In plastic processing and recycling production lines, plastic shredders are core equipment for handling sprue materials and waste plastics. However, under long-term high-load operation, faults such as material jamming, excessive dust, and blade overheating occur frequently, which not only affect production efficiency but also may accelerate equipment wear. Mastering quick solutions to these faults can help enterprises reduce downtime and lower operation and maintenance costs. 1. Material Jamming: Identify Causes and Handle Precisely Material jamming is the most common fault of plastic shredders, mostly caused by improper feeding, inadequate equipment adaptability, or component aging. It needs to be solved in three steps: "inspection - handling - prevention":   Emergency Handling: Stop Feeding First, Then Dismantle   When material jamming is detected, immediately close the feed inlet and cut off the shredder's power supply (trigger the emergency stop button directly if available) to prevent motor burnout due to overload. After the equipment stops completely, open the machine cavity inspection door and clean the plastic residues stuck between the blades and the screen. If the residues are hard (such as solidified ABS sprue materials), use a dedicated crowbar to gently peel them off; do not strike the blades with brute force to avoid edge chipping. Root Cause Inspection: Confirm One by One from Feeding to Equipment   Feeding Issues: If the feeding speed is too fast (e.g., pouring too much at once during manual feeding) or the size of plastic blocks exceeds the equipment's rated feed port diameter (e.g., putting 10cm×10cm PP waste parts into a shredder only suitable for materials under 5cm), material accumulation and jamming are likely to occur. Adjust the feeding rhythm or cut large plastic blocks into suitable sizes in advance. Equipment Adaptability: Improper selection of screen mesh aperture can also cause jamming. For example, using a 2mm fine screen to shred tough PE materials will easily block the screen holes with crushed particles, preventing subsequent materials from being discharged and causing jamming. Replace the screen with a corresponding aperture according to the plastic material and particle requirements (e.g., 5-8mm screen is recommended for PE materials, and 3-5mm screen can be used for ABS materials). Component Aging: Severe blade wear (dull edges, gaps) or loose drive belts will reduce shredding efficiency, causing materials to accumulate and jam as they cannot be crushed in time. Regularly check the sharpness of the blades (it is recommended to grind them every 200 hours; replace them if wear exceeds 1mm) and adjust the belt tension (the belt should sink 1-2cm when pressed).   Preventive Measures: Establish Feeding Specifications   Formulate a "layered feeding" system: classify and process plastics of different hardness and sizes, such as shredding soft PE films and hard PC blocks separately; for p...

In high-load industrial scenarios such as chemical engineering, iron and steel production, and electronic manufacturing, the production process has extremely strict requirements for temperature control. Screw chillers are required to provide continuous and stable refrigeration capacity to ensure the smooth progress of production processes and product quality. Any interruption in refrigeration may lead to product scrapping, equipment damage, and even safety accidents. Therefore, how to ensure that screw chillers achieve continuous refrigeration under high-load working conditions has become a core concern for industrial enterprises. 1. Equipment Selection and Configuration Optimization (1) Matching Refrigeration Capacity Requirements In high-load industrial scenarios, refrigeration demand is large and fluctuates frequently. When selecting equipment, it is necessary to accurately calculate the refrigeration capacity. Based on factors such as the heat load of the production process and environmental heat dissipation, determine the rated refrigeration capacity of the screw chiller, and reserve a certain margin to cope with peak loads. For example, in the cooling of chemical reaction kettles, a large amount of heat is released during the reaction process, and there is a significant difference in heat load between the initial stage and the stable stage of the reaction. Therefore, it is necessary to select a screw chiller with a wide refrigeration capacity range and flexible adjustment capabilities. At the same time, consider the parallel operation scheme of multiple units: some units can be shut down during low-load periods, and all units can be put into operation during peak-load periods. This not only meets the refrigeration demand but also avoids long-term high-load operation of a single unit, thereby extending the service life of the equipment. (2) Selecting High-Efficiency Compressors The compressor is the core component of a screw chiller, and its performance directly determines the refrigeration capacity and stability of the chiller. Under high-load working conditions, priority should be given to compressors with high compression ratio, large displacement, and high efficiency. For instance, compressors with an asymmetric double-screw rotor design, combined with nanoscale surface coating technology, can reduce internal leakage and friction losses, increasing compression efficiency by 12-18%. Moreover, they can withstand higher pressure and adapt to high-load operation. Some high-end compressors also have an adaptive adjustment function: when the ambient temperature or load changes, they automatically adjust the compression ratio to maintain stable output of refrigeration capacity. (3) Strengthening the Heat Exchange System An efficient heat exchange system is crucial for ensuring continuous refrigeration. The condenser and evaporator should adopt high-efficiency heat transfer materials and advanced structural designs to improve heat exchange effic...

Both air cooled chillers and water cooled chillers are core industrial cooling systems, relying on the vapor compression cycle (as detailed in the earlier industrial chiller working principle guide) to remove heat. However, they differ significantly in heat dissipation methods, structure, performance, and application scenarios—critical factors for buyers to choose the right model. Below is a detailed comparison of their key differences. ​ 1. Core Difference: Heat Dissipation Method (Condenser Operation)​ The fundamental distinction lies in how the condenser (a key component in the refrigeration cycle) releases heat to the external environment—this directly shapes the chiller’s design and usage conditions.​ Air Cooled Chiller​ Heat Dissipation Medium: Uses ambient air as the cooling medium.​ Condenser Design: Equipped with an air-cooled condenser (finned coils + fans). After the compressor outputs high-temperature refrigerant vapor, the vapor flows through the condenser coils; fans blow ambient air over the fins, transferring heat from the refrigerant to the air, which is then discharged to the atmosphere.​ No Additional Water System: Does not require a separate water supply or circulation system for cooling, simplifying installation.​ Water Cooled Chiller​ Heat Dissipation Medium: Uses water (usually from a cooling tower or tap water) as the cooling medium.​ Condenser Design: Features a water-cooled condenser (shell-and-tube or plate heat exchanger). High-temperature refrigerant vapor enters the condenser, and cooling water flows through the exchanger’s tubes; heat is transferred from the refrigerant to the water, which then carries the heat away (e.g., to a cooling tower, where the water is cooled and recycled).​ Depends on Auxiliary Water Systems: Requires matching equipment like cooling towers, water pumps, and pipelines to circulate and cool the water—adding complexity to the overall system.​ 2. Structural & Installation Differences​ Air Cooled Chiller​ Structure: More compact, integrating the condenser, fans, and main unit into one system. No need for additional water tanks, pumps, or cooling towers.​ Installation Requirements:​ Needs sufficient open space (e.g., rooftops, outdoor yards) to ensure unobstructed air flow—blocked air intake will reduce heat dissipation efficiency.​ Requires minimal pipeline work (only for process fluid circulation, not cooling water).​ Shorter installation time (typically 1-2 weeks for small-to-medium models).​ Water Cooled Chiller​ Structure: The main unit (compressor, evaporator, condenser) is separate from auxiliary equipment (cooling tower, water pump, water treatment system), leading to a more scattered layout.​ Installation Requirements:​ Needs space for both the chiller unit and auxiliary water systems (cooling towers are often installed on rooftops, while pumps may be in machine rooms).​ Requires complex pipeline installation (for cooling water circulation, includ...

