CN114485077B - Ultrasonic-assisted freeze drying equipment - Google Patents
Ultrasonic-assisted freeze drying equipment Download PDFInfo
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- CN114485077B CN114485077B CN202210167524.4A CN202210167524A CN114485077B CN 114485077 B CN114485077 B CN 114485077B CN 202210167524 A CN202210167524 A CN 202210167524A CN 114485077 B CN114485077 B CN 114485077B
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- ultrasonic
- temperature control
- control plate
- vacuum tank
- vacuum
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- 238000004108 freeze drying Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000005057 refrigeration Methods 0.000 claims abstract description 16
- 239000004065 semiconductor Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims description 9
- 238000007710 freezing Methods 0.000 claims description 7
- 230000008014 freezing Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 244000000626 Daucus carota Species 0.000 description 1
- 235000002767 Daucus carota Nutrition 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012792 lyophilization process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- 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
-
- 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
- F26B5/02—Drying solid materials or objects by processes not involving the application of heat by using ultrasonic vibrations
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses ultrasonic-assisted freeze drying equipment, which belongs to the field of freeze drying and comprises the following components: the vacuum tank is fixedly provided with a temperature control plate for bearing materials therein; the vacuum pump is connected with the vacuum tank through a pipeline, and a vacuum valve and a pressure detection device are also arranged on the pipeline; the ultrasonic vibrators are fixedly arranged in the vacuum tank and uniformly distributed around the center circumference of the temperature control plate; the ultrasonic generator is electrically connected with each ultrasonic vibrator through a lead; the semiconductor refrigeration module is fixedly arranged at the bottom of the vacuum tank and is connected with the temperature control plate; and the infrared thermometer is fixedly arranged in the vacuum tank and is used for detecting the temperature of the temperature control plate and the materials carried by the temperature control plate. The invention has simple structure and reasonable design, is convenient for ultrasonic intervention, and can accurately measure the temperature, thereby improving the freeze-drying effect.
Description
Technical Field
The invention relates to the technical field of freeze drying, in particular to ultrasonic-assisted freeze drying equipment.
Background
The freeze-drying technology is a technology of freezing fresh food and medicine raw materials and then reducing the surface pressure to enable moisture in the raw materials to be sublimated into gas directly, and the moisture is gasified directly without being melted in the process, so that the collapse of tissues is avoided, the tissues can be kept in a form before freeze-drying, and the freeze-dried materials have good quality. In addition, because the drying temperature is lower, active ingredients in the material are reserved, and the quality of the product can be improved to the greatest extent.
However, freeze-drying techniques also have drawbacks, such as the time-consuming lyophilization process and high production costs. In the prior art, there is a technical solution of applying ultrasonic waves during the freezing process to save the freeze-drying time, for example, a freeze-drying method and a matched device disclosed in document 1 (CN 201410201099.1) mention that the carrot is freeze-dried with the assistance of ultrasonic waves. However, the matched equipment provided by the ultrasonic interventional instrument requires additional manpower input during ultrasonic intervention, so that the use is inconvenient; in addition, when the thermocouple detects the temperature, the temperature of the material at the contact position can be detected, and the use of the thermocouple can cause uneven distribution of a temperature field, so that the temperature monitoring of the slice surface is not accurate enough, and the freeze drying effect is affected.
Disclosure of Invention
Aiming at the problems that ultrasonic intervention is inconvenient and temperature monitoring is not accurate enough in the prior art, the invention aims to provide ultrasonic-assisted freeze drying equipment.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
an ultrasound-assisted freeze drying apparatus comprising:
the vacuum tank is internally and fixedly provided with a temperature control plate for bearing materials;
The vacuum pump is connected with the vacuum tank through a pipeline, and a vacuum valve and a pressure detection device are also arranged on the pipeline;
the ultrasonic vibrators are fixedly arranged in the vacuum tank and uniformly distributed around the center circumference of the temperature control plate;
the ultrasonic generator is electrically connected with each ultrasonic vibrator through a wire;
the semiconductor refrigeration module is fixedly arranged at the bottom of the vacuum tank and is connected with the temperature control plate;
And the infrared thermometer is fixedly arranged in the vacuum tank and is used for detecting the temperature of the temperature control plate and the materials carried by the temperature control plate.
