CN104296502A - Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically - Google Patents
Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically Download PDFInfo
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- CN104296502A CN104296502A CN201310302748.2A CN201310302748A CN104296502A CN 104296502 A CN104296502 A CN 104296502A CN 201310302748 A CN201310302748 A CN 201310302748A CN 104296502 A CN104296502 A CN 104296502A
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Abstract
The invention relates to a vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically. The vacuum freeze drier refrigerating system is formed by coupling a high temperature stage refrigerating system with a low temperature stage refrigerating system, wherein the high temperature stage refrigerating system is formed by connecting a high temperature stage compressor, a condenser, a filter, a throttling valve and an evaporative condenser in series, and the low temperature stage refrigerating system is formed by connecting a low temperature stage compressor, an oil separator, an overheating cooler, a solenoid valve, a filter, a throttling valve, a hand valve, a plate heat exchanger, a silicone oil circulating pump, a one-way valve, a vacuum pump, an expansion vessel, a drying chamber and a cold trap in series. The vacuum freeze drier refrigerating system has the function of carrying out thermal defrosting on a cold trap pipe coil in the continuous pre-freezing process, guarantees that a freeze drier can freeze and dry multiple batches of materials continuously, increases the utilization rate of the freeze drier, improves the production capacity of the freeze drier and saves energy.
Description
Technical field
The present invention relates to a kind of refrigeration system of vacuum freeze drier, water-bearing articles is freezed in advance, then under certain vacuum state, make water sublimed thus realize low temperature dewatering to obtain dry goods, belong to vacuum freeze drier technical field.
Background technology
Vacuum freeze drying is that water-bearing articles is freezed in advance, under certain vacuum state, then makes its ice crystal distil thus realize low temperature dewatering to obtain dry goods.
Vacuum freeze-drying method is compared compared to methods such as traditional oven dry, spraying dry has quite outstanding advantage:
1, the growth of microorganism etc. almost cannot be carried out, and meets hygienic requirements;
2, biologically active, color, local flavor and fragrance can be kept after freeze drying;
3, freezing dry process can reduce the loss of volatility and heat-sensitive substance, can keep the original character of material well;
4, dry rear form is substantially constant, in Sponge Porosity structure; Rehydration is easy, can promptly be reduced into original proterties;
5, the moisture of in sample 95% ~ 99% can be removed, not oxidizable, goods long shelf-life.
Vacuum freeze drying relates to botany, medical science, virology, bromatology, archaeology etc.
Numerous ambit, wide application.Be applicable to the freeze drying of bacterium, virus, microorganism, vaccine and medicine etc.
Traditional freeze drier needs to shut down after freezing dry process terminates, and carry out defrosting process to cold-trap coil pipe, then carry out the freeze drying program of next batch material, the freeze drying interval of two batches of freeze-dried materials is longer, operating efficiency is lower.In order to improve freeze drier operating efficiency, power generating ratio number of times, shorten downtime; enable freeze drier continuous operation; generally all need the special cold-trap of design and installation to heat defrosting device and install two cold-traps or many cold-trap structures additional, causing freeze drier system architecture complexity, cost higher.
Summary of the invention
The object of this invention is to provide a kind of vacuum freeze drier refrigeration system of the band automatic defrosting function that runs without interruption.
Technical scheme of the present invention is: a kind of vacuum freeze drier refrigeration system of the band automatic defrosting function that runs without interruption, comprise the high-temperature level compressor (1) that high-temperature level refrigeration system pipeline connects, condenser (2), filter (3), choke valve (4), the low-temperature level compressor (6) that evaporative condenser (5) and low-temperature level refrigeration system pipeline connect, oil eliminator (7), overheated cooler (8), magnetic valve (9, 11, 16, 18, 21, 24), filter (10), choke valve (12, 17, 19), hand-operated valve (13), plate type heat exchanger (14), oil circulation pump (15), check valve (20, 25), vavuum pump (22), expansion vessel (23), hothouse (26), cold-trap (27).
The outlet of described high-temperature level compressor (1) is connected with condenser (2) entrance, the outlet of condenser (2) is connected with the entrance of filter (3), the outlet of filter (3) is connected with the entrance of choke valve (4), the outlet of choke valve (4) is connected with the entrance of evaporative condenser (5), and the outlet of evaporative condenser (5) is connected with the entrance of high-temperature level compressor (1).
