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Refrigeration Compressors

Changzhou Jiangyou Heating&Cooling Technology Co., Ltd.: Your Professional Refrigeration Compressors Manufacturer!

We are located at No. 14 Fengrun Road, Luoyang Town, Wujin District, Changzhou City, Jiangsu Province, and are a comprehensive enterprise integrating technology research and development, production, sales, and service. Our company adheres to the principles of seeking truth, being pragmatic, innovating, and actively absorbing advanced technologies from domestic and foreign peers to continuously improve product quality and meet different customer needs. Our products have covered all provinces, municipalities, autonomous regions, and centrally-administered cities in China. With reliable product quality and excellent pre-sales and after-sales services, we have won the favor and trust of our customers.

Advanced Technology Equipment

Our company has introduced advanced technologies and equipment from both domestic and international sources, committed to producing high-quality refrigeration and air conditioning equipment. Through continuous innovation and technological upgrades, we can provide our customers with efficient, environmentally friendly, and durable products.

Diverse Product Lines

Specializing in the production of various high-demand cold storage plates, including arc angle cold storage plates, we offer products featuring environmental protection, corrosion resistance, and high flame retardancy. Additionally, we manufacture a wide range of cold storage doors such as double-open, single-open, electric or manual translational doors, chain doors, automatic return doors, free anti-collision insulation doors, modified atmosphere doors, and clean doors to meet diverse customer needs.

Professional Technical Services

Our business scope includes technical services, development, consultation, exchange, transfer, and promotion. With a professional technical team, we provide one-stop services from product design to installation and commissioning, ensuring every project achieves optimal results.

Comprehensive After-Sales Service

Beyond manufacturing and selling high-quality refrigeration and air conditioning equipment, we also offer installation and maintenance services. We commit to providing full support and assistance at every stage before, during, and after the sale, ensuring our customers face no worries throughout their usage period.

V-type Condenser
The V-Type Condenser is an innovative heat exchange solution tailored for high-efficiency cooling systems. Its unique V-shaped design maximizes heat transfer surface area, allowing for faster and...
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Emerson Compressors
Powered by Emerson's cutting-edge technology, these compressors set the standard for reliability, efficiency, and environmental friendliness. Featuring advanced compressor designs, they deliver...
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Semi-hermetic Compressor
The Semi-Hermetic Compressor combines the durability of traditional hermetic designs with the versatility of serviceability. Its semi-closed construction allows for easy access to internal...
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Condenser
Optimized for space-saving installation, our Ceiling-Mounted Evaporator efficiently distributes chilled air throughout enclosed spaces. Its sleek design blends seamlessly into any ceiling,...
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What is a Refrigeration Compressor

The compressor is the main component of refrigeration equipment, its function is to compress the refrigerant gas or fluid, thus allowing pressure changes to occur in the refrigerant gas or fluid, causing it to move along the refrigerant circuit.These changes in pressure and temperature along the refrigerant circuit lead to changes in the state of the refrigerant gas or fluid as it passes through the condenser, expansion valve and evaporator. With these changes in conditions, the refrigeration process takes place in a basic refrigeration circuit. The compressor is thus responsible for the refrigerant or refrigerant fluid to run through the entire refrigeration circuit, increasing the pressure and temperature of the refrigerant, causing the other elements to change state.

Different Types of Refrigeration Compressors

The Reciprocating Compressor

This compressor employs back-and-forth piston motion to compress the vaporized refrigerant. Another name for the reciprocating compressor is the piston compressor. This compressor comprises a motor, a crankshaft, and some pistons. The motor rotates the crankshaft, which then pushes the pistons. Each crankshaft rotation achieves actions: suction, compression, and discharge. All these actions are in sequence. As a result, gas displacement is discontinuous and causes vibration. Single-acting reciprocating compressors are those compressors where the refrigerant acts on one side. Double-acting compressors enjoy refrigerant action on two sides of the piston. Types of single-acting compressors include Open Type Compressors、Serviceable Semi-Hermetic Compressors、Bolted Serviceable Semi-Hermetic Compressors、Welded Hermetic Compressors. These reciprocating compressors come in low, medium, and high operating temperatures. You find reciprocating compressors in household refrigerators and freezers (welded hermetic compressors). Commercial refrigeration and air conditioning systems are semi-hermetic and welded hermetic compressors.

