Vacuum chillers, also known as vacuum coating chillers or vacuum freezers, use water as the refrigerant, and use a compressor to compress low-pressure vapor into high-temperature and high-pressure gas, and then spray it into a condenser to condense into a liquid. It is a machine that is cooled by the throttle valve and then turned into a low-temperature and low-pressure supercooled liquid.
The operation mode of vacuum chiller mainly includes the following steps:
After the pump is activated, the water is filtered through the filter and enters the water pipe at the bottom of the tank, where it flows along the pipe to the sprinkler head. Here, the water is atomized and cooled after coming into contact with the ejected high-pressure saturated vapor and absorbing heat.
The absorbed heat is transferred to the air through the heat exchanger for heat exchange.
After the air is discharged from the exhaust pipe, it exchanges heat with the outside atmosphere.
The heated air is then returned to the fan inlet and sucked indoors or outdoors to re-participate in the circulation.
In addition, in a vacuum, the objects inside the device generate heat, which is transferred to the vacuum environment by means of radiation, conduction, and convection. Thermal radiation is achieved by electromagnetic wave radiation of thermal energy, which transfers heat energy from a hot object to a low temperature object. Heat conduction is the contact between the object and the inner wall of the device, and the heat is transferred to the inner wall of the device by conduction. Heat convection is due to the influence of heat transfer, the gas inside the equipment will undergo convection, that is, the heat of the gas will rise and the cooler gas will sink, forming a cycle, this convection phenomenon can effectively bring the heat out.
In the design of a vacuum cooler, a condenser or cooling medium (such as liquid nitrogen) is usually set up to cool the air and objects inside the equipment. Through the action of the cooling medium, the heat inside can be pumped out, further reducing the temperature of the object.
Throughout the process, the refrigerant circulation system, the water circulation system and the appliance automation system work together. The refrigerant absorbs heat from the water in the evaporator and evaporates, then is sucked in by the compressor and compressed into a high-temperature and high-pressure gas, which is then dissipated through the condenser and condensed into a liquid. The water circulation system is responsible for transporting the cooling water to the equipment that needs to be cooled and returning the heat to the tank. The electrical automatic control system is responsible for controlling the operation of the entire unit, including the power supply of compressors, fans, pumps, etc., as well as the automatic control of temperature, pressure and other parameters.
The above information is for reference only, for more information, it is recommended to consult a professional.
