Circulating water cooler(also known as cooling water circulation machine, chiller, ice water machine) is a water circulation temperature control device with compressor refrigeration technology as its core, mainly used for constant temperature cooling of laboratory scientific research instruments and industrial equipment.
Circulating water coolerworking principle:
Heat absorption: The coolant (usually pure water or a mixture of water and ethylene glycol) flows through the water-cooled channels inside the equipment (such as X-ray tube sleeves, high-pressure generator heat dissipation plates, detector cooling plates, etc.) driven by a water pump, absorbing the heat generated by the equipment and raising its own temperature.
Heat transfer: The warm coolant that absorbs heat is pumped through pipelines to the evaporator/plate heat exchanger of the water cooler. In the evaporator, the heat of the warm coolant is transferred to the refrigerant of the refrigeration system, which absorbs the heat and evaporates (from liquid to gas).
Heat release: The gaseous refrigerant is sucked in and compressed by the compressor, becoming a high-temperature and high-pressure gas. In the condenser, the high-temperature and high-pressure refrigerant gas is cooled using ambient air (air-cooled) or external cooling water (water-cooled, less common) forcibly drawn in by a fan. The refrigerant releases heat to the ambient air/cooling water and condenses itself (from a gaseous state back to a liquid state).
Pressure regulation and recirculation: The liquid refrigerant flows through an expansion valve (or capillary tube), which is a throttling device that rapidly reduces the pressure and temperature of the liquid refrigerant, turning it into a low-temperature and low-pressure liquid (mixed with a small amount of gas). The low-temperature and low-pressure liquid refrigerant enters the evaporator/plate heat exchanger again, preparing to absorb the next round of heat from the coolant and complete the refrigeration cycle. After being cooled by the refrigerant in the evaporator (with a reduced temperature), the coolant is pumped back to the equipment to absorb heat, and this cycle repeats.
Structural composition:
Compressor: As a core component, it is responsible for compressing refrigerant gas, increasing its temperature and pressure.
Evaporator: It is a place where the refrigerant exchanges heat with the coolant, where the refrigerant absorbs the heat of the coolant and evaporates.
Condenser: Used to cool and condense high-temperature and high-pressure refrigerant gas, releasing heat into the environment.
Circulating pump: drives the coolant to circulate inside the equipment, ensuring continuous heat exchange.
Microcomputer controller: realizes precise temperature adjustment and control, usually with an accuracy of ± 0.1 ℃.
Safety protection system: including compressor overload protection, refrigerant shortage protection, high and low pressure protection, water flow switch/flow protection, etc., to ensure the safe operation of equipment.