In an open refrigeration compressor, the motor and the compressor are separated. The compressor drive shaft is connected to the motor by a coupling sleeve or by a belt and pulleys. As such you can use different types of motors (electric, diesel, gas, etc.) according to your needs.
These refrigeration compressors are therefore not known for being compact, they are mainly used for high power. The power can be adjusted in several ways:
' by stopping some cylinders on multi-piston compressors
' by changing the speed of the drive motor
' by changing the size of any pulleys
Another advatange is that all parts of the compressor are accessible for repair, unlike hermetic refrigeration compressors.
The main disadvantage of this type of refrigeration compressor is the presence of a rotating seal on the compressor shaft which can become a source of refrigerant leakage with wear.
In a hermetic refrigeration compressor, the electric motor and compressor part are enclosed in a hermetically welded envelope.
The main advantage to a hermetic refrigeration compressor is its sealing system which is ensured by the enclosed envelope and does not depend on the state of one or several joints (i.e. the rotating shaft seal for example).
But this system does not only have advantages: the cooling of the motor is ensured by the refrigerant fluid bathing the inside of the casing which heats the fluid and is detrimental to the refrigeration cycle. In principle, the cooling capacity cannot be adjusted, except by varying the frequency of the supply current.
Another disadvantage is that it is impossible to open the enclosed envelope to make any repairs and as such if something stops working the whole refrigeration compressor must be replaced. Luckily, this system is fairly affordable.
Hermetic refrigeration compressors are reserved for low and medium power requirements.
Semi-hermetic refrigeration compressors are a compromise between open and hermetic refrigeration compressors.
As in a hermetic refrigeration compressor, the motor and compressor part are enclosed in a hermetic envelope, but this envelope is not welded and all parts are accessible for repair.
The motor can be cooled by the refrigerant or, in some cases, by a liquid cooling system integrated into the casing.
The sealing system is thus better than on an open refrigeration compressor as there is no rotating seal on the transmission shaft. There are still static seals on the removable parts however and the sealing is therefore not as complete as on a hermetic refrigeration compressor.
Semi-hermetic refrigeration compressors are used for medium power requirements, and while they offer the economic advantage of being repairable, they cost significantly more than hermetic refrigeration compressors.
Piston refrigeration compressors are the most common on the market, they can be found in all configurations (open, hermetic and semi-hermetic) and for all power levels, from the lowest to the highest.
A piston refrigeration compressor needs to be constantly lubricated and is very sensitive to the presence of liquid at the inlet, which can cause the destruction of the valves.
Compared to other technology, piston refrigeration compressors are more compact and affordable, but they also have the least powerful technology.
Spiral refrigeration compressors, also called scroll refrigeration compressors, are made up of two spiral-shaped rollers. One of the spirals is fixed while the other traces an eccentric and orbital movement without rotation that moves the refrigerant to the center of the spiral while reducing its volume.
The main advantage of spiral refrigeration compressors is the reduced number of parts compared to piston refrigeration compressors, which means better output. This type of compressor imposes less torque variations on its engine, which increases its reliability and it is also less sensitive to the presence of liquid at the inlet.
It is limited in power (40-50kW) but several compressors can be combined in parallel to obtain a higher level of power, reaching up to 300-400kW.
Spiral refrigeration compressors are quieter than piston ones and they are used in many air conditioning systems and modern refrigerators.
In a screw refrigeration compressor, the refrigerant is compressed by a helical screw rotating at high speed. There are two configurations: single-screw compressors and twin-screw compressors.
These refrigeration compressors give excellent output and their power range is between 20 and 1,200kW. They also have excellent product life and are extremely reliable but they must be lubricated correctly to ensure the sealing between the moving parts, to reduce noise and cool down the refrigerant.
Among their disadvantages, it can be noted that screw refrigeration compressors are more expensive and take up more space than piston refrigeration compressors.
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In the ever-evolving world of refrigeration, the compressor stands as the heart of any cooling system. Selecting the right compressor brand is crucial for efficiency, reliability, and sustainability. With the global shift towards environmentally friendly solutions, eco-friendly refrigerants like R290 are gaining prominence. This article delves into four major compressor brands'Embraco, Donper, Secop, and Cubigel'and explores the advantages of using R290 refrigerant in today's market.
