Special integrated control system for rapier loom
By integrating a dedicated control system for rapier looms, the problem of high failure rate was solved, enabling precise parameter setting and rapid fault detection and handling, thus reducing maintenance difficulty and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2026-04-03
AI Technical Summary
The existing rapier loom control system has a high failure rate, is difficult to adapt to unstable voltage in China, is difficult and costly to maintain, and lacks an integrated fault detection and processing module.
Design a dedicated integrated control system for rapier looms, integrating parameter setting module and fault detection and processing module, including brake clutch plate, main board, touch screen, fault diagnosis and processing module, etc., to achieve rapid fault detection and repair.
By integrating the control system, the failure rate is reduced, precise parameter setting and rapid fault detection and handling are achieved, and maintenance difficulty and cost are reduced.
Smart Images
Figure CN121785183A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of rapier loom technology, specifically relating to a dedicated integrated control system for rapier looms. Background Technology
[0002] Rapier looms are the most widely used looms. In addition to their high speed, high degree of automation, and high efficiency, their active weft insertion method has strong adaptability to various types of yarns. Furthermore, rapier looms have a significant advantage in multi-color weft weaving, and can produce yarn-dyed products with up to 16 colors of weft yarn.
[0003] Most of the existing control systems used in rapier looms are imported from abroad, such as the Dornier rapier loom control system. Both imported and domestically produced rapier looms suffer from high failure rates. In particular, imported rapier looms are difficult to adapt to the unstable voltage in China, making repairs troublesome and costly after a failure. Therefore, it is essential to design a dedicated integrated control system for rapier looms that integrates a fault detection and processing module. Summary of the Invention
[0004] This invention provides a dedicated integrated control system for rapier looms, which reduces the failure rate and enables rapid repair by integrating a parameter setting module and a fault detection and processing module, thereby solving the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a dedicated integrated control system for rapier looms, comprising a housing and an integrated module, wherein the integrated module is installed in the housing, and the integrated module includes a brake clutch plate, a main board, an adapter plate, a main machine start button, a color selection plate, a stop button, a weft feed pre-drive, a weft feed post-drive, a main switch, a terminal block, a take-up driver, a warp feed driver, a main machine frequency converter, a slow-speed frequency converter, and a switching power supply;
[0006] The enclosure is equipped with a touch screen. The main unit start button and the stop button are connected to the main switch. The main switch is connected to the main board through the adapter plate. The stop button is electrically connected to the brake clutch plate. The enclosure is also equipped with the wiring terminals for electrical connection. The touch screen is electrically connected to the debugging module. The debugging module includes a password input module and a parameter setting module. The parameter setting module opens the interface by inputting passwords of different levels of access through the password input module.
[0007] The parameter setting module includes a tension setting module, a weft density setting module, a warp feed parameter adjustment module, a take-up parameter adjustment module, a weft feed system parameter adjustment module, a fast machine speed setting module, a fixed-length weaving length adjustment module, a pattern editing module, and a color selection module.
[0008] The tension setting module sets the upper and lower limits for tension alarms; the weft density setting module can edit the main weft density; the warp feed parameter adjustment module is connected to the warp feed driver, and the screen displays the warp beam diameter parameters; the take-up parameter adjustment module is connected to the take-up driver, and adjusts the tension by controlling the motor speed; the weft feed system parameter adjustment module includes the weft feed front drive and the weft feed rear drive, and can set the roller diameter and yarn feed length of the weft feed motor; the express speed setting module can edit the express speed; the fixed-length weaving length adjustment module can set the required weaving length and measure the actual fabric length; the pattern editing module performs pattern editing and setting; the color selection module includes the color selection panel, and controls the adjustment of the shuttle return time and movement direction of the motor color selector.
[0009] The enclosure is equipped with conventional fault diagnosis and processing modules, including encoder reversal processing module, slow train fault processing module, fast train fault processing module, main clutch overcurrent fault processing module, weft finding fault processing module, positioning slow movement failure processing module, main motor not started processing module, oil pressure alarm processing module, color selection input alarm processing module, weft breakage processing module, and weft finding area abnormal alarm processing module.
