setting any one of the wind control units as an air supply unit or an air exhaust unit, and controlling the blade angle of each of the wind control units through the communication interface, so as to control the required air volume of each of the wind control units.

7. The unpowered multi-working-condition wind control device according to claim 1, characterized in that: The master control part further comprises a parameter memory module, which is used for saving the operation parameters after power failure and automatically restoring after restart; The master control part further comprises an abnormality detection module, which is used for monitoring the abnormal state in the operation of the device and prompting the fault type through a fault code.

8. A method for multi-condition and unpowered air control, which is implemented by using the unpowered multi-condition and air control device according to any one of claims 1-7. The method comprises the following steps: S1: according to the requirement of different working conditions, selecting any one of a plurality of control logics through the master control part; S2: based on the selected control logic, controlling the driving part to rotate through the master control part, so as to drive the air valve blade to adaptively adjust the blade angle, thereby changing the opening size of the air duct and realizing the unpowered automatic adjustment of the air volume.

9. The unpowered multi-condition air control method according to claim 8, wherein Before the step S1, the following steps are further included: If the unpowered multi-working-condition wind control device comprises a plurality of wind control units, the type of any one of the wind control units is set through a dial switch in advance; Based on the type of each of the wind control units, the corresponding operation parameters are loaded; The differential pressure sensing chip of each of the wind control units is initialized, and the blade angle of the air valve blade is controlled to be zero, so as to select the control logic of the master control part in the next step; The shell, the air valve blade and the driving part jointly constitute a wind control unit, the unpowered multi-working-condition wind control device comprises a plurality of the wind control units, and each of the wind control units is electrically connected with the master control part; The master control part further comprises a dial switch, which is used for setting any one of the wind control units as an air supply unit or an air exhaust unit, and controlling the blade angle of each of the wind control units through the communication interface, so as to control the required air volume of each of the wind control units.

10. The unpowered multi-condition air control method according to claim 9, wherein Further comprising: During the operation of the device, the abnormal state of the unpowered multi-working-condition wind control device is continuously monitored; If there is no abnormality, the monitoring is continuously performed; if there is an abnormality, the fault type is prompted through a fault code; Based on the fault type, a protection strategy is executed, and after the execution of the protection strategy is completed, the abnormal state of the unpowered multi-working-condition wind control device is re-monitored.

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