Fixed-thickness drawing method of metal plate for central air conditioning unit

Abstract

The invention provides a fixed-thickness drawing method of a metal plate for a central air conditioning unit. The fixed-thickness drawing method comprises the following steps: data filling: filling data of a specified column of an Excel file, calibrating the column by using a serial number, and performing parameter input on a panel number, an inner plate metal plate material, an outer plate metal plate material, W, H and quantity required by the metal plate; file importing: importing the filled Excel file into software, and extracting specified column unit data by the software; extracting data; the software captures required data for compiling according to the read data; and file output: after compilation is completed, software outputs a drawing format to a specified folder. The drawing output method has the advantages that the operation problems that a drawing is prone to stretching errors, operation repeatability, frequent modification, low efficiency and the like due to existing auxiliary software are solved, and the drawing efficiency is greatly improved; errors caused by manual drawing stretching can be avoided; according to the drawing method, different thickness bending coefficients are considered, so that the drawing error is smaller.

Description

Technical Field

[0001] This invention belongs to the technical field of central air conditioning unit equipment, and in particular relates to a drawing method for fixing the thickness of sheet metal in central air conditioning units. Background Technology

[0002] Currently, among the air handling equipment of central air conditioning, modular air handling units, as terminal air handling equipment, have advantages such as complete functions, convenient and flexible selection and combination, and novel structural design, and are widely used in various occasions.

[0003] Modular air conditioning units are mainly composed of one or more functional sections such as mixing, filtration, heating, cooling, dehumidification and humidification, noise reduction, heat recovery, and air supply. Their appearance is formed by splicing together panel structures such as labyrinth type and frame type.

[0004] Currently, the foam board and sheet metal of its outer surface box mainly rely on the customized dimensions of auxiliary design software such as AutoCAD and SolidWorks.

[0005] However, existing auxiliary software has problems such as easy stretching errors in drawings, repetitive operations, frequent modifications, and low efficiency. Summary of the Invention

[0006] In view of this, the present invention aims to propose a drawing method for fixing the thickness of sheet metal for central air conditioning units, so as to solve the problems of easy stretching errors in drawings, repetitive operation, frequent modification and low efficiency caused by existing auxiliary software.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A method for producing drawings of sheet metal fixing thickness for central air conditioning units includes the following steps: S1. Data entry: Fill in the specified column data in the Excel file, label the column with serial numbers, and input parameters such as panel number, inner panel material, outer panel material, W, H, and quantity required for sheet metal work; S2. File Import: Import the completed Excel file into the software, and the software will extract data from the specified column cells. S3, Data Extraction; The software extracts and compiles the required data based on the read data. S4. File output: After compilation, the software outputs drawing format to the specified folder.

[0008] Furthermore, in step S1, the sheet metal includes an inner panel and an outer panel, the inner panel is made of 316L stainless steel, and the outer panel is made of silver-colored coated steel.

[0009] Furthermore, in step S1, the thickness of the inner plate is 0.5 mm, and the thickness of the outer plate is 0.8 mm.

[0010] Furthermore, in step S3, the software is compiled based on the logic table of the inner panel unfolded sheet metal drawing, the logic table of the inner panel formed sheet metal drawing, the logic table of the outer panel unfolded sheet metal drawing, and the logic table of the outer panel formed sheet metal drawing.

[0011] Furthermore, in step S3, the parameters of the inner panel unfolded sheet metal drawing logic table are X2, X2, Y2, and Y3; the calculation formulas for X2, X2, Y2, and Y3 are as follows: X2 = X1 + 2 × YA - 4 × t; X3 = YA - t; Y2 = Y1 + 2 × XA - 4 × t; Y3 = XA - t; Where X2 is the length of the short side in the unfolded dimension of the inner panel, and t is the thickness of the inner panel sheet metal; X3 is the dimension of the notch on the bent flange side in the short side length of the unfolded dimension; Y2 is the length of the long side in the unfolded dimension of the inner panel; Y3 is the dimension of the notch on the bent flange side in the long side length of the unfolded dimension; XA and YA are both the bending thickness in the formed dimension of the inner panel.

