CN111561810A - Vacuum freeze drying device - Google Patents
Vacuum freeze drying device Download PDFInfo
- Publication number
- CN111561810A CN111561810A CN202010437796.2A CN202010437796A CN111561810A CN 111561810 A CN111561810 A CN 111561810A CN 202010437796 A CN202010437796 A CN 202010437796A CN 111561810 A CN111561810 A CN 111561810A
- Authority
- CN
- China
- Prior art keywords
- box body
- air
- pipe
- box
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The application relates to the field of vacuum drying, and particularly discloses a vacuum freeze drying device which comprises a drying box, a heating system for heating the drying box and a vacuum system for vacuumizing the drying box, wherein the drying box comprises a box body and a door body, and an opening is formed in one side surface of the box body; the periphery of the box body is provided with an interlayer, the inner cavity of the box body is separated from the interlayer, and the inner wall of the box body is provided with a middle one-way valve; the vacuum system comprises an air extractor, an air extracting main pipe and a plurality of exhaust branch pipes, wherein an air extracting opening of the air extractor is communicated with an inner cavity of the box body through the air extracting main pipe, an air exhaust opening of the air extractor is connected with the exhaust branch pipes, the exhaust branch pipes are uniformly distributed on the outer wall of the box body and are fixed with the outer wall of the box body, a plurality of fins are uniformly distributed on the outer wall of the box body, and a heat preservation layer is arranged on the periphery of the box. The cooling is carried out to fin and exhaust branch in freezing, directly utilizes exhaust branch's low temperature to condense sublimed steam, can improve energy utilization.
Description
Technical Field
The invention relates to the technical field of vacuum drying, in particular to a vacuum freeze drying device.
Background
The vacuum freeze drying process is generally divided into pre-freezing, first-stage drying and second-stage drying, wherein the pre-freezing solidifies free water in the material, so as to prevent irreversible generation of foaming, concentration, solute movement and the like under vacuum and enable products before and after drying to have the same shape; in the first stage, the ice crystals are sublimated into water vapor to overflow the materials to dehydrate and dry the materials, the materials in the freeze drying box are properly heated in the first stage, and the water vapor condenser is kept at a low temperature to condense the water vapor overflowing from the materials, so that ninety percent of water in the materials can be removed in the process; the second stage drying is also called as analytic drying, because after the first stage drying is finished, a part of moisture is also adsorbed on capillary tubes and polar groups of the drying material, because the adsorption energy is high, higher energy is required to be provided, the temperature of the heating material is higher than the temperature of the first stage drying, but the material is not burnt out, in the first stage and the second stage of the traditional freeze dryer, the material in the drying box is generally heated by an electric heating mode, a circulating heating system is required to be added, for an indirect heating system, when the first stage and the second stage drying are carried out, the freeze drying box needs to be heated, a water vapor condenser needs to be refrigerated to capture water vapor from the drying box, after the drying is finished, the water vapor condenser needs to be heated to melt and discharge ice, the thermoelectric system has the unique advantages and high temperature control precision, and can switch the cooling end by changing the direction of current, the heating end has been developed rapidly in recent years.
Disclosure of Invention
The invention aims to provide a vacuum freeze drying device to improve the energy utilization rate.
The vacuum freeze drying device comprises a drying box, a heating system for heating the drying box and a vacuum system for vacuumizing the drying box, wherein the drying box comprises a box body and a door body, an opening is formed in one side face of the box body, and the door body can seal the opening; the periphery of the box body is provided with an interlayer, when the door body is opened, the inner cavity and the interlayer of the box body are both communicated with the outside through the opening, when the door body is closed, the inner cavity and the interlayer of the box body are isolated, the inner wall of the box body is provided with a middle one-way valve, the air inlet end of the middle one-way valve is communicated with the interlayer, and the air outlet end of the middle one-way valve is communicated with the inner cavity of the box body; the vacuum system comprises an air extractor, an air extracting main pipe and a plurality of exhaust branch pipes, wherein an air extracting opening of the air extractor is communicated with an inner cavity of the box body through the air extracting main pipe, an air exhaust opening of the air extractor is connected with the exhaust branch pipes, the exhaust branch pipes are uniformly distributed on the outer wall of the box body and fixed with the outer wall of the box body, a plurality of fins are uniformly distributed on the outer wall of the box body, and a heat preservation layer is arranged on the periphery of the box body.
