CN201314766Y - Refrigeration controller for freezedryer - Google Patents
Refrigeration controller for freezedryer Download PDFInfo
- Publication number
- CN201314766Y CN201314766Y CNU2008201569147U CN200820156914U CN201314766Y CN 201314766 Y CN201314766 Y CN 201314766Y CN U2008201569147 U CNU2008201569147 U CN U2008201569147U CN 200820156914 U CN200820156914 U CN 200820156914U CN 201314766 Y CN201314766 Y CN 201314766Y
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- expansion valve
- temperature
- plc
- transmitter
- suction side
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Abstract
The utility model relates to a refrigeration controller for a freezedryer. A temperature transmitter is arranged at the air suction side of a compressor of a refrigerator; the air suction side of the compressor of the refrigerator is provided with a pressure transmitter; the temperature transmitter and the pressure transmitter are respectively accessed to a PLC; the PLC is accessed to the control end of an electronic expansion valve in a feedback mode; the output end of the refrigerator is accessed to the electronic expansion valve; a technology of integrating the electronic flow rate control and the expansion valve is adopted, and the required flow rate is worked out to be output to the expansion valve by theoretical temperature and pressure through the temperature and pressure measurement at the air suction side, so the open degree of the valve is accurately controlled to reach the accurate control on the refrigeration rate. Thereby, the product quality is improved. After the freezedryer is sterilized in steam, the overheating shutdown or damage of the compressor during refrigerating veneer sheets can not be caused, and the work efficiency is improved.
Description
Technical field
The utility model freeze dryer cooling controller, what relate to is the freeze dryer technical field, is applied to freeze dryer.
Background technology
Vacuum freeze drier is commonly called as freeze dryer, be a kind of medicine that is widely used in, the drying equipment of food service industry, its purposes is to allow material freeze at low temperatures, moisture content is wherein distilled under vacuum state, and collect the moisture content of condensation to reach the purpose of material drying and dehydrating with the method for condensation.At present, along with China's medicine, food service industry are further adapted to international practices, freeze dryer is more and more higher in aspect instructions for uses such as vaccine, blood product, bio-pharmaceuticals, medicine, health products.
The cooling device of present freeze dryer adopts refrigerant condenser and mechanical swelling valve control mode, and the major function of mechanical swelling valve is the aperture of control valve, thus control injection of refrigerant flow.The adjustment of mechanical swelling valve opening is mainly adjusted by artificial, it by three part actings in conjunction in the adjustment of valve, the one, the whole turn set screw of personnel selection wage adjustment overcomes spring force and adjusts aperture; The 2nd, thus the temperature-sensitive bag is sensed the aperture that the height of suction temperature is adjusted valve, this effect can only be made small adjustment, carry out the aperture of increasing valve among a small circle when too high when sensing suction temperature, cross the aperture that reduces valve of carrying out when low among a small circle when sensing suction temperature; The 3rd, the adjustment that is used for carrying out valve of equilibrium pressure solenoid, this effect still can only be made small adjustment, sense pressure of inspiration(Pi) when expansion valve by the equilibrium pressure solenoid and cross when low, can carry out the aperture of increasing valve among a small circle, otherwise can carry out the aperture that reduces valve among a small circle.As the application on freeze dryer, usually require expansion valve can reach below-75 ℃, this just need manually adjust expansion valve, and artificial the adjustment is the thing of a more complicated, and be excessive if expansion valve opening is adjusted, can cause on the valve frosting serious, and cause " liquid is long-pending ", even damage compressor, too small if expansion valve is adjusted, can cause temperature not reach, can not satisfy production requirement.Simultaneously along with variation of ambient temperature and time all deviation can occur, therefore exchanging the person of giving sb. a hard time need possess more rich experience, and along with the variation of time, the working condition of expansion valve also can change, and is unfavorable for steady production.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned defective, and electric expansion valve is applied to freeze dryer, for the bio-pharmaceuticals industry, to the further freeze dryer cooling controller that improves of the assurance of product quality.Its technology is achieved in that the structure that comprises refrigerating plant, pressure transmitter, temperature transmitter, PLC, it is characterized in that: the suction side of refrigerating plant is equipped with temperature transmitter, the suction side of refrigerating plant is equipped with pressure transmitter, pressure transmitter and temperature transmitter insert PLC respectively, the PLC feedback inserts the electronic expansion valve controls end, the refrigerating plant output inserts electric expansion valve, and electric expansion valve (1) connects freeze dryer (6) by pipeline; Described PLC is made up of output module, input module and CPU, adopts Electronic Control flow and expansion valve to unite two into one and is combined into the structure of electric expansion valve.The positive effect of implementing after this technology is: the technology that adopts Electronic Control flow and expansion valve to unite two into one, by temperature and pressure measxurement to suction side, the theoretical temperatures pressure gauge is calculated the flow of needs output to expansion valve, thereby the aperture of accurate control valve reaches the accurate control to amount of cooling water; According to setting, all by sensor feedback signal and compare corrected Calculation by cover refrigerating theory formula and a real data and go out best output quantity and adjust automatically to expansion valve, can deviation not take place because of the variation of environment temperature and time; Stable temperature control, limit low temperature can reach lower, can not produce the temperature big ups and downs, thereby promote the quality of product; Can not cause " liquid long-pending " phenomenon, avoid damaging compressor thereby reach, when freeze dryer behind steam disinfection, can not cause overheat of compressor to shut down or damage when laminate is cooled off, improved compressor operating efficient
Description of drawings:
Fig. 1 is the utility model freeze dryer cooling controller structural representation;
Wherein, 1-electric expansion valve, 2-pressure transmitter, 3-temperature transmitter, 4-PLC.The 5-refrigerating plant, 6-freeze dryer, 7-temperature sensor.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
See accompanying drawing 1, the suction side of refrigerating plant (5) is equipped with temperature transmitter (3), suction side is equipped with pressure transmitter (2), pressure transmitter (2) inserts PLC (4) respectively with temperature transmitter (3), PLC (4) output inserts electric expansion valve (1) control end, and refrigerating plant (5) output inserts electric expansion valve (1); Electric expansion valve (1) connects freeze dryer (6) by pipeline, the temperature sensor (7) that is provided with in the freeze dryer (6) is connected with PLC (4), PLC (4) is made up of output module, input module and CPU, the structure that Electronic Control flow and expansion valve unite two into one and make up.
See accompanying drawing 1, during work, detect the actual temperature of freeze dryer (6) by temperature sensor device (7), and compare according to desired temperature and actual temperature, when the actual temperature of freeze dryer (6) is higher than desired temperature, refrigerating plant (5) is exported to electric expansion valve (1) with increasing, when actual temperature is lower than desired temperature, refrigerating plant (5) will reduce to export to electric expansion valve (1) until cutting out fully, and work is to the control of electric expansion valve (1), temperature transmitter (3) sends the temperature signal of refrigerating plant (5) suction side that collects to PLC (4), input to formula as temperature value, pressure transmitter (2) sends refrigerating plant (5) the suction side pressure signal that collects to PLC (4), input to the formula of setting as force value, simultaneously PLC (4) calculates theoretical temperatures under this pressure by lookup table mode, the degree of superheat that relatively calculates evaporimeter in actual temperature and theoretical temperatures, and on the basis of the inner pid control mode of PLC (4), carry out the output of full cut-off ring and control, according to setting, when the degree of superheat is big, PID calculates the output that strengthens electric expansion valve (1) automatically, when the degree of superheat is less, PID calculates the output that reduces electric expansion valve (1) automatically, thereby adjust the aperture of electric expansion valve (1) automatically according to the amount of cooling water of the object needs that are cooled, realize control automatically.
Claims (2)
1. freeze dryer cooling controller, the structure that comprises refrigerating plant (5), pressure transmitter (2), temperature transmitter (3), PLC (4), it is characterized in that: the suction side of refrigerating plant (5) is equipped with temperature transmitter (3), pressure transmitter (2), pressure transmitter (2) inserts PLC (4) respectively with temperature transmitter (3), PLC (4) output inserts electric expansion valve (1) control end, refrigerating plant (5) output inserts electric expansion valve (1), and electric expansion valve (1) connects freeze dryer (6) by pipeline.
2. freeze dryer cooling controller according to claim 1 is characterized in that: described PLC (4) is made up of output module, input module and CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201569147U CN201314766Y (en) | 2008-12-11 | 2008-12-11 | Refrigeration controller for freezedryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201569147U CN201314766Y (en) | 2008-12-11 | 2008-12-11 | Refrigeration controller for freezedryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201314766Y true CN201314766Y (en) | 2009-09-23 |
Family
ID=41126564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201569147U Expired - Fee Related CN201314766Y (en) | 2008-12-11 | 2008-12-11 | Refrigeration controller for freezedryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201314766Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022903A (en) * | 2010-12-01 | 2011-04-20 | 上海共和真空技术有限公司 | Energy-saving device for freeze dryer |
| CN103335507A (en) * | 2013-06-21 | 2013-10-02 | 上海东富龙制药设备制造有限公司 | Sterilization cooling device for vacuum freeze drier |
| CN103365318A (en) * | 2013-07-12 | 2013-10-23 | 楚天科技股份有限公司 | Freeze drying equipment ply temperature intelligent control method and freeze drying equipment ply temperature intelligent control system |
-
2008
- 2008-12-11 CN CNU2008201569147U patent/CN201314766Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022903A (en) * | 2010-12-01 | 2011-04-20 | 上海共和真空技术有限公司 | Energy-saving device for freeze dryer |
| CN102022903B (en) * | 2010-12-01 | 2012-10-10 | 上海共和真空技术有限公司 | Energy-saving device for freeze dryer |
| CN103335507A (en) * | 2013-06-21 | 2013-10-02 | 上海东富龙制药设备制造有限公司 | Sterilization cooling device for vacuum freeze drier |
| CN103365318A (en) * | 2013-07-12 | 2013-10-23 | 楚天科技股份有限公司 | Freeze drying equipment ply temperature intelligent control method and freeze drying equipment ply temperature intelligent control system |
| CN103365318B (en) * | 2013-07-12 | 2016-02-24 | 楚天科技股份有限公司 | A kind of freeze dryer flaggy temperature intelligent control method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI SHUBO LANI ELECTRICAL TECHNOLOGY CO., LTD Free format text: FORMER NAME: SHANGHAI SUPARNIN PHARMACEUTICAL EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Nanhui District 201323 Shanghai Zhuqiao Airport Industrial Zone gold smell Road No. 30-1 Patentee after: SHANGHAI SUPARMIN ELECTROMECHANICAL SCIENCE & TECHNOLOGY CO., LTD. Address before: Nanhui District 201323 Shanghai Zhuqiao Airport Industrial Zone gold smell Road No. 30-1 Patentee before: Shanghai Suparnin Pharmaceutical Equipment Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090923 Termination date: 20161211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |