CN206905412U - Microwave vacuum freeze-drying device - Google Patents
Microwave vacuum freeze-drying device Download PDFInfo
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- CN206905412U CN206905412U CN201720268986.XU CN201720268986U CN206905412U CN 206905412 U CN206905412 U CN 206905412U CN 201720268986 U CN201720268986 U CN 201720268986U CN 206905412 U CN206905412 U CN 206905412U
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- dry storehouse
- drying device
- rotating disk
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Abstract
The utility model provides a kind of microwave vacuum freeze-drying device,The microwave vacuum freeze-drying device includes microwave storehouse,Dry storehouse,The microwave generator of transmission power continuously adjustabe,Refrigeration system,Vacuum water-trapping system,Pressure regulating system,Vavuum pump and micro computer central control system,The dry storehouse is arranged on the inside in the microwave storehouse,The microwave generator of the transmission power continuously adjustabe is fixed on the side wall in the microwave storehouse,Arranged around the dry storehouse uniform crossover,The refrigeration system is connected with the dry storehouse and the vacuum water-trapping system,The vacuum water-trapping system is connected with the vavuum pump and the dry storehouse,The pressure regulating system is connected with the vavuum pump and the dry storehouse,Pump is connected with the dry storehouse,Pump is connected with the dry storehouse,The micro computer central control system is connected with the microwave generator and the pressure regulating system respectively,To control microwave power and pressure.
Description
Technical field
A kind of freeze drying equipment is the utility model is related to, the vacuum freeze drying more particularly to using microwave as heating source is set
It is standby
Background technology
Vacuum Freezing ＆ Drying Technology is thorough due to being dehydrated, can retained product to greatest extent pattern and microstructure, and
Rehydration is fast, is increasingly valued by people.It is that water-containing materials are frozen into below eutectic temperature, makes the moisture in material
Directly distilled without thawing as a kind of dry technology of gas discharge in the case of condition of high vacuum degree with other solvents.Tradition
The mode of vacuum freeze drying generally use heat transfer the heat of sublimation is provided, length arid cycle of this mode of heating, energy disappears
Consumption is big, and cost is costly.Meanwhile this mode of heating is carried out at a higher temperature, when food is dried
Also the nutritional ingredient of food can be destroyed, is also easy to breed bacteria, the health of people is threatened.These shortcomings seriously govern
The development of Vacuum Freezing ＆ Drying Technology.
Microwave vacuum freeze dry technology can overcome disadvantages mentioned above.It is to be substituted with microwave heating in traditional freeze drying technology
Supplier as latent heat of sublimation of conduction or infrared radiation heating.Under microwave action, the dipole inside heated material
Molecule high-frequency reciprocating moves, and produces " interior frictional heat " and makes to be heated temperature of charge rise, without any heat transfer process, with regard to energy
Make material inside and outside while heat while heat up, will not cause to heat non-uniform phenomenon.
However, a greatest problem in microwave vacuum freeze technical field of drying puzzlement researcher is existed using microwave
Heated under lower pressure and glow discharge easily occurs.In microwave drying process, due to the raising of vacuum, gas is reduced
Disruptive field intensity, gas molecule is set to be easy to be ionized into ion, so as to which glow discharge phenomenon occur.This can lose microwave energy significantly
Amount, it is possible to cause to damage to equipment, drying sample can be also caused compared with havoc.In addition, dried in microwave vacuum freeze
In the later stage, with the reduction of sample moisture content, the energy required for distilling can also gradually decrease.If constantly with high-power micro-
Ripple heats to material, not only results in the quality that material is charred and influences freeze-drying prods, it is also possible to reduces the life-span of equipment.
Application No. 03249124.7, the China of entitled " the microwave freeze-drying equipment for being used for food production " are practical new
Type patent, food is thermally dried using microwave magnetron, food can be made inside and outside while heated, and make product centre and outer
The moisture of table is evaporated simultaneously, will not destroy by the nutritional ingredient of dried foods, the arid cycle of food is shortened into 5-6 times,
Reduce the cost of large-scale production.But the patent does not solve the problems, such as glow discharge of the microwave under lower pressure.Moreover,
The position geo-stationary of material and pallet, there is certain influence to the uniformity of product heating effect.