The outlet of described low-temperature level compressor (6) is connected with the entrance of oil eliminator (7), the outlet of oil eliminator (7) is connected with the entrance of overheated cooler (8), the outlet of overheated cooler (8) divides two-way, and a road is connected with the entrance of magnetic valve (9); One tunnel is connected with the entrance of magnetic valve (24).The outlet of magnetic valve (9) is connected with the entrance of filter (10), the outlet of filter (10) is connected with the entrance of condenser/evaporator (5) condensation side, and the outlet of condenser/evaporator (5) condensation side divides two-way to be connected respectively to hothouse (26) side and cold-trap (27) side.Connect being connected with the entrance of magnetic valve (11) by the outlet of evaporative condenser (5) condensation side of hothouse (26) side, the outlet of magnetic valve (11) is connected with the entrance of choke valve (12), the outlet of choke valve (12) is connected with the entrance of hand-operated valve (13), the outlet of hand-operated valve (13) is connected with the entrance of plate type heat exchanger (14) evaporation side, and the outlet of plate type heat exchanger (14) evaporation side is connected with the entrance of low-temperature level compressor (6).Connect being connected with the entrance of magnetic valve (18) by the outlet of evaporative condenser (5) condensation side of cold-trap (27) side, the outlet of magnetic valve (18) is connected with the entrance of choke valve (19), the outlet of choke valve (19) is connected with the entrance of check valve (20), the outlet of check valve (20) is connected with the entrance of cold-trap (27) coil pipe, the outlet of cold-trap (27) coil pipe is connected with the entrance of magnetic valve (21), the outlet of magnetic valve (21) is connected with the entrance of low-temperature level compressor (6), the outlet of expansion vessel (23) is connected with the entrance of low-temperature level compressor (6).
Described reheater condenser (8) of crossing is connected with magnetic valve (24) with between cold-trap (27) coil inlet, be connected with check valve (25) between cold-trap (27) coil outlets with filter (10) entrance, be connected with magnetic valve (21) between cold-trap (27) coil outlets with low-temperature level compressor (6) entrance.
Advantage of the present invention is:
1, do not need after needing freeze-dried material freezing dry process to terminate to shut down, directly carry out the freezing dry process of next batch freeze-dried material, shorten the freeze drying interval of each batch of freeze-dried material widely, improve production efficiency and output;
2, native system was together in series cold-trap and freeze drying box operation at cryodesiccated pre-freeze process initial stage again, increased the area of dissipation of low-temperature level refrigeration system, can increase the degree of supercooling of refrigeration system, improve the refrigerating capacity of system, strengthen system pre-freeze effect;
3, compared to traditional non-stop run freeze drier, The present invention reduces extra cold-trap coil defrost system and two cold-trap and many cold-traps system, saved the energy, simplified the structure;
4, native system cold-trap coil temperature and environment temperature are substantially suitable in pre-freeze process again, can not impact freezing dry process below.
Accompanying drawing explanation
Figure is a kind of vacuum freeze drier refrigeration system schematic diagram of the band automatic defrosting function that runs without interruption.
Detailed description of the invention
The invention will be further described in conjunction with the accompanying drawings and embodiments.
Embodiment
As shown in the figure, energy of the present invention runs without interruption and the cooling cycle system of the vacuum freeze drier of band automatic defrosting, comprise the high-temperature level compressor (1) that high-temperature level refrigeration system pipeline connects, condenser (2), filter (3), choke valve (4), the low-temperature level compressor (6) that evaporative condenser (5) and low-temperature level refrigeration system pipeline connect, oil eliminator (7), overheated cooler (8), magnetic valve (9, 11, 16, 18, 21, 24), filter (10), choke valve (12, 17, 19), hand-operated valve (13), plate type heat exchanger (14), oil circulation pump (15), check valve (20, 25), vavuum pump (22), expansion vessel (23), hothouse (26), cold-trap (27).The outlet of described high-temperature level compressor (1) is connected with condenser (2) entrance, the outlet of condenser (2) is connected with the entrance of filter (3), the outlet of filter (3) is connected with the entrance of choke valve (4), the outlet of choke valve (4) is connected with the entrance of evaporative condenser (5), and the outlet of evaporative condenser (5) is connected with the entrance of high-temperature level compressor (1).
