High-precision temperature control screw water chiller
By introducing an automated cleaning system into the chiller unit, the dust filter is automatically cleaned using a drive unit and a collection unit. This solves the problem of reduced heat dissipation efficiency caused by dust accumulation on the dust filter, improves the operating accuracy and stability of the equipment, and reduces maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG MEI JI LE REFRIGERATION EQUIP CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-07-07
AI Technical Summary
In the long-term operation of traditional water chillers, dust accumulates on the dust filter, which reduces heat dissipation efficiency, affects temperature control accuracy, and requires frequent manual cleaning, increasing maintenance costs and affecting production continuity.
A high-precision temperature-controlled screw chiller unit was designed, which uses slide rails, sliders, moving plates, brushes and drive devices, combined with a collection device, to achieve automated cleaning of the dust screen. The drive motor drives the brushes to sweep and the vacuum cleaner collects the dust, avoiding secondary dust generation.
It improves cleaning efficiency, maintains optimal equipment operating conditions, enhances cooling efficiency, reduces maintenance costs, extends equipment lifespan, and ensures system stability and accuracy.
Smart Images
Figure CN224470476U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration equipment technology, specifically a high-precision temperature-controlled screw chiller unit. Background Technology
[0002] As is well known, air-cooled screw chillers are named for their key component—the compressor—which uses a screw mechanism. The refrigerant, initially a gaseous substance from the evaporator, is adiabatically compressed by the compressor, becoming a high-temperature, high-pressure state. This compressed gaseous refrigerant then undergoes isobaric cooling and condensation in the condenser, transforming into a liquid refrigerant. This liquid refrigerant then expands to a low pressure through a throttling valve, becoming a gas-liquid mixture. The low-temperature, low-pressure liquid refrigerant absorbs heat from the cooled substance in the evaporator, reverting to a gaseous state. This gaseous refrigerant then re-enters the compressor through pipes, beginning a new cycle. These are the four processes of the refrigeration cycle and the main working principle of a screw chiller. With the increasing demands for precise temperature control in industrial production, high-precision temperature-controlled screw chiller units have been widely used in many fields. However, traditional chiller unit designs often face challenges and limitations, especially during long-term operation.
[0003] During long-term operation, the dust filter at the air inlet of the chiller unit will gradually accumulate a large amount of dust and other particulate matter. These pollutants will hinder airflow and significantly reduce heat dissipation efficiency. This means that the internal cooling system may not be able to remove heat in a timely and effective manner, thus affecting the accuracy of temperature control. In order to maintain optimal working condition, it is usually necessary to disassemble and manually clean the dust filter regularly. This process is not only time-consuming and labor-intensive, but may also cause equipment damage or affect production progress due to improper operation. Frequent manual intervention increases maintenance costs. At the same time, due to the lack of an effective automated cleaning mechanism, the equipment downtime is long, affecting the continuity and efficiency of production. Utility Model Content
[0004] Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a high-precision temperature-controlled screw chiller unit.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-precision temperature-controlled screw chiller unit, comprising a base, a screw chiller unit body, a cooling fan, an air inlet, a dust filter, a drive device, and a collection device. The screw chiller unit body is mounted on the top wall of the base. Multiple cooling fans are mounted on the top of the screw chiller unit body. An air inlet is provided on one side wall of the screw chiller unit body. A dust filter is installed inside the air inlet. A slide rail is mounted on the upper side wall of the screw chiller unit body near the air inlet. A slider is slidably mounted on the slide rail. A movable plate is mounted on the bottom wall of the slider. Brush bristles are mounted on the movable plate near the dust filter. The drive device is mounted above the slide rail. The collection device is mounted on the side wall of the movable plate.
[0008] Furthermore, the present invention is improved in that the driving device includes a fixed plate, a threaded rod, a nut, and a drive motor. Two sets of fixed plates are symmetrically installed on the upper side wall of the screw chiller body near the air inlet. The threaded rod is rotatably installed between the two sets of fixed plates. The drive motor is installed through the side wall of the fixed plate at one end of the threaded rod. The nut is threaded onto the threaded rod. The bottom wall of the nut is fixedly connected to the top wall of the slider.
[0009] Furthermore, an improvement of this utility model is that the drive motor is a servo motor.
[0010] Furthermore, the present invention is improved in that the collecting device includes a groove, a pipe, a suction frame, a vacuum cleaner and a connecting pipe. The groove is provided in the middle of the moving plate, the pipe is installed on the outer wall of the groove, the suction frame is installed at one end of the pipe near the dustproof net, the vacuum cleaner is installed on the top wall of one end of the base (1), and the suction end of the vacuum cleaner and the pipe are connected through the connecting pipe.
[0011] Furthermore, the present invention is improved in that two sets of support plates are symmetrically installed below one end of the screw chiller unit body near the air inlet, a guide rod is fixedly installed between the two sets of support plates, a guide block is slidably installed on the guide rod, and the guide block is fixedly connected to the top wall of the moving plate.
[0012] Furthermore, an improvement of this invention is that the bristles are made of wear-resistant nylon filaments.
[0013] Furthermore, the present invention is improved in that both the slide rail and the slider are T-shaped designs.
[0014] Furthermore, an improvement of this utility model is that the cooling fan is a high-efficiency centrifugal fan.
[0015] (III) Beneficial Effects
[0016] Compared with the prior art, this utility model provides a high-precision temperature-controlled screw chiller unit, which has the following beneficial effects:
[0017] This high-precision temperature-controlled screw chiller unit utilizes a sliding rail, slider, moving plate, brush, and drive device. The drive device, including a fixed plate, threaded rod, nut, and drive motor, enables the slider to reciprocate, thereby driving the moving plate and its brush to automatically clean the dust filter. This method not only improves cleaning efficiency but also ensures cleaning frequency. By promptly removing dust and other particles from the dust filter, it avoids airflow problems caused by blockages, thus maintaining the equipment's optimal operating condition and improving overall cooling efficiency.
[0018] This high-precision temperature-controlled screw chiller unit, through its collection device, allows the suction frame to operate close to the dust filter surface when the brushes clean it, effectively capturing dust and other particles stirred up by the brushes. This design ensures that dust is not redistributed into the air, achieving highly efficient dust collection. Through the negative pressure generated by the vacuum cleaner, dust and particles are directly sucked into the pipes and guided to the inside of the vacuum cleaner for storage via connecting pipes. This method not only improves cleaning efficiency but also avoids secondary dust generation, maintaining the cleanliness of the equipment and the environment. Keeping the dust filter clean ensures the chiller unit maintains optimal operating conditions, guaranteeing the overall system's operational accuracy and stability. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 In this utility model Figure 1 A magnified structural diagram of part A;
[0021] Figure 3 In this utility model Figure 1 A magnified structural diagram of point B in the local area;
[0022] Figure 4 This is a three-dimensional structural diagram of the movable plate, brush bristles, and collecting device of this utility model.
[0023] In the diagram: 1. Base; 2. Screw chiller unit body; 3. Cooling fan; 4. Air inlet; 5. Dust filter; 6. Slide rail; 7. Slider; 8. Moving plate; 9. Brush bristles; 10. Fixed plate; 11. Threaded rod; 12. Nut; 13. Drive motor; 14. Groove; 15. Pipe; 16. Suction frame; 17. Vacuum cleaner; 18. Connecting pipe; 19. Support plate; 20. Guide rod; 21. Guide block. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-4 A high-precision temperature-controlled screw chiller unit includes a base 1, a screw chiller unit body 2, a cooling fan 3, an air inlet 4, a dust filter 5, a drive device, and a collection device. The screw chiller unit body 2 is mounted on the top wall of the base 1. Multiple sets of cooling fans 3 are mounted on the top of the screw chiller unit body 2. An air inlet 4 is opened on one side wall of the screw chiller unit body 2, and a dust filter 5 is installed inside the air inlet 4. The screw chiller unit body 2 is positioned close to the air inlet 4. A slide rail 6 is installed on the upper side wall of one end, and a slider 7 is slidably mounted on the slide rail 6. A movable plate 8 is installed on the bottom wall of the slider 7, and bristles 9 are installed on the end of the movable plate 8 near the dustproof net 5. The driving device is installed above the slide rail 6, and the collecting device is installed on the side wall of the movable plate 8. In this embodiment, when in use, the screw chiller unit body 2 and the cooling fan 3 are turned on, and the chiller unit starts to work, reducing the temperature through the circulation of cooling medium. At the same time, the cooling fan 3 operates to dissipate heat. Excessive heat generation causes dust to accumulate on the dust filter 5 installed inside the air inlet 4 during prolonged use of the screw chiller unit 2. When cleaning the dust filter 5 is required, the drive unit is activated, causing the slider 7 connected to it to move linearly along the slide rail 6. The moving plate 8 moves along with the slider 7, and the brush bristles 9 at its front end sweep away the dust and other particles covering the dust filter 5. The collection device then sucks in and stores the dust swept up by the brush bristles 9. The automated cleaning system can continuously and effectively remove the dust accumulated on the dust filter 5, avoiding a decrease in cooling efficiency due to blockage, ensuring the efficient and high-precision operation of the system. By cleaning the dust filter 5 in a timely manner, the excessive dust reduces the impact on the air intake effect, helps extend the overall service life of the equipment, ensures the normal temperature inside the cooling unit, helps maintain the stability of the chiller unit, and avoids shutdowns due to overheating or other problems. The dust filter 5 does not require frequent manual disassembly and cleaning, reducing maintenance labor costs.
[0026] Preferably, in this embodiment, the driving device includes a fixed plate 10, a threaded rod 11, a nut 12, and a drive motor 13. Two sets of fixed plates 10 are symmetrically installed on the upper side wall of the screw chiller unit body 2 near the air inlet 4. The threaded rod 11 is rotatably installed between the two sets of fixed plates 10. One end of the threaded rod 11 passes through the side wall of the fixed plate 10 and is fitted with the drive motor 13. The nut 12 is threaded onto the threaded rod 11. The bottom wall of the nut 12 is fixedly connected to the top wall of the slider 7. When the control system issues a command to start the drive motor 13, the drive motor 13 begins to rotate. Since the drive motor 13 is directly connected to one end of the threaded rod 11, the threaded rod 11 will also rotate accordingly. With an internal thread matching the threaded rod 11, the nut 12 moves along the axial direction of the threaded rod 11 as the threaded rod 11 rotates. Because the bottom wall of the nut 12 is fixedly connected to the top wall of the slider 7, the slider 7 moves synchronously when the nut 12 moves. In order for the slider 7 to complete the reciprocating sliding, the drive motor 13 needs to be able to switch between forward and reverse rotation. This is controlled by the control system according to a preset program. For example, when the slider 7 reaches one end of the slide rail 6, the control system will make the drive motor 13 rotate in the opposite direction, so that the slider 7 moves back to the starting point or another designated position. Through the automated reciprocating motion mechanism, the system can continuously and effectively remove dust and other particles from the dustproof net 5 without manual intervention, which greatly improves cleaning efficiency and frequency.
[0027] Preferably, in this embodiment, the drive motor 13 is a servo motor. The servo motor is used in conjunction with the encoder to form a closed-loop control system. This means that the actual position, speed and other parameters of the motor can be monitored in real time and adjusted according to the feedback to ensure that the expected motion effect is achieved. The servo motor has excellent dynamic response characteristics and can accelerate from a stationary state to the required speed or decelerate to a stop in a very short time. This is beneficial to improving cleaning efficiency and reducing cycle time.
[0028] Preferably, in this embodiment, the collecting device includes a groove 14, a pipe 15, a suction frame 16, a vacuum cleaner 17, and a connecting pipe 18. The groove 14 is formed in the middle of the moving plate 8, and the pipe 15 is installed on the outer wall of the groove 14. The suction frame 16 is installed at one end of the pipe 15 near the dustproof net 5, and the vacuum cleaner 17 is installed on the top wall of one end of the base. The suction end of the vacuum cleaner 17 and the pipe 15 are connected through the connecting pipe 18. The control system starts the servo motor, drives the threaded rod 11 to rotate, and then causes the nut 12 to drive the slider 7 to move along the slide rail 6. The movement of the slider 7 causes the moving plate 8 installed on it to start to move linearly along the slide rail 6. As the moving plate 8 moves, the bristles 9 at the front end start to sweep the surface of the dustproof net 5, sweeping off the dust and particles attached to the dustproof net 5. When the moving plate 8 moves, the suction frame 16 on the pipe 15 runs close to the surface of the dustproof net 5 to ensure that the dust swept up by the bristles 9 can be effectively captured. The vacuum cleaner 17 installed on the top wall of one end of the base (1) is connected to the pipe 15 through the connecting pipe 18, forming a closed air circulation path. The vacuum cleaner 17 generates negative pressure, which causes the air around the suction frame 16, along with the dust, to be sucked into the pipe 15 and finally guided into the vacuum cleaner 17 for storage. The sucked dust and particles are collected in the dust bag inside the vacuum cleaner 17 for easy cleaning later. When the moving plate 8 completes the predetermined stroke, the control system will instruct the drive motor 13 to run in reverse, so that the moving plate 8 returns to its original position and prepares for the next round of cleaning operation. Through the synergistic effect of the brush bristles 9 and the suction frame 16, not only can the dust on the dustproof net 5 be effectively removed, but secondary dust can also be avoided, ensuring cleaning efficiency. Regular and effective cleaning helps to prevent the problem of poor heat dissipation caused by dust accumulation, thereby protecting the internal components of the chiller unit from overheating damage and extending the service life of the equipment. Keeping the dustproof net 5 clean can maintain the best working state of the chiller unit and ensure the accuracy of the overall system operation.
[0029] Preferably, in this embodiment, two sets of support plates 19 are symmetrically installed below one end of the screw chiller unit body 2 near the air inlet 4. A guide rod 20 is fixedly installed between the two sets of support plates 19. A guide block 21 is slidably installed on the guide rod 20. The guide block 21 is fixedly connected to the top wall of the moving plate 8. When the drive motor 13 drives the slider 7 to move along the slide rail 6 through the threaded rod 11 and nut 12, the moving plate 8 begins to move along the slide rail 6 because the slider 7 is connected to the moving plate 8. At the same time, the guide block 21 fixed at the bottom of the moving plate 8 also slides along the guide rod 20, providing additional support and guidance for the moving plate 8. During the entire movement process, the guide rod 20 and guide block 21 system helps maintain the horizontal position and straight path of the moving plate 8, preventing it from shifting or tilting due to external forces or unbalanced loads. By providing additional physical constraints, the guiding system helps reduce the slight vibration of the moving plate 8 in the lateral direction, thereby improving the positioning accuracy of the entire cleaning system, so that the brush bristles 9 can clean the dust screen 5 more accurately.
[0030] Preferably, in this embodiment, the bristles 9 are made of wear-resistant nylon filaments. Nylon material is known for its excellent wear resistance, which means that the bristles 9 made of wear-resistant nylon filaments can withstand long-term friction without easily wearing down, thereby extending the service life of the bristles 9.
[0031] Preferably, in this embodiment, both the slide rail 6 and the slider 7 are T-shaped designs. Since the T-shaped design provides a more stable support structure, it can ensure that the slider 7 moves accurately along a straight line, reduce any unnecessary lateral displacement, and improve the positioning accuracy of the overall system. The T-shaped cross-section allows for a larger contact area, which means that it can withstand greater vertical and lateral loads without affecting performance.
[0032] Preferably, in this embodiment, the cooling fan 3 is a high-efficiency centrifugal fan. The high-efficiency centrifugal fan has the function of automatically adjusting the speed, and automatically adjusts the operating speed according to the change of ambient temperature to achieve energy saving effect.
[0033] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0034] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-precision temperature-controlled screw chiller unit, comprising a base (1), a screw chiller unit body (2), a cooling fan (3), an air inlet (4), a dust filter (5), a drive device, and a collection device, characterized in that: The screw chiller unit body (2) is installed on the top wall of the base (1). Multiple sets of cooling fans (3) are installed on the top of the screw chiller unit body (2). An air inlet (4) is opened on one side wall of the screw chiller unit body (2). A dustproof net (5) is installed inside the air inlet (4). A slide rail (6) is installed on the upper side wall of the screw chiller unit body (2) near the air inlet (4). A slider (7) is slidably installed on the slide rail (6). A moving plate (8) is installed on the bottom wall of the slider (7). A brush (9) is installed on the end of the moving plate (8) near the dustproof net (5). The driving device is installed above the slide rail (6). The collecting device is installed on the side wall of the moving plate (8).
2. The high-precision temperature-controlled screw chiller unit according to claim 1, characterized in that: The driving device includes a fixed plate (10), a threaded rod (11), a nut (12), and a drive motor (13). Two sets of fixed plates (10) are symmetrically installed on the upper side wall of the screw chiller body (2) near the air inlet (4). The threaded rod (11) is rotatably installed between the two sets of fixed plates (10). The drive motor (13) is installed through the side wall of the fixed plate (10) at one end of the threaded rod (11). The nut (12) is threaded on the threaded rod (11). The bottom wall of the nut (12) is fixedly connected to the top wall of the slider (7).
3. A high-precision temperature-controlled screw chiller unit according to claim 2, characterized in that: The drive motor (13) is a servo motor.
4. A high-precision temperature-controlled screw chiller unit according to claim 1, characterized in that: The collection device includes a groove (14), a pipe (15), a suction frame (16), a vacuum cleaner (17), and a connecting pipe (18). The groove (14) is provided in the middle of the moving plate (8). The pipe (15) is installed on the outer wall of the groove (14). The suction frame (16) is installed at one end of the pipe (15) near the dustproof net (5). The vacuum cleaner (17) is installed on the top wall of one end of the base (1). The suction end of the vacuum cleaner (17) and the pipe (15) are connected through the connecting pipe (18).
5. A high-precision temperature-controlled screw chiller unit according to claim 1, characterized in that: Two sets of support plates (19) are symmetrically installed below one end of the screw chiller body (2) near the air inlet (4). A guide rod (20) is fixedly installed between the two sets of support plates (19). A guide block (21) is slidably installed on the guide rod (20). The guide block (21) is fixedly connected to the top wall of the moving plate (8).
6. A high-precision temperature-controlled screw chiller unit according to claim 1, characterized in that: The bristles (9) are made of abrasion-resistant nylon filaments.
7. A high-precision temperature-controlled screw chiller unit according to claim 1, characterized in that: Both the slide rail (6) and the slider (7) are T-shaped designs.
8. A high-precision temperature-controlled screw chiller unit according to claim 1, characterized in that: The cooling fan (3) is a high-efficiency centrifugal fan.