CN101776375B - Defrosting device of vacuum freeze drier and method thereof - Google Patents
Defrosting device of vacuum freeze drier and method thereof Download PDFInfo
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- CN101776375B CN101776375B CN 201010104960 CN201010104960A CN101776375B CN 101776375 B CN101776375 B CN 101776375B CN 201010104960 CN201010104960 CN 201010104960 CN 201010104960 A CN201010104960 A CN 201010104960A CN 101776375 B CN101776375 B CN 101776375B
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- trap
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- steam valve
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- 238000010257 thawing Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 16
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 13
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009777 vacuum freeze-drying Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
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Abstract
The invention discloses a defrosting device of a vacuum freeze drier and a method thereof. The device comprises a cold trap, a vacuum pump, a small butterfly valve and a mushroom valve. The cold trap is respectively provided with a pressure transmitter, a cold trap coiler temperature probe and a water discharge temperature probe, and a water ring type vacuum pump vacuumizes the cold trap. The method comprises the steps of: vacuumizing the inner cold trap, so that steam enters to defrost when the inner cold trap is under the status of negative pressure; vacuumizing again; recycling until the cold trap has a certain temperature; vacuumizing the cold trap; and leading fresh air to be flowed into cold trap to complete the whole defrosting process. The invention has the advantage that the defrosting is complete to avoid ice barrier and guarantee the rapidity and the high efficiency of the defrosting of the cold trap coiler.
Description
Technical field
The present invention relates to a kind of defrosting device and method thereof of vacuum freeze drier.
Background technology
Vacuum freeze drying is exactly but that the hydrous matter of freeze-drying or solution are freezed in advance at low temperatures, makes the material dehydration obtain dry article then under vacuum environment.Common vacuum freeze drying has preceding case and condenser (being called cold-trap again), the effect of cold-trap is exactly that the water of preceding case material is trapped its inside, after the production of this batch is finished, eliminate the ice in the cold-trap with steam, to carry out the production of next batch product.
The defrosting system that is used for freeze dryer at present comprises cold-trap, vavuum pump group, small butterfly valve, every valve (being called Mushroom valve again), pressure transmitter, advance steam valve and pipeline, row's steam valve and pipeline.The problem that said apparatus exists is substantially all to be to carry out the steam defrost under positive pressure, after the ice on the cold-trap inner coil pipe is heated, all can fall down, thereby can often get lodged in the cold-trap discharge outlet.
Summary of the invention
The purpose of this invention is to provide a kind of defrosting device and method that is not prone to the stifled phenomenon of ice.
In order to achieve the above object, technical scheme of the present invention has provided a kind of defrosting device of vacuum freeze drier, comprise cold-trap, cold-trap is isolated from the outside by Mushroom valve and small butterfly valve, on cold-trap, be provided with cold-trap coil temperature probe, it is characterized in that, be provided with pressure transmitter and cold-trap water inlet steam valve at the top of cold-trap, cold-trap water inlet steam valve connects water inlet vapour main valve, device has the primary importance feedback signal device on water inlet vapour main valve, be provided with the draining steam valve in the bottom of cold-trap, the draining steam valve links to each other with total draining steam valve and water ring pump isolating valve, total draining steam valve and water ring pump isolating valve connect water-ring vacuum pump simultaneously, are provided with draining stripping temperature probe in the outlet of draining steam valve, are respectively equipped with second place feedback signal device and the 3rd position feed back signal device on Mushroom valve and small butterfly valve; Pressure transmitter, primary importance feedback signal device, second place feedback signal device, water-ring vacuum pump and the 3rd position feed back signal device link to each other with PLC.
