Mini Water Chiller

RIGID Mini Water Chillers are compact, compressor-based liquid cooling modules designed for equipment requiring active temperature control in a limited installation space.

Powered by variable-speed BLDC miniature rotary compressors, RIGID's mini chillers are available in 12V, 24V and 48V DC configurations for battery-powered, portable and embedded OEM applications.

The DV19-series combines a miniature compressor, air-cooled condenser, expansion device and liquid evaporator into a compact refrigeration assembly. It removes heat from circulating water or compatible coolant and rejects that heat to the surrounding environment.

• Compare 12V, 24V and 48V DC Mini Chillers

Specification DV1910E-P-S DV1920E-P-S DV1930E-P-S

Rated DC Voltage 12V 24V 48V

Compressor QX1901VDL QX1902VDL QX1903VDL

Compressor Type BLDC rotary BLDC rotary BLDC rotary

Nominal Capacity 450W 450W 450W

LBP Capacity 130W 130W 130W

Working Current 1–8A 1–7A 1–4A

Maximum Current 10A 8.5A 7.5A

Refrigerant R134a / R290 R134a / R290 R134a / R290

Dimensions 200 × 230 × 148 mm, 200 × 230 × 148 mm, 200 × 230 × 148 mm

Weight 3.0 kg 3.0 kg 3.0 kg

Important: The 450W compressor-class figure and 130W LBP figure refer to different rating contexts. Neither should be used as a guaranteed cooling capacity at an unspecified coolant temperature.

• DV1910E-P-S — 12V Mini Water Chiller

A compact 12V liquid cooling module for battery-powered instruments, portable medical equipment, vehicle-supported devices and mobile OEM applications.

Best for: Equipment with an existing 12V DC supply and a small circulating-liquid cooling loop.

• DV1920E-P-S — 24V Mini Water Chiller

A miniature 24V refrigeration module for industrial instruments, laser cooling, laboratory equipment, medical systems and other 24V-powered OEM devices.

Best for: Equipment using a regulated 24V DC electrical architecture.

• DV1930E-P-S — 48V Mini Water Chiller

A compact 48V liquid cooling module for telecom, industrial electronics, battery-powered systems and specialized OEM thermal management.

Best for: Equipment with an existing 48V DC bus.

Compact Vapor-Compression Cooling for Space-Constrained Equipment.

When a device generates more heat than passive cooling can remove, a miniature compressor-based liquid chiller provides an active method of transferring heat away from the equipment.

RIGID Mini Water Chillers are designed for OEM products requiring a combination of compact dimensions, low-voltage DC operation and controlled liquid cooling.

• Compact Refrigeration Architecture

The miniature BLDC compressor and integrated heat exchangers provide a compact refrigeration module for installation inside equipment or portable enclosures.

• 12V, 24V & 48V DC Operation

Select the chiller voltage according to the host equipment's electrical architecture. Suitable applications include battery-powered instruments, mobile equipment and regulated DC systems.

• Variable-Speed BLDC Compressor

Electronic compressor speed control allows refrigeration output to be adjusted according to thermal demand, within the compressor's approved operating envelope.

• Liquid Cooling for Remote Heat Sources

A circulating coolant loop transfers heat from the payload to the chiller, making liquid cooling suitable for lasers, cold plates, medical devices and electronics.

• OEM-Ready Integration

RIGID can evaluate modifications to coolant connections, evaporator design, condenser layout, controller interface and mechanical packaging for application-specific requirements.

Compact Compressor-Based Liquid Refrigeration.

A RIGID Mini Water Chiller uses a vapor-compression refrigeration circuit to absorb heat from circulating coolant.

The refrigeration cycle consists of four principal components:

1. Miniature BLDC Compressor

Compresses refrigerant vapor and circulates refrigerant through the refrigeration circuit.

2. Air-Cooled Condenser

Rejects the absorbed heat and compressor input energy to the surrounding air.

3. Expansion Device

Reduces refrigerant pressure before the evaporator.

4. Liquid Evaporator

Transfers heat from the circulating coolant into the refrigerant.

The coolant loop operates separately:

Chiller → Coolant Pump → Equipment Cold Plate or Heat Source → Chiller

Depending on the product configuration, the coolant pump, reservoir and external piping may be supplied separately or integrated into the OEM system.

The condenser must have adequate airflow and ventilation to reject heat effectively.

Cooling capacity is not determined by compressor displacement or nominal compressor wattage alone.

The complete mini water chiller's available cooling capacity depends on:

• Coolant inlet and outlet temperatures
• Required heat removal in watts
• Coolant flow rate
• Evaporating temperature
• Condensing temperature
• Maximum ambient temperature
• Compressor speed
• Heat-exchanger performance

For example, a compressor rated at approximately 450W under one test condition may provide substantially less capacity in a low-temperature refrigeration application.

RIGID publishes an approximately 130W LBP rating for the listed DV19-series modules. This should be presented alongside its corresponding evaporating and condensing temperatures once confirmed.

It maintains a stable temperature between -4°F and 68°F (-20°C to +20°C).

It features RIGID’s BLDC miniature compressor, known for high efficiency, low vibration, and long lifespan.

Yes. RIGID offers full OEM and ODM customization including size, capacity, power, and control options.

It’s widely used in medical, laser, laboratory, electronics, robotics, battery cooling, and aerospace applications.

Its variable-speed BLDC compressor (2,000–6,500 rpm) adjusts power automatically to match the load, improving energy efficiency.

Yes. Vapor-compression refrigeration can cool liquid below the surrounding ambient temperature when the system is designed for the required operating conditions.

