CN113685980B - Fresh air equipment and control method, control device and readable storage medium thereof - Google Patents
Fresh air equipment and control method, control device and readable storage medium thereof Download PDFInfo
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- CN113685980B CN113685980B CN202010421560.XA CN202010421560A CN113685980B CN 113685980 B CN113685980 B CN 113685980B CN 202010421560 A CN202010421560 A CN 202010421560A CN 113685980 B CN113685980 B CN 113685980B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a control method of fresh air equipment, which comprises the following steps: acquiring the current exhaust air volume or the current fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment; determining the corresponding relation between the air volume and the differential pressure value according to the first air volume and the current differential pressure value; determining a target fresh air volume corresponding to the target differential pressure value according to the corresponding relation; and controlling the air supply of the fresh air equipment according to the target fresh air quantity. The invention also discloses a control device, fresh air equipment and a readable storage medium. The invention aims to accurately control the fresh air volume of the fresh air equipment in an indoor actual state, ensure that the indoor environment can reach a required positive pressure state and ensure the air quality of the indoor environment.
Description
Technical Field
The invention relates to the technical field of fresh air equipment, in particular to a control method and a control device of the fresh air equipment, the fresh air equipment and a readable storage medium.
Background
With the rapid development of economy and industry, air pollution in most areas is becoming serious, and how to purify the air quality of indoor space where people move for a long time becomes an important subject for ensuring the health of people. Since the indoor environment is not completely closed, the gap is used as a channel for the gas interaction between the indoor environment and the outdoor environment. In order to ensure that indoor air cannot be polluted by outdoor pollutants, a fresh air system is generally started, indoor air pressure is greater than outdoor air pressure by conveying fresh air to the indoor, a micro-positive pressure environment is formed, the indoor pollutants can be discharged outwards through a gap, and outdoor pollutants cannot enter the indoor environment.
However, the fresh air volume of the current fresh air system is generally a pre-configured parameter or is set by a user, because the indoor actual states such as the difference of the sealing degree of an actual building, the difference of a living scene, the difference of a space size and the like can affect the formation of an indoor positive pressure state, the set fresh air volume does not accurately evaluate the current actual situation of the space, the set fresh air volume has a deviation with the air volume required by the indoor positive pressure state, the air outlet of a fresh air device cannot enable the indoor environment to accurately reach the required micro-positive pressure environment, and the quality of the indoor environment is difficult to ensure.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a fresh air equipment control method, which aims to accurately control the fresh air volume of fresh air equipment in an indoor actual state, ensure that the indoor environment can reach a required positive pressure state and ensure the air quality of the indoor environment.
In order to achieve the above object, the present invention provides a fresh air device control method, including the steps of:
acquiring the current exhaust air volume or the current fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment;
determining the corresponding relation between the air volume and the differential pressure value according to the first air volume and the current differential pressure value;
determining a target fresh air volume corresponding to the target differential pressure value according to the corresponding relation;
and controlling the air supply of the fresh air equipment according to the target fresh air quantity.
Optionally, the step of obtaining the current air exhaust volume or the current fresh air volume of the fresh air equipment as the first air volume and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment comprises:
acquiring the current air exhaust volume or fresh air volume of the fresh air equipment at different moments in the process of currently exhausting or supplying air with the changed air volume by the fresh air equipment to obtain more than one first air volume;
and detecting the current differential pressure value between the action space of the fresh air equipment corresponding to each first air volume and the outdoor environment.
Optionally, before the step of obtaining the current air exhaust volume or the current fresh air volume of the fresh air device at different times and obtaining more than one first air volume, the method further includes:
controlling the air volume of the fresh air equipment to exhaust or supply air according to the set trend change; the set trend comprises a trend that the air volume changes from small to large or a trend that the air volume changes from large to small;
and in the air volume exhaust or air supply process of the fresh air equipment changing according to the set trend, executing the step of acquiring the current exhaust volume or fresh air volume of the fresh air equipment at different moments to obtain more than one first air volume.
Optionally, the step of determining the corresponding relationship between the air volume and the differential pressure value according to the first air volume and the current differential pressure value includes:
performing function fitting on more than one first air volume and the corresponding current differential pressure value thereof according to a set mode to obtain a functional relation;
and determining the corresponding relation according to the functional relation.
Optionally, before the step of determining the target fresh air volume corresponding to the target differential pressure value according to the corresponding relationship, the method further includes:
acquiring the concentration of a first pollutant in the action space of the fresh air equipment;
when the concentration of the first pollutant is greater than or equal to a first threshold value, controlling the fresh air equipment to exhaust air or send fresh air to operate;
in the process of exhausting or sending fresh air by the fresh air equipment, the step of acquiring the current exhaust air volume or the fresh air volume of the fresh air equipment as a first air volume and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment is executed;
if the first pollutant concentration is monitored to be less than or equal to a second threshold value, executing the step of determining the target fresh air volume corresponding to the target differential pressure value according to the corresponding relation;
wherein the second threshold is less than the first threshold.
Optionally, when the number of the set air volume is more than one, the step of controlling the operation of exhausting or sending fresh air by the fresh air device includes:
determining more than one set air volume and interval duration of air volume switching according to the first pollutant concentration; the set air volume comprises a set air exhaust volume or a set fresh air volume;
on the basis of the interval duration, the operation of the fresh air equipment is controlled according to each set air volume in sequence;
the method comprises the following steps of acquiring the current air exhaust volume or the current fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space and the outdoor environment of the fresh air equipment, wherein the steps comprise:
based on the interval duration, the current air exhaust volume or the current fresh air volume of the fresh air equipment is obtained at different moments, more than one first air volume is obtained, and the current differential pressure value of the fresh air equipment acting space and the outdoor environment corresponding to each first air volume is detected.
Optionally, the step of controlling the fresh air device to exhaust air or send fresh air to operate includes:
acquiring the current second pollutant concentration of the outdoor environment;
determining a concentration difference between the first contaminant concentration and the second contaminant concentration;
when the concentration of the second pollutant is less than that of the first pollutant and the concentration difference is greater than a set range, controlling the air exhaust operation of the fresh air equipment;
and when the concentration of the second pollutant is greater than or equal to the concentration of the first pollutant, or the concentration difference is less than or equal to the set amplitude, controlling the fresh air device to send fresh air to operate.
Further, in order to achieve the above object, the present application also proposes a control device including: the fresh air equipment control method comprises a memory, a processor and a fresh air equipment control program which is stored on the memory and can run on the processor, wherein when the fresh air equipment control program is executed by the processor, the steps of the fresh air equipment control method are realized.
In addition, in order to achieve the above object, the present application also provides a fresh air device, which includes the control device as described above.
In addition, in order to achieve the above object, the present application also provides a readable storage medium, where a fresh air device control program is stored, and when the fresh air device control program is executed by a processor, the steps of the fresh air device control method are implemented as described in any one of the above.
The method comprises the steps of acquiring the current air exhaust volume or the current fresh air volume of the fresh air equipment as a first air volume, detecting the current pressure difference value of an action space of the fresh air equipment and an outdoor environment, determining the corresponding relation between the air volume and the pressure difference value according to the current pressure difference value and the first pressure difference value, determining the target fresh air volume corresponding to the target pressure difference value according to the corresponding relation, and controlling the air supply of the fresh air equipment according to the target fresh air volume. The corresponding relation between the air volume and the pressure difference value is obtained by combining the indoor and outdoor pressure difference based on actual detection with the current fresh air volume or the current exhaust air volume of the fresh air equipment when the fresh air equipment exhausts or supplies fresh air, and is not preset or freely set by a user when the actual condition of the space cannot be evaluated, so that the obtained corresponding relation can accurately reflect the relation between the fresh air volume of the fresh air equipment and the actual positive pressure state which can be achieved in the current space, the target fresh air volume corresponding to the target pressure difference value determined based on the corresponding relation is more accurate, the air supply of the fresh air equipment is controlled according to the target fresh air volume, the indoor accurate positive pressure state corresponding to the target pressure difference value can be achieved, and the indoor ambient air quality is ensured.
Drawings
FIG. 1 is a schematic diagram of a hardware configuration involved in the operation of an embodiment of the control apparatus of the present invention;
FIG. 2 is a schematic flow chart of an embodiment of a control method for a fresh air device according to the present invention;
FIG. 3 is a schematic flow chart of another embodiment of a control method for a fresh air device according to the present invention;
FIG. 4 is a schematic flow chart illustrating a control method of a fresh air device according to another embodiment of the present invention;
FIG. 5 is a schematic flow chart illustrating a control method for a fresh air device according to still another embodiment of the present invention;
fig. 6 is a detailed flowchart of step S01 in fig. 5.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: acquiring the current exhaust air volume or the current fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment; determining the corresponding relation between the air volume and the differential pressure value according to the first air volume and the current differential pressure value; determining a target fresh air volume corresponding to the target differential pressure value according to the corresponding relation; and controlling the air supply of the fresh air equipment according to the target fresh air quantity.
Because in the prior art, the fresh air volume of the fresh air system is generally a preconfigured parameter or is set by a user, because the indoor actual states such as the actual building sealing degree difference, the living scene difference and the space size difference can affect the formation of the indoor positive pressure state, the set fresh air volume does not accurately evaluate the current actual condition of the space, so that the set fresh air volume and the air volume required by the indoor environment positive pressure state have deviation, the air outlet of the fresh air equipment cannot enable the indoor environment to accurately reach the required micro positive pressure environment, and the indoor environment quality is difficult to ensure.
The invention provides the solution, and aims to accurately control the fresh air volume of the fresh air equipment in an indoor actual state, ensure that the indoor environment can reach a required positive pressure state, and ensure the air quality of the indoor environment.
The invention provides a fresh air device which can be a device with a single fresh air function and a multifunctional device integrated with a fresh air device. The fresh air equipment is specifically used for inputting fresh air with the pollutant concentration lower than a set threshold value for the indoor environment so as to ensure the air quality of the indoor environment. In this embodiment, the fresh air device has an air conditioner with a fresh air function.
Fresh air equipment can specifically include fresh air supply assembly (like the fresh air fan, locate indoor fresh air outlet's wind guide assembly etc.) and purification module, is equipped with the fresh air wind channel that is used for the indoor outer environment of intercommunication in the fresh air equipment, and fresh air supply assembly 1 and purification module all locate the fresh air wind channel. When the fresh air supply assembly 1 is started (if the air guide assembly opens the air outlet and the fresh air fan is started), outdoor air is purified by the purification module to be air meeting indoor purification requirements and then is conveyed indoors. In the embodiment of the invention, the fresh air quantity refers to the air quantity which is sent into the room by the fresh air equipment and can meet the indoor purification requirement.
Further, in another embodiment of the fresh air device, the fresh air device may further include an air exhaust component 2 (such as an air exhaust fan and an air guide component disposed at an indoor air outlet), and an air exhaust duct for communicating indoor and outdoor environments may be further disposed in the fresh air device, and the air exhaust duct is connected to the indoor air outlet. When the air exhaust component 2 is started to operate (for example, the air guide component opens the air outlet and the air exhaust fan is started), indoor air is exhausted out of the room from the air exhaust duct. In the embodiment of the present invention, the exhaust air volume refers to an air volume of an indoor environment exhausted to the outdoor through the exhaust air duct.
