Recirculating Chiller QD25H110

Small Recirculating Liquid Chiller for Laboratory, Medical & OEM Equipment.

RIGID QD25H110 is a compact, air-cooled recirculating liquid chiller module designed for small heat loads in laboratory instruments, medical devices, laser equipment, electronics and OEM machinery.

The refrigeration module combines an AC compressor, condenser, capillary expansion device and plate-type liquid evaporator into a compact assembly.

With 155W published cooling capacity, 120W rated power input and a 230 × 230 × 180 mm footprint, the QD25H110 provides a compact refrigeration platform for equipment requiring active liquid cooling.

The standard documented configuration operates from 110V AC, 60Hz and uses R134a refrigerant.

The evaporator has liquid inlet and outlet connections for integration into an external coolant circuit.

Key specifications

• Model: QD25H110
• Cooling capacity: 155W at the manufacturer's specified rating point
• Electrical input: 120W
• Power supply: 110V AC / 60Hz
• Refrigerant: R134a
• Evaporator: Plate-type liquid heat exchanger
• Coolant: Water or compatible water/glycol mixture
• Liquid connection: Ø12 mm
• Dimensions: 230 × 230 × 180 mm
• Net weight: 7 kg
• Published evaporating-temperature range: −5°C to 0°C
• Rated noise level: Below 48 dB(A), subject to test conditions

Engineering note: The QD25H110 is supplied as a compact refrigeration module. Confirm whether the coolant pump, reservoir, temperature controller and external circulation components are included in the quoted configuration.

Compact AC Refrigeration for Small Liquid-Cooling Loads.

Conventional laboratory water chillers may include a large reservoir, circulation pump, control panel and refrigeration system in one enclosure.

For OEM equipment that already contains a coolant circuit, a compact refrigeration module may offer a more flexible integration approach.

1. Compact Refrigeration Package

The 230 × 230 × 180 mm enclosure allows the refrigeration module to fit into equipment with limited installation space.

2. AC-Powered Operation

The standard 110V AC / 60Hz configuration is suited to equipment designed around this electrical supply. Other supply configurations should be confirmed with RIGID rather than assumed from the standard model.

3. Plate-Type Liquid Evaporator

The refrigerant-to-liquid evaporator removes heat from circulating coolant. This makes the module suitable for applications using an external pump, coolant reservoir or existing liquid loop.

4. 155W-Class Cooling

The published 155W rating makes QD25H110 a candidate for relatively small, continuous liquid-cooling loads. Actual available cooling capacity depends on coolant temperature, ambient temperature, flow rate and refrigeration operating conditions.

5. OEM Integration Flexibility

The module provides the core refrigeration components while allowing the customer to design the external coolant loop, fittings, controls and equipment enclosure.

Parameter Specification

• Product: Compact Recirculating Liquid Chiller Module
• Model: QD25H110
• Cooling type: Air-Cooled Vapor-Compression Refrigeration
• Rated Supply: 110V AC / 60Hz
• Cooling Capacity 155W
• Rated Power Input: 120W
• Working Current: 2.0A
• Refrigerant: R134a
• Evaporator: Plate-Type Liquid Heat Exchanger
• Liquid Connections: Ø12 mm
• Compatible Coolant: Water / suitable glycol mixture
• Application Volume: 1–10 L
• Evaporating Temperature: −5°C to 0°C
• Dimensions: (L × W × H)230 × 230 × 180 mm
• Net Weight: 7.0 kg
• Noise: Below 48 dB(A)
• Warranty: 12-month limited warranty

Important performance notes

1. The 155W cooling rating should be accompanied by its evaporating temperature, condensing temperature, coolant temperature, ambient temperature and flow rate once verified.
2. The 1–10 L figure describes the published application liquid-volume range, not the heat-removal capacity of the chiller.
3. The −5°C to 0°C specification is an evaporating-temperature range, not a guaranteed coolant outlet-temperature range.

Air-Cooled Refrigeration with a Liquid Evaporator.

The QD25H110 uses a vapor-compression refrigeration cycle to transfer heat from a circulating liquid into the surrounding air.

The refrigeration circuit consists of:

Compressor → Air-Cooled Condenser → Capillary Expansion Device → Liquid Evaporator → Compressor

Step 1: Compressor

The AC compressor circulates refrigerant and raises its pressure and temperature.