The beneficial effect of this scheme lies in:
(1) when the door body seals the box body, materials to be dried in the drying box are pre-frozen. When the material to be dried is pre-frozen, the inner cavity of the box body is not vacuumized; therefore, the low temperature in the inner cavity of the box body is transferred to the outside until the heat insulation layer has the function of blocking heat transfer, namely, the fins and the exhaust branch pipe are also in a low-temperature state. After the pre-freezing is finished, the inner cavity of the box body is vacuumized, and the middle one-way valve is switched on while the inner cavity of the box body is vacuumized, so that the interlayer is also in a vacuum state. After the drying in the first stage, the inner cavity of the box body needs to be heated properly to sublimate the frozen water; in the process, the interlayer is in a vacuum state and has a partition effect on the fins and the inner cavity of the box body, so that the fins can still be kept in a low-temperature state after the temperature of the inner cavity of the box body is increased. At the air extractor during operation, the steam after the sublimation will be inhaled the air extractor and discharge through exhaust branch pipe, and because exhaust branch pipe process fin to steam can be at the intraductal condensation of exhaust branch into water, thereby avoids steam to be absorbed by other electrical equipment, shortens electrical equipment's life.
(2) When freezing through treating the freezing material to box inside in this scheme, can cool down fin and exhaust branch simultaneously, then when the drying of first stage, can directly utilize exhaust branch's low temperature to sublime steam and condense to need not cool down exhaust branch alone, with the sublime steam of condensation.
(3) After the door body is opened, the outside air can enter the interlayer again, so that the drying box can be used next time.
The first preferred scheme is as follows: as a further optimization of the basic scheme, an air box is arranged below the drying box, the air box is communicated with the inner cavity of the box body through a communicating pipe, and a stop valve is arranged on the communicating pipe; a dryer is arranged at one end of the communicating pipe connected with the drying box; the fin extends to the outer periphery of the communication pipe.
In the first preferred scheme, after the first stage of freezing is completed, the stop valve is opened, and then the air in the air box expands and enters the inner cavity of the box body. The air inflation in the gas tank will consume the internal energy of gas tank air to when the air got into the box inner chamber through communicating pipe, aqueous vapor in the air will liquefy, and the fin extends to the periphery of communicating pipe, makes communicating pipe also maintain at lower temperature, thereby is favorable to the aqueous vapor absorption of liquefaction at the lateral wall of communicating pipe. And the desicator can further carry out the drying to the air that gets into the box inner chamber, improves the degree of dryness that gets into the inside air of box, is favorable to treating the dry material to carry out the drying of second stage. In addition, before the air passes through the dryer, partial moisture in the air is adsorbed on the side wall of the communicating pipe, so that the service life of the dryer can be prolonged.
The preferred scheme II is as follows: as a further optimization of the first preferred scheme, the top of the drying box is connected with an exhaust pipe, and the end part of the exhaust pipe is in threaded connection with a blocking block; the gas tank is connected with an auxiliary pipe, and a reciprocating mechanism is arranged in the auxiliary pipe; the reciprocating mechanism comprises a sleeve which is in sliding connection with the auxiliary pipe and is provided with a tension spring connected with the sleeve, the side walls of the sleeve and the auxiliary pipe are provided with a spiral groove and a spiral rib which are matched with each other, a power block which is rotationally connected with the auxiliary pipe is arranged in the sleeve, the power block is rotationally connected with the sleeve through a one-way bearing, and the power block is connected with the blocking block through a telescopic rod.
