CN109556224B - Positive and negative pressure state judgment method of fresh air system, fresh air system and medium - Google Patents

Positive and negative pressure state judgment method of fresh air system, fresh air system and medium Download PDF

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Publication number
CN109556224B
CN109556224B CN201811289138.2A CN201811289138A CN109556224B CN 109556224 B CN109556224 B CN 109556224B CN 201811289138 A CN201811289138 A CN 201811289138A CN 109556224 B CN109556224 B CN 109556224B
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installation area
fresh air
engineering
area parameter
positive
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CN109556224A (en
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刘国琰
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/40—Damper positions, e.g. open or closed
    • 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

Abstract

The invention provides a positive and negative pressure state judgment method of a fresh air system, the fresh air system and a medium. Wherein, the method comprises the following steps: adjusting the opening gear of a fresh air outlet or an air return outlet of the current area; calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear adjustment and the air quality index after the opening gear adjustment; and determining the positive and negative pressure states of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region. According to the invention, the problem that the positive and negative pressure state of the area is not accurately judged by the fresh air system in the related technology is solved, and the accuracy of judging the positive and negative pressure state in the area by the fresh air system is improved.

Description

Positive and negative pressure state judgment method of fresh air system, fresh air system and medium
Technical Field
The invention relates to the technical field of building ventilation, in particular to a positive and negative pressure state judgment method of a fresh air system, the fresh air system and a medium.
Background
With the development of modern industry, people enjoy the convenience brought by scientific and technological development, and the influence of industrial development on air quality is increasingly serious. Particularly in China, although the country has been vigorously developing environmental protection career, the severe haze problem of most cities in China cannot be changed in a short time. The healthy, energy-saving, simple, reliable fresh air system and the fresh air equipment become the focus of general attention of heating and ventilation engineers and users. The general fresh air system unit conveys fresh air to the indoor through a pipeline and an air port.
when the positive and negative pressure state of an area is controlled, the existing fresh air system is controlled by controlling the flow of a fresh air outlet and a return air outlet. Under the control mode, when the flow of the fresh air outlet is greater than that of the return air inlet, the system considers that the area is in a positive pressure state; when the flow of the fresh air outlet is smaller than that of the return air inlet, the system considers that the area is in a negative pressure state. However, in some cases, it is difficult to seal the indoor area of the fresh air system from the outside absolutely, and therefore, besides the fresh air outlet and the return air inlet, there may be a case where outside air enters the area through a path other than the fresh air system, or there may be a case where the inside air overflows to the outside through a path other than the fresh air system, and both cases may affect the positive and negative pressure states of the area.
For example, when the flow of the fresh air outlet is larger than that of the return air outlet, the system considers that the area is in a positive pressure state, and at the moment, if the air in the area overflows to the outside, the area may be in a balanced air pressure state or even a negative pressure state actually.
Therefore, if the positive and negative pressure states in the area are controlled only through the flow of the fresh air outlet and the return air inlet, the problem of inaccurate control exists.
Disclosure of Invention
The invention provides a method for judging the positive and negative pressure state of a fresh air system, the fresh air system and a medium, which at least solve the problem that the judgment of the positive and negative pressure state of a region by the fresh air system in the related technology is inaccurate.
In a first aspect, an embodiment of the present invention provides a method for determining a positive/negative pressure state of a fresh air system, including:
Adjusting the opening gear of a fresh air outlet or an air return outlet of the current area;
Calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear adjustment and the air quality index after the opening gear adjustment;
And determining the positive and negative pressure states of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region and the adjustment mode of the opening gear.
in a second aspect, an embodiment of the present invention provides a positive/negative pressure state determination apparatus, including:
the adjusting module is used for adjusting the opening gear of a fresh air outlet or an air return outlet of the current area;
the calculation module is used for calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear is adjusted and the air quality index after the opening gear is adjusted;
and the determining module is used for determining the positive and negative pressure states of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region.
in a third aspect, an embodiment of the present invention provides a fresh air system, where the system includes: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of the first aspect.
in a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which computer program instructions are stored, which, when executed by a processor, implement the method of the first aspect.
according to the positive and negative pressure state judgment method of the fresh air system, the fresh air system and the medium provided by the embodiment of the invention, the opening gear of the fresh air outlet or the return air outlet of the current area is adjusted; calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear adjustment and the air quality index after the opening gear adjustment; and determining the positive and negative pressure state of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region, so that the problem that the judgment of the fresh air system on the positive and negative pressure state of the region in the related technology is inaccurate is solved, and the judgment accuracy of the fresh air system on the positive and negative pressure state in the region is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
Fig. 1 is a flowchart of a positive/negative pressure state determination method of a fresh air system according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a positive/negative pressure state determination device of a fresh air system according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a hardware structure of a control portion of the fresh air system according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
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 apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In this embodiment, a method for judging a positive/negative pressure state of a fresh air system is provided, and fig. 1 is a flowchart of a method for judging a positive/negative pressure state of a fresh air system according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:
step S101, adjusting the opening gear of a fresh air outlet or an air return outlet of a current area;
Step S102, calculating an engineering equivalent installation area parameter of a current region according to an air quality index before opening gear adjustment and an air quality index after opening gear adjustment;
And S103, determining the positive and negative pressure states of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region.