Application No. 200910181720.1, entitled " a kind of double-chamber differential pressure type microwave vacuum freeze drying equipment "
Chinese invention patent application, discloses a kind of microwave vacuum freeze-drying device, and the warehouse of the equipment is split by transmission cutoff board
Into the first bin and the second bin, magnetron is located at the first bin, and the vacuum of the first bin is less than electric discharge critical value, and material is held
Carry setting in the second bin, the second bin is connected by shielding flowing plate with cold-trap.It is but this by magnetron and material
Place space is separated, and glow discharge can not fundamentally be suppressed by allowing microwave to enter the method for material place warehouse by electromagnetic wave transparent material
The generation of phenomenon, because its second bin is still in the environment of condition of high vacuum degree, microwave still meeting under such vacuum
Discharge.In addition, even if microwave enters the first bin from routed entrance, it is reflected in the second bin through bulkhead and forms multi-mode microwave
, but because sample position to be freezed is fixed, the uniformity of microwave heating is greatly affected.
On the other hand, for aerogel material, in the drying means mainly used at present, supercritical drying can disappear well
Except the capillary tension in drying process, so as to maintain the integrality of material, but this method is high to equipment requirement, costly,
And larger danger in operating process be present；Conventional vacuum is freeze-dried reduces the cost of equipment to a certain extent, but by
In being dried by the way of conduction heating, uneven heating is even to cause aerogel material integrality to be destroyed；Although constant pressure and dry
Dry cost is greatly reduced, but sufficient surface modification need to be carried out to material before it is dried, arid cycle is elongated, reduces
Dry efficiency.Therefore, being urgently desirable to develop one kind can dry aerogel material thermally equivalent, and rate of drying is fast,
And rate of drying is substantially increased, the low drying means of energy consumption.
Utility model content
The utility model proposes that the purpose of this utility model is to provide a kind of solution well regarding to the issue above
The microwave vacuum freeze-drying device of glow discharge phenomenon.
To achieve these goals, according to one side of the present utility model, there is provided a kind of microwave vacuum freeze is dried
Equipment, including microwave storehouse, dry storehouse, the microwave generator of transmission power continuously adjustabe, refrigeration system, vacuum water-trapping system, pressure
Draught control system, vavuum pump and micro computer central control system, it is characterised in that the dry storehouse is arranged on the interior of the microwave storehouse
Portion, the microwave generator of the transmission power continuously adjustabe are fixed on the side wall in the microwave storehouse, uniform around the dry storehouse
Cross arrangement, the refrigeration system are connected with the dry storehouse and the vacuum water-trapping system, the vacuum water-trapping system and institute
State vavuum pump with the dry storehouse to be connected, the pressure regulating system is connected with the vavuum pump and the dry storehouse, described micro-
Computer central control system is connected with the microwave generator and the pressure regulating system respectively, to control the microwave generator institute
The microwave power of generation and the pressure regulating system adjust obtained pressure.
According to some embodiments of the utility model, the microwave computer central control system jointly controls pattern pair with predetermined
The microwave generator, the pressure regulating system are controlled so that the microwave power that is occurred of the microwave generator with
The pressure that the pressure regulating system adjusts to obtain is corresponding.
According to some embodiments of the utility model, the bottom of the dry storehouse is provided with rotating horizontally for motor drive
Rotating disk, be symmetrically provided with multiple miniature conveyer belts that can be moved back and forth on rotating disk.
According to some embodiments of the utility model, the micro computer central control system respectively with the rotating disk and described micro-
Type conveyer belt is connected to control the transmission frequency of the slewing rate of the rotating disk and the miniature conveyer belt respectively.
According to some embodiments of the utility model, the micro computer central control system is according to jointly controlling after pattern adjusts
The microwave power and the pressure adjust the rotating speed of the rotating disk.
According to some embodiments of the utility model, the rotating disk can horizontally rotate, and be worn between the rotating disk and motor
The part for crossing microwave storehouse uses the metallic shield with given size sieve aperture to cross flowing plate connection, and in the position through dry storehouse
It is provided with sealing gasket.
According to some embodiments of the utility model, by metal, electromagnetic wave transparent material is not made in the microwave storehouse, the dry storehouse
It is made up of nonmetallic electromagnetic wave transparent material and size and the microwave storehouse is into predetermined ratio.
According to some embodiments of the utility model, the refrigeration system and the dry storehouse and the vacuum water-trapping system
It is connected by pipeline, valve is provided with the pipeline, by refrigeration system described in Valve controlling and the dry storehouse and described
Opening and closing between vacuum water-trapping system, the pipeline between the refrigeration system and the microwave storehouse is by with given size sieve aperture
Flowing plate connection is crossed in metallic shield.
According to some embodiments of the utility model, the vacuum water-trapping system and vavuum pump, pressure regulating system and jelly
Dry storehouse is connected by pipeline, and the pipeline between the vacuum water-trapping system and the microwave storehouse is by the gold with given size sieve aperture
Category shielded flowing plate connection, and crossing flowing plate by the metallic shield with given size sieve aperture between the pipeline and dry storehouse connects
Connect, the vacuum water-trapping system bottom is provided with defrost valve.
According to some embodiments of the utility model, the microwave generator of the transmission power continuously adjustabe is realizing transmitting
While power continuously adjustabe, make the frequency constant of transmitting microwave.
One of according to microwave vacuum freeze-drying device of the present utility model, at least have the following technical effect that：
1st, effectively food can be dried, and homogeneous heating, speed are fast.
The 2nd, the effect that rotatable rotating disk produces microwave stirring is installed on dry storehouse, make microwave energy field more uniform,
The generation of glow discharge under low pressure is avoided well.
3rd, central control system to Microwave emission power, refrigeration machine and the control of dry storehouse bottom rotating disk be uniformly controlled maximum
The effect that ensure that material of limit.
4th, the aerogel material of extensive application prospect can also be dried for the utility model, and overcome biography
Unite freeze drying process the shortcomings that time-consuming, high energy consumption, can adapt to the large-scale industrial production of aerogel material.
The utility model is described in further detail with reference to the accompanying drawings and detailed description, but not with any side
Formula limits the utility model.
Brief description of the drawings
Fig. 1 is the structural representation according to the microwave vacuum freeze-drying device of the embodiment of the utility model one；
Fig. 2 is the top view of the rotating disk of microwave vacuum freeze-drying device shown in Fig. 1.
In figure：1st, the microwave generator of transmission power continuously adjustabe, 2, microwave storehouse, 3, dry storehouse, 4, vacuum water-trapping system,
5th, pressure regulating system, 6, vavuum pump, 7, refrigeration system, 8-1, valve 1,8-2, valve 2,9, sealing gasket, 10, motor, 11, band
Flowing plate is crossed in the metallic shield for having regulation sieve aperture, and 12, rotating disk, 13-1, lyophilized door, 13-2, microwave door, 14, defrost valve, 15,
Micro computer central control system, 16, miniature conveyer belt
Embodiment
According to embodiment of the present utility model, there is provided a kind of microwave vacuum freeze-drying device (hereinafter referred to as this practicality
New equipment), including microwave storehouse, dry storehouse, the microwave generator of transmission power continuously adjustabe, refrigeration system, vacuum catch water
System, pressure regulating system, vavuum pump and micro computer central control system.
Wherein the microwave generator of transmission power continuously adjustabe, pressure regulating system can be unified by micro computer central control system
Control, by operator according to setting program is actually needed, so as to which the micro computer central control system being capable of automatic control and adjustment items
Parameter, complete the drying of the material.
By metal, electromagnetic wave transparent material such as stainless steel is not made in microwave storehouse, and its shape can be cube.Dry storehouse is arranged on
The inside in microwave storehouse, and positioned at the center of bottom, size and microwave storehouse are proportional, and generally, the ratio is 35%-
85%, preferably 40%-80%, more preferably 40%-75%, most preferably 45%-65%.
Dry storehouse is made up of nonmetallic electromagnetic wave transparent material such as polytetrafluoroethylene (PTFE), glass or ceramics, is selected in the present embodiment
Polytetrafluoroethylmaterial material, the entrance of microwave was both can guarantee that, and reduced lossy microwave, there is certain intensity again, in condition of high vacuum degree
Under the conditions of will not produce microwave from leakage.
The microwave generator of transmission power continuously adjustabe is fixed on the side wall in microwave storehouse, around dry storehouse uniform crossover row
Row, it is connected and is controlled by it with micro computer central control system.Preferably, the microwave generator of the transmission power continuously adjustabe is being protected
In the case that card transmitting microwave frequency is constant, the transmission power of continuously adjustable microwave.
Dry storehouse bottom is provided with the rotating disk that can be rotated horizontally of motor drive, and 8 are symmetrically provided with rotating disk can be
The radially reciprocating miniature conveyer belt of rotating disk.The miniature conveyer belt on rotating disk and the rotating disk that can be horizontally rotated is not by
The polytetrafluoroethylmaterial material for absorbing microwave is made.Part between rotating disk and motor through microwave storehouse is used with certain size sieve
The metal shielding board connection in hole, while the position through dry storehouse is provided with sealing gasket.The small conveyer belt can guarantee that material
It while being rotated with rotating disk, can also be moved on the direction of vertical plane, make material heated evenly.
Refrigeration system is connected with dry storehouse and vacuum water-trapping system by pipeline, can be controlled between them by valve
Opening and closing.Pipeline between refrigeration system and microwave storehouse crosses flowing plate connection by the metallic shield with certain size sieve aperture.The pipe
Road can use tetrafluoro glass fiber material.Tetrafluoro glass fiber material is the low damage material of microwave, and this material, which can guarantee that, to be stretched into microwave storehouse
Part do not absorb microwave energy.
Vacuum water-trapping system can absorb to the sublimation gases in drying process, with vavuum pump, pressure regulating system and
Dry storehouse is connected by pipeline, and the pipeline between vacuum water-trapping system and microwave storehouse is by the metallic shield with certain size sieve aperture
Cross flowing plate connection.The pipeline uses tetrafluoro glass fiber material, passes through the metal screen with certain size sieve aperture between dry storehouse
Flowing plate connection was covered, ensures that microwave does not enter pipeline.In addition, defrost valve is installed in the bottom of vacuum water-trapping system.
The said equipment can be used for material is dried.The base that method of the present utility model is freeze-dried in traditional vacuum
On plinth, the drying that latent heat of sublimation carries out material is provided by microwave heating.
In practical operation, material is placed in dry storehouse.The microwave of microwave generator transmitting can pass through dry storehouse
Wall is added on material, and the reflection that will also pass through microwave storehouse inwall for not entering into dry storehouse is eventually entered in dry storehouse by thing
Material absorbs.Micro computer central control system controls to adjust the change of the changing pattern, pressure of microwave power by advance program setting
Pattern and amplitude of variation, the relative change matching model of pressure and microwave power, the rotating speed of rotating disk, the motion frequency of miniature conveyer belt
The parameters such as rate, so as to realize that treating lyophilized sample by applying microwave under vacuum is dried.
The method that material is dried to equipment of the present utility model and using the equipment referring now to Fig. 1 is illustrated such as
Under.
Fig. 1 is a kind of structural representation of embodiment of the utility model device.It is continuous that the equipment includes transmission power
Adjustable microwave generator 1, microwave storehouse 2, dry storehouse 3, vacuum water-trapping system 4, pressure regulating system 5, vavuum pump 6, refrigeration system
System 7, motor 10, micro computer central control system 15, miniature conveyer belt 16 and some additional devices.
Supplier of the microwave generator 1 of the transmission power continuously adjustabe as the utility model microwave heat source,
Frequency is fixed as 2450MHz, the inwall installed in microwave storehouse 2, is arranged around the uniform crossover of dry storehouse 3, thus micro-
Under the conciliation of computer central control system, the microwave of release can be made more uniformly to be added on dry storehouse 3.
Microwave storehouse 2 is cubic type, and by metal, electromagnetic wave transparent material such as stainless steel is not made, in one kind in whole microwave storehouse
Atmospheric pressure environment.
