Industrial Chiller

During winter, low ambient temperatures pose several challenges for chillers. Proper usage and maintenance are essential to ensure stable operation, extend the equipment's lifespan, and reduce operational costs. Hengde, a leader in the refrigeration equipment industry, has extensive experience in the research, production, and maintenance of chillers. Below are the key points and maintenance guidelines for industrial chiller use in winter, based on Hengde’s expert advice.   1. Pre-Startup Key Checks Water System Inspection Winter temperatures can cause water to freeze, so it’s crucial to thoroughly check both the cooling and chilled water systems. Ensure the water level is normal, and that the water is clear and free from impurities. If the water quality is poor, it should be treated or replaced. Additionally, inspect the water system's filters, clean or replace the filter elements to ensure smooth water flow and prevent ice blockages in the pipes.   Insulation measures inspection Check whether the insulation layer of each component of the industrial chiller is intact, especially the pipes and water tanks. If the insulation layer is damaged, the heat loss of the equipment will accelerate in a low temperature environment, energy consumption will increase, and the water system may also freeze. If damage is found, it is necessary to repair or replace the insulation material in time.   Electrical System Pre-Inspection Quickly check the electrical wiring for visible damage and ensure that terminal connections are secure. Verify that the power supply voltage is stable and within the chiller's rated voltage range. Hengde industrial chillers are equipped with an intelligent voltage monitoring system, but a manual inspection can help identify potential issues before they arise.   2. Operating Precautions Insulation measures inspection Check whether the insulation layer of each component of the chiller is intact, especially the pipes and water tanks. If the insulation layer is damaged, the heat loss of the equipment will accelerate in a low temperature environment, energy consumption will increase, and the water system may also freeze. If damage is found, it is necessary to repair or replace the insulation material in time.   Monitor Temperature Fluctuations In winter, the lower ambient temperature reduces the cooling load on the industrial chiller. It’s essential to closely monitor the temperatures of the evaporator, condenser, as well as the outlet temperatures of industrial chilled and cooling water. Based on these readings, adjust the operational parameters accordingly to prevent prolonged low-load operation, which can reduce compressor efficiency and increase energy consumption. Hengde industrial chillers feature an intelligent control system that automatically adjusts based on temperature fluctuations, ensuring efficient operation.   Insulation measures inspection Check whether the insulation layer of each component of the industrial chiller is intact, especially the pipes and water tanks. If the insulation layer is damaged, the heat loss of the equipment will accelerate in a low temperature environment, energy consumption will increase, and the water system may also freeze. If damage is found, it is necessary to repair or replace the insulation material in time.    Prevent Ice Formation In cold weather, the risk of water system freezing is higher. To prevent freezing, add an appropriate amount of antifreeze to the water, and ensure that the water system circulates properly. If any signs of freezing are detected, immediately shut down the system, thaw it, and restart it only after ensuring the water flow is restored.   Hengde not only offers high-performance industrial chillers but also provides comprehensive technical support and after-sales services. During winter operations, Hengde’s expert technical team is available to offer remote or on-site guidance, helping users solve any issues they may encounter. Hengde also conducts regular follow-up visits to check the equipment's operation, offering targeted maintenance suggestions to ensure the industrial water cooled chiller and air cooled chiller run efficiently and reliably throughout the winter.   Choose Hengde, Choose Perfect Industrial Chillers!

Chillers are essential in industrial, commercial, and laboratory applications, providing precise temperature control for processes, equipment, and cooling systems. However, even high quality industrial chillers can experience faults over time. Knowing the common chiller faults, their causes, and effective troubleshooting techniques can help operators minimize downtime, improve efficiency, and extend equipment lifespan.   Below is a practical guide for operators, maintenance teams, and facility managers on industrial chiller troubleshooting. Frequently Asked Questions on Industrial Chiller Troubleshooting Q1: My industrial chiller powers on but does not start. What could be the cause? A: This can happen due to micro-break trips, main power switch tripping, or reverse phase protection activation. To troubleshoot: Check and confirm the fault, replace or repair faulty components. Inspect the main power switch: if the line is grounded or short-circuited, repair or replace the affected parts. Verify the compressor, water pump, and motor; repair or replace if grounded. For reverse phase protection, ensure the compressor, water pump, and fan rotate in the correct direction; swap any two phases if needed. Measure the three-phase voltage with a multimeter to confirm.   