In the second preferred scheme, after the air box is communicated with the drying box, the air pressure in the air box is reduced, so that the sleeve in the auxiliary pipe overcomes the elasticity of the tension spring and slides to one side of the air box; the sleeve and the tension spring form a spring vibrator structure, and the sleeve vibrates in the auxiliary pipe in a reciprocating manner; because the thread groove and the thread rib which are matched with each other are arranged between the sleeve and the auxiliary pipe, the sleeve can also rotate to and fro relative to the auxiliary pipe in the reciprocating vibration process; the power block is connected with the sleeve through the one-way bearing, and in the reciprocating rotation process of the sleeve, the sleeve drives the power block to rotate in a one-way mode, and the power block drives the blocking block to rotate, so that the blocking block does not block the exhaust pipe any more; so that the moisture produced during the second stage of drying of the material to be dried will be discharged from the exhaust pipe.
The preferable scheme is three: as a further optimization of the second preferred scheme, the telescopic rod comprises a first rod and a second rod, one end of the first rod is sleeved at one end of the second rod, and the first rod is in splined connection with the second rod.
In the reciprocating motion process of the sleeve, in order to avoid the separation of the power block and the one-way bearing, the power block is arranged to reciprocate together with the sleeve, so that the distance between the power block and the blocking block is changed in a reciprocating manner; the telescopic rod is provided with a first rod and a second rod which are sleeved through a spline, so that the distance between the power block and the blocking block can be conveniently adjusted; and the spline connection enables the power block to drive the blocking block to rotate.
The preferable scheme is four: as a further optimization of the third preferred scheme, an object carrying plate is arranged in the box body and is connected with the inner wall of the box body through a spring.
In preferred scheme four, the air in the air box expands rapidly and gets into in the inner chamber of box, will make to form the air current of vibration in the inner chamber of air box to the drive carries the thing board vibration, thereby makes the material vibration on carrying the thing board, consequently is favorable to increasing the clearance between the material, is convenient for carry out the drying of second stage to the material.
The preferable scheme is five: as a further optimization of the preferable scheme four, a first one-way valve is arranged at one end of the auxiliary pipe communicated with the box body, the air inlet end of the first one-way valve is communicated with the auxiliary pipe, and the air outlet end of the first one-way valve is communicated with the air box; a second one-way valve is arranged on the side wall of the auxiliary pipe, the air inlet end of the second one-way valve is communicated with the outside, the air outlet end of the second one-way valve is communicated with the auxiliary pipe, and the sleeve pipe blocks the second one-way valve when the tension spring is in a natural extension and compression state; the auxiliary pipe is sealed towards one end of the blocking block, two ends of the auxiliary pipe are connected through the balance pipe, the balance pipe is provided with an electromagnetic directional valve, when the electromagnetic directional valve is in a first switching position, the balance pipe communicates two ends of the auxiliary pipe, when the electromagnetic directional valve is in a second switching position, one end of the auxiliary pipe towards the blocking block is communicated with the outside, the side wall of the auxiliary pipe is provided with a contact switch located between the sleeve and the air box, the contact switch is electrically connected with the electromagnetic directional valve, and after the sleeve is in optical contact with the contact switch, the electromagnetic directional valve is switched into the first switching position from the second switching position.
In a preferred scheme five, when the sleeve slides to one side of the air box, the side wall of the sleeve seals the second one-way valve; therefore, at the moment of opening the stop valve, namely when the air in the air box expands to the inner cavity of the box body, the auxiliary pipe cannot rapidly supplement the air in the air box; and in the subsequent casing pipe vibration process, the second one-way valve connects the auxiliary pipe with the outside in a clearance mode, so that the interior of the drying box and the interior of the air box are gradually increased to the normal pressure subsequently. When air in the air box expands, the auxiliary pipe is blocked by the sleeve pipe, so that a large pressure difference is formed on two sides of the sleeve pipe, the amplitude of reciprocating vibration of the sleeve pipe in the auxiliary pipe is large, and the plug block can be unscrewed by the power block.
The preferable scheme is six: as a further optimization of the preferable scheme five, the stop valve is arranged at the connection position of the communicating pipe and the gas tank; after the air tank is opened, the air in the air tank will enter the auxiliary pipe quickly, so that the air in the air tank will expand in the auxiliary pipe first to facilitate the atomization and condensation of water vapor in the air.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is an enlarged view of a portion B in fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a box body 10, an interlayer 11, fins 12, a heat insulation layer 13, a loading plate 14, an intermediate one-way valve 15, an air extractor 20, an air extraction main pipe 21, an air exhaust branch pipe 22, an air exhaust pipe 30, a blocking block 31, an air exhaust port 32, an air tank 40, a communication pipe 41, a stop valve 42, a dryer 43, an auxiliary pipe 50, a first one-way valve 51, a tension spring 52, a second one-way valve 53, a reciprocating mechanism 60, a sleeve 61, a power block 62, a one-way bearing 63, a balance pipe 64, an electromagnetic reversing valve 65, a contact switch 66 and a telescopic rod 67.
The embodiments are substantially as shown in figures 1, 2 and 3:
the vacuum freeze drying device comprises a drying box, an air box 40 arranged below the drying box, a heating system used for heating the drying box and a vacuum system used for vacuumizing the drying box. The drying box comprises a box body 10 and a door body, wherein an opening is formed in the front face of the box body 10, interlayers 11 are arranged on the left side face, the right side face and the rear side face of the box body 10, and an opening is also formed in one side, facing the front face of the box body 10, of each interlayer 11; the front side of the box body 10 is connected with a door body, the right side edge of the door body is hinged to the right side edge of the front side of the box body 10, and the left side of the front side of the box body 10 and the left side of the door body are provided with a lock body and a lock catch which are matched with each other, so that the door body can seal the opening of the box body 10 and the opening of the interlayer 11; when the door body is in an open state, the opening on the front surface of the box body 10 and the opening of the interlayer 11 are both in an open state. In addition, a middle one-way valve 15 is arranged on the inner wall of the box body 10, the air inlet end of the middle one-way valve 15 is communicated with the interlayer 11, and the air outlet end of the middle one-way valve 15 is communicated with the inner cavity of the box body 10; when the inner cavity of the box body 10 is vacuumized, air in the interlayer 11 is sucked out through the middle one-way valve 15, so that the interlayer 11 is also in a vacuum state, and the interlayer 11 can be restored to a normal pressure state only after the door body is opened.
The vacuum system comprises an air extractor 20, an air extraction main pipe 21 and a plurality of exhaust branch pipes 22, and is arranged at the top of the drying box. The air suction port of the air suction machine 20 is communicated with the inner cavity of the box body 10 through an air suction main pipe 21, and the air suction main pipe 21 extends into the inner cavity of the box body 10 from the top of the box body 10; the main air exhaust pipe 21 is provided with an electromagnetic valve, the electromagnetic valve and the air exhauster 20 are controlled by the same control switch, namely the air exhauster 20 and the electromagnetic valve can be simultaneously opened by opening the control switch; when the control switch is turned off, the solenoid valve and the air pump 20 are simultaneously turned off, so that the inner chamber of the tank 10 is prevented from being communicated with the outside through the air pump 20 when the air pump 20 stops operating. An air outlet 32 of the air extractor 20 is connected with an exhaust branch pipe 22, the exhaust branch pipe 22 is uniformly distributed on the outer wall of the box body 10 and is fixed with the outer wall of the box body 10, a plurality of fins 12 are uniformly distributed on the outer wall of the box body 10, and the fins 12 are arranged in a grid shape along the transverse direction and the vertical direction in a staggered mode; the inside material that is used for loading to dry of drying cabinet, mainly dry the material through freeze-drying's mode in this scheme, before drying the material, need freeze the material in the drying cabinet under the ordinary pressure, and fin 12 will become the low temperature state with the material that freezes in the drying cabinet under the mode of heat-conduction. In addition, the heat insulation layer 13 is arranged on the periphery of the box body 10 and in the door body, and the fins 12 are arranged in a grid shape, so that the heat insulation layer 13 and the box body 10 are fixed conveniently.