In modern industrial production and commercial applications, chillers, as key refrigeration equipment, are widely used in numerous industries such as pharmaceuticals, chemicals, electronics, food, and air conditioning systems. Air-cooled chillers and water-cooled chillers, as the two mainstream types in the chiller family, each play an important role in different application scenarios with their unique advantages and characteristics. Next, let's have an in-depth understanding of these two types of chillers.   Air-cooled Chillers: Convenient and Flexible Refrigeration Pioneers​​ Air-cooled chillers cool room-temperature water via a compressor to enhance cooling for molds or machines, comprising three key systems: refrigerant circulation (liquid refrigerant evaporates in the evaporator, is compressed, condenses in the condenser, and throttles back), water circulation (pump delivers water to equipment, which returns after absorbing heat), and electrical control (powers components and automates operation/protection). They feature easy installation (no cooling tower needed, compact and movable, ideal for water-scarce areas), stable performance (quality components, safety devices, low noise, long life, user-friendly interface), energy efficiency (some with multi-compressor systems adapting to loads), and strong adaptability (suitable for cooling various equipment like CNC machines and laser tools). However, they have lower COP (2.6-3.3), require good ventilation, and their cooling capacity drops in high-temperature workshops.​     Water-cooled Chillers: Efficient and Stable Refrigeration Mainstays​ Water-cooled industrial chillers, or water-cooled box-type units, use water as a heat exchange medium with a cooling tower. Their refrigerant circulation is similar to air-cooled ones, with cooling water dissipating heat via the tower. Structurally, they include a chilled water tank, pump, unit, cooling tower, and pipes, usable after connecting pipes and 380V power. They offer efficient refrigeration (higher energy efficiency by 300-500kcal/h than air-cooled due to water's properties), precise temperature control (5°C-35°C, suited for processes like plastic molding), stable operation (efficient heat exchangers, safety systems), and wide application (medical, food, chemical, etc.). But they need auxiliary equipment (larger footprint, complex installation), require good water quality to prevent scaling/blockages, and demand regular maintenance.​   In conclusion, air-cooled chillers and water-cooled chillers have their own advantages and disadvantages. In practical applications, users should comprehensively consider their specific needs, installation environment, operating costs and other factors to choose the most suitable type of chiller, so as to achieve efficient, stable and economical refrigeration effects. With the continuous progress and innovation of refrigeration technology, air-cooled chillers and water-cooled chillers will...

Industrial water chillers play a core role in air conditioning systems by providing a stable supply of low-temperature chilled water, supporting cooling for buildings or specific spaces. Here’s how they are applied and their underlying principles: I. Core Role in Air Conditioning Systems Industrial water chillers (such as scroll or screw types) generate low-temperature chilled water (typically 7–12°C) through a refrigeration cycle. This chilled water is pumped to terminal air conditioning equipment (e.g., fan coils, air handling units), where it exchanges heat with indoor air, absorbing heat to lower room temperatures and achieve cooling. ----------------------------- II. Integration with Air Conditioning Systems The integration of industrial water chillers with air conditioning systems is typically achieved through a "water system," following this process:   Chilled Water Production: In the chiller’s evaporator, refrigerant absorbs heat from the water, lowering its temperature to a set value (e.g., 7°C). Chilled Water Circulation: The low-temperature water is pumped to terminal air conditioning equipment (fan coils, air handling units, etc.). Terminal Heat Exchange: At the terminals, chilled water absorbs heat from warm indoor air, cooling the air while the water itself warms to around 12°C. Return Water Recooling: The warmed water flows back to the chiller’s evaporator, where it is recooled by the refrigerant, completing the cycle.     ----------------------------- III. Suitable Scenarios for Air Conditioning Industrial water chillers, valued for their high cooling capacity and stability, are ideal for medium-to-large air conditioning systems, including:   Commercial Buildings: Office towers, shopping malls, hotels, etc., requiring centralized cooling for large spaces. Public Facilities: Hospitals, stadiums, airports, where reliable air conditioning operation is critical. Industrial Plants: Workshops needing both process cooling and employee comfort (e.g., electronics or precision instrument workshops). Large Data Centers: Maintaining a constant ambient temperature (typically 20–25°C) for equipment and staff, with chillers serving both cooling needs. IV. Advantages Over Traditional Air Conditioners High Cooling Capacity for Large Areas: A single industrial chiller can deliver tens to hundreds of refrigeration tons, covering spaces over 10,000 square meters without needing multiple small units. Higher Energy Efficiency, Lower Operating Costs: Equipped with high-efficiency compressors (scroll, screw) and heat exchangers, combined with inverter control, they achieve a higher COP (Coefficient of Performance) at partial loads than conventional air conditioners. Centralized Control for Easy Management: A central control system regulates cooling output, water temperature, and pump operation, adjusting dynamically to indoor loads to reduce energy waste. Flexible Installation fo...