[0010] The main motor is controlled by the main unit frequency converter, the idle motor is controlled by the idle motor frequency converter, and the switch is electrically connected to the switching power supply.
[0011] The encoder reversal processing module includes a loom direction detection module and a loom direction judgment module; the slow-speed fault processing module includes an alarm cancellation button located on the touch screen, as well as slow-speed motor, main brake, and slow-speed clutch action detection modules; the fast-speed fault processing module includes an alarm reset button located on the display screen, as well as main brake and main brake action detection modules; the main clutch overcurrent fault processing module includes a short-circuit detection module for the brake, slow-speed clutch, and reverse clutch coils; the weft-finding fault processing module includes an encoder angle detection module and a reverse weft-finding action detection module; the positioning slow-motion failure processing module includes a loom angle detection module and a brake high-voltage module; the main motor not started processing module includes a thermal relay action detection module for the main motor, slow-speed motor, and suction motor; the hydraulic pressure alarm processing module includes a hydraulic pressure switch contact detection module; the color selection input alarm processing module includes a color selection input indicator light and a corresponding color selection input indicator light detection module; the weft breakage processing module includes a sensitivity detection module for each hole position of the weft yarn detector and a detector plug detection module; the weft-finding area abnormal alarm processing module includes a weft-finding position proximity switch sensing module.
[0012] Preferably, the default factory password for the password input module is: Level 1 operator password, which can modify common parameters such as weft density and tension; Level 2 mechanic password, which can modify functional parameters such as loom angle; Level 3 technician password, which can modify various parameters in the system; and higher-level users can modify the operation passwords of lower-level users.
[0013] Preferably, the conventional fault diagnosis and handling module further includes a button abnormal operation alarm module.
[0014] Preferably, the enclosure is equipped with a USB interface.
[0015] Preferably, the enclosure is also equipped with fan overheat protection, fan contactor, air switch, fuse box and isolation transformer.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] 1. This system integrates a parameter setting module, which facilitates the precise setting and adjustment of tension, weft density, warp feed parameters, take-up parameters, weft feed system parameters, fast machine speed, fixed-length weaving length, pattern editing, and color selection, thereby reducing the failure rate.
[0018] 2. This system integrates a fault detection and processing module, which can be used to detect and process encoder reversal, slow train fault, fast train fault, main clutch overcurrent fault, weft search fault, positioning slow movement failure, main motor not started, oil pressure alarm, color selection input alarm, weft breakage, and weft search area abnormal alarm, which helps to reduce faults and facilitate rapid repair. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the system structure of the present invention;
[0020] Figure 2 This is a schematic diagram of the touchscreen structure of the present invention;
[0021] Figure 3 This is a schematic diagram of the debugging module, password input module, and parameter setting module of the present invention;
[0022] Figure 4 This is a schematic diagram of the conventional fault diagnosis and processing module of the present invention.
[0023] In the diagram: 1. Housing; 2. Brake clutch plate; 3. Main board; 4. Adapter plate; 5. Main unit start button; 6. Color selection panel; 7. Stop button; 8. Weft feed front drive; 9. Weft feed rear drive; 10. Main switch; 11. Terminal block; 12. Take-up driver; 13. Warp feed driver; 14. Main unit frequency converter; 15. Slow-speed frequency converter; 16. Switching power supply; 17. Touch screen; 18. Debugging module; 19. Password input module; 20. Parameter setting module; 21. Tension setting module; 22. Weft density setting module; 23. Warp feed parameter adjustment module; 24. Take-up parameter adjustment module; 25. Weft feed system parameter adjustment module; 26. Fast-speed setting module; 27. 1. Fixed-length weaving length adjustment module; 28. Pattern editing module; 29. Color selection module; 30. Routine fault diagnosis and handling module; 31. Encoder reverse processing module; 32. Slow-speed fault handling module; 33. Fast-speed fault handling module; 34. Main clutch overcurrent fault handling module; 35. Weft finding fault handling module; 36. Positioning slow movement failure handling module; 37. Main motor not started handling module; 38. Oil pressure alarm handling module; 39. Color selection input alarm handling module; 40. Weft breakage handling module; 41. Weft finding area abnormal alarm handling module; 42. Fan overheat protection; 43. Fan contactor; 44. Air switch; 45. Fuse box; 46. Isolation transformer. Detailed Implementation
[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] Please see Figure 1-4 This invention provides a dedicated integrated control system for rapier looms, comprising a housing 1 and an integrated module. The integrated module is installed inside the housing 1 and includes a brake clutch plate 2, a main board 3, an adapter plate 4, a main machine start button 5, a color selection plate 6, a stop button 7, a weft feed pre-drive 8, a weft feed post-drive 9, a main switch 10, a terminal block 11, a take-up driver 12, a warp feed driver 13, a main machine frequency converter 14, a slow-speed frequency converter 15, and a switching power supply 16.
[0026] The enclosure 1 is equipped with a touch screen 17. The main start button 5 and the stop button 7 are connected to the main switch 10. The main switch 10 is connected to the main board 3 through the adapter plate 4. The stop button 7 is electrically connected to the brake clutch plate 2. The enclosure 1 is also equipped with the terminal block 11 for electrical connection. The touch screen 17 is electrically connected to the debugging module 18. The debugging module 18 includes a password input module 19 and a parameter setting module 20. The parameter setting module 20 opens the interface by inputting passwords of different levels of permissions through the password input module 19.
[0027] The parameter setting module 20 includes a tension setting module 21, a weft density setting module 22, a warp feed parameter adjustment module 23, a take-up parameter adjustment module 24, a weft feed system parameter adjustment module 25, a fast machine speed setting module 26, a fixed-length weaving length adjustment module 27, a pattern editing module 28, and a color selection module 29.
[0028] The tension setting module 21 sets the upper and lower limits of the tension alarm. The tension value is obtained from the value displayed on the screen when the warp yarn is pulled to meet the start-up conditions. This value can be used as the set tension. The upper and lower limits of the tension alarm, as well as the three-phase parameters of the winding diameter, are also set. The weft density setting module 22 can edit the main weft density dimension. After the machine starts running, it measures whether the woven fabric meets the set weft density value. If it does not meet the value, the parameters are adjusted. This parameter password is changed to find the winding and yarn feeding. The sign of this parameter determines the direction of the take-up motor. The larger this parameter is, the faster the take-up motor runs, and the smaller the weft density is. The warp feed parameter adjustment module 23 is connected to the warp feed... The screen displays the warp beam diameter parameter via driver 13. The sign of this parameter determines the direction of the warp feed motor. The larger this parameter is, the faster the warp feed motor runs, and the tension will decrease in a short time. Once the tension stabilizes, the displayed warp beam diameter should be close to the actual warp beam diameter. The larger the parameter, the larger the displayed warp beam diameter. Once this parameter is set, it does not need to be changed later; after changing the warp beam, only the warp beam winding diameter needs to be set. The take-up parameter adjustment module 24 is connected to the take-up driver 12 and adjusts the tension by controlling the motor speed. When the actual tension increases, the motor speed should be slowed down. Once this parameter is set, it does not need to be changed later. After the fabric is laid, only the warp yarn diameter needs to be set; the weft yarn feeding system parameter adjustment module 25 includes the weft feeding front drive 8 and the weft feeding rear drive 9, which can set the roller diameter and yarn feeding length of the weft yarn feeding motor; the express speed setting module 26 can edit the express speed; the fixed-length weaving length adjustment module 27 can set the length to be woven and measure the actual fabric length. For example, if the set length is 10 meters, the actual woven fabric length is 9.5 meters, and the calculated fabric shrinkage value is 9.5 / 10 = 95%. After setting the shrinkage, the machine is turned on, tested, and fine-tuned until it is accurate; the pattern editing module 28 To edit and set the pattern, first click "Weaving Pattern," then click "Pattern Editing," then click "Edit New Pattern," and finally edit the heald frame and color selection. Save the pattern, open the weaving file, and you can view the text information in the pattern file. You can also view the information of each weft by pressing "Advance / Retreat Weft." The color selection module 29 includes the color selection plate 6, which controls the adjustment of the down-shuttle return time and movement direction of the color selector. The down-shuttle and return times of the color selection slow and fast movements can be set. If the down-shuttle and up-shuttle directions of the color selection are exactly opposite, or if the initial position of the color selection rod is incorrect, the corresponding two wire positions on the motor plug need to be changed.
[0029] The housing 1 is equipped with a conventional fault diagnosis and processing module 30, including an encoder reversal processing module 31, a slow-speed fault processing module 32, a fast-speed fault processing module 33, a main clutch overcurrent fault processing module 34, a weft-finding fault processing module 35, a positioning slow-motion failure processing module 36, a main motor not started processing module 37, a hydraulic alarm processing module 38, a color selection input alarm processing module 39, a weft breakage processing module 40, and a weft-finding area abnormality alarm processing module 41.
[0030] The main motor is controlled by the main inverter 14, the slow motor is controlled by the slow inverter 15, and the switch is electrically connected to the switching power supply 16.
[0031] The encoder reversal processing module 31 includes a loom rotation detection module and a loom rotation judgment module. The reason for this is that the encoder signal detected by the host is different from the actual preset. The loom rotation detection module checks the actual rotation of the loom and determines whether it conforms to the standard. If it does, it indicates that the parameter setting is incorrect. If it does not, it gives a prompt to replace any two phase power lines of the main motor. If the parameters and direction are accurate, it gives a prompt to check the encoder and wiring. The slow-speed fault processing module 32 includes an alarm clearing button located on the touch screen 17, as well as a slow-speed motor, main brake, and slow-speed clutch action detection module. The fault cause is that the encoder signal detected by the host does not change when the loom is running at slow speed. To prevent the fault from escalating, the alarm reset button on the display screen needs to be clicked to clear the alarm. The motion detection module sequentially checks whether the slow-speed motor, main brake, and slow-speed clutch have corresponding actions. If any of them do not act, it provides the corresponding processing prompt. The fast-speed fault handling module 33 includes an alarm reset button located on the display screen, as well as a main brake and main brake actuator motion detection module. Fault cause: The main unit detects that the encoder signal does not change when starting the machine, or the loom speed changes too much during operation. To prevent the fault from escalating, the alarm reset button on the display screen needs to be clicked to clear the alarm. The motion detection module checks whether the main brake and main brake actuator have corresponding actions. If any of them do not act, it provides the corresponding processing prompt. The main clutch overcurrent... The fault handling module 34 includes a short-circuit detection module for the brake, slow-speed clutch, and reverse clutch coils. The fault cause is that the actual current of each coil exceeds the circuit board's set current. The coil short-circuit detection module measures whether the coils of the brake, slow-speed clutch, and reverse clutch are short-circuited, open-circuited, or short-to-ground. If a coil short-circuit or insufficient resistance is found, or if it is short-to-ground, the corresponding switching transistor is further measured for damage, and a prompt is given indicating whether the transistor should be replaced. The weft-finding fault handling module 35 includes an encoder angle detection module and a reverse weft-finding action detection module. The fault cause is that during forward and reverse weft-finding actions, the encoder does not reach the specified angle or the reverse gear disengages, causing yarn slippage. The encoder angle is incorrect, and a prompt is given, such as an encoder angle error. Normally, the alarm is cleared by completing one reversing action. The reverse weft-finding action is then detected. The reversing clutch is disengaged, the slow-speed motor starts, and the sheathing device rotates one revolution. If an incorrect action is detected, a corresponding troubleshooting prompt is given. The positioning slow-motion failure handling module 36 includes a loom angle detection module and a brake high-voltage module. The cause of the failure is: the actual loom angle has not reached the specified angle, the deviation is too large, or the main brake clearance is too large. The deviation between the actual loom angle and the set angle is detected, and the corresponding parameters are set. If the failure is caused by the main brake clearance being too large, or by the loom being passively moved by the head in pure frequency conversion mode due to heavy load, the brake high-voltage time and high-voltage voltage are appropriately increased to compensate.The main motor not started processing module 37 includes a detection module for the thermal relays of the main motor, idle motor, and suction motor. The fault cause is: the main unit contactor has not started, or after starting, the auxiliary contact signal on its main contactor has not been transmitted to the main board. The detection module checks whether the thermal relays of the main motor, idle motor, and suction motor have activated. If they have popped out, it prompts for reset and measures whether the motors are short-circuited. If the contactor has engaged, but the main screen still displays "main motor not started," it checks the indicator lights on the main board for prompts. If the indicator lights are not lit, it prompts for a response. Replace the auxiliary contactor on the main contactor. If it is engaged and the indicator light is on, but the main screen still displays "Main motor not started," it prompts to replace the main board. The hydraulic alarm processing module 38 includes a hydraulic switch contact detection module. The fault cause is: after the loom starts running at high speed, the main board does not detect the hydraulic switch signal. The detection module detects whether there is a change in the continuity of the hydraulic switch contacts. In the normally closed state (no oil flow), the two ends of the switch are in a conductive state, and the main board indicator light is on. In the normally open state (no oil flow), the two ends of the switch are in an open state, and the main board indicator light is on. The indicator light is off. This indicator light is for the hydraulic pressure switch, and it has two states: oil present and oil absent. The color selection input alarm processing module 39 includes a color selection input indicator light and a corresponding color selection input indicator light detection module. The cause of the fault is that after the loom is running at high speed, the main board does not detect the color selection signal of the electronic jacquard machine, or detects multiple color selection signals. It checks whether the color selection input indicator light is lit effectively. If one light is off, it indicates no color selection input; if two or more light up, it indicates too many color selection inputs. The weft breakage processing module 40 includes a weft yarn detector hole sensitivity detection module and a detector plug detection module. The cause of the fault is that the weft yarn detector is damaged or the sensitivity is not accurately adjusted. It checks the sensitivity of each hole by pulling the weft yarn through each hole one by one and checking whether the weft detection progress bar on the screen moves significantly. If there is no change in the progress bar, the detection module checks the detector plug and indicates the connection status. The weft seeking area abnormality alarm processing module 41 includes a weft seeking position proximity switch sensing module. This switch is used to protect the loom during weft seeking, ensuring that the rapier is outside the steel buckle, which can effectively prevent damage to the rapier and steel buckle due to asynchronous weft seeking.
[0032] The default factory passwords for the password input module 19 are: Level 1 operator password, which can modify common parameters such as weft density and tension; Level 2 mechanic password, which can modify functional parameters such as loom angle; Level 3 technician password, which can modify various parameters in the system; and higher-level operators can modify lower-level operators' passwords. In this embodiment, different levels of operator permissions are isolated to prevent erroneous operation of parameters outside the operator's permissions from affecting equipment operation or even damaging the equipment.
[0033] See Figure 4The conventional fault judgment and processing module 30 also includes a button abnormal operation alarm module; in this embodiment, it alerts users to improper button operation. If an improper button operation is performed, a stop button signal is generated simultaneously with the start button to alert the user and protect the equipment.
[0034] The enclosure 1 is equipped with a USB interface; in this embodiment, it can be used to burn programs and copy system parameters.
[0035] See Figure 1 The enclosure 1 is also equipped with a fan overheat protection 42, a fan contactor 43, an air switch 44, a fuse box 45, and an isolation transformer 46. In this embodiment, when the equipment experiences an abnormally high temperature, the fan is cooled down. At the same time, the air switch 44 and fuse box 45 provide protection in case of short circuit or overload, and the isolation transformer 46 achieves electrical isolation to protect the equipment and personal safety.
