Building space ventilation energy-saving system based on composite air pipe and method of building space ventilation energy-saving system

Abstract

The invention discloses a building space ventilation energy-saving system and method based on a composite air duct, and relates to the technical field of ventilation energy saving.A ventilation comprehensive pipeline BIM model is built, detection nodes are marked according to the ventilation comprehensive pipeline BIM model, environment data are collected through an information collection unit, and a normal ventilation pipe network model is simulated; the temperature influence factor in the pipeline is solved, then the standard output temperature of the vent pipe opening and the temperature influence coefficient outside the factory are solved, the output temperature interval of the vent pipe opening is obtained, and according to the output temperature interval of the vent pipe opening, the environment change is judged to generate a temperature rise regulation and control signal and a temperature drop regulation and control signal, and the signals are sent to the intelligent regulation and control unit; the intelligent regulation and control unit comprises a temperature rise regulation module and a temperature drop regulation module, and the intelligent regulation and control unit controls temperature rise or temperature drop; the output of the temperature of the composite air pipe can be adjusted in real time according to the environmental conditions needed by a factory workshop and the outdoor environment change, and the environment-friendly and energy-saving effects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation energy saving, and in particular to a building space ventilation energy saving system based on a composite air duct and a method thereof. Background Art

[0002] In the factory, workers and equipment need to maintain a certain temperature and ventilation during the production and processing process. Maintaining ventilation can not only reduce harmful substances in the air, such as dust, chemicals, steam, smoke, bacteria and viruses, and reduce the risk of workers suffering from occupational diseases, but also dilute the moisture and harmful substances in the air in the factory through ventilation, and reduce equipment corrosion. At the same time, the appropriate temperature can not only improve the production efficiency of workers, but also prevent equipment from being damaged due to overheating or stopping working due to overcooling. Moreover, the materials and finished products used in production in most factories are easily affected by temperature fluctuations, thereby affecting the quality of the products. Therefore, the factory needs to maintain ventilation and keep it within a certain temperature range.

[0003] Most of the ventilation and temperature control equipment used in existing factories requires manual regulation and cannot be adjusted in real time according to changes in the environment outside the factory. When the temperature inside the factory reaches an appropriate temperature, cooling or heating continues, which will cause a waste of resources, is not green and environmentally friendly, and cannot achieve energy saving. Or when temperature adjustment is needed, the ventilation and temperature control equipment is not turned on in time, causing damage to equipment in the factory and causing huge losses.

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to propose a building space ventilation energy-saving system based on composite air ducts and a method thereof, which can adjust the output of the composite air duct temperature in real time according to the required environmental conditions of the factory workshop and changes in the outdoor environment, thereby achieving environmental protection and energy saving effects.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a building space ventilation energy-saving system based on a composite air duct, comprising a duct marking unit, an information collection unit, an information analysis unit and an intelligent control unit;

[0007] The pipeline marking unit obtains the duct path distribution data in the environmental layout diagram of the target factory, builds a ventilation integrated pipeline BIM model based on the national environmental protection standards and the duct path distribution data, determines the duct path, numbers each pipe section and loop in the branch path, and marks the detection node according to the ventilation integrated pipeline BIM model;

[0008] The information collection unit includes an in-factory data collection module, an out-factory environment data collection module, an out-factory data collection module, and a ventilation duct data collection module;

[0009] The in-plant data acquisition module is used to collect environmental data B at the outlet of the ventilation pipe and send the environmental data B to the information analysis unit;

[0010] The off-site data collection module is used to collect off-site environmental data C and send the environmental data C to the information analysis unit;

[0011] The ventilation duct data collection module is used to collect environmental data D of each detection node in the ventilation duct and send the environmental data D to the information analysis unit;

[0012] The information analysis unit includes a model building module, a data analysis module and a parameter analysis module;

[0013] The model building module is used to build and analyze the normal ventilation pipe network model. The normal ventilation pipe network model is built based on the environmental conditions of sunny and windless days. By substituting the real-time ambient temperature outside the factory under normal conditions into the objective function, the standard output temperature of the ventilation pipe outlet is calculated;

[0014] The data analysis module is used to obtain environmental data D, wherein the environmental data D includes the pipe temperature Td and the pipe gas flow data Qd at the detection node in the ventilation pipe, calculate the pipe temperature influence factor based on the pipe temperature Td and the pipe gas flow data Qd, calculate the normal output temperature of the ventilation pipe port according to the pipe temperature influence factor, and calculate the temperature influence coefficient outside the factory according to the standard output temperature of the ventilation pipe port and the environmental data C;

[0015] The parameter analysis module is used to obtain the standard production temperature required by each workshop in the factory, calculate the output temperature range of the ventilation pipe outlet based on the standard production temperature and the temperature influence coefficient outside the factory, compare the output temperature range of the ventilation pipe outlet with the environmental data C to judge the change of the environment outside the factory, generate a temperature increase control signal and a temperature decrease control signal based on the judgment result, and send the temperature increase control signal and the temperature decrease control signal to the intelligent control unit;

[0016] The intelligent control unit includes a temperature increase adjustment module and a temperature decrease adjustment module, and the temperature increase adjustment module controls the output temperature of the ventilation pipe port by receiving a temperature increase adjustment signal;

[0017] The temperature reduction regulation module controls and lowers the output temperature of the ventilation pipe opening by receiving the temperature reduction regulation signal.

[0018] Furthermore, the specific working process of the pipeline marking unit is as follows:

[0019] S101. Obtain the environmental layout of the target factory and build a BIM model of the ventilation integrated pipeline based on national environmental protection standards;

[0020] S102. Draw the first version of the BIM model of the integrated ventilation pipeline, determine the duct path, divide the sections and loops of the duct system and number them;

[0021] S103. Derive the pipe diameter length, inner diameter and wall thickness of each ventilation pipe according to the first version of the ventilation integrated pipeline BIM model, and establish a dimension information library of the ventilation pipe;

[0022] S104. Setting a plurality of detection nodes through information bases of various dimensions of the ventilation pipes.

[0023] Furthermore, the specific process of determining and generating the temperature reduction control signal and the temperature increase control signal is as follows:

[0024] S501, obtaining real-time environmental data C through a temperature sensor, wherein the environmental data C is the real-time temperature Ti outside the factory;

[0025] S502: if Ti is less than Tmin, a temperature increase control signal is generated and sent to the intelligent control unit;

[0026] S503: If Ti is greater than Tmax, a temperature reduction control signal is generated and sent to the intelligent control unit.

[0027] A ventilation method for a building space ventilation energy-saving system based on a composite air duct, comprising the following steps:

[0028] Step 1: Obtain the duct path distribution data in the environmental layout diagram of the target factory, build a ventilation integrated pipeline BIM model based on the national environmental protection standards and duct path distribution data, determine the duct path, number each pipe section and loop in the branch path, and mark the detection node according to the ventilation integrated pipeline BIM model;

[0029] Step 2: Obtain environmental data B of the ventilation duct outlet, environmental data C outside the factory, and environmental data D of each detection node in the ventilation duct, and send the environmental data B, environmental data C outside the factory, and environmental data D of each detection node in the ventilation duct to the information analysis unit;

[0030] Step 3: Establish and analyze the normal ventilation network model. The normal ventilation network model is established based on the environmental conditions of sunny and windless days. By substituting the real-time ambient temperature outside the factory under normal conditions into the objective function, the standard output temperature of the ventilation pipe outlet is calculated.

[0031] Step 4: Obtain environmental data D, which includes the pipe temperature Td and the pipe gas flow data Qd at the detection node in the ventilation pipe. The pipe temperature influence factor is calculated based on the pipe temperature Td and the pipe gas flow data Qd. The normal output temperature of the ventilation pipe outlet is calculated based on the pipe temperature influence factor. The temperature influence coefficient outside the factory is calculated based on the standard output temperature of the ventilation pipe outlet and the environmental data C.

[0032] Step 5: Obtain the standard production temperature required by each workshop in the factory, calculate the output temperature range of the ventilation pipe outlet based on the standard production temperature and the temperature influence coefficient outside the factory, compare the output temperature range of the ventilation pipe outlet with the environmental data C to determine the change of the environment outside the factory, and generate a temperature increase control signal and a temperature decrease control signal based on the determination result;

[0033] Step 6: After receiving the temperature increase regulation signal, the output temperature of the ventilation pipe port is increased, and after receiving the temperature decrease regulation signal, the output temperature of the ventilation pipe port is decreased.