[0012] Furthermore, in step S3, the parameters of the inner panel forming sheet metal drawing logic table are X1, X, Y1, Y, and XA; the calculation formulas for X1, X, Y1, Y, and XA are as follows: X1 = X - 58.2; X: A≤B, X=A otherwise=B; Y1 = Y - 58.2; Y: A≤B, Y=B, otherwise=A; XA=27.8; Where X1 is the length of the short side in the inner panel forming dimension; Y1 is the length of the long side in the inner panel forming dimension; XA and YA are both bending thicknesses in the inner panel forming dimension; A and B are W and H in the foaming list.

[0013] Furthermore, in step S3, the parameters of the outer panel unfolded sheet metal drawing logic table are X2, X3, X4, X5, X6, X7, XD, XE, Y2, Y3, Y4, Y5, Y6, Y7, YD, YE, ΦC, and ΦD; the calculation formulas for X2, X3, X4, X5, X6, X7, XD, XE, Y2, Y3, Y4, Y5, Y6, Y7, YD, YE, ΦC, and ΦD are respectively: X2 = X1 + 2 × YA + 2 × XB - 8 × t; X3 = 22 - t; X4 = 22 - t; X5 = YA - 2 × t; X6 = YA + XB + XC - 4 × t; X7 = XF + XB - 2 × t; XD=300; XE: When 0 < XE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < XE ≤ 300, they are not merged. Y2 = Y1 + 2 × XA + 2 × YB - 8 × t; Y3 = 22 - t; Y4 = 22 - t; Y5 = XA - 2 × t; Y6 = XA + YB + YC - 4 × t; Y7 = Y2 / 2; YD=300; YE: When 0 < YE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < YE ≤ 300, they are not merged. ΦC=12.1; ΦD=14; Where X2 is the length of the short side in the unfolded dimension of the outer plate; X3 is the dimension of the notch on the bent flange in the short side of the unfolded dimension; X4 is the dimension of the bent flange in the long side of the unfolded dimension of the outer plate; X5 is the dimension of the flange in the long side of the unfolded dimension of the outer plate; X6 is the dimension from the opening to the outer frame edge in the long side of the unfolded dimension of the outer plate; X7 is the dimension from the injection hole to the outer frame edge in the long side of the unfolded dimension of the outer plate; XD is the hole spacing between the two holes in the short side of the unfolded dimension of the outer plate; XE is the opening from both sides to the middle in the short side of the unfolded dimension of the outer plate; Y2 is the length of the unfolded dimension of the outer plate. Side length; Y3 is the dimension of the bent flange notch in the long side of the unfolded dimension; Y4 is the dimension of the bent flange in the short side of the unfolded dimension of the outer plate; Y5 is the dimension of the flange in the short side of the unfolded dimension of the outer plate; Y6 is the dimension from the opening to the outer frame in the short side of the unfolded dimension of the outer plate; Y7 is the dimension from the injection hole to the long outer frame in the long side of the unfolded dimension of the outer plate; YD is the hole spacing between two holes in the long side of the unfolded dimension of the outer plate; YE is the opening from both sides towards the middle in the long side of the unfolded dimension of the outer plate; ΦC is the diameter of the fixing hole; ΦD is the diameter of the injection hole.