Preferably, an opening matched with the temperature control plate is formed in the bottom of the vacuum tank, and the temperature control plate is fixedly installed in the opening.
Preferably, the temperature control plate is of a rigid plate-shaped structure made of heat conducting materials, the semiconductor refrigeration module is fixedly arranged on one side of the bottom surface of the temperature control plate, and an insulation layer is laid on one side of the bottom surface of the temperature control plate.
Preferably, the temperature control plate is a stainless steel plate.
Preferably, the ultrasonic vibrator is fixedly installed on one side of the top surface of the temperature control plate.
Preferably, the vacuum tank comprises a tank body and a cover detachably and fixedly connected to the top of the tank body, and heat insulation layers are respectively laid on the outer side walls of the tank body and the cover.
Preferably, the infrared thermometer is located right above the center of the temperature control plate.
Preferably, the infrared thermometer is fixedly connected with the vacuum tank through a supporting conduit, and a cable connected with the infrared thermometer is arranged in the supporting conduit in a penetrating manner.
By adopting the technical scheme, the invention has the beneficial effects that:
1. Through the vacuum tank connected with the vacuum pump, the temperature control plate is fixedly arranged in the vacuum tank, and the ultrasonic vibrator is fixedly arranged on the temperature control plate, the ultrasonic wave can be applied to the materials carried on the temperature control plate through the ultrasonic vibrator only by connecting the ultrasonic generator when the temperature control plate is used, so that the operation steps are greatly simplified, and the efficiency is improved;
2. Through the setting of infrared thermoscope for temperature measurement to temperature control board and loaded material is passive, non-contact, has not only avoided the adverse effect to the temperature field in the temperature measurement process, still makes temperature monitoring scope wider, more accurate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
fig. 4 is a cross-sectional view taken along line A-A in fig. 3.
In the figure, a 1-vacuum tank, a 2-cover, a 3-temperature control plate, a 4-vacuum pump, a 5-vacuum valve, a 6-pressure detection device, a 7-ultrasonic vibrator, an 8-semiconductor refrigeration module, a 9-infrared thermometer, a 10-heat preservation layer, a 11-pipeline and a 12-support conduit are arranged.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
It should be noted that, in the description of the present invention, the positional or positional relation indicated by the terms such as "upper", "lower", "left", "right", "front", "rear", etc. are merely for convenience of describing the present invention based on the description of the structure of the present invention shown in the drawings, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first" and "second" in this technical solution are merely references to the same or similar structures, or corresponding structures that perform similar functions, and are not an arrangement of the importance of these structures, nor are they ordered, or are they of a comparative size, or other meaning.
In addition, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two structures. It will be apparent to those skilled in the art that the specific meaning of the terms described above in this application may be understood in the light of the general inventive concept in connection with the present application.
Example 1
An ultrasonic auxiliary freeze drying device, as shown in figures 1-4, comprises a vacuum tank 1, a cover 2, a temperature control plate 3, a vacuum pump 4, a vacuum valve 5, a pressure detection device 6, an ultrasonic vibrator 7, a semiconductor refrigeration module 8, an infrared thermometer 9 and an insulation layer 10.
The vacuum tank 1 is integrally in a cylindrical structure, and the vacuum tank 1 specifically comprises a tank body and a cover 2 which is detachably and fixedly connected to the top of the tank body, namely, the top of the tank body is opened, and the tank body is closed through the cover 2. Correspondingly, the outer side walls of the tank body and the cover 2 are respectively provided with an insulating layer made of insulating materials. Wherein, the inside of the vacuum tank 1 is fixedly provided with a temperature control plate 3 for bearing materials. In this embodiment, an opening adapted to the temperature control plate 3 is specifically formed at the bottom of the tank, and the temperature control plate 3 is fixedly installed in the opening. The temperature control plate 3 is preferably a rigid plate structure made of a heat conductive material, such as a stainless steel plate, and is preferably circular.
