Oil film cleaning mechanism of semiconductor refrigeration unit

Abstract

The invention discloses an oil film cleaning mechanism of a semiconductor refrigeration unit, comprising: a profile frame, on which a mold positioning mechanism is arranged; and the placing mold is mounted on the mold positioning mechanism. A semiconductor refrigeration unit is arranged; the spraying water pipe is arranged at the top of the profile frame; the roller wiping mechanism comprises a rodless cylinder and a floating roller structure; and the rodless cylinder drives the floating roller structure to do reciprocating motion at the top of the placing mold. According to the scheme, the cleaning efficiency and the quality consistency are improved, and the labor cost and the site requirement are reduced. And due to the modular design, the cleaning mechanism can adapt to refrigeration units of different specifications.

Description

Technical Field

[0001] The invention relates to the technical field of semiconductor refrigerator manufacturing, in particular to an oil film cleaning mechanism of a semiconductor refrigeration unit. Background Art

[0002] At present, when the refrigeration unit is ground (grinding fluid is added to the grinder to carry out the process of parallelism of the upper and lower surfaces of the product), due to the characteristics of the grinding fluid, the static electricity generated by the friction during the grinding process will cause the oil film produced by the grinding fluid to adhere to the surface of the product, resulting in a layer of dirt that is difficult to wipe off on the finished product. The final product needs to be manually wiped with an eraser before shipment, and the degree of cleanliness of the wipe is difficult to control. There is also a lack of corresponding solutions and devices at home and abroad; in view of the diversity of unit product specifications, it faces huge challenges in terms of cleaning cost, efficiency, and rhythm.

[0003] First, the traditional final eraser cleaning method requires more man-hours and has a high product cost; Secondly, traditional manual wiping requires a large number of personnel, occupies more workstations, and has high site costs; Thirdly, traditional manual cleaning causes fatigue and is prone to unclean cleaning, which makes it difficult to control product quality. In summary, in order to optimize the production process of unit products and improve production quality and efficiency, an automated cleaning device is urgently needed.

[0004] Among the currently relatively close technologies, for example, a Chinese patent disclosed a metal coil outer surface oil film removal device, application number CN201110139486.3, including a slide rail, a sliding base plate A, a sliding base plate B, a cleaning rack A, a cleaning rack B, a drying rack A, a drying rack B, a cleaning block, a liquid scraper, a cylinder A, a cylinder B, a cleaning frame and a cleaning liquid pipe. The copper pipe wire passes through the pipe hole, and the piston rods of the cylinder A and the cylinder B are synchronously extended through pneumatic control. When the sliding base plate A When the sliding bottom plate B moves to the closing limit position, the semicircular grooves on the two cleaning blocks are covered on the outer surface of the copper tube and wire. As the cleaning liquid flows into the cleaning block from the liquid inlet hole from the cleaning liquid pipe, during the winding process of the copper tube and wire, the dust and oil attached to the surface of the tube body and wire can be completely removed through chemical cleaning by the cleaning liquid and mechanical scrubbing by the cleaning block. Then, the outer surface of the copper tube and wire is symmetrically scraped with liquid by the scraper sheet at intervals, thereby ensuring the cleanliness of the surface of the copper tube and wire.

[0005] Although the above scheme can not only clean the surface of copper tubes and wires, but also dry them, and can stably ensure the surface cleanliness of copper tubes and wires, it is used in this field because different series of refrigeration units have different specifications, and their volumes and shapes are quite different from those of copper tubes and wires. In addition, in the face of more numerous and smaller precision refrigeration units, this scheme requires a more suitable scheme for effective cleaning. Summary of the invention

[0006] In order to overcome the many problems of the traditional manual wiping method, the present invention not only improves the cleaning efficiency and quality consistency, but also reduces the labor cost and site requirements through the combined design of the profile frame, mold positioning mechanism, mold placement, spray water pipe and roller wiping mechanism. Its modular design concept and flexible adjustability enable the cleaning mechanism to adapt to refrigeration units of different specifications, providing a new solution for the production process optimization of the refrigeration industry.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A hanging rod that can be used to assist in surface preparation inside a hole, comprising: A profile frame, wherein a mold positioning mechanism is provided on the profile frame; Place the mold and install it on the mold positioning mechanism. Equipped with a semiconductor refrigeration unit; A spray water pipe, the spray water pipe is arranged on the top of the profile frame; A roller wiping mechanism, the roller wiping mechanism comprising a rodless cylinder and a floating roller structure; Wherein, the rodless cylinder drives the floating roller structure to reciprocate on the top of the mold.

