Industrial chiller,Industrial freezer, TCU, Recirculation

Industrial freezer, TCU, Recirculating air control system ,Ultra-low temp. Water-cooled chiller

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What Is a Heat Pump Chiller

A heat pump chiller is a refrigeration system that provides chilled water while recovering heat for reuse. Unlike a standard industrial chiller, the heat released from its condenser is not directly expelled into the air or a cooling tower. 

Instead, the condenser side uses water to capture this heat and transfer it for process heating or space heating. For processes that require both cooling and heating, a heat pump chiller is often preferred over heating-only boilers or cooling-only chillers.

Heat pump chillers provide efficient cooling and heating, recover heat for reuse, reduce energy costs, and fit commercial or industrial appl

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Standard Chiller vs. Explosion-Proof Chiller：What Is the Difference

When people talk about chillers, they often mean the standard models you see in labs, factories, or HVAC systems. But in certain industries, using a standard chiller can be a real safety risk. That’s where explosion-proof chillers come in. If you’re unsure whether a standard chiller or an explosion-proof chiller is right for your project, it helps to understand what sets them apart.

Standard Chiller vs Explosion-Proof Chiller What Is the Difference

Explosion proof chillers protect hazardous sites by preventing ignition risks, while standard chillers serve safe environments with cost eff

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What is the Most Energy Efficient Chiller?

When it comes to saving energy (and money 💸), not all chillers are created equal. The most energy-efficient chiller isn’t just the one with the highest COP on paper — it’s the system designed to match your load profile, climate, and operations.

Here’s what really makes the difference in efficiency: ⚡ VFD chillers that adapt to demand and cut cycling losses ❄️ High COP chillers optimized for part-load performance ♻️ Heat recovery chillers that reuse rejected energy 🧠 Smart controls that tune setpoints and reduce wasted power 🔧 Advanced heat exchangers, efficient pumps, and low-lift design

The result? Lower utility bills, longer equipment life, and a system that pays you back every day it runs.

💡 Want to know which chiller design is right for your plant or lab? 👉 Read the full article here:

What is the Most Energy Efficient Chiller

Energy-efficient chillers designed for VFD, high COP, smart controls, and heat recovery help cut costs and optimize industrial operations.

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❄️ Can Refrigerants Be Mixed in Chillers?

It’s a question our chiller technicians hear all the time: “Can I just top off my chiller with a different refrigerant if the original is running low?”

The short answer: No. Mixing refrigerants in a chiller may look like a quick fix, but it creates long-term problems: ⚠️ Compressor stress and early failure ⚠️ Chemical incompatibility and corrosion ⚠️ Higher energy bills and poor efficiency ⚠️ Voided manufacturer warranty

Every industrial chiller is designed for a specific refrigerant. Once you start mixing, the system chemistry changes—and the result is often expensive repairs and downtime.

💡 Want to know why refrigerant mixing is so risky, and how to prevent it in your system? 👉 Read the full article here:

Mixing refrigerants in chillers can cause compressor damage, efficiency loss, and safety risks. Learn how to prevent accidental mixing.

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🌍 What Are Chillers Used For? | LNEYA

Ever wondered why factories, hospitals, and labs rely so heavily on chillers? The answer is simple: without them, machines would overheat, products would fail, and entire production lines could grind to a halt.

From industrial chillers keeping injection molds precise, to medical chillers ensuring MRI machines run nonstop, cooling technology is the quiet hero behind modern life.

Here are just a few surprising chiller applications: ✨ In plastics, they keep molds from warping. ✨ In semiconductor fabs, they protect million-dollar wafers. ✨ In pharma, they guarantee compliance and safe batches. ✨ Even your favorite cold drink was touched by a process cooling system before bottling.

And that’s just the beginning. The full list covers precision cooling in metalworking, cleanrooms, laser equipment, printing, and more.

💡 Want to dive deeper? Read the full article here :

👉 What Are Chillers Used For

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12 Safety Devices Every Chiller Must Have

Chillers run with high voltage and heavy compressors. Sounds risky? Don’t worry — modern chillers are built with multiple safety devices to protect both the system and the people running it.