For below-ambient applications, engineers should consider:

• Condensation and dew point
• Insulation of coolant lines
• Coolant freezing point
• Glycol or other compatible coolant mixtures
• Evaporator icing protection
• Minimum approved compressor operating conditions

Do not interpret the published temperature range as guaranteed cooling capacity across that entire range. Actual capacity must be checked at the requested coolant and ambient temperatures.

Medical Device Cooling: Compact liquid refrigeration for medical equipment, diagnostic devices, treatment systems and other instruments that require controlled heat removal.

Engineering priorities: Coolant compatibility, temperature requirements, operating environment, system reliability and integration dimensions.

Laser Cooling: Miniature liquid cooling for laser modules, optical assemblies and laser cold plates.

Engineering priorities: Laser heat load, coolant inlet/outlet temperatures, flow rate and required temperature stability.

Electronics & Semiconductor Cooling: Liquid cooling for power electronics, analytical instruments, test equipment and compact electronic assemblies.

Engineering priorities: Component heat generation, cold-plate design, coolant flow and condensation prevention.

Battery & Mobile Equipment Cooling: DC-powered liquid cooling for battery systems, robotics, mobile devices and portable equipment.

Engineering priorities: Electrical input, battery runtime, maximum ambient temperature, heat load and mechanical installation space.

Laboratory & Scientific Instruments: Compact liquid temperature control for laboratory analyzers, optical instruments and experimental equipment.

Engineering priorities: Temperature requirements, coolant material compatibility, continuous operating load and mechanical integration.

It uses a closed-loop liquid cooling system to transfer heat effectively from equipment to water.

Yes. Its DC power design makes it compatible with battery packs, solar panels, and other mobile energy sources.

The integrated drive board allows users to adjust compressor speed and cooling power easily via control signals.

It includes over-current, over-temperature, and low-voltage protection, ensuring safe and stable operation.

Yes, R290 is a natural, eco-friendly refrigerant with excellent thermal performance and low global warming potential (GWP).

Yes, but it should be placed in a well-ventilated and protected enclosure to ensure durability and stable performance.

Typically 2~4 weeks for standard models; customized solutions may take longer depending on specifications.

Need a compact liquid chiller for medical equipment, lasers, electronics, laboratory instruments or battery-powered devices?

Explore the standard 12V, 24V and 48V Mini Water Chiller models, download technical specifications or contact RIGID for a customized liquid cooling solution.

• Online ordering: https://www.rigidhvac.com/online-order
• OEM inquiries and technical support: quinn@rigidhvac.com

Share your heat load, target coolant temperature, maximum ambient temperature, flow rate and available DC voltage to get started.

Thermoelectric cooling and compressor-based refrigeration can both be used in compact equipment, but they serve different thermal requirements.

Engineering Factor Mini Water Chiller Thermoelectric Cooler

• Cooling Principle Vapor compression Peltier effect
• Refrigerant Compressor Yes No
• Active Below-Ambient Cooling Yes Yes, subject to operating conditions
• Hundreds-of-Watts Applications Often worth evaluating Requires careful efficiency and heat-rejection assessment
• Mechanical Complexity Refrigeration circuit and moving components Solid-state module, heat sinks and often fans/pumps
• Selection Basis Heat load, coolant temperature, ambient, COP Heat load, temperature difference, ambient, COP

A miniature compressor-based chiller is particularly worth evaluating when an application requires continuous active liquid cooling at substantial heat loads or when energy consumption is important.

The correct comparison must use complete-system cooling capacity and electrical input under the same conditions.

RIGID supplies standard mini water chiller modules and supports OEM/ODM customization for applications requiring different thermal, electrical or mechanical configurations.

Customization can include:

• Cooling capacity
• 12V, 24V or 48V power
• Compressor selection
• Refrigerant and approved system configuration
• Liquid evaporator
• Coolant fittings
• Condenser dimensions
• Fan configuration
• Temperature sensors
• Controller interface
• Mechanical mounting
• System dimensions
• Coolant-loop integration

Typical development sequence:

Application Requirements → Thermal Evaluation → System Selection → Prototype → Performance Validation → Production

For OEM integration, RIGID can evaluate whether a standard DV19-series chiller is sufficient or whether a different liquid-chiller platform is needed.

Portable Scalp Cooling for Chemotherapy Support.

RIGID has supported a portable liquid-cooling application developed with Cooler Heads for scalp cooling during chemotherapy.

The project demonstrates how miniature vapor-compression refrigeration can be integrated into a portable cooling product rather than a conventional industrial chiller.

• Application: Portable scalp cooling
• Cooling method: Circulating-liquid refrigeration
• Referenced product: DV1910E-P-S
• Engineering relevance: Compact DC cooling, portable integration and liquid-temperature management.

The application should be presented as an engineering case study. Any medical effectiveness or patient-outcome claims should be supported by the appropriate clinical evidence and product regulatory documentation.

Provide These Parameters for Engineering Evaluation.

Thermal requirements

• Required cooling capacity in watts
• Coolant inlet temperature
• Required coolant outlet temperature
• Maximum ambient temperature
• Continuous or intermittent operation

Coolant requirements

• Water, glycol or another fluid
• Coolant flow rate
• Coolant concentration
• Pressure and material compatibility

Electrical requirements

• 12V, 24V or 48V DC
• Available current
• Battery operation and required runtime

Mechanical requirements

• Maximum length × width × height
• Weight limit
• Mounting orientation
• Coolant connection requirements

The five essential starting parameters are:

Cooling Load + Coolant Temperature + Ambient Temperature + Flow Rate + DC Voltage

RIGID can use these parameters to evaluate the appropriate chiller configuration and provide an engineering recommendation.