[0014] Furthermore, in step S3, the parameters of the outer panel forming sheet metal drawing logic table are X1, X, YA, XB, XC, XD, XE, XF, Y1, Y, XA, YB, YC, YD, YE, YF, ΦC, and ΦD; the calculation formulas for X1, X, YA, XB, XC, XD, XE, XF, Y1, Y, XA, YB, YC, YD, YE, YF, ΦC, and ΦD are respectively: X1 = X - 3; X: A≤B, X=A otherwise=B; YA=47.25; XB=22; XC=12; XD=300; XE: When 0 < XE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < XE ≤ 300, they are not merged. XF=23.625; Y1 = Y - 3; Y: A≤B, Y=B, otherwise=A; XA=47.25; YB=22; YC=12; YD=300; YE: When 0 < YE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < YE ≤ 300, they are not merged. YF = Y1 / 2; ΦC=12.1; ΦD=14; Where X1 is the length of the short side in the outer panel forming dimension; YA is the bending thickness of the short side in the outer panel forming dimension; XB is the flange edge of the short side in the outer panel forming dimension; XC is the distance from the fixing hole to the edge in the short side of the outer panel forming dimension; XD is the hole spacing between the two holes in the short side of the outer panel forming dimension; XE is the opening from both sides to the middle in the short side of the outer panel forming dimension; XF is the distance from the injection hole to the edge in the long side of the outer panel forming dimension; Y1 is the length of the long side in the outer panel forming dimension. Length; XA is the bending thickness of the long side in the outer panel forming dimension; YB is the flange edge of the long side bending in the outer panel forming dimension; YC is the distance from the fixing hole to the edge in the long side dimension of the outer panel forming dimension; YD is the hole spacing between two holes in the long side dimension of the outer panel forming dimension; YE is the opening from both sides to the middle in the long side dimension of the outer panel forming dimension; YF is the dimension from the injection hole to the long side outer frame in the long side dimension of the outer panel forming dimension; ΦC is the diameter of the fixing hole; ΦD is the diameter of the injection hole.

[0015] Compared with existing technologies, the drawing method for fixing the thickness of sheet metal for central air conditioning units described in this invention has the following advantages: The present invention provides a drawing method for fixing the thickness of sheet metal for central air conditioning units. This drawing method solves the problems of easy stretching errors, repetitive operation, frequent modification, and low efficiency caused by existing auxiliary software, and greatly improves the drawing efficiency; it can avoid errors caused by manually stretching drawings; this drawing method takes into account the bending coefficient of different thicknesses, so that the drawing error is smaller. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall method flow according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the CAD shape of the inner plate unfolded after being output by the software according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the CAD shape of the inner plate forming drawing output by the software according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the CAD shape of the outer panel unfolded sheet metal drawing output by the software according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the CAD shape of the outer panel forming sheet metal drawing output by the software according to an embodiment of the present invention. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 5 As shown, the drawing method for fixing the thickness of a central air conditioning unit with sheet metal includes the following steps: Step 1: Data entry; Step 2: Import the file; Step 3: Data extraction; Step 4: Output the file.

[0022] In a preferred embodiment of the present invention, the first step is: data entry; Enter the data for the specified columns in the Excel file. The columns are labeled with serial numbers. Input the parameters for the required panel number, inner panel sheet metal material, outer panel sheet metal material, W (outer panel sheet metal length forming dimension), H (outer panel sheet metal width forming dimension), and quantity (highlighted in yellow).

[0023] In a preferred embodiment of the present invention, the second step is: file import; Import the completed Excel file into the software, and the software will extract data from the specified column cells.

[0024] In a preferred embodiment of the present invention, the third step is: data extraction; The software extracts the required data based on the read data and compiles it.

[0025] In a preferred embodiment of the present invention, the fourth step is: file output; After compilation, the software outputs a drawing in CAD.DWG format to the specified folder.

[0026] The beneficial effects of this invention are: This drawing output method solves the problems of easy stretching errors in drawings, repetitive operations, frequent modifications, and low efficiency caused by existing auxiliary software, greatly improving the drawing efficiency; it can avoid errors caused by manually stretching drawings; this drawing output method takes into account the bending coefficient of different thicknesses, making the drawing error smaller.

[0027] Example 1 The drawing method for fixing the thickness of central air conditioning units with sheet metal includes the following steps: Step 1: Data entry; Table 1 shows the fixed format for importing the 80mm thick foam list.

[0028] Table 1 1 2 3 4 5 6 7 8 Panel number Inner panel sheet metal material Outer sheet metal material Inner panel sheet metal thickness Outer panel sheet metal thickness W H quantity B1 316L stainless steel sheet Silver-colored plate 0.5 0.8 1065 2600 1 Step 2: Import the file; Import the completed Excel file into the software, and the software will extract data from the specified column cells.

[0029] Step 3: Data Extraction: Extract data based on the logic tables of the inner panel unfolded sheet metal drawing, the inner panel formed sheet metal drawing, the outer panel unfolded sheet metal drawing, and the outer panel formed sheet metal drawing. Step 4: File output, output the CAD shape of each component separately.

[0030] Data extraction: Table 2 is the logic table of the inner plate unfolded sheet metal drawing in this invention, used for software logic.

[0031] Table 2 Where X2 is the short side length in the unfolded inner panel dimension, which is equal to the short side length X1 in the formed dimension, plus the two bending thicknesses YA in the formed dimension, minus the deduction coefficient of four sheet metal thicknesses t, and t is equal to the inner panel sheet metal thickness in the Excel file. X3 is equal to YA in the inner panel forming dimension, minus the inner panel sheet metal thickness t from the Excel file. Y2, the length of the long side in the unfolded inner panel, is equal to the length of the long side in the formed dimension Y1, plus the two bending thicknesses XA in the formed dimension, minus the deduction factor of four sheet metal thicknesses t; Y3 is equal to XA in the inner panel forming dimension, minus the inner panel sheet metal thickness t from the Excel file.

[0032] File output; Figure 2 This is the CAD shape of the inner panel after it has been unfolded, as output by the software.

[0033] Data extraction; Table 3 is the logic table for the inner panel forming sheet metal drawing; Table 3 X1 is the length of the shorter side in the inner panel forming dimension, which is equal to X minus 58.2. X is equal to A or B. If A is less than or equal to B, X is equal to A. Otherwise, X is equal to B. A and B are the W and H dimensions in Excel. Y1 is the length of the longer side in the inner panel forming dimension, which is equal to Y minus 58.2. Y is equal to A or B. If A is less than or equal to B, Y is equal to B; otherwise, Y is equal to A. XA and YA represent the bending thickness in the inner panel forming dimensions.

[0034] File output; Figure 3 This refers to the CAD shape of the inner panel after it has been output by the software.

