Liquid Chiller cooling refers to cooling by means of the convection or circulation of a liquid. It is a method of heat removal from components and devices. As opposed to air cooling, liquid is used as the heat conductor.

Usually, water is the best best heat conductor. Water cooling is commonly used for cooling precise instrument, laser, lab test. Recently, small water chiller also is used for various major components cooling.

For example, it is applied to inside high-end personal computers such as CPU, GPU, and motherboards. The main mechanism for water cooling is convective heat transfer. It includes:

• Water cooling  
• Liquid cooling for computers
• Cooling by convection or circulation of coolant
• Liquid Cooling and Body Vest Cooling
• Laser and Precise Instrument Cooling

RIGID liquid chiller module is an integrated cooling sub-system. It is specially used for small footprint cooling applications where space and weight are critical.

The LCM includes Miniature Compressor, Driver Board, Condenser, Evaporator and other small cooling parts. It provides core cooling and refrigerant control mode is capillary tube. This subsystem is full charged with R134a and oil and ready to use. It allows end users to adapt to the coolant fittings for ultimate flexibility.

RIGID liquid chiller module is world’s lightest weight and very compact footprint. It particularly designed for small liquid circulatory cooling, such as laser manufacturers, laboratory, hospital lab, large end users and system integrators.

RIGID patent mini dc compressor drives the refrigerant directly through the heat exchangers. This concept eliminates the need for a water cooling loop (water pump, reservoir and associated tubing) resulting in a greatly simplified cooling system.

RIGID liquid chiller module is an integrated cooling sub-system. It is specially used for small footprint cooling applications where space and weight are critical.

The LCM includes Miniature Compressor, Driver Board, Condenser, Evaporator and other small cooling parts. It provides core cooling and refrigerant control mode is capillary tube. This subsystem is full charged with R134a and oil and ready to use. It allows end users to adapt to the coolant fittings for ultimate flexibility.

RIGID liquid chiller module is world’s lightest weight and very compact footprint. It particularly designed for small liquid circulatory cooling, such as laser manufacturers, laboratory, hospital lab, large end users and system integrators.

RIGID patent mini dc compressor drives the refrigerant directly through the heat exchangers. This concept eliminates the need for a water cooling loop (water pump, reservoir and associated tubing) resulting in a greatly simplified cooling system.

To meet the growing demand of small cooling systems, RIGID has developed compact liquid chiller modules for several customers. At first, these compact cooling modules are used for portable and compact water chiller and small device cooling.

Later, They are widely used in medical, aesthetic, laboratory, military who expressed a need for a compact, lightweight liquid chiller, which would meet the environmental stresses of the harshest environments while still provided sufficient cooling or heating. The system has both heating and cooling capabilities and circulates thermally regulated (+/- 0.5°C) coolant to a customer cold plate or heat exchanger.

The system has a built-in pump and reservoir to circulate the coolant, which allows system to function without the use of a fill kit. The system also has a communication port which allows the user to monitor the system performance and choose the operating temperature.

The compact design gives the user flexibility to design this chiller into their system or have is reside as a separate unit. Also, the cold plate, which ultimately removes heat from the payload, can exist remotely from the chiller and can be designed as appropriate.

The chiller has been designed to meet the requirements of mobile applications where it may besubjected to shock, vibration, and a variety of environmental conditions.

There are 5 types of RIGID small cooling units, they are:

1. Coil type liquid chiller
2. Plate type liquid chiller
3. Coaxial typle liuqid chiller
4. DC Condensing unit
5. Micro DC Aircon unit

RIGID Liquid Chiller Modules feature refrigerant delivered directly to a liquid loop. minimzing part count and maximizing thermal efficiency.

1.     DC pumps and reservoirs
2.     100-550 Watts of cooling
3.     Liquid temperature ranges: 25°C to -20°C
4.     Temperature control
5.     Efficient isothermal heat transfer
6.     4x to 6x more efficient than thermoelectrics
7.     Hermetically sealed system - no water leaks
8.     >90,000 hour MTBF

Cooling Capacity
This is usually defined as the specified nominal cooling capacity at normal working conditions of the system in watts, according to evaporating and condensing temperatures. The capacity is determined by the mass flow rate of refrigerant, which depends on the condensing unit compressor’s displacement, RPM, and volumetric efficiency. RIGID compact liquid chiller module refrigeration capacity ranges from 30W to 250W.

Refrigerant Type
Refrigerant selection can be made on the basis of availability, performance, and ecological considerations. RIGID liquid chiller module has been verified for use with R134a refrigerant.

Ambient Temperature

RIGID liquid chiller modules are usually intended for indoor use, and a minimum of +5ºC is required in order for proper lubrication. In 2017, RIGID has successfully developed T-tropical series mini compressor, which is able to work in 52 degree ambient temperature.

Electrical Power Available
RIGID liquid chiller modules are used in mobile or portable refrigeration systems. Its DC power is produced by batteries, fuel cells, vehicle alternators, solar panels, or from an AC inverter power supply. The compressor must be selected for use according to the DC voltage available. RIGID compressors are available in 12V, 24V and 48V versions.

Size and Cooling
RIGID liquid chiller modules are extremely small, high-performance for end users direct refrigeration devices. Its size is only 7.85x6.3x6.7 inch and weighting only 6.6 lbs. Current models produce as much as 30W to 250W.

RIGID Small Cooling Systems deliver coolant to a secondary evaporator or heat exchange. The small chiller systems offer ultimate high thermal performance and ultimate flexibility.

1. 100 to 550 W of cooling
2. 0.1°C temperature control
3. 4x to 6x more efficient than thermoelectrics
4. Stand alone or integrated solutions
5. Customized service is available
6. >90,000 hours MTBF

RIGID liquid chiller systems offer high heat transfer rates because the R134a refrigerant has a high thermal conductivity and heat-absorption capacity. Our liquid chiller systems are quite compact because of our patent miniature dc compressor. The mini compressor circulates R134A refrigerant which takes away heat from heat source dramatically.

RIGID liquid chillers are ideal for cooling high heat flux components and in applications where a solution must be rugged and reliable. It is also a better cooling solution for small liquid cooling where space and weight are critical fators.

Rigid circulatory liquid chiller modules are self-contained high-efficient refrigeration compressor with R134A coolant, smallest condenser and evaporator, filter drier and driver board etc. All these refrigeration parts are all well integrated in one unit, sophisticated design by our skilled engineers. It serves as a source of chilled water for circulation through the water pipes, and the unit has smallest footprint and weight make it portability.

• Extremely small
• Extraordinary cooling performance
• Available for 12V, 24, 48V DC power supply
• Compact design providing reliable results to cooling and refrigeration
• Small & light weight configuration is ideal for small refrigeration application
• Variable speed dc compressor operate in battery, vehicle or solar power

RIGID compact & mobile cooling chiller module (also named Liquid Chiller Module), is also used for extreme hot environment and confined space, besides small cooling devices and equipment. After more than 8 years experience for small dc refrigeration system. RIGID has successfully engineered and developed sophisticated cooling systems to handle OEM and ODM project.

In 2017, RIGID introduced a powerful and compact plate type liquid chiller, which meets market's need for personal cooling in the race car industry. Temperatures on the track can reach over 60°C (140°F) and the drivers need to operate their car precisely in these extreme conditions. The size of RIGID's compressor keeps the cooling system lightweight. The efficiency of a vapor-compression solution, yields a great advantage over thermo-electric personal cooling systems.