Q2: Why does my industrial chiller trigger a high-pressure alarm? A: High-pressure alarms can occur due to several reasons: Dirty condenser or high ambient temperature: Keep air temperature below 40℃ and cooling water below 35℃; clean the condenser regularly. High-voltage switch fault: Press the reset switch after confirming safety. Overfilled refrigerant: Check and adjust the refrigerant charge. Cooling water pump failure or water system fault: Repair or replace the water pump.   Q3: What causes a low-pressure alarm on my industrial chiller? A: Common causes include: Insufficient refrigerant or system leaks: Inspect pipelines, repair any leaks, and refill refrigerant if necessary. Low water flow or insufficient water causing evaporator freezing: Ensure the water tank is full and valves are open; if frozen, melt ice with warm water—never hit the ice. Chilled water pump failure or pipeline blockage: Check and repair the pump and pipelines.   Q4: What triggers an overload alarm? A: Overload alarms may result from: Abnormal voltage:  Inspect and stabilize the three-phase power supply. Faulty water pump or compressor: Repair or replace. Overload relay set too low or damaged: Adjust or replace. Poor or loose line contacts: Tighten screws and ensure proper electrical connections.   Q5: Why does my industrial chiller display a water flow alarm? A: Possible reasons include: Air trapped in the water pump, preventing drainage or pump damage: Drain or replace the pump. Clogged water filter:  Clean the filter. Water shortage or damaged pipelines: Inspect and repair the system.   Q6: My industrial chiller output temperature is too low. What should I do? A: Causes may include: Water temperature setting is too low: Reset to the desired value. Water temperature probe is open or short-circuited: Inspect and replace if necessary.   Q7: The industrial chiller cooling seems weak. Why? A: This may happen if the cooling load is too small or the system refrigerant is insufficient or faulty:  Consider selecting a chiller with appropriate capacity and inspect the refrigerant system. Quick Reference: Industrial Chiller Troubleshooting Table Status / Fault Possible Causes Solutions Power ON, no startup Micro-break trip Check and confirm the fault, replace or repair Main power switch tripped 1) The power load line is grounded or short-circuited; 1) Replace new parts; 2) The compressor, water pump, or motor is grounded. 2) Repair or replace if fault is confirmed after inspection. Reverse phase protection 1) The compressor, water pump and fan are in reverse direction; 1) Swap any two phases of the power supply; 2) Phase loss. 2) Use a multimeter to measure whether the three-phase voltage is normal. High pressure alarm 1) High-voltage switch tripped. 1) Clean the condenser, keep the air temperature below 40℃/cooling water below 35℃; 2) High-voltage switch fault. 2) Press the high pressure reset switch to restart the compressor. 3) Overfilling of refrigerant. 3) Check whether the refrigerant charge is too much. 4) Cooling water pump fault or cooling water system fault. 4) Repair or replace the water pump. Low pressure alarm 1) Insufficient refrigerant or system leakage; 1) Check if the system is short of refrigerant or if there are leaks in the system pipelines, check for leaks and repair them; 2) Insufficient water flow or lack of water in the system causes the evaporator to freeze. 2) Check if the water tank is short of water and if the valve is open to the maximum. If the evaporator is frozen, drain the water and add warm water to melt the ice. Do not hit the ice with hard objects. If the copper pipe is penetrated, the compressor will be damaged! 3) Failure of the chilled water pump or pipe blockage. 3) Check the chilled water pump and pipeline system. Overload alarm 1) Abnormal voltage; 1) Check and repair the unstable voltage and missing phase of the three-phase power supply; 2) Faulty water pump or compressor; 2) Repair or replace; 3) Overload relay setting is too low or damaged; 3) Re-adjust the current value or replace; 4) Line contacts are poor or loose. 4) Re-tighten the screws. Water flow alarm 1) There is air in the water pump and it does not drain water or it is damaged; 1) Drain or replace the water pump; 2) The water system filter is clogged. 2) Clean the water filter; 3) The system is short of water or the pipeline is damaged. 3) Check and repair. Output temp too low 1) The water temperature setting value is too low; 1) Reset the temperature value; 2) The water temperature probe is open or short-circuited 2) Check the probe and replace it. Cooling weak 1) The cooling load of the unit is too small; 1) Reselect a chiller with appropriate capacity; 2) The system refrigerant is insufficient or faulty. 2) Check the system and repair it.   Note: For safety and optimal performance, industrial chiller maintenance and repairs should always be performed by qualified professionals. Regular industrial chiller inspections and preventive servicing reduce risks of faults and extend system life. For more industrial chiller maintenance methods, please refer to: How To Maintenance The Industrial Chiller   About NANJING HENGDE ELECTRICAL EQUIPMENT CO., LTD NANJING HENGDE ELECTRICAL EQUIPMENT CO., LTD is a trusted professional in the Industrial Chiller field, specializing in designing and manufacturing high-quality chillers for various industrial applications. With over 20 years of experience, Hengde provides reliable temperature control solutions, including water chillers, air chillers , mold temperature machines, and customized systems to meet the needs of factories worldwide. Their expertise ensures efficient, durable, and safe operation for all industrial cooling requirements.

