LGJ-12S electric frost heating ordinary programming vacuum freeze dryer

LGJ-12S electric frost heating ordinary programming vacuum freeze dryerDetailed introduction:

The LGJ-12S (electric heating) ordinary vacuum freeze dryer comes with pre freezing function for samples, without the need for additional low-temperature refrigerators or liquid nitrogen pretreatment, simplifying the experimental process and reducing equipment investment costs. The opening size of the cold trap is large and made of corrosion-resistant 304 stainless steel material, which meets GLP requirements; It is a small vertical freeze-drying equipment with shelf heating and programmable functions, suitable for laboratory use or small-scale production, and can meet the requirements of most laboratory routine freeze-drying. The starting temperature of the vacuum pump can be preset. When it is lower than the set temperature, the vacuum pump can be started effectively to prevent a large amount of water vapor from entering the pump; Extend the service life of vacuum pumps. The intelligent data recording system automatically saves freeze-drying data, continuously records real-time data to generate tables, and can be viewed in the form of real-time curves and historical curves, making the entire freeze-drying process clear and concise. Using imported compressors, the refrigeration efficiency is high, quickly cooling the liquid moisture in the sample and ensuring that the cold trap has good water capture ability.

LGJ-12S electric frost heating ordinary programming vacuum freeze dryerTechnical parameter characteristics:

1. Integrated structural design, small size, no external flanges, easy to use, and no leakage.

2. All materials in contact with the product are made of inert materials that meet GLP requirements.

3. The cold trap and operating table are made of stainless steel material, which is corrosion-resistant and easy to clean.

4. The all stainless steel inflatable (drain) valve is safe, corrosion-resistant, and leak free.

5. The cold trap has a large opening, no inner coil, and comes with sample pre freezing function, without the need for a low-temperature refrigerator.

6. Using gas diversion technology, the cold trap captures ice evenly and has strong ice capturing ability.

7. Adopting imported brand compressors, with high refrigeration efficiency, long service life, and low noise.

8. Equipped with a vacuum pump as standard, it has a high pumping speed and can quickly achieve the maximum vacuum degree.

9. Vacuum pump protection function, which can set the starting cold trap temperature of the vacuum pump to protect its service life.

10.7-inch true color industrial embedded touch screen+SH-HPSC-II modular controller, high control accuracy, stable and reliable performance.

11. The FD-EMB control system, professionally designed, can store hundreds of process formulas, each containing 50 temperature control sections, improving process optimization efficiency.

12. Intelligent data recording system, real-time recording and display of cold trap temperature curve, sample temperature curve, vacuum degree curve, exporting data can be browsed, printed and operated through a computer.

13. Plate heating safety voltage (36V) temperature control system, which can control the heating rate.

14. Flexible manual and automatic control methods, manual exploration of processes, and automatic batch production.

15. Real time alarm display and historical alarm query function, convenient for fault diagnosis and equipment maintenance.

16. User level and password can be set, and operation management can be decentralized.

17. Equipped with sensor calibration function to ensure the accuracy of long-term measurement values.

18. The intelligent AI electric defrosting SH-10KCQ adopts safe voltage and multi-dimensional fuzzy control technology to improve defrosting efficiency.

Technical parameters of LGJ-12S (electric heating) ordinary vacuum freeze dryer:

Freeze dried area: 0.12 square meters

Plate mounted material: 1.2L (material thickness 10mm)

Partition temperature range: -40~+60 ℃

Material tray size: Φ 200mm

Number of material trays: 4

Material tray spacing: 70mm

Cold trap temperature: ≤ -60 ℃ (no load), optional ≤ -85 ℃ (no load), -110 ℃ (no load)

Cold trap depth: 240mm

Cold trap diameter: Ø 220mm

捕水能力： 4kg/24h

Extraction rate: 2L/S

Ultimate vacuum degree: ≤ 1Pa (no load)

Installed power: 1400W

Host weight: 62kg

Host dimensions: 580 × 500 × 720mm

-85 ℃ host external dimensions: 770 × 550 × 720mm

Drying room size: Φ 260 × 470mm

Cooling method: air cooling

Defrosting mode: Electric defrosting

The main applications of LGJ-12S (electric heating) ordinary vacuum freeze dryer are:

Suitable for freeze-drying of bulk (liquid, paste, solid) conventional substances. Effectively suppressed the biological, chemical, or physical changes of thermosensitive substances, and effectively preserved the active substances in the raw materials, as well as maintained the color of the raw materials.

Function and process introduction:

1. Pre freezing function: Quickly freeze the sample to form stable ice crystals

As the first step of freeze-drying, the pre freezing function requires rapid cooling of the sample below freezing point (usually 5-10 ℃ below the eutectic point of the material) to ensure that the moisture freezes into ice crystals. The equipment achieves rapid cooling through "compressor refrigeration" or "liquid nitrogen assisted refrigeration", with a cooling rate of up to 5-10 ℃/min, avoiding the formation of large ice crystals due to slow freezing (which can damage the cell structure or microstructure of the material), laying the foundation for subsequent sublimation drying.

2. Vacuum sublimation drying function: removes moisture from the sample

After pre freezing is completed, it enters the "vacuum sublimation stage": on the one hand, the vacuum system reduces the pressure inside the drying chamber to 1-10 Pa, allowing solid ice crystals to sublime directly at low temperatures (skipping the liquid stage); On the other hand, the heating system (mostly partition heating) provides energy for ice crystal sublimation through low-temperature heating (temperature lower than the eutectic point of the sample), avoiding sample melting. This process can remove 90% -95% of the moisture in the sample, reducing the final moisture content of the sample to 1% -5%.

3. Analysis of drying function: deep removal of bound water

After sublimation drying is completed, there is still a small amount of "bound water" (water tightly bound to the material molecules) remaining in the sample, which needs to be further removed through "analytical drying": the equipment increases the temperature of the partition (usually to 0-20 ℃) while maintaining a high vacuum degree to promote the detachment of bound water from the material surface and sublimation, ultimately reducing the moisture content of the sample to 0.5% -1%, ensuring that the sample is not easily hygroscopic or deteriorated during long-term storage.

4. Sample observation and data recording function: auxiliary experimental analysis

Equipped with a visual drying chamber, experimenters can observe in real time the morphological changes of the sample during the freeze-drying process (such as whether there is melting or bubbling); At the same time, the device supports recording "temperature time curve" and "vacuum degree time curve" through software, and can export data (such as Excel format) for easy organization of experimental data.