CN108168221B - Vacuum freeze drying device and method for vacuum freeze drying material - Google Patents
Vacuum freeze drying device and method for vacuum freeze drying material Download PDFInfo
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- CN108168221B CN108168221B CN201810102474.5A CN201810102474A CN108168221B CN 108168221 B CN108168221 B CN 108168221B CN 201810102474 A CN201810102474 A CN 201810102474A CN 108168221 B CN108168221 B CN 108168221B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to the technical field of vacuum freeze drying, in particular to a vacuum freeze drying device and a method for vacuum freeze drying materials by using the vacuum freeze drying device. The vacuum freeze drying device comprises a vacuum box, wherein a partition plate support, a refrigerant inlet header pipe, a refrigerant outlet header pipe, a heat medium inlet header pipe, a heat medium outlet header pipe and at least one heat exchange layer are arranged in the vacuum box, each heat exchange layer comprises a single-layer heat medium coil pipe, a single-layer refrigerant coil pipe and a single-layer panel, the single-layer heat medium coil pipes and the single-layer refrigerant coil pipes are arranged side by side and are distributed in an S shape, and the single-layer heat medium coil pipes and the single-layer refrigerant coil pipes are attached and fixed on one side of the single-layer panel. The refrigerant and the heating medium in the invention are respectively self-propelled by different pipelines, so that a plurality of freezing and vacuum drying cabins can conveniently utilize common refrigerant and heating medium even in different process nodes, and simultaneously, when refrigeration and heating are switched, the refrigerant or the heating medium can be recycled to the total refrigerant storage tank or the heating medium storage tank through respective coils so as to save energy.
Description
Technical Field
The invention relates to the technical field of vacuum freeze drying, in particular to a vacuum freeze drying device. The invention also relates to a method for vacuum freeze drying materials by using the vacuum freeze drying device.
Background
Vacuum freeze-drying, also called sublimation drying, is to freeze the material to make the water contained in it become ice blocks, then sublimate the ice blocks under vacuum to achieve the drying purpose. Thus, it is known that the completion of vacuum freeze-drying requires that the temperature of the material be controlled at different time nodes in addition to a certain vacuum level.
Currently, the interior of a vacuum freeze drying oven usually adopts a single-loop coil structure, and only a single medium (such as silicone oil and heat conducting oil) can flow in the vacuum freeze drying oven, and the medium needs to be cooled or heated by a heat exchanger to control the temperature according to the process requirement, so that the following disadvantages usually occur in the medium and the subsequent operation.
The same medium needs repeated temperature change, so that the energy consumption is high, and the quality of the medium is reduced; the medium selectivity is very small, and silicone oil or heat conduction oil is often used, and the specific heat capacity of the medium is relatively small, and the medium is only 40% or less of water; the silicone oil or the heat conduction oil has small surface tension and is easy to leak from the machine; the silicone oil or the heat conduction oil has larger thermal expansion coefficient and is easy to generate overpressure problem; silicone oil or heat conduction oil is poor in lubricity and high in flow resistance; the silicone oil or the heat conducting oil has certain hygroscopicity, and after moisture absorption, the solidifying point is reduced; silicone oils or thermally conductive oils are relatively expensive.
Therefore, how to solve the above-mentioned problems caused by vacuum freezing materials using a single medium is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
A first object of the present invention is to provide a vacuum freeze-drying apparatus to solve the problems caused by vacuum freeze-drying of materials using a single medium.
A second object of the present invention is to provide a method for vacuum freeze-drying a material using the above vacuum freeze-drying apparatus.