Air cooled chillers are widely used in industrial cooling applications due to their simplicity, compact design, and ease of installation. However, many engineers and facility managers wonder: can an air cooled chiller maintain efficient performance in high-temperature regions? In this article, we explore the capabilities, challenges, and best practices for air cooled chillers operating in hot climates.   Challenges for Air Cooled Chillers in High-Temperature Regions Air cooled chillers rely on ambient air to reject heat from the refrigerant. When the surrounding temperature rises significantly, several issues can arise: Reduced Cooling Capacity High ambient temperatures limit the temperature difference available for heat transfer, causing the chiller to operate less efficiently. This may lead to longer cooling cycles or failure to meet target setpoints. Increased Energy Consumption Compressors work harder to maintain chilled water temperatures, which increases electricity usage and operating costs. Higher Condenser Pressure Elevated temperatures result in higher condenser pressures, increasing mechanical stress on the compressor and other components. Potential for System Overload In extreme conditions, chillers may trip safety devices to prevent damage, leading to unplanned downtime.   Best Practices to Optimize Air Cooled Chiller Performance in Hot Climates Despite these challenges, air cooled chillers can perform well in high-temperature regions when certain strategies are applied: 1. Proper Sizing and Selection Ensure the chiller is designed for ambient conditions higher than the expected peak temperature. Oversizing slightly can prevent capacity loss. 2. Regular Maintenance Keep the condenser fins clean and free from debris. Dust and dirt reduce airflow, exacerbating performance drops in hot weather. 3. Optimal Placement Install chillers in shaded or ventilated areas to minimize direct solar heat gain. Elevating units can improve airflow. 4. Enhanced Airflow Solutions Consider auxiliary fans or louvers to improve heat rejection in extreme conditions. 5. Intelligent Controls Modern chillers can leverage adaptive control systems or AI-based monitoring to adjust compressor and fan speeds dynamically, optimizing energy efficiency and performance.   Key FAQs for Air Cooled Chillers in High-Temperature Environments Q1: How does ambient temperature affect energy consumption? Higher ambient temperatures increase compressor workload, leading to higher electricity usage.   Q2: Are water cooled chillers better for hot regions? Water cooled chillers are often more efficient in high-temperature environments, but air cooled chillers are simpler, easier to install, and require less water.   Q3: How often should maintenance be performed in hot climates? Condenser cleaning and inspection every 1–2 months are recommended, with a full preventive maintenance check at least twice a year.   Q4: Is it safe to operate air cooled chillers continuously in hot regions? Yes, with proper sizing, preventive maintenance, and intelligent controls, continuous operation is feasible.   Q5: Can AI or smart monitoring help? Yes. Predictive algorithms can detect early performance drops, optimize fan and compressor speeds, and alert operators before failures occur.   Q6: Can shaded installation improve performance? Yes. Installing chillers in shaded or ventilated areas reduces heat load and helps maintain efficiency.   Ensuring Reliable Chiller Performance in Hot Climates Air cooled chillers can operate effectively in high-temperature regions when units are correctly sized, regularly maintained, and equipped with modern control technologies. Strategic placement, optimal airflow, and preventive maintenance are crucial to maintaining reliable cooling performance, energy efficiency, and system longevity.   Nanjing Hengde is a professional manufacturer of Industrial Chillers, including Water Cooled Chillers and Air Cooled Chillers, delivering reliable cooling solutions for a wide range of industries. Hengde industrial chillers are engineered for energy efficiency, stability, and long-term operation, helping manufacturers maintain consistent cooling even in extreme environmental conditions. Hengde also has extensive experience deploying chillers in high-temperature regions such as Saudi Arabia, UAE, Qatar, Kuwait, and Oman, ensuring reliable performance under harsh climatic conditions.   Choose Hengde, Choose Perfect Air Cooled Chiller!  

Industrial chillers are a backbone of modern manufacturing, supporting processes from plastics molding to laser cutting and electroplating. A sudden chiller failure can halt production, affect product quality, and incur costly repairs. Fortunately, most issues provide early warning signs—if you know what to look for.   Leveraging both industry experience and smart monitoring technology, manufacturers can prevent unexpected downtime and optimize the lifespan of their Chiller systems. Below are five critical signs your system needs immediate attention. 1. Unstable Cooling Performance or Temperature Fluctuations If your Water Cooled Chiller or Air Cooled Chiller cannot maintain a stable outlet temperature, this is an early warning. Common causes include: Fouled heat exchangers Insufficient refrigerant levels Sensor drift Restricted flow in the cooling loop Case Insight (Nanjing Hengde): Our technicians have observed that small fouling in water chillers used for injection molding can increase cycle time by 5–10% if not addressed. Proactive cleaning restores stability and prevents quality defects. Pro Tip: Integrating smart sensors or IoT-enabled monitoring can alert you to minor fluctuations before they impact production.   2. Unusual Noise or Vibration Abnormal noise or vibration often indicates mechanical issues: Worn pump or compressor bearings Misaligned shaft or impellers Cavitation from restricted water or oil flow Ignoring this can escalate into full component failure. Regular inspection, combined with vibration sensors or predictive analytics, can prevent costly downtime.   3. Rising Energy Consumption Without Increased Output A sudden increase in energy usage often signals inefficiency. Causes can include: Dirty condensers or evaporators Scaling inside heat exchangers Aging compressors or fans Tip from Hengde Service Data: Water chillers older than 5 years in continuous operation often show a 15–20% drop in energy efficiency without proper preventive maintenance.   4. Frequent Alarms or Safety Shutdowns Modern chillers are equipped with alarms for high/low pressure, flow failures, and overtemperature. Repeated alarms indicate underlying problems: Alarm Type Common Causes Recommended Action High pressure Condenser fouling, blocked airflow Clean condenser, check airflow Low flow Pump malfunction, clogged piping Inspect pumps and piping Overtemperature Refrigerant leak, sensor fault  Check refrigerant, verify sensor readings   AI Integration Insight: Predictive analytics can learn alarm patterns and recommend maintenance schedules, reducing unnecessary shutdowns.   5. Visible Leaks, Corrosion, or Poor Water Quality Regular visual inspection is critical. Key signs include: Water or oil leaks around connections Corrosion on piping and fittings Contaminated circulating water These issues degrade heat transfer, reduce efficiency, and can lead to major breakdowns if ignored. A scheduled inspection checklist ensures nothing is missed.   Hengde Best Practice: Our team recommends quarterly inspections for industrial chillers operating in high-load conditions. Combined with water treatment, this approach minimizes downtime and extends equipment life.   Industrial Chiller Preventive Maintenance Checklist (Sample) Checkpoint Frequency Notes Outlet temperature stability Daily Record fluctuations >±1°C Noise & vibration Weekly Listen for unusual sounds Energy consumption Monthly Compare to baseline Alarms & safety trips Continuous Log and analyze patterns Water/oil quality & leaks Quarterly Inspect piping, treat water/oil Heat exchanger & condenser cleaning Semi-annually Remove fouling and debris This table can be printed and used as a guide for maintenance teams.   Why Early Maintenance Matters Addressing warning signs early reduces downtime, prevents product quality issues, and extends chiller lifespan. Combining preventive maintenance with smart monitoring and predictive analytics further optimizes: Energy efficiency Cycle time consistency Component longevity For more on intelligent temperature management, see our “ Leveraging AI for Precision in Mold Temperature Controller Performance ” article—smart technology is transforming industrial cooling just as it does in mold temperature control. About Nanjing Hengde Nanjing Hengde is a professional manufacturer of Industrial Chillers, with decades of experience serving injection molding, electroplating, and industrial manufacturing sectors. Our industrial chillers are engineered for reliability, energy efficiency, and long-term operation. Hengde provides full technical support, tailored solutions, and preventive maintenance guidance to ensure your cooling systems run safely and efficiently.   Whether you are planning a new chiller system or maintaining an existing one, Hengde helps you avoid downtime, optimize cooling performance, and safeguard production quality.

The water cooled screw chiller is a crucial piece of equipment in industries with strict cooling requirements, such as industrial production and commercial buildings. It combines advanced refrigeration technology with efficient heat exchange systems, offering a range of unique advantages. Hengde's water cooled screw chiller has become a benchmark for quality in the industry.   1. Efficient and Stable Compressor Performance Hengde’s water-cooled screw chiller uses imported semi-hermetic twin-screw compressors, which offer significant advantages over traditional reciprocating compressors. These screw compressors provide efficient compression, quickly and steadily compressing refrigerant gas to provide powerful cooling. During operation, the compressor runs quietly, significantly reducing noise pollution in the workplace. The simple operation minimizes technical requirements and workload for operators. Additionally, the internal structure is designed for minimal wear on moving parts, ensuring a long service life and reducing maintenance and replacement costs, thus offering reliable long-term cooling performance.   2. High-Quality and Reliable Refrigeration Valves Hengde’s water-cooled screw chillers use refrigeration valves from renowned brands such as Emerson (USA), Danfoss (Denmark), and Carel (Italy). These high-quality valves are known for their excellent performance and durability. They provide precise flow control and pressure regulation, ensuring efficient and stable refrigerant circulation within the system. The accuracy of these valves not only ensures stable cooling performance but also optimizes energy usage, contributing to energy-saving, efficient operation. Additionally, the reliability of these components reduces the risk of downtime due to valve failures, ensuring continuous system operation.   3. Efficient Heat Exchange System The evaporator and condenser of Hengde’s water cooled screw chiller are equipped with the latest high-efficiency spiral heat exchange copper tubes, which have a high heat transfer coefficient. In the evaporator, these copper tubes quickly absorb heat from the cooled medium, causing the refrigerant to evaporate rapidly, achieving efficient cooling. In the condenser, they efficiently transfer heat from the refrigerant to the cooling water, speeding up the condensation process. This high-efficiency heat exchange ensures superior cooling performance, allowing Hengde’s water cooled screw chiller to handle larger heat loads within a shorter time, making it suitable for various scale refrigeration requirements.   4. Advanced and Intelligent Control System Hengde’s water cooled screw chiller adopts an imported microcomputer control system, with an optional Siemens PLC control system. The advanced control system continuously monitors critical parameters such as temperature, pressure, and flow rate, adjusting the operation mode based on real-time needs. By using precise control algorithms, the system can coordinate the operation of compressors, water pumps, cooling towers, and other components, ensuring the chiller operates at peak performance. An optional RS485 communication function allows the unit to be integrated into an automation management system for remote monitoring, fault alarms, and data analysis, improving operational efficiency and convenience.   5. Independent and Convenient Refrigeration Circuits The water cooled screw chiller features independent refrigeration circuits, meaning each circuit can be maintained and serviced separately without affecting the overall operation. If one circuit fails, the other circuits will continue to function, ensuring uninterrupted cooling. This design greatly enhances the maintainability and flexibility of the equipment, reduces maintenance costs and downtime, and minimizes the impact on production.   6. Comprehensive Safety Protections and Energy-Efficient Operation The chiller is equipped with multiple safety protection features, including thermal protection, power protection, water flow protection, antifreeze protection, high-pressure protection, low-pressure protection, overload protection, phase loss protection, and voltage protection. All fault alerts are displayed in both English and Chinese on the operation screen for easy identification and troubleshooting. These protections prevent damage to the chiller in harsh operating conditions, ensuring safe operation and extending the unit’s lifespan. Additionally, through intelligent control and optimized design, the chiller operates at maximum efficiency with minimal energy consumption, providing a reliable and energy-saving solution that helps users reduce operational costs.   7. High-Quality Electrical Components and Protective Design The chiller uses high-quality electrical components from international brands such as Siemens, Schneider, and LS, which are known for their stability and reliability. The control panel is rated at IPX22 for protection against dust and water droplets, and higher protection ratings are available to suit more demanding environments. This protective design ensures that the chiller operates safely and reliably in complex working conditions, safeguarding the internal electrical components from potential damage.   The water cooled screw chiller, with its efficient cooling performance, stable operation, easy maintenance, and advanced control technology, is an ideal choice for industrial and commercial refrigeration needs. Hengde’s water cooled screw chiller excels in key components selection, system design, and safety features, providing users with high-quality, reliable, and energy-efficient cooling solutions. Its reputation for quality and performance has earned it widespread recognition in the market.   Choose Hengde, Choose Perfect Industrial Chillers!