Here are just a few examples:

High Pressure Protection stops the compressor from damage caused by overpressure.

Low Pressure Protection prevents evaporator freezing and compressor idling.

Anti-Freeze Protection shuts down the system if water temperature drops too low.

And that’s only the start. 👉 Want the complete list of 12 safety devices and how they work? Check out the full guide here: [https://www.lneya.com/blog/what-are-the-safety-devices-used-in-chillers.html]

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Chillers Circulators that control the processing temperature on the Fab equipments. https://www.lneya.com/special-chiller/component-test-temp-control-systems/cooling-chiller-flt

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Energy storage liquid cooling thermostat chiller

Scope of application: energy storage containers, energy storage battery cabinets, energy storage battery heat dissipation and other applications;

Features:

Protection above IP50 can meet anti-corrosion requirements

Intelligent, multilingual color touch screen, providing clear and comprehensive important data information

Real-time display of flow pressure data

Fully enclosed design of ethylene glycol antifreeze circulation system

Support dual system cooling circuits, mutual backup to avoid battery shutdown and safety failure

Can be used below 3000 meters above sea level

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Closed hot and cold cycle machine compressor fault repair process

LNEYA's closed-type hot and cold cycle machine adopts single-machine self-cascading refrigeration technology, and its compressor also uses the brand compressor, which is more stable in performance. Therefore, it is easy to choose a series of compressors with general performance. malfunction. If the screw compressor is used in the closed type hot and cold cycle machine, the operation and maintenance process is very simple. Before the screw compressor of the closed type hot and cold cycle machine must be overhauled, if possible, the slide valve is unloaded to the “0” position. , normal shutdown, cut off the power. The compressor can be disassembled by cutting off the piping connected to the compressor and discharging the refrigerant and lubricating oil in the compressor. Be careful to develop good habits when disassembling. Parts of different parts should be placed separately and the necessary assembly marks should be made. After removing the pipes, couplings and anchor bolts connected to the compressor of the closed type hot and cold cycle machine, the compressor is lifted to the workplace. Remove the suction filter, suction check valve, and remove the energy indicator. Remove the locating pin, remove the suction end cap in parallel, and take out the oil piston and balance piston. Note that when the positioning pin is taken, it can only be pulled out and cannot be pulled out. Be sure to take out the positioning pin first, then remove all the bolts to prevent the weight of the suction end cover from acting on the positioning pin and bend the positioning pin. Remove the shaft cover and remove the shaft seal. Be careful not to touch the moving and stationary rings, remove the positioning pin, remove the exhaust end cap, and remove the bearing gland, lock nut, washer, thrust bearing, adjusting pad, etc. To remove the locknut, use a special special tool and first open the lock tab of the lock washer. Mark them at any time and place them separately. After removing the compressor positioning pin, remove the exhaust end seat and use the special eye bolt to slowly and smoothly remove the active rotor, and do not collide with the body. At this time, the driven rotor rotates accordingly, and the driven rotor is taken out and the spool is taken out. Wuxi Guanya (LNEYA) closed type hot and cold cycle compressor adopts Hanzhong, Bitzer, Copeland, Danfoss and other brands, and its performance is reliable. It is suitable for refrigeration, chemical and other industries, and has been highly praised by users.

Web：https://www.lneya.com

Mail：[email protected]

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LNEYA closed cycle refrigerator maintenance instructions

LNEYA closed cycle refrigerators should start to pay attention to their maintenance work after a long time of use, then how to carry out maintenance work? How to do maintenance work for it? According to the specific use environment and the frequency of using the closed cycle refrigerator, if the use time is short and the running power is relatively low, the maintenance period of the equipment can be extended appropriately during maintenance. For many special enterprises, in order to maintain the safety and stability of the equipment in the long-term uninterrupted use, it is recommended to adjust the maintenance period to half a year. The maintenance cycle can be shortened, and it is possible to find out whether there is a fault and perform effective maintenance in a timely manner, and keep the closed cycle refrigerator in a normal operating state, so that the space temperature can be reduced with less cost. As a core component of a closed cycle refrigerator, if there is a fault, the normal use of the compressor is directly jeopardized, so the compressor is taken as the main maintenance item during maintenance. It can timely analyze the operating status of the equipment compressor and determine whether the equipment compressor is in overload operation, which can guarantee the long-term safety of the enterprise. Many companies ignore the detection of pressure gauges when maintaining closed cycle refrigerators. If there is a problem with the pressure gauge, when using a closed cycle refrigerator, it is easy to cause problems such as abnormal pressure changes in the equipment. If it is used for a long time under abnormal pressure, the safety of use will continue to decrease, and even some unexplained failures will threaten the normal use of closed-cycle refrigerators. The lower the cost of closed-loop refrigerators, the closed-loop refrigeration. The higher the efficiency of the machine to reduce the space temperature. In order to improve the use efficiency of the closed cycle refrigerator, it is necessary to carry out comprehensive inspection on a regular basis, which is advantageous for eliminating various failures and prolonging the service life.

Web：https://www.lneya.com

Mail：[email protected]

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How to solve the problem of insufficient cooling capacity of semiconductor cooling cycle system？

The semiconductor cooling cycle system is a device for cooling the semiconductor heating part. LushiA reminds that if the cooling capacity is insufficient during the operation, it is necessary to check in time to see if something has gone wrong. When the cooling capacity of the semiconductor cooling cycle system is insufficient, it is first determined whether the filter is blocked. The blockage of the filter includes: suction filter blockage and dry filter blockage. At this time, it only needs to be cleaned and cleaned. By observing whether it is the reason why the expansion valve of the semiconductor cooling circulation system is too small or too large, the amount of water is adjusted. The problem of leakage of the filling agent in the temperature sensor of the expansion valve can be solved by opening the cooling tower. A dirty or blocked ice valve can be solved by cleaning. In the semiconductor cooling cycle system, the bearing clearance after the bearing wear is too large, and the problem of insufficient cooling capacity can be solved by inspection and replacement. Use components with precise structure, high reliability and long life. To ensure the stable operation of the unit. The condenser is a shell-and-tube condenser that optimizes temperature field distribution and refrigerant flow field distribution, and has high heat exchange efficiency. The outer fin design of the heat exchange tube enhances the heat exchange condensation and improves the heat exchange efficiency outside the tube.

Insufficient refrigerant charging in the semiconductor cooling cycle system, excessive refrigerant leakage, etc. may also cause insufficient cooling capacity of the semiconductor cooling cycle system. These problems can be achieved by adding or subtracting refrigerant recharge amount, leak detection, and adding refrigerant after maintenance. solve. The evaporator is used with too small evaporator to thicken the frost>There is a large amount of lubricating oil in the evaporator or the outlet valve of the liquid reservoir is too small, the cooling water is insufficient or the water temperature is too high, so the semiconductor cooling circulation system will be cooled. Not enough. If the evaporator is too small, it can reduce the heat load or replace the evaporator. If the evaporator frost is too thick, it needs to be frosted regularly. There is a lot of lubricating oil in the evaporator, and the refrigeration oil, condenser or reservoir is recovered. The outlet valve is opened too small, and the outlet valve is properly opened. In addition, there is excess air in the refrigeration system of the semiconductor cooling cycle system, and the energy adjustment indication is incorrect and needs attention. Excess air in the refrigeration system can be solved by discharging air. If the energy adjustment indication is incorrect, the indicator light may be broken and can be solved by inspection and replacement. The reason for the insufficient cooling capacity in the semiconductor cooling cycle system is as shown above. It is recommended that users find out that they can contact the manufacturer in time for after-sales solution.

Web：https://www.lneya.com

Mail：[email protected]

TEL：[phone]

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Manufacturer analysis - 90 ° C single-stage refrigeration system compressor common form

There are many types of compressors in the -90 °C single-stage refrigeration system. The most used ones are the piston refrigeration compressors. So, do you know which types? In the refrigeration system industry, the more commonly used refrigeration compressors are screw, piston and centrifugal. Piston compressors are mostly used in the -90 ° C single-stage refrigeration system of the box-sealed structure (called water-cooled box - 90 ° C single-stage refrigeration system), which is divided into fully enclosed, semi-closed and sealed according to the sealed type. Open three. The -90 °C single-stage refrigeration system semi-hermetic compressor is characterized in that the body and the motor housing are bolted and sealed with a gasket to form a closed fuselage. The motor is mounted directly on the crankshaft of the compressor. The sealability of this compressor is better than that of the open type, which reduces or even avoids leakage. The -90 °C single-stage refrigeration system open-type compressor is characterized in that the power input end of the shaft extends out of the body and is coupled to the motor by a transmission such as a coupling or a pulley. The crankshaft extends out of the body and is sealed by a shaft sealing device. Since it is impossible to achieve sealing by the shaft sealing device, leakage of refrigerant and lubricating oil in the refrigeration system and infiltration of outside air are inevitable. Therefore, such a compressor is not suitable for a small automatic refrigeration system without a small amount of filling and without an air separator. -90 °C single-stage refrigeration system Fully enclosed compressor is characterized in that the body and the motor are installed together in a closed casing, and the joints of the casing are welded. From the appearance, only the suction, exhaust pipe and the terminal of the motor, the sealing performance of this compressor is good. Regardless of the type of piston refrigeration compressor used, this single-stage refrigeration system can be collectively referred to as a piston single-stage refrigeration system, and is one of the commonly used models in various industries.

Wuxi Guanya (LNEYA)-90°C single-stage refrigeration system manufacturers choose the compressor according to the corresponding model. In the compressor brand selection, the brand manufacturer compressors are selected, which is more stable in performance.

Web：https://www.lneya.com

Mail：[email protected]

Tel：[phone]

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-80 °C refrigerator manufacturer operating equipment points

When the user chooses the -80 °C refrigerator, it is definitely necessary to have a reliable quality. Wuxi Guanya (LNEYA)-80 °C refrigerator should pay attention to its operation details during operation to avoid equipment failure caused by improper operation. The following items should be mastered during use. Please check if the -80 °C refrigerator is damaged during installation, and choose the right place for installation and future maintenance. The site where the unit is installed must be the floor, mounting mat or foundation with a level of 6.4 mm and can withstand the operating weight of the unit. - It should be placed in a machine room with a room temperature of 4.4-43.3 °C. There should be enough space around and above the unit for routine maintenance work. A pipe space for cleaning the condenser tube bundle should be left at one end of the device, or a door hole or other suitable hole can be used. Select the water pipe of the appropriate pipe diameter, the cooling system and the cold water system of the -80 °C refrigerator unit during high power operation, and connect them correctly. For normal applications, the water flow rate through the evaporator and condenser is between 1.0 and 3.6 m/s. Under any load, the water flow rate should be stable. All chilled water and cooling water pipes should be designed and installed according to the conventional method. The chilled water pump should be located on the inlet pipe of the unit to ensure the positive pressure and flow in the unit. The piping should be provided with a damping tube to ensure proper flexibility and to prevent the evaporator water from being drained when the pump is shut down. The piping should have a solid support independent of the -80 °C refrigeration unit to prevent stress from being applied to the refrigeration unit components. The hangers are set up to facilitate pipe alignment. -80 °C refrigerator manufacturers will provide corresponding instructions when the equipment is shipped from the factory, users need to read and operate carefully when using.

Web：https://www.lneya.com

Mail：[email protected]

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Maintenance instructions for compressors at minus 85 degrees ultra low temperature freezer

The compressor in the ultra-low temperature freezer of minus 85 degrees is one of the main components, and its performance is very important, so maintenance is also very important. For manufacturers of sub-85 degree ultra-low temperature freezer compressor systems, the detection and replacement cycle of compressor refrigeration oil is related to the process control of its production. If the cleanliness control of the evaporator and condenser of the system and the system piping are better, then relatively less pollutants enter the compressor, and the detection and maintenance cycle can be relatively longer. The acidification of the sub-85 degree ultra-low temperature freezer compressor lubricating oil will directly affect the life of the compressor motor, so it should be checked regularly whether the acidity of the lubricating oil is qualified. Generally, the acidity of the lubricating oil should be replaced if it is lower than PH6. If the acidity cannot be checked, the system's drying filter should be replaced periodically to keep the system dryness under normal conditions. If the contaminants in the refrigerating oil and the water content exceed a certain value, it is recommended to replace the refrigerating oil. The lubricating oil in the ultra-low temperature freezer of minus 85 degrees can form a dynamic seal between the screw and the compression chamber and the male and female screws, reducing the leakage of the refrigerant from the high pressure side to the low pressure side during the compression process. The compressed refrigerant is cooled, and the oil is injected into the compressor to absorb the heat generated by the refrigerant gas during the compression process, thereby reducing the exhaust gas temperature. An oil film is formed between the bearing and the screw to support the rotor and to lubricate. The differential pressure force is transmitted, and the capacity adjustment system is driven to adjust the position of the volume adjustment slider through the action of the compressor's loading and unloading solenoid valve, thereby realizing the compressor capacity adjustment control and reducing the running noise. The internal lubricating oil of the sub-85 degree ultra-low temperature freezer compressor is the key to maintain the normal operation of the compressor. The general lubricating oil problems include: foreign matter mixing, causing lubricating oil pollution, blocking the oil filter; high temperature effect causing lubricating oil degradation, losing lubrication function ;-85 degrees ultra-low temperature freezer system water pollution, acidification, erosion of the motor. Wuxi Guanya (LNEYA) sub-85 degree ultra-low temperature freezer compressors are branded manufacturers of compressors, including Emerson, Du Ling, Bitzer, Hanbell and other brands, may be less in the failure rate, but still need Regular maintenance.

Web：https://www.lneya.com

Mail：[email protected]

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Instructions for the LNEYA 5hp Freezer Condenser

5hp freezer is one of the most demanding equipments in the industrial cold processing industry. Wuxi Guanya (LNEYA) is one of the related manufacturers, reminding users that when choosing a 5hp freezer condenser, we need to pay attention to the use and maintenance. The matter is clearly understood. With the operation of the 5hp freezer evaporative condenser, part of the water evaporates, minerals and other impurities in the water are left behind to accumulate in the pool of the evaporative condenser. Therefore, the refrigerant must be inspected regularly and cleaned regularly. Good control of water quality and prevention of scaling. The fresh water should be cleaned with fresh water, and it must be filtered when there is impurities in the water. If the supplemental water is too hard, softened water treatment should also be considered. The water treatment plan should be developed in conjunction with an experienced professional water treatment company. Always check the operation of the evaporative cold water pump and the fan, and do regular maintenance and inspection. Whether the two components operate normally will directly affect the heat transfer effect. The 5hp freezer evaporative condenser should also consider the antifreeze of circulating water during winter operation, especially in northern China. Systems using a 5 hp freezer evaporative condenser should note that the presence of non-condensable gases in the system will significantly reduce the heat transfer of the evaporator, resulting in higher condensing pressure. Therefore, the air venting operation must be performed frequently, especially the low temperature system in which the chiller suction pressure is a negative pressure. In actual use of the evaporative condenser, the use state of the evaporative condenser and the number of units used should be adjusted according to the changes in the environment and the area of use in different seasons, so that the system can operate economically and achieve energy saving. When the 5hp freezer system heat load is relatively small, or the temperature is relatively low, the number of evaporative condensers can be reduced. When the ambient temperature is relatively low, the fan operation is stopped, and only the water pump can be turned on, and the refrigerant is condensed by water alone. When the temperature drops below the freezing point, pay attention to the antifreeze problem of the water, and ensure that the water does not freeze. Maintenance is important for the use of its equipment, so regular maintenance of the various components of the 5hp freezer is necessary.

Web：https://www.lneya.com

Mail：[email protected]

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LNEYA low temperature chiller selection classification description

Different enterprises and different industries have different requirements for the low-temperature chiller of Wuxi Guanya (LNEYA). The choice of models is also different, so it is better to understand them in the selection. The low temperature chiller is a refrigeration device produced by LNEYA using a single-machine self-cascading refrigeration technology to transfer heat from an object below the ambient temperature to an environmental medium. There are many types of cryogenic chillers, compression type (including steam and air compressors), absorption type and steam injection type, among which steam compression type is more common. The principle of running a low-temperature chiller is also to be understood. In order to continuously cool, a compressor is required to suck the vaporized low-pressure steam from the evaporator, work on it, compress it into a high-pressure superheated steam, and then discharge it. Into the condenser (the pressure is increased in order to make the refrigerant vapor easily release heat at normal temperature and condense into a liquid). The high-pressure superheated steam is condensed into a liquid in the condenser by using cooling water or air, and the heat is taken away, and the refrigerant liquid is discharged from the bottom of the condenser. This cycle is repeated to achieve continuous cooling. In a nutshell, this refrigeration method is to vaporize the refrigerant under low temperature and low pressure to absorb the heat of the surrounding medium, and condense and liquefy under normal temperature and high pressure to release heat from the cooling water (or air). In order for the refrigerant to achieve such heat transfer, it is necessary to provide low pressure and high pressure conditions corresponding to the evaporation temperature and the liquefaction temperature, which conditions are created by the compressor. Therefore, in the vapor compression refrigeration cycle, the low temperature chiller can only have a compressor to continuously transfer the heat of the low temperature object to the normal temperature medium, thereby achieving the purpose of refrigeration. Of course, the models defined by different low-temperature chiller manufacturers are different. It is recommended that users provide detailed operating conditions for low-temperature chiller manufacturers to choose.

Web：https://www.lneya.com

Mail：[email protected]

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How to check the air tightness of 40 screw freezer?

Air tightness is related to the cooling effect of the entire 40-screw freezer. Therefore, the manufacturer of 40-pin screw freezer of LushiA (LNEYA) recommends that users do 4 inspections, then how to check the work? This test is carried out on a refrigeration system with a 40-screw freezer evaporating pressure gauge close to or below atmospheric pressure. The vacuum leak test using an external mechanical vacuum pump is generally used in a small 40-hp screw freezer. When the hour hand unscrews the fine screw plug of the suction cut-off valve passage, turn the suction cut-off valve rod several times clockwise to make the suction cut-off valve in the three-way state; use a soft connector with a three-way repair valve and a vacuum pressure gauge The vacuum pump is connected to the multi-purpose interface on the suction shut-off valve; all the valves in the system (including solenoid valve and manual valve) are opened; the vacuum pump power is turned on, and the system is vacuumed until the reading of the vacuum gauge reaches -0.1MPa. After the appropriate time, the suction shut-off valve stem is rotated counterclockwise to withdraw and tighten; for 18~24h, if the vacuum is constant, the vacuum test of the refrigeration system is considered qualified. The 40-cylinder screw chiller uses the compressor in the system for self-vacuum test when doing air tightness test. For larger refrigeration systems, vacuum test is usually carried out by this method, and self-vacuum is performed by the compressor in the system. First, the exhaust cut-off valve stem is selected clockwise to the end, so that the system loses the circulation passage at the exhaust port of the compressor. Rotate the fine screw plug of the exhaust passage valve counterclockwise to make the exhaust port open to the atmosphere. Open all valves in the system. Short-circuit the contacts of the low-voltage relay and temporarily remove the protection function (recovery afterwards). Start the compressor and let the air in the system discharge into the atmosphere (the suction valve of the compressor should be slowly opened to prevent the gas in the system from being discharged, causing the exhaust pressure to be too high and causing high voltage protection, etc.). Observe the vacuum gauge at the low pressure end until the reading of the vacuum gauge reaches -0.1 MPa. After the appropriate time, the exhaust shutoff valve stem is rotated out and tightened. Hold for 18~24h, if the degree of vacuum is unchanged, it is qualified. The air tightness check should be checked regularly to check the details of all aspects of the 40 screw freezer from various data.

Web：https://www.lneya.com

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