In the steps, the air quality index is used for calculating the engineering equivalent installation area parameter, the engineering equivalent installation area parameter is compared with the engineering actual installation area parameter, and the positive and negative pressure states of the current region can be determined by combining the adjustment mode of the last opening gear.
If the current area and the external environment have gas exchange performed by other ways besides the fresh air system, the other ways must have pollutant exchange affecting the air quality index (including but not limited to the air quality indexes such as carbon dioxide concentration and PM2.5 concentration). In the steps of the invention, the amount of pollutants entering the current area from the fresh air outlet can be calculated by calculating the flow rate and the air quality index of the fresh air outlet; the amount of pollutants outside the current area discharged by the return air inlet can be calculated by calculating the flow and the air quality index of the return air inlet, and the engineering equivalent installation area parameter of the current area can be calculated according to the variation difference of the pollutants and the variation difference of the air quality index of the return air inlet.
In this embodiment, the engineering equivalent mounting area parameter is calculated by:
if the moment before the opening gear of the fresh air outlet is adjusted is T1, and the moment after the opening gear of the fresh air outlet is adjusted is T2, the engineering equivalent installation area parameter A of the current region is calculated by the following formula:
wherein, Q1T1the flow rate of fresh air outlet at the time of T1, Q2T1The flow of the return air inlet at the time of T1, U1T1Is the air quality index of the fresh air outlet at the time of T1, U2T2and U2T1The air quality indexes of the return air inlet at the time T2 and the time T1 are respectively.
Since there are various types of air quality indicators, for example: carbon dioxide concentration, PM2.5 concentration, etc. In step S102, when the air quality indexes are of multiple types, the engineering equivalent installation area parameters corresponding to each type of air quality index may be calculated, and the larger of the engineering equivalent installation area parameters is selected as the engineering equivalent installation area parameter to be used in step S103.
If the engineering equivalent installation area parameter is larger than the engineering actual installation area parameter, indicating that pollutants enter the current area from other ways, and the current area is in a negative pressure state; if the engineering equivalent installation area parameter is smaller than the engineering actual installation area parameter, indicating that pollutants overflow from other ways outside the current area and the current area is in a positive pressure state; in addition, when the engineering equivalent installation area parameter falls into a small range near the engineering actual installation area parameter, the communication between the pollutants and the external environment through other ways is not obvious, and at the moment, the current area can be considered to be in a balanced air pressure state, namely, the air pressure of the current area and the air pressure of the external environment are kept balanced.
Optionally, in this embodiment, when the engineering equivalent installation area parameter is equal to k times of the engineering actual installation area parameter, it is determined that the current region is in a balanced air pressure state; wherein k times of the actual installation area parameter of the project belongs to [ the actual installation area parameter of the project-a, the actual installation area parameter of the project + b ], and a and b are normal numbers.
alternatively, 0.75 ≦ k ≦ 1.25. In this case, a ═ b ═ 0.25 × the engineering actual installation area parameter.
The process of controlling the positive and negative pressure state of the area according to the above-described method for determining the positive and negative pressure state is described below with preferred embodiments.
let B1For the actual installation area parameter of engineering, basic flow is Q, and new trend air outlet flow is Q1, and return air inlet flow is Q2, then has:
I. When the pressure difference setting condition is a positive pressure state
with Q*＝1.5B1and synchronously sending the initial opening degree to a fresh air outlet and an air return inlet, and respectively adjusting the opening degrees of the fresh air outlet and the air return inlet according to Q.
Order:
Q1T1＝Q2T1＝Q*；
Q1T2＝Q1T1+ tuyere opening position 1; namely, the opening degree of the fresh air outlet of 1 gear is increased relative to the T1 at the T2 moment;
And (3) circulating step: calculating the equivalent installation area parameter A of the engineering, and comparing A with B1；
A judging step:
1. If A ═B1The value Q1 is assignedT3＝Q1T2；
Issue Q1 ═ Q1T3；
Exiting the loop;
2. If A > B1the value Q1 is assignedT3＝Q1T2+ tuyere opening position 1;
Issue Q1 ═ Q1T3；
The circulating step and the judging step are executed again at the time T4 after a period of time;
3. If A is less than or equal to 0.8B1The value Q1 is assignedT3＝Q1T2-tuyere opening position 1;
issue Q1 ═ Q1T3；
executing the circulating step and the judging step again at the time T4 after a period of time;
if and only if A is less than or equal to 0.8B1And when the previous cycle is the jump from the judging step 2, the cycle is exited; or when 0.8B1＜A＜B1The loop is exited.
II. Under the condition of pressure difference setting and negative pressure state
With Q*＝1.5B1And synchronously sending the initial opening degree to a fresh air outlet and an air return inlet, and respectively adjusting the opening degrees of the fresh air outlet and the air return inlet according to Q.
order:
Q1T1＝Q2T1＝Q*；
Q2T2＝Q2T1+ tuyere opening position 1; namely, the opening degree of the 1-gear return air inlet is increased relative to the T1 at the T2 moment;
And (3) circulating step: calculating the equivalent installation area parameter A of the engineering, and comparing A with B1；
A judging step:
1. If A is B1the value Q1 is assignedT3＝Q1T2；
issue Q2 ═ Q2T3；
exiting the loop;
2. If A < B1The value Q2 is assignedT3＝Q2T2+ tuyere opening position 1;
issue Q2 ═ Q2T3；
the circulating step and the judging step are executed again at the time T4 after a period of time;
3. If 0.75A > B1the value Q2 is assignedT3＝Q2T2-tuyere opening position 1;
Issue Q2 ═ Q2T3；
Executing the circulating step and the judging step again at the time T4 after a period of time;
If and only if 0.75A ≧ B1And when the previous cycle jumps from the judging step 2, the cycle is exited; or whenThe loop is exited.
III, pressure difference setting conditions for balancing air pressure state
With Q*＝1.5B1and synchronously sending the initial opening degree to a fresh air outlet and an air return inlet, and respectively adjusting the opening degrees of the fresh air outlet and the air return inlet according to Q.
Order:
Q1T1＝Q2T1＝Q*
And (3) circulating step: calculating the equivalent installation area parameter A of the engineering, and comparing A with B1；
a judging step:
1. If 0.6B1＜0.75A＜B1Then Q1 is maintainedT1＝Q2T1＝Q*；
2. if 0.8B1Value Q2 is assigned < AT3＝Q2T2+ tuyere opening position 1;
Issue Q2 ═ Q2T3；
the loop step is executed again at time T3 after a lapse of time;
3. if 0.75A > B1The value Q1 is assignedT3＝Q1T2+ tuyere opening position 1;
issue Q1 ═ Q1T3；
the loop steps are executed again at time T3 over time.
As can be seen from the above description of the positive-negative pressure state control process, in the conventional positive-negative pressure state control process, a is defaulted to B1The problem that the control of the positive and negative pressure states is inaccurate exists when the control is carried out. The positive and negative pressure state judgment method can improve the accuracy of positive and negative pressure state control.
through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. 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 (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The embodiment also provides a positive and negative pressure state judgment device of the fresh air system, and the device is used for realizing the positive and negative pressure state judgment method of the fresh air system. Fig. 2 is a schematic structural diagram of a positive/negative pressure state determination device of a fresh air system according to an embodiment of the present invention, and as shown in fig. 2, the device includes:
the adjusting module 21 is used for adjusting the opening gear of a fresh air outlet or an air return outlet of the current area;
the calculation module 22 is used for calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear is adjusted and the air quality index after the opening gear is adjusted;
and the determining module 23 is configured to determine a positive/negative pressure state of the current region according to a comparison result between the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region.
In addition, the method for judging the positive and negative pressure states of the fresh air system according to the embodiment of the invention described in conjunction with fig. 1 can be realized by the fresh air system. Fig. 3 shows a hardware structure diagram of a control portion of the fresh air system provided by the embodiment of the invention.
The control portion of the fresh air system may include a processor 31 and a memory 32 having stored computer program instructions.
specifically, the processor 31 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured as one or more Integrated circuits implementing the embodiments of the present invention.
memory 32 may include mass storage for data or instructions. By way of example, and not limitation, memory 32 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 32 may include removable or non-removable (or fixed) media, where appropriate. The memory 32 may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory 32 is a non-volatile solid-state memory. In a particular embodiment, the memory 32 includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor 31 reads and executes the computer program instructions stored in the memory 32 to realize the positive and negative pressure state determination method of any fresh air system in the above embodiments.
In one example, the control portion of the fresh air system may also include a communication interface 33 and a bus 30. As shown in fig. 3, the processor 31, the memory 32, and the communication interface 33 are connected via the bus 30 to complete mutual communication.