The air cooled screw chiller, a critical component in the refrigeration industry, stands out for its unique design and advanced technology. The air cooled screw chiller offers significant advantages in industrial production and commercial sectors. Below are the key features of the air-cooled screw chiller.   1. High-Efficiency Cooling Equipped with a screw compressor, the air cooled screw chiller uses a rotor structure that enables the refrigerant gas to be compressed efficiently and smoothly. It has a large compression ratio and a broad range of cooling capacity, making it suitable for medium to large-scale cooling needs. The screw chiller can quickly and steadily provide low-temperature cooling, meeting the requirements of various processes and spaces. Hengde has optimized the design of its screw compressors, choosing imported semi-hermetic twin-screw compressors. Compared to traditional rotary compressors, these offer high efficiency, quiet operation, simple operation, and long service life.    2. Air-Cooled Heat Exchange, No Water Source Required Unlike water cooled screw chillers, air cooled screw chillers use air as the heat exchange medium. A fan drives the airflow through the condenser, enabling the refrigerant to exchange heat with the external air. This feature eliminates the need for a complex cooling water system, making installation and use more convenient, especially in areas where water is scarce or where it is difficult to install water cooling pipes, such as remote industrial plants or commercial buildings in water-deficient regions. Hengde has innovated the design of the air ducts, employing high-efficiency, low-noise fans and optimized heat exchange fins, ensuring effective heat dissipation while reducing noise, thus providing users with a quieter and more comfortable environment.   3. Easy Installation With a compact overall structure and small footprint, the air-cooled screw chiller doesn’t require specialized cooling towers, water pumps, or water piping systems. Once the unit arrives at the site, it only needs simple positioning and electrical connections before being quickly put into operation. This greatly reduces installation time, costs, and engineering complexity. Hengde’s air-cooled screw chillers undergo strict pre-commissioning before leaving the factory to ensure the reliability and stability of all components. The company also provides detailed installation manuals and professional technical support, making it easy even for first-time users to install and start the unit.   4. Stable and Reliable Operation The unit uses internationally renowned refrigeration components to ensure quality and operational stability. The evaporator and condenser are made with the latest high-efficiency spiral heat exchange copper tubes, which have a high heat transfer coefficient, ensuring excellent cooling performance. The air-cooled chiller is controlled by a microcomputer programmable controller, and its compressor features a multi-stage energy adjustment system that precisely controls the matching of cooling capacity and load in real-time.   5. Convenient Maintenance The components of the air-cooled screw chiller are logically arranged, making them easy for maintenance personnel to access and operate. Major components, such as the compressor, condenser, and evaporator, have independent service spaces, making routine inspections, cleaning, and maintenance easier. Additionally, the intelligent control system can send fault alerts, helping maintenance personnel quickly identify and resolve issues, reducing maintenance difficulty and costs. Hengde's screw chillers feature independent refrigeration circuits that can be maintained and repaired separately without affecting the operation of the entire unit. The professional after-sales service team is always ready to respond to maintenance needs, ensuring the unit operates at its best.   6. Energy-Efficient and Environmentally Friendly With continuous technological advancements, modern air-cooled screw chillers incorporate high-efficiency heat exchangers and energy-saving compressors, improving energy utilization and reducing energy consumption. Their air-cooled heat exchange system also avoids environmental pollution caused by cooling water discharge, aligning with current trends in energy conservation and environmental protection. Hengde actively responds to national energy-saving and environmental protection policies by exploring and applying new energy-efficient materials and technologies during product development. As a result, Hengde’s air-cooled screw chillers achieve industry-leading energy efficiency, helping customers reduce operational costs while contributing positively to environmental conservation.   With features such as high-efficiency cooling, easy installation, stable operation, convenient maintenance, and energy efficiency, the air-cooled screw chiller is an ideal choice for refrigeration needs across various industries. Hengde, known for its technological innovation, product quality, and exceptional after-sales service, has become a trusted choice for customers when selecting air-cooled screw chillers. The company provides reliable cooling solutions that support production and everyday life across diverse sectors.   Choose Hengde, Choose Perfect Air Cooled Screw Chillers!

Water cooled chillers are essential equipment in the refrigeration industry, widely used in industrial production and commercial buildings. Water chillers are primarily composed of a compressor, condenser, evaporator, and expansion valve, working together in a refrigeration cycle to transfer heat and achieve cooling effects. In industrial production, water-cooled chillers precisely control process temperatures; in commercial buildings, they create a comfortable indoor environment.   However, the stable operation of a water-cooled chiller is closely related to water quality. Proper water quality is crucial for its efficient operation and extended lifespan. 1. pH Level The ideal pH range for water is between 6.5 and 8.5. Water with a pH below 6.5 is acidic and can corrode the chiller’s metal components. Water with a pH above 8.5 is alkaline and can lead to scaling, which affects the chiller's performance.   2. Water Hardness Water hardness is another critical factor. The total hardness should not exceed 200mg/L (calculated as calcium carbonate). High hardness levels can lead to the formation of scale, reducing cooling efficiency, increasing energy consumption, and even causing blockages in the pipes.   3. Turbidity Turbidity should be kept below 5 NTU. Higher turbidity can cause suspended particles to wear down equipment, clog filters, and reduce heat exchange efficiency.   4. Microorganisms Microbial content must also be carefully monitored. Excessive microbial growth can result in biological slime buildup, which corrodes equipment, decreases heat exchange efficiency, and causes blockages in pipes.   High quality water is crucial for the optimal performance of a water cooled chiller. Hengde, with its extensive experience in refrigeration equipment development and production, offers water cooled chillers that not only deliver excellent cooling performance but also consider water quality compatibility. We provide comprehensive water quality treatment advice and equipment maintenance plans, helping industries meet their cooling needs efficiently and reliably. Hengde has earned a strong reputation in the refrigeration market for its high-quality products and services.   Choose Hengde, Choose Perfect Chillers!