[0008] The profile frame provides a stable support structure, and the mold positioning mechanism ensures the accurate positioning of the mold, which is conducive to the precise implementation of subsequent cleaning operations. The spray water pipe is set at the top, which can evenly spray the cleaning liquid and effectively cover the area to be cleaned. The roller wiping mechanism adopts a rodless cylinder driven floating roller structure, so that the roller can adapt to the slight height changes of the mold surface to ensure the uniformity and thoroughness of cleaning. The reciprocating motion of the floating roller structure can effectively remove the oil film and improve the cleaning efficiency. The overall structure of this solution is compact and easy to operate. It is suitable for cleaning needs in mass production and significantly improves the cleanliness and production efficiency of semiconductor refrigeration units.

[0009] Preferably, a pull-out mechanism is included, and the pull-out mechanism is slidably mounted on the profile frame; the mold positioning mechanism is detachably mounted on the pull-out mechanism. The pull-out mechanism is slidably mounted on the profile frame to achieve rapid withdrawal and insertion of the mold positioning mechanism. This solution allows operators to perform loading and unloading operations outside the frame, reducing operation time and labor intensity. The mold positioning mechanism is detachably mounted on the pull-out mechanism. This detachable structure increases the flexibility of the system and facilitates rapid switching of different models of products and equipment maintenance. The pull-out mechanism takes ergonomics into consideration, and operators do not need to bend over or reach into the interior of the equipment, effectively reducing the risk of work-related injuries. In addition, the pull-out mechanism can also achieve the closed nature of the cleaning process, prevent splashing of the cleaning liquid, and improve the cleanliness of the working environment.

[0010] Preferably, the mold positioning mechanism comprises: a positioning plate, which is arranged on the bottom plate of the profile frame; A plurality of positioning pins; a positioning hole is provided on the positioning plate corresponding to the positioning pin; wherein, a positioning hole matching the positioning pin is provided at the bottom of the placement mold, and the placement mold can be positioned on the mold positioning mechanism. The positioning plate is fixed on the bottom plate of the profile frame as a basic structure to provide stable support for the entire positioning system. A plurality of positioning pins precisely match the positioning holes on the positioning plate to form a high-precision three-dimensional positioning system. It not only ensures the accurate positioning of the placement mold in the horizontal and vertical directions, but also prevents the mold from displacement or rotation during the cleaning process. The matching positioning holes designed at the bottom of the placement mold further enhance the positioning accuracy, so that each cleaning operation can be consistent. Compared with the traditional manual alignment method, this positioning method not only improves the positioning accuracy, but also shortens the loading and unloading time. Accurate positioning also ensures the uniformity of the spraying and wiping process, and improves the cleaning effect. In addition, this solution also facilitates the rapid replacement of placement molds of different specifications, enhancing the adaptability and flexibility of the equipment.

[0011] Preferably, the pulling mechanism comprises: a slide rail, which is parallelly mounted on both sides of the profile frame; a slider, which is slidably connected to the slide rail; and a push-pull plate, which is fixed on the slider and carries the placement mold; A handle, which is arranged at the front end of the push-pull plate to facilitate operators to pull out or push in the pull-out mechanism; a limit block, which is arranged at the end of the slide rail to prevent the slider from leaving the slide rail.

[0012] Preferably, the placement mold includes: a placement mold, which is a rectangular plate-like structure; a plurality of grooves, the groove array is distributed on the upper surface of the placement mold, and the shape of each groove matches the shape of the semiconductor refrigeration unit; a positioning protrusion, the positioning protrusion is arranged at the bottom of the placement mold and cooperates with the mold positioning mechanism; a drainage hole, the drainage hole is arranged at the bottom of each groove. The array-distributed groove design solves the problem that multiple semiconductor refrigeration units are difficult to clean at the same time. The shape of each groove accurately matches the shape of the semiconductor refrigeration unit, which not only ensures the stability of the product during the cleaning process, but also maximizes the cleaning area. The positioning protrusion cooperates with the mold positioning mechanism to achieve fast and accurate positioning and improve the efficiency of loading and unloading. The drainage hole arranged at the bottom of each groove ensures that the cleaning liquid can be discharged quickly to prevent water accumulation from affecting the cleaning effect, which not only improves the cleaning efficiency but also reduces the risk of cross contamination.

