A building fresh air system setting method and setting device

Abstract

The present invention relates to the technical field of building fresh air systems, and specifically discloses a building fresh air system setting method and setting device, the method comprising: establishing a three-dimensional model of a target building, identifying fresh air equipment in the three-dimensional model, and setting coordinate information of a fresh air source; calculating a first distance value through the coordinate information of the fresh air source, and then emitting rays in the spherical direction with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold, obtaining the intersection coordinates of the rays with the pipe features and the room features, determining the fresh air movement line through all the intersection coordinates, calculating the core coefficient of each section of the fresh air pipe, and calculating the value parameters of the fresh air movement line according to the core coefficient. After the fresh air source is set, the present invention can obtain the fresh air movement line corresponding to the building and calculate the value parameters of the fresh air movement line, based on which the construction cost and operating cost of the fresh air system can be reduced, and the most convenient management can be performed while maintaining the air exchange effect.

Description

Technical Field

[0001] The present invention relates to the technical field of building fresh air systems, and in particular to a setting method and a setting device for a building fresh air system. Background Art

[0002] With the rapid development of China's economy, more and more people are paying attention to the quality of their lives, and their requirements for indoor air quality are becoming increasingly higher. In daily life, people can open windows to ventilate and bring in fresh air from outside, thus circulating the air between indoor and outdoor spaces. However, without filtering measures, polluted, toxic and harmful gases and dust particles from the outdoors can also enter the room, polluting the indoor environment. To effectively purify indoor air, many homes and public places are equipped with air purifiers to purify the indoor air. However, the power of indoor air purifiers is generally limited, and they cannot be used simultaneously with window ventilation, otherwise the purification effect will be significantly reduced. This creates a contradiction: opening windows for ventilation fails to purify the air, while purifying the air makes it difficult to ventilate the room.

[0003] To address this issue, fresh air systems are a type of facility that improves indoor air quality and overcomes the drawbacks of window ventilation and air purification. Existing fresh air systems are independent air handling systems consisting of both supply and exhaust systems. They are categorized as either ducted or ductless. Ducted fresh air systems consist of a fresh air blower and ducting accessories. The fresh air blower purifies outdoor air, introducing it into the room, which is then exhausted through ducts. Ductless fresh air systems also use a fresh air blower, which also purifies outdoor air and introduces it into the room. Since carbon dioxide is heavier than air, its oxygen content decreases closer to the ground. For energy efficiency reasons, installing fresh air systems at ground level offers better ventilation. Cool air delivered from floor or wall vents, either from the bottom or from the top, diffuses across the floor surface, creating an organized airflow. This creates a buoyant wake around the heat source, removing heat. This upward wake not only removes the heat load but also carries contaminated air from the work area upward, where it is discharged through the top-mounted exhaust vents. Fresh air, excess heat, and pollutants delivered from the bottom vents move upwards under the driving force of buoyancy and airflow organization, allowing floor-mounted ventilation systems to provide excellent indoor air quality. In addition to considering equipment installation location, the design of larger ventilation systems also requires consideration of how to construct ducts to achieve optimal air exchange and facilitate management. These factors directly impact the cost of installing and operating the ventilation system.

[0004] Therefore, people in this field are in urgent need of finding a new technical solution to solve the above problems. Summary of the Invention

[0005] In response to the technical problems in the prior art, the present invention provides a setting method and a setting device for a building fresh air system.

[0006] A method for setting a building fresh air system, comprising:

[0007] Establishing a three-dimensional model of the target building according to a preset three-dimensional model establishment strategy; the three-dimensional model includes fresh air duct features and room features;

[0008] Marking the fresh air equipment in the three-dimensional model and setting the coordinate information of the fresh air source;

[0009] Calculating a first distance value using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model;

[0010] Emitting rays in the direction of the sphere with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold;

[0011] Obtaining an intersection point between the ray, the pipeline feature, and the room feature, and determining the coordinates of the intersection point;

[0012] Determine the new wind flow line through the coordinates of all intersection points;

[0013] Calculate the core coefficient of each section of the fresh air duct according to the preset core duct calculation strategy and the fresh air flow line;

[0014] The value parameter of the new wind movement line is calculated according to the core coefficient.

[0015] Furthermore, the calculating the first distance value by using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model includes:

[0016] Obtain the coordinate information of the fresh air source and the endpoint coordinates of the outer surface endpoints of the three-dimensional model, which are recorded as A(x0, y0, z0) and B(x n ,y n ,z n ), n is the number of endpoints;

[0017] Calculate the relationship between A(x0,y0,z0) and n endpoints B(x1,y1,z1),B(x2,y2,z2),……,B(x n ,y n ,z n ) to obtain the distance values ​​between l1, l2, ..., l n There are n distance values ​​in total;

[0018] Set l1, l2, ..., l n Sort from small to large, and delete the first p distance values, leaving np distance values; p is an integer, and the value range of p is

[0019] Calculate the average of np distance values ​​as the first distance value.

[0020] Furthermore, the calculating the first distance value by using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model includes:

[0021] Obtain the coordinate information of the fresh air source and the endpoint coordinates of the outer surface endpoints of the three-dimensional model, which are recorded as A(x0, y0, z0) and B(x1, y1, z1), B(x2, y2, z2), ..., B(x n ,y n ,z n ), n is the number of endpoints;

[0022] Randomly select two endpoints from the n endpoints and calculate the midpoint coordinates of the two endpoints, and get a total of n*(n-1) midpoint coordinates;

[0023] Calculate the coordinates of the midpoint closest to A(x0,y0,z0), and obtain the two endpoints corresponding to the midpoint coordinates, which are recorded as B(x i ,y i ,z i ) and B(x j ,y j ,z j );

[0024] Calculate the endpoint B(x i ,y i ,z i ) and endpoint B(x j ,y j ,z j ) and the sum of the distances between each of the remaining endpoints, and obtain the endpoint B(x α ,y α ,z α );

[0025] Calculate A(x0,y0,z0) and B(x α ,y α ,z α ) as the first distance value.

[0026] Furthermore, emitting rays in the direction of the sphere with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold; including:

[0027] In combination with the XYZ coordinate system of the three-dimensional model, the plane where the XY axis of the center point is located is determined as a reference plane, and M first rays are generated on the reference plane at a first preset angle with the center point as the center;

[0028] Taking each first ray as a reference, second rays are generated in sequence, with the angles θ, 2θ, 3θ, ..., m*θ with the first ray; the plane where the first ray and the second ray are located is perpendicular to the reference plane; wherein θ is a second preset angle, and m*θ≤90°.

[0029] Furthermore, the first preset angle and the second preset angle are both 1°.

[0030] Furthermore, determining the new wind flow line through the coordinates of all intersection points includes:

[0031] Randomly select the intersection coordinates, and search for other intersection coordinates in the X-axis, Y-axis, and Z-axis directions respectively; and select the intersection coordinates that change linearly with the value of the intersection coordinate to obtain the first coordinate set;

[0032] Obtain the intersection points with the largest number of linear changes in the first coordinate set and connect them to form a primary movement line;

[0033] Finding an interruption position in the primary moving line, and determining whether the primary moving line where the endpoint of the interruption position is located has another primary moving line that is parallel to the primary moving line and whose distance is less than a preset second distance value;

[0034] If so, delete the interrupted primary movement line;

[0035] If not, connect the endpoints of the interrupted position to form a continuous primary moving line;

[0036] The continuous primary moving line is used as the fresh air moving line;

[0037] The fresh air flow line is divided into pipeline lines and room nodes.

