CAD system and associated system

Abstract

To solve the problem in which, when information for necessary calculation is incomplete, a CAD system user needs to manually input necessary information or the user needs to manually input the necessary information as additional information.SOLUTION: A CAD system 120 includes a construction unit 131, a transmission unit 122, and a reception unit 123. The construction unit 131 constructs a working drawing of an air conditioning device on the basis of user operation. The transmission unit 122 transmits construction information and equipment information to an outside BIM system 140. The reception unit 123 receives first information on the air conditioning device. The first information is information determined on the basis of the construction information and the equipment information by the BIM system 140.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a CAD system and a linked system equipped with the same. [Background technology]

[0002] Conventionally, CAD systems for drawing construction drawings of facilities have existed. For example, Patent Document 1 (JP Patent Publication 4-90063 A) discloses a two-dimensional CAD system for drawing construction drawings of facilities such as a multi-air conditioner for a building to be installed in a building. Summary of the Invention [Problem to be solved by the invention]

[0003] When drawing construction drawings for equipment using a 2D CAD system, sometimes all the parts necessary for the equipment are not included in the drawing. For example, when drawing construction drawings for refrigeration cycle equipment such as a multi-air conditioner for a building using a 2D CAD system, the user must perform calculations and reflect the calculation results in the drawing based on the model number of the heat source unit, the model number of the utilization unit, and information on the refrigerant piping and joints that make up the connecting pipes that connect those units. These tasks are cumbersome and time-consuming for users.

[0004] In other words, when the information required for the necessary calculations is not complete, such as in a two-dimensional CAD system, the user of the CAD system must manually input the necessary information, or the user must manually input the necessary information as additional information. [Means for solving the problem]

[0005] A CAD system (Computer Aided Design System) according to a first aspect includes a drawing unit, a transmission unit, and a receiving unit. The drawing unit draws construction drawings for the facility based on a user's operation. The transmission unit sends the drawing information and the facility information to an external BIM system (Building Information Modeling System). The receiving unit receives first information regarding the facility. The first information is information determined by the BIM system based on the drawing information and the facility information.

[0006] According to this CAD system, the BIM system determines the primary information, thereby reducing the burden on the user when creating drawings.

[0007] A CAD system according to a second aspect is the CAD system according to the first aspect, further comprising a reflecting unit that reflects the first information in a working drawing. The drawing information includes information on the equipment parts in the working drawing, and the first information includes attribute information of the parts.

[0008] In this CAD system, the receiving unit can receive first information determined by the BIM system from information on equipment parts and part attribute information, and this first information is reflected in the construction drawings, reducing the burden on the user.

[0009] A CAD system of a third aspect is the CAD system of the first aspect, further comprising a reflection unit that reflects the first information in a construction drawing. The equipment is a refrigeration cycle device. The equipment as a refrigeration cycle device has a heat source unit, a utilization unit, and a connecting pipe. The connecting pipe includes a refrigerant piping and a joint. The heat source unit and the utilization unit are connected by the connecting pipe. The drawing information includes information on the route of the connecting pipe in the construction drawing. The first information includes at least one of the size of the refrigerant piping, the model number of the joint, and an additional refrigerant charge amount, which is the additional amount of refrigerant required by the refrigeration cycle device.

[0010] In this CAD system, the user can receive first information about the refrigeration cycle device that is useful when creating drawings of the refrigeration cycle device, and the first information is reflected in the construction drawings, thereby reducing the burden on the user.

[0011] A CAD system according to a fourth aspect is the CAD system according to the third aspect, wherein the construction drawing includes a pipe end symbol attached to an end of the refrigerant piping. The CAD system according to the fourth aspect further includes a setting unit. The setting unit sets at least one piece of information, including a model number of the heat source unit, a length of the connecting pipe, and a number of bends, to the pipe end symbol. The length of the connecting pipe is the length of the connecting pipe from the end of the refrigerant piping attached with the pipe end symbol to the heat source unit. The number of bends is the number of bends of the connecting pipe from the end of the refrigerant piping attached with the pipe end symbol to the heat source unit.

[0012] This CAD system allows information to be set for pipe end symbols, so that this information can be reflected in the drawing information and facility information sent to an external BIM system. This is expected to improve the usefulness of the first information sent from the BIM system.