The Rotary-Vane Compressor

The vane splits the cylinder into suction and discharge sections. The pistons rotate to increase and decrease the volumes of the sections. Continuous rotation achieves gas suction, compression, and discharge. The operation of a rotary vane compressor includes five actions. These actions are; start, suction, compression, discharge then end. Each crankshaft rotation achieves all these five actions. You can find rotary vane compressors in domestic refrigeration and air conditioning units. They also feature heat pumps.

The Rotary-Screw Compressor

This compressor uses helical screw rotors to compress larger volumes of refrigerant. The compression involves the motor and the male and female rotors. The motor rotates the male rotor through the crankshaft. The male rotor moves the female rotor as the rotors inter-mesh against each other. The meshing rotors force the refrigerant through the suction port of the compressor. The compressed refrigerant leaves via the discharge port at a higher pressure. The screw compressor competes with large reciprocation and small centrifugal compressors. You find rotary screw compressors in commercial and industrial refrigeration and air-conditioning systems.

The Centrifugal Compressor

Another name for the centrifugal compressor is the turbo or radial compressor. This machine compresses the refrigerant by kinetic energy through rotating impellers. As the impellers rotate, they force the refrigerant through the inlet vane. The higher the impeller speed, the higher the pressure. The high-pressure refrigerant then passes through the diffuser. In the diffuser, the gas volume of the refrigerant expands as the speed decreases. Centrifugal compressors convert the kinetic energy of high-speed, low-pressure refrigerants. The result is low-speed high-pressure gas. Centrifugal compressors are suitable for large cooling applications. The centrifugal compressor is a favourite among commercial and industrial refrigeration systems.

Benefits of Refrigeration Compressors

Flexibility

Refrigeration compressors come in both oil-flooded and oil-free varieties. This means that if you prefer a reciprocating compressor for your application, you do not have to be limited by the constraint of oil contamination. In addition, refrigeration compressors can be tank-mounted or base-mounted, which decreases the constraints of placement.

Produces Higher Pressures

Refrigeration compressors can produce higher pressures than other compressors like rotary screw varieties. Pressures range up to 30,000 PSI. However, they are also suitable for climate control applications requiring 60-90 PSI.

High Efficiency

Refrigeration compressors can produce higher pressures while simultaneously using less energy to run. This makes this type of compressor extremely advantageous for applications where intermittent use with high pressure is needed.

9 Refrigeration Compressor Maintenance Tips to Prevent a Meltdown

Keep Them Clean
Cleanliness is paramount in maintaining refrigeration compressor efficiency. Over time, dust and grime can accumulate on essential components like coils and fans, impeding their function and leading to overheating. Regular cleaning of these parts and interior and exterior surfaces ensures optimal airflow and heat exchange, crucial for preventing malfunctions. Incorporate a cleaning schedule that includes thorough wiping of surfaces and deep cleaning of hard-to-reach areas to maintain your unit's efficiency. Neglecting cleanliness can lead to increased energy consumption and strain on the system, heightening the risk of a breakdown. Especially pay attention to the condenser coils and fan blades, as these are prone to accumulating debris. Clean systems function more efficiently and offer better cooling performance, which is crucial for the longevity of your stored products.

Inspect Regularly
Routine inspection is a critical preventive measure for commercial refrigerators. This involves thoroughly examining all components, including seals, gaskets, and electrical connections. Check for signs of wear and tear, leaks, or any abnormal noises that may indicate internal issues. Early detection of such problems allows for timely repairs, thereby averting major breakdowns and ensuring uninterrupted operation. In addition to physical inspection, monitor the performance of the refrigeration unit. Pay attention to cooling efficiency and any unusual patterns in temperature fluctuation. Regular inspections help maintain the unit in prime condition and identify potential areas that may require more frequent monitoring or maintenance.

Monitor Compressor Health
The compressor is the heart of your refrigeration system. Monitoring its health is crucial for preventing a meltdown. This includes checking for signs of overheating and unusual noises and verifying that it cycles on and off properly. A malfunctioning compressor can lead to significant system failures, so address any issues immediately. Regular servicing, including lubrication and checking for refrigerant leaks, can significantly prolong the life of the compressor. Be alert to any signs of wear or damage to the compressor. Regularly clean around the compressor area and ensure that it has adequate ventilation. If the compressor is overheating or making strange noises, it may be a sign that it needs professional attention. Keeping the compressor in good working condition is essential for the overall health of your refrigeration system.

Check Refrigerant Levels
Adequate refrigerant levels are essential for the efficient operation of your refrigeration system. Low levels can cause the compressor to work harder, increasing wear and the risk of a breakdown. Regularly check the refrigerant levels and look for any signs of leaks, as these can lead to inefficient cooling and increased energy costs. If you suspect a refrigerant issue, it's crucial to address it promptly to maintain the performance of your unit. Remember, handling refrigerants should be done by a professional due to the potential risks and regulations involved. Regular checks and timely refilling or repairs by qualified technicians can ensure that your system runs smoothly and efficiently.

Maintain Condenser and Evaporator Fans
The condenser and evaporator fans are key components in the cooling process. They need to be kept in good working order to ensure the efficient operation of your refrigeration system. Dust and debris accumulation can reduce their efficiency, leading to inadequate cooling and increased strain on the system. Regular cleaning and maintenance of these fans are necessary to prevent overheating and potential system failures. Check the fans for any signs of wear or damage, and replace them if necessary. Ensure that the fan motors function correctly and the blades are clean and free from obstruction. Proper maintenance of these fans can significantly improve the efficiency of your refrigeration system and reduce the risk of a meltdown.

Regularly Test Temperature Controls
Accurate temperature control is essential for the effective operation of commercial refrigeration compressors. Regular testing and calibration of thermostats and control systems ensure your unit maintains the desired temperature. This helps preserve the quality of stored products and prevents overexertion of the refrigeration system, which can lead to malfunctions. Storing the right foods on suitable shelves is also essential. Inconsistent temperatures can indicate issues with the temperature control system. Regular checks and prompt rectification of any discrepancies ensure that your refrigeration unit operates efficiently, maintaining the ideal environment for your products.

Inspect Electrical Connections
Loose or damaged electrical connections can lead to power disruptions and impact the performance of your refrigeration unit. Regular inspection of these connections is vital to ensure they are secure and in good condition. Check for signs of wear, corrosion, or damage to the wiring. Any issues with the electrical system should be addressed immediately to prevent malfunctions. Regularly testing the electrical components, including switches and circuit breakers, can also help in early detection of potential problems. Keeping the electrical system in top condition is crucial for your refrigeration unit's uninterrupted and efficient operation.

Prioritize Ventilation Around the Unit
Proper ventilation is crucial for the efficient operation of your refrigeration system. Without adequate airflow, the unit can overheat, leading to a meltdown. Ensure enough space around your refrigeration unit for air to circulate freely. Regularly clean any vents or air filters to prevent blockages, and avoid placing objects too close to the unit that could impede airflow. Good ventilation helps maintain the cooling system's efficiency and prolongs your refrigeration unit's life. It's important to consider the placement of your unit and the surrounding environment to ensure optimal ventilation and cooling performance.

Conduct Professional Audits Annually
Annual professional audits are an essential part of maintaining your commercial refrigeration compressor system. These comprehensive checks, conducted by experienced technicians, thoroughly examine all components. They can identify potential issues that may not be obvious during regular inspections. This includes checking for efficiency, wear and tear and ensuring all parts function correctly. Professional audits help in keeping your system up-to-date and in top condition. They provide peace of mind and help prevent unexpected breakdowns, ensuring your refrigeration system remains reliable and efficient year-round.

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Frequently Asked Questions

Q: How does a reciprocating compressor work in a refrigeration system?

A: It works by drawing air into the cylinder on its intake stroke and then compressing it on the piston's upstroke. This pressurized gas is then delivered through an outlet valve to perform work in the form of cooling.

Q: What is the role of a scroll compressor in a cooling system?

A: In these systems, scroll compressors are responsible for drawing in and compressing the refrigerant before it is sent to the condenser coil and into your home.

Q: Can you explain the operation of a screw compressor in refrigeration applications?

A: An opening valve sucks gas into the compressor chamber. Located in the chamber are the two screw rotors; when the machine is on, they will rotate at high speeds. As the impellers rotate, they trap and isolate air in the cavities between the rotors, thus moving the air down the chamber.

Q: What maintenance is required for a centrifugal compressor in an HVAC system?

A: You should periodically check the refrigerant levels. Low refrigerant levels can reduce the system's cooling capacity, leading to overheating and potential compressor failure. Next, pay close attention to the compressor's lubrication system. Regular oil changes are necessary for the compressor to run smoothly.

Q: How often should refrigeration compressor oil be changed?