In order to achieve the first object, the invention provides a vacuum freeze drying device, which comprises a vacuum box, wherein a partition plate bracket, a refrigerant inlet collecting pipe, a refrigerant outlet collecting pipe, a heat medium inlet collecting pipe, a heat medium outlet collecting pipe and at least one heat exchange layer are arranged in the vacuum box, the heat exchange layer comprises a single-layer heat medium coil, a single-layer refrigerant coil and a single-layer panel, the single-layer heat medium coil and the single-layer refrigerant coil are arranged side by side and are distributed in an S shape, the single-layer heat medium coil and the single-layer refrigerant coil are attached and fixed on one side of the single-layer panel, and the single-layer panel is fixed on the partition plate bracket; the heat medium inlet and the heat medium outlet of the single-layer heat medium coil are respectively communicated with the heat medium inlet header pipe and the heat medium outlet header pipe, and the refrigerant inlet and the refrigerant outlet of the single-layer refrigerant coil are respectively communicated with the refrigerant inlet header pipe and the refrigerant outlet header pipe.
Preferably, the heat medium inlet and the heat medium outlet of the single-layer heat medium coil are respectively communicated with the heat medium inlet header pipe and the heat medium outlet header pipe through bent pipes; the refrigerant inlet and the refrigerant outlet of the single-layer refrigerant coil are respectively communicated with the refrigerant inlet header pipe and the refrigerant outlet header pipe through bent pipes.
Preferably, the heat medium inlet of the single-layer heat medium coil and the refrigerant inlet of the single-layer refrigerant coil are lower than the single-layer panel in the vertical direction, and the heat medium outlet of the single-layer heat medium coil and the refrigerant outlet of the single-layer refrigerant coil are higher than the single-layer panel in the vertical direction.
Preferably, the heat medium inlet header pipe, the heat medium outlet header pipe, the refrigerant inlet header pipe and the refrigerant outlet header pipe are horizontally extended out of the vacuum box body through elbows.
Preferably, the inlet position of the heat medium inlet header pipe is lower than the outlet position of the heat medium outlet header pipe in the vertical direction, and the inlet position of the refrigerant inlet header pipe is lower than the outlet position of the refrigerant outlet header pipe in the vertical direction.
Preferably, the vacuum box comprises a vacuum box body and a vacuum door, and the vacuum box body and the vacuum door are connected through a double hinge structure.
Preferably, the vacuum box body is provided with a manhole and at least one vacuum air exhaust pipeline.
Preferably, the vacuum box body and the vacuum door all include the inner panel and strengthen the rectangular pipe, strengthen the rectangular pipe and fix on the inner panel, the vacuum box body with the outside of vacuum door all is covered with the heat preservation.
Preferably, the heating medium is hot water, and the cooling medium is calcium chloride brine.
In order to achieve the second object, the present invention provides a method for vacuum freeze-drying a material by using the vacuum freeze-drying device, comprising:
placing the material to be dried on the single-layer panel;
injecting a refrigerant into the single-layer refrigerant coil pipe through the refrigerant inlet header pipe, enabling the refrigerant to enter the refrigerant outlet header pipe through the single-layer refrigerant coil pipe, and reversely pumping the refrigerant in the single-layer refrigerant coil pipe after the temperature of the dried material reaches a preset freezing temperature;
vacuumizing the vacuum box to enable the vacuum degree in the vacuum box to reach a preset value;
injecting a heating medium into the single-layer heating medium coil pipe through a heating medium inlet header pipe, enabling the heating medium to enter a heating medium outlet header pipe through the single-layer heating medium coil pipe, and controlling the flow of the heating medium to enable the temperature of a material to be dried to change according to a preset temperature time change curve;
after the drying material is dried, reversely pumping out the heating medium in the single-layer heating medium coil;
injecting a refrigerant into the single-layer refrigerant coil pipe through the refrigerant inlet header pipe, enabling the refrigerant to enter the refrigerant outlet header pipe through the single-layer refrigerant coil pipe, and reversely pumping the refrigerant in the single-layer refrigerant coil pipe after the temperature of the dried material is cooled to a preset cooling temperature;
and (5) recovering the vacuum degree in the vacuum box to normal pressure, and taking out the dried material.
According to the vacuum freeze-drying device and the method for vacuum freeze-drying materials, provided by the invention, the scheme that the heat medium circulation loop and the refrigerant circulation loop are designed side by side is adopted, so that the vacuum freeze-drying device has the refrigerating and heating functions, the refrigerant and the heat medium are respectively subjected to heat exchange in different loops, the temperature of the refrigerant or the heat medium is not required to be changed, the selected space of the refrigerant and the heat medium is relatively large, and even though the plurality of vacuum freeze-drying devices are arranged in different process nodes, the common refrigerant and heat medium can be utilized; when the refrigerating or heating is switched, the refrigerant and the heating medium can be recycled into the refrigerant storage tank or the heating medium storage tank through various coils, so that the aim of saving energy is fulfilled.
Drawings
Fig. 1 is a schematic front perspective view of a vacuum freeze-drying apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view showing a rear perspective structure of the vacuum freeze-drying apparatus of FIG. 1;
FIG. 3 is a schematic view of the septum housing of FIG. 1;
FIG. 4 is a schematic view of the heat exchange layer of FIG. 1 connected to a heat medium inlet header, a heat medium outlet header, and a heat medium outlet header;
FIG. 5 is a schematic view of the structure of the single heat exchange layer of FIG. 1;
FIG. 6 is a schematic view of the distribution structure of the working states of a plurality of vacuum freeze-drying devices;
wherein, in fig. 1-6:
the vacuum box body 1, the vacuum door 2, the heat exchange layer 3, the vacuum air exhaust pipeline 4, the single-layer heat medium coil 5, the single-layer refrigerant coil 6, the single-layer panel 7, the heat medium inlet header pipe 8, the heat medium outlet header pipe 9, the refrigerant inlet header pipe 10, the refrigerant outlet header pipe 11, the partition plate bracket 12, the double-hinge structure 13, the manhole 14, the bent pipe 15 and the bent pipe 16;
vacuum freeze-drying apparatus 100, common heating machine 200, common refrigerator 300, common vacuum pump 400, common refrigerant line 500, common heat medium line 600, and common vacuum line 700.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1 to 5, fig. 1 is a schematic front perspective view of a vacuum freeze-drying apparatus according to an embodiment of the present invention; FIG. 2 is a schematic view showing a rear perspective structure of the vacuum freeze-drying apparatus of FIG. 1; FIG. 3 is a schematic view of the septum housing of FIG. 1; FIG. 4 is a schematic view of the heat exchange layer of FIG. 1 connected to a heat medium inlet header, a heat medium outlet header, and a heat medium outlet header; fig. 5 is a schematic view of the structure of the single heat exchange layer in fig. 1.
As shown in fig. 1 to 5, the vacuum freeze-drying device provided by the invention comprises a vacuum box, wherein the vacuum box can be square, cuboid or other shapes; the vacuum box is internally provided with a baffle plate bracket 12, a refrigerant inlet header pipe 10, a refrigerant outlet header pipe 11, a heat medium inlet header pipe 8, a heat medium outlet header pipe 9 and at least one layer of heat exchange layer 3.
The heat exchange layer 3 comprises a single-layer heat medium coil 5, a single-layer refrigerant coil 6 and a single-layer panel 7, wherein the single-layer heat medium coil 5 and the single-layer refrigerant coil 6 are arranged side by side and are distributed in an S shape, the single-layer heat medium coil 5 and the single-layer refrigerant coil 6 are attached and fixed on one side of the single-layer panel 7, and the single-layer panel 7 is fixed on the baffle bracket 12; the heat medium inlet and the heat medium outlet of the single-layer heat medium coil 5 are respectively communicated with the heat medium inlet header pipe 8 and the heat medium outlet header pipe 9, and the refrigerant inlet and the refrigerant outlet of the single-layer refrigerant coil 6 are respectively communicated with the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11.
The single-layer heat medium coil 5, the heat medium inlet header pipe 8 and the heat medium outlet header pipe 9 form a heat medium circulation loop, and the single-layer refrigerant coil 6, the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11 form a refrigerant circulation loop.
In a specific embodiment, a plurality of heat exchange layers 3 may be disposed on the separator support 12, and the plurality of heat exchange layers 3 may be disposed side by side up and down.
According to the vacuum freeze-drying device and the method for vacuum freeze-drying materials, provided by the invention, the scheme that the heat medium circulation loop and the refrigerant circulation loop are designed side by side is adopted, so that the vacuum freeze-drying device has the refrigerating and heating functions, the refrigerant and the heat medium are respectively subjected to heat exchange in different loops, the temperature of the refrigerant or the heat medium is not required to be changed, the selected space of the refrigerant and the heat medium is relatively large, and even though the plurality of vacuum freeze-drying devices are arranged in different process nodes, the common refrigerant and heat medium can be utilized; when the refrigerating or heating is switched, the refrigerant and the heating medium can be recycled into the refrigerant storage tank or the heating medium storage tank through various coils, so that the aim of saving energy is fulfilled.
In the specific scheme, the single-layer heat medium coil 5 and the single-layer refrigerant coil 6 are bent into an S shape after being side by side, so that adjacent single-layer heat medium coil 5 and single-layer refrigerant coil 6 are tightly and uniformly arranged and then welded with the single-layer panel 7 into a whole, small holes are reserved in the heat medium inlet header pipe 8, the heat medium outlet header pipe 9, the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11 and are used for communicating the single-layer heat medium coil 5 and the single-layer refrigerant coil 6, and the single-layer heat medium coil 5 and the single-layer refrigerant coil 6 can be welded with the small holes reserved in the heat medium inlet header pipe 8, the heat medium outlet header pipe 9, the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11 in a welding mode.
In a preferred scheme, in order to reduce the resistance of the connection part of the single-layer heat medium coil 5, the heat medium inlet header pipe 8 and the heat medium outlet header pipe 9, the heat medium inlet and the heat medium outlet of the single-layer heat medium coil 5 are respectively communicated with the heat medium inlet header pipe 8 and the heat medium outlet header pipe 9 through bent pipes 15.
In a preferred solution, in order to reduce the resistance of the refrigerant flowing through the connection parts of the single-layer refrigerant coil 6, the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11, the refrigerant inlet and the refrigerant outlet of the single-layer refrigerant coil 6 are respectively communicated with the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11 through bent pipes 15.
In the preferred scheme, the heat medium inlet of the single-layer heat medium coil 5 and the refrigerant inlet of the single-layer refrigerant coil 6 are lower than the single-layer panel 7 in the vertical direction, the heat medium outlet of the single-layer heat medium coil 5 and the refrigerant outlet of the single-layer refrigerant coil 6 are higher than the single-layer panel 7 in the vertical direction, and the refrigerant or the heat medium can be fully contacted with the single-layer refrigerant coil 6 or the single-layer heat medium coil 5, so that the heat exchange efficiency of the refrigerant or the heat medium and the single-layer refrigerant coil 6 or the single-layer heat medium coil 5 can be improved.
In a preferred embodiment, the heat medium inlet header pipe 8, the heat medium outlet header pipe 9, the refrigerant inlet header pipe 10 and the refrigerant outlet header pipe 11 all extend horizontally to the outside of the vacuum box body 1 through the elbow 16.
In a preferred embodiment, each single-layer panel 7 and the separator bracket 12 may be integrally welded to each other in order to reduce the stress deformation of the single-layer refrigerant coil 6 or the single-layer heat medium coil 5 and to maintain a relatively fixed position.
For ease of maintenance, the bulkhead holder 12 may be moved out of the vacuum box by tools together with each heat exchange layer 3.
In a preferred scheme, the inlet position of the heat medium inlet header pipe 8 is lower than the outlet position of the heat medium outlet header pipe 9 in the vertical direction, and the inlet position of the refrigerant inlet header pipe 10 is lower than the outlet position of the refrigerant outlet header pipe 11 in the vertical direction, so as to improve the heat exchange efficiency of the refrigerant and the heat medium.
In the preferred scheme, the vacuum box includes vacuum box 1 and vacuum door 2, vacuum box 1 with vacuum door 2 passes through double hinge structure 13 and is connected, can realize opening and closing of vacuum door 2, can also guarantee the leakproofness between vacuum door 2 and the vacuum box 1.
In a preferred scheme, at least one vacuum pumping pipeline 4 is arranged on the vacuum box body 1. The vacuum suction pipe 4 may be connected to a vacuum pump through a vacuum pipe, and the vacuum pump discharges air in the vacuum box 1.
As shown in fig. 2, a vacuum air suction pipe 4 is disposed at three positions of the upper, middle and lower positions of the rear end of the vacuum box 1, so as to rapidly discharge air at each position of the upper, middle and lower positions in the vacuum box 1, and maintain a predetermined vacuum degree.
In a preferred embodiment, the vacuum box 1 is provided with a manhole 14. In a specific scheme, the manhole 14 can be arranged at the rear end of the vacuum box body 1, so that the equipment operation condition and the material state of the vacuum box body 1 can be conveniently observed and detected through the manhole 14.
In the preferred scheme, vacuum box 1 with vacuum door 2 all includes the inner panel and strengthens the rectangular pipe, strengthen the rectangular pipe and fix on the inner panel, vacuum box 1 with vacuum door 2's the outside all covers the heat preservation.
In a preferred scheme, the heating medium can be hot water, and the cooling medium can be calcium chloride brine. The hot water and the calcium chloride brine both belong to the media with low price and high specific heat capacity, so that the cost can be reduced, and the problem of overpressure is not easy to occur.
The invention also provides a method for vacuum freeze drying materials by using the vacuum freeze drying device, which comprises the following steps.
Placing the material to be dried on the single-layer panel 7, and closing the vacuum door 2;
injecting a refrigerant into the single-layer refrigerant coil 6 through the refrigerant inlet header pipe 10, enabling the refrigerant to enter the refrigerant outlet header pipe 11 through the single-layer refrigerant coil 6, and reversely pumping the refrigerant in the single-layer refrigerant coil 6 after the temperature of the dried material reaches a preset freezing temperature;
vacuumizing the vacuum box to enable the vacuum degree in the vacuum box to reach a preset value;
injecting a heating medium into the single-layer heating medium coil 5 through a heating medium inlet header pipe 8, enabling the heating medium to enter a heating medium outlet header pipe 9 through the single-layer heating medium coil 5, and controlling the flow of the heating medium so that the temperature of a material to be dried changes according to a preset temperature time change curve;
after the drying material is dried, reversely pumping out the heating medium in the single-layer heating medium coil 5;
injecting a refrigerant into the single-layer refrigerant coil 6 through the refrigerant inlet header pipe 10, enabling the refrigerant to enter the refrigerant outlet header pipe 11 through the single-layer refrigerant coil 6, and reversely pumping the refrigerant in the single-layer refrigerant coil 6 after the temperature of the dried material is cooled to a preset cooling temperature;
and (5) recovering the vacuum degree in the vacuum box to normal pressure, and taking out the dried material.
In a specific embodiment, as shown in fig. 6, a plurality of vacuum cooling and drying apparatuses 100 are used to perform vacuum cooling and drying on the same or different materials, a common refrigerator 300 and a common heater 200 are used to supply a refrigerant and a heating medium respectively, the refrigerant and the heating medium are supplied to each vacuum cooling and drying apparatus 100 through a common refrigerant pipe 500 and a common heating medium pipe 600, and a common vacuum pump 400 is used to communicate each vacuum box through the common vacuum pipe 600, so as to perform vacuum pumping treatment on each vacuum box.
Each vacuum cooling and drying device can adopt different processes or be positioned at different process nodes, but common refrigerant and heating medium can be utilized, and each vacuum cooling and drying device does not need to be independently refrigerated or heated, so that the cost is reduced.
The refrigerant and the heating medium in the invention are respectively self-propelled by different pipelines, so that a plurality of freezing and vacuum drying cabins can conveniently utilize common refrigerant and heating medium even in different process nodes, and simultaneously, when refrigeration and heating are switched, the refrigerant or the heating medium can be recycled to the total refrigerant storage tank or the heating medium storage tank through respective coils so as to save energy.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. The vacuum freeze drying device is characterized by comprising a vacuum box, wherein a partition plate bracket, a refrigerant inlet header pipe, a refrigerant outlet header pipe, a heat medium inlet header pipe, a heat medium outlet header pipe and at least one heat exchange layer are arranged in the vacuum box, each heat exchange layer comprises a single-layer heat medium coil pipe, a single-layer refrigerant coil pipe and a single-layer panel, the single-layer heat medium coil pipes and the single-layer refrigerant coil pipes are arranged side by side and are distributed in an S shape, the single-layer heat medium coil pipes and the single-layer refrigerant coil pipes are attached and fixed on one side of the single-layer panel, and the single-layer panel is fixed on the partition plate bracket; the heat medium inlet and the heat medium outlet of the single-layer heat medium coil are respectively communicated with the heat medium inlet header pipe and the heat medium outlet header pipe, and the refrigerant inlet and the refrigerant outlet of the single-layer refrigerant coil are respectively communicated with the refrigerant inlet header pipe and the refrigerant outlet header pipe;
the heat medium inlet and the heat medium outlet of the single-layer heat medium coil are respectively communicated with the heat medium inlet header pipe and the heat medium outlet header pipe through bent pipes; the refrigerant inlet and the refrigerant outlet of the single-layer refrigerant coil are respectively communicated with the refrigerant inlet header pipe and the refrigerant outlet header pipe through bent pipes;
the heating medium is hot water, and the cooling medium is calcium chloride brine;
the inlet position of the heat medium inlet header pipe is lower than the outlet position of the heat medium outlet header pipe in the vertical direction, and the inlet position of the refrigerant inlet header pipe is lower than the outlet position of the refrigerant outlet header pipe in the vertical direction.
2. The vacuum freeze drying device according to claim 1, wherein the heat medium inlet of the single-layer heat medium coil and the refrigerant inlet of the single-layer refrigerant coil are vertically lower than the single-layer panel, and the heat medium outlet of the single-layer heat medium coil and the refrigerant outlet of the single-layer refrigerant coil are vertically higher than the single-layer panel.
3. The vacuum freeze drying apparatus of claim 1, wherein the heat medium inlet header pipe, the heat medium outlet header pipe, the refrigerant inlet header pipe, and the refrigerant outlet header pipe all extend horizontally out of the vacuum box through bends.
4. The vacuum freeze-drying apparatus according to claim 1, wherein the vacuum box comprises a vacuum box and a vacuum door, the vacuum box and the vacuum door being connected by a double hinge structure.
5. The vacuum freeze-drying apparatus according to claim 4, wherein a manhole and not less than one vacuum suction pipe are provided on the vacuum box.
6. The vacuum freeze-drying apparatus according to claim 4, wherein the vacuum box and the vacuum door each comprise an inner plate and a reinforcing rectangular tube fixed on the inner plate, and the outer sides of the vacuum box and the vacuum door are each covered with a heat insulating layer.
7. A method of vacuum freeze-drying a material using the vacuum freeze-drying apparatus of any one of claims 1-6, comprising:
placing the material to be dried on the single-layer panel;
injecting a refrigerant into the single-layer refrigerant coil pipe through the refrigerant inlet header pipe, enabling the refrigerant to enter the refrigerant outlet header pipe through the single-layer refrigerant coil pipe, and reversely pumping the refrigerant in the single-layer refrigerant coil pipe after the temperature of the dried material reaches a preset freezing temperature;
vacuumizing the vacuum box to enable the vacuum degree in the vacuum box to reach a preset value;
injecting a heating medium into the single-layer heating medium coil pipe through a heating medium inlet header pipe, enabling the heating medium to enter a heating medium outlet header pipe through the single-layer heating medium coil pipe, and controlling the flow of the heating medium to enable the temperature of a material to be dried to change according to a preset temperature time change curve;
after the drying material is dried, reversely pumping out the heating medium in the single-layer heating medium coil;
injecting a refrigerant into the single-layer refrigerant coil pipe through the refrigerant inlet header pipe, enabling the refrigerant to enter the refrigerant outlet header pipe through the single-layer refrigerant coil pipe, and reversely pumping the refrigerant in the single-layer refrigerant coil pipe after the temperature of the dried material is cooled to a preset cooling temperature;
and (5) recovering the vacuum degree in the vacuum box to normal pressure, and taking out the dried material.
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| CN201810102474.5A CN108168221B (en) | 2018-02-01 | 2018-02-01 | Vacuum freeze drying device and method for vacuum freeze drying material |
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| CN201810102474.5A CN108168221B (en) | 2018-02-01 | 2018-02-01 | Vacuum freeze drying device and method for vacuum freeze drying material |
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| CN108168221B true CN108168221B (en) | 2023-05-30 |
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| CN110530755B (en) * | 2019-09-09 | 2021-06-08 | 江苏省原子医学研究所 | Method for testing vacuum freeze drying time of photosensitive medicine and application |
| CN110953845A (en) * | 2019-12-20 | 2020-04-03 | 烟台睿加节能科技有限公司 | LNG vacuum freeze drying system and using method |
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| CN2315507Y (en) * | 1997-12-08 | 1999-04-21 | 常州健达干燥设备有限公司 | Refrigerating vacuum drying machine |
| CN1687679A (en) * | 2005-04-01 | 2005-10-26 | 南通冷冻设备有限公司 | Vacuum freeze drying device |
| FR2911672A1 (en) * | 2007-01-24 | 2008-07-25 | Usifroid | Refrigeration system for freeze-drying assembly, has low temperature refrigeration loop serving as heat source for very low temperature refrigeration loop to refrigerate tank or trap such that loops are mounted in cascade |
| EP2074367A2 (en) * | 2006-09-08 | 2009-07-01 | Praxair Technology, Inc. | Cryogenic refrigeration system for lyophilization |
| CN204574705U (en) * | 2015-04-14 | 2015-08-19 | 江苏博莱客冷冻科技发展有限公司 | The dual radiant panel of vacuum freeze drying |
| CN105318666A (en) * | 2015-11-17 | 2016-02-10 | 上海东富龙科技股份有限公司 | Vacuum spray freeze-drying device and method |
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2018
- 2018-02-01 CN CN201810102474.5A patent/CN108168221B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2315507Y (en) * | 1997-12-08 | 1999-04-21 | 常州健达干燥设备有限公司 | Refrigerating vacuum drying machine |
| CN1687679A (en) * | 2005-04-01 | 2005-10-26 | 南通冷冻设备有限公司 | Vacuum freeze drying device |
| EP2074367A2 (en) * | 2006-09-08 | 2009-07-01 | Praxair Technology, Inc. | Cryogenic refrigeration system for lyophilization |
| FR2911672A1 (en) * | 2007-01-24 | 2008-07-25 | Usifroid | Refrigeration system for freeze-drying assembly, has low temperature refrigeration loop serving as heat source for very low temperature refrigeration loop to refrigerate tank or trap such that loops are mounted in cascade |
| CN204574705U (en) * | 2015-04-14 | 2015-08-19 | 江苏博莱客冷冻科技发展有限公司 | The dual radiant panel of vacuum freeze drying |
| CN105318666A (en) * | 2015-11-17 | 2016-02-10 | 上海东富龙科技股份有限公司 | Vacuum spray freeze-drying device and method |
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