CN105222422A - Double heat exchange cooling cycle system - Google Patents
Double heat exchange cooling cycle system Download PDFInfo
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- CN105222422A CN105222422A CN201510609032.6A CN201510609032A CN105222422A CN 105222422 A CN105222422 A CN 105222422A CN 201510609032 A CN201510609032 A CN 201510609032A CN 105222422 A CN105222422 A CN 105222422A
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- pipeline
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- cooling coil
- ball valve
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Abstract
The invention discloses a kind of double heat exchange cooling cycle system, comprise 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 characterized in that: each parts are connected by pipeline, when pre-freeze in early stage, unlatching systemic circulation pipeline circulating pump and low temperature pneumatic ball valve I form the systemic circulation passage of front case shelf and condenser cooling coil one; During primary drying, close low temperature pneumatic ball valve I, unlatching partial circulating pipeline circulating pump and low temperature pneumatic ball valve II form two partial circulating passages of front case shelf and each self-loopa of condenser cooling coil.The present invention is coordinated by the switch of the pipeline of the circulatory system and each motor, valve allows heat transmission medium silicone oil come to case shelf cooling before vacuum freeze drier or to the cooling of condenser cooling coil.The accurate control of shelf temperature and condenser temperature is realized by each motor of the circulatory system, cooperatively interacting of 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, traditional freeze dryer great majority are direct injection refrigeration modes, be generally cold-producing medium is direct cycled to direct expansion heat absorption in cooling tube, and reach refrigeration in the whole freeze-dry process operation phase.Be all switch refrigeration object by switching refrigerant loop in freeze-drying process, shelf temperature generally controls by a road refrigeration liquid supply electromagnetic valve, regulates.
The following defect of existing vacuum freeze drier direct injection refrigeration modes ubiquity:
1) cool flaggy with shelf cooler during pre-freeze, before entering drying stage, therefore refrigerant loop must being switched to condenser side switching cooling object by switching refrigerant loop;
2) lower, the compressor of shelf temperature control performance adapts to poor to load change, and operation stability has and to a certain degree reduces;
3) owing to only having cold-producing medium, thermal capacity smaller in condenser, refrigeration system easily breaks down, and cause temperature to rise fast, vacuum breaking is also very fast;
4) due to process structure reason, condenser temperature is wayward, not easily adopts heating silicone oil mode to run defrost engineering.
For above problem, be necessary to provide a kind of cooling cycle system, to improve deficiency of the prior art.
Summary of the invention
According to the technical problem of above-mentioned proposition, and provide a kind of double heat exchange cooling cycle system.The present invention mainly utilizes double heat exchange circulation technology, one be early stage pre-freeze time, by one circulation canal and the systemic circulation passage of plate heat exchanger, front case shelf and condenser coil; Another is when drying, two partial circulating passages that front case shelf and each self-loopa of condenser coil are formed; Thus realize effective control and regulation of shelf temperature, make compressor from freeze-drying process from starting, to terminating to only have a refrigerant loop, need not refrigerant loop be switched, ensure the reliable and stable of the operating condition of compressor.
The technological means that the present invention adopts is as follows:
A kind of double heat exchange cooling cycle system, comprises 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 characterized in that:
The outlet of described plate heat exchanger is connected with condenser cooling coil entrance by pipeline, and described condenser cooling coil exports to be connected with described partial circulating pipeline circulating pump, described check valve by pipeline gets back to described plate heat exchanger entrance by pipeline again;
Described condenser cooling coil outlet is also connected with described systemic circulation pipeline circulating pump, described heater by pipeline and enters front case shelf header inlet by pipeline again, and described front case shelf manifold outlet ports is connected back to described plate heat exchanger entrance mutually by pipeline and described low temperature pneumatic ball valve I;
Export at the pipeline be connected with described front case shelf manifold outlet ports and described condenser cooling coil between the pipeline be connected with described systemic circulation pipeline circulating pump and be also provided with the pipeline be connected with described low temperature pneumatic ball valve II;
During pre-freeze in early stage, open described systemic circulation pipeline circulating pump and described low temperature pneumatic ball valve I and form front case shelf and condenser cooling coil systemic circulation passage integrally;
During primary drying, close described low temperature pneumatic ball valve I, open two partial circulating passages that described partial circulating pipeline circulating pump and described low temperature pneumatic ball valve II form described front case shelf and each self-loopa of described condenser cooling coil.
Further, during pre-freeze in early stage, condenser is entered by described plate type heat exchanger outlet through condenser cooling coil entrance through the cooled silicone oil of described plate type heat exchanger, after the outlet of condenser cooling coil enters described heater after described systemic circulation pipeline circulating pump, enter front case shelf header inlet more again, then get back to described plate heat exchanger entrance by front case shelf manifold outlet ports through described low temperature pneumatic ball valve I and complete cooling to front case shelf.
Further, during primary drying, two partial circulating passages are respectively:
One is described front case shelf heat cycles passage, and described front case shelf manifold outlet ports enters described low temperature pneumatic ball valve II, described systemic circulation pipeline circulating pump, described heater are got back to described front case shelf header inlet and completed heating to described front case shelf;
One is condenser cooling coil cool cycles passage, silicone oil enters described condenser cooling coil entrance through the outlet of described plate heat exchanger and enters condenser, then after described partial circulating pipeline circulating pump, described check valve, gets back to described plate heat exchanger entrance from the outlet of condenser cooling coil and complete cooling to described condenser cooling coil.
In this stage, according to freeze-dry process requirement, refrigeration system gives condenser cooling coil refrigeration always, and the switching of this refrigeration object has been come by double heat-exchange system.Realizing not by the method for work switching refrigerant loop, making compressor from freeze-drying process from starting to only have a refrigerant loop to end.Need not refrigerant loop be switched, ensure the reliable and stable of the operating condition of compressor.
As in freeze-drying process, prominent chance has a power failure, of short duration vacuum can be carried out by the cooling silicone oil in condenser coil and maintain, make system vacuum not have too large fluctuation.
Further, the described circulatory system by motor and Valve controlling circulation unlatching and stopping, when described front case shelf is cooled to preset temperature, switch to partial circulating to freeze.
Double heat exchange circulation system is made to form great circulation system by the switching of motor, valve when freeze-drying system brings into operation, cold-producing medium cools front case shelf by carrying out heat exchange in plate heat exchanger and silicone oil, treat that shelf temperature reaches setting value, system is become partial circulating by motor, valve transfer, to condenser cooling coil refrigeration, beat limiting temperature.When current box shelf temperature departs from setting value, by carrying out the temperature of regulable control shelf to the switch control rule of low temperature pneumatic ball valve I, make shelf temperature stable operation in controlling value.
Comparatively prior art is compared, and in the present invention, after silicone oil carries out heat exchange, is coordinated allow heat transmission medium silicone oil come to case shelf cooling before vacuum freeze drier or to the cooling of condenser cooling coil by the switch of the pipeline of the circulatory system and each motor, valve.The accurate control of shelf temperature and condenser temperature is realized by each motor of the circulatory system, cooperatively interacting of valve.
The present invention has the following advantages:
1) ensure that refrigeration system refrigerant loop is single loop in whole freeze-dry process process, do not need to switch refrigerant loop.
2) load change sharply can be adapted to; During the system failure, vacuum hold facility increases.
3) during low temperature running, enough can carry out supplementary load by conduction oil, ensure compressor stable operation.
4) condensing surface effectively maintaining condenser amasss.
5) temperature of condenser can be controlled, and can realize the engineering that defrosts by heating silicone oil.
6) shelf temperature easily controls, and the temperature homogeneity of flaggy is improved.
The double heat exchange cooling cycle system of the present invention can directly apply to vacuum freeze drier for the foregoing reasons, the uniformity of case shelf and condenser cooling coil temperature before in raising equipment, and then improving the main performance of machine, the present invention also can be applicable to the device for cold and exchange heat in other equipment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is schematic flow sheet of the present invention.
In figure: 1, plate heat exchanger 11, plate heat exchanger entrance 12, plate heat exchanger outlet 13, refrigerant exit 14, compressor return air mouth 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, front case shelf header inlet 82, front case shelf manifold outlet ports 91, condenser cooling coil entrance 92, the outlet of condenser cooling coil.
Detailed description of the invention
As shown in Figure 1, a kind of double heat exchange cooling cycle system, comprise plate heat exchanger 1, systemic circulation pipeline circulating pump 2, 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, described plate heat exchanger outlet 12 is connected with condenser cooling coil entrance 91 by pipeline, described condenser cooling coil outlet 92 is by pipeline and described partial circulating pipeline circulating pump 4, described check valve 7 is connected and gets back to described plate heat exchanger entrance 11 by pipeline again, plate heat exchanger 1 is also provided with refrigerant exit 13 and compressor return air mouth 14 simultaneously.
Described condenser cooling coil outlet 92 is also connected with described systemic circulation pipeline circulating pump 2, described heater 6 by pipeline and enters front case shelf header inlet 81 by pipeline again, and described front case shelf manifold outlet ports 82 is connected back to described plate heat exchanger entrance 11 mutually by pipeline and described low temperature pneumatic ball valve I 3;
Export between 92 pipelines be connected with described systemic circulation pipeline circulating pump 2 at the pipeline be connected with described front case shelf manifold outlet ports 82 and described condenser cooling coil and be also provided with the pipeline be connected with described low temperature pneumatic ball valve II 5;
During pre-freeze in early stage, open the systemic circulation passage of described systemic circulation pipeline circulating pump 2 and the front case shelf of described low temperature pneumatic ball valve I 3 formation and condenser cooling coil one; Namely export 12 through the cooled silicone oil of described plate type heat exchanger 1 by described plate type heat exchanger and enter condenser through condenser cooling coil entrance 91, after condenser cooling coil outlet 92 enters described heater 6 after described systemic circulation pipeline circulating pump 2, enter front case shelf header inlet 81 more again, then get back to described plate heat exchanger entrance 11 by front case shelf manifold outlet ports 82 through described low temperature pneumatic ball valve I 3 and complete cooling to front case shelf.
During primary drying, close described low temperature pneumatic ball valve I 3, open two partial circulating passages of described partial circulating pipeline circulating pump 4 and the described low temperature pneumatic ball valve II 5 described front case shelf of formation and each self-loopa of described condenser cooling coil, be respectively:
One is described front case shelf heat cycles passage, and described front case shelf manifold outlet ports 82 enters described low temperature pneumatic ball valve II 5, described systemic circulation pipeline circulating pump 2, described heater 6 are got back to described front case shelf header inlet 81 and completed heating to described front case shelf;
One is condenser cooling coil cool cycles passage, cooled silicone oil enters described condenser cooling coil entrance 91 through described plate heat exchanger outlet 12 and enters condenser, then after described partial circulating pipeline circulating pump 4, described check valve 7, gets back to described plate heat exchanger entrance 11 from condenser cooling coil outlet 92 and complete cooling to described condenser cooling coil.
In this stage, according to freeze-dry process requirement, refrigeration system gives condenser cooling coil refrigeration always, and the switching of this refrigeration object has been come by double heat-exchange system.Realizing not by the method for work switching refrigerant loop, making compressor from freeze-drying process from starting to only have a refrigerant loop to end.Need not refrigerant loop be switched, ensure the reliable and stable of the operating condition of compressor.
As in freeze-drying process, prominent chance has a power failure, of short duration vacuum can be carried out by the cooling silicone oil in condenser coil and maintain, make system vacuum not have too large fluctuation.
Further, the described circulatory system by motor and Valve controlling circulation unlatching and stopping, when described front case shelf is cooled to preset temperature, switch to partial circulating to freeze.
Double heat exchange circulation system is made to form great circulation system by the switching of motor, valve when freeze-drying system brings into operation, cold-producing medium cools front case shelf by carrying out heat exchange in plate heat exchanger 1 and silicone oil, treat that shelf temperature reaches setting value, system is become partial circulating by motor, valve transfer, to condenser cooling coil refrigeration, beat limiting temperature.When current box shelf temperature departs from setting value, by carrying out the temperature of regulable control shelf to the switch control rule of low temperature pneumatic ball valve I 3, make shelf temperature stable operation in controlling value.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a double heat exchange cooling cycle system, comprises 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 characterized in that:
The outlet of described plate heat exchanger is connected with condenser cooling coil entrance by pipeline, and described condenser cooling coil exports to be connected with described partial circulating pipeline circulating pump, described check valve by pipeline gets back to described plate heat exchanger entrance by pipeline again;
Described condenser cooling coil outlet is also connected with described systemic circulation pipeline circulating pump, described heater by pipeline and enters front case shelf header inlet by pipeline again, and described front case shelf manifold outlet ports is connected back to described plate heat exchanger entrance mutually by pipeline and described low temperature pneumatic ball valve I;
Export at the pipeline be connected with described front case shelf manifold outlet ports and described condenser cooling coil between the pipeline be connected with described systemic circulation pipeline circulating pump and be also provided with the pipeline be connected with described low temperature pneumatic ball valve II;
During pre-freeze in early stage, open described systemic circulation pipeline circulating pump and described low temperature pneumatic ball valve I and form front case shelf and condenser cooling coil systemic circulation passage integrally;
During primary drying, close described low temperature pneumatic ball valve I, open two partial circulating passages that described partial circulating pipeline circulating pump and described low temperature pneumatic ball valve II form described front case shelf and each self-loopa of described condenser cooling coil.
2. double heat exchange cooling cycle system according to claim 1, it is characterized in that: during pre-freeze in early stage, condenser is entered by described plate type heat exchanger outlet through condenser cooling coil entrance through the cooled silicone oil of described plate type heat exchanger, after the outlet of condenser cooling coil enters described heater after described systemic circulation pipeline circulating pump, enter front case shelf header inlet more again, then get back to described plate heat exchanger entrance by front case shelf manifold outlet ports through described low temperature pneumatic ball valve I and complete cooling to front case shelf.
3. double heat exchange cooling cycle system according to claim 1, is characterized in that: during primary drying, and two partial circulating passages are respectively:
One is described front case shelf heat cycles passage, and described front case shelf manifold outlet ports enters described low temperature pneumatic ball valve II, described systemic circulation pipeline circulating pump, described heater are got back to described front case shelf header inlet and completed heating to described front case shelf;
One is condenser cooling coil cool cycles passage, silicone oil enters described condenser cooling coil entrance through the outlet of described plate heat exchanger and enters condenser, then after described partial circulating pipeline circulating pump, described check valve, gets back to described plate heat exchanger entrance from the outlet of condenser cooling coil and complete cooling to described condenser cooling coil.
4. double heat exchange cooling cycle system according to claim 1, is characterized in that: the described circulatory system by motor and Valve controlling circulation unlatching and stopping, when described front 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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609032.6A CN105222422B (en) | 2015-09-22 | 2015-09-22 | Double heat exchange cooling cycle system |
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| CN105222422A true CN105222422A (en) | 2016-01-06 |
| CN105222422B CN105222422B (en) | 2017-12-29 |
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| CN201510609032.6A Expired - Fee Related CN105222422B (en) | 2015-09-22 | 2015-09-22 | Double heat exchange cooling cycle system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106036833A (en) * | 2016-05-30 | 2016-10-26 | 江苏哈工药机科技股份有限公司 | Material circulating system and circulating method for production of colla corii asini cakes |
| CN110081675A (en) * | 2018-01-25 | 2019-08-02 | 郑州大学 | A kind of novel freezing drying machine cold-hot integrated system |
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| 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 |
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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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106036833A (en) * | 2016-05-30 | 2016-10-26 | 江苏哈工药机科技股份有限公司 | Material circulating system and circulating method for production of colla corii asini cakes |
| 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 |
| CN110081675A (en) * | 2018-01-25 | 2019-08-02 | 郑州大学 | A kind of novel freezing drying machine cold-hot integrated system |
| CN110081675B (en) * | 2018-01-25 | 2023-11-24 | 郑州大学 | Novel cold and hot integrated system of freeze dryer |
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| CN105222422B (en) | 2017-12-29 |
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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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