[0013] A fifth aspect of the collaboration system is a collaboration system according to any one of the first to fourth aspects, and includes a CAD system and a BIM system according to any one of the first to fourth aspects. In this collaboration system, the BIM system performs a calculation to supplement a missing part in the equipment in the construction drawing based on the drawing information and the equipment information, and determines the first information.

[0014] With this linked system, calculations are performed on the BIM system side to make up for missing parts in the facility, so the amount of information stored in the CAD system can be reduced. For example, even if the memory capacity or computing power of the computer in which the CAD system is installed is small, the first information can be received by the receiving unit of the CAD system with the help of the BIM system, and useful first information can be used by the CAD system.

[0015] A sixth aspect of the collaboration system is the fifth aspect of the collaboration system, in which the drawing unit of the CAD system has a display screen. The display screen displays a collaboration button for starting collaboration with the BIM system. In this collaboration system, when a user of the CAD system selects the collaboration button, a transmission unit of the CAD system transmits drawing information and facility information to the BIM system.

[0016] In this collaboration system, a collaboration button is displayed on the display screen, and a user of the CAD system can activate the collaboration function by selecting the collaboration button, thereby sending useful first information from the BIM system to the CAD system. [Brief description of the drawings]

[0017] [Figure 1] This is a block diagram of a collaborative system consisting of a CAD system and a BIM system. [Diagram 2] FIG. 1 is a diagram showing a multi-type air conditioning device to be installed in a building, which is an example of an object for which a user draws construction drawings using a CAD system. [Diagram 3] 1 is a flow diagram of a user's creation of construction drawings by the CAD system 120. FIG. [Figure 4] This is a screen shot of a CAD system showing the drawing of a refrigerant piping route. [Diagram 5] This is a screen shot of a CAD system showing the drawing of pipe end symbols. [Figure 6] 1 is a screen shot of a CAD system showing pipe end symbols and properties of the pipe end symbols. [Figure 7] This is an enlarged view of the display (dialog) of pipe end symbol properties including outdoor unit information. [Figure 8] This is a screen from a CAD system that includes an input screen for adding outdoor unit information to the pipe end symbol. [Figure 9] FIG. 13 is an enlarged view of the input screen for adding outdoor unit information to the pipe end symbol. [Figure 10] FIG. 13 is a diagram showing selective input of an outdoor unit model number in additional settings of outdoor unit information. [Figure 11] This is a CAD system screen showing the button for selecting a refrigerant distribution kit, which is one of the BIM system integration functions. [Figure 12] This is the login screen for the BIM system in a CAD system. [Figure 13] This is a screen shot of a CAD system showing the user confirmation to start a given calculation in the BIM system. [Figure 14] This is a screen from a CAD system that shows the user that a certain calculation cannot be performed in the BIM system. [Figure 15] This is a CAD system screen that asks the user to confirm that the calculation results in the BIM system will be reflected in the drawing being created in the CAD system. [Figure 16] 1 is a CAD system screen showing a button for refrigerant branch kit compilation, which is one of the functions of the CAD system. [Figure 17] 13 is a refrigerant branch kit selection screen in the CAD system when a refrigerant branch kit compilation command is executed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] As an example of a linkage system including a CAD system and a BIM system, a linkage system 100 will be described below with reference to the drawings.

[0019] (1) Overview of the Collaborative System As shown in Fig. 1, the linked system 100 is composed of a CAD system 120 and a BIM system 140. The CAD system 120 is composed of a first computer 120a having a CPU 121 that executes a CAD application. The BIM system 140 is composed of a second computer 140a having a CPU 141 that executes a BIM application. The CAD system 120 and the BIM system 140 transmit and receive data via a line 190 such as the Internet.

[0020] (2) Equipment that is the subject of construction drawings drawn using a CAD system FIG. 2 shows a multi-type air conditioner 1 as an example of equipment for which a construction drawing is created by the CAD system 120. The air conditioner 1 is equipped with an outdoor unit 10, multiple indoor units 30 (31, 32, 33, . . . ), and a connecting pipe 50, and is installed in a six-story building BL here. The outdoor unit 10 is installed on the roof, and the multiple indoor units 30 are installed on the ceilings of the first to sixth floors (G1 to G6). The refrigerant flowing through the air conditioner 1 passes through the connecting pipe 50 and travels between the outdoor unit 10 and the indoor units 30. In other words, the outdoor unit 10, the indoor units 30, and the connecting pipe 50 constitute a refrigerant circuit in which the refrigerant circulates. In the refrigerant circuit, a vapor compression refrigeration cycle is repeated. In the air conditioner 1 in which a vapor compression refrigeration cycle is performed, the outdoor unit 10 functions as a heat source unit, and each indoor unit 30 functions as a utilization unit.