[0035] Data extraction; Table 4 is the logic table for the outer panel unfolded sheet metal drawing; Table 4 X2, the length of the short side in the unfolded dimension of the outer panel, is equal to the length of the short side in the formed dimension of the outer panel X1, plus the two bending thicknesses YA in the formed dimension of the outer panel, plus the two bending flange edges XB in the formed dimension of the outer panel, minus the deduction factor of 8 sheet metal thicknesses t, t is equal to the sheet metal thickness of the outer panel in the Excel file; X3, the dimension of the bent flange notch in the short side length of the unfolded dimension, is equal to the fixed value 22 minus one sheet metal thickness t; X4, the dimension of the bent flange edge in the long side of the unfolded outer panel, is equal to a fixed value of 22 minus one sheet metal thickness t; X5, the flange dimension in the long side of the unfolded outer plate, is equal to the bending thickness YA in the short side of the formed outer plate, minus the plate thickness t of 2 bending deduction factors; X6, the length of the long side of the outer panel unfolded dimension from the opening to the edge of the outer frame, is equal to the bending thickness YA of the short side dimension of the outer panel formed dimension, plus the bending flange edge XB of the short side dimension of the outer panel formed dimension, plus the distance XC from the hole to the edge of the short side dimension of the outer panel formed dimension, minus the plate thickness t of 4 bending deduction coefficients. X7, the distance from the injection hole to the edge of the outer frame in the long side of the outer panel unfolded dimension is equal to the distance from the injection hole to the edge in the long side of the outer panel formed dimension XF, plus the bending flange edge XB in the short side of the outer panel formed dimension, minus the plate thickness t of 2 bending deduction factors; XD, the hole spacing between two holes in the shorter side length of the unfolded outer panel, a fixed value of 300; XE, the two sides of the short side of the unfolded outer panel are opened towards the middle. When the remaining distance between the two middle holes is less than 300, the hole spacing is: when the distance between the two middle holes is greater than 0 and less than or equal to 100, the two holes are merged into one hole and placed in the center; when the distance between the two middle holes is greater than 100 and less than or equal to 300, they are not merged. Y2, the length of the long side of the unfolded outer panel, is equal to the length of the long side of the formed outer panel Y1, plus the two bending thicknesses XA in the formed outer panel, plus the two bending flange edges YB in the formed outer panel, minus the deduction factor of 8 sheet metal thicknesses t. Y3, the dimension of the bent flange notch in the long side of the unfolded dimension, is equal to a fixed value of 22 minus a sheet metal thickness t; Y4, the dimension of the bent flange edge in the short side length of the outer panel unfolded dimension, is equal to a fixed value of 22 minus a sheet metal thickness t; Y5, the flange dimension in the short side length of the outer plate unfolded dimension, is equal to the bending thickness XA in the long side dimension of the outer plate formed dimension, minus the plate thickness t of 2 bending deduction factors; Y6, the length of the opening from the edge of the outer frame in the short side of the unfolded outer panel, is equal to the bending thickness XA of the long side in the formed outer panel, plus the bending flange edge YB of the long side in the formed outer panel, plus the distance YC from the hole to the edge in the long side in the formed outer panel, minus the plate thickness t of 4 bending deduction coefficients. Y7, the length of the long side of the outer panel unfolded dimension from the injection hole to the long side of the outer frame, is equal to half of the unfolded dimension of the outer panel Y2; YD, the hole spacing between two holes in the long side of the unfolded outer panel, a fixed value of 300; YE, the two sides of the long side of the unfolded outer panel are opened towards the middle. When the remaining distance between the two middle holes is less than 300, the hole spacing is as follows: when the distance between the two middle holes is greater than 0 and less than or equal to 100, the two holes are merged into one hole and placed in the center; when the distance between the two middle holes is greater than 100 and less than or equal to 300, they are not merged. ΦC, the diameter of the fixed hole, fixed value 12.1; ΦD, the diameter of the injection hole, a fixed value of 14.

[0036] File output; Figure 4 This is the CAD shape of the outer panel unfolded sheet metal drawing output by the software.

[0037] Table 5 is the logic table for the outer panel forming sheet metal drawing; Table 5 X1 is the length of the shorter side in the outer panel forming dimensions. It is equal to X minus 3. X is equal to A or B. If A is less than or equal to B, X is equal to A. Otherwise, X is equal to B. A and B are the W and H dimensions in Excel. YA, the bending thickness of the short side in the outer panel forming dimensions, is a fixed value of 47.25; XB, the short side bending flange edge in the outer panel forming dimension, fixed value 22; XC, the distance from the fixed hole to the edge in the short side dimension of the outer panel forming, fixed value 12; XD, the hole spacing between two holes in the short side length of the outer panel forming dimension, a fixed value of 300; XE, the two holes are opened from the short side of the outer panel forming dimension towards the middle. When the remaining distance between the two middle holes is less than 300, the hole spacing is: when the distance between the two middle holes is greater than 0 and less than or equal to 100, the two holes are merged into one hole and placed in the center; when the distance between the two middle holes is greater than 100 and less than or equal to 300, they are not merged. XF, the length of the long side of the outer panel forming dimension, the distance from the injection hole to the edge, a fixed value of 23.625; Y1 is the length of the longer side in the outer panel forming dimension, which is equal to Y minus 3. Y is equal to A or B. If A is less than or equal to B, Y is equal to B; otherwise, Y is equal to A. XA, the bending thickness of the long side in the outer panel forming dimensions, is a fixed value of 47.25. YB, the long side of the outer panel forming dimension is bent at the flange edge, with a fixed value of 22; YC, the distance from the fixed hole to the edge in the long side dimension of the outer panel forming, fixed value 12; YD, the hole spacing between two holes in the long side of the outer panel forming dimension, a fixed value of 300; YE, the outer panel forming dimensions have holes on both sides towards the middle of the long side. When the remaining distance between the two middle holes is less than 300, the hole spacing is: when the distance between the two middle holes is greater than 0 and less than or equal to 100, the two holes are merged into one hole and placed in the center; when the distance between the two middle holes is greater than 100 and less than or equal to 300, they are not merged. YF, the distance from the injection hole to the long side frame of the outer panel forming dimension, is equal to half of the outer panel forming dimension Y1; ΦC, the diameter of the fixed hole, fixed value 12.1; ΦD, the diameter of the injection hole, a fixed value of 14; t represents the thickness of the outer sheet metal in the Excel file.