A: The owner's manual is the best source to determine when you should change it. You may be unable to find your owner's manual, and there are some basic rules to follow. They are: Rotary Screw Compressors need an oil change every 1-2,000 service hours.

Q: What type of lubricant is best for refrigeration compressors?

A: If mineral and synthetic lubricants are both indicated, synthetic lubricants will in general offer a higher level of performance than mineral oils with respect to equipment protection, particularly at high- and low- operating temperatures, compressor efficiency, and oil life.

Q: How can you tell if your refrigeration compressor is low on refrigerant?

A: Signs of low freon include blowing warm air regardless of how long it's running, taking longer than normal to cool down, or having ice on the refrigerant line. You might also hear strange noises or see a spike in your electricity bill.

Q: How do you measure the efficiency of a refrigeration compressor?

A: In simple terms, to measure the performance of a refrigeration plant we need to know: The amount of cooling being carried out, Q, measured in kW. The amount of power consumed, P, also measured in kW. Then we can calculate the plant efficiency in terms of the ratio of cooling carried out to power consumed (Q/P).

Q: How does ambient temperature affect refrigeration compressor performance?

A: The expansion valve, which is located between the condenser and evaporator,the pressure in the evaporator depends only on the desire refrigerator temperature. So, for constant refrigerator temperature, increasing ambient temperature will lead to increase pressure lift and consistently compressor capacity.

Q: What is the typical lifespan of a refrigeration compressor?

A: The short answer is that your AC compressor and refrigerant should last about 12-15 years. Learning what crucial components, and how to maintain the compressor, can keep your AC running efficiently for its entire lifespan.

Q: How can you reduce noise from a refrigeration compressor?

A: Dissipaters such as baffles or fibrous materials can be placed in the cavity within the compressor shell to damp resonant vibration.

Q: How does altitude impact the functioning of a refrigeration compressor?

A: As altitude increases, atmospheric pressure and air density decrease. This means there are fewer air molecules in a given volume, which directly affects the compressor's ability to intake air. This means an air compressor at high altitude will produce less compressed air compared to one operating at sea level.

Q: What safety precautions should be taken when handling refrigeration compressors?

A: Refrigerant is a hazardous liquid and when handled incorrectly can cause serious injury. Suitable protective clothing, consisting of face protection, heat-proof gloves, rubber boots, and apron or waterproof overalls, must be worn when carrying out operations on the air conditioning system.

Q: How do you troubleshoot a refrigeration compressor that won't start?

A: You should first verify that there is no power being supplied to the compressor, that you have incoming power to the control board and that the external controls are functioning properly before condemning the electronic control. Look on the control board for signs of arcing, burnt connections or damaged foil.

Q: What are the differences between single-stage and two-stage compressors?

A: The main difference between single-stage versus two-stage air compressors is the number of times the air is compressed. While a single-stage compressor compresses air once, a dual-stage compressor compresses twice for higher pressure and power.

Q: How does a variable speed compressor differ from a fixed speed compressor?

A: When demand fluctuates, a VSD compressor that varies its speed is much more energy efficient than a fixed-speed compressor that can only run flat out. While VSD compressors cost more up front, they pay back the added investment through energy savings.

Q: What is hermetic protection in refrigeration compressors?

A: Hermetic basically means fully sealed or air tight. Conventionally, the compressor, receiver, filter drier and valves used to be fitted to the pipelines through flanged nut and bolt connections or threaded connections. With these units, there was always a limitation on the low pressure that the unit could work on…

Q: How does refrigeration compressor loading and unloading work?

A: When air is required, a signal is sent to the solenoid valve which guides the compressor's inlet valve to the fully open position. The valve then either fully opens (loaded) or becomes closed (unloaded). There is no intermediate position.

Q: What is the impact of voltage fluctuations on refrigeration compressors?

A: If the voltage is lower than 187 V, the refrigerator can’t work on and even burn down the compressor. If the voltage is higher than 242 V, the compressor and other electric parts are easy to be burnt out. Moreover, if the voltage fluctuation range is less than 10 V, a regulator is not necessary.

Q: How important is the suction line design for a refrigeration compressor?

A: The suction line is the most critical line in the piping system. It must be carefully designed to ensure a uniform return of dry refrigerant vapour and entrained oil to the compressor. If slugs of liquid refrigerant or oil, or both, reach the compressor, serious compressor damage can result.

We're professional refrigeration compressors manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy discount refrigeration compressors made in China here from our factory.

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