The vacuum pump 4 is arranged outside the vacuum tank 1, the suction end of which is connected to the tank side wall of the vacuum tank 1 via a pipe 11, and on which pipe 11 a vacuum valve 5 and a pressure detection device 6 are also mounted, wherein the pressure detection device 6 is preferably configured as a pressure gauge or in other embodiments also as a digital display pressure gauge. The vacuum pump 4 is used for vacuumizing the vacuum tank 1, so that the vacuum degree inside the vacuum tank 1 is maintained, the vacuum valve 5 is used for conveniently and flexibly controlling vacuumizing, and the pressure detection device 6 is used for accurately observing the vacuum degree inside the vacuum tank 1.
The ultrasonic transducers 7 are arranged in plural, for example, four, and all the ultrasonic transducers 7 are fixedly mounted in the vacuum tank 1. In addition, the plurality of timeout wave vibrators are uniformly arranged around the center circumference of the temperature control plate 3. In this embodiment, each ultrasonic vibrator 7 is fixedly installed at the peripheral edge of the temperature control plate 3, so as to better apply ultrasonic waves to the material carried on the temperature control plate 3.
An ultrasonic generator (not shown) is disposed outside the vacuum tank 1, and the ultrasonic generator is electrically connected to each ultrasonic vibrator 7 through a wire, so as to control the ultrasonic vibrator 7 to emit ultrasonic waves with a suitable frequency.
The semiconductor refrigeration module 8 is fixedly arranged at the bottom of the vacuum tank 1, and the semiconductor refrigeration module 8 is connected with the temperature control plate 3, so that cold and heat are released to the temperature control plate 3, and the purpose of controlling the temperature of the temperature control plate 3 is achieved. In this embodiment, the semiconductor refrigeration module 8 is fixedly installed on the bottom surface side of the temperature control plate 3, and an insulation layer 10, such as an insulation layer 10 made of polyurethane foam material, is additionally applied on the bottom surface side of the temperature control plate 3. The semiconductor refrigeration module 8 operates by receiving a current and switches a refrigeration mode and a heating mode according to a change in a current direction.
The infrared thermometer 9 is fixedly installed in the vacuum tank 1, and the infrared thermometer 9 is used for detecting the temperature of the temperature control plate 3 and the materials carried by the temperature control plate. In this embodiment, the infrared thermometer 9 is disposed at a position right above the center of the temperature control plate 3, for example, the infrared thermometer 9 is fixedly connected with the side wall of the vacuum tank 1 through the support pipe 12, and the support pipe 12 penetrates the side wall of the vacuum tank 1, while the support pipe 12 is penetrated with a cable for connecting with the infrared thermometer 9.
When the device is used, the material to be freeze-dried is directly placed on the top surface of the temperature control plate 3 through the opening of the cover 2, then the cover 2 is closed, the temperature control plate 3 is cooled through the semiconductor refrigeration module 8, so that moisture in the material is frozen into the material for crystallization, the ultrasonic vibrator 7 can be controlled to work at preset intervals and for a preset time period through the ultrasonic generator in the freezing stage, ultrasonic waves are used for promoting the material to form ice crystals among cells, and meanwhile, the heat conductivity coefficient and the heat transfer effect can be improved through the ultrasonic waves; after freezing, primary drying is carried out, the vacuum tank 1 is vacuumized through the vacuum pump 4, after the required vacuum degree is achieved, the ultrasonic vibrator 7 is controlled to work at higher power at preset intervals and for a long time, the main function of the ultrasonic wave at the stage is to improve the heat transfer effect, and meanwhile, energy is provided to enable water molecules to acquire the sublimated kinetic energy, so that the primary drying speed is increased; after the primary drying is finished, the temperature of the temperature control plate 3 is increased through the semiconductor refrigeration module 8, namely, secondary drying is carried out, and likewise, the ultrasonic vibrator 7 is controlled at preset intervals and time length, the heat transfer effect is improved through the ultrasonic wave at the stage, and energy is provided at the same time, so that the crystal water overflows.
It will be appreciated that the above process only discloses one of the modes of operation of the apparatus, and the application is not limited to the specific manner of use of the apparatus disclosed herein, and one skilled in the art can adjust the mode of operation according to the actual material to be freeze-dried, for example, the mode disclosed in document 1, which requires only ultrasonic intervention during the freezing stage.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, and yet fall within the scope of the invention.
Claims (8)
1. An ultrasonic-assisted freeze-drying device, characterized in that: the device comprises a vacuum tank, a vacuum pump, an ultrasonic vibrator, an ultrasonic generator, a semiconductor refrigeration module and an infrared thermometer: a temperature control plate for bearing materials is fixedly arranged in the vacuum tank; the vacuum pump is connected with the vacuum tank through a pipeline, and a vacuum valve and a pressure detection device are also arranged on the pipeline; the ultrasonic vibrators are fixedly arranged in the vacuum tank, and the overtime vibrators are uniformly distributed around the center circumference of the temperature control plate; the ultrasonic generator is electrically connected with each ultrasonic vibrator through a wire; the semiconductor refrigeration module is fixedly arranged at the bottom of the vacuum tank and is connected with the temperature control plate; the infrared thermometer is fixedly arranged in the vacuum tank and is used for detecting the temperature of the temperature control plate and the materials carried by the temperature control plate;
The semiconductor refrigeration module is used for cooling the temperature control plate when the ultrasonic auxiliary freeze-drying equipment works so as to crystallize moisture which is frozen into the material carried on the temperature control plate, the ultrasonic generator is used for controlling the ultrasonic vibrator to work at preset intervals and time length in the freezing stage, and ultrasonic waves are used for promoting the material to form ice crystals among cells so as to improve the heat conductivity coefficient and the heat transfer effect; the primary drying is carried out after the freezing is finished, the vacuum tank is vacuumized through the vacuum pump, after the required vacuum degree is achieved, the ultrasonic vibrator is controlled to work at higher power at preset intervals and for a long time, and at the stage, the ultrasonic waves are used for improving the heat transfer effect and simultaneously providing energy so as to enable water molecules to acquire the sublimated kinetic energy, so that the primary drying speed is increased; after primary drying is finished, the temperature of the temperature control plate is raised through the semiconductor refrigerating module, namely secondary drying is carried out, the ultrasonic vibrator is controlled at preset intervals and time length, and the ultrasonic wave is used for improving the heat transfer effect and providing energy at the stage so as to enable crystal water in the material to overflow.
2. The ultrasonic-assisted freeze drying apparatus of claim 1, wherein: the bottom of the vacuum tank is provided with an opening matched with the temperature control plate, and the temperature control plate is fixedly arranged in the opening.
3. The ultrasonic-assisted freeze drying apparatus of claim 2, wherein: the temperature control plate is of a rigid plate-shaped structure made of heat conducting materials, the semiconductor refrigeration module is fixedly arranged on one side of the bottom surface of the temperature control plate, and an insulating layer is laid on one side of the bottom surface of the temperature control plate.
4. An ultrasound-assisted freeze drying apparatus according to claim 3 characterised in that: the temperature control plate is a stainless steel plate.
5. The ultrasonic-assisted freeze drying apparatus of claim 1, wherein: the ultrasonic vibrator is fixedly arranged on one side of the top surface of the temperature control plate.
6. The ultrasonic-assisted freeze drying apparatus of claim 1, wherein: the vacuum tank comprises a tank body and a cover which is detachably and fixedly connected to the top of the tank body, and heat insulation layers are laid on the outer side walls of the tank body and the cover.
7. The ultrasonic-assisted freeze drying apparatus of claim 1, wherein: the infrared thermometer is positioned right above the center of the temperature control plate.
8. The ultrasonic-assisted freeze drying apparatus of claim 7, wherein: the infrared thermometer is fixedly connected with the vacuum tank through a supporting conduit, and a cable connected with the infrared thermometer is arranged in the supporting conduit in a penetrating manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210167524.4A CN114485077B (en) | 2022-02-23 | 2022-02-23 | Ultrasonic-assisted freeze drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210167524.4A CN114485077B (en) | 2022-02-23 | 2022-02-23 | Ultrasonic-assisted freeze drying equipment |
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| CN114485077A CN114485077A (en) | 2022-05-13 |
| CN114485077B true CN114485077B (en) | 2024-06-25 |
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| CN202210167524.4A Active CN114485077B (en) | 2022-02-23 | 2022-02-23 | Ultrasonic-assisted freeze drying equipment |
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| CN115500420A (en) * | 2022-09-22 | 2022-12-23 | 福建拓天生物科技有限公司 | Processing technology of freeze-dried coffee product |
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| CN114485077A (en) | 2022-05-13 |
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