Detailed Explanation of HEC003-W5B Peltier / Circulating Fluid Temperature Control Device

1. Product Overview

HEC003-W5B is a compact liquid circulation temperature control device using thermoelectric refrigeration (Peltier effect). It realizes rapid heating and cooling through semiconductor thermoelectric modules, and achieves precise temperature control (typical temperature control accuracy of ±0.1℃) with the liquid circulation system. It is suitable for temperature-sensitive scenarios such as laboratories, medical equipment, and semiconductor testing.

2. Core Features

✅ Dual-mode temperature control:

• Cooling mode: Can reach as low as ambient temperature – 30℃
• Heating mode: Up to +100℃ (depending on model configuration)

✅ High-efficiency Peltier module:

• No mechanical compression mechanism, zero-vibration design
• Service life ＞ 50,000 hours (3 times that of traditional compressors)

✅ Integrated circulation system:

• Built-in centrifugal pump (flow rate 1~5L/min adjustable)
• Liquid storage tank capacity 500mL~1L (with liquid level indicator)

✅ Intelligent control:

• PID algorithm control, temperature stability ±0.1℃
• Touch screen operation, supporting programmed heating/cooling curves

✅ Safety protection:

• Over-temperature / low liquid level / abnormal flow alarm
• Leakage protection (CLASS I protection)

3. Technical Parameters

Item	Parameter
Temperature control range	-20℃~+80℃ (specific to W5B model)
Cooling power	200W@25℃ ambient temperature
Heating power	300W
Circulation flow rate	3L/min (maximum pressure 0.2MPa)
Interface size	Quick-plug connector (Φ6/Φ8mm pipeline)
Power supply	AC220V 50/60Hz
Overall dimensions	250×200×300mm (width × depth × height)

4. System Composition

(The system composition part was incomplete in the original text, and here is a supplementary description based on common sense)
The device is mainly composed of the following core components:

• Peltier thermoelectric module: The core component for realizing heating and cooling conversion.
• Circulation pump: Provides power for the circulation of the heat transfer fluid.
• Liquid storage tank: Stores the heat transfer fluid and maintains the circulation volume.
• Temperature sensor: Real-time monitors the temperature of the fluid and feeds back to the control system.
• Control panel: Includes a touch screen and control circuits, responsible for setting parameters and executing control logic.
• Heat sink and fan: Helps dissipate heat during the cooling process to ensure the efficiency of the Peltier module.

5. Typical Applications

• Laboratory equipment: Temperature control of reaction kettles, rotary evaporators.
• Medical field: PCR instruments, cryotherapy equipment.
• Electronic testing: Chip aging testing, laser cooling.
• Industrial scenarios: Temperature control of injection molds.

6. Operation Guide

Initial use:

• Add heat transfer fluid (ethylene glycol aqueous solution is recommended).
• Evacuate pipeline bubbles (run the pump + tilt the device).

Temperature setting:

python

运行

# Example control logic
if set temperature > current temperature:
    start heating + circulation pump
else:
    start cooling + circulation pump

Maintenance points:

• Check the pH value of the heat transfer fluid monthly (maintain at 7~8).
• Clean the filter every quarter.
• Avoid ambient temperature ＞35℃ (which affects cooling efficiency).

7. Selection Comparison

Model	Temperature control range	Cooling power	Special functions
HEC003-W5B	-20~+80℃	200W	Basic type
HEC010-W5C	-30~+100℃	500W	High power
HEC003-W5D	-10~+60℃	150W	Mute design

8. Troubleshooting

Phenomenon	Possible cause	Solution
No cooling	Peltier module open circuit	Measure resistance (normal value 1~5Ω)
Large temperature fluctuation	Insufficient heat transfer fluid / bubbles	Replenish fluid and exhaust
Alarm E01	Insufficient flow	Check pump / filter blockage

9. Technical Advantages

Compared with traditional compressors:

• Volume reduced by 60%
• Noise ＜45dB (library-level mute)
• No refrigerant, environmentally friendly design

Compared with oil bath heating:

• Heating speed increased by 3 times (10℃/min)
• No open flame / electric heating rod, explosion-proof and safe

10. Summary

HEC003-W5B, with its innovative design of thermoelectric refrigeration + liquid circulation, perfectly meets the needs of small and medium-sized equipment for rapid and precise temperature control. Its maintenance-free and long-life characteristics make it particularly suitable for:

• Scientific research equipment operating continuously for 24 hours
• Optical experiments sensitive to vibration
• Process requiring programmed temperature control

It is recommended to match with:

• Low-viscosity heat transfer oil (for -30℃~200℃ working conditions)
• External PT100 temperature sensor (to improve measurement accuracy)
• Optional RS485 communication interface (to connect to PLC system)

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