Further, in another embodiment of the fresh air device, the exhaust air duct and the fresh air duct may be the same air duct, the fresh air outlet and the indoor air outlet may be the same air opening, and the fresh air blower and the exhaust air blower are both disposed in the air duct. Specifically, the fresh air fan and the exhaust fan can also be the same fan (fan with forward and reverse rotation functions). On the basis, because the air duct and the air port are the same, the fresh air function and the air exhaust function of the fresh air equipment are alternately realized, namely when the fresh air equipment sends fresh air to the room, the air exhaust function is closed; when new trend equipment will be indoor air discharge to indoor, the new trend function is closed. In other embodiments, when the air exhaust duct and the fresh air duct are separated and the fresh air outlet and the indoor air outlet are independent from each other, the fresh air device can send fresh air indoors and discharge polluted indoor air outdoors according to indoor environment regulation and control requirements.
Furthermore, the embodiment of the invention also provides a control device. The control device can be arranged in the fresh air equipment and can also be arranged independently of the fresh air equipment. Referring to fig. 1, the control device includes: a processor 1001 (e.g., a CPU), a memory 1002, an air pressure sensor 1003, an air quality detection module 1004, and the like. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.
The air pressure sensor 1003 is used for detecting air pressure data in the action space of the fresh air equipment. The baroceptor 1003 can be arranged in the space or on the fresh air device. Specifically, the air pressure sensor 1003 can be arranged far away from an air outlet or an air return opening of the fresh air device (such as an air return opening of a fresh air conditioner) so as to reduce the influence of air flow disturbance on the detection data of the air pressure sensor 1003 and ensure the accuracy of the data detected by the air pressure sensor 1003.
The air quality detection module 1004 is used for detecting relevant parameters of air quality in the action space of the fresh air equipment. The air quality detection module 1004 may specifically include at least one of PM1.0 (ultrafine particulate matter, which refers to particulate matter having an equivalent particle size of less than 0.1 μm), PM2.5 (fine particulate matter, which refers to particulate matter having an equivalent particle size of less than 2.5 μm), PM10 (respirable particulate matter, which refers to particulate matter having an equivalent particle size of less than 10 μm), TVOC (total Volatile Organic matter), CO2 (carbon dioxide), formaldehyde, NOX (nitrogen oxide), odor, and other gas sensors for detecting pollutant concentrations or levels, including PM1.0, PM2.5, PM10, TVOC, CO2, formaldehyde, NOX, odor, and the like.
The processor 1001 is respectively connected to the memory 1002, the air pressure sensor 1003, and the air quality detection module 1004 in a communication manner. The processor 1001 may obtain its collected data from the air pressure sensor 1003 and the air quality detection module 1004. The processor 1001 may also store desired data in the memory 1002 or retrieve data in the memory 1002 as needed. In addition, the processor 1001 can also be connected with a fresh air supply assembly 1 and an exhaust assembly 2 in the fresh air equipment to regulate and control the operation of the fresh air supply assembly 1 and the exhaust assembly 2.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a fresh air device control program may be included in the memory 1002 as a readable storage medium. In the apparatus shown in fig. 1, the processor 1001 may be configured to call a fresh air device control program stored in the memory 1002, and perform operations of relevant steps of a fresh air device control method in the following embodiments.
The invention also provides a control method of the fresh air equipment.
Referring to fig. 2, an embodiment of a control method for a fresh air device according to the present invention is provided. In this embodiment, the fresh air device control method includes:
step S10, acquiring the current air exhaust volume or fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment;
the action space (hereinafter referred to as space) of the fresh air equipment is communicated with the air outlet of the fresh air equipment, the air quality can be regulated and controlled through the air outlet of the fresh air equipment, and the space area has a limited area size. For example, the space acted on by the fresh air device can be a bedroom, a meeting room, a bathroom and the like.
The first air volume can be a currently stored or generated parameter in the system (such as a set air volume in a control parameter of the current operation of the fresh air equipment), and can also be detected by an air volume detection module on the fresh air equipment or in an action space of the fresh air equipment. The air exhaust volume refers to the air volume exhausted to the outdoor environment in the fresh air action space; the fresh air quantity refers to the air quantity sent into the fresh air action space after the fresh air equipment is purified. Based on the first air quantity, the set air quantity in the current control parameters of the system can be obtained to be used as the first air quantity; and data in the air volume detection module can be read to obtain the current air exhaust volume or fresh air volume of the fresh air equipment.
In the process of air exhaust or air supply operation of the fresh air equipment, the current air exhaust amount or the current fresh air amount of the fresh air equipment is obtained as a first air amount, and meanwhile, the current actual differential pressure value in the space is detected. Specifically, the current pressure difference value between the fresh air equipment action space and the outdoor environment can be obtained by obtaining the air pressure data currently detected by the indoor air pressure sensor and the outdoor air pressure sensor, and determining the difference value of the indoor air pressure data and the outdoor air pressure data. In other embodiments, the pressure data of the outdoor environment can be determined by acquiring the current geographic position of the fresh air device, the pressure data in the fresh air device action space can be obtained by acquiring the current detection data of the indoor pressure sensor, and the current pressure difference value between the fresh air device action space and the outdoor environment can be further determined based on the difference value between the two obtained pressure data.
In order to improve the accuracy of the correspondence obtained subsequently, the number of the first air volume is more than one, and each first air volume is correspondingly detected to obtain a current differential pressure value. Specifically, the operation of the fresh air equipment is controlled according to each set air volume in sequence, each set air volume can be respectively used as a first air volume, and the current differential pressure value of the indoor environment and the outdoor environment is detected under the operation state of the fresh air equipment corresponding to each set air volume and is used as the current differential pressure value corresponding to each first air volume. That is, when the number of the first air volume is N, N current differential pressure values are correspondingly obtained.