The air tank 40 is connected to the inner cavity of the cabinet 10 of the drying cabinet through a connection pipe 41, and a stop valve 42 is provided on the connection pipe 41. When the shutoff valve 42 is closed, the air in the tank 10 and the air tank 40 cannot flow. The dryer 43 is arranged at the upper end of the communication pipe 41, the stop valve 42 is arranged at the lower end of the communication pipe 41, the fins 12 are arranged on the periphery of the communication pipe 41, and the fins 12 on the periphery of the communication pipe 41 are connected with the fins 12 on the outer wall of the box 10, so that the fins 12 on the periphery of the communication pipe 41 can be considered as the extension of the fins 12 on the outer wall of the box 10; in addition, the fin 12 on the communication pipe 41 is disposed between the shutoff valve 42 and the dryer 43, and thus the fin 12 may be in a low temperature state at the middle of the communication pipe 41. When the interior of the box body 10 is in a negative pressure state, the air in the air box 40 enters the inner cavity of the box body 10 through the communicating pipe 41 by opening the stop valve 42; when the air enters the communicating pipe 41, because the temperature of the middle section of the communicating pipe 41 is low, part of the moisture in the air is condensed on the side wall of the middle section of the communicating pipe 41, and then enters the box body 10 through the dryer 43, so that the service life of the dryer 43 can be prolonged.
The top of the drying box is connected with an exhaust pipe 30, the lower end of the exhaust pipe 30 is connected with a blocking block 31 in a threaded manner, the end part of the lower end of the exhaust pipe 30 is provided with a plurality of exhaust ports 32, and when the blocking block 31 is screwed out of the position corresponding to the exhaust pipe 30, the exhaust pipe 30 is communicated with the outside through the exhaust ports 32. The right side wall of the air box 40 is connected with an auxiliary pipe 50, the auxiliary pipe 50 is in a sealing state towards one section of the block 31, and a reciprocating mechanism 60 is arranged in the auxiliary pipe 50. The reciprocating mechanism 60 comprises a sleeve 61 slidably connected with the auxiliary tube 50, and a tension spring 52 is provided to connect with the sleeve 61, and the side walls of the sleeve 61 and the auxiliary tube 50 are provided with a mutually matched spiral groove and spiral rib, i.e. when the sleeve 61 slides relative to the auxiliary tube 50, the sleeve 61 will simultaneously rotate relative to the auxiliary tube 50. The sleeve 61 is provided with a power block 62 rotatably connected with the auxiliary pipe 50, and the power block 62 is rotatably connected with the sleeve 61 through a one-way bearing 63. The air pressure in the air tank 40 is reduced, the sleeve 61 in the auxiliary tube 50 is moved leftward against the elastic force of the tension spring 52, the sleeve 61 and the tension spring 52 constitute a spring vibrator and are vibrated reciprocally, and the sleeve 61 is also rotated reciprocally with respect to the auxiliary tube 50. Since the power block 62 is connected to the sleeve 61 through the one-way bearing 63, the sleeve 61 drives the power block 62 to rotate in one direction and drives the blocking block 31 to rotate, and the blocking block 31 is unscrewed from the lower end of the exhaust pipe 30, so that the box 10 is communicated with the outside through the exhaust pipe 30.
In addition, the power block 62 is connected with the blocking block 31 through a telescopic rod 67, the telescopic rod 67 comprises a first rod and a second rod, one end of the first rod is sleeved at one end of the second rod, and the first rod is connected with the second rod through a spline; thereby make telescopic pole 67 can stretch out and draw back, and the flexible in-process of telescopic pole 67 can drive the sprue 31 rotatory.
The left end of the auxiliary pipe 50 is provided with a first one-way valve 51, the air inlet end of the first one-way valve 51 is communicated with the auxiliary pipe 50, and the air outlet end of the first one-way valve 51 is communicated with the air box 40. The side wall of the auxiliary pipe 50 is provided with a second one-way valve 53, the air inlet end of the second one-way valve 53 is communicated with the outside, and the air outlet end of the second one-way valve 53 is communicated with the auxiliary pipe 50. And the tension spring 52 is in a natural extension and compression state, the sleeve 61 seals the second check valve 53, and the second check valve 53 is in communication with the sleeve 61 when the tension spring 52 is in a tension state.
