CN105222422B - Double heat exchange cooling cycle system - Google Patents
Double heat exchange cooling cycle system Download PDFInfo
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- CN105222422B CN105222422B CN201510609032.6A CN201510609032A CN105222422B CN 105222422 B CN105222422 B CN 105222422B CN 201510609032 A CN201510609032 A CN 201510609032A CN 105222422 B CN105222422 B CN 105222422B
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- pipeline
- low temperature
- ball valve
- circulating pump
- pneumatic ball
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Abstract
The invention discloses a kind of double heat exchange cooling cycle system, including plate heat exchanger, systemic circulation pipeline circulating pump, low temperature pneumatic ball valve I, low temperature pneumatic ball valve II, partial circulating pipeline circulating pump, heater, check valve and pipeline, it is characterised in that：Each part is connected by pipeline, in pre-freeze early stage, opens systemic circulation pipeline circulating pump and low temperature pneumatic ball valve I forms preceding case shelf and the systemic circulation passage of condenser cooling coil one；During primary drying, low temperature pneumatic ball valve I is closed, partial circulating pipeline circulating pump is opened and low temperature pneumatic ball valve II forms preceding case shelf and two partial circulating passages of each self-loopa of condenser cooling coil.The present invention is coordinated by the pipeline of the circulatory system and each motor, the switch of valve allows heat transmission medium silicone oil to be cooled down to case shelf cooling before vacuum freeze drier or to condenser cooling coil.Pass through the accurate control for cooperating to realize shelf temperature and condenser temperature of each motor of the circulatory system, valve.
Description
Technical field
The present invention relates to refrigerating field, specifically a kind of double heat exchange cooling cycle system.
Background technology
At present, most of traditional freeze dryer is direct injection refrigeration modes, and being usually in the whole lyophilized technique operation phase will
Refrigerant direct cycles to direct expansion in cooling tube and absorbed heat, and reaches refrigeration.All it is to pass through switching in freeze-drying process
Refrigerant loop switches refrigeration object, and shelf temperature is typically by liquid supply electromagnetic valve control of freezing all the way, regulation.
The following defect of existing vacuum freeze drier direct injection refrigeration modes generally existing：
1) flaggy is cooled down with shelf cooler during pre-freeze, therefore must be by refrigerant loop before drying stage is entered
It is switched to condenser side and switches cooling object by switching refrigerant loop；
2) shelf temperature control performance is relatively low, compressor is poor to load change adaptation, and operation stability has to a certain degree
Reduce；
3) due to only having in condenser, refrigerant, thermal capacity are smaller, and refrigeration system easily breaks down, and causes temperature to rise
It hurry up, vacuum breaking is also very fast；
4) because process structure reason, condenser temperature are difficult to control, it is not easy to run defrost using heating silicone oil mode
Engineering.
For problem above, it is necessary to a kind of cooling cycle system is provided, to improve deficiency of the prior art.
The content of the invention
According to technical problem set forth above, and provide a kind of double heat exchange cooling cycle system.Main profit of the invention
With double heat exchange circulation technology, one when being pre-freeze early stage, by the one of plate heat exchanger, preceding case shelf and condenser coil
Circulation canal is systemic circulation passage；Another is two of preceding each self-loopa formation of case shelf and condenser coil when drying
Partial circulating passage；So as to realize effective control and regulation of shelf temperature, make compressor from freeze-drying process from starting to terminating to only have
One refrigerant loop, without switching refrigerant loop, to ensure the reliable and stable of the operating condition of compressor.
The technological means that the present invention uses is as follows：
A kind of double heat exchange cooling cycle system, including plate heat exchanger, systemic circulation pipeline circulating pump, low temperature Pneumatic ball
Valve I, low temperature pneumatic ball valve II, partial circulating pipeline circulating pump, heater, check valve and pipeline, it is characterised in that：
The plate heat exchanger outlet is connected by pipeline with condenser cooling coil entrance, the condenser cooling coil
Outlet is connected by pipeline with the partial circulating pipeline circulating pump, the check valve returns to the plate heat exchanger by pipeline again
Entrance；
The condenser cooling coil outlet is also connected by pipeline with the systemic circulation pipeline circulating pump, the heater
Preceding case shelf header inlet is entered by pipeline again, the preceding case shelf manifold outlet ports pass through pipeline and the low temperature pneumatic ball valve
I phase is connected back to the plate heat exchanger entrance；
Followed greatly with described in the pipeline being connected with the preceding case shelf manifold outlet ports and condenser cooling coil outlet
The pipeline being connected with the low temperature pneumatic ball valve II is additionally provided between the connected pipeline of endless tube road circulating pump；
During pre-freeze early stage, open the systemic circulation pipeline circulating pump and the low temperature pneumatic ball valve I form before case shelf with
The systemic circulation passage of condenser cooling coil one；
During primary drying, the low temperature pneumatic ball valve I is closed, opens the partial circulating pipeline circulating pump and the low temperature gas
Dynamic ball valve II forms the preceding case shelf and two partial circulating passages of each self-loopa of condenser cooling coil.
Further, during pre-freeze early stage, the silicone oil after plate heat exchanger cooling is gone out by the plate heat exchanger
The condensed device cooling coil entrance of mouth enters condenser, then is exported from condenser cooling coil through the systemic circulation pipeline circulating pump
Preceding case shelf header inlet is entered back into after entering the heater afterwards, then by preceding case shelf manifold outlet ports through the low temperature Pneumatic ball
Valve I returns to cooling of the plate heat exchanger entrance completion to preceding case shelf.
Further, during primary drying, two partial circulating passages are respectively：
One is the preceding case shelf heat cycles passage, and the preceding case shelf manifold outlet ports enter the low temperature Pneumatic ball
Valve II, the systemic circulation pipeline circulating pump, the heater return to the preceding case shelf header inlet and complete to put the preceding case
The heating of plate；
One is that condenser cooling coil cools down circulation canal, and silicone oil exports through the plate heat exchanger enters the condensation
Device cooling coil entrance enters condenser, then is exported from condenser cooling coil through the partial circulating pipeline circulating pump, the list
Cooling of the plate heat exchanger entrance completion to the condenser cooling coil is returned to after to valve.
In this stage, required according to lyophilized technique, refrigeration system is freezed to condenser cooling coil always, and this refrigeration pair
The switching of elephant is completed by double heat-exchange system.Realize, make not by the method for work of switching refrigerant loop
Compressor is from freeze-drying process from starting to an only refrigerant loop is terminated.Without switching refrigerant loop, to ensure to compress
The operating condition of machine it is reliable and stable.
Have a power failure as dashed forward to meet in freeze-drying process, of short duration vacuum can be carried out by the cooling silicone oil in condenser coil and tieed up
Hold, system vacuum is not had too big fluctuation.
Further, the unlatching and stopping that the circulatory system is circulated by motor and Valve controlling, when the preceding case is put
When plate is cooled to preset temperature, partial circulating is switched to freeze.
Double heat exchange circulation system is set to form systemic circulation system by the switching of motor, valve when freeze-drying system brings into operation
System, case shelf before refrigerant is cooled down by carrying out heat exchange in plate heat exchanger and silicone oil, treats that shelf temperature reaches setting value,
System is freezed to condenser cooling coil into partial circulating by motor, valve transfer, beats limiting temperature.Current box shelf temperature
When degree deviates setting value, by controlling the switch of low temperature pneumatic ball valve I come the temperature of adjustment control shelf, make shelf temperature steady
Surely operate in controlling value.
Compared with the prior art, in the present invention, after silicone oil carries out heat exchange, pipeline and each electricity by the circulatory system
Machine, the switch of valve, which coordinate, allows heat transmission medium silicone oil to be cooled down to case shelf cooling before vacuum freeze drier or to condenser
Coil pipe cools down.Pass through the accurate control for cooperating to realize shelf temperature and condenser temperature of each motor of the circulatory system, valve
System.
The present invention has advantages below：
1) it ensure that refrigeration system refrigerant loop in whole lyophilized technique process is single loop, it is not necessary to refrigerant
Loop switches over.
2) load change drastically is adapted to；Vacuum holding capacity increases during the system failure.
3) when low temperature operates, it can reach by conduction oil to supplement load, ensure compressor stable operation.
4) the condensing surface product of condenser is effectively maintained.
5) temperature of condenser can be controlled, and can realize defrosting engineering by heating silicone oil.
6) shelf temperature is easily controlled, and the temperature homogeneity of flaggy is improved.
Double heat exchange cooling cycle system of the invention for the foregoing reasons may be directly applied to vacuum freeze drier, carry
The uniformity of preceding case shelf and condenser cooling coil temperature in high equipment, and then the main performance of machine is improved, the present invention is also
It can be applied to be used for cold and the device of heat exchange in other equipment.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the schematic flow sheet of the present invention.
In figure：1st, plate heat exchanger 11, plate heat exchanger entrance 12, plate heat exchanger outlet 13, refrigerant exit 14, compression
Machine gas returning port 2, systemic circulation pipeline circulating pump 3, low temperature pneumatic ball valve I 4, partial circulating pipeline circulating pump 5, low temperature pneumatic ball valve II 6,
Heater 7, check valve 81, preceding case shelf header inlet 82, preceding case shelf manifold outlet ports 91, condenser cooling coil entrance 92,
Condenser cooling coil exports.
Embodiment
As shown in figure 1, a kind of double heat exchange cooling cycle system, including plate heat exchanger 1, systemic circulation pipeline circulating pump
2nd, low temperature pneumatic ball valve I 3, low temperature pneumatic ball valve II 5, partial circulating pipeline circulating pump 4, heater 6, check valve 7 and pipeline, it is described
Plate heat exchanger outlet 12 is connected by pipeline with condenser cooling coil entrance 91, and the condenser cooling coil outlet 92 is logical
Cross pipeline and be connected with the partial circulating pipeline circulating pump 4, the check valve 7 and the plate heat exchanger entrance is returned to by pipeline again
11, plate heat exchanger 1 is also provided with refrigerant exit 13 and compressor return air mouth 14 simultaneously.
Condenser cooling coil outlet 92 by pipeline also with the systemic circulation pipeline circulating pump 2, the heater 6
Be connected and preceding case shelf header inlet 81 entered by pipeline again, the preceding case shelf manifold outlet ports 82 by pipeline with it is described low
The warm phase of pneumatic ball valve I 3 is connected back to the plate heat exchanger entrance 11；
The pipeline being connected with the preceding case shelf manifold outlet ports 82 and the condenser cooling coil outlet 92 with it is described
The pipeline being connected with the low temperature pneumatic ball valve II 5 is additionally provided between the connected pipeline of systemic circulation pipeline circulating pump 2；
During pre-freeze early stage, case shelf before the systemic circulation pipeline circulating pump 2 and the low temperature pneumatic ball valve I 3 composition is opened
With the systemic circulation passage of condenser cooling coil one；Silicone oil i.e. after the plate heat exchanger 1 cooling board-like is changed by described
Hot device exports 12 condensed device cooling coil entrances 91 and enters condenser, then is followed greatly through described from condenser cooling coil outlet 92
Preceding case shelf header inlet 81 is entered back into after entering the heater 6 after endless tube road circulating pump 2, then by preceding case shelf manifold outlet ports
82 return to the plate heat exchanger entrance 11 through the low temperature pneumatic ball valve I 3 completes cooling to preceding case shelf.
During primary drying, the low temperature pneumatic ball valve I 3 is closed, opens the partial circulating pipeline circulating pump 4 and the low temperature
Pneumatic ball valve II 5 forms the preceding case shelf and two partial circulating passages of each self-loopa of condenser cooling coil, respectively
For：
One is the preceding case shelf heat cycles passage, and it is pneumatic that the preceding case shelf manifold outlet ports 82 enter the low temperature
Ball valve II 5, the systemic circulation pipeline circulating pump 2, the heater 6 return to the preceding case shelf header inlet 81 and completed to described
The heating of preceding case shelf；
One is that condenser cooling coil cools down circulation canal, and the silicone oil after cooling enters through plate heat exchanger outlet 12
Enter the condenser cooling coil entrance 91 and enter condenser, then from the outlet 92 of condenser cooling coil through the small circulating pipe
The plate heat exchanger entrance 11 is returned to after road circulating pump 4, the check valve 7 to complete to the cold of the condenser cooling coil
But.
In this stage, required according to lyophilized technique, refrigeration system is freezed to condenser cooling coil always, and this refrigeration pair
The switching of elephant is completed by double heat-exchange system.Realize, make not by the method for work of switching refrigerant loop
Compressor is from freeze-drying process from starting to an only refrigerant loop is terminated.Without switching refrigerant loop, to ensure to compress
The operating condition of machine it is reliable and stable.
Have a power failure as dashed forward to meet in freeze-drying process, of short duration vacuum can be carried out by the cooling silicone oil in condenser coil and tieed up
Hold, system vacuum is not had too big fluctuation.
Further, the unlatching and stopping that the circulatory system is circulated by motor and Valve controlling, when the preceding case is put
When plate is cooled to preset temperature, partial circulating is switched to freeze.
Double heat exchange circulation system is set to form systemic circulation system by the switching of motor, valve when freeze-drying system brings into operation
System, case shelf before refrigerant is cooled down by carrying out heat exchange in plate heat exchanger 1 and silicone oil, treats that shelf temperature reaches setting
Value, system is freezed to condenser cooling coil into partial circulating by motor, valve transfer, beats limiting temperature.Current box shelf
During temperature departure setting value, by controlling the switch of low temperature pneumatic ball valve I 3 come the temperature of adjustment control shelf, make shelf temperature
Stable operation is spent in controlling value.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (4)
1. a kind of double heat exchange cooling cycle system, including plate heat exchanger, systemic circulation pipeline circulating pump, low temperature pneumatic ball valve
Ith, low temperature pneumatic ball valve II, partial circulating pipeline circulating pump, heater, check valve and pipeline, it is characterised in that：
The plate heat exchanger outlet is connected by pipeline with condenser cooling coil entrance, the condenser cooling coil outlet
It is connected by pipeline with the partial circulating pipeline circulating pump, the check valve and the plate heat exchanger is returned to by pipeline again enters
Mouthful；
The condenser cooling coil outlet is also connected and led to again with the systemic circulation pipeline circulating pump, the heater by pipeline
Cross pipeline and enter preceding case shelf header inlet, the preceding case shelf manifold outlet ports pass through pipeline and the phase of low temperature pneumatic ball valve I
It is connected back to the plate heat exchanger entrance；
In the pipeline being connected with the preceding case shelf manifold outlet ports and condenser cooling coil outlet and the systemic circulation pipe
The pipeline being connected with the low temperature pneumatic ball valve II is additionally provided between the connected pipeline of road circulating pump；
During pre-freeze early stage, open the systemic circulation pipeline circulating pump and the low temperature pneumatic ball valve I forms preceding case shelf and condensation
The systemic circulation passage of device cooling coil one；
During primary drying, the low temperature pneumatic ball valve I is closed, opens the partial circulating pipeline circulating pump and the low temperature Pneumatic ball
Valve II forms the preceding case shelf and two partial circulating passages of each self-loopa of condenser cooling coil.
2. double heat exchange cooling cycle system according to claim 1, it is characterised in that：During pre-freeze early stage, through described
Silicone oil after plate heat exchanger cooling exports condensed device cooling coil entrance by the plate heat exchanger and enters condenser, then
Enter after the heater case shelf collection before entering back into after the systemic circulation pipeline circulating pump from the outlet of condenser cooling coil
Tube inlet, then return to the plate heat exchanger entrance through the low temperature pneumatic ball valve I by preceding case shelf manifold outlet ports and complete to preceding
The cooling of case shelf.
3. double heat exchange cooling cycle system according to claim 1, it is characterised in that：It is two small during primary drying
Circulation canal is respectively：
One is the preceding case shelf heat cycles passage, and the preceding case shelf manifold outlet ports enter the low temperature pneumatic ball valve
IIth, the systemic circulation pipeline circulating pump, the heater return to the preceding case shelf header inlet and completed to the preceding case shelf
Heating；
One is that condenser cooling coil cools down circulation canal, and silicone oil exports cold into the condenser through the plate heat exchanger
But coil inlet enters condenser, then is exported from condenser cooling coil through the partial circulating pipeline circulating pump, the check valve
Cooling of the plate heat exchanger entrance completion to the condenser cooling coil is returned to afterwards.
4. double heat exchange cooling cycle system according to claim 1, it is characterised in that：The circulatory system passes through electricity
Machine and the unlatching and stopping of Valve controlling circulation, when the preceding case shelf is cooled to preset temperature, switch to partial circulating to freeze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609032.6A CN105222422B (en) | 2015-09-22 | 2015-09-22 | Double heat exchange cooling cycle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609032.6A CN105222422B (en) | 2015-09-22 | 2015-09-22 | Double heat exchange cooling cycle system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105222422A CN105222422A (en) | 2016-01-06 |
| CN105222422B true CN105222422B (en) | 2017-12-29 |
Family
ID=54991534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510609032.6A Expired - Fee Related CN105222422B (en) | 2015-09-22 | 2015-09-22 | Double heat exchange cooling cycle system |
Country Status (1)
| Country | Link |
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| CN (1) | CN105222422B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106036833B (en) * | 2016-05-30 | 2019-10-11 | 江苏哈工药机科技股份有限公司 | Material circulating system and round-robin method in a kind of production of colla corii asini cake |
| CN110081675B (en) * | 2018-01-25 | 2023-11-24 | 郑州大学 | Novel cold and hot integrated system of freeze dryer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2695888Y (en) * | 2004-04-29 | 2005-04-27 | 上海远东制药机械总厂 | Vacuum freezing drier |
| CN101251309A (en) * | 2008-04-10 | 2008-08-27 | 上海东富龙科技有限公司 | Refrigerating method of vacuum freezing dryer |
| US7640756B2 (en) * | 2005-06-14 | 2010-01-05 | American Air Liquide, Inc. | Lyophilization unit with liquid nitrogen cooling |
| CN203857704U (en) * | 2014-06-04 | 2014-10-01 | 大连双瑞科技有限公司 | Refrigerating system and vacuum freezing drying machine using same |
| CN104296502A (en) * | 2013-07-19 | 2015-01-21 | 北京四环科学仪器厂有限公司 | Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically |
-
2015
- 2015-09-22 CN CN201510609032.6A patent/CN105222422B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2695888Y (en) * | 2004-04-29 | 2005-04-27 | 上海远东制药机械总厂 | Vacuum freezing drier |
| US7640756B2 (en) * | 2005-06-14 | 2010-01-05 | American Air Liquide, Inc. | Lyophilization unit with liquid nitrogen cooling |
| CN101251309A (en) * | 2008-04-10 | 2008-08-27 | 上海东富龙科技有限公司 | Refrigerating method of vacuum freezing dryer |
| CN104296502A (en) * | 2013-07-19 | 2015-01-21 | 北京四环科学仪器厂有限公司 | Vacuum freeze drier refrigerating system capable of operating continuously and carrying out defrosting automatically |
| CN203857704U (en) * | 2014-06-04 | 2014-10-01 | 大连双瑞科技有限公司 | Refrigerating system and vacuum freezing drying machine using same |
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| Publication number | Publication date |
|---|---|
| CN105222422A (en) | 2016-01-06 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20160205 Address after: 116000 Liaoning, Dalian, Jinzhou New District, northeast street, No. seven, -5-10, 10 Applicant after: Song Zhantao Address before: 116000 Liaoning, Dalian, Jinzhou New District, northeast street, No. seven, -5-10, 10 Applicant before: DALIAN TIANREY SCIENCE & TECHNOLOGY CO.,LTD. |
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Granted publication date: 20171229 Termination date: 20210922 |