Step 2: Condenser

The condenser rejects heat from the refrigerant into the surrounding air.

Step 3: Capillary Expansion Device

The capillary reduces refrigerant pressure before the evaporator.

Step 4: Plate-Type Liquid Evaporator

The evaporator absorbs heat from the circulating liquid. The cooled liquid then returns to the external equipment.

External Coolant Loop

A typical OEM coolant circuit may include:

Chiller Evaporator → Circulation Pump → Equipment Cold Plate → Chiller Evaporator

Depending on the customer's design, a reservoir, temperature sensor, controller and safety devices may also be required.

The QD25H110 should not be described as a complete pump-and-reservoir recirculating chiller unless those components are included in the actual supplied configuration.

Match Cooling Capacity to the Actual Heat Load

The QD25H110 has a published nominal cooling capacity of 155W. However, this does not mean the module will continuously remove 155W under every operating condition.

Cooling performance depends on:

• Coolant inlet temperature
• Required coolant outlet temperature
• Ambient air temperature
• Condensing temperature
• Evaporating temperature
• Coolant flow rate
• Heat-exchanger performance
• Refrigeration operating conditions

Example: 100W Electronics Cooling

If an electronic instrument continuously generates 100W of heat, the chiller must remove at least 100W at the required coolant temperature and maximum ambient temperature.

The 155W published rating alone is insufficient to guarantee that performance. RIGID should confirm the available cooling capacity at the actual operating point before model approval.

Cooling Capacity vs. Coolant Volume

A 10-liter coolant reservoir does not necessarily require a larger chiller than a 1-liter reservoir. Reservoir volume mainly affects thermal mass and the time required to change coolant temperature. The continuous heat load determines the steady-state cooling requirement.

Laboratory Instruments

Compact liquid refrigeration for laboratory analyzers, scientific instruments, test equipment and research devices.

Key selection factors: Coolant temperature, heat load, fluid compatibility, available installation space and operating environment.

Medical Equipment

Liquid cooling for medical instruments and equipment with an external coolant loop.

Key selection factors: Thermal load, required temperature, coolant materials, electrical safety and equipment-specific regulatory requirements.

CO₂ Laser Cooling

A compact chiller can remove heat from a liquid-cooled laser tube or laser assembly.

Key selection factors: Laser manufacturer's required coolant temperature, continuous heat load, flow rate and maximum ambient temperature.

Electronics & X-Ray Equipment

Active liquid cooling for compact electronics, imaging assemblies and other heat-producing components.

Key selection factors: Component heat generation, coolant temperature, cold-plate performance and condensation prevention.

Beverage & Specialty OEM Equipment

Small refrigeration modules can support liquid-cooling applications in beverage equipment and other commercial products.

Key selection factors: Cooling load, liquid compatibility, operating duty cycle and required temperature.

For food or beverage-contact applications, the complete wetted fluid path must be evaluated for applicable material and hygiene requirements.

AC Refrigeration Module or DC Miniature Chiller?

RIGID offers multiple compact liquid-cooling platforms. The correct selection depends on electrical supply, cooling load, operating temperature and mechanical requirements.

Selection Factor QD25H110 Recirculating Chiller RIGID Mini Water Chiller Series

1. Power Supply: 110V AC / 60Hz standard 12V / 24V / 48V DC
2. Cooling Technology: AC compressor refrigeration BLDC miniature compressor refrigeration
3. Cooling Rating: 155W Model and rating-condition dependent
4. Refrigerant: R134a Model-specific
5. Main Use: Compact AC-powered liquid refrigeration Battery-powered and embedded DC liquid cooling
6. OEM Integration: Yes Yes

Choose QD25H110 when:

• The equipment uses a compatible AC supply
• The required heat load falls within the validated performance envelope
• A compact refrigeration module is preferred
• An external liquid loop can be integrated

Choose a DC Mini Water Chiller when:

• The equipment operates from a 12V, 24V or 48V DC bus
• Battery operation is important
• Variable-speed BLDC compressor integration is required
• The application's performance and mechanical requirements favor a DC platform

The QD25H110 uses an air-cooled condenser and requires sufficient ventilation.

The published maintenance documentation recommends maintaining at least 150 mm clearance around the unit for airflow.

Avoid installation close to excessive heat sources or in environments with corrosive gases.

Inspect the Cooling System Periodically

• Condenser cleanliness
• Fan operation
• Compressor noise and vibration
• Refrigerant piping condition
• Electrical connections
• Coolant leakage
• Refrigeration performance

The manufacturer documentation recommends inspection within approximately three months and maintenance within approximately six months, adjusted for the actual operating environment and duty cycle.

Refrigerant-circuit service must be performed by appropriately qualified personnel using suitable refrigerant-handling procedures.

RIGID supports application-specific refrigeration development when the standard QD25H110 does not meet the required thermal, electrical or mechanical conditions.

Potential customization includes:

• Cooling capacity
• Electrical supply
• Compressor selection
• Condenser configuration
• Liquid evaporator
• Refrigerant
• Coolant connections
• Mechanical dimensions
• Fan arrangement
• Temperature sensing
• Control integration
• Installation layout

Custom configurations require engineering evaluation and performance validation.

Development Process

Thermal Requirements → Refrigeration Selection → Mechanical Integration → Prototype → Performance Testing → Production

Provide These Parameters for Engineering Evaluation.

Thermal requirements

• Continuous heat load in watts
• Target coolant temperature
• Coolant inlet temperature
• Maximum ambient temperature
• Required pull-down time

Hydraulic requirements

• Coolant type
• Flow rate
• System liquid volume
• Pressure drop
• Hose and fitting dimensions

Electrical requirements

• AC supply voltage
• Frequency
• Available electrical power

Mechanical requirements

• Maximum dimensions
• Weight limit
• Condenser ventilation
• Mounting orientation

System integration

• Existing coolant pump?
• Existing reservoir?
• Temperature controller required?
• Continuous or intermittent operation?

The Most Important Selection Parameters

Heat Load + Coolant Temperature + Ambient Temperature + Flow Rate + AC Power Supply

RIGID can use these parameters to determine whether QD25H110 is appropriate or whether a customized compact liquid chiller is required.

Need a compact recirculating liquid chiller for laboratory, medical, laser, electronics or OEM equipment?

Contact RIGID for the QD25H110 specification, performance evaluation and application-specific cooling options. Email to, quinn@rigidhvac.com

Send your required heat load, coolant temperature, ambient temperature, flow rate and available electrical supply.

RIGID can recommend a standard cooling module or evaluate a customized refrigeration solution.

The published specification identifies the compressor, condenser, expansion capillary and evaporator, but does not establish that a coolant pump or reservoir is included. Customers should confirm the supplied configuration and provide external circulation components where required.

The published rating is 155W. Actual capacity depends on evaporating temperature, condensing temperature, coolant temperature, ambient temperature and flow rate. RIGID should confirm performance at the application's operating point.

The product specification lists applications with approximately 1–10 liters of liquid. However, coolant volume alone does not determine chiller suitability. The required cooling time, continuous heat load, target temperature and ambient conditions must also be evaluated.

Yes, vapor-compression refrigeration can provide below-ambient liquid cooling. However, the published −5°C to 0°C figure refers to evaporating temperature, not guaranteed coolant outlet temperature. Condensation and freeze protection must also be considered.

The downloadable specification confirms 110V AC / 60Hz. Other voltage and frequency configurations should be confirmed with RIGID before ordering. The standard model should not be connected directly to an incompatible supply.

QD25H110 uses an AC-powered compressor and is intended for compatible mains-powered equipment. A 24V Mini Water Chiller uses a low-voltage DC BLDC compressor architecture, making it more suitable for equipment with a 24V DC bus or battery supply.

It may be suitable for a small liquid-cooled CO₂ laser application if the validated cooling capacity meets the laser's heat load at the required coolant temperature and maximum ambient temperature. Flow rate and laser-manufacturer requirements must also be checked.

Routine checks include condenser cleanliness, fan operation, abnormal compressor noise, coolant leaks, electrical connections and refrigeration performance. The QD25H110 documentation recommends periodic inspection and maintenance based on operating conditions.

Provide the required heat removal in watts, coolant type, target temperature, maximum ambient temperature, coolant flow rate, electrical supply, available dimensions and whether the equipment already includes a pump and reservoir. These parameters allow RIGID to evaluate QD25H110 or recommend a customized solution.