CN104964521A - Modularization continuous microwave freeze-drying cavity and microwave freeze-drying device including the same - Google Patents
Modularization continuous microwave freeze-drying cavity and microwave freeze-drying device including the same Download PDFInfo
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- CN104964521A CN104964521A CN201510423352.2A CN201510423352A CN104964521A CN 104964521 A CN104964521 A CN 104964521A CN 201510423352 A CN201510423352 A CN 201510423352A CN 104964521 A CN104964521 A CN 104964521A
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Abstract
The invention relates to a modularization continuous microwave freeze-drying cavity which comprises a chamber body and a shielding plate. A boss part is arranged in the middle of the shielding plate, and body sealing ring grooves are formed in the four sides of the boss part. A shielding plate installation channel is formed in the middle of the bottom face of the chamber body. Grooves are formed in the two ends of the outer surface of the chamber body in the length direction of the chamber body, and positioning pin assembling holes are formed in the grooves. Adjacent sealing ring grooves are formed in the part, around the hollow structure, of one side end face of the chamber body. By means of the modularization continuous microwave freeze-drying cavity, the temperature change deformation difference caused by inconformity of coefficients of linear expansion between a freeze-drying bin made of nonmetal wave-transmitting materials and the microwave shielding plate made of metal materials is effectively overcome, and the vacuum sealing performance is ensured; a metal connecting piece between a chamber body and a shielding plate in the conventional technology is removed, and the microwave loading uniformity in the freeze-drying process is ensured; assembling is achieved through modularization design, and the requirements for increasing the yield and expanding production are effectively met.
Description
[technical field]
The present invention relates to microwave freeze-dry equipment, particularly a kind of modularization continuous microwave freeze-drying chamber being applied to continuous microwave freeze-drier, and the continuous microwave freeze-drier containing described freeze-drying chamber.
[background technology]
Microwave freeze-dry is in conjunction with carry out microwave radiation heating technology and vacuum freeze drying technology, by improving the presentation mode of latent heat of sublimation in conventional freeze-drying process, adopt microwave to the heating of drying medium entirety, under microwave field effect, make the polar molecule in material that vibrations and phase mutual friction occur, thus be the latent heat of sublimation in material needed for water sublimed by electric energy conversion, realize dry materials.Relative to traditional freeze-drying mode, microwave freeze-dry has the significant advantage that rate of drying is fast, the thermal efficiency is high, operating cost is low.
Such as Chinese invention patent application CN102200378A discloses a kind of microwave vacuum freeze-drying device, wherein, vacuum storehouse for placing operation material is arranged in microwave cavity, vacuum storehouse comprises overall cylindrical nonmetal cover and metal warehouse, is separated between nonmetal cover and metal warehouse by shield plate of microwave.This equipment effectively achieves microwave freeze-dry, but the freeze-drying operation of its structures shape can only successively be carried out, and carry out vacuum freeze-drying-return to normal pressure to obtain product after namely dropping into material-decompression in vacuum storehouse, operating efficiency is low.
In order to realize continuous microwave freeze-drying, Chinese invention patent application CN102226635A discloses a kind of microwave continuous freeze-drying device, adopt the dry storehouse with length, material conveyer belt is provided with in dry storehouse, and continuous feed system and continuous discharge system are set respectively in the upstream and downstream of dry storehouse, realize working continuously of microwave freeze-dry.
Although do not limit the length of its dry storehouse in CN102226635A, but be limited to industry and manufacture and assembling level, the length of its dry storehouse is generally 800-1200mm.This is that dry storehouse is all-in-one-piece due to vacuum (or low pressure) job requirements in order to meet dry storehouse, splices to avoid bulkhead the seal defect brought.This monoblock type requires the length restriction determining dry storehouse, has also limited to the development of continuous-type microwave freeze-drying operation.
In order to realize the longer dry storehouse of length, a kind of imagination adopts modularized design, by connecting many group dry storehouses to increase entire length.But, the difficulty realizing modular microwave freeze-dry storehouse is on the one hand, its operation cavity is combined by electromagnetic wave transparent material cavity and non-electromagnetic wave transparent material barricade and forms, the difference of linear expansion that electromagnetic wave transparent material be can not ignore as metal has as glass, pottery or polytetrafluoroethylene (PTFE) (PVDF) and non-thin material, this species diversity causes bi-material in microwave freeze-dry process during variations in temperature, the contact position of bi-material can produce splicing gap, destroys vacuum environment, causes freeze-drying failure.