In the daily operation and maintenance of industrial chillers, various issues may arise. One common problem is excessive refrigerant charge, which not only affects the efficiency of the industrial chiller but can also lead to equipment malfunctions, increased energy consumption, and higher maintenance costs. So, what should be done when it is determined that a industrial chiller has been overcharged with refrigerant? In this article, we’ll provide a detailed guide on how to handle this issue properly.   Step 1: Confirm the Excess Refrigerant To determine if the industrial chiller has an excessive amount of refrigerant, use a pressure gauge to check the high and low pressures. Once confirmed, turn off the industrial chiller’s power to ensure safe operation and prevent any accidental restarts during the process.   Step 2: Wear Protective Equipment Before starting, make sure to wear protective gloves, goggles, and other safety gear to avoid refrigerant contact with your skin and eyes. Additionally, inspect the surrounding area for any potential fire hazards and ensure good ventilation in the operating environment.   Step 3: Release the Excess Refrigerant To safely release the refrigerant, specialized tools and techniques are required. For example, using recovery equipment, you can transfer the excess refrigerant into a storage container. During the refrigerant release process, it’s crucial to follow environmental regulations to avoid releasing refrigerants directly into the atmosphere, which could contribute to environmental pollution. Also, monitor system parameters such as pressure and temperature to determine when the refrigerant charge reaches the correct level. When the system pressure is within the normal operating range, it indicates that the refrigerant has been properly adjusted, and you can stop the recovery process.   Step 4: Restart the Chiller and Monitor Performance Once the refrigerant has been properly released, restart the chiller and observe key operational parameters, such as pressure, temperature, and current. This ensures that the chiller is running smoothly. Additionally, verify that the cooling effect meets the desired performance standards. If any issues arise, shut down the chiller immediately and perform further inspections and troubleshooting.   Important Notes on Refrigerant Handling It’s essential to note that handling and adjusting refrigerant levels should only be performed by qualified technicians to ensure safety and accuracy. During routine maintenance or repairs, always adhere to the chiller’s technical specifications and requirements for refrigerant charging to avoid overcharging or undercharging.   By following these detailed steps and precautions, you can effectively resolve the issue of excess refrigerant in water cooled chiller and air cooled chiller, allowing your equipment to return to stable and reliable operation. This ensures that your cooling system continues to provide dependable cooling support for production and daily activities.   About Hengde Company As a leading enterprise in the industry, Hengde has been dedicated to the refrigeration equipment field for many years. We have extensive technical experience and a professional R&D and after-sales team. Hengde is committed to providing high-quality cooling solutions and comprehensive technical support to our clients worldwide. Choose Hengde, Choose Perfect Chillers!

In the electroplating and surface finishing industry, maintaining a consistent solution temperature is critical to achieving high-quality coating results. Whether you're operating a zinc plating line, acid copper plating, or anodizing process, investing in the right chiller for electroplating is essential for performance and product consistency.   Why Temperature Control Matters in Electroplating? During electroplating, the chemical reactions between the metal ions and the substrate generate significant heat. Without an efficient electroplating water chiller, bath temperatures can quickly exceed the optimal range, leading to: Poor coating adhesion Irregular plating thickness Excessive chemical consumption Shortened bath lifespan   A properly selected chiller electroplating system ensures your plating solutions stay within the desired temperature range—reducing downtime and waste, and increasing coating quality.   What Makes a Good Electroplating Chiller? When choosing a Chiller for Electroplating Industry use, here are key features to consider: 1. Anti-Corrosion Materials Since plating baths involve corrosive chemicals, the evaporator in the chiller must be made from stainless steel or titanium tubes to resist corrosion and maintain long-term stability—especially in Zinc Plating Chillers and Acid Copper Plating Chillers. 2. Stable Cooling Precision The electroplating chiller must deliver consistent cooling even under variable production loads, avoiding temperature fluctuations that affect coating thickness. 3. Customized Refrigerant Options For clients in environmentally regulated regions, like Europe, Electroplating Chiller Manufacturers like HENGDE offer eco-friendly refrigerants such as R-407C or R-513A. Systems can also be tailored based on local compliance and technical standards. 4. Experience in the Industry A reliable Chiller for Electroplating should come from a manufacturer with deep expertise. HENGDE has delivered numerous Plating Anodizing Chillers and has supported clients across Europe, Asia, and North America with tailored cooling systems for chrome, nickel, copper, and aluminum plating.   Air Cooled or Water Cooled Chillers — Which Is Right for Your Electroplating Workshop? When it comes to choosing a Chiller for Electroplating, both air cooled Chillers and water cooled chillers are widely used—but which one suits your facility best?   For workshops with limited water access, simpler installation requirements, or those located in areas with strict water usage regulations, air cooled electroplating chillers are often the better choice. They don’t require cooling towers or additional water circulation systems, making them ideal for facilities that prioritize convenience and lower maintenance.   