Another technical scheme of the present invention has provided a kind of defrosting method, it is characterized in that, step is:
Step 1, judge according to second place feedback signal device and the 3rd position feed back signal device whether Mushroom valve and small butterfly valve close and put in place, then enter next step if close to put in place;
The present invention is provided with pressure transmitter, cold-trap coil temperature probe and temperature at discharging condensate probe respectively on cold-trap, can carry out the temperature checking, guarantees that defrost is complete; Vavuum pump can vacuumize cold-trap, and therefore all defrosts under negative pressure on this water can not occur, and defrost water all can be discharged by vavuum pump with the form of water vapour, and it is stifled ice can not occur; When small butterfly valve and Mushroom valve guaranteed the defrost of cold-trap vacuum and steam, cold-trap was isolated from the outside; The position feed back signal device that is provided with on small butterfly valve and Mushroom valve, the pressure transmitter of cold-trap top arrangement and water-ring vacuum pump can carry out programmed logic control with PLC, reach the purpose of automatic defrosting, have guaranteed the rapidity of cold-trap coil pipe defrost, high efficiency.
Advantage of the present invention is: guarantee that defrost is complete, the rapidity of blocking up and having guaranteed the defrost of cold-trap coil pipe, high efficiency can not occur icing.
Description of drawings
Fig. 1 is the defrosting device of vacuum freeze drier provided by the invention.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
As shown in Figure 1, defrosting device for a kind of vacuum freeze drier provided by the invention, comprise cold-trap 1, cold-trap 1 is isolated from the outside by Mushroom valve 10 and small butterfly valve 7, on cold-trap 1, be provided with cold-trap coil temperature probe 2, it is characterized in that, be provided with pressure transmitter 4 and cold-trap water inlet steam valve 3 at the top of cold-trap 1, cold-trap water inlet steam valve 3 connects water inlet vapour main valve 6, device has primary importance feedback signal device 5 on water inlet vapour main valve 6, be provided with draining steam valve 9 in the bottom of cold-trap 1, draining steam valve 9 links to each other with total draining steam valve 11 and water ring pump isolating valve 13, total draining steam valve 11 and water ring pump isolating valve 13 connect water-ring vacuum pump 14 simultaneously, are provided with draining stripping temperature probe 8 in the outlet of draining steam valve 9, are respectively equipped with second place feedback signal device 12 and the 3rd position feed back signal device 15 on Mushroom valve 10 and small butterfly valve 7;
The present invention also provides a kind of defrosting method that utilizes device, the steps include:
Step 1, judge according to second place feedback signal device 12 and the 3rd position feed back signal device 15 whether Mushroom valve 10 and small butterfly valve 7 close and put in place, then enter next step if close to put in place;
Because defrost is automated procedure, used valve mostly is an operated pneumatic valve, thus in order to guarantee that can valve switch, need to judge the atmospheric pressure signal, and water-ring vacuum pump needs water to cool off and seals, so before defrost, also need to judge the water pressure signal.
Claims (2)
1. the defrosting device of a vacuum freeze drier, comprise cold-trap (1), cold-trap (1) is isolated from the outside by Mushroom valve (10) and small butterfly valve (7), on cold-trap (1), be provided with cold-trap coil temperature probe (2), it is characterized in that, be provided with pressure transmitter (4) and cold-trap water inlet steam valve (3) at the top of cold-trap (1), cold-trap water inlet steam valve (3) connects water inlet vapour main valve (6), go up device at water inlet vapour main valve (6) primary importance feedback signal device (5) is arranged, be provided with draining steam valve (9) in the bottom of cold-trap (1), draining steam valve (9) links to each other with total draining steam valve (11) and water ring pump isolating valve (13), total draining steam valve (11) and water ring pump isolating valve (13) connect water-ring vacuum pump (14) simultaneously, outlet at draining steam valve (9) is provided with draining stripping temperature probe (8), is respectively equipped with second place feedback signal device (12) and the 3rd position feed back signal device (15) on Mushroom valve (10) and small butterfly valve (7);
Pressure transmitter (4), primary importance feedback signal device (5), second place feedback signal device (12), water-ring vacuum pump (14) and the 3rd position feed back signal device (15) link to each other with PLC.