[0038] Furthermore, according to the preset core duct calculation strategy and the fresh air flow line, the core coefficient of each fresh air duct section is calculated; including:

[0039] Get all room nodes and set the value parameter of the room nodes to 1;

[0040] Mark the bifurcation points in the pipeline routing, divide the pipeline routing into several connected pipeline segments, and set the core coefficient of the pipeline connected to the room node to 1;

[0041] Find the pipeline route from each room node to the fresh air source and select the optimal pipeline route; the length of the optimal pipeline route is the shortest one among the pipeline routes from the room to the fresh air source;

[0042] Based on the optimal pipeline routing, when a branch point of the fresh air duct appears starting from the room node, the core coefficient of the previous section of the pipeline is calculated according to the number of branches N and the core coefficient of the section of the pipeline after the node;

[0043] Among them, k front =N+k after ,k front is the core coefficient of the previous pipeline, k after is the core coefficient of the latter section of the pipeline;

[0044] The core coefficients of the pipelines in each optimal pipeline route are summed up as the value parameter.

[0045] Furthermore, it also includes:

[0046] Changing the position of the fresh air device in the three-dimensional model and resetting the coordinates of the fresh air source;

[0047] Re-determine the new air flow line and calculate the value parameters of the new air flow line;

[0048] Compare the value parameters of multiple fresh air circulation routes and select the fresh air circulation route with the best value parameters as the final fresh air circulation route plan;

[0049] Furthermore, it also includes:

[0050] The pipelines where valves are installed are selected according to the core coefficients of each section of pipeline in the final fresh air flow line plan and are marked on the fresh air flow line.

[0051] A building fresh air system setting device, comprising: a three-dimensional model module, a first distance value calculation module, an intersection coordinate determination module, and a fresh air flow line generation module, wherein:

[0052] The three-dimensional model module is connected to the first distance value calculation module and the intersection coordinate determination module; the three-dimensional model module is used to establish a three-dimensional model of the target building according to a preset three-dimensional model establishment strategy; the three-dimensional model includes fresh air duct features and room features; and is used to identify fresh air equipment in the three-dimensional model and set coordinate information of the fresh air source;

[0053] The first distance value calculation module is connected to the three-dimensional model module and the intersection coordinate determination module; the first distance value calculation module is used to calculate the first distance value according to the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model;

[0054] The intersection coordinate determination module is connected to the three-dimensional model module and the first distance value calculation module; the intersection coordinate determination module is used to emit rays in the direction of the spherical surface with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold; and obtain the intersection of the ray with the pipe feature and the room feature, and determine the coordinates of the intersection;

[0055] The fresh air line generation module is connected to the intersection coordinate determination module; the fresh air line generation module is used to determine the fresh air line through all intersection coordinates.

[0056] The present invention provides a method and device for setting a building fresh air system. First, a three-dimensional model of a target building is established according to a preset three-dimensional model establishment strategy. The three-dimensional model includes fresh air duct features and room features. Next, fresh air equipment is identified in the three-dimensional model, and coordinate information of the fresh air source is set. Then, a first distance value is calculated using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model. Then, a ray is emitted in a spherical direction with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold. The intersection of the ray with the duct features and the room features is obtained, and the coordinates of the intersection are determined. Thus, a fresh air flow line is determined through all the intersection coordinates. Then, according to a preset core duct calculation strategy and the fresh air flow line, a core coefficient of each fresh air duct section is calculated. The value parameters of the fresh air flow line are calculated based on the core coefficient. Therefore, after the fresh air source is set, the fresh air flow line corresponding to the building can be known, and the value parameters of the fresh air flow line can be calculated to determine whether the fresh air source setting is reasonable. Based on this, the construction cost and operating cost of the fresh air system can be reduced, and the most convenient management can be achieved while maintaining the air exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 Flowchart (1) of the method for setting a building fresh air system according to an embodiment of the present invention;

[0059] Figure 2 Flowchart (2) of the method for setting a building fresh air system according to an embodiment of the present invention;

[0060] Figure 3 Flowchart (3) of the method for setting a building fresh air system according to an embodiment of the present invention;

[0061] Figure 4 A schematic diagram of a fresh air flow line of a building fresh air system setting method according to an embodiment of the present invention;

[0062] Figure 5 A structural diagram of a building fresh air system setting device according to an embodiment of the present invention;

[0063] Figure 6FIG. 4 is a structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts are within the scope of protection of the present invention.

