CN210267901U - Microwave vacuum freeze dryer - Google Patents
Microwave vacuum freeze dryer Download PDFInfo
- Publication number
- CN210267901U CN210267901U CN201920595076.1U CN201920595076U CN210267901U CN 210267901 U CN210267901 U CN 210267901U CN 201920595076 U CN201920595076 U CN 201920595076U CN 210267901 U CN210267901 U CN 210267901U
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- Prior art keywords
- vacuum
- box
- microwave
- freeze dryer
- controller
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- 239000000463 material Substances 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000003989 dielectric material Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 2
- 238000000859 sublimation Methods 0.000 abstract description 10
- 230000008022 sublimation Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004108 freeze drying Methods 0.000 abstract description 4
- RLLPVAHGXHCWKJ-UHFFFAOYSA-N permethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OCC1=CC=CC(OC=2C=CC=CC=2)=C1 RLLPVAHGXHCWKJ-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 238000010438 heat treatment Methods 0.000 description 13
- 241000220259 Raphanus Species 0.000 description 8
- 235000006140 Raphanus sativus var sativus Nutrition 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000009777 vacuum freeze-drying Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Images
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- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses a microwave vacuum freeze dryer, it includes vacuum unit, vacuum tube, desiccator, vacuum detection sensor, temperature sensor and controller, the desiccator includes quick-witted case, microwave resonance box and vacuum chamber, the microwave resonance box sets up at quick-witted incasement, the vacuum chamber sets up in the microwave resonance box, vacuum tube one end is connected with the vacuum chamber, and the other end is connected with the vacuum unit, vacuum detection sensor all sets up in the vacuum chamber with temperature sensor, the controller is connected with vacuum detection sensor, temperature sensor, microwave resonance box and vacuum unit electricity. Adopt the utility model discloses, accelerated the sublimation speed of ice in the material, and need not to consider the vapor that produces after the ice sublimation to pounce on the influence of hydrophone to the production cycle of freeze-drying product has been shortened.
Description
Technical Field
The utility model relates to a vacuum refrigeration equipment technical field especially relates to a microwave vacuum freeze dryer.
Background
Vacuum freeze drying is a drying technology for dehydrating materials by utilizing the sublimation principle, and can maintain the color, the aroma, the nutrient content, the appearance and the shape of the materials to the maximum extent; in addition, the freeze-dried product can be preserved for more than 5 years at normal temperature without preservatives, and the finished product has light weight and is convenient to carry and transport. Traditional vacuum freeze-drying equipment includes vacuum cavity, conduction oil heating device, water catching device and vacuum unit, and conduction oil heating device sets up in the vacuum cavity for the material heats, and the vacuum cavity passes through the pipeline and is connected with water catching device, vacuum unit in proper order. According to the structure, on one hand, the heat transfer rate of a heat transfer oil heating mode is low, on the other hand, the water trap freezes the water vapor which is sublimated from the ice in the material into frost to guarantee the sufficient vacuum degree, but the water trap needs to be stopped for defrosting after working for a period of time to guarantee the water trapping effect, and therefore the production period of freeze-dried products is long.
Disclosure of Invention
The utility model aims to solve the technical problem that a microwave vacuum freeze dryer is provided for the sublimation speed of ice in the material, and need not to consider the influence of the vapor that produces after the ice sublimation to pounce on water ware, thereby shortened the production cycle of freeze-dried product.
In order to solve the technical problem, the utility model provides a microwave vacuum freeze dryer, detect sensor, temperature sensor and controller including vacuum unit, vacuum tube, desiccator, vacuum, the desiccator includes quick-witted case, microwave resonance box and vacuum chamber, the microwave resonance box sets up at quick-witted incasement, the vacuum chamber sets up in the microwave resonance box, vacuum tube one end is connected with the vacuum chamber, and the other end is connected with the vacuum unit, vacuum detects sensor and temperature sensor and all sets up in the vacuum chamber, the controller detects sensor, temperature sensor, microwave resonance box and vacuum unit electricity with the vacuum and is connected.
The microwave resonance box comprises a box body and a microwave generating device, the microwave generating device comprises a magnetron, a waveguide tube, a stirrer, a driving motor and a cooling fan, the box body is hinged with a first closed door, the magnetron is installed on the outer wall of the box body, one end of the waveguide tube is connected with the magnetron, the other end of the waveguide tube is connected with the box body, the stirrer is connected with the box body in a rotating mode and located at the other end of the waveguide tube, the driving motor drives the stirrer to rotate, the cooling fan is installed on the inner wall of the case, and the controller is electrically connected with the driving motor, the magnetron and the cooling fan.
And the box body is of a square structure, and a microwave generating device is arranged on the side wall and/or the top of the box body.
The material of the case, the waveguide, and the stirrer is a metal material having good conductivity.
And the vacuum box is of a cylindrical structure or a square structure, the top of the vacuum box is provided with an air outlet, the air outlet is connected with the vacuum tube, and the vacuum box is hinged with a second sealing door.
And the vacuum box is internally provided with a material rack and material trays, and the material trays are arranged on the material rack from top to bottom in parallel.
And the vacuum box, the material rack and the material tray are made of pressure-resistant medium materials with a microwave shielding effect.
Implement the utility model has the advantages that: the traditional water trap and the traditional heat conducting oil heating device are eliminated, so that the structure is simpler; adopt the microwave heating mode, ice on material surface, middle part and the core can receive the effect of microwave to sublimate simultaneously, shortens production cycle to combine vacuum detection sensor and temperature sensor, make vacuum keep 1 ~ 130pa, heating temperature keeps 40 ~ 80 ℃.
Drawings
Fig. 1 is a front view of a microwave vacuum freeze dryer according to the present invention;
fig. 2 is a main sectional view of a microwave vacuum freeze dryer according to the present invention;
FIG. 3 is a view A-A of FIG. 2;
FIG. 4 is a view B-B of FIG. 2;
fig. 5 is a main sectional view of a microwave resonance box in a microwave vacuum freeze dryer provided by the present invention.
In the figure: 1. a vacuum unit; 2. a vacuum tube; 3. a dryer; 31. a chassis; 32. a microwave resonance box; 321. a box body; 322. a magnetron; 323. a waveguide; 324. a stirrer; 325. A drive motor; 326. a heat radiation fan; 327. a first closure door; 33. a vacuum box; 331. A second closure door; 332. a material rack; 333. a material tray; 4. a vacuum degree detection sensor; 5. A temperature sensor; 6. and a controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-5, the utility model relates to a microwave vacuum freeze dryer, it includes vacuum unit 1, vacuum tube 2, desiccator 3, vacuum detection sensor 4, temperature sensor 5 and controller 6, desiccator 3 includes quick-witted case 31, microwave resonance case 32 and vacuum chamber 33, microwave resonance case 32 sets up in quick-witted case 31, vacuum chamber 33 sets up in microwave resonance case 32, vacuum tube 2 one end is connected with vacuum chamber 33, and the other end is connected with vacuum unit 1, specifically, vacuum unit 1 adopts tertiary roots water ring vacuum unit, and the pumping rate is 600L/s, vacuum detection sensor 4 all sets up in vacuum chamber 33 with temperature sensor 5, and vacuum detection sensor 4 adopts diffusion silicon pressure transmitter, and temperature sensor 5 adopts thermal resistance formula temperature sensor, controller 6 and vacuum detection sensor 4, temperature sensor 4, The temperature sensor 5, the microwave resonance box 32 and the vacuum unit 1 are electrically connected. The controller 6 controls the vacuum unit 1 to vacuumize the vacuum box 33, the controller 6 controls the microwave resonance box 32 to generate microwaves, the microwaves act on the material to heat, ice in the material is directly sublimated into gas, the vacuum degree detection sensor 4 detects the vacuum pressure in the vacuum box 33, the temperature sensor 5 detects the air temperature in the vacuum box 33, an operator presets an air pressure range and a temperature range for the controller 6, if the pressure range is 1-130 pa, the temperature range is 40-80 ℃, when the value detected by the vacuum degree detection sensor 4 is higher than 130pa, the controller 6 controls the microwave resonance box 32 to reduce the heating temperature of the material, so that the rate of sublimation of ice in the material into gas is reduced, thereby reducing the air pressure in the vacuum box 33 and ensuring that the value detected by the temperature sensor 5 is not lower than 40 ℃ in the process of reducing the heating temperature of the material; when the numerical value that the vacuum degree detection sensor 4 detected was less than 1pa, controller 6 control microwave resonance box 32 improved the heating temperature of material for the speed that the ice sublimation in the material was gaseous accelerates, thereby increases the air pressure in the vacuum box 33, and the numerical value that the heating temperature in-process that improves the material that needs to guarantee that temperature sensor 5 detects is not higher than 80 ℃.
Preferably, referring to fig. 2, 4 and 5, the microwave resonance box 32 comprises a box 321 and a microwave generating device, the microwave generating device comprises a magnetron 322, a waveguide 323, a stirrer 324, a driving motor 325 and a heat dissipation fan 326, the box 321 is hinged with a first closing door 327, the magnetron 322 is installed on the outer wall of the box 321, one end of the waveguide 323 is connected with the magnetron 322, the other end is connected with the box 321, the magnetron 322 is electrically connected with a controller 6, the magnetron 322 is electrified to generate microwave with a frequency of 2450MHz, the microwave enters the vacuum box 33 through the waveguide 323 and acts on the material to heat the material, the stirrer 324 is rotatably connected with the box 321 and is positioned at the other end of the waveguide 323, specifically, the stirrer 324 is of a fan type, the driving motor 325 is fixed on the outer wall of the box 321, the driving motor 325 is connected with the stirrer 324, the controller 6 is electrically connected with the driving motor 325, the driving motor 325 drives the stirrer 324 to rotate, the microwaves are reflected to all directions by the stirrer 324 after passing through the rotating stirrer 324, so that the microwaves are uniformly distributed in the box 321, the cooling fan 326 is installed on the inner wall of the cabinet 31, the cooling fan 326 is electrically connected with the controller 6, and the cooling fan 326 is arranged to improve the cooling rate of the magnetron 322.
Preferably, referring to fig. 2 and 3, the box body 321 is a square structure, and the microwave generating devices are mounted on the side walls and the top of the box body 321, and a plurality of microwave generating devices are provided, so that sufficient microwaves can be ensured to heat the material, and the freeze-drying time can be reduced.
Preferably, the box 321, the waveguide 323, and the stirrer 324 are made of a metal material with good conductivity, specifically, the material is stainless steel, and the metal can reflect the microwaves, so that the waveguide 323 can smoothly guide the microwaves into the box 321, and the peripheral wall of the box 321 and the stirrer 324 can reflect the microwaves so that the microwaves are uniformly distributed in the box 321.
Preferably, referring to fig. 2 and 4, the vacuum box 33 is of a square structure, the vacuum box 33 of the square structure can improve space utilization, an air outlet is formed in the top of the vacuum box 33 and connected with the vacuum tube 2, the vacuum box 33 is hinged with a second closing door 331, and the second closing door 331 and the vacuum box 33 cooperate to provide a closed processing environment for the material.
Preferably, referring to fig. 2, a rack 332 and trays 333 are arranged in the vacuum box 33, and 6 trays 333 are placed on the rack 332 from top to bottom in parallel. Specifically, the vacuum box 33, the rack 332 and the tray 333 are made of a pressure-resistant dielectric material having a shielding effect on microwaves, wherein the pressure-resistant dielectric material may be engineering plastic, and the engineering plastic can penetrate the microwaves and hardly absorbs the microwave energy. The material is evenly placed on charging tray 333, and the material can receive the effect of microwave to can heat evenly, and be provided with a plurality of charging trays 333, make the desiccator can once process a large amount of materials, improve the work efficiency of desiccator.
Working process, taking the preparation of diced radishes (specification of diced radishes is 5mm x 5mm) as an example, when the working is started, the diced radishes are put into 6 material trays 333 for quick freezing treatment, then the quick-frozen diced radishes are placed on a material rack 332, then a second sealing door 331 and a first sealing door 327 are closed in sequence, then a controller is started, the controller 6 controls a vacuum unit 1 to vacuumize (the pumping rate of the vacuum unit 1 is 600L/s), a vacuum degree detection sensor 4 detects the air pressure in a vacuum box 33, when the vacuum degree reaches about 100pa, the controller 6 controls a microwave generator to generate microwaves to heat the diced radishes, meanwhile, a temperature sensor 5 detects the temperature in the vacuum box 33 and sends a signal to the controller 6, the controller 6 controls the microwave generator to adjust (adjust the heating temperature, actually, the microwave output power of the magnetron 322 is adjusted, assuming that the working time of the magnetron 322 in one cycle period is T1 and the stopping time is T2, then the cycle period is T1+ T2, and when the controller 6 prolongs the time of T1, the microwave output power is increased, so that the heating temperature is increased, the sublimation rate of ice in the material is increased, and the air pressure in the vacuum box 33 is increased; vice versa) so as to ensure that the vacuum degree in the vacuum box 33 is kept between 100 and 130pa all the time, the heating temperature is kept between 60 and 80 ℃, and thus the quick-frozen diced radish can be completely dried within 5 hours, the water content of the quick-frozen diced radish is reduced to less than 3 percent, and the conventional freeze-drying process needs 40 hours to completely dry the diced radish. Adopt the utility model discloses, accelerated the sublimation speed of ice in the material, and need not to consider the vapor that produces after the ice sublimation to pounce on the influence of hydrophone to the production cycle of freeze-drying product has been shortened.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A microwave vacuum freeze dryer is characterized by comprising a vacuum unit (1), a vacuum tube (2), a dryer (3), a vacuum degree detection sensor (4), a temperature sensor (5) and a controller (6), the dryer (3) comprises a cabinet (31), a microwave resonance box (32) and a vacuum box (33), the microwave resonance box (32) is arranged in the case (31), the vacuum box (33) is arranged in the microwave resonance box (32), one end of the vacuum tube (2) is connected with the vacuum box (33), the other end is connected with the vacuum unit (1), the vacuum degree detection sensor (4) and the temperature sensor (5) are both arranged in the vacuum box (33), the controller (6) is electrically connected with the vacuum degree detection sensor (4), the temperature sensor (5), the microwave resonance box (32) and the vacuum unit (1).
2. The microwave vacuum freeze dryer as claimed in claim 1, wherein the microwave resonance box (32) comprises a box body (321) and a microwave generating device, the microwave generating device comprises a magnetron (322), a waveguide tube (323), a stirrer (324), a driving motor (325) and a heat dissipation fan (326), the box body (321) is hinged with a first closing door (327), the magnetron (322) is installed on the outer wall of the box body (321), one end of the waveguide tube (323) is connected with the magnetron (322) and the other end is connected with the box body (321), the stirrer (324) is rotatably connected with the box body (321) and is located at the other end of the waveguide tube (323), the driving motor (325) drives the stirrer (324) to rotate, the heat dissipation fan (326) is installed on the inner wall of the cabinet (31), and the controller (6) is connected with the driving motor (325), The magnetron (322) and the heat radiation fan (326) are electrically connected.
3. A microwave vacuum freeze dryer according to claim 2, characterized in that the box (321) is of a cuboid structure, and the side walls and/or the top of the box (321) are provided with microwave generating means.
4. A microwave vacuum freeze dryer according to claim 2, characterized in that the material of the box (321), the waveguide (323) and the stirrer (324) is a metallic material with good electrical conductivity.
5. A microwave vacuum freeze dryer according to claim 1, characterized in that the vacuum chamber (33) is of cylindrical or cubic configuration, the vacuum chamber (33) having an air outlet at the top, the air outlet being connected to the vacuum tube (2), the vacuum chamber (33) being hinged to a second closing door (331).
6. A microwave vacuum freeze dryer according to claim 1, characterized in that in the vacuum chamber (33) there are provided a stack (332) and trays (333), several trays (333) being placed parallel from top to bottom on the stack (332).
7. A microwave vacuum freeze dryer according to claim 6, characterized in that the vacuum box (33), the rack (332) and the tray (333) are made of a dielectric material which is resistant to pressure and shields against microwaves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920595076.1U CN210267901U (en) | 2019-04-26 | 2019-04-26 | Microwave vacuum freeze dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920595076.1U CN210267901U (en) | 2019-04-26 | 2019-04-26 | Microwave vacuum freeze dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210267901U true CN210267901U (en) | 2020-04-07 |
Family
ID=70023201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920595076.1U Expired - Fee Related CN210267901U (en) | 2019-04-26 | 2019-04-26 | Microwave vacuum freeze dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210267901U (en) |
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2019
- 2019-04-26 CN CN201920595076.1U patent/CN210267901U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200407 |