[0034] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0035] The present invention obtains the environmental layout diagram of the target factory, builds a ventilation integrated pipeline BIM model, and then establishes a size information library of the ventilation pipe. A number of detection nodes are set according to the size information library. By setting the detection nodes, the temperature and flow rate of each detection node can be detected in real time, and then the temperature influence factor in the pipeline is calculated. In combination with the standard output temperature of the ventilation pipe outlet and the ambient temperature outside the factory, the temperature influence coefficient outside the factory is calculated. According to the environmental conditions required by the factory workshop and the changes in the outdoor environment, the output of the composite air duct temperature is adjusted in real time to achieve environmental protection and energy saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a process of a building space ventilation energy-saving system based on a composite air duct disclosed in the present invention is shown;

[0037] Figure 2 A schematic flow chart of the ventilation method steps of a building space ventilation energy-saving system based on a composite air duct disclosed in the present invention is shown; DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] like Figure 1 As shown, a building space ventilation energy-saving system based on a composite air duct and a method thereof include a duct marking unit, an information collection unit, an information analysis unit and an intelligent control unit;

[0041] The pipeline marking unit obtains the duct path distribution data in the environmental layout diagram of the target factory, builds a ventilation integrated pipeline BIM model based on the national environmental protection standards and duct path distribution data, determines the duct path, numbers each pipe section and loop in the branch path, and marks the detection node according to the ventilation integrated pipeline BIM model;

[0042] The specific working process of the pipeline marking unit is:

[0043] S101. Obtain the environmental layout of the target factory and build a BIM model of the ventilation integrated pipeline based on national environmental protection standards;

[0044] S102. Draw the first version of the BIM model of the integrated ventilation pipeline, determine the duct path, divide the sections and loops of the duct system and number them;

[0045] S103. Derive the pipe diameter length, inner diameter and wall thickness of each ventilation pipe according to the first version of the ventilation integrated pipeline BIM model, and establish a dimension information library of the ventilation pipe;

[0046] S104, setting a plurality of detection nodes through the information base of each size of the ventilation pipe;

[0047] The specific process of setting up the detection node is:

[0048] S201, obtaining a ventilation integrated pipeline BIM model, and dividing all ventilation ducts into high-temperature zone ducts, medium-temperature zone ducts, and low-temperature zone ducts based on the ventilation integrated pipeline BIM model;

[0049] S202, according to the pipe diameter length L1 of the high temperature zone pipe in the ventilation integrated pipeline BIM model, the inner diameter r1 of the ventilation pipe and the wall thickness d1 of the ventilation pipe, preset the detection node interval Ra: Where b1 is a constant;

[0050] S203, according to the pipe diameter length L2 of the medium temperature zone pipe in the ventilation integrated pipeline BIM model, the inner diameter r2 of the ventilation pipe and the wall thickness d2 of the ventilation pipe, preset the detection node interval Rb: Where b2 is a constant;

[0051] S204. According to the pipe diameter length L1 of the high temperature zone pipe in the ventilation integrated pipeline BIM model, the inner diameter r1 of the ventilation pipe, and the wall thickness d1 of the ventilation pipe, the detection node interval Rc is preset: Where b3 is a constant;

[0052] The information collection unit includes an in-factory data collection module, an out-factory environment data collection module, an out-factory data collection module, and a ventilation duct data collection module;

[0053] The in-plant data acquisition module is used for the environmental data B at the outlet of the ventilation pipe, and sends the environmental data B to the information analysis unit;

[0054] The off-site data collection module is used to collect the off-site environmental data C and send the environmental data C to the information analysis unit;

[0055] The data acquisition module in the ventilation duct is used to collect the environmental data D of each detection node in the ventilation duct and send the environmental data D to the information analysis unit;

[0056] The information analysis unit includes a model building module, a data analysis module and a parameter analysis module;

[0057] The data analysis module is used to obtain environmental data D, which includes the pipe temperature Td and the pipe gas flow data Qd at the detection node in the ventilation pipe, and calculate the pipe temperature influence factor based on the pipe temperature Td and the pipe gas flow data Qd;

[0058] The specific process of finding the temperature influencing factor in the pipeline is:

[0059] S301, obtaining the temperature of each detection node in the ventilation duct through a temperature sensor as Td1, Td2, Td3, ..., Tdn;

[0060] S302, obtaining the air flow of each detection node in the ventilation duct through a flow sensor as Qd1, Qd2, Qd3, ..., Qdn;