On the other hand, water cooled chillers for electroplating are typically more energy-efficient and stable in environments where ambient temperatures fluctuate greatly or where high-capacity cooling is needed continuously. However, they do require a reliable water source and more complex setup.   If you're running Zinc Plating Chiller systems, Acid Copper Plating Chillers, or Anodizing Chillers, your ideal chiller type depends on factors like workshop layout, cooling capacity needs, local utility costs, and environmental compliance.   Not sure which one to choose? As an experienced Electroplating Chiller Manufacturer, HENGDE offers both air and water cooled options, and we’re here to help you select the most cost-effective and efficient cooling system for your plating operation. Certainly, you can also check our this blog：Electroplating Water Cooled Chiller Or Electroplating Air Cooled Chillers? Electroplating Chillers Electroplating Water Cooled Chiller Electroplating Air Cooled Chiller   Typical Applications of Electroplating Chillers HENGDE's range of electroplating chillers has been widely used in various surface treatment processes, including: Zinc plating (acid and alkaline baths) Nickel and chrome plating Acid copper electroplating Anodizing and hard anodizing Electrophoretic and vacuum coating   Whether you're running a Water Chiller for electroplating in a hardware finishing line or operating a Chiller for Electroplating Coating Industry, temperature stability remains the key to consistent product quality.   Ready to enhance your plating line with a high-performance cooling system? Contact HENGDE today to explore our full range of chillers for electroplating, including electroplating water chillers, anodizing chillers, and custom-built plating chillers for your application.   Choose Hengde, Choose Perfect Electroplating Chiller!

As a leader in the refrigeration equipment industry, Hengde has leveraged its extensive technical expertise and innovative R&D capabilities to provide efficient and reliable industrial chiller solutions across a range of industries. Among these, application in the plastics industry stands out. In the complex and temperature-sensitive production processes of plastic manufacturing, industrial chillers play an indispensable role and have become key equipment for improving product quality and production efficiency.     1. Plastic Molding Mold Cooling In the plastic molding process, the cooling phase of the molds has a significant impact on both product quality and production efficiency. Hengde chillers come into play by precisely controlling mold temperatures. With efficient heat exchange mechanisms, the chillers quickly remove heat from the molds, accelerating the plastic curing process. This not only significantly reduces cooling time, allowing for faster mold release, but also greatly improves production efficiency. Furthermore, Hengde chillers ensure even distribution of mold temperature, preventing surface defects such as flow marks or stress concentration caused by uneven cooling. This results in enhanced product appearance, dimensional accuracy, and prevents deformation and shrinkage during cooling, ensuring products remain stable and meet high-precision manufacturing standards.   2. Plastic Processing Machinery Injection Molding Machine: Injection molding machines are crucial in plastic production. Hengde chillers are specifically designed for injection molding machines, providing vital support for ensuring high-quality injection molding operations. During the injection process, the chiller machine works in tandem with the injection machine to continuously cool the mold, ensuring even heat dissipation of the plastic product. This guarantees high-quality production and meets the high-precision requirements of complex injection-molded products.   Extrusion Molding Machine: For extrusion molding machines, Hengde chillers provide effective cooling for the extruder and mold, precisely controlling processing temperatures. This ensures dimensional stability of the extruded products and eliminates size deviations caused by temperature fluctuations. Additionally, it improves surface finish, resulting in smoother, higher-quality plastic products that meet premium product standards.   Blow Molding Machine: For blow molding and thermoforming equipment, Hengde chillers provide stable temperature control to create the ideal thermal environment for product formation. During blow molding, precise cooling ensures even wall thickness of the molded products, improving product strength. In thermoforming, quick and uniform cooling allows products to set faster, increasing production efficiency while ensuring consistent product quality.   3. Other Plastics Processing Industries In addition to core applications in molding and processing machinery, Hengde chillers also play an essential role in the production lines of plastic pipes, cable trays, cables, and other plastic profiles. Once these products are molded, the chiller quickly cools them, ensuring that they maintain stable physical properties during the cooling process.    Hengde Industrial Chiller In Plastic Processing: When selecting a industrial chiller, Hengde’s professional team helps plastic manufacturers consider various factors. Based on production scale and thermal load requirements of the plastic processing, we precisely calculate the required cooling capacity. Depending on site conditions and energy supply, we recommend the most appropriate cooling method. For instance, air-cooled chillers are suitable for areas with limited water resources, while water-cooled chillers are more efficient for large-scale heat dissipation needs. We also factor in power specifications, environmental temperature, and humidity to ensure that the chiller is perfectly suited to the production environment. After installation, Hengde provides comprehensive maintenance plans, including regular deep cleaning, safety checks on electrical systems, and timely replacement of wear-and-tear parts to ensure long-term stable operation, extending the chiller's lifespan and supporting continuous production for plastic manufacturers.   Choose Hengde, Choose Perfect Chillers!