In addition, the two ends of the auxiliary pipe 50 are connected through a balance pipe 64, a two-position three-way electromagnetic directional valve 65 is arranged on the balance pipe 64, and when the electromagnetic directional valve 65 is in a first switching position, the balance pipe 64 communicates the two ends of the auxiliary pipe 50, so that the two ends of the auxiliary pipe 50 are in the same pressure state; when the electromagnetic directional valve 65 is at the second switching position, the end of the auxiliary pipe 50 facing the block 31 is connected to the outside, and both ends of the auxiliary pipe 50 are disconnected. A contact switch 66 is arranged on the side wall of the left end of the auxiliary pipe 50, and the contact switch 66 is electrically connected with the electromagnetic directional valve 65, so that when the sleeve 61 is in optical contact with the contact switch, the electromagnetic directional valve 65 is switched from the second switching position to the first switching position, and after the electromagnetic directional valve 65 is switched to the first switching position, the electromagnetic directional valve 65 can be reset to the first switching position only by manual reset; the switching of the state of the electromagnetic directional valve 65 is controlled by the controller.
At the moment when the cut-off valve 42 is opened, when the air in the air tank 40 expands into the inner cavity of the box body 10, the auxiliary pipe 50 does not rapidly supply air into the air tank 40; at this time, the electromagnetic directional valve 65 is in the second switching position, the external atmospheric pressure pushes the sleeve 61 to move leftward, and then the electromagnetic directional valve 65 is switched to the first switching position; during the vibration of the subsequent sleeve 61, the second one-way valve 53 will intermittently connect the auxiliary pipe 50 to the outside, so that the interior of the drying box and the interior of the air box 40 are gradually increased to the normal pressure. When the air in the air tank 40 is expanded, the sleeve 61 blocks the auxiliary tube 50 from the outside, so that a large pressure difference is formed between the two sides of the sleeve 61, the amplitude of the reciprocating vibration of the sleeve 61 in the auxiliary tube 50 is large, and the blocking block 31 can be conveniently unscrewed by the power block 62.
In addition, the box body 10 is internally provided with a loading plate 14, and the loading plate 14 is connected with the inner wall of the box body 10 through a spring, so that the spring has a damping effect on the loading plate 14 in the process that air flow rapidly enters the inner cavity of the box body 10.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. Vacuum freeze drying device, including the drying cabinet, be used for to the heating system of drying cabinet heating and be used for the vacuum system to the drying cabinet evacuation, its characterized in that: the drying box comprises a box body and a door body, wherein an opening is formed in one side face of the box body, and the door body can seal the opening; the periphery of the box body is provided with an interlayer, when the door body is opened, the inner cavity and the interlayer of the box body are both communicated with the outside through the opening, when the door body is closed, the inner cavity and the interlayer of the box body are isolated, the inner wall of the box body is provided with a middle one-way valve, the air inlet end of the middle one-way valve is communicated with the interlayer, and the air outlet end of the middle one-way valve is communicated with the inner cavity of the box body; the vacuum system comprises an air extractor, an air extracting main pipe and a plurality of exhaust branch pipes, wherein an air extracting opening of the air extractor is communicated with an inner cavity of the box body through the air extracting main pipe, an air exhaust opening of the air extractor is connected with the exhaust branch pipes, the exhaust branch pipes are uniformly distributed on the outer wall of the box body and fixed with the outer wall of the box body, a plurality of fins are uniformly distributed on the outer wall of the box body, and a heat preservation layer is arranged on the periphery of the box body.
2. The vacuum freeze-drying apparatus according to claim 1, wherein: an air box is arranged below the drying box, the air box is communicated with the inner cavity of the box body through a communicating pipe, and a stop valve is arranged on the communicating pipe; a dryer is arranged at one end of the communicating pipe connected with the drying box; the fin extends to the outer periphery of the communication pipe.
