Precise and efficient automatic temperature control device and method for guide rail of numerical control cylindrical grinder

Abstract

The present application relates to a precision high-efficiency numerical control cylindrical grinder guide rail automatic temperature control device and method, including bed, workbench and multiple guide rail intelligent temperature control module group, the bed and V-shaped guide rail body adopt split structure, V-shaped guide rail body is equipped with several sections of assembly, the guide positioning groove is precisely matched with the positioning block in V-shaped guide rail body, the independent PLC intelligent temperature control structure feature is arranged in V-shaped guide rail body, the working surface is precisely monitored in real time, and the V-shaped guide rail temperature rise is matched, the key technical problems that the V-shaped guide rail body sliding friction generates heat and expands to cause deformation, elongation and distortion along the length direction are solved, the process requirement is met, the V-shaped guide rail temperature rise value is automatically collected and intelligently controlled in real time and accurately during the high-speed grinding operation process.The technical problems that the precision high-efficiency numerical control cylindrical grinder continuously grinds high-efficiency machining shaft parts straightness, outer circle radial runout precision and grinding tool path are solved, and the high-precision grinding high-efficiency machining high-quality harsh requirements of precision shaft parts are met.

Description

Technical Field

[0001] This invention relates to the field of precision and high-efficiency CNC cylindrical grinding machine manufacturing technology, and in particular to an automatic temperature control device and method for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine. Background Technology

[0002] With the rapid development of advanced manufacturing and automation industries towards intelligent, precise, efficient, and digitally managed high-quality processes, precision long shaft parts are facing stringent requirements for high-precision grinding and efficient machining. In particular, when existing CNC cylindrical grinding machines continuously grind precision shaft parts for extended periods, the reciprocating motion of the machine's table causes the straightness and radial runout of the ground precision shaft parts to exceed tolerances. Rapid feed motion along the axial direction easily generates grinding marks, failing to meet the urgent need for high-precision and efficient grinding of precision long shaft parts and severely impacting the improvement of product quality in precision-ground, efficient machining of long shaft parts.

[0003] To address the key technical challenges of machining accuracy and grinding path in long-shaft parts during continuous high-efficiency grinding using precision and high-efficiency CNC cylindrical grinding machines, our company has collaborated with Professor Li Congbo's team at Chongqing University, a leading national key university with strong academic expertise. Preliminary research and analysis based on the theory of thermal deformation due to metal temperature rise has revealed that thermal deformation and distortion affect the long-term precision grinding accuracy of the grinding machine. Further in-depth research and analysis, such as... Figure 7 and 8 As shown, the upper inner side of the precision high-efficiency CNC cylindrical grinding machine bed is equipped with a V-shaped guide rail, and the outer side is equipped with a separate linear guide rail. Because the V-shaped guide rail and the bed are an integral structure, the V-shaped guide rail, together with the headstock and tailstock lower table guide rails, form a guide rail pair. Over a long period of continuous high-speed reciprocating motion, sliding friction generates heat. The separate linear guide rail, however, is fastened to the upper part of the bed by pressure plates and bolts, so it essentially does not have the problem of heat deformation affecting linear motion accuracy. Furthermore, because the V-shaped guide rail on the upper inner side of the bed is a relatively long integral structure, the amount of thermal deformation generated by the continuous high-speed reciprocating motion of the V-shaped guide rail and conducted to the bed is significantly different from the thermal expansion of the V-shaped guide rail itself (elongation along the length of the front bed). The resulting thermal expansion of the V-shaped guide rail causes severe deformation and distortion, significantly affecting the reciprocating linear motion accuracy of the table. This leads to the main problems of straightness, radial runout deviation, and grinding marks during the precision grinding of shaft parts.