The outlet of described low-temperature level compressor (6) is connected with the entrance of oil eliminator (7), the outlet of oil eliminator (7) is connected with the entrance of overheated cooler (8), the outlet of overheated cooler (8) divides two-way, and a road is connected with the entrance of magnetic valve (9); One tunnel is connected with the entrance of magnetic valve (24).The outlet of magnetic valve (9) is connected with the entrance of filter (10), the outlet of filter (10) is connected with the entrance of condenser/evaporator (5) condensation side, and the outlet of condenser/evaporator (5) condensation side divides two-way to be connected respectively to hothouse (26) side and cold-trap (27) side.Connect being connected with the entrance of magnetic valve (11) by the outlet of evaporative condenser (5) condensation side of hothouse (26) side, the outlet of magnetic valve (11) is connected with the entrance of choke valve (12), the outlet of choke valve (12) is connected with the entrance of hand-operated valve (13), the outlet of hand-operated valve (13) is connected with the entrance of plate type heat exchanger (14) evaporation side, and the outlet of plate type heat exchanger (14) evaporation side is connected with the entrance of low-temperature level compressor (6).Connect being connected with the entrance of magnetic valve (18) by the outlet of evaporative condenser (5) condensation side of cold-trap (27) side, the outlet of magnetic valve (18) is connected with the entrance of choke valve (19), the outlet of choke valve (19) is connected with the entrance of check valve (20), the outlet of check valve (20) is connected with the entrance of cold-trap (27) coil pipe, the outlet of cold-trap (27) coil pipe is connected with the entrance of magnetic valve (21), the outlet of magnetic valve (21) is connected with the entrance of low-temperature level compressor (6), the outlet of expansion vessel (23) is connected with the entrance of low-temperature level compressor (6).
Described reheater condenser (8) of crossing is connected with magnetic valve (24) with between cold-trap (27) coil inlet, be connected with check valve (25) between cold-trap (27) coil outlets with filter (10) entrance, be connected with magnetic valve (21) between cold-trap (27) coil outlets with low-temperature level compressor (6) entrance.
Its course of work is: when normal freeze-drying process starts, in high-temperature level compressor (1), high-temperature high-pressure refrigerant out enters in filter (3) after condensation in condenser (2), then after choke valve (4) throttling, enter the evaporation side heat absorption of evaporative condenser (5), after get back to high-temperature level compressor (1) suction side complete the circulation of high-temperature level refrigeration system.When after high-temperature level refrigeration system cloud gray model a period of time, low-temperature level refrigeration system starts, now magnetic valve (16) and (24) are closed, and magnetic valve (9), (11), (18) and (21) are opened.Be condensed in overheated cooler (8) after oil eliminator (7) point oil by high-temperature high-pressure refrigerant out in low-temperature level compressor (6), then the condensation side arriving evaporative condenser (5) after magnetic valve (9) and filter (10) is lowered the temperature further, and then cold-producing medium is divided into two-way and enters hothouse (26) and cold-trap (27) respectively.One road cold-producing medium by magnetic valve (11) after choke valve (12) throttling manually valve (13) enter plate type heat exchanger (14) in hothouse (26) shelf silicone oil lower the temperature, silicone oil is flowed by operating between plate type heat exchanger (14) and hothouse (26) interior shelf of oil circulation pump (15), for giving the cooling of material pre-freeze, in plate type heat exchanger (14), the suction side of low-temperature level compressor (6) then directly got back to by endothermic gasification cold-producing medium out; Another road cold-producing medium then through magnetic valve (18) in choke valve (19) by throttling, then enter in cold-trap (27) coil pipe through check valve (20), directly to cold-trap (27) cooling, in cold-trap (27), after magnetic valve (21), after endothermic gasification, get back to the suction side of low-temperature level compressor (6).When shelf temperature drops to a certain degree, magnetic valve (18) cuts out, and all low-temperature refrigerants all enter plate type heat exchanger (14) by magnetic valve (11) and lower the temperature, to material pre-freeze to silicone oil; After pre-freeze process terminates, magnetic valve (18) is opened, magnetic valve (11) cuts out, all low-temperature refrigerants all enter cold-trap (27) coil pipe by magnetic valve (18), to cold-trap (27) cooling, after cold-trap (27) temperature arrives-80 DEG C, open vavuum pump (22) and carry out process of vacuum drying, until material is completely dried, complete a normal freeze-drying process.After material is completely dried, material is taken out from cryodesiccation chamber, again put into the new freeze-dried material that needs and carry out pre-freeze, now magnetic valve (9), magnetic valve (21) and magnetic valve (18) are closed, magnetic valve (24) is opened, allow from low-temperature level compressor (6) high-temperature high-pressure refrigerant out and arrive cold-trap (27) coil pipe through oil eliminator (7) with after crossing cold cooler (8) condensation, enter the condensation side of evaporative condenser (5) through filter (10) after absorption coil adhering to the heat of ice, cold-producing medium after cooling after magnetic valve (11) in choke valve (12) by throttling, cold-producing medium after throttling enters silicone oil plate type heat exchanger (14) through hand-operated valve (13) and lowers the temperature to silicone oil, lowered the temperature to fresh sample by the continuous running of oil circulation pump (15).When frost in cold-trap (27) melts completely, magnetic valve (9) and magnetic valve (21) are opened, and magnetic valve (24) cuts out, and system routinely freezing dry process is run.