[0021] The connecting pipe 50 that connects the outdoor unit 10 and the indoor unit 30 includes a refrigerant pipe 51 through which a liquid refrigerant or a gas refrigerant passes, and a joint 52 that branches the refrigerant flow path. The joint 52 is sometimes referred to as a "refrigerant branching kit" in the drawings, but in this embodiment, the two are synonymous.

[0022] (3) Details of the Collaborative System (3-1)CAD system The CAD system 120 is installed in a construction company or a design office that installs the air conditioning device 1 in a building BL. Specifically, the CAD system 120 is configured by installing a CAD application 130 in a first computer 120a, which is a computer used in a design office or the like.

[0023] The CAD system 120 includes a control arithmetic unit and a storage device. The control arithmetic unit may be a processor such as a CPU or a GPU, but here, a CPU 121 is used. The control arithmetic unit reads out a CAD application 130 stored in the storage device, and performs predetermined image processing and calculation processing according to the CAD application 130. Furthermore, the control arithmetic unit can write calculation results to the storage device and read information stored in the storage device according to the CAD application 130. The drawing unit 131, drawing information storage unit 132, equipment information storage unit 133, received information reflection unit 134, setting unit 135, and joint tally unit 136 included in the CAD application 130 in FIG. 1 indicate functional blocks realized by the CPU 121.

[0024] Furthermore, the first computer 120a constituting the CAD system 120 has a transmitting unit 122, a receiving unit 123, and an input unit 124. The transmitting unit 122 can send various types of information to the BIM system 140. The receiving unit 123 can receive various types of information from the BIM system 140. The input unit 124 is an input device such as a keyboard or a mouse, and accepts operations by a user and manual input of various types of information.

[0025] The drawing unit 131 is a functional unit having functions such as creating and correcting various lines and managing image layers, and draws construction drawings for the air conditioning device 1 based on user operations. Details of drawing will be described later.

[0026] The drawing information storage unit 132 stores drawing information, which is information on the construction drawings created by the drawing unit 131. Specifically, the drawing information includes information on line diagrams. For example, information on the route of the connecting pipe 50 is stored in the drawing information storage unit 132 as drawing information.

[0027] The facility information storage unit 133 stores attribute information of parts included in the construction drawings as facility information. Here, attributes of the outdoor unit 10 and the indoor unit 30 of the air conditioning device 1 are stored in the facility information storage unit 133 as facility information.

[0028] The received information reflecting unit 134 reflects the information received by the receiving unit 123 from the BIM system 140 in the working drawings. The reflection will be described later.

[0029] The setting unit 135 sets information such as the model number of the outdoor unit 10, the length of the connecting pipe 50, the number of bends of the refrigerant piping 51 of the connecting pipe 50, etc., in the pipe end symbol SY51 described below. The length of the connecting pipe 50 is the length of the connecting pipe 50 from the end of the refrigerant piping 51 with the pipe end symbol SY51 to the outdoor unit 10. The number of bends is the number of bends of the connecting pipe 50 from the end of the refrigerant piping 51 with the pipe end symbol SY51 to the outdoor unit 10. Setting the outdoor unit information in this pipe end symbol SY51 will be described in detail later.

[0030] As described below, the joint counting unit 136 counts the number of joints 52 for each selected refrigerant system and outputs the count in a table format.

[0031] The transmission unit 122 sends the above drawing information and facility information to the BIM system 140.

[0032] The receiving unit 123 receives, from the BIM system 140, first information which is a result of calculation by the BIM system 140 based on the drawing information and the facility information. As will be described later, the first information includes the size of the refrigerant pipes 51, the model number of the joints 52, the additional refrigerant charge amount which is the additional amount of refrigerant required by the air conditioning device 1, and the like.

[0033] Of the components of the air conditioner 1 before installation, only the outdoor unit 10 is filled with refrigerant at the time of delivery to the building BL, and the indoor unit 30 and the connecting pipe 50 do not contain refrigerant. The outdoor unit 10, the indoor unit 30, and the connecting pipe 50 are connected to form one closed refrigerant circuit (refrigerant system), and after a leak test is performed by vacuuming or the like, the refrigerant filled in the outdoor unit 10 is made to flow through the entire refrigerant circuit. At this time, depending on the number of indoor units 30 included in the refrigerant system and the length of the connecting pipe 50, the refrigerant pre-filled in the indoor unit 10 may not be enough. In such a case, it is necessary to additionally fill the refrigerant packed in a cylinder from outside the refrigerant circuit into the refrigerant circuit. The amount of refrigerant that needs to be additionally filled at this time is the additional refrigerant filling amount.

[0034] (3-2) BIM System The BIM system 140 is one of the cloud computing services operated by the manufacturer of the air conditioning device 1 or the like. Specifically, the BIM system 140 is configured by installing a BIM application 150 on a second computer 140a, which is a computer placed in the cloud. The BIM system 140 in this embodiment is a system that digitizes and automates the work performed in designing the air conditioning device 1. The BIM system 140 can select the diameter of the refrigerant pipes 51, calculate the amount of additional refrigerant to be charged, select the model number of the joints 52, and the like, based on information such as the indoor unit 30, the outdoor unit 10, and the length of the refrigerant pipes 51 of the connecting pipes 50, and the number of joints 52.

[0035] The BIM system 140 includes a control arithmetic device and a storage device. A processor such as a CPU or GPU can be used for the control arithmetic device, but here, a CPU 141 is used. The control arithmetic device reads out a BIM application 150 stored in the storage device, and performs predetermined image processing and calculation processing according to the BIM application 150. Furthermore, the control arithmetic device can write calculation results to the storage device and read information stored in the storage device according to the BIM application 150. A refrigerant selection calculation unit 151 included in the BIM application 150 in FIG. 1 shows a functional block realized by the CPU 141.

[0036] The BIM system 140 performs calculations to supplement the missing parts in the construction drawings based on the drawing information and equipment information sent from the transmission unit 122 of the CAD system 120, and determines the first information. Specifically, the refrigerant selection calculation unit 151 calculates the diameter of the refrigerant pipe 51, the amount of additional refrigerant to be charged, and selects the model number of the joint 52, and determines them as the first information.

[0037] Further, the second computer 140a constituting the BIM system 140 has a transmitting unit 142 and a receiving unit 143. The transmitting unit 142 transmits the first information to the CAD system 120. The receiving unit 143 receives the above information from the CAD system 120.

[0038] (4) Users create construction drawings using a CAD system FIG. 3 shows a flow of creating a user's construction drawing by the CAD system 120 using the linking function with the BIM system 140.

[0039] First, at a design office or the like, a user sits in front of a first computer 120a in which a CAD application 130 is installed, and executes the CAD application 130. Then, in step S11, the user creates a route for the connecting pipes 50 to be installed in the ceiling of each floor of the building BL, that is, a so-called refrigerant piping route, using a drawing function (drawing unit 131) of the CAD application 130. The drawing unit 131 of the CAD system 120 has a display screen as shown in FIG. 4 for the user.

[0040] As will be described later, the display screen of the CAD system 120 displays a ribbon menu of the "BIM link (B10)" link button shown in Fig. 11 and Fig. 16. This link button B10 is a button for starting linkage with the BIM system 140, and will be described in detail later.

[0041] In step S12, the user uses the functions of the CAD application 130 to select the indoor units 30. The user selects the model number of the indoor units 30, creates a drawing, and connects the ends of the refrigerant piping 51 to each indoor unit 30.