Step S20, determining the corresponding relation between the air volume and the differential pressure value according to the first air volume and the current differential pressure value;
in the corresponding relationship, one pressure difference value may have an air volume corresponding thereto, and the air volume increases as the pressure difference value increases. The corresponding relationship may specifically include a mapping relationship, a functional relationship (such as a calculation formula), a mathematical model, and the like, and may be set according to an actual situation. For example, the corresponding relationship may include more than one air volume, each air volume having a differential pressure value mapped thereto; the corresponding relation can also be a calculation formula between the air volume and the differential pressure value; the corresponding relation can also be an algorithm model (such as a deep neural network) between the air volume and the differential pressure value.
Specifically, the air volume and the differential pressure value may have a preset setting relationship, the setting relationship has a parameter whose value is unknown except for the air volume and the differential pressure value, the value of the unknown parameter in the setting relationship is determined based on the first air volume and the current differential pressure value, and the setting relationship determined by the unknown parameter is used as the corresponding relationship between the air volume and the differential pressure value. For example, the preset relationship is that y is f (x, a), y is the fresh air volume, x is the differential pressure value, and a is a parameter whose value is unknown, based on which the first air volume and the current differential pressure value are substituted into the preset relationship, the value of a is analyzed, and the preset relationship y is determined as f (x, a) as the corresponding relationship between the air volume and the differential pressure value. In addition, when the first air volume and the number of the corresponding current pressure difference values are more than one, the corresponding relationship between the first air volume and the current pressure difference values can be directly fitted based on the set relationship, and the corresponding relationship obtained through analysis is used as the corresponding relationship between the air volume and the pressure difference values. For example, when the first air volume is the fresh air volume, fitting to obtain a corresponding relationship between the fresh air volume and the current differential pressure value, and taking the obtained corresponding relationship as the corresponding relationship between the air volume and the differential pressure value; when the first air volume is the air discharge volume, the corresponding relation between the air discharge volume and the current differential pressure value is obtained through fitting, and the obtained corresponding relation is converted to obtain the corresponding relation between the air volume and the differential pressure value on the basis of the relation between the air discharge volume and the new air volume and the influence of the air volume and the differential pressure value on the differential pressure value.
Step S30, determining a target fresh air volume corresponding to the target differential pressure value according to the corresponding relation;
specifically, when the corresponding relationship includes more than one fresh air volume and each fresh air volume has a pressure difference value mapped thereto, a pressure difference value matched with the target pressure difference value may be determined in the corresponding relationship, and the fresh air volume mapped by the matched pressure difference value is taken as the target fresh air. Further, when the correspondence relationship is a functional relationship between the fresh air volume and the differential pressure value, the target differential pressure value may be substituted into the functional relationship, and the result of calculation may be taken as the target fresh air volume.
And step S40, controlling the air supply of the fresh air equipment according to the target fresh air quantity.
And controlling an air supply assembly (such as a fresh air fan) of the fresh air equipment to operate according to the target fresh air volume so that the air supply volume of the fresh air equipment can be greater than or equal to the target fresh air volume or within the interval of the target fresh air volume. Specifically, the air supply of the fresh air equipment can be directly controlled according to the target fresh air volume. The model (such as a cabinet air conditioner, an on-hook air conditioner and the like) of the air conditioner can also be obtained, different models can correspond to correction values of different fresh air volumes, the target fresh air volume is corrected based on the correction values, and air supply of the fresh air equipment is controlled according to the corrected target fresh air volume.
The method comprises the steps of acquiring the current air exhaust volume or the current fresh air volume of the fresh air equipment as a first air volume, detecting the current pressure difference value of an action space of the fresh air equipment and an outdoor environment, determining the corresponding relation between the air volume and the pressure difference value according to the current pressure difference value and the first pressure difference value, determining the target fresh air volume corresponding to the target pressure difference value according to the corresponding relation, and controlling the air supply of the fresh air equipment according to the target fresh air volume. The corresponding relation between the air volume and the pressure difference value is obtained by analyzing the indoor and outdoor pressure difference based on actual detection in combination with the current fresh air volume or the current exhaust air volume of the fresh air equipment when the fresh air equipment exhausts or supplies fresh air, and is not preset or freely set by a user when the actual space condition cannot be evaluated, so that the obtained corresponding relation can accurately reflect the relation between the fresh air volume of the fresh air equipment and the actual positive pressure state which can be achieved in the current space, the target fresh air volume corresponding to the target pressure difference value determined based on the corresponding relation is more accurate, the air supply of the fresh air equipment is controlled according to the target fresh air volume, the indoor accurate positive pressure state corresponding to the target pressure difference value can be achieved, and the indoor ambient air quality is ensured.
Further, based on the above embodiment, another embodiment of the control method for the fresh air device is provided. In this embodiment, referring to fig. 3, after step S40, the method further includes:
step S50, acquiring characteristic parameters of air pressure change in the action space of the fresh air equipment;
the air pressure variation parameter specifically refers to a parameter that characterizes a variation of air pressure per unit time period. The air pressure variation parameter may be a parameter (e.g., an air pressure variation curve) representing a continuous variation characteristic of the air pressure by continuously acquiring the air pressure in the time period, or may be a parameter (e.g., a variation amplitude or a variation rate of two air pressures detected at the beginning and the end) representing a variation characteristic of the air pressure at more than one time point by acquiring the air pressure detected at more than one time point in the time period.
In this embodiment, the air pressure data in the space may be acquired at set intervals, and the air pressure variation parameter may be determined according to the successively acquired air pressure data. Specifically, data detected by the air pressure sensor in the space can be acquired at a first moment as first air pressure data, and data detected by the air pressure sensor in the space can be acquired at a second moment as second air pressure data after a set time interval. And taking the difference value of the first low-pressure data and the second air pressure data as an air pressure change parameter. In addition, after the difference value between the first air pressure data and the second air pressure data is determined, the ratio of the difference value to the set time length can be used as the air pressure change parameter.
And step S60, controlling the fresh air equipment to adjust the air supply quantity according to the characteristic parameters and the target differential pressure value.
The target pressure difference refers to a target value which is required to be achieved by the pressure intensity of the space acted by the fresh air equipment and the pressure intensity of the environment outside the space. The target differential pressure value can be obtained by acquiring the setting parameters of the user, and can also be fixed parameters configured by default of the system. In order to ensure that the air quality of the indoor environment can be effectively ensured by the positive pressure state of the space corresponding to the obtained target pressure difference value, the air quality parameters of the working scene of the fresh air equipment and the outdoor environment can be obtained; and acquiring a set pressure difference according to a working scene, acquiring a correction value of the set pressure difference according to the air quality parameter, and determining the target pressure difference value according to the set pressure difference and the correction value.
Specifically, different air pressure change parameters and target differential pressure values can correspond to different adjustment amounts of air volume. The relationship between the air pressure variation parameter and the target differential pressure value and the adjustment amount can be preset, and can be a mapping relationship, a functional relational expression, an algorithm model and the like. Wherein, the larger the parameter and/or the target differential pressure value changes with the air pressure, the larger the corresponding adjustment amount can be. Based on the preset relationship, the adjustment quantity of the air quantity corresponding to the current air pressure change parameter and the target differential pressure value can be determined. For example, different target pressure difference values may correspond to different target variation parameters of the air pressure variation parameter, and an adjustment amount of the air volume is determined according to a deviation between the current air pressure variation parameter and the air pressure variation parameter corresponding to the target pressure difference value, where the larger the deviation is, the larger the determined adjustment amount may be. And after the adjustment amount is determined, controlling the air supply amount of the fresh air equipment to be increased or decreased according to the determined adjustment amount.
In this embodiment, because the air pressure variation parameter can reflect the air pressure variation caused by actual conditions such as space size and air leakage in the space when the target fresh air volume control fresh air device is operated, the deviation between the indoor air pressure state and the air pressure state required to be achieved under the current fresh air volume can be represented by combining the air pressure variation parameter and the target pressure difference value, so that the adjustment air supply volume of the control fresh air device is determined by combining the air pressure variation parameter and the target pressure difference value, the control fresh air device is adaptable to the actual conditions of the space under the control of the target fresh air volume, the air supply volume of the fresh air device is further accurately adjusted, the positive pressure state corresponding to the effective target pressure difference value in the indoor space is further ensured, and the indoor ambient air quality is ensured.
Further, based on any one of the above embodiments, another embodiment of the control method for the fresh air device is provided. In this embodiment, the number of the first air volume is more than one, and the step S10 includes:
step S11, in the process that the fresh air equipment exhausts or supplies air with the changed air volume currently, the current exhaust air volume or the new air volume of the fresh air equipment is obtained at different moments, more than one first air volume is obtained, and the current differential pressure value between the action space of the fresh air equipment corresponding to each first air volume and the outdoor environment is detected.
Specifically, in the process of exhausting or supplying air by the fresh air equipment at present with randomly changing air volume, changing air volume from small to large or changing air volume from large to small, the current exhaust air volume or the new air volume of the fresh air equipment is obtained at different moments, more than one first air volume can be obtained, and the current differential pressure value between the space and the outdoor environment is detected at the moment of obtaining each first air volume.
In order to obtain more accurate corresponding relation, the air volume of the fresh air equipment which changes according to a set trend can be controlled to exhaust or supply air before the step S11; the set trend comprises a trend that the air volume changes from small to large or a trend that the air volume changes from large to small; and in the air volume exhaust or air supply process of the fresh air equipment changing according to the set trend, executing the step of acquiring the current exhaust volume or the current fresh air volume of the fresh air equipment at different moments to obtain more than one first air volume and detecting the current differential pressure value of the action space of the fresh air equipment corresponding to each first air volume and the outdoor environment.
The different moments can be selected at will, and the method can also be suitable for determining the change rule of the air volume. Specifically, during the process of exhausting or blowing air according to the set air volume (including the set exhaust air volume or the set fresh air volume) with the set trend change, the fresh air device may use any time in the operation time period corresponding to each set air volume as the time for acquiring the first air volume, acquire each set air volume as the first air volume, and detect the pressure difference value between the space and the outdoor environment detected in the state corresponding to each set air volume. Each set air volume has a current differential pressure value corresponding thereto. When each set air volume is a numerical value, the pressure difference value of the space and the outdoor environment can be detected at any time in the process of controlling the operation of the fresh air equipment according to each set air volume to obtain the current pressure difference value corresponding to the set air volume; when each set air volume is an interval, the pressure difference value between the space and the outdoor environment can be detected at a plurality of moments in the process of controlling the operation of the fresh air equipment according to each set air volume, and the current pressure difference value corresponding to the set air volume is obtained through further analysis based on the detected parameters.
Specifically, when the fresh air equipment exhausts air with variable air volume, the air exhaust volume can include four grades of 0-30m3/h, 31-60m3/h, 61-100m3/h and 101-150m3/h, the first step controls the air exhaust of the fresh air equipment with 0-30m3/h, the second step controls the air exhaust of the fresh air equipment with 31-60m3/h, the third step controls the air exhaust of the fresh air equipment with 61-100m3/h, and the fourth step controls the air exhaust of the fresh air equipment with 101-150m 3/h. Based on this, in the process of executing the first step, the corresponding detection result negative pressure value is-1 Pa, in the process of executing the second step, the corresponding detection result negative pressure value is-3 Pa, in the process of executing the third step, the corresponding detection result negative pressure value is-5 Pa, and in the process of executing the fourth step, the corresponding detection result negative pressure value is-8 Pa.