[0004] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides an automatic temperature control device and method for the guide rail of a precision and efficient CNC cylindrical grinding machine. This eliminates the technical challenge of deformation and torsion of the V-shaped guide rail of the CNC cylindrical grinding machine caused by sliding friction heating, thereby meeting the stringent requirements of precision long shaft parts for high-precision grinding and efficient processing.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a precision and efficient CNC cylindrical grinding machine guideway automatic temperature control device, including a bed and a worktable. A headstock and a tailstock are respectively provided on the upper part of the worktable. A linear guideway is provided on the outer side of the upper part of the bed, and multiple intelligent temperature control modules for the guideway are provided along its length on the inner side of the upper part of the bed. The worktable is located above the intelligent temperature control modules and the linear guideway. The intelligent temperature control module for the guideway includes a V-shaped guideway body disposed on the bed. A positioning block is provided at the lower end of the V-shaped guideway body along its length. Two rows of cooling holes are arranged in a V-shape on the V-shaped guideway body, each row including multiple cooling holes spaced apart. The two ends of the V-shaped guideway body are respectively... The system is equipped with sealed end caps, the inner side of which has a guide groove communicating with all cooling holes. One of the sealed end caps has an air inlet communicating with the guide groove, and the other sealed end cap has an exhaust hole communicating with the guide groove. A temperature sensor is located in the middle of the V-shaped guide rail. A guide positioning groove is provided on the inner side of the upper part of the bed along its length. The V-shaped guide rail is positioned on the bed by the cooperation of the positioning block and the guide positioning groove and is fastened to the bed by threaded connection A. Each air inlet is connected to a solenoid valve and an air conditioner in sequence through an air inlet pipe. The temperature sensor, solenoid valve, and air conditioner are connected to a PLC controller to form an intelligent control system.

[0008] As a further technical solution, the guide positioning groove is provided with a plurality of threaded holes A at intervals along its length direction, and the corresponding V-shaped guide rail body is provided with a plurality of stepped holes A at intervals along its length direction at the middle position of the V-shaped guide rail body. The stepped holes A are provided with internal hexagon bolts A, and the V-shaped guide rail body is fastened to the bed by installing internal hexagon bolts A on the threaded holes A.

[0009] As a further technical solution, the V-shaped guide rail body is provided with an inclined mounting hole in the middle, the temperature sensor is set on the mounting hole, and the front end of the temperature sensor is close to the V-shaped working surface of the V-shaped guide rail body.

[0010] As a further technical solution, the sealing end cap is installed on the V-shaped guide rail body via a threaded connection B, and a sealing gasket is provided between the sealing end cap and the V-shaped guide rail body, with a through hole on the sealing gasket corresponding to the position of the guide groove; or, the sealing cap is connected to the V-shaped guide rail body via sealant.

[0011] As a further technical solution, the sealing end cap is provided with a plurality of stepped holes B at intervals, and the corresponding two ends of the V-shaped guide rail are provided with a plurality of threaded holes B. The stepped holes B are provided with internal hexagon bolts B, and the sealing end cap is fastened to the V-shaped guide rail by installing the internal hexagon bolts B on the threaded holes B.

[0012] The second aspect of this application provides an automatic temperature control method for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine, including the automatic temperature control device described in the first aspect of this application;

[0013] First, the temperature sensor in each of the intelligent temperature control modules of the guide rail autonomously collects the temperature of the V-shaped guide rail body in the module in real time and transmits the temperature data to the PLC controller in real time.

[0014] Secondly, when the temperature value in one or more of the guide rail intelligent temperature control modules exceeds the temperature value set by the intelligent control system, the air conditioner is turned on and the solenoid valve corresponding to the guide rail intelligent temperature control module whose temperature exceeds the temperature set by the intelligent control system is opened. The cold air enters the guide groove through the air inlet pipe and air inlet hole, and then enters all the cooling holes in the V-shaped guide rail body for cooling, and finally is discharged through the exhaust hole.

[0015] Furthermore, when the temperature of the cooling rail intelligent temperature control module drops to the set temperature value of the intelligent control system, the corresponding solenoid valve closes. When the temperature of all rail intelligent temperature control modules drops to the set temperature value of the intelligent control system, the PLC controller intelligently controls the air conditioner to stop working.

[0016] Compared with the prior art, one or more technical solutions of this application have the following beneficial effects:

[0017] This application innovatively redesigns the existing V-shaped guide rail structure on one side of the bed of a precision high-efficiency CNC cylindrical grinding machine. The bed and the V-shaped guide rail are designed as separate structures, and the V-shaped guide rail is designed as a multi-segment assembly structure. The positioning block of each segment of the V-shaped guide rail precisely matches the guide positioning groove of the bed, improving the straightness accuracy of several segments of the V-shaped guide rail after assembly, avoiding the straightness problem of the V-shaped guide rail assembly, and reducing the phenomenon of sliding friction and heat generation on the guide rail surface due to straightness of the V-shaped guide rail. This solves the key technical problem of thermal deformation and distortion of the V-shaped guide rail itself caused by sliding friction and heat generation expansion (the V-shaped guide rail extends along the length of the bed) on one side of the bed of the precision high-efficiency CNC cylindrical grinding machine, thus meeting the requirements of machining and assembly process. Each V-shaped guide rail is equipped with an independent intelligent temperature control structure under PLC control. This enables real-time, accurate, and automatic acquisition and intelligent control of the V-shaped guide rail temperature rise during high-speed precision grinding. This further solves the key technical problem of excessive straightness and radial runout accuracy in machined shaft parts caused by prolonged continuous precision grinding in high-efficiency CNC cylindrical grinding machines. It also solves the technical problem of grinding marks generated during rapid axial feed precision grinding in high-efficiency CNC cylindrical grinding machines. The automatic temperature control device of this application meets the stringent requirements of high-precision, high-efficiency, and high-quality machining of precision shaft parts, achieving a leap in the product quality of shaft parts ground by precision high-efficiency CNC cylindrical grinding machines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the automatic temperature control device for the guide rail of the CNC cylindrical grinding machine according to the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of part A in the image;

[0020] Figure 3 This is an exploded view of the intelligent temperature control module for guide rails of the present invention;

[0021] Figure 4 This is a schematic diagram of the exhaust port structure of the present invention;

[0022] Figure 5 This is a top view of the intelligent temperature control module for the guide rail of the present invention;

[0023] Figure 6 for Figure 5 Sectional view along line AA in the middle;

[0024] Figure 7 This is a schematic diagram of an existing CNC cylindrical grinding machine;

[0025] Figure 8 for Figure 7 Enlarged view of part B in the image;

[0026] In the diagram, 1. Bed, 2. Worktable, 3. Headstock, 4. Tailstock, 5. Linear guide rail, 6. Intelligent temperature control module for the guide rail, 601. V-shaped guide rail body, 602. Positioning block, 603. Cooling hole, 604. Sealing end cap, 605. Guide groove, 606. Air inlet, 607. Exhaust hole, 608. Temperature sensor, 609. Mounting hole, 610. V-shaped working surface, 7. Guide positioning groove, 8. Threaded connection A, 801. Thread 9. Hole A, 802, Stepped Hole A, 803, Socket Head Mill Bolt, 10. Air Inlet Pipe, 11. Solenoid Valve, 12. Air Conditioner, 13. PLC Controller, 14. Threaded Connection B, 1301, Stepped Hole B, 1302, Threaded Hole B, 15. Socket Head Mill Bolt, 16. Sealing Gasket, 17. Through Hole, 18. Grinding Wheel Holder, 19. Pad Plate, 20. Machine Tool Guide Rail Belt, 21. Pressure Plate, 22. Bolt, 23. Existing V-Shaped Guide Rail. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The embodiments described in this application are only some embodiments of this application, and not all embodiments. The following detailed descriptions are exemplary and intended to further illustrate this application, and should not be construed as any limitation on this application or its application or use. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Unless otherwise specified or stated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In the description of this application, it should be understood that directional terms such as "front," "back," "left," "right," "up," "lateral," "longitudinal," "vertical," and "top," "bottom," etc., indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplification. Unless otherwise stated, these directional terms do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0030] like Figure 1-6As shown, the precision and high-efficiency CNC cylindrical grinding machine's automatic temperature control device for the guideways includes a bed 1 and a worktable 2. The CNC cylindrical grinding machine also includes a grinding wheel head 16, a pad 17, and a machine tool guideway belt 18, among other components. The upper part of the worktable 2 is equipped with a headstock 3 and a tailstock 4. A linear guideway 5 is provided on the outer side of the upper part of the bed 1. The linear guideway 5 is designed separately from the bed 1 and is installed using a pressure plate 19 and bolts 20. Multiple intelligent temperature control modules 6 are provided along the length of the inner side of the upper part of the bed 1. A workbench 2 is provided above the intelligent temperature control module 6 and the linear guide rail 5. The intelligent temperature control module 6 includes a V-shaped guide rail body 601 mounted on the bed. A positioning block 602 is provided at the lower end of the V-shaped guide rail body 601. The V-shaped guide rail body 601 has two rows of cooling holes 603 arranged in a V-shape. Each row of cooling holes 603 includes multiple cooling holes 603 arranged at intervals. The cooling holes 603 are arranged along the length direction of the V-shaped guide rail body 601. Sealing end caps 60 are provided at both ends of the V-shaped guide rail body 601. 4. The inner side of the sealing end cover 604 is provided with a guide groove 605 that communicates with all the cooling holes 603. One of the sealing end covers 604 is provided with an air inlet 606 that communicates with the guide groove 605, and the other sealing end cover 604 is provided with an exhaust hole 607 that communicates with the guide groove 605. In practical applications, the air inlet 606 and the exhaust hole 607 are preferably designed on the side wall of the sealing end cover 604, and more preferably, the air inlet 606 and the exhaust hole 607 are located on different sides to improve the cooling circulation effect. A temperature sensor 608 is provided in the middle of the V-shaped guide rail 601; a guide positioning groove 7 is provided on the inner side of the upper part of the bed 1 along its length direction; the V-shaped guide rail 601 is positioned on the bed 1 by the cooperation of the positioning block 602 and the guide positioning groove 7 and is fastened to the bed 1 by the threaded connection A8; each of the air inlets 606 is connected to the solenoid valve 10 and the air conditioner 11 in sequence through the air inlet pipe 9; the temperature sensor 608, the solenoid valve 10 and the air conditioner 11 are respectively connected to the PLC controller 12. Addressing the critical technical challenge of thermal deformation and distortion of the existing V-shaped guide rail 21 structure on CNC cylindrical grinding machines due to temperature rise, this invention sets the bed 1 and the V-shaped guide rail body 601 as separate structures, and designs the V-shaped guide rail body 601 as a multi-segment assembly structure. The positioning block 602 of each segment of the V-shaped guide rail body 601 is precisely matched with the guide positioning groove 7 of the bed 1, improving the straightness accuracy of several segments of the V-shaped guide rail body 601 after assembly, avoiding the problem of straightness of the V-shaped guide rail body 601 assembly, and reducing the phenomenon of heat generation due to sliding friction on the guide rail surface due to straightness of the V-shaped guide rail body 601. This solves the key technical problem of thermal deformation and distortion of the V-shaped guide rail body 601 itself caused by the expansion of the V-shaped guide rail body 601 on one side of the bed 1 of the precision and high-efficiency CNC cylindrical grinding machine due to sliding friction heat generation (the V-shaped guide rail body 601 extends along the length direction of the bed 1), thus meeting the requirements of machining and assembly process.Each V-shaped guide rail 601 is equipped with an independent intelligent temperature control structure under PLC control. This enables real-time, accurate, and autonomous acquisition and intelligent control of the temperature rise of the V-shaped guide rail 601 during high-speed precision grinding. This further solves the key technical problem of excessive straightness and radial runout accuracy in machined shaft parts caused by prolonged continuous precision grinding in high-efficiency CNC cylindrical grinding machines. It also solves the technical problem of grinding marks generated during rapid axial feed precision grinding in high-efficiency CNC cylindrical grinding machines. The automatic temperature control device of this application meets the stringent requirements of high-precision, high-efficiency, and high-quality machining of precision shaft parts, achieving a leap in the product quality of shaft parts ground by precision high-efficiency CNC cylindrical grinding machines.

[0031] Furthermore, such as Figure 6 As shown, the guide positioning groove 7 has multiple threaded holes A801 ​​spaced along its length, and the corresponding V-shaped guide rail body 601 has multiple stepped holes A802 spaced along its length at its middle position. Hexagon socket head cap screws A803 are installed in the stepped holes A802. The V-shaped guide rail body 601 is fastened to the bed 1 by installing the hexagon socket head cap screws A803 into the threaded holes A801. By fully utilizing the structural features of the V-shaped guide rail body 601 and the structure of the guide positioning groove 7, precise positioning and reliable locking are achieved, effectively improving the assembly accuracy and production efficiency of the V-shaped guide rail body 601. Furthermore, installation does not affect the normal use of the V-shaped working surface 610.

[0032] Furthermore, such as Figure 3 As shown, the V-shaped guide rail 601 has an inclined mounting hole 609 in the middle, and the temperature sensor 608 is disposed on the mounting hole 609, with the front end of the temperature sensor 608 close to the V-shaped working surface 610 of the V-shaped guide rail 601. The inclined design of the mounting hole 609 allows the front end of the temperature sensor 608 to be closer to the V-shaped working surface 610, enabling more accurate reflection of the true temperature of the V-shaped working surface 610 and timely, precise, and intelligent temperature control of the V-shaped working surface 610 of the V-shaped guide rail 601.

[0033] Furthermore, such as Figure 3 As shown, the sealing end cap 604 is installed on the V-shaped guide rail body 601 via a threaded connection B13, and a sealing gasket 14 is provided between the sealing end cap 604 and the V-shaped guide rail body 601. The sealing gasket 14 has a through hole 15 corresponding to the position of the guide groove 605; alternatively, the sealing end cap 604 is connected to the V-shaped guide rail body 601 via sealant. Two methods for achieving a sealed installation between the sealing end cap 604 and the V-shaped guide rail body 601 are given.

[0034] Furthermore, such as Figure 3As shown, the sealing end cap 604 has multiple stepped holes B1301 spaced apart, and the corresponding V-shaped guide rail 601 has multiple threaded holes B1302 at both ends. Hexagon socket head caps B1303 are installed in the stepped holes B1301. The sealing end cap 604 is fastened to the V-shaped guide rail 601 by installing the hexagon socket head caps B1303 into the threaded holes B1302. The specific threaded connection form of the sealing end cap 604 is given, ensuring reliable installation.

[0035] An automatic temperature control method for the guideway of a precision and high-efficiency CNC cylindrical grinding machine, comprising the automatic temperature control device as described above; the method includes:

[0036] First, the temperature sensor 608 in each of the intelligent temperature control modules 6 collects the temperature of the V-shaped guide rail 601 in the module in real time and transmits the temperature data to the PLC controller 12 in real time.

[0037] Secondly, when the temperature value in one or more of the guide rail intelligent temperature control modules 6 exceeds the temperature value set by the intelligent control system, the air conditioner 11 is started, and the solenoid valve 10 corresponding to the guide rail intelligent temperature control module 6 whose temperature exceeds the temperature value set by the intelligent control system is opened. The cold air enters the guide groove 605 through the air inlet pipe 9 and the air inlet hole 606, and enters all the cooling holes 603 in the V-shaped guide rail body 601 through the guide groove 605 for cooling, and finally is discharged through the exhaust hole 607.

[0038] Furthermore, when the temperature of the cooling guide rail intelligent temperature control module 6 drops to the set temperature value of the intelligent control system, the corresponding solenoid valve 10 closes. When the temperature of all guide rail intelligent temperature control modules 6 drops to the set temperature value of the intelligent control system, the PLC controller 12 intelligently controls the air conditioner 11 to stop working.

[0039] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this application.

Claims

1. An automatic temperature control device for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine, characterized in that, The system includes a bed and a worktable. The worktable has a headstock and a tailstock on its upper part. A linear guide rail is located on the outer side of the upper part of the bed. Multiple intelligent temperature control modules are located along the length of the inner side of the upper part of the bed. The worktable is located above the intelligent temperature control modules and the linear guide rails. Each intelligent temperature control module includes a V-shaped guide rail body mounted on the bed. A positioning block is located at the lower end of the V-shaped guide rail body along its length. The V-shaped guide rail body has two rows of cooling holes arranged in a V-shape, each row containing multiple cooling holes spaced apart. Sealing end caps are located at both ends of the V-shaped guide rail body. The inner side of each sealing end cap... The system includes a guide channel that communicates with all cooling holes. One sealed end cap has an air inlet that communicates with the guide channel, and the other sealed end cap has an exhaust port that communicates with the guide channel. A temperature sensor is located in the middle of the V-shaped guide rail. A guide positioning groove is provided on the inner side of the upper part of the bed along its length. The V-shaped guide rail is positioned on the bed by the cooperation of the positioning block and the guide positioning groove and is fastened to the bed by threaded connection A. Each air inlet is connected to a solenoid valve and an air conditioner in sequence through an air inlet pipe. The temperature sensor, solenoid valve, and air conditioner are connected to a PLC controller to form an intelligent control system.

2. The automatic temperature control device for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine according to claim 1, characterized in that, The guide positioning groove is provided with multiple threaded holes A at intervals along its length direction, and the corresponding V-shaped guide rail body is provided with multiple stepped holes A at intervals along its length direction at the middle position. The stepped holes A are provided with internal hex bolts A, and the V-shaped guide rail body is fastened to the bed by installing internal hex bolts A on the threaded holes A.

3. The automatic temperature control device for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine according to claim 2, characterized in that, The V-shaped guide rail body is inclined with a mounting hole in the middle, and the temperature sensor is installed on the mounting hole. The front end of the temperature sensor is close to the V-shaped working surface of the V-shaped guide rail body.

4. The automatic temperature control device for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine according to claim 3, characterized in that, The sealing end cap is installed on the V-shaped guide rail body via a threaded connection B, and a sealing gasket is provided between the sealing end cap and the V-shaped guide rail body. The sealing gasket has a through hole corresponding to the position of the guide groove; or, the sealing end cap is connected to the V-shaped guide rail body by sealant.

5. The automatic temperature control device for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine according to claim 4, characterized in that, The sealing end cap is provided with a plurality of stepped holes B at intervals, and the corresponding V-shaped guide rail body is provided with a plurality of threaded holes B at both ends. The stepped holes B are provided with hexagonal socket bolts B, and the sealing end cap is fastened to the V-shaped guide rail body by installing the hexagonal socket bolts B on the threaded holes B.

6. An automatic temperature control method for the guide rails of a precision and high-efficiency CNC cylindrical grinding machine, characterized in that, The automatic temperature control device for the guide rail of a precision and high-efficiency CNC cylindrical grinding machine as described in claim 5, wherein the automatic temperature control method includes: First, the temperature sensor in each of the intelligent temperature control modules of the guide rail autonomously collects the temperature of the V-shaped guide rail body in the module in real time and transmits the temperature data to the PLC controller in real time. Secondly, when the temperature value in one or more of the guide rail intelligent temperature control modules exceeds the temperature value set by the intelligent control system, the air conditioner is turned on and the solenoid valve corresponding to the guide rail intelligent temperature control module whose temperature exceeds the temperature set by the intelligent control system is opened. The cold air enters the guide groove through the air inlet pipe and air inlet hole, and then enters all the cooling holes in the V-shaped guide rail body for cooling, and finally is discharged through the exhaust hole. Furthermore, when the temperature of the cooling rail intelligent temperature control module drops to the set temperature value of the intelligent control system, the corresponding solenoid valve closes. When the temperature of all rail intelligent temperature control modules drops to the set temperature value of the intelligent control system, the PLC controller intelligently controls the air conditioner to stop working.

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