The communication interface 33 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiment of the present invention.
the bus 30 includes hardware, software, or both that couple the components of the fresh air system and its control to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 30 may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
The fresh air system can execute the positive and negative pressure state judgment method of the fresh air system in the embodiment of the invention based on the acquired data, thereby realizing the method described in conjunction with fig. 1.
In addition, by combining the positive and negative pressure state determination method of the fresh air system in the above embodiment, the embodiment of the present invention can be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; when executed by a processor, the computer program instructions implement the positive and negative pressure state determination method of any one of the fresh air systems in the above embodiments.
In summary, through the embodiments of the present invention, accurate determination of the positive and negative pressure states of the region is achieved, and the accuracy of the fresh air system in controlling the positive and negative pressure states in the region can be improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. a positive and negative pressure state judgment method of a fresh air system is characterized by comprising the following steps:
Adjusting the opening gear of a fresh air outlet or an air return outlet of the current area;
Calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear adjustment and the air quality index after the opening gear adjustment;
Determining the positive and negative pressure state of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region;
Wherein, according to the air quality index before the aperture gear of fresh air outlet is adjusted and the air quality index after the aperture gear of fresh air outlet is adjusted, calculate the engineering equivalent installation area parameter of current region includes:
if the moment before the opening gear of the fresh air outlet is adjusted is T1, and the moment after the opening gear of the fresh air outlet is adjusted is T2, the engineering equivalent installation area parameter A of the current region is calculated by the following formula:
wherein, Q1T1The flow of the fresh air at the time of T1, Q2T1The flow of the return air inlet at the time of T1 is U1T1The air quality index of the fresh air outlet at the time of T1, U2T2And U2T1the air quality indexes of the return air inlet at the time T2 and the time T1 respectively.
2. The method of claim 1, wherein the air quality indicator comprises at least one of: PM2.5 concentration, carbon dioxide concentration.
3. The method of claim 1, wherein calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear adjustment of the fresh air outlet and the air quality index after the opening gear adjustment of the fresh air outlet further comprises:
And under the condition that the air quality indexes are of various types, respectively calculating engineering equivalent installation area parameters corresponding to each type of air quality index, and selecting the larger one of the engineering equivalent installation area parameters as the engineering equivalent installation area parameter.
4. The method of claim 1, wherein determining the positive and negative pressure conditions of the current zone based on the comparison of the engineering equivalent installation area parameter to the engineering actual installation area parameter of the current zone comprises:
And when the engineering equivalent installation area parameter is larger than the engineering actual installation area parameter, determining that the current area is in a negative pressure state.
5. The method of claim 1, wherein determining the positive and negative pressure conditions of the current zone based on the comparison of the engineering equivalent installation area parameter to the engineering actual installation area parameter of the current zone comprises:
And when the engineering equivalent installation area parameter is smaller than the engineering actual installation area parameter, determining that the current area is in a positive pressure state.
6. The method of claim 1, wherein determining the positive and negative pressure conditions of the current zone based on the comparison of the engineering equivalent installation area parameter to the engineering actual installation area parameter of the current zone comprises:
When the engineering equivalent installation area parameter is equal to k times of the engineering actual installation area parameter, determining that the current area is in a balanced air pressure state;
Wherein k times of the engineering actual installation area parameter belongs to [ the engineering actual installation area parameter-a, the engineering actual installation area parameter + b ], and a and b are normal numbers.
7. The method of claim 6, wherein k is 0.75 ≦ 1.25.
8. The utility model provides a device is judged to positive negative pressure state of new trend system which characterized in that includes:
the adjusting module is used for adjusting the opening gear of a fresh air outlet or an air return outlet of the current area;
The calculation module is used for calculating the engineering equivalent installation area parameter of the current region according to the air quality index before the opening gear is adjusted and the air quality index after the opening gear is adjusted;
The determining module is used for determining the positive and negative pressure states of the current region according to the comparison result of the engineering equivalent installation area parameter and the engineering actual installation area parameter of the current region;
Wherein, the calculation module is specifically configured to:
if the moment before the opening gear of the fresh air outlet is adjusted is T1, and the moment after the opening gear of the fresh air outlet is adjusted is T2, the engineering equivalent installation area parameter A of the current region is calculated by the following formula:
Wherein, Q1T1the flow of the fresh air at the time of T1, Q2T1The flow of the return air inlet at the time of T1 is U1T1the air quality index of the fresh air outlet at the time of T1, U2T2and U2T1The air quality indexes of the return air inlet at the time T2 and the time T1 respectively.
9. A fresh air system, the system comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 1-7.
10. A computer-readable storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1-7.
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