Specifically, when the fresh air equipment is supplied with air with variable air volume, the fresh air volume can comprise 20m 3 /h、50m 3 /h、80m 3 /h、120m 3 Fourth gear,/h, the first step is 20m 3 H controlling fresh air supply of fresh air equipment, and the second step is 50m 3 The third step is to control the fresh air supply of the fresh air equipment to be 80m 3 H controlling fresh air supply of fresh air equipment, and the fourth step of using 120m 3 And h, controlling the fresh air supply device to supply fresh air. Based on this, in the process of executing the first step, the corresponding detection result positive pressure value is +2Pa, in the process of executing the second step, the corresponding detection result positive pressure value is +5Pa, in the process of executing the third step, the corresponding detection result positive pressure value is +8Pa, and in the process of executing the fourth step, the corresponding detection result positive pressure value is +12 Pa.
In this embodiment, the set air volume and the number of the current differential pressure values corresponding to the set air volume are more than one, and the corresponding relationship between the fresh air volume and the differential pressure values is analyzed based on multiple sets of data, so that the obtained corresponding relationship can be ensured to be more accurate. The method comprises the steps that in the process that the fresh air equipment exhausts air or supplies air with changed air volume, the current exhaust air volume or the fresh air volume of the fresh air equipment is obtained at different moments, and when the corresponding indoor and outdoor current differential pressure value is detected, the change of the exhaust air volume or the supply air volume of the fresh air equipment is not disordered but gradually changed based on the numerical value, so that the condition that the indoor positive pressure state represented by the detected current differential pressure value is not in error due to the fact that the air volume changes suddenly and the air pressure changes seriously and lags or causes air pressure disturbance and other factors is avoided, and the accuracy of the subsequently determined corresponding relation can be further improved. Especially, when the fresh air equipment is controlled according to each set air volume on the basis of the trend from small to large and the corresponding current pressure difference value is detected, the indoor air pressure change can be changed more timely compared with the indoor air pressure change on the basis of the sequence from large to small, the accuracy of the positive pressure state represented by the detected current pressure difference value is further improved, and the accuracy of the corresponding relation is further improved.
Further, in the present embodiment, step S20 includes:
step S21, performing function fitting on more than one set air volume and the corresponding current differential pressure value according to a set mode to obtain a functional relation;
and step S22, determining the corresponding relation according to the functional relation.
The setting mode refers to the type of a functional relationship (such as an exponential function, a linear function and the like) obtained by fitting between the preset fresh air volume and the differential pressure value. Specifically, the number of the setting modes may be one or more than one. When the number of the setting modes is one, the functional relationship obtained by fitting can be directly used as the corresponding relationship between the fresh air volume and the differential pressure value. When the number of the setting modes is more than one, more than one function relationship can be obtained by fitting more than one set air volume and the corresponding current differential pressure value according to each setting mode, and the function relationship with the highest evaluation coefficient is determined as the corresponding relationship according to the precision evaluation coefficient of each function relationship obtained by analyzing the set air volume and the corresponding current differential pressure value, the actual characteristic parameter of the air pressure change in the space in the set air volume change process, the target characteristic parameter of the air pressure change and the like. In order to ensure the accuracy of the determined correspondence relationship, the setting mode may be specifically that y is equal to a x + bx, where a and b are constants with unknown values, y is the air volume, and x is the differential pressure value, based on which the first air volume is used as y, and the current differential pressure value corresponding to the set air volume is substituted as x into y ═ a respectively x In + bx, more than one a and corresponding B values can be obtained, the obtained more than one a values are fitted to obtain a target value A of a, the obtained more than one B values are fitted to obtain a target value B of B, and finally, a functional relationship y ═ A x + Bx is taken as the correspondence between the fresh air volume and the differential pressure value.
Here, by generating a functional relationship between the air volume and the pressure difference value as a corresponding relationship, it is ensured that a subsequent arbitrary target pressure difference value can determine a target fresh air volume with high accuracy based on the functional relationship, and it is ensured that a space can reach a positive pressure state corresponding to the target pressure difference value required by an arbitrary scene.
Further, based on any one of the above embodiments, a further embodiment of the control method for the fresh air device is provided. In this embodiment, referring to fig. 5, before the step of step S30, the method further includes:
step S00, acquiring the concentration of a first pollutant in the action space of the fresh air equipment;
when the first contaminant concentration is greater than or equal to the first threshold value, step S01 is performed.
The first pollutant concentration is specifically a substance which has a negative influence on the air quality of the space, and the type of the first pollutant can be set by a user or can be pre-configured in the fresh air device. The first pollutant concentration can be obtained by acquiring current detection data of an air quality detection module in the space.
The concentration of the first pollutants is larger than or equal to a first threshold value, which indicates that the air quality in the space is poor, and the fresh air equipment is controlled to exhaust air or send fresh air so as to optimize the environment quality in the space.
Step S01, controlling the fresh air equipment to exhaust air or send fresh air to operate; in the process performed in step S01, step S10 is performed.
Specifically, the air exhaust or fresh air supply operation of the fresh air equipment can be controlled according to the set air volume. The setting of the air volume comprises setting of a fresh air volume or setting of an exhaust air volume. When the set air volume is more than one, each set air volume can be configured in advance, and can also be determined according to the current situation in the space. When the set air quantity comprises the set air discharge quantity, the control parameters of the air discharge component (such as the rotating speed of an air discharge fan, the air guide position of the air guide component of an air discharge outlet and the like) can be determined according to the set air discharge quantity, and the operation of the air discharge component is controlled according to the determined control parameters, so that the air quantity discharged to the outdoor environment in the action space of the fresh air equipment can reach the set air discharge quantity under the action of the air discharge component. When the set air volume comprises the set fresh air volume, the control parameters (such as the rotating speed of a fresh air fan, the air guide position of an air guide assembly of a fresh air port and the like) of the fresh air supply assembly can be determined according to the set fresh air volume, and the operation of the fresh air supply assembly is controlled according to the determined control parameters, so that the purified air volume sent into an action space of the fresh air equipment by the fresh air supply assembly can reach the set fresh air volume. In other embodiments, the setting of the air volume may further include setting an air exhaust volume and a fresh air volume, controlling operation of an air exhaust component in the fresh air device according to the set air exhaust volume, and controlling operation of a fresh air supply component in the fresh air device according to the set fresh air volume, so that an amount of air exhausted to the outside of the space where the fresh air device acts may reach the set air exhaust volume, and an amount of purified air supplied into the space may reach the set fresh air volume.
