Weak current College】 【active cold storage in plasma preservation use】.

<br> Major hospitals in recent years, with extensive promotion of blood components, in red blood cell concentrate is applied separation process, will produce a lot of fresh frozen plasma (FFP), compared with the extension number before the blood components multiplied growth, .frozen after save as a tremendous challenge, now rely simply increase the number of the freezer is bound to bring space jam, spend more, inventory stock of difficulties and unsightly disadvantages, in response, we conduct extensive research, the activities of thought into the cold .plasma cryopreservation, active cold storage designed for imported units, efficient refrigerant, possible low temperature refrigeration limits, depending on the degree of automation is high, low maintenance, while according to the principles of the WHO and the Ministry of health with the relevant provisions of .plasma cryopreservation, design-40 ℃ is appropriate; therefore, the combination of Qingdao City existing housing conditions, qmp, local conditions, the final design an overall dimension: 4500mm × 3150mm × 2700mm, insulation thickness for the stainless steel activities freezer 150mm, after .several years running has proved that good effect, successfully resolved the huge plasma Cryopreservation of challenges, both saving money to buy a large number of freezer, expanded storage capacity, and in view of the complete set of effective maintenance, repair and maintenance <? xml .: namespace prefix = "o" ns = "urn: schemas-microsoft-com: office: office"?> experience: <o:p> </ o: p> 1 active cold storage <o:p> </ o: .p> design: (1) activities the cold storage design nominal library temperature-40 ℃ ~ -35 ℃. (2), -40 ¡ .æ, the nominal cooling capacity 3500W. (3) design stock temperature 25 ° c, a maximum purchase amount 100000ml, daily maximum purchase amount 200000ml. (4) the activities of the cold storage of imported air-cooled condensing refrigerant compressor unit, type .unit air cooled evaporator, solenoid valve, dry filter, pressure controller, the refrigerant in all imported products. (5) active cold storage library body double-sided stainless steel hard polyurethane insulation Library Board, insulation layer thick 150mm. (6) use automatic .microcomputer control of cold storage, and implements computer data collection, storage, printing, etc. Cold storage <o:p> </ o: p> 2 activities: <o:p> </ o: p> control part of the activities .of the cold control part adopts United States latest technology high anti-interference micro-computer and sensors with intelligent multifunctional software manufacturing, products with functional and easy to operate, reliable operation, energy savings, the high degree of automation is to improve cold storage reliability ., lower maintenance costs of the ideal matching products, the following are the main features and technical <o:p> </ o: p> parameter: 1. the activities of cold storage temperature range: -40 ° c ~ 50 ° c, .adjustable, display range: -45 ° c ~ 50 ° c, resolution 1.0 ℃. <o:p> </ o: p> 2. return temperature difference: active cold storage control temperature range 1 ℃ ~ 10 ° adjustable resolution 1.0 ℃ .. <o:p> </ o: p> 3. integrating cycle: activities of cream cold storage interval as working time of the compressor, the compressor is running time, control setting range 0.4 ~ 24h adjustable resolution 0.1h, moved to OFF .when no function of defrosting. <o:p> </ o: p> 4. activities of cold storage compressor protection: start time and the last down time interval £ ¾ 3min, suction pressure protection, overload protection, lack of protection. < .o: p> </ o: p> 5. activities in the refrigeration and freezer defrosting function: when the temperature is higher than the set value library plus return temperature difference, delay 3min open condenser, delay 20s open solenoid valve, compressor and air .cooler. When the library temperature equal to or lower than the set value, the solenoid valve closes after the delay 1min stop compressors, air cooler, then delay 20s, close the condenser. When the compressor working time equal to the set integrating cycle time and .temperature is lower than the set value library, evaporator with cream, you automatically enter cream; when cold evaporator temperature above 15 ° c or when defrosting time> 50min, exit defrosting, automatically enter refrigeration. <o:p> </ o: p .> 6. activities of cold storage control display: 3 super bright figures indicate that the monitor set operation display set value, the work displays the active temperature, cold storage by active discharging of cold storage tube evaporator temperature key to display the temperature, fault display .fault code, led displays the load status and set content, digital tube red dot in the top left side as the switch on the machine when the flashing time-delayed State. <o:p> </ o: p> <o: p .> </ o: p> 3 active cold storage library <o:p> </ o: p> body parts, taking into account the activities of the refrigerator compressor noise, active outdoor cold storage warehouse in the rain, anti-theft measures ., as well as for unit cooling. Compressor turbine unit Germany imports, three-phase AC power supply 380V. Library in a thickness of polyurethane foam technology be 150mm-sided stainless steel forming sheet metal Assembly, built-in moisture-proof, explosion- .proof lights, a gated switch control, to prevent the door perimeter dew, a heated soft silk, the actual use, the effect is better. In addition, activities in the surrounding of prefabricated cold storage library with high-quality, corrosion-resistant multi .-layer rack, stainless steel to increase the effective storage capacity, with food plastic turnover box for easy inventory stock, take convenient. <o:p> </ o: p> 4 Active refrigerated warehouse debugging <o:p> </ o .: p> trial operation: after installation, run the empty library, open 24h downtime, defrosting, protection, and other technical indicators, grab the original test data for final acceptance. <br> <br> Activities in the refrigeration system protection and alarm .test: (1) overload (PU): disconnect the chassis tlb 9 #, protection and alarm function. (2) phase (FU): any of the two-phase respectively disconnect AC power, protection and alarm function. (3) suction .and exhaust pressure (PE) human-caused two pressure anomalies, system alerts properly. (4) people to make the sensor open circuit, short circuit, protection and alarm function. <o:p> </ o: p> <o: .p> </ o: p> <o:p> </ o: p> 5 conclusions: from above, the empty library-on average 3 times per hour, down 3 times to run correctly, meet the design requirements. Then gradually .increase the inventory, the unit is operating normally; it has been running for more than 5 years, the practice shows that the traditional method of the transplantations to the plasma cryopreservation, with low cost, to save space, library, large capacity, weekday access ., easy extended inventory and various medical indicators in plasma, in full compliance with hygiene requirements..