[0013] Preferably, the floating roller structure comprises: a floating bracket, which is in a U-shaped structure and connected to the piston rod of the rodless cylinder; an elastic element, which is arranged between the floating bracket and the rodless cylinder; a roller, which is cylindrical and covered with a cleaning material; and a bearing, which is installed at both ends of the floating bracket and can support the roller and enable it to rotate freely. The U-shaped floating bracket is connected to the piston rod of the rodless cylinder, and flexible pressure control is achieved through the elastic element, so that the roller can adapt to the slight height change of the product surface and ensure the uniformity of the cleaning pressure. The cleaning material covered on the roller surface can be selected according to different oil film characteristics to improve the cleaning efficiency. Compared with fixed scrubbing, it can better adapt to the unevenness of the product surface and reduce the situation of missed cleaning or over-cleaning. In particular, the elastic element can absorb the vibration during the cleaning process to protect the product surface from damage.

[0014] Furthermore, the roller end is provided with a quick-insert structure, including: an axial end groove, the axial end groove is provided at both ends of the roller; an elastic buckle, the elastic buckle is provided on the floating bracket and matches the axial end groove; a quick-release button, the quick-release button is connected to the elastic buckle, and pressing the quick-release button can release the elastic buckle to achieve quick disassembly of the roller. The precise matching of the axial end groove and the elastic buckle enables the rapid installation and disassembly of the roller, significantly reducing the time required for replacing the roller, thereby improving the utilization rate of the equipment, and the operator only needs to press the button to release the elastic buckle without using any tools. It is not only convenient for daily cleaning and maintenance, but also can quickly replace rollers of different materials or specifications according to different cleaning needs, thereby enhancing the adaptability of the equipment. Compared with the traditional bolt fixing method, the quick-insert structure greatly reduces the difficulty of maintenance and reduces the risk of damage caused by improper operation.

[0015] As a preference, it also includes: a two-hand start button, which is arranged on the operation panel at the front end of the profile frame; a control system, which is arranged inside the profile frame and electrically connected to the two-hand start button; a solenoid valve, which is connected to the spray water pipe and controlled by the control system; and a pneumatic component, which is connected to the rodless cylinder and controlled by the control system. The two-hand start button ensures the safety of the operator and prevents accidents caused by false triggering. The control system is centrally arranged inside the profile frame, which not only saves space but also facilitates unified management and maintenance. The connection between the solenoid valve and the spray water pipe realizes precise water flow control, and the spray intensity and time can be adjusted according to different products and cleaning requirements. In addition, the cooperation between the pneumatic component and the rodless cylinder makes the roller wiping action more accurate and controllable. Compared with traditional decentralized control, this integrated control system has the advantages of fast response speed and good coordination. Through the central control system, rapid adjustment and optimization of cleaning parameters can be achieved to meet the cleaning needs of different products.

[0016] Preferably, it also includes: a magnetic sensor, which is fixed on the inner side of the profile frame; a magnet, which is installed on the push-pull plate of the pull-out mechanism; an indicator light, which is arranged on the operation panel and electrically connected to the magnetic sensor to indicate whether the pull-out mechanism is in place. The magnetic sensor is fixed on the inner side of the profile frame, and forms an induction pair with the magnet on the push-pull plate of the pull-out mechanism, and intuitively feedbacks the position status of the pull-out mechanism through the indicator light, which not only ensures the closedness of the cleaning process, but also avoids the wear and noise problems that may be caused by mechanical limit. The non-contact detection method of magnetic induction has the advantages of fast response speed and long service life. Compared with traditional mechanical switches or photoelectric sensors, it is more suitable for long-term and stable operation in a humid cleaning environment.

[0017] Preferably, it also includes: a water tank, which is arranged at the bottom of the profile frame; a drain pipe, which is connected to the bottom of the water tank; and a filter screen, which is detachably installed above the water tank.

[0018] This solution has the following beneficial effects.

[0019] The positioning pin and the pull-out mechanism work together to achieve fast and accurate loading and unloading of materials, greatly improving production efficiency and reducing manual operation time and labor intensity.

[0020] The combined application of the spray water pipe and the floating roller structure ensures uniformity and thoroughness of cleaning, effectively solving the problem of difficulty in controlling cleanliness with traditional manual wiping.

[0021] Modular design and quick-plug structure make equipment maintenance and cleaning simple and quick, improve equipment availability and adaptability, and reduce maintenance costs.

[0022] The integrated control system design enables precise control and rapid adjustment of cleaning parameters to meet the cleaning requirements of different products and improve production flexibility and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axonometric view of the present invention.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the middle roller wiping mechanism.

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the middle mold positioning mechanism.

[0026] Figure 4 It is the front view of the present invention.

