The small compressor cooling system is the ” core” of micro refrigeration industry.  MOIR has engineered and delevoped  an array of small refrigeration units with unpararelled efficiency and reliability that are powered by our devoted compressor families. 

The develop of the cooling units helps customers benefit from opportunities of mobile or portable refrigeration technology, and satisfy the growing requirements of many challenging applications in a wide of industries. Nowadays, the compressor-based cooling sytems has cover the markets including small chillers units, air conditioning units and commercial refrigeration units etc. 

MOIR’s compact cooling system is sort kinds of  water-chilled systems, air-chilled systems, and dc condensing units ( also known as direct refrigerant system) . It consists of miniaturized rotary compressor , R134a/R290 refrigerant, small condenser, metering device(callipary), copper coil evaporator, filter drier,  controller, and other refrigeration parts. Basically, the first 4 components are agreed as the fundamental ones of a basic cycle. 

Now let’s get a bold idea and see how the 4 components help execute refrigeration cycle job. 

4 Key Components of a Small Compressor Cooling System

1. Miniature Rotary Compressor 

Miniature compressor is defined as a refrigeration compressor with a cooling capacity of less than 1KW. It’s the heart of the micro cooling system, powering the refrigeration circulation.

Generally, the rotary compressors and reciprocating compressors are the most kinds refrigeration compressors used in refrigeration systems.   MOIR’s compressor is a new type of variable speed, blushless motor dc rotary compressor. It represents the smallest, less-weight, high efficiency and high reliability compressor for a portable and compact thermal managment solutions. 

2. Condenser (Heat Rejector)

The condenser, or condenser coil, is a type of heat exchanger used in the refrigeration loop.  It is installed on the high-pressure side of the system. This components condenses the hot gas into liquid phase by releasing heat to the cooling medium( water or air).  It can be considered a heat rejector in the small refrigeration system. 

3. Metering Device- Capillary ( Heat Dropper)

The metering device plays a role as throttle and depressurization.  When the high warm pressure liquid refrigerant flowing through the throttling pipeline, the pressure is dropped to a low pressure and temperature which is typically below ambient temp because of the obstruction loss.

The common type of metering device are capillary, thermal expansion valve, and electric expansion valve. The capillary has no regulating function, while the others can adjust the flow of refrigerant into the evaporator of the compact mobile cooling system. 

4. Evaporator (Heat Absorbor)

Evaporator is the other heat exchanger in the miniature refrigeration systems which is located in the low-pressure side of the system. When liquid refrigerant at low temperature enters into evaporator,  the heat exchange with outside air is carrid out here.   It absorbs heat from the space to achieve the refrigeration effect.

The Working Principle of Small Compressor Cooling System

Since now we know that the major components of a vapor compression refrigeration system are the mini compressor, condenser, capillary, and evaporator. They are the ones that generate the satisfactory refrigerarion loops.  Refrigeration circulation is a process which uses physical phase change and heat transfer.  

Now, we’d like to run you through the complete and systematic way of the refrigeration cycle in 4 steps.

Step 1: Compression 

The compressor is the most important part, which is usually considered as the main engine in the cooling system.  The mini rotary dc compressor uses a small amount of energy to take in a low temp, low pressure refrigerant vapor from the evaporator(heat exchanger) and compress into a high temperature, high pressure vapor.  

Step 2: Condensation

This hot vapor enters the condenser. As the ambient temperature is lower than the vapor flowing into, the condenser enables the refrigerant to release the heat. As the temperature of the gas drops, it condenses into liquid phase since the heat has fallen below its boiling point. 

Step 3:  Metering and Expansion

The high pressure, warm temperature liquid refrigerant exits the condenser and enters the capillary tube, where it undergoes a pressure drop casuing some of the hot liquid to vaporize, lowering the temperature of the refrigerant. At the exit of the capillary tube, the refrigerant is throttled to a low temperature to phase flow. 

Step 4:  Evaporation

This two phase flow enters the evaporator(cold heat exchanger) where it is exposed too the heat source. The low temperature liquid absorbs the heat from the heat source where the hot space or equipment need cooling. 

The low temperature, low pressure refrigerant is sucked into the compressor and the refrigeration cycle start again. 

Conclusion

To provide a little more practical area ideas that are more, maybe universal that you can utilize in a lot of different types of systems, there are some things you want to memorize with the basic refrigeration circuit.  In the micro refrigeration unit, you can think of the compressor as the pressure increase, the condenser as the heat rejector, the capillary or expansion valve as the pressure dropper, and the evaporator as heat absorber. 

The miniatured cooling system ensures an excellent combination of low environmental impact and maximum performance, ideal for installation in confined space and mobile vehicles where weight and space is crucial. 

About Moir Cooling Service

More than just a supplier, MOIR is your all-round partner in small thermal solutions. We take the time to understand your requirement, challenges, and the changing needs of your market to create a custom cooling solution.

Our Specialties and Solution Portfolio:

• Compact Cooling Solutions: From chilling individual electronics to optimizing entire systems, we excel at meeting your expectations.
• Turn-key Custom Services: From designing, and engineering, to manufacturing, we craft custom solutions that precisely match your unique demands
• Liquid & Air Chilled Expertise: Skilled in both air and liquid cooling systems, covering all bases
• Cutting-Edge Thermal Devices:  Embark on the journey of state-of-the-art thermal technology with us.
• Innovative Mechanical Packaging: Our creative minds are at your service for the most efficient, compact, and sustainable packaging designs.

Today we continue to develop our solution and our people in the same innovative way. We will continue our focus on this lead segment within compact & mobile cooling.