[0065] A method for setting a building fresh air system according to an embodiment of the present invention is as follows: Figure 1 As shown, the following steps are included:

[0066] Step S10: Building a 3D model of the target building according to a preset 3D model building strategy.

[0067] The three-dimensional model of this embodiment includes fresh air duct features and room features. The three-dimensional model establishment strategy is used to establish the three-dimensional model. Those skilled in the art can implement this step using existing technologies.

[0068] Step S20: Mark the fresh air equipment in the three-dimensional model and set the coordinate information of the fresh air source.

[0069] Set the coordinates of the fresh air source to A(x0,y0,z0).

[0070] Step S30: Calculate a first distance value using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model.

[0071] One implementation of this step is:

[0072] Step S3011: Obtain the coordinate information of the fresh air source and the endpoint coordinates of the outer surface of the three-dimensional model, which are recorded as A(x0, y0, z0) and B(x n ,y n ,z n ), n is the number of endpoints.

[0073] Step S3012: Calculate the relationship between A(x0, y0, z0) and n endpoints B(x1, y1, z1), B(x2, y2, z2), ..., B(x n ,y n ,z n ) to obtain the distance values ​​between l1, l2, ..., l n There are n distance values ​​in total.

[0074] Step S3013: l1, l2, ..., l nSort from small to large, and delete the first p distance values, leaving np distance values; p is an integer, and the value range of p is

[0075] Step S3014: Calculate the average of np distance values ​​as the first distance value.

[0076] This step eliminates smaller distances because some design points located in the middle of the building's 3D model's exterior surface endpoints may affect the first distance value. In this embodiment, the first distance value should be as close as possible to the largest of the n distance values. This will result in more intersections in subsequent steps, leading to a more complete fresh air flow path.

[0077] Another implementation of this step is:

[0078] Step S3021: Obtain the coordinate information of the fresh air source and the endpoint coordinates of the outer surface of the three-dimensional model, which are recorded as A(x0, y0, z0) and B(x1, y1, z1), B(x2, y2, z2), ..., B(x n ,y n ,z n ), n is the number of endpoints.

[0079] Step S3022: randomly select two endpoints from the n endpoints, calculate the midpoint coordinates of the two endpoints, and obtain n*(n-1) midpoint coordinates in total.

[0080] Step S3023: Calculate the coordinates of the midpoint closest to A(x0, y0, z0), and obtain the two endpoints corresponding to the midpoint coordinates, which are recorded as B(x i ,y i ,z i ) and B(x j ,y j ,z j ).

[0081] Step S3024: Calculate endpoint B(x i ,y i ,z i ) and endpoint B(x j ,y j ,z j ) and the sum of the distances between each of the remaining endpoints, and obtain the endpoint B(x α ,y α ,z α ).

[0082] Step S3025: Calculate A(x0, y0, z0) and B(x α ,y α ,zα ) as the first distance value.

[0083] Both of the above methods for calculating the first distance value are acceptable, and those skilled in the art may choose one by themselves during specific implementation.

[0084] Step S40: emitting rays in the direction of the sphere with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold.

[0085] Specifically, this step includes:

[0086] Step S401: In combination with the XYZ coordinate system of the three-dimensional model, the plane where the XY axis of the center point is located is determined as a reference plane, and M first rays are generated on the reference plane at a first preset angle with the center point as the center.

[0087] Step S402: Taking each first ray as a reference, generate second rays in sequence, each with an angle of θ, 2θ, 3θ, ..., m*θ with the first ray; the plane where the first ray and the second ray are located is perpendicular to the reference plane; wherein θ is a second preset angle, and m*θ≤90°.

