The electric control system consists of hardware and so […]
The electric control system consists of hardware and software. The electric control system of the Lyophilization Equipment is composed of computer display recorder, console, control instrument, adjustment instrument and other automatic devices and circuits. Function of Lyophilization Equipment is to manually or automatically control the freeze dryer to control the normal operation of the equipment. The console is a centralized control group of temperature and vacuum inspection instrument and the switch of each unit. The instrument panel of the console is equipped with temperature, vacuum inspection instrument, vacuum meter for drying box and vacuum pump, and temperature indicator regulator. Liquid temperature control regulator, clock and so on. The button board is equipped with switches and the like of each unit. The lyophilizer is also provided with interlocking protection devices, such as ① the heating tube cannot work when the front box is cooled. ② The vacuum gauge cannot reach the set value, and the roots pump cannot be started. ③ If cooling water is not provided, the refrigeration unit will not start. ④Vacuum pump, solenoid valve with air release stop valve and vacuum pump power meter are connected together and work at the same time. ⑤ The shelf is heated at a constant temperature, which is controlled by the temperature indicating regulator.
Function and principle of Lyophilization Equipment (common definitions of terms)
1. What is lyophilization?
Freeze-drying is to freeze a substance containing a large amount of water into a solid in advance. Then, under the vacuum condition, the water vapor is directly sublimated from the solid, and the substance itself remains in the frozen ice shelf, so that the dried product does not lose the original solid skeleton structure, maintain the original shape of the material, and the product is restored Excellent water solubility.
2. Sublimation and Ninghua
The vaporization of certain solids without going into a liquid state is called sublimation.
When the steam meets an object with a lower freezing temperature than the steam, the steam will directly solidify into a solid and attach to the surface of the low-temperature object. This process is called condensation. The desublimation process is an exothermic process, which is the reverse process of sublimation.