Chillers achieve cooling primarily through the refrigeration cycle, where four key components—compressor, condenser, expansion valve, and evaporator—work in close coordination. Below is a detailed explanation of how chillers create an effective cooling process:   1.Compressor Pressurization The compressor, as the heart of the chiller, plays a crucial role in converting low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas. During the compression process, the temperature and pressure of the refrigerant gas both rise. This change in state sets the stage for the subsequent condensation process, as refrigerant gas at higher pressures is more effective at transferring heat to the cooling medium, leading to a phase change.   2.Condenser Heat Exchange Once the high-temperature, high-pressure refrigerant gas enters the condenser, it undergoes heat exchange with the surrounding environment. In air cooled chillers, a fan drives air through the condenser to carry away heat, while water-cooled chillers utilize circulating water to absorb heat. During this process, the refrigerant gas cools down and condenses into a high-pressure liquid. Condensers are typically equipped with high-efficiency heat dissipation devices, such as variable-speed fans or enhanced heat exchange tubes, to improve heat transfer efficiency and speed up the refrigerant condensation process.   3.Expansion Valve Throttling and Pressure Drop When the high-pressure liquid passes through the expansion valve, there is a significant drop in both pressure and temperature. The primary function of the expansion valve is to regulate the flow of refrigerant, ensuring that it can fully evaporate in the evaporator, thereby achieving an effective cooling effect. This flow control is critical for maintaining the stable operation of the refrigeration system and optimizing its cooling efficiency.   4.Evaporator Heat Absorption The low-pressure, low-temperature refrigerant liquid enters the evaporator, where it quickly absorbs heat from the surrounding environment. In practical applications, chillers primarily absorb heat from cooling water, causing the refrigerant to vaporize into a low-temperature, low-pressure gas. During this process, the water inside the evaporator is cooled and then pumped to the equipment or systems that need cooling, transferring the heat and meeting the cooling demands of the system.   Through the continuous cycle of these four steps, chillers can reliably supply low-temperature cooling water to equipment or systems, ensuring stable operation under optimal temperature conditions. Compressor: Increases refrigerant pressure and temperature. Condenser: Dissipates heat, causing refrigerant to liquefy. Expansion Valve: Reduces refrigerant pressure. Evaporator: Absorbs heat, achieving cooling.   In summary, industrial chillers rely on the seamless cooperation of the compressor, condenser, expansion valve, and evaporator, as well as the continuous flow of refrigerant through these components, to achieve cooling. This process ensures the circulation of cooled water for various industrial applications and research experiments, providing reliable cooling support.    Hengde, with years of expertise in the chiller industry, is committed to continually optimizing product performance. Our chillers not only offer high cooling efficiency but are also equipped with intelligent control systems that precisely adjust cooling capacity to meet the diverse needs of different industries. With exceptional quality and comprehensive after-sales service, Hengde has built a strong reputation in the market, making it a trusted choice for companies seeking reliable refrigeration equipment.   Choose Hengde-Choose Perfect Chillers!

Industrial chillers are commonly used in modern industrial production to cool machinery and equipment through a circulating cooling water system. Whether an air-cooled industrial chiller can be placed outdoors requires consideration of various factors.   Theoretical and Design Considerations From a theoretical and design standpoint, air-cooled industrial chillers, which use air as the heat exchange medium, can be placed outdoors. Unlike water-cooled chillers, air-cooled chillers' biggest advantage is that they do not require an additional cooling water source, making them ideal for areas where water resources are limited. Air-cooled chillers work by using fans to drive air through the condenser, facilitating the heat exchange between the refrigerant and the outside air. As long as the airflow conditions are good, placing the chiller outdoors can meet its basic cooling needs. For instance, in spacious factory yards, an air-cooled industrial chiller can be placed outdoors, free from obstructions, allowing it to fully interact with the outside air and efficiently dissipate heat.   Challenges of Outdoor Placement However, placing the chiller outdoors comes with several challenges: Environmental Temperature Impact: In extremely high temperatures, the outside temperature may become too high, reducing the temperature difference for heat dissipation, which in turn lowers the cooling efficiency and affects the refrigeration performance. For example, during summer heatwaves, when the outdoor temperature reaches 38°C or higher, the chiller's cooling capacity may significantly decrease. Severe Weather Conditions: Weather events like heavy rain, dust storms, and heavy snow can damage the chiller's electrical components and outer casing. Rainwater could enter the electrical system and cause short circuits, dust may block the condenser fins and reduce heat exchange efficiency, and snow accumulation could damage the chiller's casing. Space and Security Issues: Installing the chiller outdoors requires ample space and additional security measures to prevent theft or vandalism. Noise Considerations: Air-cooled chillers, due to their built-in fans, produce noise during operation. If placed near residential or office areas, especially outdoors, the noise could cause disturbance to nearby residents or employees, impacting their work or quality of life.   Protection Measures for Outdoor Installation If a company decides to place an air-cooled industrial chiller outdoors, several protection measures are necessary. For instance: * Building a Protective Shelter: This shelter can shield the chiller from rain, dust, and direct sunlight while ensuring good airflow. * Installing Wind Shields: To prevent damage from strong winds, protective covers should be installed. * Regular Maintenance and Inspection: After harsh weather events, it’s essential to clean the chiller’s surface, check for debris, and inspect electrical connections to ensure everything is in working order.   Hengde's Air-Cooled Industrial Chillers for Outdoor Use Hengde’s air-cooled industrial chillers are specifically designed with outdoor use in mind. The chiller's casings are made from high-strength, corrosion-resistant materials that can withstand certain levels of harsh weather. Additionally, Hengde provides professional guidance on outdoor installation and protection solutions, ensuring that the equipment runs reliably in outdoor environments.   If you want to learn more about Hengde’s air-cooled industrial chillers or have any questions, feel free to contact us anytime at www.hengdechiller.com.   Choose Hengde, Choose Perfect Chillers!