[0088] In this embodiment, the values ​​of the first preset angle and the second preset angle are preferably equal. The specific values ​​can be determined according to the size of the three-dimensional model and the complexity of the building. For example, the values ​​of the first preset angle and the second preset angle are set to 1°. If the building is relatively complex, the values ​​of the first preset angle and the second preset angle can be made smaller to generate more rays.

[0089] Step S50: Obtain the intersection of the ray, the pipe feature, and the room feature, and determine the coordinates of the intersection.

[0090] When the 3D model is established, the pipes and rooms are presented as "surface" features, so this step obtains the intersection points of the rays and these surfaces and determines the intersection coordinates of each intersection point.

[0091] Step S60: Determine the new wind flow line through the coordinates of all intersection points.

[0092] Specifically, such as Figure 2 As shown, this step includes:

[0093] Step S601: arbitrarily select an intersection coordinate, search for other intersection coordinates in its X-axis, Y-axis, and Z-axis directions, and select intersection coordinates that change linearly with the value of the intersection coordinate to obtain a first coordinate set.

[0094] The “linear change” in this embodiment can be understood as: for example, the intersection coordinates selected are C(x C ,y C ,z C ), there is an intersection point with coordinates D(xD ,y D ,z D ), the x and y values ​​of the two intersection coordinates are equal, and only the z values ​​are different, which means that intersection C and intersection D change linearly in the Z-axis direction. Obtain the coordinates of all intersections that change linearly to obtain the first coordinate set.

[0095] Step S602: Obtain the intersection points with the largest number of linear changes in the first coordinate set and connect them to form a primary moving line.

[0096] Step S603: searching for an interruption position in the primary moving line, and determining whether the primary moving line where the endpoint of the interruption position is located has another primary moving line that is parallel to the primary moving line and whose distance is less than a preset second distance value.

[0097] If the primary moving line where the endpoint of the interruption position is located has another primary moving line that is parallel to it and the distance therebetween is less than the preset second distance value, step S604 is executed.

[0098] Step S604: Delete the interrupted primary movement line.

[0099] Since the pipeline in the three-dimensional model is a three-dimensional structure, in step S40 and step S50, when emitting rays in the spherical direction and obtaining the intersection with the pipeline features and the room features, there will be many intersections on a pipeline, and these intersections will form multiple parallel primary movement lines. Therefore, if there is an interruption position, and the primary movement line where the endpoint of the interruption position is located has other primary movement lines parallel to it and the distance is less than the preset second distance value, the primary movement line in the middle section will be directly deleted.

[0100] If the primary moving line where the endpoint of the interruption position is located has no other primary moving line parallel to it and the distance therebetween is less than the preset second distance value, it means that there is only one primary moving line in the pipeline, so step S605 is executed.

[0101] Step S605: Connecting the endpoints of the interruption position to form a continuous primary movement line.

[0102] This step connects the interrupted locations to form a continuous primary movement line.

[0103] This step should also include determining whether there are parallel primary movement lines in the primary movement lines. If so, only one should be retained.

[0104] Step S606: taking the continuous primary movement line as the fresh air movement line.

[0105] Step S607: Divide the fresh air flow line into pipeline lines and room nodes.

[0106] According to the endpoints and connecting lines of the fresh air flow line, the endpoints can be determined as room nodes and the connecting lines can be determined as pipeline routes.

[0107] Step S70: Calculate the core coefficient of each section of the fresh air duct according to the preset core duct calculation strategy and the fresh air flow line.

[0108] Specifically, such as Figure 3 As shown, this step includes:

[0109] Step S701: Get all room nodes and set the value parameter of the room nodes to 1.

[0110] Step S702: Mark the bifurcation points in the pipeline routing, divide the pipeline routing into several segments of pipelines with connection relationships, and set the core coefficient of the pipeline connected to the room node to 1.