The dry storehouse 3 is arranged on the center position of the bottom of microwave storehouse 2, and size and microwave storehouse 2 are in certain proportion, such as should
Ratio is 45%-65%.
Vacuum water-trapping system 4 passes sequentially through tetrafluoro glass fiber pipe and is connected with pressure regulating system 5, vavuum pump 6, and right side passes through
Pipeline passes through microwave storehouse 2, is finally connected with dry storehouse 3, and flowing plate 11 is crossed in the part of contact with the metallic shield with certain sieve aperture
It is connected, ensures that the microwave in microwave storehouse 2 is not revealed, the microwave in dry storehouse 3 does not enter among pipeline.
Pressure regulating system 5 passes through micro computer central control system in the OK range 0-100pa that pressure meets lyophilized demand
Operating pressure, and then field strength threshold value corresponding to raising electric discharge can be properly increased, glow discharge phenomenon is not occurred.
The side of the refrigeration system 7 passes through microwave storehouse 2 by pipeline, is connected with the dry storehouse 3, through microwave storehouse 2
Part flowing plate connection is crossed by the metallic shield with given size sieve aperture, ensure that the microwave in microwave storehouse 2 will not be revealed.Valve
8-1 can be opened and closed, and Open valve 8-1 when pre-freeze is carried out to material, material is condensed rapidly, treat that material freezes
Knot, closes valve 8-1, and vavuum pump 6 is started working.The opposite side of refrigeration system 7 connects vacuum water-trapping system 4 by pipeline, together
Sample, valve 8-2 can also be opened and closed.
The part that the motor 10 is stretched into microwave storehouse 2 and dry storehouse 3 is made up of tetrafluoro glass fiber material, through microwave storehouse 2
Part flowing plate 11 crossed by the metallic shield with certain sieve aperture connected, ensure that the microwave in microwave storehouse 2 is not revealed.Through lyophilized
The part in storehouse 3 is added with sealing gasket 9, the sealing and vacuum of guarantee dry storehouse 3.
Flowing plate 11 is crossed in the metallic shield with given size sieve aperture, is made up of metal copper plate, and sieve aperture above passes through
Precision measuring and calculating, can accomplish to prevent microwave leakage.
Rotating disk 12 is made up of polytetrafluoroethylmaterial material, in collar plate shape.On rotating disk 12 around center be distributed with piling 8 it is micro-
Type conveyer belt 16, it is miniature to send band 16 to be made up of polytetrafluoroethylmaterial material, control rotating disk to rotate by the micro computer central control system 15
Speed and miniature conveyer belt motion frequency, ensure material with rotating disk 12 rotate while, also can be in vertical plane
Direction on move, be allowed to be uniformly heated.Microwave energy concentration is avoided to a certain extent, reduces generation glow discharge
Odds.
Enter line program setting to micro computer central control system 15, it is automatically adjusted microwave work(in the freeze-drying process of material
The changing pattern of rate, the changing pattern of pressure and amplitude of variation, the relative change matching model of pressure and microwave power, rotating disk
The parameter such as motion frequency of rotating speed, miniature conveyer belt, so as to complete the drying of material.
Embodiment 1
In the present embodiment, banana pieces are freezed using the equipment shown in Fig. 1, carrying out practically process is as follows：
Microwave door 13-2 and lyophilized door 13-1 is opened, treats that lyophilized banana pieces are respectively placed on rotating disk 12 by some
On miniature conveyer belt 16.Lyophilized door 13-1 and microwave door 13-2 is closed successively.The banana pieces are first cut into 1cm × 1cm in advance
× 1cm cube fritter, mutual spacing about 0.5cm, is evenly spaced on Minitype transmission band 16.
Refrigeration system 7 and valve 8-1 and 8-2 are opened, freezes the banana pieces on rotating disk 12, and make vacuum water-trapping system temperature
It is rapidly reduced to -20 DEG C.
Enter line program setting to micro computer central control system, it is automatically adjusted microwave work(in the freeze-drying process of banana pieces
The changing pattern of rate, the changing pattern of pressure and amplitude of variation, the relative change matching model of pressure and microwave power, rotating disk
The parameter such as motion frequency of rotating speed, miniature conveyer belt.
Treat that banana pieces are freezed, while closing valve 8-1, open vavuum pump 6, now the vacuum in dry storehouse 3 is rapid
Improve.
When pressure regulating system 5 shows that pressure is reduced to the pressure limit such as 5-30Pa pre-set, in micro computer
Control system meeting starter motor 10 and miniature conveyer belt 16, make banana pieces by given pace setting in motion.
Micro computer central control system opens the microwave generator 1 of transmission power continuously adjustabe, and microwave starts to burst into dry storehouse 3
It is interior, the banana pieces freezed are heated.
With the progress of heating, the moisture in banana pieces starts to distil, and steam is finally all inhaled into vacuum water-trapping system 4
Receive, the pressure in dry storehouse 3 is not raised.
Dry carry out during, according to pressure regulating system 5 show pressure change, ensure dry needed for pressure
In the range of, micro computer central control system can suitably adjust the pressure in rise dry storehouse.In addition, micro computer central control system is according to micro-
The changing pattern of wave power, the changing pattern of pressure and amplitude of variation automatically adjust the motion of the rotating speed and miniature conveyer belt of rotating disk
Frequency.
As the transmission power of power continuously adjustabe microwave generator 1 gradually reduces, banana pieces drying is also close to completion.When
When the pressure that pressure regulating system 5 is shown no longer changes, illustrate that banana pieces are completely dried.
When 5 registration no longer changes within the regular hour, micro computer central control system closes transmission power successively
Microwave generator 1, motor 10 and the and of miniature conveyer belt 16 of continuously adjustabe, manual-lock vavuum pump 6, refrigeration system 7 and valve
8-2, the defrost valve 14 of vacuum water-trapping system 16 is opened, allows air to enter dry storehouse 3.
Treat that pressure regulating system 5 is shown as normal pressure, open microwave door 13-2 and lyophilized door 13-1 successively, take out lyophilized
Banana pieces, freeze terminate.After measured, the moisture of Bananas block is down to less than 4%.
Embodiment 2
The present embodiment, specific design mode is with embodiment 1, for freezing to cellulose SiO2 aerogel composites
It is dry.Carrying out practically process is as follows：
Microwave door 13-2 and lyophilized door 13-1 is opened, treats that the compound wet gels of lyophilized cellulose SiO2 are distinguished by some
It is placed on the miniature conveyer belt 16 on rotating disk 12.Lyophilized door 13-1 and microwave door 13-2 is closed successively.The wet gel is
Cube block or sheet material, mutual spacing about 2cm, are evenly spaced on Minitype transmission band 16.
Refrigeration system 7 and valve 8-1 and 8-2 are opened, freezes the wet gel on rotating disk 12, and make vacuum water-trapping system temperature
It is rapidly reduced to -45 DEG C.
Enter line program setting to micro computer central control system, it is automatically adjusted microwave work(in the freeze-drying process of wet gel
The changing pattern of rate, the changing pattern of pressure and amplitude of variation, the relative change matching model of pressure and microwave power, rotating disk
The parameter such as motion frequency of rotating speed, miniature conveyer belt.
Treat that hydrogel freezes, while closing valve 8-1, open vavuum pump 6, now the vacuum in dry storehouse 3 is rapid
Improve.
When pressure regulating system 5 shows that pressure is reduced to the pressure limit such as 10-30Pa pre-set, in micro computer
Control system meeting starter motor 10 and miniature conveyer belt 16, the gel mass for making to freeze is by given pace setting in motion.
Micro computer central control system opens the microwave generator 1 of transmission power continuously adjustabe, and microwave starts to burst into dry storehouse 3
It is interior, the gel mass freezed is heated.
With the progress of heating, moisture and other solvents in the gel mass freezed start to distil, and the gas of distillation enters
Enter vacuum water-trapping system 4, the pressure in dry storehouse 3 is not raised.