[0027] In the figure: 1. Profile frame; 2. Mould positioning mechanism; 3. Mould placement; 4. Spray water pipe; 5. Roller wiping mechanism; 6. Rodless cylinder; 7. Floating roller structure; 8. Pull-out mechanism; 9. Positioning plate; 10. Slide rail; 11. Slider; 12. Push-pull plate; 13. Groove; 131. Handle; 14. Floating bracket; 15. Elastic element; 16. Roller; 17. Bearing; 18. Quick-insert structure; 19. Semiconductor refrigeration unit; 20. Two-hand start button; 21. Sink; 22. Quick release button. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0029] Example 1 like Figure 1 , 2 As shown, the present invention provides an innovative refrigeration unit oil film cleaning mechanism. The core of this mechanism lies in the integrated design, which combines multiple functional modules to form an efficient and accurate cleaning system. The overall structure is based on the profile frame 1, which not only provides a stable support, but also has the advantages of lightweight and modularization, which is convenient for the transportation and installation of the whole machine. Inside the frame, each functional module is organized into a compact and efficient cleaning unit in a reasonable spatial layout and connection method.

[0030] The mold positioning mechanism 2 uses a positioning pin to ensure the accurate positioning of the placement mold 3. It can not only improve the loading and unloading efficiency, but also provide a stable foundation for the subsequent cleaning process. The positioning pin is precisely matched with the positioning hole at the bottom of the placement mold 3 to form a high-precision three-dimensional positioning system, which effectively prevents displacement and vibration during the cleaning process. The mold positioning mechanism includes: a positioning plate 9, which is arranged on the bottom plate of the profile frame; a positioning hole is opened on the positioning plate corresponding to the positioning pin; wherein, a positioning hole matching the positioning pin is provided at the bottom of the placement mold, and the placement mold can be positioned on the mold positioning mechanism. The positioning plate is fixed on the bottom plate of the profile frame as a basic structure to provide stable support for the entire positioning system. The pulling mechanism 8 adopts the cooperation of the slide rail 10 and the slider 11 to achieve a smooth pulling action. The push-pull plate 12 is fixed on the slider 11 and is equipped with a handle 131, so that the operator can conveniently perform loading and unloading operations. The setting of the limit block further increases safety and prevents the slider 11 from detaching from the slide rail 10.

[0031] The mold 3 is placed to take batch processing efficiency into consideration, and an array layout of grooves 13 is adopted. Each groove 13 is precisely matched with the shape of the refrigeration unit, and 28 semiconductor refrigeration units 19 can be placed at a time, greatly improving the batch processing capacity. The drainage holes set at the bottom of each groove 13 can solve the problem of accumulation of cleaning liquid and ensure the uniformity of the cleaning effect. The floating roller structure 7 is driven by a rodless cylinder 6, and combined with the elastic element 15, the roller 16 can adapt to the slight height changes on the surface of the product. The U-shaped floating bracket 14 not only provides stable support, but also allows the roller 16 to be fine-tuned during the cleaning process to ensure the uniformity and thoroughness of the cleaning. Bearings 17 are installed at both ends of the floating bracket to support the roller and enable it to rotate freely. The surface of the roller 16 is covered with special cleaning materials, which can be selected according to different oil film characteristics to further improve the cleaning effect.

[0032] In this embodiment, the spray water pipe 4 is arranged at the top of the frame, and the water flow is precisely controlled by the solenoid valve, which forms a synergistic effect with the roller wiping to effectively remove the oil film. This design not only improves the cleaning efficiency, but also reduces the amount of cleaning agent used, reflecting the concept of environmental protection. The entire cleaning process is uniformly managed by the central control system, and the safety and reliability of the operation are ensured through safety designs such as the two-hand start button 20 and the magnetic sensor. The water tank 21 and the drainage system ensure the effective collection and treatment of the cleaning waste liquid, further reflecting the concept of environmental protection.

[0033] The present embodiment also discloses a quick-insert structure 18 of the roller, which makes the replacement and maintenance of the roller simple and quick. The precise fit of the shaft end groove 13 and the elastic buckle, combined with the quick release button 22, enables the tool-free quick disassembly and assembly of the roller. This effectively reduces the maintenance cost and downtime of the equipment and improves production efficiency. Those skilled in the art may consider adding multiple sets of rollers or introducing ultrasonic cleaning technology to further improve the cleaning effect. In addition, this solution also reserves interfaces for future intelligent upgrades, such as adding sensors and data acquisition systems, to achieve real-time monitoring and optimization of the cleaning process.

[0034] Specifically, the key components of the oil film cleaning mechanism of the refrigeration unit in this embodiment are as follows: Profile frame 1 is made of 6063-T5 aluminum alloy with a density of about 2.7g / cm³, which has an excellent strength-to-weight ratio. The overall size of the frame is about 1200mm×800mm×1500mm, and it adopts a modular design for easy assembly and maintenance. The frame interface is cut at a 45-degree angle and connected by corner pieces to improve structural stability and load-bearing capacity.