For more on Skadi Refrigeration's product quality and eco-friendly initiatives, visit our Quality Page.
Originating from Brazil, Embraco is a leading brand known for its focus on energy efficiency and eco-friendly technologies. The company excels in inverter technology and natural refrigerants like R600a. Embraco compressors are widely used in both household and commercial refrigeration applications, offering high performance and low noise levels.
Discover how Skadi integrates high-performance compressors like Embraco for superior efficiency on our Product Page.
As a prominent Chinese compressor supplier, Donper has made a name for itself with cost-effective and durable products. Catering to both household and small commercial refrigeration markets, Donper compressors are ideal for budget-conscious consumers who do not want to compromise on reliability and efficiency.
Originally a Danish brand now integrated into a German enterprise, Secop specializes in compressors for household and commercial use. The company is renowned for its technological innovation, emphasizing low noise and environmental sustainability. Secop has made significant strides in DC compressor technology and offers a range of energy-optimized models.
Based in Spain, Cubigel focuses on small-scale commercial compressors suitable for the food and beverage industry, retail, and other light commercial refrigeration needs. Their products are known for flexible design and high performance, making them ideal for diverse small-scale applications.
Learn more about our versatile Cubigel-compatible products on our Product Page.
R290 refrigerant, also known as propane, boasts a low Global Warming Potential (GWP), making it an eco-friendly alternative to traditional refrigerants. Its adoption aligns with increasingly stringent environmental regulations worldwide.
R290 has excellent thermodynamic properties, offering superior heat transfer efficiency. This results in lower energy consumption and more stable cooling performance, essential for both commercial and household applications.
For additional details on Skadi's commitment to sustainable practices, please visit our About Us Page.
While R290 is flammable, advancements in compressor technology have mitigated safety concerns. The four major brands have implemented robust safety features and adhere to international standards to ensure secure operation in various settings.
Embraco offers R290-compatible compressors like the EM and NE series. These models deliver high efficiency and low noise, suitable for commercial refrigerators and household freezers. Their advanced technology ensures optimal performance while minimizing environmental impact.
Donper's R290 compressor models, including the K400CU and NBCU series, provide stable performance with an emphasis on cost-effectiveness and reliability. These compressors are ideal for commercial refrigerators, display cases, and cooling machines.
Secop's NLE and SCE series are designed explicitly for R290 applications in commercial refrigeration equipment. These compressors excel in energy efficiency and are well-suited for beverage coolers, ice cream display cases, and medical refrigeration units.
Cubigel offers compact R290 compressors perfect for small commercial equipment like beverage coolers and display cabinets. Their designs are flexible, allowing for easy integration into various applications while maintaining high efficiency.
To see more about these compressor models, check out our latest offerings on the Product Page.
Choosing the right compressor depends on your specific requirements:
Find detailed product specifications that fit your project on our Product Page or contact us directly through the Contact Us Page for guidance.
The refrigeration industry is moving towards digital controls and IoT integration, enhancing system efficiency and monitoring capabilities. R290 refrigerant is expected to see increased adoption due to its environmental benefits and regulatory support. Innovations in compressor technology will continue to address safety concerns, improve energy efficiency, and meet the evolving demands of the market.
In summary, Embraco, Donper, Secop, and Cubigel each offer unique advantages tailored to various refrigeration needs. The eco-friendly R290 refrigerant stands out for its low environmental impact and high efficiency. As you navigate your options in , consider these brands and the benefits of R290 to find the optimal refrigeration compressor solution for your business.
For further insights on sustainable refrigeration solutions, please visit our News Page, or reach out to our expert team through the Contact Us Page for assistance.
Even though we won't be attending Vietnam FoodExpo, we're excited to announce that we'll be exhibiting at HotelEx SHENZHEN from December 12-14, . We warmly invite you to visit our booth, meet our team, and explore tailored solutions to support your business growth.
If you are looking for more details, kindly visit refrigeration compressor manufacturers.