Dry carry out during, according to pressure regulating system 5 show pressure change, ensure dry needed for pressure
In the range of, micro computer central control system can suitably adjust the pressure in rise dry storehouse.Meanwhile micro computer central control system is according to micro-
The relative change matching model of the changing pattern of wave power, the changing pattern of pressure and amplitude of variation, pressure and microwave power is certainly
The rotating speed of dynamic regulation rotating disk and the motion frequency of miniature conveyer belt.
As the transmission power of power continuously adjustabe microwave generator 1 gradually reduces, gel mass drying is also close to completion.
When the pressure that pressure regulating system 5 is shown no longer changes, illustrate that wet gel has been completely dried.
When 5 registration no longer changes within the regular hour, micro computer central control system closes transmission power successively
Microwave generator 1, motor 10 and the and of miniature conveyer belt 16 of continuously adjustabe, manual-lock vavuum pump 6, refrigeration system 7 and valve
8-2, the defrost valve 14 of vacuum water-trapping system 16 is opened, allows air to enter dry storehouse 3.
Treat that pressure regulating system 5 is shown as normal pressure, open microwave door 13-2 and lyophilized door 13-1 successively, take out lyophilized
Aeroge, freeze terminate.After measured, the moisture of cellulose SiO2 composite aerogels is down to less than 3%.
To sum up, the advantages of the utility model has following aspects：
1st, dry storehouse is placed in microwave storehouse, and positioned at the center of bottom, the microwave that microwave generator is launched is through bursting
What entrance entered is an atmospheric pressure environment, then just enters the dry storehouse in vacuum state, will not be put during this
Electrical phenomena.
2nd, the microwave generator of transmission power continuously adjustabe is applied, in the case where ensureing that microwave frequency is certain, micro- electricity
The program of brain central control system sets the changing pattern that can control microwave power, can change the field strength in dry storehouse, utilize pressure
Regulating system, in the case where ensureing that pressure is in normal range (NR), operating pressure is properly increased, it is constantly in generation aura
Under the field strength threshold value of electric discharge, the generation of electric discharge phenomena can be avoided.
3rd, the work(of microwave generator is being continuously adjusted using the microwave generator of power continuously adjustabe, micro computer central control system
Rate coordinates the miniature conveyer belt on rotating disk and rotating disk to ensure that the uniformity for carrying out microwave heating to material, central control system setting
Program can be according to the pressure change pattern and amplitude of variation in dry storehouse, and the relative change mating die of pressure and microwave power
Formula, automatically adjust the rotating speed of rotating disk and the frequency of miniature conveyer belt motion.Each block of material is additionally, since all simultaneously two sides
Motion upwards, avoids the heating problem of non-uniform that material position is fixed or material and rotating disk geo-stationary are brought.
4th, aerogel material can be dried, and dried thorough, there is provided a kind of drying of new aerogel material
Method.
Although describing the utility model with reference to specific embodiment, it will be understood by those skilled in the art that not
Deviate under the scope of the utility model, various change, and its alternative key element of equivalent can be carried out.Therefore, the utility model
Disclosed specific embodiment is not limited to, but it includes all embodiment party fallen within the scope of the appended claims
Formula.
Claims (10)
1. a kind of microwave vacuum freeze-drying device, including microwave storehouse, dry storehouse, the microwave of transmission power continuously adjustabe occur
Device, refrigeration system, vacuum water-trapping system, pressure regulating system, vavuum pump and micro computer central control system,
Characterized in that,
The dry storehouse is arranged on the inside in the microwave storehouse,
The microwave generator of the transmission power continuously adjustabe is fixed on the side wall in the microwave storehouse, uniform around the dry storehouse
Cross arrangement,
The refrigeration system is connected with the dry storehouse and the vacuum water-trapping system,
The vacuum water-trapping system is connected with the vavuum pump and the dry storehouse,
The pressure regulating system is connected with the vavuum pump and the dry storehouse,
The micro computer central control system is connected with the microwave generator and the pressure regulating system respectively, described micro- to control
The microwave power and the pressure regulating system that wave producer is occurred adjust obtained pressure.