[0035] The positioning pin of the mold positioning mechanism 2 is made of 304 stainless steel with a hardness of HRC 30-35, a diameter of Φ10mm±0.01mm, and a length of 50mm. The clearance between the positioning hole and the pin is controlled within 0.02mm to ensure high-precision positioning. The surface of the positioning pin is precision machined and hardened, with good wear resistance and long service life.

[0036] The slide rail 10 of the pull-out mechanism 8 is made of 40Cr steel with chrome plating on the surface, and the hardness can reach HRC 58-62, with excellent wear resistance and load capacity. The slider 11 is made of high molecular polymer material, with good self-lubrication and a friction coefficient as low as about 0.1. The slide rail 10 is 800mm long, and the slider 11 is 100mm×80mm×30mm in size, and can withstand a load of 200kg.

[0037] The placement mold 3 is made of 6061 aluminum alloy, which has been heat treated to T6 and has a strength of up to 290MPa. The mold size is 600mm×400mm×30mm, and the surface is anodized for strong corrosion resistance. The 28 grooves 13 are precisely machined, each groove 13 has a depth of 5mm, and the edge chamfer R1 ensures that the refrigeration unit is placed stably and is easy to remove.

[0038] The U-shaped bracket of the floating roller structure 7 is made of 304 stainless steel, 3mm thick and 100mm wide. The elastic element 15 is made of 65Mn spring steel, with a wire diameter of 2mm, an outer diameter of 20mm, and a free length of 50mm, which can provide a floating pressure of 0-50N. This design enables the roller to adapt to a height change of ±5mm and ensure uniform cleaning pressure.

[0039] The roller axis of the roller wiping mechanism 5 is made of 304 stainless steel, with a diameter of Φ20mm, and the surface is covered with a polyurethane sponge with a density of 30kg / m³ and a thickness of 15mm. The sponge surface is specially treated to have good hydrophilicity and mechanical strength, and the service life can reach more than 1000 hours.

[0040] The spray water pipe 4 is made of 304 stainless steel pipe with a wall thickness of 1.5mm and a pipe diameter of Φ20mm. The nozzle is made of alumina ceramic material, which has good wear resistance and long service life. The nozzle spacing is 50mm and the spray angle is 60° to ensure uniform cleaning coverage. The water pressure can be adjusted in the range of 0.2-0.5MPa, and the flow rate can be adjusted between 0.5-2L / min.

[0041] The control system uses Siemens S7-1200 series PLC, with 16 digital inputs, 16 digital outputs, and 4 analog inputs and outputs. The 7-inch touch screen has a resolution of 800×480 pixels and uses TFT true color display. The system response time is less than 10ms, and the control accuracy can reach ±0.1%.

[0042] The rodless cylinder 6 adopts an aluminum alloy cylinder body, with an inner diameter of Φ32mm, a stroke of 300mm, and a maximum working pressure of 1MPa. The magnetic coupling slider 11 adopts high-strength engineering plastics, with a built-in rare earth permanent magnet, and the magnetic strength reaches 1.2T. The cylinder moves smoothly and the positioning accuracy can reach ±0.1mm.

[0043] The sink 21 and drainage system are made of 304 stainless steel with a thickness of 2mm and 2B surface treatment. The size of the sink 21 is 700mm×500mm×100mm, and the bottom is designed with a 3° inclination angle to ensure rapid discharge of waste liquid. The diameter of the drain port is Φ50mm, equipped with a detachable filter screen with a mesh size of 0.5mm×0.5mm, which can effectively filter impurities.

[0044] Through the combination of the above components, this mechanism forms an efficient and accurate cleaning system. The cooperation between the positioning mechanism and the pulling mechanism 8 achieves a positioning accuracy of ±0.05mm, greatly improving the consistency of the cleaning quality. The synergistic effect of the floating roller structure 7 and the spray water pipe 4 keeps the cleaning pressure within the range of 20-30N, which not only ensures the cleaning effect but also avoids damage to the product surface. The quick-insert structure 18 shortens the roller replacement time to less than 30 seconds, significantly improving the maintainability of the equipment. The overall design fully considers ergonomics, and the operating height is controlled between 900-1100mm to reduce the fatigue of the operator.

[0045] When the cleaning mechanism based on the oil film removal after the grinding process provided by the present invention is used, the operator needs to start the machine first and wait for the equipment to reset itself to ensure that the equipment is in a normal working state. This is also a safety inspection process. After the equipment is started, the control system will perform a self-check, including detecting the status of each sensor and actuator to ensure that there is no fault and no product left. This process usually takes 10-15 seconds.

[0046] Next, the operator pulls the pull-out mechanism 8 out. The pull-out mechanism 8 is matched with a high-precision slide rail 10 and a slider 11, and the friction coefficient is as low as 0.1, so even a mold fully loaded with 200kg can be easily pulled. The pulling distance is 800mm. Considering ergonomics, the operating height is controlled between 900-1100mm to reduce the fatigue of the operator. After taking out the placement mold 3, the 28 refrigeration units are neatly placed in the mold. The placement mold 3 is made of 6061 aluminum alloy. After T6 heat treatment, the strength can reach 290MPa, and it can withstand frequent loading and unloading and cleaning processes. The 28 grooves 13 on the surface of the mold are precisely processed, each groove 13 is 5mm deep, and the edge chamfer R1 ensures that the refrigeration unit is placed stably and easy to remove.

[0047] When placing the placement mold 3 containing the product into the pull-out mechanism 8, it is necessary to pay attention to aligning the positioning pin. The positioning pin is made of 304 stainless steel, with a diameter of Φ10mm±0.01mm, and the clearance with the positioning hole at the bottom of the mold is controlled within 0.02mm to ensure high-precision positioning. This three-dimensional positioning system can effectively prevent displacement and vibration during the cleaning process and ensure the consistency of the cleaning effect. When pushing the device in, it is necessary to pay attention to the fact that the magnet adsorption should be sensed after it is pushed in place. A magnetic sensor is used here. When the magnetic field strength reaches the preset threshold (usually 0.5-1mT), it means that the mold has been correctly positioned. The operator then needs to press the start button 20 with both hands at the same time to prevent safety problems caused by misoperation. The button adopts a waterproof design with a protection level of IP67 and can work reliably in a humid environment. After the button is pressed, the PLC control system will respond within 10ms and activate the spray water pipe 4 and the rodless cylinder 6 at the same time. The spray water pipe 4 is made of 304 stainless steel with a pipe diameter of Φ20mm, and the water flow is accurately controlled by a solenoid valve. The water pressure can be adjusted within the range of 0.2-0.5MPa, and the flow rate can be adjusted between 0.5-2L / min to adapt to different oil film thicknesses and contamination levels. The nozzle is made of alumina ceramic, which has good wear resistance and a service life of more than 10,000 hours. The nozzle spacing is 50mm and the spray angle is 60° to ensure uniform cleaning coverage.

[0048] At the same time, the rodless cylinder 6 starts working, driving the axle floating module to wipe and clean the upper surface of the product. The rodless cylinder 6 adopts magnetic coupling technology, with an inner diameter of Φ32mm, a stroke of 300mm, and a maximum working pressure of 1MPa. The cylinder moves smoothly, and the positioning accuracy can reach ±0.1mm, ensuring the stability of the wiping process. The floating roller structure 7 is the core innovation of this mechanism. The U-shaped bracket is made of 304 stainless steel, with a thickness of 3mm and a width of 100mm. It is matched with the elastic element 15 made of 65Mn spring steel to provide a floating pressure of 0-50N. This design enables the roller to adapt to the height change of ±5mm, ensuring uniform cleaning pressure, and ensuring the cleaning effect even if there are slight height differences on the surface of the product.

[0049] The roller adopts a quick-insert module design, which can be replaced within 30 seconds, improving the maintainability of the equipment. The roller axis is made of 304 stainless steel, with a diameter of Φ20mm, and the surface is covered with a polyurethane sponge with a density of 30kg / m³ and a thickness of 15mm. The sponge surface has been specially treated to have good hydrophilicity and mechanical strength, and the service life can reach more than 1000 hours. In practical applications, roller surfaces of different hardness and materials can be selected according to different oil film characteristics. For example, for more stubborn oil films, nylon brush rollers with higher hardness can be selected.

[0050] During the cleaning process, the sink 21 and the drainage system work together. The sink 21 is made of 304 stainless steel, 2mm thick, 2B surface treated, and has a size of 700mm×500mm×100mm. The bottom is designed with a 3° inclination angle to ensure rapid discharge of waste liquid. The drain port has a diameter of Φ50mm and is equipped with a detachable filter with a mesh size of 0.5mm×0.5mm to effectively filter impurities. In actual production, it is possible to consider adding a simple water circulation system to recycle part of the cleaning water through filtration and purification, which not only saves water resources but also reduces wastewater treatment costs.

[0051] After cleaning is completed, the operator pulls out the mold and takes out the cleaned product. The entire cleaning process is managed by a central control system, using Siemens S7-1200 series PLC, with 16-point digital input, 16-point digital output, and 4-point analog input and output. The system response time is less than 10ms, and the control accuracy can reach ±0.1%, ensuring precise control and real-time monitoring of the entire cleaning process.

[0052] In practical applications, technicians in this field can adjust the cleaning parameters, such as water pressure, roller pressure, cleaning time, etc., according to the characteristics of different products. Furthermore, it is possible to consider adding a simple visual inspection module to the system for quality inspection after cleaning to further improve the consistency of product quality. Finally, in order to improve production efficiency, it is possible to consider designing a double-station or multi-station cleaning system to achieve continuous production.

[0053] In general, the cleaning mechanism proposed in this embodiment realizes the high efficiency, standardization and intelligence of the refrigeration unit cleaning process through a carefully designed mechanical structure and intelligent control system. Compared with the traditional manual wiping method, it not only greatly improves the cleaning efficiency and quality consistency, but also significantly reduces the labor cost and site requirements. Its modular design concept and flexible adjustability enable the cleaning mechanism to adapt to refrigeration units of different specifications, providing a new solution for the production process optimization of the refrigeration industry.

[0054] Example 2 Based on Example 1, this example proposes a new floating roller mechanism to further improve the efficiency and effect of refrigeration unit cleaning. This solution adopts magnetic levitation technology, combined with a precise force feedback system, to achieve more sensitive and precise pressure control. This mechanism is mainly composed of a permanent magnet, an electromagnetic coil, a force sensor and a microprocessor. The permanent magnet is mounted on the roller bracket to form a magnetic field with the electromagnetic coil fixed on the frame. By adjusting the current of the electromagnetic coil, the floating height and pressure of the roller can be accurately controlled. The force sensor monitors the contact force between the roller and the surface of the product in real time, and the microprocessor dynamically adjusts the current of the electromagnetic coil according to the feedback data, thereby achieving real-time optimization of the pressure.

[0055] In this embodiment, the advantages of the magnetic suspension floating roller mechanism are its rapid responsiveness and precise control capability. The system response time can be less than 1ms, and the pressure control accuracy can reach ±0.1N. Compared with the mechanical elastic element 15 in Example 1, the magnetic suspension system has almost no mechanical wear, which greatly extends the service life of the equipment. At the same time, by adjusting the control algorithm, different pressure curves, such as constant pressure, gradual pressure or pulse pressure, can be achieved to adapt to different types and degrees of oil film contamination. The quick release mechanism adopts a snap-on design combined with shape memory alloy (SMA) technology. Special slots are designed at both ends of the roller shaft to cooperate with the snaps on the bracket. The snaps are made of nickel-titanium shape memory alloy and remain locked at room temperature. When the roller needs to be replaced, the SMA snap is heated (electric heating or hot air can be used) to deform it and release the roller. After cooling, the snap automatically returns to its original shape and firmly locks the new roller. This design not only enables rapid tool-free replacement, but more importantly, it ensures the stability and safety of the roller when rotating at high speed. The roller itself has also been improved and a composite material structure has been adopted. The core is a carbon fiber shaft, and the outer layer is nanofiber bristles, with a diameter of only 20-50 nanometers, which not only ensures the lightweight and high strength of the roller, but also effectively removes the oil film on a microscopic scale. The surface of the nano bristles has been plasma-treated and has super-hydrophobicity, which can effectively prevent oil stains from attaching again. At the same time, the tiny gaps between the bristles can produce capillary action, which helps to evenly distribute the cleaning liquid and quickly discharge the dirt.

[0056] To further improve the cleaning effect, this embodiment also integrates an ultrasonic assisted cleaning system. A circle of piezoelectric ceramic transducers is installed around the roller, and the operating frequency can be adjusted within the range of 20-40kHz. Ultrasonic energy is transmitted to the surface of the product through the cleaning fluid, generating a microbubble cavitation effect, effectively stripping off the stubborn oil film. The synergistic effect of ultrasonic cleaning and mechanical wiping can achieve better cleaning effects in a shorter time. Regarding the control system, this embodiment adopts an adaptive control algorithm based on machine learning. The system automatically optimizes the cleaning parameters by analyzing historical cleaning data and combining real-time monitored parameters (such as roller pressure, cleaning fluid flow, ultrasonic power, etc.). This not only improves the cleaning effect, but also achieves the optimal use of energy and cleaning agents, reducing operating costs.

[0057] The cleaning mechanism in this embodiment can shorten the cleaning time by 30% and improve the cleanliness by 15%. The magnetic suspension system makes the pressure control of the roller more precise, and can automatically adjust according to the degree of contamination in different areas to avoid the problem of over-cleaning or under-cleaning. The SMA quick-release mechanism greatly reduces the roller replacement time from the original 30 seconds to less than 5 seconds, while improving safety. The service life of the composite roller is expected to be extended by 50%, and the ultrasonic auxiliary system can effectively deal with some stubborn stains that are difficult to remove by traditional methods.

[0058] The cleaning mechanism in this embodiment is not only suitable for cleaning refrigeration units, but can also be extended to the cleaning field of other precision parts. By adjusting the roller material, ultrasonic parameters and cleaning liquid formula, different cleaning needs can be flexibly responded to. At the same time, the design reserves interfaces for future intelligent upgrades, and can easily integrate advanced technologies such as machine vision detection and Internet of Things monitoring, further improving the automation and intelligence level of the production line.

Claims

1. An oil film cleaning mechanism for a semiconductor refrigeration unit, characterized in that: include: A profile frame, wherein a mold positioning mechanism is provided on the profile frame; The mold is placed and installed on the mold positioning mechanism, and a semiconductor refrigeration unit is installed; A spray water pipe, the spray water pipe is arranged on the top of the profile frame; A roller wiping mechanism, the roller wiping mechanism comprising a rodless cylinder and a floating roller structure; Wherein, the rodless cylinder drives the floating roller structure to reciprocate on the top of the mold.

2. The cleaning mechanism according to claim 1, characterized in that: It comprises a drawing mechanism, which is slidably mounted on the profile frame; and the mold positioning mechanism is detachably mounted on the drawing mechanism.

3. The cleaning mechanism according to claim 1, characterized in that: The mold positioning mechanism comprises: A positioning plate, the positioning plate is arranged on the bottom plate of the profile frame; Multiple positioning pins; A positioning hole is provided on the positioning plate corresponding to the positioning pin shaft; Wherein, a positioning hole matching with the positioning pin is provided at the bottom of the placement mold, so that the placement mold can be positioned on the mold positioning mechanism.

4. The cleaning mechanism according to claim 2, characterized in that: The pulling mechanism comprises: Slide rails, which are installed in parallel on both sides of the profile frame; A slider, the slider being slidably connected to the slide rail; A push-pull plate, the push-pull plate is fixed on the slide block and carries the placement mold; A handle, the handle being arranged at the front end of the push-pull plate; A limit block is arranged at the end of the slide rail to prevent the slide block from leaving the slide rail.

5. The cleaning mechanism according to claim 1, characterized in that: The placement mold comprises: A placement mold, wherein the placement mold is a rectangular plate-shaped structure; A plurality of grooves, wherein the groove array is distributed on the upper surface of the placement mold, and the shape of each groove matches the shape of the semiconductor refrigeration unit; A positioning protrusion, the positioning protrusion is arranged at the bottom of the placement mold and cooperates with the mold positioning mechanism; A drainage hole is provided at the bottom of each of the grooves.

6. The cleaning mechanism according to any one of claims 1 to 5, characterized in that: The floating roller structure comprises: A floating bracket, which is in a U-shaped structure and connected to the piston rod of the rodless cylinder; An elastic element, wherein the elastic element is arranged between the floating support and the rodless cylinder; A roller, the roller is cylindrical and the surface of which is covered with a cleaning material; Bearings are installed at both ends of the floating bracket to support the roller and enable it to rotate freely.

7. The cleaning mechanism according to claim 6, characterized in that: The roller end is provided with a quick-insertion structure, including: Axle end grooves, the axle end grooves are arranged at both ends of the roller; An elastic buckle, which is arranged on the floating bracket and matches the shaft end groove; A quick release button is connected to the elastic buckle, and pressing the quick release button can release the elastic buckle to achieve quick disassembly of the roller.

8. The cleaning mechanism according to any one of claims 1 to 5, characterized in that: Also includes: A two-hand start button, which is arranged on an operation panel at the front end of the profile frame; A control system, the control system being arranged inside the profile frame and electrically connected to the two-hand start button; A solenoid valve, the solenoid valve is connected to the spray water pipe and is controlled by the control system; A pneumatic element is connected to the rodless cylinder and is controlled by the control system.

9. The cleaning mechanism according to claim 2, characterized in that: Also includes: A magnetic sensor, the magnetic sensor is fixed inside the profile frame; A magnet, wherein the magnet is mounted on the push-pull plate of the pull-out mechanism; An indicator light is arranged on the operation panel and is electrically connected to the magnetic sensor to indicate whether the drawing mechanism is in place.

10. The cleaning mechanism according to claim 1, characterized in that: Also includes: A water tank, arranged at the bottom of the profile frame; A drain pipe connected to the bottom of the sink; A filter screen is detachably mounted above the water tank.

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