In the plastic recycling industry, the plastic shredder plays a pivotal role in breaking down plastic materials into smaller pieces for subsequent recycling processes. Making the right choice of a plastic shredder is crucial for ensuring efficient recycling operations. Here are some key aspects to consider when selecting a plastic shredder.​ Types of Plastic Shredders​ There are various types of plastic shredders designed for different plastics. For instance, the pet bottles shredder is specifically for processing PET bottles. The pp, pe, etc. plastic film crusher is suitable for plastic films made of polypropylene (PP) and polyethylene (PE). The hard plastic grinder is designed to handle hard plastic materials, and the styrofoam crushing machine is used for styrofoam.​ Based on the number of blade shafts, plastic shredders can be classified into single - shaft shredders, double - shaft shredders, and multi - shaft shredders. The multi - shaft shredder offers high output, making it ideal for large - scale production scenarios. In contrast, the single - shaft shredder is more flexible and is a good fit for manufacturers with lower output requirements. POWERFUL PLASTIC CRUSHER The powerful plastic shredder, with robust blades and high torque, efficiently crushes tough and thick plastic materials, ideal for heavy - duty recycling tasks. LOW NOISE SIDE SHREDDER The in - line slow shredder operates at a low speed, minimizing dust and noise, making it perfect for integrating with production lines to handle scrap plastics on - site. SHREDDER MACHINE The shredder, boasting strong cutting force, excels at breaking down thick plastics and metals into manageable pieces, serving as a reliable pre - processing tool. ----------------------------- Crushing Capacity​ The capacity of a plastic shredding machine is influenced by several factors. One of them is the inner chamber size. The size of the crusher is determined by the inner chamber. Generally, the width of the crusher's inner chamber ranges from 80 to 150 cm. A wider crusher usually means higher output.​ The speed of the crusher pulley also affects the capacity. The speed of the pulley on the crusher is calculated by multiplying the motor speed by the diameter of the small pulley next to it and then dividing by the diameter of the pulley on the crusher. Within the reasonable range of 400 to 800 rpm, a higher speed generally leads to higher output. However, if the speed is too low, the machine may jam, and if it is too high, the machine may vibrate.​ The design of screens and blades is another crucial factor. The size of the crushed material is controlled by the mesh size of the screen. For example, the mesh size of pet bottle flakes is usually adjusted to 16 - 18 mm, while that of pvc plastic steel is around 30 mm. Thicker blade thickness and a smaller gap between the blades are beneficial. For example, some efficient shredder blades are about 10 - 30 mm thick, and the gap is usually between 0.2 and 1 mm...

From plastic melting and molding to pharmaceutical cold-chain production, from electronic chip heat dissipation to auto parts die-casting, industrial chillers act as "invisible temperature guardians." By accurately controlling temperature, they ensure stable production processes and qualified product quality, becoming indispensable core auxiliary equipment on production lines across multiple industries. Due to the huge differences in production characteristics of different industries, chillers also need to be "customized" to meet the specific needs of each industry.   In the plastic processing industry, chillers are crucial for ensuring the molding quality of products. During injection molding, after plastic is melted and injected into the mold, excessively high mold temperature will cause slow cooling and uneven shrinkage of plastic parts, leading to defects such as deformation and flash. Conversely, excessively low temperature will reduce the fluidity of plastic, making it impossible to fill the mold cavity. At this time, industrial chillers cool the mold through circulating chilled water, controlling the mold temperature within the optimal range of 20-60℃. This ensures rapid and uniform cooling of plastic parts, reducing the defect rate. For example, when producing thin-walled plastic parts (such as mobile phone casings), chillers need to have rapid cooling capabilities to prevent warping caused by insufficient cooling of plastic parts. When producing thick-walled plastic parts (such as plastic barrels), chillers need to adjust the temperature slowly to avoid internal stress in the plastic parts. In extrusion molding (e.g., production of plastic pipes and films), chillers also cool the extruder barrel and die head to control the melting viscosity of plastic, ensuring extrusion speed and uniform product thickness.   The pharmaceutical industry has extremely strict requirements for the accuracy and stability of temperature control, and industrial chillers are one of the core equipment to meet GMP standards. During biopharmaceutical processes, microbial cultivation in fermentation tanks requires a stable temperature environment (usually 25-37℃). A temperature fluctuation exceeding ±0.5℃ may affect microbial activity, leading to fermentation failure. Industrial chillers achieve precise temperature control through PID (Proportional-Integral-Derivative) technology, controlling the temperature fluctuation of fermentation tanks within ±0.1℃ to ensure stable fermentation processes. In the pharmaceutical cold storage link, chillers provide cold sources for cold storage and cold-chain transportation equipment, ensuring that medicines are always within the safe temperature range of 2-8℃ during storage and transportation to prevent drug deterioration and failure. Additionally, the pharmaceutical industry has high requirements for equipment cleanliness. Chillers need to use stainless steel circulating pipelines to avoid pipeline rust...

Screw water - cooled chillers are indispensable equipment in various industries, from manufacturing to HVAC systems. Their efficient operation is crucial for maintaining production processes and ensuring comfortable indoor environments. Proper maintenance not only guarantees their optimal performance but also extends their service life, reduces energy consumption, and minimizes the risk of unexpected breakdowns. In this article, we will explore the key aspects of screw water - cooled chiller maintenance, covering essential steps, common issues, and best practices.   Regular maintenance of screw water - cooled chillers is not just a matter of keeping the equipment running; it directly impacts the overall efficiency and cost - effectiveness of your operations. A well - maintained chiller can operate at peak efficiency, reducing energy bills significantly. On the contrary, a neglected chiller may experience a decline in performance, leading to higher energy consumption and increased operational costs. Moreover, unexpected breakdowns can cause production halts, resulting in substantial financial losses. By adhering to a consistent maintenance schedule, you can identify and address potential problems early, avoiding costly repairs and downtime.   Essential Maintenance Steps for Screw Water - Cooled Chillers​ Checking and Maintaining the Cooling Water System​ The cooling water system is a critical component of the screw water - cooled chiller. Regularly check the water flow rate to ensure it meets the manufacturer's specifications. Inspect the water pump for any signs of leakage, unusual noise, or vibration. Clean the water filter regularly to prevent clogging, which can restrict water flow and reduce cooling efficiency. Additionally, monitor the water quality, including pH levels, hardness, and conductivity. Proper water treatment, such as adding chemicals to prevent scaling and corrosion, is essential to protect the system components.​ Inspecting and Servicing the Compressor​ The compressor is the heart of the screw water - cooled chiller. Regularly check the compressor's oil level, pressure, and temperature. Inspect for oil leaks and ensure the oil is clean and of the correct viscosity. Clean the compressor's suction and discharge valves to ensure proper operation. It is also important to check the compressor's electrical connections for tightness and signs of overheating.​ Cleaning the Condenser and Evaporator​ The condenser and evaporator are responsible for heat exchange in the chiller. Over time, they can accumulate dirt, scale, and other contaminants, reducing heat transfer efficiency. Regular cleaning is necessary to maintain their performance. For the condenser, depending on the type, you can use chemical cleaning or mechanical cleaning methods. For the evaporator, ensure that the refrigerant flow is uniform and clean the tubes if necessary.​ Examining the Electrical System​ The electrical system of the screw water - cooled chiller ...