Claims (4)
1. the vacuum freeze drier cooling cycle system of band automatic defrosting function that can run without interruption, comprise the high-temperature level compressor (1) that high-temperature level refrigeration system pipeline connects, condenser (2), filter (3), choke valve (4), the low-temperature level compressor (6) that evaporative condenser (5) and low-temperature level refrigeration system pipeline connect, oil eliminator (7), overheated cooler (8), magnetic valve (9, 11, 16, 18, 21, 24), filter (10), choke valve (12, 17, 19), hand-operated valve (13), plate type heat exchanger (14), oil circulation pump (15), check valve (20, 25), vavuum pump (22), expansion vessel (23), hothouse (26), cold-trap (27).
2. high-temperature level refrigeration system as claimed in claim 1, it is characterized in that, the outlet of described high-temperature level compressor (1) is connected with condenser (2) entrance, the outlet of condenser (2) is connected with the entrance of filter (3), the outlet of filter (3) is connected with the entrance of choke valve (4), the outlet of choke valve (4) is connected with the entrance of evaporative condenser (5), and the outlet of evaporative condenser (5) is connected with the entrance of high-temperature level compressor (1).
3. low-temperature level refrigeration system as claimed in claim 1, it is characterized in that, the outlet of described low-temperature level compressor (6) is connected with the entrance of oil eliminator (7), the outlet of oil eliminator (7) is connected with the entrance of overheated cooler (8), the outlet of overheated cooler (8) divides two-way, and a road is connected with the entrance of magnetic valve (9); One tunnel is connected with the entrance of magnetic valve (24).The outlet of magnetic valve (9) is connected with the entrance of filter (10), the outlet of filter (10) is connected with the entrance of condenser/evaporator (5) condensation side, and the outlet of condenser/evaporator (5) condensation side divides two-way to be connected respectively to hothouse (26) side and cold-trap (27) side.Connect being connected with the entrance of magnetic valve (11) by the outlet of evaporative condenser (5) condensation side of hothouse (26) side, the outlet of magnetic valve (11) is connected with the entrance of choke valve (12), the outlet of choke valve (12) is connected with the entrance of hand-operated valve (13), the outlet of hand-operated valve (13) is connected with the entrance of plate type heat exchanger (14) evaporation side, and the outlet of plate type heat exchanger (14) evaporation side is connected with the entrance of low-temperature level compressor (6).Connect being connected with the entrance of magnetic valve (18) by the outlet of evaporative condenser (5) condensation side of cold-trap (27) side, the outlet of magnetic valve (18) is connected with the entrance of choke valve (19), the outlet of choke valve (19) is connected with the entrance of check valve (20), the outlet of check valve (20) is connected with the entrance of cold-trap (27) coil pipe, the outlet of cold-trap (27) coil pipe is connected with the entrance of magnetic valve (21), the outlet of magnetic valve (21) is connected with the entrance of low-temperature level compressor (6), the outlet of expansion vessel (23) is connected with the entrance of low-temperature level compressor (6).
4. low-temperature level refrigeration system as claimed in claim 1, it is characterized in that being connected with magnetic valve (24) between reheater condenser (8) with cold-trap (27) coil inlet, be connected with check valve (25) between cold-trap (27) coil outlets with filter (10) entrance.Be connected with magnetic valve (21) between cold-trap (27) coil outlets with low-temperature level compressor (6) entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310302748.2A CN104296502A (en) | 2013-07-19 | 2013-07-19 | Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310302748.2A CN104296502A (en) | 2013-07-19 | 2013-07-19 | Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically |
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| CN201310302748.2A Pending CN104296502A (en) | 2013-07-19 | 2013-07-19 | Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically |
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Cited By (4)
| 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 |
| CN107120957A (en) * | 2017-05-16 | 2017-09-01 | 太极集团四川太极制药有限公司 | Injection solvent collection system and the freeze-drying system for including this system |
| CN108007075A (en) * | 2017-10-16 | 2018-05-08 | 浙江冠峰食品机械有限公司 | The defrosting de-icing method of vacuum freeze drier system and the system |
| WO2018086474A1 (en) * | 2016-11-11 | 2018-05-17 | 中国科学院理化技术研究所 | Low-temperature rapid freeze-drying system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264659A (en) * | 1998-03-09 | 1999-09-28 | Hal Co Division Of Sp Ind Inc | Method and device for freeze drying |
| CN1987314A (en) * | 2006-12-19 | 2007-06-27 | 景建军 | Integrated machine for vacuum freezing and drying |
| CN101832691A (en) * | 2010-04-12 | 2010-09-15 | 大连三洋压缩机有限公司 | Air-cooled immersion type refrigerating plant and control method of refrigerating plant |
| CN102232166A (en) * | 2009-09-30 | 2011-11-02 | 赛默飞世尔科技(阿什维尔)有限责任公司 | Refrigeration system having a variable speed compressor |
| US20110283717A1 (en) * | 2006-09-08 | 2011-11-24 | Alan Cheng | Method for lyophilization using cryogenic refrigeration system |
| KR20120000276A (en) * | 2010-06-25 | 2012-01-02 | (주)피엠테크 | Dehumidification apparatus for vacuum freezing drier and dehumidification method using the same |
| CN202582135U (en) * | 2012-05-06 | 2012-12-05 | 蔡英杰 | Energy-saving system of freeze dryer |
| CN103196252A (en) * | 2012-01-10 | 2013-07-10 | Lg电子株式会社 | Cascade heat pump |
-
2013
- 2013-07-19 CN CN201310302748.2A patent/CN104296502A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264659A (en) * | 1998-03-09 | 1999-09-28 | Hal Co Division Of Sp Ind Inc | Method and device for freeze drying |
| US20110283717A1 (en) * | 2006-09-08 | 2011-11-24 | Alan Cheng | Method for lyophilization using cryogenic refrigeration system |
| CN1987314A (en) * | 2006-12-19 | 2007-06-27 | 景建军 | Integrated machine for vacuum freezing and drying |
| CN102232166A (en) * | 2009-09-30 | 2011-11-02 | 赛默飞世尔科技(阿什维尔)有限责任公司 | Refrigeration system having a variable speed compressor |
| CN101832691A (en) * | 2010-04-12 | 2010-09-15 | 大连三洋压缩机有限公司 | Air-cooled immersion type refrigerating plant and control method of refrigerating plant |
| KR20120000276A (en) * | 2010-06-25 | 2012-01-02 | (주)피엠테크 | Dehumidification apparatus for vacuum freezing drier and dehumidification method using the same |
| CN103196252A (en) * | 2012-01-10 | 2013-07-10 | Lg电子株式会社 | Cascade heat pump |
| CN202582135U (en) * | 2012-05-06 | 2012-12-05 | 蔡英杰 | Energy-saving system of freeze dryer |
Cited By (6)
| 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 |
| CN105222422B (en) * | 2015-09-22 | 2017-12-29 | 宋占涛 | Double heat exchange cooling cycle system |
| WO2018086474A1 (en) * | 2016-11-11 | 2018-05-17 | 中国科学院理化技术研究所 | Low-temperature rapid freeze-drying system |
| US10900713B2 (en) | 2016-11-11 | 2021-01-26 | Technical Institute Of Physics And Chemistry, Chinese Academy Of Sciences | Low-temperature quick-freezing freeze-drying system |
| CN107120957A (en) * | 2017-05-16 | 2017-09-01 | 太极集团四川太极制药有限公司 | Injection solvent collection system and the freeze-drying system for including this system |
| CN108007075A (en) * | 2017-10-16 | 2018-05-08 | 浙江冠峰食品机械有限公司 | The defrosting de-icing method of vacuum freeze drier system and the system |
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