PID of refrigeration and heating cycle device (-60 ℃~200 ℃)

Refrigeration and Heating Cycle DeviceTypical Applications

Dynamic constant temperature control of high-pressure reactor cold and heat sources, double-layer glass reactor cold and heat sources, microchannel reactor cold and heat sources, small constant temperature control system, vapor saturation system temperature control, material low-temperature and high-temperature aging testing, combined chemical cold and heat source constant temperature control, semiconductor equipment cooling and heating, vacuum chamber cooling and heating constant temperature control.

Refrigeration and Heating Cycle DeviceAdvantages and functions

The temperature range is from -10 ℃ to 200 ℃, with good performance, high precision, and intelligent temperature control. The high cooling power ranges from 0.5 to 1200kW, and the production stability and repeatability results are good; Multi functional alarm system and safety function, using plate heat exchangers and pipeline heaters to improve heating and cooling rates; 7-inch and 10 inch color TFT touch screen graphic display, using magnetic drive pump, no shaft seal leakage problem; Fully enclosed system, extending the life of thermal conductive liquid, very wide temperature range, no need to replace liquid medium; High temperature cooling technology can directly cool down from a high temperature of 200 degrees Celsius.

This principle and function have many advantages for users: because only the thermal conductive medium inside the expansion chamber comes into contact with oxygen in the air (and the temperature of the expansion box is between room temperature and 60 degrees), it can reduce the risk of oxidation of the thermal conductive medium and absorption of moisture in the air.

At high temperatures, no thermal conductive medium evaporates, and continuous temperature control can be achieved at -20 to 300 degrees, -40 to 300 degrees, -60 to 300 degrees, and -80 to 300 degrees without the need for pressure.

Disadvantages of traditional slotted temperature control devices:

1. The oil tank has a large volume

The main functions of an oil bath are twofold:

A. Containing thermal conductive medium

B. Thermal conductive media have physical properties of thermal expansion and contraction, and the tank is equivalent to an expansion container.

The slotted system controls the external circulation, such as during jacket reactions. The larger the volume of the reaction kettle, the larger the volume of the jacket, and the more thermal conductive medium the entire system has. The concentration changes during heating and cooling processes are greater, and the volume requirements for oil and water baths are higher.

The heat load during the temperature change process of the entire system is the total amount of heat transfer oil in the system (mainly)+the reactants in the reaction kettle. The larger the volume of the water bath and oil bath, the lower the effective power used in the kettle, and the slower the response and rate of heating and cooling of the reactants in the kettle.

The temperature control of the reaction kettle relies on the temperature change of the heat transfer oil in the jacket of the reaction kettle to control the temperature inside the kettle. The more heat transfer medium in the system, the less effective power is used inside the kettle, and the slower the temperature rise and fall speed.

2. Absorption of water vapor

When the low-temperature reaction occurs, the surface temperature of the slotted oil bath is very low, which easily absorbs water vapor from the air and freezes on the surface of the coil evaporator. Ice is an insulator, and the frozen surface of the coil evaporator cannot conduct heat. Therefore, the compressor cannot cool the heat transfer medium and cannot reduce the temperature inside the kettle.

3. Oil mist

When subjected to high temperature reactions, heat transfer oil will evaporate into the laboratory air and condense on the surface of furniture, blocking the filters of fume hoods. Due to the different flash points of heat transfer oil, some can cause combustion and explosion. Heat transfer oil can only be used below 5 degrees below the flash point, so its temperature range is relatively limited. Therefore, at high temperatures, one medium is needed, and at low temperatures, another medium needs to be replaced. In addition, heat transfer oil is prone to browning and oxidation at high temperatures. So it is necessary to regularly replace the thermal oil, which has a relatively high cost of use.

4. Heating and cooling require manual switching, which can easily lead to misoperation and accidents.

The specialized closed heating, cooling, and temperature control system for the reaction kettle I produce overcomes all the shortcomings mentioned above.

Our company producesHeating and cooling circulation deviceThe characteristics are as follows:

1. Equipped with a heating and cooling integrated container, with a large heat exchange area and fast heating and cooling rates, the demand for heat transfer oil is also relatively small.

2. It can achieve continuous temperature rise and fall, using high temperature and high pressure operation compressor technology, and can directly start compressor cooling from 350 degrees, greatly providing cooling rate and saving testing time and energy.

3. The entire cycle is sealed, and there is no oil mist evaporation at high temperatures. The heat transfer oil is not easily oxidized or browned; Not easily absorbing water vapor from the air at low temperatures; Extended the service life of thermal oil.

4. This equipment has various safety protection functions such as self diagnosis, freezer overload protection, high-pressure switch, overload relay, thermal protection, high temperature heating cycle system high-pressure protection device, etc., fully ensuring safe use;

5. Temperature adaptive control

Adaptive control systems continuously adjust PID parameters to provide control temperature and response time for processes such as chemical reaction processes. This process is achieved through effective multidimensional measurement of temperature, temperature changes, and temperature change rates.

6. Equipped with PT100 temperature probe for correcting external and internal circulation.

7. Using R-404A refrigerant.

8. Control the speed of chemical reactions.

9. The cost of use is low.

10. The liquid circulation pipeline and heating tube are made of high-quality industrial grade seamless 304 stainless steel with a thickness of 3.0mm, and are not decorative pipes.

11. The refrigeration system adopts the American Gulen compressor, French Taikang, and high-temperature resistant circulation pump, with stable performance and reliable quality.

12. Wide working temperature range, with heating and cooling functions, temperature range: -80 to 350 degrees.

13. It can display both the set temperature value and the actual value, as well as the over temperature alarm value.

14. Efficient and fast liquid filling, simple liquid filling.

15. High head design, suitable for long-distance transportation of thermal conductive media.

16. The refrigeration system adopts the American Gulen compressor, French Taikang, and high-temperature resistant circulation pump, with stable performance and reliable quality.