[0042] In step S13, the user creates the pipe end symbol SY51 of the refrigerant pipe 51 using the function of the CAD application 130. After the user has drawn the route of the connecting pipe 50 for each floor, or while drawing it, the user draws the pipe end symbol SY51 at the end of the refrigerant pipe 51 of the connecting pipe 50. When the outdoor unit information addition setting / change command is started from the ribbon menu, the creation of the pipe end symbol SY51 begins. When the drawn refrigerant pipe 51 is clicked using the input device mouse as shown in FIG. 5, the pipe end symbol SY51 is drawn at the end of the refrigerant pipe 51 that is closer to the clicked position. When the drawn pipe end symbol SY51 is selected on the display screen 200 as shown in FIG. 6, a dialog 210a (outdoor unit information input dialog) in which information including the outdoor unit information 210 and the like is lined up is displayed as a pop-up. An enlarged view of this dialog 210a is shown in FIG. 7. Each piece of information shown in the dialog 210a is information stored as a property of the pipe end symbol SY51. In other words, the pipe end symbol SY51 is a symbol having the outdoor unit information 210. The outdoor unit information 210 is information including the model number of the outdoor unit 10, the length of the connecting pipe 50 to the outdoor unit 10, the number of bends of the refrigerant pipe 51 to the outdoor unit 10, and the like. In step S14, in the dialogue 210a, the user inputs the model number of the outdoor unit 10, the height difference between the outdoor unit 10 and the indoor unit 30, the center-to-center length of the refrigerant pipe 51 to the outdoor unit 10, and the number of bends of the refrigerant pipe 51 (see Figs. 8 and 9). When a button for selecting the outdoor unit model number is pressed on the display screen shown in Fig. 9, the display screen shown in Fig. 10 is launched, and the user selects the model number of the desired outdoor unit. Information such as the model number of each outdoor unit is stored in the CAD system 120.

[0043] It should be noted that the "refrigerant additional charge amount" in the dialogue 210a shown in FIG. 7 is a numerical value (weight) that is automatically input by reflecting the result of the refrigerant selection described below.

[0044] When drawing the routes of the connecting pipes 50 for each floor, the indoor units 30, and the pipe end symbols SY51 including the outdoor unit information 210 is completed, the user logs in to the BIM system 140 using the functions of the CAD application 130 in step S15. As shown in FIG. 11, the user selects and launches the refrigerant selection command (B12) from the ribbon menu of "BIM linkage (B10)". This displays the BIM login screen shown in FIG. 12. The user logs in to the BIM system 140 by inputting login information and making an HTTP request to the second computer 140a of the BIM system 140.

[0045] After logging in, the user selects a refrigerant system on the display screen of the CAD system 120 as shown in FIG. 4. The refrigerant system refers to one refrigerant circuit composed of the outdoor unit 10, the indoor unit 30, and the connection pipe 50, and is one refrigeration cycle in which the refrigerant circulates. The refrigerant system is selected by specifying one of the refrigerant pipes 51, the indoor unit 30, the outdoor unit 10, and the joint 52. It is also possible to select multiple refrigerant systems. If the refrigerant pipes 51 of the selected refrigerant system have one or more unconnected connection points, a message shown in FIG. 13 is displayed on the display screen of the CAD system 120. If the selected refrigerant system has an unconnected refrigerant pipe 51, calculation for refrigerant selection cannot be performed, so advice is displayed to attach the indoor unit 30, the outdoor unit 10, or the pipe end symbol SY51 to the unconnected end of the refrigerant pipe 51.

[0046] When the refrigerant pipes of all the selected refrigerant systems are in a connected state, the message in Fig. 14 is displayed on the display screen of the CAD system 120, and the transmission unit 122 of the CAD system 120 transmits the drawing information and the equipment information to the BIM system 140. The drawing information is information on the refrigerant pipes 51 of the connecting pipe 50 and the route of the joints 52, and is stored in the drawing information storage unit 132 of the CAD system 120. The equipment information is information on the indoor units 30 and the outdoor units 10, and is stored in the equipment information storage unit 133 of the CAD system 120. The receiving unit 143 of the BIM system 140 receives the drawing information and the equipment information, and the BIM system 140 is prepared to perform calculations for refrigerant selection for each refrigerant system.

[0047] 14, in step S16, the refrigerant selection calculation unit 151 of the BIM system 140 performs a calculation for refrigerant selection. In this embodiment, the refrigerant selection is calculated based on information such as the indoor unit 30, the outdoor unit 10, the length of the refrigerant piping 51 of the connecting pipe 50, and the number of joints 52 of the connecting pipe 50. In this embodiment, the calculation for refrigerant selection means the calculation of the diameter of the refrigerant piping 51 and the amount of additional refrigerant to be charged, and the selection of the model number of the joints 52.

[0048] The information calculated by the refrigerant selection calculation unit 151 of the BIM system 140, namely the diameter of the refrigerant piping 51, the calculation of the additional refrigerant charge amount, and the model number of the joint 52, is sent as the first information from the transmission unit 142 of the BIM system 140 to the CAD system 120, and the display shown in Figure 15 is displayed on the display screen of the CAD system 120.