[0061] S303, obtaining the temperature Tc of the ventilation pipe outlet and the ambient temperature T0 outside the factory, and calculating the temperature influencing factor in the pipe by the formula: Among them, Tk is the temperature influence factor, T0 is the ambient temperature outside the factory, e and c are proportional coefficients, and the temperature influence factor in the pipeline is used to reflect the temperature loss coefficient in the pipeline in the ventilation energy-saving system;

[0062] Calculate the normal output temperature of the ventilation pipe outlet according to the temperature influence factor in the pipeline, and calculate the temperature influence coefficient outside the factory according to the standard output temperature of the ventilation pipe outlet and the environmental data C;

[0063] The specific process of calculating the temperature influence coefficient outside the factory is:

[0064] According to the real-time ambient temperature Ti outside the factory and the standard output temperature Toub of the ventilation pipe, the temperature influence coefficient outside the factory is calculated according to the following formula: Wherein, i = 1, 2, 3, ..., n, α is a constant;

[0065] The model building module is used to build and analyze the normal ventilation network model. The normal ventilation network model is built based on the environmental conditions of sunny and windless days. By substituting the real-time ambient temperature outside the factory under normal conditions into the objective function, the standard output temperature of the ventilation pipe outlet is calculated.

[0066] The specific process of calculating the standard output temperature of the ventilation pipe outlet is:

[0067] Based on the normal environment data C and the normal ventilation pipe outlet temperature Tou, the environment data C includes the factory external environment temperature Tin, and the normal ventilation pipe network model is established. Its objective function can be expressed as:

[0068] Wherein, f(T) represents the objective function, Tou represents the outlet temperature of the ventilation pipe under normal conditions, u = 1, 2, 3, ..., U, U represents the number of test simulations, and Tk is the temperature influence coefficient outside the factory;

[0069] The real-time ambient temperature Tin outside the factory under normal conditions is obtained multiple times through the temperature sensor, and the standard output temperature Toub of the ventilation pipe outlet is obtained after being substituted into the objective function;

[0070] The parameter analysis module is used to obtain the standard production temperature required by each workshop in the factory. The standard production temperature is set based on the production needs and production standards in the workshop. The standard production temperature is obtained from the production factor manual in the factory. Based on the standard production temperature and the temperature influence coefficient outside the factory, the output temperature range of the ventilation pipe is calculated;

[0071] The specific process of finding the output temperature range of the ventilation pipe is:

[0072] S401, obtaining the minimum production temperatures Ta1, Ta2, Ta3, ..., Tap required by each workshop in the factory;

[0073] S402, averaging the minimum production temperatures required by all workshops to obtain the minimum average temperature Taq;

[0074] S403, obtaining the maximum production temperatures Tb1, Tb2, Tb3, ..., Tbp required by each workshop in the factory;

[0075] S404, averaging the maximum production temperatures required by all workshops to obtain the maximum average temperature Tbq;

[0076] S405, through the formula: Among them, Tmin is the minimum output temperature of the ventilation pipe;

[0077] S406, through the formula: Among them, Tmax is the maximum output temperature of the ventilation pipe outlet, and the ventilation pipe outlet output temperature range (Tmin, Tmax) is obtained;

[0078] Compare the output temperature range of the ventilation pipe outlet with the environmental data C to determine the change of the environment outside the factory, generate a temperature increase control signal and a temperature decrease control signal based on the determination result, and send the temperature increase control signal and the temperature decrease control signal to the intelligent control unit;

[0079] The specific process of determining and generating the cooling control signal and the heating control signal is as follows:

[0080] S501, obtaining real-time environmental data C through a temperature sensor, where the environmental data C is the real-time temperature Ti outside the factory;

[0081] S502: if Ti is less than Tmin, a temperature increase control signal is generated and sent to the intelligent control unit;

[0082] S503: If Ti is greater than Tmax, a cooling control signal is generated and sent to the intelligent control unit;

[0083] The intelligent control unit includes a temperature increase adjustment module and a temperature decrease adjustment module. The temperature increase adjustment module controls the output temperature of the ventilation pipe port by receiving a temperature increase adjustment signal.

[0084] The temperature reduction regulation module controls and lowers the output temperature of the ventilation pipe opening by receiving the temperature reduction regulation signal.