Be the mechanical connection of neighboring chambers on the other hand.In order to ensure neighboring chambers stable connection and avoid seam crossing to occur gap, a kind of imagination be the enough metal connecting piece such as bolt of working strength by bulkhead with shield plate of microwave, be connected between cavity with cavity, but metal bolts can cause the microwave field distribution in microwave continuous freeze-drying device uneven and affect effect, and replace the distortion adopting non-metallic material bolt cannot provide enough shear stress antagonism bi-materials.
[summary of the invention]
The object of the invention is, for prior art defect, to overcome the difference of linear expansion of different materials, provide a kind of there is good seal performance, the modularization continuous microwave freeze-drying chamber of splicing can be realized.
To achieve these goals, the invention provides a kind of modularization continuous microwave freeze-drying chamber, described freeze-drying chamber comprises the chamber body 1 be made up of electromagnetic wave transparent material and the barricade 2 be made up of non-electromagnetic wave transparent material, the length of chamber body 1 and the length of barricade 2 match, wherein, the boss portion 22 that barricade 2 comprises base portion 21 and is positioned in the middle part of base portion 21, four sides of described boss portion 22 are provided with body seal ring recess 23;
Chamber body 1 comprises antetheca adjacent successively, roof, rear wall and bottom surface, is hollow structure 16, is provided with the installation passage 14 matched with the boss portion 22 of barricade in the middle part of described bottom surface in the middle part of chamber body 1; The outer surface of chamber body 1 prolongs its length direction and is provided with groove 13 in the position near two ends, and the lateral wall of described groove 13 is provided with alignment pin pilot hole 15; The left side of chamber body 1 or right side are provided with contiguous seal ring recess 11 round hollow structure 16.
In the present invention, described freeze-drying chamber also comprises the sealing ring 3 be located at respectively in contiguous seal ring recess 11 and body seal ring recess 23.
In the present invention, described freeze-drying chamber also comprises the alignment pin 5 being located at the electromagnetic wave transparent material in alignment pin pilot hole 15 and making.
According to one preferred embodiment, the left and right sides of barricade base portion 21 has outer 24, and there is bolts assemblies hole 25 described outer 24.
Preferably, described freeze-drying chamber also comprises the bolt 6 being located at bolts assemblies hole 25.
According to there being one preferred embodiment, sealing ring 3 is gas-flow closure circle.
More preferably, described gas-flow closure circle is inner inert gas filled silica gel sealing ring.
Particularly preferably, the inner gas pressure of described gas-flow closure circle is 0.1 ~ 1.2MPa.
In the present invention, the length of described chamber body 1 is 800-3000mm.
The present invention also provides the microwave freeze-dry equipment containing one or more groups freeze-drying chamber described above.
Below will explain technical scheme of the present invention in more detail.
Modularization continuous microwave freeze-drying chamber of the present invention is the cavity arranging hollow structure 16 along its length, and comprise the chamber body 1 be made up of electromagnetic wave transparent material and the barricade 2 be made up of non-electromagnetic wave transparent material, they have the length of coupling.Usually, barricade 2 is positioned at bottom surface.
In the present invention, non-limiting for convenience of description, two ends along its length, freeze-drying chamber are defined as left and right, or title upstream and downstream, the direction at barricade 2 place is defined as the end or under, the direction relative with barricade 2 be defined as push up or on, all the other two sides are defined as front and rear.In the present invention, the two sides, front and back in freeze-drying chamber can be symmetrical, and left and right is also almost symmetry, without the need to strict differentiation.
As shown in Figure 3,4, the boss portion 22 that barricade 2 comprises base portion 21 and is positioned in the middle part of base portion 21, four sides of boss portion 22 have the body seal ring recess 23 of the indent of O type, built-in sealing ring 4.
As shown in Figure 1, 2, chamber body 1 is described as antetheca, roof, rear wall and bottom surface, they surround hollow structure 16.Wherein, have in the middle part of bottom surface and install passage 14, the boss portion 22 of its size and barricade matches, and guarantees that boss portion 22 can be coincide in installation passage 14.After coincideing, the body seal circle 3 in body seal ring recess 23 is extruded deformation, the air-tightness guaranteed boss portion 22 and install between passage 14.Be free assembly relation between barricade 2 and chamber body 1, not with bolts, avoid metal material loads uniformity in freeze-drying process impact on microwave, improve the stability of microwave continuous freeze-drying system.
Avoid using metal bolts in chamber body to realize effective location connection simultaneously, chamber body 1 is outside, be respectively equipped with annular groove 13 in the position near two ends, left and right, the lateral wall (i.e. the end face outer, left and right of chamber body 1) of groove 13 is provided with alignment pin pilot hole 15.Alignment pin pilot hole 15 inside is light face, after two groups of chamber body are adjacent by upstream and downstream direction, alignment pin 5 is inserted in alignment pin pilot hole 15, can by adjacent two groups of chamber body location, but and be not used in and be fixedly connected with, now chamber body can be moved along its length, and is limited to movement up and down or around.
Wherein one side in the left side of chamber body 1 or right side is provided with the contiguous seal ring recess 11 of matrix, and built-in contiguous seal circle 4, contiguous seal ring recess 11 is arranged round hollow structure 16.After two groups of chamber body are adjacent by upstream and downstream direction, the right side of upstream chamber main body connects with the left side of downstream chamber main body, and now contiguous seal circle 4 is by end face compressional deformation, guarantees the air-tightness of hollow structure 16 and chamber body 1 outside.
In addition, the left and right sides of barricade base portion 21 has outer 24, above has bolts assemblies hole 25.By bolt, upstream and downstream freeze-drying chamber is mechanically connected.
Connection aspect, modularization continuous microwave freeze-drying chamber of the present invention comprises: one is that two adjacent groups freeze-drying chamber adopts connecting bolt 6 to be fastenedly connected integral by barricade 2 (by outer 24 and bolts assemblies hole 25).Bolt 6 adopts metal material, guarantees to have enough intensity and shear stress, can be linked to be entirety by organizing modularization freeze-drying chamber more.It is outside that bolt 6 is in microwave freeze-dry storehouse, do not affect microwave field distribution.Two is the connections between adjacent chamber body 1, and owing to being in microwave field inside, the alignment pin 5 adopting electromagnetic wave transparent material to make positions, and associating contiguous seal circle 4 carries out vacuum seal.Owing to being freely assemble between chamber body 1 and barricade 2, therefore gap can be there is between chamber body 1 and barricade 2, the alignment pin 5 that nonmetal electromagnetic wave transparent material makes provides enough tensile stresses and positions adjacent dry storehouse, and contiguous seal circle 4 provides enough vacuum seal effects with gap length change.Modular like this design between module and the connection of continuous microwave freeze-drying cavity and front and back device both provide perfect support.
In the present invention, nonmetal electromagnetic wave transparent material such as quartz glass, pottery, polyethylene (PE), polypropylene (PP), polyethers ether copper (PEEK), polytetrafluoroethylene (PTFE) (PVDF) etc. all can be used for structure chamber body and alignment pin.
The metal material being usually used in manufacturing barricade is alloy, as 3A21 type aluminium alloy, SUS304 type stainless steel.
In the present invention, the sealing area of concern comprises between chamber body bottom surface and barricade boss portion, and between two adjacent dry storehouses.
Wherein, chamber body is made from barricade owing to adopting nonmetal electromagnetic wave transparent material and the saturating thin material of metal respectively and is had different linear expansion coefficients.Due to processing temperature change in freeze-drying process, cause due to the expansion rate difference of bi-material both contact surfaces to produce slot, thus destroy vacuum seal state.Sealing ring is adopted in order to address this problem.But existing solid elastomeric sealing ring can not be dealt with problems.This is due to the change along with slot, and the decrement of solid elastomeric sealing ring also changes thereupon, thus loses vacuum sealing ability, and then causes vacuum leak.
The chamber body made in order to ensure different materials and the barricade sealing in operation process, the present invention adopts gas-flow closure circle.The degrees of expansion of gas-flow closure circle is limited to two aspects: one is pressure in gas-flow closure circle, and two is seal groove sizes.In retainer plate under pressure condition, when causing seal groove size to change because degrees of expansion is inconsistent, gas-flow closure circle can expand the effect reaching sealed vacuum thereupon, and inner inflatable is not also by microwave loading effect, meets user demand.This mode of freely assembling, can the temperature that causes due to difference of linear expansion between the shield plate of microwave that makes of the chamber body made of metal electromagnetic wave transparent material and metal material by no means of efficient solution to become deflection different, thus guarantee the sealing property between hollow structure 16 and dry storehouse outside.
Therefore particularly preferably, the present invention adopts inner inert gas filled silica gel sealing ring, when the inner gas pressure of gas-flow closure circle is that 0.1 ~ 1.2MPa can more effectively meet seal request of the present invention.In the present invention, inert gas is interpreted as helium or nitrogen.
In the present invention, freeze-drying cavity length is 800-3000mm.It singly can organize use, also can be linked in sequence organizing freeze-drying chamber by bolt more, is configured to the freeze-drying chamber group more grown, to improve operating efficiency.
Therefore, modularization continuous microwave freeze-drying chamber of the present invention achieves following effect:
(1) effectively overcome by gas-flow closure circle the temperature change deflection caused because linear expansion coefficient is inconsistent between nonmetal the electromagnetic wave transparent material dry storehouse made and the shield plate of microwave that metal material makes different, guarantee vacuum seal performance;
(2) eliminate the metal connecting piece (as metal bolts) between routine techniques middle chamber main body and barricade, ensure that the microwave in freeze-drying process loads uniformity;
(3) adopting can modularization, the standardized designs of flexible Application, solves the difficulty of processing because material brings, precision problem; Realize longer cavity by the adjacent assembling in modularization freeze-drying chamber, meet the requirement of output increased and extension production;
(4) adopt storehouse formula structure, connect before and after being convenient to and assembling, solve vacuum seal problem.
[accompanying drawing explanation]
Fig. 1 is the main TV structure figure of chamber body;
Fig. 2 is chamber body left view;
Fig. 3 is the main TV structure figure of barricade;
Fig. 4 is barricade left view;
Fig. 5 is the main TV structure figure in continuous print three groups of freeze-drying chambeies of assembling;
Fig. 6 is the left TV structure figure of Fig. 5.
Wherein, 1, chamber body; 2, barricade; 3, body seal circle; 4, contiguous seal circle; 5, alignment pin; 6, bolt; 11, contiguous seal ring recess; 13, groove; 14, passage is installed; 15, alignment pin pilot hole; 16, hollow structure; 21, base portion; 22, boss portion; 23, body seal ring recess; 24, outer; 25, bolts assemblies hole.
[detailed description of the invention]
Following examples are used for explaining technical scheme of the present invention without limitation.Those skilled in the art can use for reference content of the present invention, the links such as suitable change structure, annexation, material, parameter, size, technique realize other object corresponding, its relevant change does not all depart from content of the present invention, all similar replacements and change will become apparent to those skilled in the art that and all should be deemed to be included within scope of the present invention.
Modularization continuous microwave freeze-drying chamber unit as shown in accompanying drawing 5,6, comprises chamber body 1 (as shown in Figure 1, 2) and barricade 2 (as shown in Figure 3,4).Barricade 2 is arranged on chamber body 1 bottom, guarantees the sealing between the boss portion 22 of barricade 2 and installation passage 14 internal face of chamber body 1 by body seal circle 3.Barricade 2 boss portion 22 has cold-trap intercommunicating pore (not shown in FIG.), for connecting cold-trap.
Adjacent freeze-drying chamber unit combination is linked together, by alignment pin 5, adjacent chamber body 1 is located, then by the bolt 6 be in outside microwave field, adjacent barricade 2 is mechanically connected.In addition, by external seal in the chamber in contiguous seal circle 4 realization sealing freeze-drying chamber between the binding face of adjacent chamber body 1.
Freeze-drying chamber by 10 freeze-drying chamber unit combination is arranged in continuous microwave freeze-drier disclosed in CN102226635A, continuous feed system and continuous discharge system is set respectively in freeze-drying chamber upstream and downstream, material conveyor belt is set therebetween.It is outside that microwave system is arranged on freeze-drying chamber, can to freeze-drying intracavitary irradiation microwave.Respectively microwave suppressor having is installed at the upstream and downstream two ends in freeze-drying chamber, guarantees that a microwave field survival is in freeze-drying chamber.Cold-trap intercommunicating pore in the shield plate of microwave of each freeze-drying chamber unit connects a small-sized cold-trap (being equivalent to vacuum water-trapping system) respectively, for extracting the steam produced in microwave freeze-dry process.
During operation, freeze-drying raw material is rendered on material conveyor belt by continuous feed system, and pass through in the continuous microwave vacuum cavity that 10 chamber body 1 connected continuously are formed, the loading effect by microwave is frozen drying.The steam generated is absorbed by cold-trap by cold-trap intercommunicating pore, guarantees that in cavity, steam is in low-level.In freeze-drying process, chamber body 1 and shield plate of microwave 2 are subject to the heat by conduction of freeze-dried material, and temperature changes and causes material deformation, and the sealing surface of material junction also changes thereupon.In addition, unit connection aspect, adjacent freeze-drying chamber, connect the alignment pin 5 adopting nonmetal electromagnetic wave transparent material to make between adjacent chamber body 1 to connect, because alignment pin 5 does not play the role of fastening, only play locating effect, so the gap between adjacent chamber body 1 can change with material deformation.
In order to solve sealing problem, investigate the impact of dissimilar sealing ring on the freeze-drying chamber that different materials is made:
Embodiment 1
Chamber body 1 adopts high density polyethylene (HDPE) (HDPE) to be made by Shooting Technique, and shield plate of microwave 2 adopts 3A21 aluminium alloy to be made by cutting technique.In freeze-drying operation process, be subject to freeze-drying raw material Heat Transfer Influence, the temperature of chamber body 1 and shield plate of microwave 2 is down to 10 DEG C, and initial temperature presses normal temperature 25 DEG C calculating, and the temperature difference is 15 DEG C.
In addition, the linear expansion coefficient of material is:
HDPE：180×10
-6/℃
3A21：23.2×10
-6/℃
Count according to the one direction length 1200mm in individual module microwave vacuum chamber, under the temperature difference of 15 DEG C, the gap length caused because bi-material linear expansion coefficient is inconsistent is:
(1200mm×15℃×180×10
-6/℃-1200mm×15℃×23.2×10
-6/℃)/2＝1.4mm
Adopt respectively be made up of rubber solid elastomeric sealing ring, fill silica gel sealing ring that pressure in nitrogen is 0.1mPA, fill silica gel sealing ring that pressure in nitrogen is 0.5mPA and fill in nitrogen and press the silica gel sealing ring of 1.2mPA as body seal circle and contiguous seal circle, relatively its sealing effectiveness, result is as follows:
Wherein, in chamber, vacuum is measured by vacuum meter.
Leak rate is measured by permanent vacuum condition according to " JB/T 10285-2001 food vacuum freeze drying equipment " standard, it shows that freeze-drying chamber is a vacuum tank that can strictly seal, in experimentation of the present invention, when thinking that gas leakage numerical value is greater than 25PaL/s, the seal in freeze-drying chamber does not meet microwave freeze-dry job requirements.
Experiment confirms, interior pressure is that the gas-flow closure circle of 0.1-1.2mPA all can realize effective sealing, and the material joints place changing about 1.4mm under the microwave environment of 15 DEG C of temperature difference, for gap can guarantee the seal of dry storehouse.Wherein, although the gas-flow closure circle of 0.1mPA can cause higher leak rate, but still far below the specification required in " JB/T 10285-2001 food vacuum freeze drying equipment ", meet the job requirements of continuous microwave freeze-drying.And solid sealing ring conventional in prior art can not play due sealing effectiveness through actual measurement proof under the microwave environment like this with the larger temperature difference.
The adjacent aspect of freeze-drying chamber unit, adopts metal bolts to guarantee the stable connection of adjacent shields plate, avoids interference freeze-drying chamber inner.Gap change during freeze-drying operation between adjacent chamber body 1 is filled by contiguous seal circle.Because metal bolts is in beyond microwave field, can not affect microwave field distribution, freeze-drying operation process is good.
Embodiment 2:
Main storehouse 1 adopts HDPE material, and shield plate of microwave 2 adopts SUS304 stainless steel.In freeze-drying operation process, the temperature of chamber body 1 and shield plate of microwave 2 is down to 5 DEG C, and initial temperature presses normal temperature 25 DEG C calculating, and the temperature difference is 20 DEG C.
The linear expansion coefficient of HDPE is: 180 × 10
-6/ DEG C
The linear expansion coefficient of SUS304 is: 17.2 × 10
-6/ DEG C
Calculate according to the longest one direction length 1500mm of individual module microwave vacuum cavity, under the temperature difference of 20 DEG C, the gap length caused because bi-material linear expansion coefficient is inconsistent is:
(1500mm×20℃×180×10
-6/℃-1500mm×20℃×17.2×10
-6/℃)/2＝2.44mm
Adopt respectively be made up of rubber solid elastomeric sealing ring, fill silica gel sealing ring that pressure in nitrogen is 0.1mPA, fill silica gel sealing ring that pressure in nitrogen is 0.5mPA and fill in nitrogen and press the silica gel sealing ring of 1.2mPA as body seal circle and contiguous seal circle, relatively its sealing effectiveness, result is as follows:
Visible, the longer freeze-drying chamber of length can be constructed by modularization continuous microwave freeze-drying chamber of the present invention, length can regulate as required, the industrial assembly difficulty of effective reduction, air-tightness in bin can be guaranteed, avoid adopting metal connecting piece to avoid interference microwave field, for continuous microwave freeze-drying operation provides feasibility simultaneously.
Embodiment 3:
Adopt the material identical with embodiment 2 and operating parameter, difference is the validity testing longer modularization microwave vacuum cavity, and single cavity length is 3000mm.Calculating gap length is:
(3000mm×20℃×180×10
-6/℃-3000mm×20℃×17.2×10
-6/℃)/2＝4.88mm
Obviously, because single cavity length increases, the gap that the difference due to linear expansion coefficient is brought has concurrently and enlarges markedly, and exacerbates cavity sealing difficulty.
The test silica gel sealing ring of interior pressure 1.2mPA of filling silica gel sealing ring that the interior pressure of He gas is 0.5mPA and filling He gas is on the impact of vacuum in cavity and leak rate in freeze-drying operation process respectively, and result is as follows:
Visible, gas-flow closure circle can meet the air-tightness requirement in the longer freeze-drying chamber of length.
Claims (10)
1. modularization continuous microwave freeze-drying chamber, described freeze-drying chamber comprises the chamber body (1) be made up of electromagnetic wave transparent material and the barricade (2) be made up of non-electromagnetic wave transparent material, the length of chamber body (1) and the length of barricade (2) match, it is characterized in that barricade (2) comprises base portion (21) and is positioned at the boss portion (22) at base portion (21) middle part, four sides of described boss portion (22) are provided with body seal ring recess (23);
Chamber body (1) comprises antetheca adjacent successively, roof, rear wall and bottom surface, chamber body (1) middle part is hollow structure (16), is provided with the installation passage (14) matched with the boss portion of barricade (22) in the middle part of described bottom surface; The outer surface of chamber body (1) prolongs its length direction and is provided with groove (13) in the position near two ends, and the lateral wall of described groove (13) is provided with alignment pin pilot hole (15); The left side of chamber body (1) or right side are provided with contiguous seal ring recess (11) round hollow structure (16).
2. freeze-drying chamber according to claim 1, is characterized in that described freeze-drying chamber also comprises the sealing ring (3) be located at respectively in contiguous seal ring recess (11) and body seal ring recess (23).
3. freeze-drying chamber according to claim 1, is characterized in that described freeze-drying chamber also comprises the alignment pin (5) being located at the electromagnetic wave transparent material in alignment pin pilot hole (15) and making.
4. freeze-drying chamber according to claim 1, is characterized in that the left and right sides of barricade base portion (21) has outer (24), described outer (24) has bolts assemblies hole (25).
5. freeze-drying chamber according to claim 4, is characterized in that described freeze-drying chamber also comprises the bolt (6) being located at bolts assemblies hole (25).
6. freeze-drying chamber according to claim 2, sealing ring (3) is gas-flow closure circle.
7. freeze-drying chamber according to claim 6, described gas-flow closure circle is inner inert gas filled silica gel sealing ring.
8. freeze-drying chamber according to claim 7, the inner gas pressure of described gas-flow closure circle is 0.1 ~ 1.2MPa.
9. freeze-drying chamber according to claim 1, is characterized in that the length of described chamber body (1) is 800-3000mm.
10. the microwave freeze-dry equipment containing one or more groups freeze-drying chamber any one of claim 1-9 as described in claim.
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| CN201510423352.2A CN104964521B (en) | 2015-07-17 | 2015-07-17 | Modularization continuous microwave freeze-drying cavity and microwave freeze-drying device including the same |
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|---|---|---|---|
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| WO2017011939A1 (en) * | 2015-07-17 | 2017-01-26 | 周川 | Modular continuous microwave freeze-drying chamber and microwave freeze-drying device comprising freeze-drying chamber |
| CN109579543A (en) * | 2017-09-28 | 2019-04-05 | 上海梅山钢铁股份有限公司 | A kind of stove gate device for cold rolled annealed experimental furnace |
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| Publication number | Publication date |
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| CN104964521B (en) | 2017-05-17 |
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