Specifically, when the first pollutant concentration is greater than or equal to the first threshold, more than one set air volume and the interval duration of air volume switching can be determined according to the first pollutant concentration, wherein the larger the first pollutant concentration is, the larger the sum or the average of the set air volume can be. The interval duration here specifically refers to a time length from when the control of the fresh air equipment is started according to one set air volume to when the control of the fresh air equipment is started according to the next set air volume. The interval duration between the set air volumes can be set to be the same or different according to actual requirements. Specifically, the larger the first pollutant concentration is, the longer the interval duration between the set air volumes with the larger values can be, and the shorter the interval duration between the set air volumes with the smaller values can be. Specifically, when the set air volume includes air volume 1, air volume 2, air volume 3, and air volume 4, air volume 1> air volume 2> air volume 3> air volume 4, and the interval duration between air volumes 1 and 2> the interval duration between air volumes 2 and 3> the interval duration between air volumes 3 and 4.
After the interval duration of each set air volume and the air volume switching is determined, the operation of the fresh air equipment can be sequentially controlled according to each set air volume based on the interval duration. Specifically, the operation of the fresh air equipment can be controlled from small to large according to the set air volume in sequence according to the numerical value of each set air volume based on the interval duration. In the process, based on the interval duration, the current exhaust air volume or the fresh air volume of the fresh air equipment is obtained at different moments to obtain more than one first air volume, and the current differential pressure value between the action space of the fresh air equipment and the outdoor environment corresponding to each first air volume is detected. Specifically, the fresh air equipment starts to supply air or exhaust air according to the air volume 1 at the first moment, the fresh air equipment starts to supply air or exhaust air according to the air volume 2 at the second moment, the fresh air equipment starts to supply air or exhaust air according to the air volume 3 at the third moment, and the fresh air equipment starts to supply air or exhaust air according to the air volume 4 at the fourth moment. And the interval duration between the first time and the second time, the interval duration between the second time and the third time and the interval duration between the third time and the fourth time are the determined interval durations. Based on the above, within the interval duration from the first moment to the second moment, the air volume 1 is obtained as a first air volume, and the current indoor and outdoor differential pressure value is detected as the current differential pressure value corresponding to the air volume 1; and acquiring the air volume 2 as another first air volume within an interval time period from the second moment to the third moment, detecting a current indoor and outdoor pressure difference value as a current pressure difference value corresponding to the air volume 2, and so on, and acquiring more than one first air volume and current pressure difference values corresponding to the first air volume by referring to the above mode when the fresh air equipment is controlled to supply air or exhaust air according to the set air volume in sequence based on the interval time period.
After step S01, when it is monitored that the first pollutant concentration is less than or equal to the second threshold, step S30 is performed. Wherein the second threshold is less than the first threshold. It should be noted that, after step S01, the pollutant concentration in the space is synchronously monitored during the execution of steps S10 and S20, and step S30 is executed when the first pollutant concentration is monitored to be less than or equal to the second threshold value.
After the fresh air equipment exhausts or sends fresh air, the concentration of pollutants in the space is continuously reduced, on the basis, when the concentration of the first pollutants is smaller than or equal to a second threshold value, the indoor environment quality is adjusted to a better state under the action of the fresh air equipment, S30 is executed at the moment, and based on the corresponding relation determined in the previous stage, the target fresh air volume corresponding to the target pressure difference value is determined to control the fresh air equipment to send the fresh air into the space, so that the space can form a positive pressure state corresponding to the target pressure difference value, the indoor environment is maintained in a better quality state, meanwhile, the outdoor pollutants cannot cause secondary pollution to the indoor environment, and the air quality of the indoor environment is further improved.
When the set air volume is more than one, in the step S01, N set air volume numbers are provided, but when the fresh air equipment may be controlled according to N (N < N) set air volumes, the first pollutant concentration has fallen below the second threshold, so that the corresponding relationship obtained based on the set air volume used for controlling the fresh air equipment and the current pressure difference value detected correspondingly may be insufficient in accuracy, and in order to quickly form a positive pressure state while ensuring that the subsequently obtained target fresh air volume may have sufficient air volume to effectively form a positive pressure state in the space, therefore, the number used for determining the first constant air volume of the corresponding relationship may be obtained, when the obtained number is smaller than the target number, an adjustment parameter of the target fresh air volume is determined according to the deviation between the obtained number and the target number, and the larger the deviation is, the larger the adjustment amplitude corresponding to the adjustment parameter is. And in the process of executing the step S30, after the reference fresh air volume corresponding to the target differential pressure value is determined based on the determination relationship, the reference fresh air volume is amplified according to the adjustment parameter to obtain the target fresh air volume, so that sufficient fresh air volume is ensured to enable the indoor environment to effectively form a positive pressure state not lower than the target differential pressure value.
Further, based on any one of the above embodiments, another embodiment of the control method for the fresh air device is provided. In this embodiment, referring to fig. 6, when the setting of the air volume includes the setting of the air discharge volume, the step S01 includes:
step S011, acquiring the current second pollutant concentration of the outdoor environment;
the second contaminant concentration may be obtained by acquiring detection data of an air quality detection module disposed in the outdoor environment.
Step S012, determining a concentration difference between the first contaminant concentration and the second contaminant concentration;
when the second pollutant concentration is smaller than the first pollutant concentration and the concentration difference is larger than a set amplitude, executing step S013; when the second contaminant concentration is greater than or equal to the first contaminant concentration, or the concentration difference is less than or equal to the set magnitude, step S014 is performed.
Step S013, controlling the air exhaust operation of the fresh air equipment;
and step S014, controlling the fresh air supply device to supply fresh air to operate.
It should be noted that, when the fresh air device exhausts air or blows air according to the set air volume, and the set air volume is more than one, the set air volume and the interval duration of the corresponding air volume switching can be determined according to the first pollutant concentration in the above embodiment.
The specific value of the set amplitude can be set according to actual conditions. The concentration of the second pollutant is less than that of the first pollutant, which indicates that the quality of outdoor air is better than that of air in the space, and if the concentration difference is greater than a set range, the concentration of the pollutant in the space can be effectively reduced when the outdoor air enters the room, so that the fresh air equipment can be controlled to operate according to the set air exhaust amount, and the polluted air in the space is pumped out of the room in an air exhaust manner to form a negative pressure environment in the space, so that the air with better quality in the outdoor environment enters the space from the air channel existing in the space and the outdoor environment at present under the action of pressure difference, and the quality of the air in the space is improved; if the concentration difference is smaller than the set range, or the concentration of the second pollutant is larger than or equal to the concentration of the first pollutant, the outdoor air enters the indoor environment to effectively reduce the concentration of the pollutant in the space and even further reduce the air quality in the space, therefore, the operation of the fresh air equipment can be controlled according to the set fresh air quantity, purified air is fed into the space, the concentration of the indoor pollutant is reduced, even a positive pressure environment can be formed, so that the indoor polluted air is discharged outdoors through the air channel, and the air quality in the space is effectively improved.
In addition, an embodiment of the present invention further provides a readable storage medium, where a fresh air device control program is stored on the readable storage medium, and when the fresh air device control program is executed by a processor, the steps related to any embodiment of the above fresh air device control method are implemented.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a new air device, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A fresh air equipment control method is characterized by comprising the following steps:
acquiring the current exhaust air volume or the current fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment;
determining the corresponding relation between the air volume and the differential pressure value according to the first air volume and the current differential pressure value;
determining a target fresh air volume corresponding to the target differential pressure value according to the corresponding relation;
controlling the air supply of the fresh air equipment according to the target fresh air quantity;
before the step of determining the target fresh air volume corresponding to the target differential pressure value according to the corresponding relation, the method further comprises the following steps:
acquiring the concentration of a first pollutant in the action space of the fresh air equipment;
when the concentration of the first pollutant is greater than or equal to a first threshold value, controlling the fresh air equipment to exhaust air or send fresh air to operate;
in the process of exhausting or sending fresh air by the fresh air equipment, the step of acquiring the current exhaust air volume or the fresh air volume of the fresh air equipment as a first air volume and detecting the current differential pressure value of the acting space of the fresh air equipment and the outdoor environment is executed;
when the quantity of the set air volume is more than one, the step of controlling the air exhaust or fresh air supply operation of the fresh air equipment comprises the following steps:
determining more than one set air volume and interval duration of air volume switching according to the first pollutant concentration; the set air volume comprises a set air exhaust volume or a set fresh air volume;
on the basis of the interval duration, the operation of the fresh air equipment is controlled according to each set air volume in sequence;
the method comprises the following steps of acquiring the current air exhaust volume or the current fresh air volume of the fresh air equipment as a first air volume, and detecting the current differential pressure value of the acting space and the outdoor environment of the fresh air equipment, wherein the steps comprise:
based on the interval duration, the current air exhaust volume or the current fresh air volume of the fresh air equipment is obtained at different moments, more than one first air volume is obtained, and the current differential pressure value of the fresh air equipment acting space and the outdoor environment corresponding to each first air volume is detected.
2. The method for controlling the fresh air device according to claim 1, wherein the step of obtaining the current exhaust air volume or the current fresh air volume of the fresh air device as the first air volume and detecting the current differential pressure value between the acting space of the fresh air device and the outdoor environment comprises:
acquiring the current air exhaust volume or fresh air volume of the fresh air equipment at different moments in the process of currently exhausting or supplying air with the changed air volume by the fresh air equipment to obtain more than one first air volume;
and detecting the current differential pressure value of the action space of the fresh air equipment corresponding to each first air volume and the outdoor environment.
3. The method for controlling a fresh air device according to claim 2, wherein before the step of obtaining the current air output or fresh air volume of the fresh air device at different times to obtain more than one first air volume, the method further comprises:
controlling the fresh air equipment to exhaust or supply air according to the air volume changing according to the set trend; the set trend comprises a trend that the air volume changes from small to large or a trend that the air volume changes from large to small;
and in the air volume exhaust or air supply process of the fresh air equipment changing according to the set trend, executing the step of acquiring the current exhaust volume or fresh air volume of the fresh air equipment at different moments to obtain more than one first air volume.
4. The fresh air device control method according to claim 2, wherein the step of determining the corresponding relationship between the air volume and the differential pressure value according to the first air volume and the current differential pressure value includes:
performing function fitting on more than one first air volume and the corresponding current differential pressure value thereof according to a set mode to obtain a functional relation;
and determining the corresponding relation according to the functional relation.
5. The fresh air device control method according to any one of claims 1 to 4, wherein after the step of obtaining the concentration of the first pollutant in the fresh air device action space, the method further comprises:
if the first pollutant concentration is monitored to be less than or equal to a second threshold value, executing the step of determining the target fresh air volume corresponding to the target differential pressure value according to the corresponding relation;
wherein the second threshold is less than the first threshold.
6. A control device, characterized in that the control device comprises: a memory, a processor, and a fresh air device control program stored on the memory and executable on the processor, the fresh air device control program when executed by the processor implementing the steps of the fresh air device control method according to any one of claims 1 to 5.
7. A fresh air device, characterized in that it comprises a control device according to claim 6.
8. A readable storage medium, wherein a fresh air device control program is stored on the readable storage medium, and when executed by a processor, the steps of the fresh air device control method according to any one of claims 1 to 5 are implemented.
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