CN101251309A - Refrigerating method of vacuum freezing dryer - Google Patents
Refrigerating method of vacuum freezing dryer Download PDFInfo
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- CN101251309A CN101251309A CNA200810035882XA CN200810035882A CN101251309A CN 101251309 A CN101251309 A CN 101251309A CN A200810035882X A CNA200810035882X A CN A200810035882XA CN 200810035882 A CN200810035882 A CN 200810035882A CN 101251309 A CN101251309 A CN 101251309A
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- silicone oil
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- refrigerating
- silicon oil
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Abstract
The invention relates to a refrigerating method for a vacuum freeze drier. The invention is characterized in that the method comprises the following steps that: silicon oil is directly injected into a pipe coil of a condenser of a freeze drier, the silicon oil flows into the inner part of a plate heat exchanger, a compressor is started to refrigerate the silicon oil inside the plate heat exchanger; the refrigerated silicon oil is sent to the condenser pipe coil inside the condenser by a recycle pump, the aim of refrigerating the condenser pipe coil by the circulation of the silicon oil is achieved. The refrigerating method for the vacuum freeze drier has the advantages of good refrigerating effect and more stable working condition of the compressor.
Description
Technical field
The present invention relates to a kind of refrigerating method of vacuum freeze drier, but exactly the hydrous matter of freeze-drying or solution are freezed in advance at low temperatures, under vacuum environment, make the material dehydration obtain dry article then, belong to the vacuum freeze drier technical field.
Background technology
Vacuum freeze drying (abbreviation freeze dryer) but be exactly that the hydrous matter of freeze-drying or solution are freezed in advance at low temperatures, under vacuum environment, make the material dehydration obtain dry article then.
This drying means with common dry, dry, boil dry, spray-drying is compared with vacuum drying that many outstanding advantages are arranged:
(1) do not make protein, microorganism and so on produce sex change or lose biologos;
(2) loss of the nutritional labeling of volatile ingredient in the material and heated denaturalization is little;
(3) effect of microbial growth and enzyme almost can't be carried out, and can keep the original proterties of material best;
(4) drying back form is constant substantially, is spongy open structure; Rehydration is easy, can promptly be reduced into original proterties;
(5) dry under vacuum, oxygen is few, makes the material of easy oxidation obtain protection;
(6) can remove in the material 95%～99% moisture, the goods long shelf-life;
So freeze dryer is widely used in: pharmaceuticals industry, biological products; Biological tissue, microbiology class: animals and plants; Food industry; Chemical industry; Health care products and Chinese herbal medicine etc.
The refrigeration modes of tradition freeze dryer condenser coil is that freon directly evaporates in condenser inside, thereby reaches the purpose of refrigeration, and its shortcoming is:
1) traditional direc expansion refrigeration, compressor freezes to flaggy earlier during pre-freeze, the predetermined back compressor that finishes freezes to condenser again, the cooling condition instability, secondary sublimation stage particularly, moisture in the goods is considerably less, and compressor is in overload operation for a long time, is unfavorable for the service life of compressor;
2) direc expansion refrigeration is not because the power failure compressor is worked, and condenser temperature gos up very fast, can influence quality of item;
3) often to design be one or more groups coil pipe of the corresponding condenser of a compressor in direct expansion, in case compressor breaks down or when stopping a compressor, the proportional decline of the whole frosting surface area of condenser has aggravated the load of condenser.
Summary of the invention
The purpose of this invention is to provide a kind of good refrigeration effect, the refrigerating method of the vacuum freeze drier that the operating mode of compressor is more stable.
For realizing above purpose, technical scheme of the present invention provides a kind of refrigerating method of vacuum freeze drier, it is characterized in that, this method is: directly annotate silicone oil in the coil pipe of the condenser of freeze dryer, silicone oil flows to plate type heat exchanger inside, and compressor start freezes to the silicone oil of plate type heat exchanger inside; Cooled silicone oil is got to by circulating pump in the condenser coil of condenser inside, by the circulation repeatedly of silicone oil, thereby reaches the purpose that condenser coil is freezed.
The present invention directly annotates silicone oil in the coil pipe of the condenser of freeze dryer, outer compressor of the refrigeration of silicone oil and plate type heat exchanger directly carry out heat exchange, replace the mode that direct system cryogen freezes in the original condenser coil, promptly replace original traditional direct refrigeration modes with present double heat exchange.
Advantage of the present invention is:
1. during pre-freeze, flaggy and coil pipe all have conduction oil to flow into, freeze simultaneously, the temperature of condenser is lower than the temperature of freeze dryer flaggy, after so goods pre-freeze is finished, the temperature of rear cabinet condenser is very low, can directly begin to vacuumize this moment to enter the lyophilization stage, has shortened whole lyophilization cycle;
2. condenser temperature can be controlled, because condenser coil inside is the silicone oil circulation, so the control of the temperature of condenser is very convenient, guarantees that like this repeatability of every batch of goods or repeatability are relatively good, because flaggy temperature, vacuum and condenser temperature can be controlled;
3. can realize very fast flaggy refrigerating speed, be specially adapted to require the goods of quick-freeze, when freeze drying box is carried out charging, opening compressor freezes to condenser, after the goods inlet finishes, can switch to the freeze drying box flaggy to the perishing silicone oil of condenser, accelerate the speed of pre-freeze;
4. the operating mode of compressor is more stable because compressor is that silicone oil is freezed all the time, so move more stable, handoff procedure back and forth not;
5. the anti-power failure ability of whole system is strong, because condenser coil inside is full of silicone oil, freeze dryer has a power failure suddenly, because the ratio of heat capacities of the inner silicone oil of coil pipe is bigger, can guarantee that power failure can not influence quality of item in the short time;
6. in goods, during the fewer or secondary lyophilization of water content, can close a compressor, can the temperature of condenser not impacted, not only energy-conservation but also prolonged service life of compressor.Because we design the refrigeration of condenser is that compressor freezes to silicone oil all the time, silicone oil freezes to condenser coil again, and promptly cold all concentrates in the silicone oil, so turn off a compressor, is constant for the frosting surface area of condenser.
Description of drawings
Fig. 1 is a kind of refrigerating method schematic diagram of vacuum freeze drier.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 1, refrigerating method schematic diagram for a kind of vacuum freeze drier, a kind of refrigerating method of vacuum freeze drier is: directly annotate silicone oil in the coil pipe 2 of the condenser 1 of freeze dryer, silicone oil flows to plate type heat exchanger 3 inside, and the silicone oil that compressor 4 starts plate type heat exchanger 3 inside freezes; Cooled silicone oil is got to by circulating pump 5 in the condenser coil 2 of condenser 1 inside, by the circulation repeatedly of silicone oil, thereby reaches the purpose that condenser coil 2 is freezed.
Claims (1)
1. the refrigerating method of a vacuum freeze drier, it is characterized in that, this method is: directly annotate silicone oil in the coil pipe (2) of the condenser (1) of freeze dryer, silicone oil flows to plate type heat exchanger (3) inside, and compressor (4) starts the inner silicone oil of plate type heat exchanger (3) is freezed; Cooled silicone oil is got in the inner condenser coil (2) of condenser (1) by circulating pump (5), by the circulation repeatedly of silicone oil, thereby reaches the purpose that condenser coil (2) is freezed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810035882XA CN101251309A (en) | 2008-04-10 | 2008-04-10 | Refrigerating method of vacuum freezing dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810035882XA CN101251309A (en) | 2008-04-10 | 2008-04-10 | Refrigerating method of vacuum freezing dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101251309A true CN101251309A (en) | 2008-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810035882XA Pending CN101251309A (en) | 2008-04-10 | 2008-04-10 | Refrigerating method of vacuum freezing dryer |
Country Status (1)
| Country | Link |
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| CN (1) | CN101251309A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222422A (en) * | 2015-09-22 | 2016-01-06 | 大连双瑞科技有限公司 | Double heat exchange cooling cycle system |
| CN105571367A (en) * | 2016-03-07 | 2016-05-11 | 上海东富龙制药设备制造有限公司 | Coil pipe structure |
| CN104534729B (en) * | 2014-06-13 | 2016-08-31 | 楚天科技股份有限公司 | A kind of refrigerating system of freeze dryer and the control method of this refrigeration system |
-
2008
- 2008-04-10 CN CNA200810035882XA patent/CN101251309A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534729B (en) * | 2014-06-13 | 2016-08-31 | 楚天科技股份有限公司 | A kind of refrigerating system of freeze dryer and the control method of this refrigeration system |
| CN105222422A (en) * | 2015-09-22 | 2016-01-06 | 大连双瑞科技有限公司 | Double heat exchange cooling cycle system |
| CN105222422B (en) * | 2015-09-22 | 2017-12-29 | 宋占涛 | Double heat exchange cooling cycle system |
| CN105571367A (en) * | 2016-03-07 | 2016-05-11 | 上海东富龙制药设备制造有限公司 | Coil pipe structure |
| CN105571367B (en) * | 2016-03-07 | 2018-05-04 | 上海东富龙制药设备制造有限公司 | A kind of coil arrangement |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080718 Address after: Shanghai city Minhang District Fanghe Road No. 2199 Applicant after: Shanghai Tofflon Science and Technology Co., Ltd. Address before: Shanghai city Minhang District Fanghe Road No. 2199 Applicant before: Dongfulong Science & Technology Co., Ltd., Shanghai |
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| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080827 |