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Hermetic Scroll Compressor

Shenzhen Ruifujie Technology Co.,Ltd: Your Professional Hermetic Scroll Compressor Manufacturer!

 

Shenzhen Ruifujie Technology Co., Ltd. is a large-scale modern enterprise specializing in R&D, production, and sales of refrigeration products. The company has great advantages in the trading of compressors and refrigeration accessories and has close cooperation with major compressor manufacturers around the world. The company develops and produces scroll, piston, and screw compressors that are exported to all over the world. We have strong technical strength and experience in cold storage, freezing, quick freezing, and flake ice machines, block ice machine production, and sales.


Rich Product Variety
Our company can produce hermetic scroll compressor, hermetic piston compressor, semi-hermetic piston compressor, screw compressor, hermetic air-cooled condensing unit, semi-hermetic air-cooled condensing unit, semi-hermetic water-cooled condensing unit, piston parallel condensing unit, screw condensing unit, air cooled condenser, air cooler, flake ice machine, block ice machine, fresh storage, freezing room, quickly freezer room, large freezer room, and so on.

 

Quality Guaranteed
We have more than 20 years of experience in the development of compressors and refrigeration accessories. We strictly control product quality and insist on making high-quality products.

 

Wide Range of Product Uses
Our products are widely used in cold storage, frozen food processing and storage，low-temperature shelf, ice cream machine, showcase, chiller, large integrated air conditioning, laboratory and medical equipment, cold dryer，etc.

 

Leading Service
We have many years of industry experience and a complete production management, quality supervision, sales service operation system. Whether you want to buy a hermetic scroll compressor or a hermetic piston compressor, just send your requirements by email and we can customize the product for you.

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What is Hermetic Scroll Compressor

 

A hermetic scroll compressor is a sealed compressor, where the compression components consist of an orbiting scroll and a stationary scroll. It has an airtight seal that prevents any foreign matter (such as air, oxygen or moisture) from entering the compressor.

 

What are Advantages of Hermetic Scroll Compressor

 

Superior Cooling
Hermetic scroll compressors commonly exist for refrigeration and air conditioning purposes. The hermetic scroll compressor design prevents the loss of refrigerant/coolant from the compressor. Thus, it has a high cooling capacity.

 

Noise-Free Operation
Scroll compressors in general are pretty quiet during operation. Hermetically sealed scroll compressors are even more efficient in this regard.

 

High Air Quality
Since no foreign material can pass into the compressor, a hermetically sealed scroll compressor can supply a superior quality of air.

 

Energy Efficient
Hermetic scroll compressors are very efficient as no air/gas is lost during compression. They also draw less power and thus can compress more air for the same amount of power supplied.

 

Durable
Hermetic Scroll compressors are very durable and last for a very long time without maintenance. Moreover, hermetic scroll compressors are also used for many other applications where maintenance is not desirable.

 

What are the Applications of Hermetic Scroll Compressor

Air Conditioner

Hermetic scroll compressors are widely used in household and commercial air conditioners, and their high efficiency, quietness and stability have been highly recognized by users. At the same time, the compression ratio range of hermetic scroll compressors is very wide, which is suitable for the compression requirements of different models of air conditioners.

Cold Storage and Freezer

The high efficiency of hermetic scroll compressors makes them an important part of cold storage and freezer. Hermetic scroll compressors have good refrigeration effect and fast freezing speed, which can effectively keep food fresh and of the best quality.

Heat Pump

The hermetic scroll compressor is one of the core components of the heat pump. It is responsible for evaporating low-temperature and low-pressure liquid into high-temperature and high-pressure gas, and transporting it to the heat exchanger for heating, thereby realizing the heating function of the heat pump.

 

 
Process of Hermetic Scroll Compressor
 
01/

Material Selection
The core parts of the hermetic scroll compressor, such as the impeller, guide vane, and casing, need to be made of high-strength and high-wear-resistant materials, such as aluminum alloy and stainless steel.

02/

Process Design
The impeller, guide vane and other parts of the hermetic scroll compressor need to undergo multiple process processing, and each process link must be strictly controlled to ensure the quality and performance of the product.

03/

Impeller Processing
The impeller is the core part of the hermetic scroll compressor and needs to undergo multiple process processing, such as rough turning, fine turning, milling, cutting, polishing, etc. At the same time, strict quality control and testing are required to ensure that the quality and performance of each impeller can meet the requirements.

04/

Guide Vane Processing
The guide vane is a fixed blade around the impeller and is also one of the factors affecting the performance of the hermetic scroll compressor. It is necessary to carry out mold manufacturing, blade bending and other processes according to the design drawings, and strict size and angle control is required to ensure accuracy and stability.

05/

Casing Processing
The casing of the hermetic scroll compressor needs to be made of high-strength and high-wear-resistant materials, and the processing process requires multiple processes, such as stamping, cutting, welding, polishing, etc. At the same time, the size and shape need to be strictly controlled to ensure that the quality and performance of each casing can meet the requirements.

06/

Assembly
During the assembly process of the hermetic scroll compressor, it is necessary to assemble according to the process flow. Among them, the installation and positioning of core components such as turbine blades and guide vanes need special attention to ensure assembly accuracy.

07/

Quality Control
After the assembly is completed, strict quality control and inspection are required, such as axial penetration, parallelism, impeller rotation direction, etc., to detect whether the performance of the scroll compressor meets the requirements.

08/

Debugging
The debugging process of the hermetic scroll compressor requires multiple tests, such as testing pressure, temperature, noise, vibration and other indicators to verify whether the quality and performance of the product meet the requirements.

 

Components of Hermetic Scroll Compressor
 
Copeland Scroll Compressor ZR Series
 

Rotor

The rotor of a hermetic scroll compressor consists of a certain number of curved blades arranged on a rotor disk. It is the core component responsible for the intake, compression and output of gas. Generally, the rotor of a hermetic scroll compressor is divided into single-stage and multi-stage. The single-stage rotor has only one layer of blades, while the multi-stage rotor usually has two or more layers of blades.

 

Inlet and Outlet

The inlet and outlet are an important part of the hermetic scroll compressor, which connects the gas intake and discharge channels. Their shape and size have an important impact on the performance and efficiency of the hermetic scroll compressor.

Performer Hermetic Compressor R22
4HP Scroll Compressor
 

Stator

The stator is the fixed part of the hermetic scroll compressor, usually composed of a pressure relief valve, oil remover, cooler, motor, coupling, etc. The stator supports the rotational motion of the rotor and delivers the gas into the rotating rotor through the blades on the stator.

 

Bearing

The bearing is an important part of the hermetic scroll compressor. It supports the rotating part of the rotor so that the rotor can run smoothly and with low noise. At the same time, the bearing can also help reduce friction and rotational resistance, thereby improving the efficiency and performance of the hermetic scroll compressor.

Daikin Refrigeration Compressor

 

How to Choose Right Hermetic Scroll Compressor
 

Power and Exhaust Volume
According to actual needs, select a hermetic scroll compressor with appropriate power and exhaust volume to ensure the operating efficiency and stability of the equipment.

 

Energy Efficiency
Energy efficiency is an important indicator of the hermetic scroll compressor. When purchasing, you need to pay attention to the energy efficiency level of the equipment and try to choose products with high energy efficiency.

 

Noise and Vibration
Noise and vibration are inevitable problems when the hermetic scroll compressor is running. When purchasing, you need to pay attention to these factors and choose products with low noise and low vibration.

 

Maintenance and Care
Maintenance and care are the key to ensuring the long-term stable operation of the hermetic scroll compressor. It is necessary to consider the difficulty of maintenance and care of the equipment.

 

Difference Between the Hermetic Scroll Compressor and the Semi-Hermetic Scroll Compressor

 

Construction
A hermetic scroll compressor is very compact as the compressor and motor are placed on a single shaft and sealed together. The internal construction of a semi-hermetic scroll compressor is quite similar to that of a hermetic compressor. However, there is some difference in the sealing method. Once the internal parts are assembled, the casing is welded together in a hermetic scroll compressor. In a semi-hermetic scroll compressor, the casing is bolted together.

 

Maintenance
A hermetic scroll compressor doesn’t require any external lubrication. So, you don’t have to worry about an oil change. However, in case of a failure, repairing is not feasible as you have to cut open the compressor. So, you will usually discard the compressor when it stops functioning. But, the semi-hermetic scroll compressor advantage offers better serviceability. You can open the casing in the event of a failure without damaging it. So, semi-hermetic compressor repair is easier.

 

Lifetime
Hermetically sealed construction of air compressors is very common in many home appliances such as refrigerators, air conditioners, and heat pipes. Because end users are not fond of maintaining their appliances too often. And, hermetic scroll compressors can last for years without any maintenance. However, the performance would gradually drop and eventually fail before a semi-hermetic scroll compressor goes through regular maintenance.

 

FAQ

Q: How different is the construction of a hermetic scroll compressor?

A: Unlike a conventional compressor unit, a hermetically sealed scroll compressor has both the motor and compressor coupled on a single shaft and placed inside an airtight welded steel shell. The construction of the hermetic scroll compressor is very compact and easy to fit inside other appliances. Hermetic compressors commonly exist as a part of refrigerator condenser units. The ones used in refrigerators are usually round-shaped and smaller in size than other compressors of similar capacity. Moreover, hermetic scroll compressors are available in single or multi-cylinder configurations. And, they have a built-in lubrication system that keeps the internal components running.

Q: What are the disadvantages of hermetic scroll compressors?

A: Hermetic scroll compressors are difficult to repair in case of failure. Because, the outer shell of hermetic compressors is usually welded together, and must be cut open. In the event of a failure, the whole unit has to be replaced. Hermetic scroll compressor can only operate with an electric power supply. So, it is not suitable for remote areas without electricity supply. A hermetic scroll compressor comes integrated into a system. So, if a burnout of windings happens, it could impact the entire system.

Q: How does a hermetic scroll compressor work?

A: A hermetic scroll compressor consists of two scrolls or spirals. One scroll is moving, whereas the second one is fixed (attached to the compressor body). The first scroll orbits (rotates) in a path defined by its mating fixed scroll. The orbiting scroll is connected to the compressor's crankshaft. As a result of the scroll's movement, gas pockets are formed between the two scrolls. At the outer part of the scrolls, the pockets suck in gas and then move towards the center of the scroll, where the compressed gas is discharged. As the gas moves into the continuously smaller internal pockets, both its temperature and pressure are increased. Thus a desirable discharge pressure is achieved by the motion of the compressor scrolls.

Q: What are the precautions for using a hermetic scroll compressor?

A: Selection of lubricating oil: When choosing lubricating oil, you should choose the appropriate oil brand, oil viscosity and oil specifications according to the use environment and standard requirements of the compressor. The quality of lubricating oil is directly related to the service life and efficiency of the compressor, and the lubricating oil should be replaced in time to ensure good working condition.
Operators should be familiar with the use methods and safe operating procedures, and use them strictly in accordance with the user manual and operating procedures. During daily use, regular maintenance and maintenance should be carried out to keep the equipment clean and hygienic, and avoid excessive vibration and wear of the equipment.
Regularly inspect and repair the compressor to ensure the normal use of the equipment. After every few thousand hours of use, inspection and cleaning must be carried out to ensure the normal operation of the compressor. For parts that need to be replaced, original parts or parts of equal quality should be used to ensure the long-term use of the equipment.

Q: Which safety requirements should we pay attention to when using hermetic scroll compressor?

A: Do not overload the compressor. Overloading will cause irreversible damage to the equipment and affect the performance and service life of the equipment.
When the equipment is running, attention should be paid to changes in temperature and pressure, especially in high temperature and high pressure environments. Equipment protection measures should be increased to reduce equipment repair costs and maintenance time.
The parts of the fully enclosed scroll compressor also need to be replaced and maintained regularly to avoid damage and failure.

Q: What are the factors that affect the efficiency of hermetic scroll compressors?

A: Gas composition
The efficiency of the hermetic scroll compressor is greatly affected by the gas composition. For the same operating parameters, the efficiency of the hermetic scroll compressor may be significantly different under different gas composition conditions. Among them, the specific heat capacity, molecular weight, viscosity coefficient and other factors of the gas are important factors affecting the efficiency of the hermetic scroll compressor. Under the same working conditions, the smaller the gas specific heat capacity, the larger the molecular weight, the higher the viscosity coefficient, the lower the efficiency of the hermetic scroll compressor.
Working condition parameters
The working efficiency of the hermetic scroll compressor is also closely related to the working conditions parameters. In most cases, the design power of a hermetic scroll compressor is related to the inlet flow, outlet pressure and rotor speed. In actual use, the inlet temperature, inlet pressure and outlet temperature of the hermetic scroll compressor will also have a greater impact on its efficiency.
Geometry structure
The geometry of a hermetic scroll compressor is also one of the important factors affecting its efficiency. The geometric structure mainly includes parameters such as the shape, slope and inclination of the inlet and outlet, guide vanes, impellers, stationary discs and other components. For the same operating parameters and gas composition, changes in geometric structure parameters will also have a greater impact on the efficiency of the hermetic scroll compressor.

Q: What are the energy-saving performance advantages of hermetic scroll compressors?

A: Efficiency: The working principle of the scroll compressor determines that it can efficiently compress air or gas during operation. Compared with traditional compressors, scroll compressors have stronger compression capacity and lower exhaust temperature, which can better ensure the efficient operation of the machine.
Controllability: The speed and compression capacity of the scroll compressor can be adjusted by different control methods. For example, in some environments where low load is required, energy consumption can be reduced by reducing the turbine speed and relative motion area. During peak loads, control measures such as increasing the turbine speed and relative motion area can ensure the efficient operation of the machine.

Q: What are the performance characteristics of hermetic scroll compressors?

A: High efficiency and stability: Hermetic scroll compressors have efficient gas compression capabilities, stable operation, and can work continuously for a long time.
Small size: Compared with other types of compressors, hermetic scroll compressors are small in size and occupy less space.
Low vibration: Hermetic scroll compressors vibrate less during operation and have almost no negative impact on the working environment.
Low noise: Hermetic scroll compressors make little noise during operation, which can reduce auditory interference for workers.
Simple maintenance: Hermetic scroll compressors are simple to maintain and have low maintenance costs because they do not have any mechanical contact points.

Q: How is the applicability of hermetic scroll compressors in low-temperature environments?

A: Low-temperature environments refer to environments where the ambient temperature is below 0°C. For some compressors that need to work in low-temperature cabins, their performance requirements must not only be met in traditional environments, but also require efficient working capabilities in low-temperature environments. Compared with traditional compressors, hermetic scroll compressors are relatively stable in low-temperature environments due to their compact structure and relatively few rotating parts, and are not prone to frost, freezing, and solidification. However, they need to be selected and adjusted according to specific working conditions. In low-temperature environments, the working efficiency of hermetic scroll compressors will gradually decrease as the ambient temperature decreases, so they need to be selected and adjusted according to specific working conditions. In addition, the cooling system of the hermetic scroll compressor needs to be optimized so that it can perform better at low temperatures.

Q: What is the reason for the overheating of the hermetic scroll compressor?

A: Condenser blockage: The condenser is a key component in the hermetic scroll compressor condensation circuit. When there is too much dirt inside or the channel is blocked, the compressor exhaust temperature will rise and cause overheating.
Heat exchanger failure: The heat exchanger is also a key component in the hermetic scroll compressor condensation circuit. If there is sediment or blockage in the internal pipeline of the heat exchanger, the heat exchange efficiency will decrease, which will cause the compressor to overheat.
Incomplete refrigerant recovery: If there is still a certain amount of refrigerant residue in the compressor exhaust pipeline, these residues will cause friction inside and outside the compressor, causing the exhaust temperature to rise.
Oil circuit abnormality: If the hermetic scroll compressor oil circuit is abnormal, resulting in poor lubrication or too low oil level, it will increase friction and internal loss, causing the compressor to overheat.
Compressor design problems: In some extreme cases, such as unreasonable compressor design and mismatched supporting equipment, overheating will also occur.

Q: How to solve the problem of hermetic scroll compressor overheating?

A: Regularly clean and maintain the compressor and peripheral equipment (such as condensers, heat exchangers, etc.) to avoid dirt and blockage.
Regularly perform refrigerant recovery and refilling work, and maintain a good refrigerant environment.
Follow good compressor oil circuit maintenance and care procedures to ensure that the oil circuit is unobstructed and the oil level is sufficient.
Adjust the working conditions of the hermetic scroll compressor according to actual conditions (such as adjusting the temperature and pressure of the condenser, etc.).
If necessary, replace equipment with unreasonable design or mismatched matching.

Q: How to choose the installation location of the hermetic scroll compressor?

A: The installation location of the hermetic scroll compressor needs to consider many factors, such as noise, air flow and cooling. When choosing the installation point, it is necessary to ensure that the surrounding environment is safe and convenient for inspection and maintenance. At the same time, factors such as the location of the gas inlet and outlet and the direction of the oil circuit need to be considered to ensure the normal operation of the hermetic scroll compressor.

Q: What should be paid attention to when wiring the electrical connection?

A: When wiring the electrical connection, it is necessary to strictly follow the electrical wiring diagram provided by the manufacturer. Before wiring, it is necessary to check whether the voltage, frequency and other parameters of the equipment and power supply match to avoid equipment damage and safety accidents.

Q: What should be prepared before installing the hermetic scroll compressor?

A: Check whether the hermetic scroll compressor is intact, whether all parts are complete and take protective measures.
Clean the cooling system, oil circuit and other parts of the hermetic scroll compressor to ensure that they are clean and pollution-free.
Check whether the parts of the hermetic scroll compressor are falling off or damaged.
Determine the installation location of the hermetic scroll compressor, and then prepare for fixing and connection.

Q: How to install a hermetic scroll compressor?

A: First, select the appropriate bracket and expansion bolts to install the hermetic scroll compressor in the predetermined position. Secondly, connect the gas inlet and outlet, cooling system and oil circuit according to the installation drawings. Next, connect the power cable, perform electrical wiring and grounding. Finally, check the entire installation process to confirm that the hermetic scroll compressor is firmly fixed and the power line is stable and reliable.

Q: What needs to be checked when debugging a hermetic scroll compressor?

A: Check whether the hermetic scroll compressor is installed correctly and turn off the compressor's cooling system.
Check whether the hermetic scroll compressor oil is sufficient, turn on the power of the scroll compressor and start it, and then turn on the cooling system.
Debug the hermetic scroll compressor, adjust the parameters such as the outlet pressure and flow of the hermetic scroll compressor, and ensure the normal operation of the equipment.

We're professional hermetic scroll compressor manufacturers and suppliers in China, specialized in providing high quality products with competitive price. We warmly welcome you to buy cheap hermetic scroll compressor in stock here from our factory.

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