3. The vacuum freeze-drying apparatus according to claim 2, wherein: the top of the drying box is connected with an exhaust pipe, and the end part of the exhaust pipe is in threaded connection with a blocking block; the gas tank is connected with an auxiliary pipe, and a reciprocating mechanism is arranged in the auxiliary pipe; the reciprocating mechanism comprises a sleeve which is in sliding connection with the auxiliary pipe and is provided with a tension spring connected with the sleeve, the side walls of the sleeve and the auxiliary pipe are provided with a spiral groove and a spiral rib which are matched with each other, a power block which is rotationally connected with the auxiliary pipe is arranged in the sleeve, the power block is rotationally connected with the sleeve through a one-way bearing, and the power block is connected with the blocking block through a telescopic rod.
4. The vacuum freeze-drying apparatus according to claim 3, wherein: the telescopic rod comprises a first rod and a second rod, one end of the first rod is sleeved at one end of the second rod, and the first rod is connected with the second rod through a spline.
5. The vacuum freeze-drying apparatus according to claim 4, wherein: the box is internally provided with a carrying plate, and the carrying plate is connected with the inner wall of the box through a spring.
6. The vacuum freeze-drying apparatus according to claim 5, wherein: a first one-way valve is arranged at one end of the auxiliary pipe communicated with the box body, the air inlet end of the first one-way valve is communicated with the auxiliary pipe, and the air outlet end of the first one-way valve is communicated with the air box; a second one-way valve is arranged on the side wall of the auxiliary pipe, the air inlet end of the second one-way valve is communicated with the outside, the air outlet end of the second one-way valve is communicated with the auxiliary pipe, and the sleeve pipe blocks the second one-way valve when the tension spring is in a natural extension and compression state; the auxiliary pipe is sealed towards one end of the blocking block, two ends of the auxiliary pipe are connected through the balance pipe, the balance pipe is provided with an electromagnetic directional valve, when the electromagnetic directional valve is in a first switching position, the balance pipe communicates two ends of the auxiliary pipe, when the electromagnetic directional valve is in a second switching position, one end of the auxiliary pipe towards the blocking block is communicated with the outside, the side wall of the auxiliary pipe is provided with a contact switch located between the sleeve and the air box, the contact switch is electrically connected with the electromagnetic directional valve, and after the sleeve is in optical contact with the contact switch, the electromagnetic directional valve is switched into the first switching position from the second switching position.
7. The vacuum freeze-drying apparatus according to claim 6, wherein: the stop valve is arranged at the joint of the communicating pipe and the air tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437796.2A CN111561810B (en) | 2020-05-21 | 2020-05-21 | Vacuum freeze drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437796.2A CN111561810B (en) | 2020-05-21 | 2020-05-21 | Vacuum freeze drying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111561810A true CN111561810A (en) | 2020-08-21 |
| CN111561810B CN111561810B (en) | 2021-06-15 |
Family
ID=72068173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010437796.2A Active CN111561810B (en) | 2020-05-21 | 2020-05-21 | Vacuum freeze drying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111561810B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526579A (en) * | 2022-01-21 | 2022-05-24 | 上海田枫实业有限公司 | Freeze dryer facilitating dehydration |
| CN116336758A (en) * | 2023-05-29 | 2023-06-27 | 山东裕荷农业科技有限公司 | Freeze-drying device for lotus root tip production |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2036399C1 (en) * | 1992-04-24 | 1995-05-27 | Санкт-Петербургский технологический институт холодильной промышленности | Freeze drying plant |