[0085] Embodiment 2:

[0086] like Figure 2 As shown, a ventilation method of a building space ventilation energy-saving system based on a composite air duct comprises the following steps:

[0087] Step 1: Obtain the duct path distribution data in the environmental layout diagram of the target factory, build a ventilation integrated pipeline BIM model based on the national environmental protection standards and duct path distribution data, determine the duct path, number each pipe section and loop in the branch path, and mark the detection node according to the ventilation integrated pipeline BIM model;

[0088] Step 2: Obtain environmental data B of the ventilation duct outlet, environmental data C outside the factory, and environmental data D of each detection node in the ventilation duct, and send the environmental data B, environmental data C outside the factory, and environmental data D of each detection node in the ventilation duct to the information analysis unit;

[0089] Step 3: Establish and analyze the normal ventilation network model. The normal ventilation network model is established based on the environmental conditions of sunny and windless days. By substituting the real-time ambient temperature outside the factory under normal conditions into the objective function, the standard output temperature of the ventilation pipe outlet is calculated.

[0090] Step 4: Obtain environmental data D, which includes the pipe temperature Td and the pipe gas flow data Qd at the detection node in the ventilation pipe. The pipe temperature influence factor is calculated based on the pipe temperature Td and the pipe gas flow data Qd. The normal output temperature of the ventilation pipe outlet is calculated based on the pipe temperature influence factor. The temperature influence coefficient outside the factory is calculated based on the standard output temperature of the ventilation pipe outlet and the environmental data C.

[0091] Step 5: Obtain the standard production temperature required by each workshop in the factory, calculate the output temperature range of the ventilation pipe outlet based on the standard production temperature and the temperature influence coefficient outside the factory, compare the output temperature range of the ventilation pipe outlet with the environmental data C to determine the change of the environment outside the factory, and generate a temperature increase control signal and a temperature decrease control signal based on the determination result;

[0092] Step 6: After receiving the temperature increase regulation signal, the output temperature of the ventilation pipe port is increased, and after receiving the temperature decrease regulation signal, the output temperature of the ventilation pipe port is decreased.

[0093] In summary of the above technical solutions: The present invention obtains the environmental layout diagram of the target factory, builds a ventilation integrated pipeline BIM model, and then establishes a dimension information library of the ventilation pipe. A number of detection nodes are set according to the dimension information library. By setting the detection nodes, the temperature and flow rate of each detection node can be detected in real time, and then the temperature influence factor in the pipeline is calculated. Combined with the standard output temperature of the ventilation pipe outlet and the ambient temperature outside the factory, the temperature influence coefficient outside the factory is calculated. According to the environmental conditions required by the factory workshop and the changes in the outdoor environment, the output of the composite air duct temperature is adjusted in real time to achieve environmental protection and energy saving effects.

[0094] The setting of the threshold and interval size is for the convenience of comparison. The size of the threshold depends on the amount of sample data and the number of bases set by technicians in this field for each group of sample data; as long as it does not affect the proportional relationship between the parameter and the quantized value;

[0095] Those skilled in the art can appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by a device or a combination of computer software and electronic hardware; whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution;

[0096] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A building space ventilation energy-saving system based on a composite air duct, characterized in that: It includes a pipeline marking unit, an information collection unit, an information analysis unit and an intelligent control unit; The pipeline marking unit obtains the duct path distribution data in the environmental layout diagram of the target factory, builds a ventilation integrated pipeline BIM model based on national environmental protection standards and the duct path distribution data, determines the duct path, numbers each pipe section and loop in the branch path, and marks the detection node according to the ventilation integrated pipeline BIM model.

2. The building space ventilation energy-saving system based on composite air duct according to claim 1 is characterized in that: The information collection unit includes an in-factory data collection module, an out-factory environment data collection module, an out-factory data collection module, and a ventilation duct data collection module; The in-plant data acquisition module is used to collect environmental data B at the outlet of the ventilation pipe and send the environmental data B to the information analysis unit; The off-site data acquisition module is used to collect off-site environmental data C and send the environmental data C to the information analysis unit.

3. The building space ventilation energy-saving system based on composite air duct according to claim 2 is characterized in that: The ventilation duct data collection module is used to collect environmental data D of each detection node in the ventilation duct and send the environmental data D to the information analysis unit; The information analysis unit includes a model building module, a data analysis module and a parameter analysis module; The model building module is used to build and analyze a normal ventilation pipe network model. The normal ventilation pipe network model is built based on the environmental conditions of a sunny and windless day. By substituting the real-time ambient temperature outside the factory under normal conditions into the objective function, the standard output temperature of the ventilation pipe outlet is calculated.

4. The building space ventilation energy-saving system based on composite air duct according to claim 3 is characterized in that: The data analysis module is used to obtain environmental data D, which includes the pipe temperature Td and the pipe gas flow data Qd at the detection node in the ventilation pipe. The pipe temperature influence factor is calculated based on the pipe temperature Td and the pipe gas flow data Qd. The normal output temperature of the ventilation pipe outlet is calculated according to the pipe temperature influence factor. According to the standard output temperature of the ventilation pipe outlet and the environmental data C, the temperature influence coefficient outside the factory is calculated.

5. The building space ventilation energy-saving system based on composite air duct according to claim 4 is characterized in that: The parameter analysis module is used to obtain the standard production temperature required by each workshop in the factory, calculate the output temperature range of the ventilation pipe outlet based on the standard production temperature and the temperature influence coefficient outside the factory, compare the output temperature range of the ventilation pipe outlet with the environmental data C to judge the changes in the environment outside the factory, generate a heating control signal and a cooling control signal based on the judgment result, and send the heating control signal and the cooling control signal to the intelligent control unit.

6. The building space ventilation energy-saving system based on composite air duct according to claim 5 is characterized in that: The intelligent control unit includes a temperature increase adjustment module and a temperature decrease adjustment module, and the temperature increase adjustment module controls the output temperature of the ventilation pipe port by receiving a temperature increase adjustment signal; The temperature reduction regulation module controls and lowers the output temperature of the ventilation pipe opening by receiving the temperature reduction regulation signal.

7. The building space ventilation energy-saving system based on composite air duct according to claim 1 is characterized in that: The specific working process of the pipeline marking unit is: S101. Obtain the environmental layout of the target factory and build a BIM model of the ventilation integrated pipeline based on national environmental protection standards; S102. Draw the first version of the BIM model of the integrated ventilation pipeline, determine the duct path, divide the sections and loops of the duct system and number them; S103. Derive the pipe diameter length, inner diameter and wall thickness of each ventilation pipe according to the first version of the ventilation integrated pipeline BIM model, and establish a dimension information library of the ventilation pipe; S104. Setting a plurality of detection nodes through information bases of various dimensions of the ventilation pipes.

8. A ventilation method for a building space ventilation energy-saving system based on a composite air duct according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Obtain the duct path distribution data in the environmental layout diagram of the target factory, build a ventilation integrated pipeline BIM model based on the national environmental protection standards and duct path distribution data, determine the duct path, number each pipe section and loop in the branch path, and mark the detection node according to the ventilation integrated pipeline BIM model; Step 2: Obtain environmental data B of the ventilation duct outlet, environmental data C outside the factory, and environmental data D of each detection node in the ventilation duct, and send the environmental data B, environmental data C outside the factory, and environmental data D of each detection node in the ventilation duct to the information analysis unit; Step 3: Establish and analyze the normal ventilation network model. The normal ventilation network model is established based on the environmental conditions of sunny and windless days. By substituting the real-time ambient temperature outside the factory under normal conditions into the objective function, the standard output temperature of the ventilation pipe outlet is calculated. Step 4, obtaining environmental data D, wherein the environmental data D includes the pipe temperature Td and the pipe gas flow data Qd at the detection node in the ventilation pipe, calculating the pipe temperature influence factor based on the pipe temperature Td and the pipe gas flow data Qd, calculating the normal output temperature of the ventilation pipe port according to the pipe temperature influence factor, and calculating the temperature influence coefficient outside the factory according to the standard output temperature of the ventilation pipe port and the environmental data C; Step 5: Obtain the standard production temperature required by each workshop in the factory, calculate the output temperature range of the ventilation pipe outlet based on the standard production temperature and the temperature influence coefficient outside the factory, compare the output temperature range of the ventilation pipe outlet with the environmental data C to determine the change of the environment outside the factory, and generate a temperature increase control signal and a temperature decrease control signal based on the determination result; Step 6: After receiving the temperature increase regulation signal, the output temperature of the ventilation pipe port is increased, and after receiving the temperature decrease regulation signal, the output temperature of the ventilation pipe port is decreased.

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