What is an Oil Separator?
An oil separator in refrigeration and HVAC systems is a device that separates refrigerant oil from refrigerant. It is usually a round tank made of steel.
It is used to collect the refrigerant oil that the refrigeration compressor throws out of the crankcase, if you don’t understand how a compressor works, check out how a refrigeration compressor works.
Different types of compressors work with different amounts of oil injection, see Compressor Types to learn more.
Scroll compressors have the smallest amount of oil injection and screw compressors have the largest amount of oil injection.
An oil separator is a device that collects the refrigeration oil that is ejected from the compressor and returns it to the compressor.
How Does an Oil Separator Work in a Refrigeration System?
The oil separator is to ensure that the compressor has sufficient lubricating oil.
When the compressor is working, the refrigerating oil and refrigerant mixture come out from the compressor outlet and then enter into the oil separator from the inlet.
When it enters, it will go through a filter and baffle, then the clean oil will drop down to the bottom of the oil separator and the gas refrigerant come out from the outlet.
(As shown in the picture, the oil inlet and outlet are at the top and the oil return port is at the bottom).
In the bottom of the oil separator, there is a float ball and needle valve, when the oil is much enough in the bottom to reach the settled line, the valve will open to let the oil return to the compressor.
(If the pressure in the oil separator is higher than the compressor crankcase, the oil will rapidly return to the compressor).
When the oil level drops, the valve will close to prevent the refrigerants from returning to the compressor.
In conclusion, the float ball valve controls the oil return device, the float ball is installed at the bottom of the oil separator, and the high and low-pressure difference principle completes the whole oil return.
What Types of Oil Separators in Refrigeration and HVAC Systems?
Before you learn about the types of oil separators, you need to check the Refrigeration Oil Separator pages, there are a full series Rof efrigeration Oil Separators.
Hermetic Oil Separator-The closed oil separator is not repairable. It has no maintenance port when it leaves the factory and cannot be opened.
Hermetic Oil Separator is usually used in small refrigeration systems, such as single compressor refrigeration systems.
We can provide you with a customized hermetic oil separator
For detailed specifications, please kindly download our E-catalogue and check, or contact us directly.
A demountable oil separator is also called a flange-type oil separator because it has a demountable flange on the top.
Demountable oil separator has the advantage of being washable, it is mostly used in heavily soiled refrigeration systems, such as refrigeration and HVAC systems with a lot of welded joints.
Centrifugal oil separator(with reservoirs)-The Centrifugal oil separator has been specially developed for screw compressors and is characterized by its ability to withstand high loads. It has a maximum flow rate of 200.6 m³/h.
Shunt Helical Oil Separator-The Shunt helical oil separator usually consists of several helical disks, so that it separates the refrigerant more smoothly. Therefore it also has the highest oil and gas separation efficiency.
Miracle shunt helical oil separator is characterized by corrosion resistance, the float needle valve is not easy to jam, timely oil return, and customized type, and size according to your request.
If you need the shunt helical oil separator, please contact us now.
Helical Oil Separator-The helical oil separator is a spiral rotation and high-efficiency oil separator, it separates the refrigerating oil and refrigerants by centrifugal force caused by spiral rotation.
It can separate the refrigerating oil and refrigerants most effectively, It can achieve 99% efficiency as long as you choose the right helical oil separator for your system.
A helical oil separator is designed for piston compressors.
Oil Storage Separator-Oil Storage Separator is designed with oil separation and oil storage together, they are divided into different chambers inside.
The Oil Storage Separator is used in refrigeration units, e.g. semi-hermetic compressors, piston compressors, etc.
It is suitable for low-pressure oil management systems.
Miracle has different types of oil storage separators, including the helical oil separator with receiver, and centrifugal oil storage separator.
If you need to, please contact us today.
What is the Function of an Oil Separator in Refrigeration?
The oil separator’s function is to separate the oil from the hot refrigerants.
Protect the compressor, and prevent the compressor’s lack of oil.
Prevent the oil block to decrease the efficiency of the refrigeration system.
Its main function is to separate the refrigerants and refrigerating oil and let the refrigerating oil go back to the crankcase automatically.
Ensuring the compressor won’t lack refrigerating oil, achieves the best cooling function.
Why Do You Need an Oil Separator in a Refrigeration System?
When the compressor is operating, during the discharge outlet of the compressor, the refrigerants normally take out some refrigerating oil.
If the loss of refrigerating oil is too much, the oil can’t be returned to the compressor, it will be harmful to the compressor.
In addition, refrigerant oil is transferred into the condenser.
This causes a reduction in the heat transfer efficiency of the condenser.
To prevent a large amount of refrigerant oil from flowing into the refrigeration system, which affects the heat dissipation of the condenser and the cooling effect of the evaporator.
Therefore, it is necessary to install an oil separator between the compressor and the condenser.
In order to better realize the oil return the refrigeration system, usually also needs a refrigeration oil reservoir, oil level control, oil filter, and differential check valve to realize the efficient oil return.
Refrigeration Oil Separator and Refrigeration Unit
Check out the different types of refrigeration units to help you better understand the Refrigeration Oil Separator.
Miracle has 30 years of experience manufacturing refrigeration units, whether you need an oil separator, refrigeration unit, or a custom condenser, we can meet your needs. Please send your drawings now.
Refrigeration oil separator for walk-in cooler condensing unit
Refrigeration oil separator for monoblock refrigeration unit
Refrigeration oil separator for horizontal condensing unit
Refrigeration oil separator for Bitzer condensing unit
Refrigeration oil separator for Copeland Condensing Unit
Refrigeration oil separator for Danfoss Condensing Unit
Refrigeration Oil Separator Manufacturers
Danfoss oil separator
BITZER oil separator
Parker oil separator
GVN oil separator
Dryall oil separator
Sporlan oil separator
Why Miracle Refrigeration and HVAC Oil Separator?
Miracle oil separator has a wide range of applications, they can be used in refrigeration, air conditioning, heat pumps, drying, transportation refrigeration, railroad transportation, and so on.
In addition, our oil separator has passed CE, UL, ISO9001 certificates, etc.
We adopt the high-quality needle valve and float ball to ensure high efficiency for oil separation and oil return.
Making sure no oil returns when the valve closes, and no block when the valve is open.
We have 30 years of refrigeration manufacturer experience.
So we can not only provide you with an oil separator that can replace Emerson/Danfoss/Parker/Sporlan, but also provide you with professional technical support. Send your inquiry now.
If you need it, please check the refrigeration oil separator.