[0111] like Figure 4 As shown, assume that location A is the fresh air source, D1 to D15 are the endpoints or bifurcations of the pipeline, and the small boxes below the pipeline represent rooms. According to the settings in steps S701 and S702, the value parameter of each room node is set to 1, and the core coefficient of each pipeline segment is set to 1. For example, through the settings in this step, the core coefficient of the pipeline segment D2-D3 is 1, and the core coefficient of the pipeline segment D4-D5 is 1.

[0112] Step S703: Find the pipe route from each room node to the fresh air source and select the best pipe route; the length of the best pipe route is the shortest one among the pipe routes from the room to the fresh air source.

[0113] The best pipe route is the one with the shortest distance. For example, the best pipe route from room R1 in the lower right corner (i.e., room D7) to the fresh air source is D7-D8-D9-D2-D1 (or D7-D6-D9-D2-D1, or D7-D6-D5-D13-D10-D2-D1, the distances between the three are equal).

[0114] Step S704: Based on the optimal pipeline routing, when a branch point of the fresh air duct appears starting from the room node, the core coefficient of the previous section of the pipeline is calculated according to the number of branches N and the core coefficient of the section of the pipeline after the node.

[0115] Among them, k front =N+k after ,k front is the core coefficient of the previous pipeline, k after is the core coefficient of the latter section of the pipeline.

[0116] If the optimal pipeline route is D7-D8-D9-D2-D1, then through this step, the core coefficient of the pipeline section D7-D8 is 1, the core coefficient of the pipeline section D8-D9 is 1, and the core coefficient of the pipeline section D9-D2 is 3+1=4. This is because D9-D2 is the previous pipeline section of D8-D9 and has a total of 3 forks at the bifurcation point D9. Continuing to calculate the core coefficient of the pipeline D2-D1, it is 4+4=8. The first 4 represents the total of 4 forks at the bifurcation point D2, and the second 4 represents the core coefficient of the subsequent pipeline section D9-D2.

[0117] Step S705: Sum the core coefficients of the pipelines in each optimal pipeline route as a value parameter.

[0118] The core coefficients of the pipes in the optimal pipe routing of room R1 are summed up to obtain a value parameter of 1+1+4+8=14.

[0119] Through the above steps, the value parameters of the optimal pipeline routing corresponding to each room are calculated.

[0120] Step S80: Calculate the value parameter of the new wind flow line according to the core coefficient.

[0121] The core coefficient of each section of the pipeline is obtained through the above steps. By summing the core coefficients of each section of the pipeline, the value parameters of the fresh air line are obtained.

[0122] Specifically, the embodiment of the present invention further includes the following on the basis of the above embodiment:

[0123] Change the position of the fresh air equipment in the 3D model and reset the coordinates of the fresh air source. Then, determine the fresh air flow line again and calculate the value parameters of the fresh air flow line.

[0124] After changing the location of the fresh air equipment, the distance from each room to the fresh air source will change, so the core coefficient of each section of the pipeline will also change, so the final value parameters of the wind line will also change.

[0125] Afterwards, the value parameters of multiple fresh air routes are compared, and the fresh air route with the best value parameters is selected as the final fresh air route plan.

[0126] For a certain section of pipeline, the higher the value parameter, the more important the pipeline is and the more it belongs to the core pipeline. Therefore, in each fresh air flow line, the more core pipelines there are, the more preferred the location of the fresh air source of the fresh air flow line is.

[0127] Specifically, the embodiment of the present invention further includes the following on the basis of the above embodiment:

[0128] Select the pipelines for installing valves based on the core coefficients of each section of pipeline in the final fresh air flow line plan and mark them on the fresh air flow line.

[0129] Installing valves on more core pipes allows a single valve to control fresh air flow in more rooms, increasing the value of the valve. This minimizes the number of valves, simplifies the control and management of the fresh air system, and reduces the cost of installing the system.