[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A dedicated integrated control system for rapier looms, comprising a housing (1) and an integrated module, characterized in that, The integrated module is installed in the housing (1). The integrated module includes a brake clutch plate (2), a main board (3), an adapter plate (4), a main unit start button (5), a color selection plate (6), a stop button (7), a weft feed front drive (8), a weft feed rear drive (9), a main switch (10), a terminal block (11), a take-up driver (12), a warp feed driver (13), a main unit frequency converter (14), a slow car frequency converter (15), and a switching power supply (16). The enclosure (1) is equipped with a touch screen (17). The start button (5) and stop button (7) of the main unit are connected to the main switch (10). The main switch (10) is connected to the main board (3) through the adapter plate (4). The stop button (7) is electrically connected to the brake clutch plate (2). The enclosure (1) is also equipped with the terminal block (11) for electrical connection. The touch screen (17) is electrically connected to the debugging module (18). The debugging module (18) includes a password input module (19) and a parameter setting module (20). The parameter setting module (20) opens the interface by inputting passwords of different levels of permissions through the password input module (19). The parameter setting module (20) includes a tension setting module (21), a weft density setting module (22), a warp feed parameter adjustment module (23), a take-up parameter adjustment module (24), a weft feed system parameter adjustment module (25), a fast machine speed setting module (26), a fixed-length weaving length adjustment module (27), a pattern editing module (28), and a color selection module (29). The tension setting module (21) sets the upper and lower limits of the tension alarm; the weft density setting module (22) can edit the main weft density size; the warp feed parameter adjustment module (23) is connected to the warp feed driver (13), and the screen displays the warp beam diameter parameter; the take-up parameter adjustment module (24) is connected to the take-up driver (12), and the tension is adjusted by controlling the speed of the motor; the weft feed system parameter adjustment module (25) includes the weft feed front drive (8) and the weft feed rear drive (9), and can set the roller diameter and yarn feed length of the weft feed motor; the express speed setting module (26) can edit the express speed; the fixed-length weaving length adjustment module (27) can set the length to be woven and measure the actual fabric length; the pattern editing module (28) performs pattern editing and setting; the color selection module (29) includes the color selection plate (6), and controls the adjustment of the shuttle return time and the movement direction of the motor color selector; The housing (1) is equipped with a conventional fault judgment and processing module (30), including an encoder reversal processing module (31), a slow-speed fault processing module (32), a fast-speed fault processing module (33), a main clutch overcurrent fault processing module (34), a weft-finding fault processing module (35), a positioning slow-motion failure processing module (36), a main motor not started processing module (37), an oil pressure alarm processing module (38), a color selection input alarm processing module (39), a weft break processing module (40), and a weft-finding area abnormal alarm processing module (41). The main motor is controlled by the main inverter (14), the slow motor is controlled by the slow inverter (15), and the switch is electrically connected to the switching power supply (16). The encoder reversal processing module (31) includes a loom direction detection module and a loom direction judgment module; the slow-speed fault processing module (32) includes an alarm clearing button located on the touch screen (17), and slow-speed motor, main brake, and slow-speed clutch action detection modules; the fast-speed fault processing module (33) includes an alarm reset button located on the display screen, and main brake and main brake action detection modules; the main clutch overcurrent fault processing module (34) includes a coil short-circuit detection module for the brake, slow-speed clutch, and reverse clutch; the weft-finding fault processing module (35) includes an encoder angle detection module and a reverse weft-finding action detection module. The positioning slow-motion failure processing module (36) includes a loom angle detection module and a brake high-pressure module; the main motor not started processing module (37) includes a main motor, slow-moving motor, and suction motor thermal relay action detection module; the oil pressure alarm processing module (38) includes an oil pressure switch contact detection module; the color selection input alarm processing module (39) includes a color selection input indicator light and a corresponding color selection input indicator light detection module; the weft breakage processing module (40) includes a weft yarn detector hole position sensitivity detection module and a detector plug detection module; the weft-finding area abnormal alarm processing module (41) includes a weft-finding position proximity switch sensing module.
2. The integrated control system for a rapier loom according to claim 1, characterized in that, The default factory password for the password input module (19) is: Level 1 operator password, which can modify common parameters such as weft density and tension; Level 2 mechanic password, which can modify functional parameters such as loom angle; and Level 3 technician password, which can modify various parameters in the system. Users with higher privilege levels can change the passwords of users with lower privilege levels.
3. The integrated control system for a rapier loom according to claim 1, characterized in that, The conventional fault diagnosis and handling module (30) also includes a button abnormal operation alarm module.
4. The integrated control system for a rapier loom according to claim 1, characterized in that, The enclosure (1) is equipped with a USB interface.
5. The integrated control system for a rapier loom according to claim 1, characterized in that, The enclosure (1) is also equipped with a fan overheat protection (42), a fan contactor (43), an air switch (44), a fuse box (45), and an isolation transformer (46).