[0049] When the user selects "Yes" on the display screen shown in Fig. 15, the first information calculated by the refrigerant selection calculation unit 151 of the BIM system 140 is reflected in the construction drawing being created by the CAD system 120 (step S17). Accordingly, the selection of the refrigerant system is cancelled. The reflection in the construction drawing is performed by the received information reflection unit 134 of the CAD system 120.

[0050] On the other hand, if the user selects "No" on the display screen shown in FIG. 15, the selection of the refrigerant system is cancelled and the calculation results of the BIM system 140 are discarded.

[0051] After drawing each refrigerant system, the user uses the function of the CAD application 130 in step S18 to count the number of joints 52 for each refrigerant system. The user activates the "refrigerant branch kit count command" (B20) shown in FIG. 16 from the ribbon menu. The user then selects and confirms the refrigerant branch kit (joint 52). The selection method is individual selection or range selection. FIG. 17 is a display screen of the CAD system 120 showing a state in which two refrigerant branch kits (joints 52) have been selected by range selection. After the user finishes the selection, the joint counting unit 136 of the CAD system 120 counts the number of joints 52 for each selected refrigerant system and outputs the counting results in a table format. The items written in the table are the model number of each joint 52, the name of the refrigerant system, the total number of joints 52, the number of joints 52 for each model number, the name of the construction, the customer name, the management number, and the creation date. The project name, client name, and control number are items that are manually entered by the user, and the remaining items are automatically entered by the CAD system 120.

[0052] (5) Features (5-1) Conventionally, when drawing construction drawings for air conditioning equipment, users manually calculate the bore size of the refrigerant pipes, the model number of the joints, and the amount of additional refrigerant charge based on information such as the model number of the outdoor unit, the model number of the indoor unit, the length of the refrigerant pipes, the number of bends, and the number of joints. Conventionally, users manually input the results of calculations such as the bore size of the refrigerant pipes, the model number of the joints, and the amount of additional refrigerant charge obtained by manual calculations into the construction drawings. Such manual calculations and manual inputs by users take a lot of time in drawing. Conventionally, it was not possible to leave the manually calculated amount of additional refrigerant charge and the model number of the joints on the construction drawings, which could lead to mistakes when making estimates later.

[0053] In order to solve such problems, the CAD system 120 according to this embodiment has been developed and put into practice.

[0054] According to the CAD system 120, the first information is sent from the BIM system 140, so that the burden on the user in creating the construction drawings can be reduced. Specifically, in the linkage system 100, the calculation for refrigerant selection is performed by the BIM system 140, so that the burden on the user is reduced.

[0055] (5-2) In the CAD system 120, the receiving unit 123 can receive the first information determined by the BIM system 140 based on information on the air conditioning device 1 parts (indoor unit 30, outdoor unit 10, refrigerant piping 51, joints 52) and part attribute information, and the first information is reflected in the construction drawings. Conventionally, information such as the first information has been calculated and input manually by the user, but this linkage system 100 reduces the burden on the user.

[0056] (5-3) The CAD system 120 can receive first information useful for creating drawings (working drawings) of the air conditioning device 1 from the BIM system 140, and the first information is reflected in the working drawings, reducing the burden on the user. Specifically, even if only the indoor units 30 and the route of the refrigerant piping 51 are drawn on the floor plan of each floor by the drawing unit 131, the above refrigerant selection can be performed. This makes it possible to obtain information on the aperture size of the refrigerant piping 51, the model number of the appropriate joint 52, and the additional refrigerant charge amount from the BIM system 140 and reflect them in the appropriate parts of the drawings. In addition, the calculation results for refrigerant selection are left on the drawings.

[0057] (5-4) In the CAD system 120, various information can be set in the pipe end symbol SY51, so that the information can be included in the drawing information and facility information sent to the external BIM system 140. This increases the usefulness of the first information sent from the BIM system 140, and reduces the workload of the user of the CAD system 120 compared to before.

[0058] (5-5) According to the linkage system 100 of this embodiment, calculations are performed on the BIM system 140 side that supplement the missing parts (pipe end symbol SY51 to refrigerant piping 51 of the outdoor unit 10) that are lacking in the facility (air conditioning device 1) and information related to the parts (detailed information such as the diameter of the refrigerant piping 51), so it is possible to reduce the amount of information held by the CAD system 120. This eliminates problems even if the storage capacity and computing power of the first computer 120a in which the CAD system 120 is installed is small.

[0059] (5-6) In the collaboration system 100 according to this embodiment, as shown in Figures 11 and 16, a ribbon menu of the collaboration button "BIM Collaboration" is displayed on the display screen of the CAD system 120, so that a user of the CAD system 120 can activate the collaboration function by, for example, selecting a refrigerant selection command (B12), and send useful first information from the BIM system 140 to the CAD system 120.

[0060] In addition, the ribbon menu of the “BIM Linkage” link button on the display screen of the CAD system 120 includes a refrigerant selection command (B12) as well as a BIM account creation request command (B11); however, as these are well-known commands related to account creation, detailed explanations will be omitted.

[0061] (5-7) In the linkage system 100 according to this embodiment, the CAD system 120 has a function for tallying up the number of joints 52 by model number and refrigerant system and outputting the results in a table format, reducing the burden on the user. In this way, a summary table can be obtained in the CAD system 120 based on the results of refrigerant selection by the BIM system 140, and the tally results can be left on the drawing, reducing the burden on the user.

[0062] In other words, in the linked system 100, the appropriate part selection information, which is the calculation result of the BIM system 140, is not used to replace the part information created in the CAD system 120, but is used to complementarily register the calculation result of the BIM system 140 as part information in the CAD system 120. Then, by summing up the attribute values ​​of the parts included in the part information, it is possible to calculate the summary table of the joints 52 here.

[0063] (6) Variations (6-1) In the above explanation of the CAD system 120, a multi-type air conditioning unit 1 is given as an example of equipment for which construction drawings are created, but the target equipment is not limited to air conditioning equipment and can include various types of equipment such as instrumentation design, plant design, etc.

[0064] (6-2) Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure described in the claims. [Explanation of symbols]

[0065] 1. Air conditioning equipment (refrigeration cycle equipment; facilities) 10 Outdoor unit (heat source unit) 30 Indoor unit (utilization unit) 50 Connecting pipe 51 Refrigerant piping 52 Joint 100 Collaboration Systems 120 CAD System 122 Transmitter 123 Receiving unit 130 CAD Applications 131 Drawing Department 134 Received Information Reflection Unit 140 BIM System SY51 Tube end code [Prior art documents] [Patent documents]

[0066] [Patent Document 1] Japanese Patent Application Publication No. 4-90063

Claims

1. A drawing unit (131) for drawing construction drawings of the facility; A transmission unit (122) that transmits drawing information and facility information to an external BIM system (Building Information Modeling System); A receiving unit (123) that receives first information regarding the facility determined by the BIM system (140) based on the drawing information and the facility information; A CAD system (computer aided design system).

2. The drawing information includes information on the parts of the equipment in the construction drawing, the first information includes attribute information of the part, Further comprising a reflection unit (134) for reflecting the first information in the working drawing, The CAD system (120) of claim 1.

3. The facility is a refrigeration cycle device (1) in which a heat source unit (10) and a utilization unit (30) are connected by a connection pipe (50) including a refrigerant pipe (51) and a joint (52), The drawing information includes information on the route of the connecting pipe in the construction drawing, The first information includes at least one of a size of the refrigerant pipe, a model number of the joint, and an additional refrigerant charge amount that is an additional amount of refrigerant required by the refrigeration cycle device, Further comprising a reflection unit (134) for reflecting the first information in the working drawing, The CAD system (120) of claim 1.

4. The construction drawing includes a pipe end symbol (SY51) attached to the end of the refrigerant piping, a setting unit that sets, to the pipe end symbol, at least one piece of information including a model number of the heat source unit, a length of the connecting pipe from the end of the refrigerant pipe bearing the pipe end symbol to the heat source unit, and a number of bends of the connecting pipe from the end of the refrigerant pipe bearing the pipe end symbol to the heat source unit; The CAD system of claim 3 further comprising:

5. The CAD system according to any one of claims 1 to 4; The BIM system; A linkage system comprising: The BIM system performs a calculation to supplement the missing parts in the equipment in the construction drawing based on the drawing information and the equipment information, and determines the first information. Collaboration system (100).

6. The drawing unit of the CAD system has a display screen that displays a link button for starting linkage with the BIM system, When a user of the CAD system selects the link button, the transmission unit of the CAD system transmits the drawing information and the facility information to the BIM system. The linkage system according to claim 5 .

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