[0130] The embodiment of the present invention also includes a building fresh air system setting device, such as Figure 5 As shown, the setting device 100 includes: a three-dimensional model module 101, a first distance value calculation module 102, an intersection coordinate determination module 103 and a new wind line generation module 104, wherein:

[0131] The three-dimensional model module 101 is connected to the first distance value calculation module 102 and the intersection coordinate determination module 103; the three-dimensional model module 101 is used to establish a three-dimensional model of the target building according to a preset three-dimensional model establishment strategy; the three-dimensional model includes fresh air duct features and room features; and is used to identify the fresh air equipment in the three-dimensional model and set the coordinate information of the fresh air source.

[0132] The first distance value calculation module 102 is connected to the three-dimensional model module 101 and the intersection coordinate determination module 103; the first distance value calculation module 102 is used to calculate the first distance value through the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model.

[0133] The intersection coordinate determination module 103 is connected to the three-dimensional model module 101 and the first distance value calculation module 102; the intersection coordinate determination module 103 is used to emit rays in the spherical direction with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold; and obtain the intersection of the ray with the pipe feature and the room feature, and determine the intersection coordinates.

[0134] The fresh air flow line generation module 104 is connected to the intersection coordinate determination module 103 ; the fresh air flow line generation module 104 is used to determine the fresh air flow line through all the intersection coordinates.

[0135] The building fresh air system setting device of the embodiment of the present invention can be combined with the aforementioned method embodiments when implementing related functions, and will not be repeated here.

[0136] The embodiment of the present invention further includes an electronic device 200, such as Figure 6 Shown, including:

[0137] Memory 201, used for storing computer programs;

[0138] The processor 202 is configured to implement the building fresh air system setting method of the above embodiment when executing the computer program.

[0139] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Those skilled in the art can understand and implement the present invention without inventive effort.

[0140] Through the detailed description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by means of hardware. Based on this understanding, the above technical solution, in essence, or the portion that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, including a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0141] A building fresh air system setting method and setting device according to an embodiment of the present invention first establishes a three-dimensional model of a target building according to a preset three-dimensional model establishment strategy. The three-dimensional model includes fresh air duct features and room features. Fresh air equipment is then identified in the three-dimensional model, and coordinate information of the fresh air source is set. A first distance value is then calculated using the coordinate information of the fresh air source and the coordinates of the endpoints in the three-dimensional model. A ray is then emitted in a spherical direction with the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold. The intersection points of the ray with the duct features and the room features are obtained, and the coordinates of the intersection points are determined. Fresh air flow lines are then determined using the coordinates of all intersection points. A core coefficient is then calculated for each section of the fresh air duct according to a preset core duct calculation strategy and the fresh air flow lines. Value parameters of the fresh air flow lines are calculated based on the core coefficients. After the fresh air source is set, the fresh air flow lines corresponding to the building can be determined, and the value parameters of the fresh air flow lines can be calculated to determine whether the fresh air source settings are reasonable. This can reduce the construction and operating costs of the fresh air system and facilitate management while maintaining air exchange efficiency.

[0142] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A method for setting a building fresh air system, characterized in that: include: Establishing a three-dimensional model of the target building according to a preset three-dimensional model establishment strategy; the three-dimensional model includes fresh air duct features and room features; Marking the fresh air equipment in the three-dimensional model and setting the coordinate information of the fresh air source; Calculating a first distance value using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model; Using the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold, emitting rays in the direction of the spherical surface; Obtaining an intersection point between the ray, the pipeline feature, and the room feature, and determining the coordinates of the intersection point; Determine the new wind flow line through the coordinates of all intersection points; Calculate the core coefficient of each section of the fresh air duct according to the preset core duct calculation strategy and the fresh air flow line; Calculate the value parameter of the new wind movement line according to the core coefficient; Changing the position of the fresh air device in the three-dimensional model and resetting the coordinates of the fresh air source; Re-determine the new air flow line and calculate the value parameters of the new air flow line; Compare the value parameters of multiple fresh air circulation routes and select the fresh air circulation route with the best value parameters as the final fresh air circulation route plan; Select the pipeline where the valve is to be installed according to the core coefficient of each section of the pipeline in the final fresh air flow line plan, and mark it on the fresh air flow line; Wherein, determining the new wind flow line through the coordinates of all intersection points includes: Randomly select the intersection coordinates, and search for other intersection coordinates in the X-axis, Y-axis, and Z-axis directions respectively; and select the intersection coordinates that change linearly with the value of the intersection coordinate to obtain the first coordinate set; Obtain the intersection points with the largest number of linear changes in the first coordinate set and connect them to form a primary movement line; Finding an interruption position in the primary moving line, and determining whether there is another primary moving line parallel to the primary moving line where the endpoint of the interruption position is located and the distance therebetween is less than a preset second distance value; If so, delete the interrupted primary movement line; If not, connect the endpoints of the interrupted position to form a continuous primary moving line; The continuous primary moving line is used as the fresh air moving line; Divide the fresh air flow line into pipeline lines and room nodes; The step of calculating the core coefficient of each section of the fresh air duct according to the preset core duct calculation strategy and the fresh air flow line includes: Get all room nodes and set the value parameter of the room nodes to 1; Mark the bifurcation points in the pipeline routing, divide the pipeline routing into several connected pipeline segments, and set the core coefficient of the pipeline connected to the room node to 1; Find the pipeline route from each room node to the fresh air source and select the optimal pipeline route; the length of the optimal pipeline route is the shortest one among the pipeline routes from the room to the fresh air source; Based on the optimal pipeline routing, when a branch point of the fresh air duct appears starting from the room node, the core coefficient of the previous section of the pipeline is calculated according to the number of branches N and the core coefficient of the section of the pipeline after the node; in, =N+ , is the core coefficient of the previous pipeline, is the core coefficient of the latter section of the pipeline; The core coefficients of the pipelines in each optimal pipeline route are summed up as the value parameter.

2. A building fresh air system setting method according to claim 1, characterized in that: The calculating the first distance value using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model includes: Obtain the coordinate information of the fresh air source and the endpoint coordinates of the outer surface endpoints of the three-dimensional model, which are respectively recorded as and , is the number of endpoints; calculate and endpoints , ,……, The distance value between , ,……, common distance values; Will , ,……, Sort from small to large and put the first distance values ​​are deleted, and the remaining distance value; is an integer, and The value range is [ , ]; calculate The average of the distance values ​​is used as the first distance value.

3. A building fresh air system setting method according to claim 1, characterized in that: The calculating the first distance value using the coordinate information of the fresh air source and the endpoint coordinates in the three-dimensional model includes: Obtain the coordinate information of the fresh air source and the endpoint coordinates of the outer surface endpoints of the three-dimensional model, which are respectively recorded as and , ,……, , is the number of endpoints; exist Select any two endpoints from the endpoints and calculate the midpoint coordinates of the two endpoints. midpoint coordinates; Calculate distance and The nearest midpoint coordinates, and get the two endpoints corresponding to the midpoint coordinates, respectively recorded as and ; Compute endpoint and endpoints The sum of the distances between each of the remaining endpoints and the endpoint where the sum of the distances is the maximum ; calculate and , as the first distance value.

4. A building fresh air system setting method according to claim 2 or 3, characterized in that: Using the coordinates of the fresh air source as the center point, the first distance value as the radius, and a preset interval threshold, emitting rays in the direction of the sphere; including: In combination with the XYZ coordinate system of the three-dimensional model, the plane where the XY axis of the center point is located is determined as a reference plane, and M first rays are generated on the reference plane at a first preset angle with the center point as the center; Taking each first ray as a reference, generate the angles with the first ray as , , ,……, The second ray of the first ray and the second ray is perpendicular to the reference plane; wherein, is the second preset angle, .

5. A building fresh air system setting method according to claim 4, characterized in that: The first preset angle and the second preset angle are both 1°.

6. A building fresh air system setting device, characterized in that: The device is used to implement the building fresh air system setting method as described in any one of claims 1 to 5.

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