2. a defrosting method that utilizes the defrosting device of the described vacuum freeze drier of claim 1 is characterized in that, step is:
Step 1, judge according to second place feedback signal device (12) and the 3rd position feed back signal device (15) whether Mushroom valve (10) and small butterfly valve (7) close and put in place, then enter next step if close to put in place;
Step 2, unlatching water-ring vacuum pump (14), opening water ring pump isolating valve (13) and draining steam valve (9) opens, begin cold-trap (1) is vacuumized, judge by pressure transmitter (4) whether cold-trap (1) internal pressure arrives-0.05MPa, if then, open water inlet vapour main valve (6) and cold-trap water inlet steam valve (3), cold-trap begins into steam in (1), when the pressure in the cold-trap (1) reach+during 0.01MPa, close into water vapour main valve (6);
Step 3, judge by cold-trap coil temperature probe (2) and draining stripping temperature probe (8) whether temperature reaches 50 ℃,, then enter next step if not if then jump to step 5;
Step 4, the pressure interior as if cold-trap this moment (1) continue to rise, then close water ring pump isolating valve (13), open total draining steam valve (11), when the pressure in the cold-trap (1) is reduced to 0.01MPa, close total draining steam valve (11), jump to step 2, if the pressure in the cold-trap (1) then directly jumps to step 2 not toward rising;
Step 5, unlatching water-ring vacuum pump (14), opening water ring pump isolating valve (13) and draining steam valve (9) opens, after vacuumizing more than 10 minutes to cold-trap (1), close water ring pump isolating valve (13) and draining steam valve (9), close water-ring vacuum pump (14) again, pure air enters in the cold-trap (1), and cold-trap returns to atmospheric pressure in (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010104960 CN101776375B (en) | 2010-02-03 | 2010-02-03 | Defrosting device of vacuum freeze drier and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010104960 CN101776375B (en) | 2010-02-03 | 2010-02-03 | Defrosting device of vacuum freeze drier and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101776375A CN101776375A (en) | 2010-07-14 |
| CN101776375B true CN101776375B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010104960 Active CN101776375B (en) | 2010-02-03 | 2010-02-03 | Defrosting device of vacuum freeze drier and method thereof |
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| Country | Link |
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| CN (1) | CN101776375B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341247A (en) * | 2018-10-19 | 2019-02-15 | 浙江冠峰食品机械有限公司 | A kind of vacuum freeze drier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3382586A (en) * | 1965-03-18 | 1968-05-14 | Atlas As | Apparatus for freeze-drying |
| CN2283983Y (en) * | 1996-02-08 | 1998-06-17 | 蔡枫 | Reclaiming device for biological pure water in prodn. of frozen foodstuff |
| CN2399690Y (en) * | 2000-01-05 | 2000-10-04 | 沈阳新阳速冻设备制造公司 | Vacuum freezing and drying appts for foodstuff |
| CN2903856Y (en) * | 2006-04-21 | 2007-05-23 | 北美冻干技术股份公司 | Water trap system for freeze dryer |
| CN101614469A (en) * | 2009-07-30 | 2009-12-30 | 上海东富龙科技股份有限公司 | A kind of full-automatic intelligent vacuum freeze dryer |
-
2010
- 2010-02-03 CN CN 201010104960 patent/CN101776375B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3382586A (en) * | 1965-03-18 | 1968-05-14 | Atlas As | Apparatus for freeze-drying |
| CN2283983Y (en) * | 1996-02-08 | 1998-06-17 | 蔡枫 | Reclaiming device for biological pure water in prodn. of frozen foodstuff |
| CN2399690Y (en) * | 2000-01-05 | 2000-10-04 | 沈阳新阳速冻设备制造公司 | Vacuum freezing and drying appts for foodstuff |
| CN2903856Y (en) * | 2006-04-21 | 2007-05-23 | 北美冻干技术股份公司 | Water trap system for freeze dryer |
| CN101614469A (en) * | 2009-07-30 | 2009-12-30 | 上海东富龙科技股份有限公司 | A kind of full-automatic intelligent vacuum freeze dryer |
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| Publication number | Publication date |
|---|---|
| CN101776375A (en) | 2010-07-14 |
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Address after: 201109 Shanghai city Minhang District Fanghe Road No. 2199 Patentee after: Dongfulong Technology Group Co.,Ltd. Address before: 201109 Shanghai city Minhang District Fanghe Road No. 2199 Patentee before: SHANGHAI TOFFLON SCIENCE AND TECHNOLOGY Co.,Ltd. |
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