[0038] Figure 5 This refers to the CAD shape of the outer panel forming sheet metal drawing output by the software.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for drawing the thickness of sheet metal fixing for central air conditioning units, characterized in that: Includes the following steps: S1. Data entry: Fill in the specified column data in the Excel file, label the column with serial numbers, and input parameters such as panel number, inner panel material, outer panel material, W, H, and quantity required for sheet metal work; S2. File Import: Import the completed Excel file into the software, and the software will extract data from the specified column cells. S3, Data Extraction; The software extracts and compiles the required data based on the read data. S4. File output: After compilation, the software outputs drawing format to the specified folder.

2. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 1, characterized in that: In step S1, the sheet metal includes an inner panel and an outer panel. The inner panel is made of 316L stainless steel, and the outer panel is made of silver-colored coated steel.

3. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 2, characterized in that: In step S1, the thickness of the inner plate is 0.5 mm and the thickness of the outer plate is 0.8 mm.

4. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 2, characterized in that: In step S3, the software is compiled based on the logic table of the inner panel unfolded sheet metal drawing, the logic table of the inner panel formed sheet metal drawing, the logic table of the outer panel unfolded sheet metal drawing, and the logic table of the outer panel formed sheet metal drawing.

5. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 4, characterized in that: In step S3, the parameters of the inner panel unfolded sheet metal drawing logic table are X2, X2, Y2, and Y3; the calculation formulas for X2, X2, Y2, and Y3 are as follows: X2 = X1 + 2 × YA - 4 × t; X3 = YA - t; Y2 = Y1 + 2 × XA - 4 × t; Y3 = XA - t; Where X2 is the length of the short side in the unfolded dimension of the inner panel, and t is the thickness of the inner panel sheet metal; X3 is the dimension of the notch on the bent flange side in the short side length of the unfolded dimension; Y2 is the length of the long side in the unfolded dimension of the inner panel; Y3 is the dimension of the notch on the bent flange side in the long side length of the unfolded dimension; XA and YA are both the bending thickness in the formed dimension of the inner panel.

6. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 4, characterized in that: In step S3, the parameters of the inner panel forming sheet metal drawing logic table are X1, X, Y1, Y, and XA; the calculation formulas for X1, X, Y1, Y, and XA are as follows: X1 = X - 58.2; X: A≤B, X=A otherwise=B; Y1 = Y - 58.2; Y: A≤B, Y=B, otherwise=A; XA=27.8; Where X1 is the length of the short side in the inner panel forming dimension; Y1 is the length of the long side in the inner panel forming dimension; XA and YA are both bending thicknesses in the inner panel forming dimension; A and B are W and H in the foaming list.

7. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 4, characterized in that: In step S3, the parameters of the outer panel unfolded sheet metal drawing logic table are X2, X3, X4, X5, X6, X7, XD, XE, Y2, Y3, Y4, Y5, Y6, Y7, YD, YE, ΦC, and ΦD; the calculation formulas for X2, X3, X4, X5, X6, X7, XD, XE, Y2, Y3, Y4, Y5, Y6, Y7, YD, YE, ΦC, and ΦD are as follows: X2 = X1 + 2 × YA + 2 × XB - 8 × t; X3 = 22 - t; X4 = 22 - t; X5 = YA - 2 × t; X6 = YA + XB + XC - 4 × t; X7 = XF + XB - 2 × t; XD=300; XE: When 0 < XE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < XE ≤ 300, they are not merged. Y2 = Y1 + 2 × XA + 2 × YB - 8 × t; Y3 = 22 - t; Y4 = 22 - t; Y5 = XA - 2 × t; Y6 = XA + YB + YC - 4 × t; Y7 = Y2 / 2; YD=300; YE: When 0 < YE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < YE ≤ 300, they are not merged. ΦC=12.1; ΦD=14; Where X2 is the length of the short side in the unfolded dimension of the outer plate; X3 is the dimension of the notch on the bent flange in the short side of the unfolded dimension; X4 is the dimension of the bent flange in the long side of the unfolded dimension of the outer plate; X5 is the dimension of the flange in the long side of the unfolded dimension of the outer plate; X6 is the dimension from the opening to the outer frame edge in the long side of the unfolded dimension of the outer plate; X7 is the dimension from the injection hole to the outer frame edge in the long side of the unfolded dimension of the outer plate; XD is the hole spacing between the two holes in the short side of the unfolded dimension of the outer plate; XE is the opening from both sides to the middle in the short side of the unfolded dimension of the outer plate; Y2 is the length of the unfolded dimension of the outer plate. Side length; Y3 is the dimension of the bent flange notch in the long side of the unfolded dimension; Y4 is the dimension of the bent flange in the short side of the unfolded dimension of the outer plate; Y5 is the dimension of the flange in the short side of the unfolded dimension of the outer plate; Y6 is the dimension from the opening to the outer frame in the short side of the unfolded dimension of the outer plate; Y7 is the dimension from the injection hole to the long outer frame in the long side of the unfolded dimension of the outer plate; YD is the hole spacing between two holes in the long side of the unfolded dimension of the outer plate; YE is the opening from both sides towards the middle in the long side of the unfolded dimension of the outer plate; ΦC is the diameter of the fixing hole; ΦD is the diameter of the injection hole.

8. The drawing method for fixing the thickness of sheet metal for central air conditioning units according to claim 4, characterized in that: In step S3, the parameters of the outer panel forming sheet metal drawing logic table are X1, X, YA, XB, XC, XD, XE, XF, Y1, Y, XA, YB, YC, YD, YE, YF, ΦC, and ΦD; the calculation formulas for X1, X, YA, XB, XC, XD, XE, XF, Y1, Y, XA, YB, YC, YD, YE, YF, ΦC, and ΦD are as follows: X1 = X - 3; X: A≤B, X=A otherwise=B; YA=47.25; XB=22; XC=12; XD=300; XE: When 0 < XE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < XE ≤ 300, they are not merged. XF=23.625; Y1 = Y - 3; Y: A≤B, Y=B, otherwise=A; XA=47.25; YB=22; YC=12; YD=300; YE: When 0 < YE ≤ 100, the two holes are merged into one hole and placed in the center; when 100 < YE ≤ 300, they are not merged. YF = Y1 / 2; ΦC=12.1; ΦD=14; Where X1 is the length of the short side in the outer panel forming dimension; YA is the bending thickness of the short side in the outer panel forming dimension; XB is the flange edge of the short side in the outer panel forming dimension; XC is the distance from the fixing hole to the edge in the short side of the outer panel forming dimension; XD is the hole spacing between the two holes in the short side of the outer panel forming dimension; XE is the opening from both sides to the middle in the short side of the outer panel forming dimension; XF is the distance from the injection hole to the edge in the long side of the outer panel forming dimension; Y1 is the length of the long side in the outer panel forming dimension. Length; XA is the bending thickness of the long side in the outer panel forming dimension; YB is the flange edge of the long side bending in the outer panel forming dimension; YC is the distance from the fixing hole to the edge in the long side dimension of the outer panel forming dimension; YD is the hole spacing between two holes in the long side dimension of the outer panel forming dimension; YE is the opening from both sides to the middle in the long side dimension of the outer panel forming dimension; YF is the dimension from the injection hole to the long side outer frame in the long side dimension of the outer panel forming dimension; ΦC is the diameter of the fixing hole; ΦD is the diameter of the injection hole.

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