| CN106482454A (en) * | 2016-10-31 | 2017-03-08 | 天津大学 | A kind of vacuum freeze-drying system and its drying meanss |
| CN108981303A (en) * | 2018-06-21 | 2018-12-11 | 马鞍山松鹤信息科技有限公司 | A kind of vacuum freezing drying oven |
| CN208419383U (en) * | 2018-05-14 | 2019-01-22 | 宿迁市第一人民医院 | A kind of vacuum freeze drier for nano-carrier preparation |
| CN110411156A (en) * | 2019-07-15 | 2019-11-05 | 上海昀望科技发展有限公司 | A kind of vacuum freezing drying device based on intelligent temperature control |
| CN110455041A (en) * | 2019-08-28 | 2019-11-15 | 上海盈达空调设备股份有限公司 | Freeze-drying method based on recuperation of heat and photothermal technique |
-
2020
- 2020-05-21 CN CN202010437796.2A patent/CN111561810B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2036399C1 (en) * | 1992-04-24 | 1995-05-27 | Санкт-Петербургский технологический институт холодильной промышленности | Freeze drying plant |
| CN106482454A (en) * | 2016-10-31 | 2017-03-08 | 天津大学 | A kind of vacuum freeze-drying system and its drying meanss |
| CN208419383U (en) * | 2018-05-14 | 2019-01-22 | 宿迁市第一人民医院 | A kind of vacuum freeze drier for nano-carrier preparation |
| CN108981303A (en) * | 2018-06-21 | 2018-12-11 | 马鞍山松鹤信息科技有限公司 | A kind of vacuum freezing drying oven |
| CN110411156A (en) * | 2019-07-15 | 2019-11-05 | 上海昀望科技发展有限公司 | A kind of vacuum freezing drying device based on intelligent temperature control |
| CN110455041A (en) * | 2019-08-28 | 2019-11-15 | 上海盈达空调设备股份有限公司 | Freeze-drying method based on recuperation of heat and photothermal technique |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526579A (en) * | 2022-01-21 | 2022-05-24 | 上海田枫实业有限公司 | Freeze dryer facilitating dehydration |
| CN116336758A (en) * | 2023-05-29 | 2023-06-27 | 山东裕荷农业科技有限公司 | Freeze-drying device for lotus root tip production |
| CN116336758B (en) * | 2023-05-29 | 2023-12-12 | 山东裕荷农业科技有限公司 | Freeze-drying device for lotus root tip production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111561810B (en) | 2021-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111561810B (en) | Vacuum freeze drying device | |
| CN109458793B (en) | Vacuum freezing coupling waste heat circulation energy-saving dryer | |
| KR101999270B1 (en) | Vacuum freeze drying device and method | |
| WO2012034434A1 (en) | Vacuum heat pump clothes drying method and dryer | |
| US10900713B2 (en) | Low-temperature quick-freezing freeze-drying system | |
| CN205878768U (en) | Popped integration equipment of vacuum freezing drying gas flow | |
| CN104634066B (en) | Multi-functional air conditioner, heat pump drying and dehydrating unit | |
| CN107691629A (en) | A kind of dry ice fruits and vegetables freeze refrigeration system | |
| CN210569543U (en) | Freeze dryer | |
| KR102123354B1 (en) | Vacuum-freeze drying system using heat storage | |
| CN104880035A (en) | Small vacuum freezing dryer with two cold traps | |
| CN115003975B (en) | Vacuum dryer without vacuum pump | |
| KR100315878B1 (en) | Dryer using refrigcrator | |
| CN212431508U (en) | Radix tetrastigme freeze drying equipment | |
| CN210320851U (en) | A freeze-drying device for producing freeze-dried medicinal slices | |
| JP3198291U (en) | Multi-chamber freeze dryer | |
| KR101767251B1 (en) | Vacuum freeze drying apparatus having multi serial cold trap | |
| CN209459309U (en) | A kind of vacuum freeze drier | |
| CN215412782U (en) | Vacuum freeze drier for alternatively defrosting | |
| CN218821075U (en) | Air refrigerating system and vacuum freeze dryer | |
| CN112197517B (en) | Multi-level cold and hot common vacuum freeze-drying system | |
| CN209042904U (en) | A kind of vacuum freeze drier dry storehouse of anti-gas-leak | |
| CN210141748U (en) | Molecular freeze dryer | |
| CN210135728U (en) | Box body cooling system of freeze dryer | |
| KR101696837B1 (en) | Agricultural and marine products lyophilization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |