CN104807296A - Hot air microwave coupling drying system based on material internal temperature control - Google Patents
Hot air microwave coupling drying system based on material internal temperature control Download PDFInfo
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- CN104807296A CN104807296A CN201510196466.8A CN201510196466A CN104807296A CN 104807296 A CN104807296 A CN 104807296A CN 201510196466 A CN201510196466 A CN 201510196466A CN 104807296 A CN104807296 A CN 104807296A
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Abstract
The invention relates to a hot air microwave coupling drying system, which comprises a modified household microwave oven, a hot air heating device, an electronic scale, a hot air temperature sensor, a fluorescence optical fiber temperature measuring instrument, a computer, control software, a program and a control device, wherein the electronic scale in the system can load real-time weight data of materials into the computer to be recorded and stored, the real-time and on-line measurement of the material weight is realized; the optical fiber temperature sensor arranged in a material tank can load the real-time temperature data inside the materials into the computer to be recorded and stored, and the real-time and on-line measurement of the temperature inside the materials can be realized. The system has the advantages that the materials can be dried in an approximately constant temperature environment, the controllability of the drying process is higher, and the system is suitable for being used for drying various materials.
Description
Technical field
The present invention relates to hot wind and microwave coupling drying system, especially relating to a kind of hot wind and microwave coupling drying system that can carry out dry run control by controlling internal batch temperature, and microwave power continuously adjustabe.
Background technology
In microwave drying process, internal batch and outside are heated simultaneously, change traditional mode of heating from outward appearance to inner essence, greatly can improve the speed of dry materials.Compared to hot blast, the drying mode such as freezing, microwave drying technology has the advantages such as rate of drying is fast, product quality is high, energy resource consumption is low, and the coming year is more extensive in the application of food drying field in recent years.At present, the microwave drying technology of main flow carries out drying by controlling initial microwave power density, but in the dry middle and later periods, due to the decline of example weight, real-time Microwave Power Density will increase, and the uncontrollable temperature of this drying mode, sample interior temperature will be caused too high, have a strong impact on product quality, very easily occur being charred, the phenomenon such as brown stain.Therefore, in dry run, if can be controlled temperature, the advantage of microwave drying both can have been utilized to remove moisture in sample fast, can ensure again dry after the quality of product.
The mode that microwave and hot blast combine generally is divided into dry and dry two kinds of parallel connection of connecting, drying of connecting refer to first by after material heated-air drying to certain moisture content again with microwave drying to terminal, or first carrying out microwave drying re-uses heated-air drying to terminal; In parallel dry, dry also known as coupling, refer to that microwave and hot blast carry out acting on carrying out drying to material simultaneously, in dry run, taken away the steam on material surface by hot blast in time, make material inside and outside keep enough steam pressure poor, while guarantee drying quality, greatly can improve rate of drying.
Summary of the invention
This patent provides a kind of can carry out the dry drying system of hot wind and microwave coupling by controlling internal batch temperature, its microwave power continuously adjustabe, hot blast temperature, wind speed certain limit is adjustable, and topology layout is reasonable, can effectively control dry materials process, ensure dry rear materials quality.For achieving the above object, this patent is by the following technical solutions:
Based on the hot wind and microwave coupling drying system that internal batch temperature controls, it comprises improved household microwave oven, hot air heating apparatus, electronic scale, hot blast temperature sensor, fluorescence fiber temperature measurement instrument, computer, control software design and program and control device.
The household microwave oven of above-mentioned hot wind and microwave coupling drying system by after transforming can power output be 0 ~ 450W, frequency is the microwave of 2450 ± 50MHz, and power continuously adjustabe, the microwave of magnetron evenly injects drying chamber through magnetic field agitation device after waveguide transmission to resonator porch, ensures the uniformity of microwave drying.
The hot air heating apparatus of above-mentioned hot wind and microwave coupling drying system is positioned at micro-wave oven top, the hot blast produced by heat gun by pipeline is constantly input in drying chamber, and the hot blast temperature sensor in pipeline can obtain the hot blast temperature that is input in drying chamber and be passed in computer and carry out temperature control and record is preserved.
The electronic scale device of above-mentioned hot wind and microwave coupling drying system is with RS232 serial ports, the real-time weight of material can be passed in computer and carry out record preservation, and the stage can be detected residing for dry materials, weighing without the need to interrupting the dry material that takes out, avoiding human error.
The fluorescence fiber temperature measurement instrument of above-mentioned hot wind and microwave coupling drying system is made up of fibre-optical probe and optic fiber thermometer, and the temperature data that fibre-optical probe obtains is converted to the voltage of 0-5V through optic fiber thermometer and is input to the Inspect and control carrying out internal batch temperature in computer by control device.
The control device of above-mentioned hot wind and microwave coupling drying system comprises pressure regulator and data collecting card, internal batch temperature and hot blast temperature data can be input to computer by data collecting card analog input interface, control voltage (0-5V) can be input to pressure regulator by data collecting card modulating output interface and then control microwave power and heat gun hot blast temperature.
The control program of above-mentioned hot wind and microwave coupling drying system comprises monitoring panel, microwave control panel and hot blast control panel, wherein monitors panel and can monitor the real-time weight of material and whether dry run completes; Microwave control panel can set microwave drying relevant parameter and monitor internal batch real time temperature; Hot blast control panel can set heat gun relevant parameter and monitor hot blast input temp.
Accompanying drawing explanation
Fig. 1 hot wind and microwave coupling drying system front view controlled based on internal batch temperature of the present invention
In Fig. 1: 1-electronic scale 2-micro-wave oven 3-air outlet 4-optic fiber thermometer 5-computer (containing LabVIEW software) 6-control unit 7-heat gun and hot blast temperature sensor 8-material 9-gripper shoe 10-hot wind inlet 11-fibre-optical probe 12-material pot
Fig. 2 internal batch temperature controlling curve
Fig. 3 hot blast temperature controlling curve
Fig. 4 dry materials curve
Detailed description of the invention
Below in conjunction with accompanying drawing and example, the specific embodiment of the invention is described further.
Hot wind and microwave coupling drying system as shown in Figure 1, material is ready put into material pot 12 after, in the LabVIEW program of computer 5, set microwave and heated-air drying parameter, after setting, can dry run be started.
In dry run, real-time for material weight to be input in computer 5 by RS232 interface and to carry out record and preserve by electronic scale 1, and can detect material and whether arrive dry terminal; The internal batch real time temperature signal that fibre-optical probe 11 obtains becomes the voltage signal of 0-5V after being changed by optic fiber thermometer 4, and be input in computer 5 by the data collecting card of control unit 6, if real-time internal batch temperature value is greater than setting value, computer 5 will export controlling voltage in the pressure regulator of control unit 6 of a 0-5V by the data collecting card of control unit 6, thus it is dry until internal batch temperature value is less than setting value to control micro-wave oven time-out; The hot blast temperature signal of the 0-5V that hot blast temperature sensor 7 obtains is input to through the data collecting card of control unit 6 control carrying out hot blast temperature in computer 5.
Example: the hot wind and microwave coupling based on burdock internal temperature control is dry
The thick disk of 5mm is cut into after fresh burdock (wet basis moisture content 83.5%) is cleaned peeling, taking 50g puts in material pot 12, after closing the fire door of micro-wave oven 2, setting microwave drying parameter in the LabVIEW program in computer 5 is: Microwave Power Density 5W/g, internal batch control temperature 80 DEG C, dry terminal wet basis moisture content 15%; Heated-air drying temperature gets 80 DEG C.After setting, working procedure starts dry run, bolt down procedure after drying completes, and takes out and preserves material.
Above-mentioned example is only and specifically describes embodiments of the present invention, not limits the scope of application of the present invention.Meanwhile, any those skilled in the art all can carry out various changes and improvements for technical scheme of the present invention or embodiment, but all these change or improve the protection domain that must belong to claim of the present invention.
Claims (3)
1., based on the hot wind and microwave coupling drying system that internal batch temperature controls, it comprises improved household microwave oven, hot air heating apparatus, electronic scale, hot blast temperature sensor, fluorescence fiber temperature measurement instrument, computer, control software design and program and control device.
2. according to claim 1, a kind of hot wind and microwave coupling drying system controlled based on internal batch temperature, is characterized in that:
(1) material pot underneath is equipped with electronic scale, and the real-time weight data of material can be passed in computer and carry out recording and preserving by this electronic scale, realizes real-time, the on-line measurement of weight of material;
(2) fibre optic temperature sensor is placed with in material pot, get a sheet material time dry and insert fibre-optical probe, the real time temperature data of internal batch can be passed in computer and carry out recording and preserving by this sensor, realize real-time, the on-line measurement of internal batch temperature;
(3) control software design of computer can after internal batch temperature reaches setting value, stop micro-wave oven work until internal batch temperature drops to below setting value, so repeatedly, ensure that internal batch temperature is stabilized in setting value and fluctuates up and down, until the moisture content of material is dried to equilibrium water conten;
(4) control device is made up of IGCT, data collecting card, for the collection of hot blast temperature and internal batch temperature in the setting of hot blast temperature and microwave power and adjustment and dry run; Data collecting card can export the control voltage of 0-5v, collects the voltage signal (or current signal of 4-20mA) of 0-5v.
3. according to claim 1, a kind of hot wind and microwave coupling drying system controlled based on internal batch temperature, it is characterized in that: internal temperature and the weight data that can obtain material in dry run in real time, and can be controlled dry run by these data; This system can make material dry in close to isoperibol, and dry run controllability is higher, is applicable to various materials dry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510196466.8A CN104807296A (en) | 2015-04-23 | 2015-04-23 | Hot air microwave coupling drying system based on material internal temperature control |
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| CN201510196466.8A CN104807296A (en) | 2015-04-23 | 2015-04-23 | Hot air microwave coupling drying system based on material internal temperature control |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997010A (en) * | 2017-05-25 | 2017-08-01 | 塔里木大学 | A kind of jujube dries dielectric property on-line measuring device |
| CN108050823A (en) * | 2017-12-11 | 2018-05-18 | 界首市金龙机械设备有限公司 | A kind of grain drying machine intelligent temperature control system |
| CN108106384A (en) * | 2017-12-15 | 2018-06-01 | 湖南景远微波科技有限公司 | A kind of continuously adjustable molecular sieve tunnel type micro wave drying device of power |
| CN108151445A (en) * | 2017-12-22 | 2018-06-12 | 湖南景远微波科技有限公司 | The lithium electricity ternary material tunnel type micro wave drying device that a kind of power is continuously adjusted |
| CN109059429A (en) * | 2018-09-15 | 2018-12-21 | 乔燕春 | A kind of semiconductor temperature-control micro vacuum freeze drier |
| CN116026120A (en) * | 2023-03-03 | 2023-04-28 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | Black soldier fly microwave drying device and drying method thereof |
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2015
- 2015-04-23 CN CN201510196466.8A patent/CN104807296A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997010A (en) * | 2017-05-25 | 2017-08-01 | 塔里木大学 | A kind of jujube dries dielectric property on-line measuring device |
| CN108050823A (en) * | 2017-12-11 | 2018-05-18 | 界首市金龙机械设备有限公司 | A kind of grain drying machine intelligent temperature control system |
| CN108106384A (en) * | 2017-12-15 | 2018-06-01 | 湖南景远微波科技有限公司 | A kind of continuously adjustable molecular sieve tunnel type micro wave drying device of power |
| CN108151445A (en) * | 2017-12-22 | 2018-06-12 | 湖南景远微波科技有限公司 | The lithium electricity ternary material tunnel type micro wave drying device that a kind of power is continuously adjusted |
| CN109059429A (en) * | 2018-09-15 | 2018-12-21 | 乔燕春 | A kind of semiconductor temperature-control micro vacuum freeze drier |
| CN116026120A (en) * | 2023-03-03 | 2023-04-28 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | Black soldier fly microwave drying device and drying method thereof |
| CN116026120B (en) * | 2023-03-03 | 2023-09-08 | 中国科学院遗传与发育生物学研究所农业资源研究中心 | Black soldier fly microwave drying device and drying method thereof |
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Application publication date: 20150729 |