2. microwave vacuum freeze-drying device according to claim 1, it is characterised in that the micro computer central control system with
The predetermined pattern that jointly controls is controlled to the microwave generator, the pressure regulating system, so that the microwave occurs
The microwave power that device is occurred is corresponding with the pressure that the pressure regulating system adjusts to obtain.
3. microwave vacuum freeze-drying device according to claim 1 or 2, it is characterised in that the bottom of the dry storehouse
Be provided with the rotating disk that can be rotated horizontally of motor drive, be symmetrically provided with the rotating disk it is multiple can be along the footpath of the rotating disk
To reciprocating miniature conveyer belt.
4. microwave vacuum freeze-drying device according to claim 3, it is characterised in that the micro computer central control system point
It is not connected with the rotating disk and the miniature conveyer belt to control the slewing rate of the rotating disk and the miniature transmission respectively
The transmission frequency of band.
5. microwave vacuum freeze-drying device according to claim 4, it is characterised in that the micro computer central control system root
The rotating speed of the rotating disk is adjusted according to the microwave power after pattern is adjusted and the pressure is jointly controlled.
6. microwave vacuum freeze-drying device according to claim 3, it is characterised in that the rotating disk horizontal can turn
Dynamic, the part between the rotating disk and motor through microwave storehouse uses the metallic shield with given size sieve aperture to cross flowing plate company
Connect, and the position through dry storehouse is provided with sealing gasket.
7. microwave vacuum freeze-drying device according to claim 1, it is characterised in that the microwave storehouse is impermeable by metal
Wave material is made, and the dry storehouse is made up of nonmetallic electromagnetic wave transparent material and size and the microwave storehouse are into predetermined ratio.
8. microwave vacuum freeze-drying device according to claim 1, it is characterised in that the refrigeration system with it is described
Dry storehouse is connected with the vacuum water-trapping system by pipeline, and valve is provided with the pipeline, passes through system described in Valve controlling
Opening and closing between cooling system and the dry storehouse and the vacuum water-trapping system, between the refrigeration system and the microwave storehouse
Pipeline crosses flowing plate connection by the metallic shield with given size sieve aperture.
9. microwave vacuum freeze-drying device according to claim 1, it is characterised in that the vacuum water-trapping system with it is true
Empty pump, pressure regulating system and dry storehouse are connected by pipeline, the pipeline between the vacuum water-trapping system and the microwave storehouse
Flowing plate connection is crossed by the metallic shield with given size sieve aperture, by being sieved with given size between the pipeline and dry storehouse
Flowing plate connection is crossed in the metallic shield in hole, and the vacuum water-trapping system bottom is provided with defrost valve.
10. microwave vacuum freeze-drying device according to claim 1, it is characterised in that the transmission power continuously may be used
The microwave generator of tune makes the frequency constant of transmitting microwave while transmission power continuously adjustabe is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268986.XU CN206905412U (en) | 2017-03-17 | 2017-03-17 | Microwave vacuum freeze-drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268986.XU CN206905412U (en) | 2017-03-17 | 2017-03-17 | Microwave vacuum freeze-drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206905412U true CN206905412U (en) | 2018-01-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839661A (en) * | 2017-03-17 | 2017-06-13 | 澍澎（北京）新材料科技有限公司 | The drying means of microwave vacuum freeze-drying device and material |
| CN115307387A (en) * | 2022-08-12 | 2022-11-08 | 深圳市康乐态原科技企业 | Microwave vacuum freeze-drying box module, table type microwave vacuum freeze-drying device and freeze-drying process |
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2017
- 2017-03-17 CN CN201720268986.XU patent/CN206905412U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839661A (en) * | 2017-03-17 | 2017-06-13 | 澍澎（北京）新材料科技有限公司 | The drying means of microwave vacuum freeze-drying device and material |
| CN115307387A (en) * | 2022-08-12 | 2022-11-08 | 深圳市康乐态原科技企业 | Microwave vacuum freeze-drying box module, table type microwave vacuum freeze-drying device and freeze-drying process |
| CN115307387B (en) * | 2022-08-12 | 2024-05-07 | 深圳市康乐态原科技企业 | Microwave vacuum freeze-drying box module, table type microwave vacuum freeze-drying device and freeze-drying process |
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