WO2022067880A1 - 微波真空干燥装置及其干燥流程 - Google Patents

微波真空干燥装置及其干燥流程 Download PDF

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Publication number
WO2022067880A1
WO2022067880A1 PCT/CN2020/120648 CN2020120648W WO2022067880A1 WO 2022067880 A1 WO2022067880 A1 WO 2022067880A1 CN 2020120648 W CN2020120648 W CN 2020120648W WO 2022067880 A1 WO2022067880 A1 WO 2022067880A1
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Prior art keywords
microwave
vacuum drying
plc
temperature
string
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PCT/CN2020/120648
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English (en)
French (fr)
Inventor
周亚杰
冯鹏
王连安
彭雅娟
陈亮
冯睿轩
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南京中科药业有限公司
中科健康产业集团股份有限公司
中科健康产业集团江苏药业有限公司
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Publication of WO2022067880A1 publication Critical patent/WO2022067880A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/04—Heating arrangements using electric heating
    • 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
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/009—Alarm systems; Safety sytems, e.g. preventing fire and explosions
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • 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

Definitions

  • the invention relates to the technical field of dryers, in particular to a microwave vacuum drying device and a drying process thereof.
  • Vacuum drying also known as analytical drying, is a method of placing materials under vacuum negative pressure to reduce the boiling point of water. To 80 °C, 60 °C, 40 °C began to evaporate.
  • the present invention provides a microwave vacuum drying device and a drying process thereof, which effectively avoid the defects of long vacuum drying cycle and low efficiency that commonly exist in vacuum drying devices in the prior art when vacuum drying materials.
  • the present invention provides a microwave vacuum drying device and a solution for the drying process thereof, as follows:
  • a microwave vacuum drying device comprising:
  • Microwave generator 1 vacuum drying chamber 2, material turntable mechanism, vacuum system and control system;
  • the microwave generator 1 includes a microwave magnetron and a microwave transformer electrically connected to it, and an AC contactor is connected in series between each group of the microwave magnetron and the microwave transformer; An independent protection against short circuit and overload;
  • the vacuum drying chamber 2 is a hollow container, and the microwave generator and the material turntable mechanism are both arranged in the vacuum drying chamber;
  • the material turntable mechanism makes the material make circular motion in the vacuum drying chamber.
  • the material turntable mechanism includes a motor 3 and a cage frame 4; a rotating shaft 5 is penetrated in the center of the cage frame 4, and the rotating shaft 5 is connected with the output end of the motor 3 through a coupling;
  • a holding tray 6 is evenly arranged around the cage frame 4 , and the holding tray 6 is used for holding materials.
  • a baffle plate is provided on the top of the holding tray 6 , and the baffle plate is used to block materials and prevent them from falling off from the holding tray 6 .
  • control system is arranged beside the vacuum drying chamber 2, the control system includes a PLC touch screen, and the vacuum drying chamber 2 is provided with an infrared radiation measuring instrument that is electrically connected to the PLC in the PLC touch screen as an infrared thermometer.
  • Thermometer, the motor 3 and the AC contactor are also electrically connected to the PLC in the PLC touch screen.
  • a sealing door is hinged on the front wall of the vacuum drying chamber 2 , and a handwheel lock is provided on the sealing door 11 .
  • microwave vacuum drying device also includes:
  • the storage tank 9 arranged beside the vacuum drying chamber 2 is connected, and the vacuum gauge 10 electrically connected to the PLC is arranged in the vacuum drying chamber 2 .
  • a drying process of a microwave vacuum drying device comprising:
  • Step 1 Power on, which includes:
  • Unscrew the emergency stop button connected in series between the PLC and the power supply press the start button with a green indicator light between the power supply and the PLC, the touch screen and the infrared thermometer, the green indicator in the start button is on, and let the PLC, touch screen and infrared thermometer are powered, and the touch screen displays the name and manufacturer of the microwave vacuum drying device;
  • Step 2 Enter the main operation interface of the touch screen, and the method for entering the main operation interface of the touch screen includes:
  • the text box marked by the string "program number” is the program number of the drying process currently used;
  • the text box marked by the string "current temperature of the material” is the infrared thermometer.
  • the material temperature can be set as required in the edit box marked by the string "Material temperature setting”;
  • the edit box marked by the string “run time setting” is The time required for microwave heating after the microwave generator is started;
  • the text box marked by the string “running time” is the cumulative time of the microwave generator after it is started;
  • the text box marked by the string "microwave power” is The current actual input power can be connected in series with an electric meter connected to the PLC on the line of the power supply, so that the current actual input power can be collected through the meter and transmitted to the touch screen through the PLC;
  • "temperature hysteresis setting" is the heating process.
  • the button marked by the character string "monitoring switch” is used to press the button to transmit an instruction to the PLC to turn on the monitor.
  • the monitor will automatically Power off; when it needs to be turned on again, press the button marked by the string "monitor switch” to turn on the monitor;
  • the temperature change in the vacuum drying chamber can be visually displayed on the temperature curve screen of the touch screen according to the change of time through the temperature value transmitted by the infrared thermometer. , as shown in Figure 3, where the abscissa of the curve is the time point, and the ordinate is the temperature value.
  • Step 3 parameter setting, the parameter setting includes:
  • Step 4 Manual operation, the manual operation includes:
  • buttons marked by the strings "low pressure switch”, “transmission switch”, “vacuum pump start” and “high pressure switch” on the main control screen in sequence to send commands to the PLC to control the series connection with the microwave magnetron.
  • the AC contactor is turned on to let the microwave magnetron emit microwaves to heat and dry the materials, control the operation of the motor to drive the materials in the holding tray 6 on the cage frame to rotate, and control the operation of the vacuum pump to dry the materials in the vacuum drying chamber. Air extraction to achieve the discharge of moisture from the material and start the operation of inputting high-pressure air after the vacuum pump runs for three minutes;
  • Step 5 When the actual temperature of the material collected by the infrared thermometer and transmitted to the PLC and the touch screen is equal to the temperature set by the material, the PLC will automatically control to disconnect the AC contacts in series with the corresponding groups of microwave magnetrons. to prevent the microwave magnetron from emitting microwaves for heating, so as to realize automatic temperature control;
  • the second pipeline connected with the vacuum drying chamber is also provided with a manual regulating valve, which can float and adjust the vacuum degree in the vacuum drying chamber within the range of -0.08Mpa-0.04Mpa;
  • the motor drive is stopped, the vacuum pump is stopped, or the actual temperature of the material is greater than the set temperature of the material, the PLC controls the AC contactor connected in series with the microwave magnetron to be completely cut off and generate Call the police.
  • Rapid heating microwave heating is different from traditional heating methods, and does not require the process of heat conduction.
  • the heated temperature can be reached in a very short time.
  • the electromagnetic wave can be uniformly penetrated inside and outside the object to generate heat energy. Unlike traditional heating methods, the phenomenon of external coke endogenous will occur.
  • microwave heating has thermal and biological effects, which can sterilize and prevent mildew at a lower temperature.
  • the vacuum state the oxidation and decomposition of organic components in the material are avoided, and the heating speed is fast and the time is short, which can maximize the preservation of the activity of the material and the vitamins, original colors and nutrients in the food.
  • FIG. 1 is a schematic diagram of a screen displayed on a touch screen when the present invention is turned on.
  • FIG. 2 is a schematic diagram of a main control screen of the present invention.
  • FIG. 3 is a schematic diagram of a temperature curve screen of the present invention.
  • FIG. 4 is a schematic diagram of a microwave setting screen of the present invention.
  • FIG. 5 is an internal schematic diagram of the microwave vacuum drying device of the present invention.
  • FIG. 6 is a schematic view of the appearance of the microwave vacuum drying device of the present invention.
  • FIG. 7 is a schematic diagram of the material turntable mechanism of the present invention.
  • Microwaves are electromagnetic waves with frequencies between 300MHz and 300GHz.
  • the water molecules in the heated medium material are polar molecules.
  • the polar orientation of the polar water molecules will change with the change of the external electric field, resulting in the movement of the molecules and mutual friction.
  • the effect is also known as the heating effect.
  • Microwave heating (magnetron frequency is 2450MHz) mainly heats water molecules, so that under the action of microwave alternating electromagnetic field, water molecules cause strong polar oscillation friction, generate heat, and achieve the purpose of drying materials.
  • microwave heating technology is generally applied to media containing moisture.
  • animal and plant raw materials are basically water-containing media, so microwave heating technology is mostly used in food and medicine (especially Chinese herbal medicine) processing industry. Of course, it also has its application in chemical, metallurgical and other industries.
  • microwave heating as a new technology has been highly valued and developed by various disciplines.
  • Microwave vacuum drying device is a new type of microwave energy application equipment that combines microwave energy technology and vacuum technology. It combines a series of advantages of microwave and vacuum drying, and overcomes the shortcomings of long cycle and low efficiency of conventional vacuum drying. In the drying process, it has the advantages of high drying output, good quality and low processing cost. Microwave vacuum drying device is a high-tech product integrating electronics, vacuum, machinery, heat and other disciplines.
  • the microwave vacuum drying device includes:
  • Microwave generator 1, vacuum drying chamber 2, material turntable mechanism, vacuum system and control system, the vacuum drying chamber is made of stainless steel, which can meet the GMP standard of pharmaceutical equipment; the whole microwave vacuum drying device adopts modular design, cleaning, assembly and disassembly , maintenance is very convenient.
  • the microwave generator 1 includes a microwave magnetron and a microwave transformer electrically connected to it, and an AC contactor is connected in series between each group of the microwave magnetron and the microwave transformer; it is characterized by flexible power selection, uniform heating, and operation.
  • the microwave transformer can boost the 220-volt alternating current to 2300-volt high-voltage alternating current, and then rectify the 4600-volt direct current through the capacitor and diode to supply the microwave magnetron.
  • Control tube, magnetron is driven by high-voltage direct current, converts electric energy into frequency into electromagnetic field, effectively heats the items put into drying, and the heating is more uniform and the heating rate is faster; microwave magnetron is produced by Samsung.
  • the microwave transformer adopts oil-immersed water-cooled type, which is easy to maintain and has a low failure rate.
  • the microwave generator is composed of a plurality of independent power supply control circuits, and each of the microwave magnetrons is connected in series with an independent short-circuit and overload protection device such as a fuse, which can work separately according to user needs;
  • the vacuum drying chamber 2 is a rectangular parallelepiped hollow container, and the vacuum drying chamber is made of stainless steel and conforms to the national GMP hygiene standard.
  • the microwave generator and the material turntable mechanism are both arranged in the vacuum drying chamber;
  • the material turntable mechanism is made of polypropylene material, which makes the material move circularly in the vacuum drying chamber to ensure the uniformity of the material in each material tray on it, and to ensure a good microwave drying effect.
  • the material turntable mechanism includes a motor 3 and a cage frame 4; a rotating shaft 5 is penetrated in the center of the cage frame 4, and the rotating shaft 5 is connected with the output end of the motor 3 through a coupling;
  • a holding tray 6 is evenly arranged around the cage frame 4 , and the holding tray 6 is used for holding materials.
  • the top of the holding tray 6 is provided with a baffle, and the baffle is used to block materials to prevent them from falling off from the holding tray 6 .
  • the control system is arranged beside the vacuum drying chamber 2, and the control system includes a PLC touch screen, which adopts foreign advanced touch screen for programmed control.
  • the infrared radiation thermometer that is electrically connected to the PLC as an infrared thermometer, the motor 3 and the AC contactor are also electrically connected to the PLC in the PLC touch screen, and the temperature measurement is accurate and the performance is stable; temperature control points can be set on the PLC touch screen , It can realize automatic temperature adjustment, and can also continuously adjust the vacuum degree to accurately control the quality of the product.
  • the PLC touch screen includes a color touch screen and a programmable controller PLC that are electrically connected to each other.
  • the device adopts the Japanese Fuji color touch screen as the man-machine interface; Japan's Panasonic FPOR series programmable controller (PLC for short) as the control unit; Germany imported infrared thermometer Realize automatic adjustment of system temperature and power.
  • the device adopts PLC control, and the system reliability is fully guaranteed.
  • the production process can be memorized, and the process parameters can be set only once for the same material, which can be produced continuously or at intervals, which is convenient for operators to use and improve production efficiency.
  • Microwave magnetrons can be selected in groups according to power requirements to realize rotating work and prolong service life; it can also automatically start or stop the corresponding group of microwave magnetrons according to material requirements, which is convenient for operation and reduces pollution.
  • Touch screen display The set process parameters, as well as the operation including microwave magnetron start, stop, working status, total power of the device, etc., are all operated on the touch screen, which is convenient, intuitive and reliable.
  • the touch screen not only displays the device status, but also can output high temperature alarm, fault signal and display the corresponding fault picture.
  • PLC can adjust the microwave output power according to the temperature.
  • the automation degree of device control can be improved.
  • the start and stop of each group of microwave magnetrons can be completed on the touch screen, which is convenient and safe.
  • the start and stop of the microwave magnetron is controlled by the output signal of the PLC to control the on-off of the AC contactor to realize group control, which ensures the stable performance of the device, long life and low failure rate.
  • a sealing door is hinged on the front wall of the vacuum drying chamber 2 , and a handwheel lock is provided on the sealing door 11 .
  • the microwave vacuum drying device also includes:
  • the storage tank 9 arranged beside the vacuum drying chamber 2 is connected, and the vacuum gauge 10 electrically connected to the PLC is arranged in the vacuum drying chamber 2 .
  • a drying process of a microwave vacuum drying device comprising:
  • Step 1 Power on, which includes:
  • Step 2 Enter the main operation interface of the touch screen, and the method for entering the main operation interface of the touch screen includes:
  • the text box marked by the string "program number” is the program number of the drying process currently used;
  • the text box marked by the string "current temperature of the material” is the transmission of the infrared thermometer via the PLC
  • the current actual temperature in the vacuum drying chamber is obtained;
  • the material temperature can be set according to the needs in the edit box marked by the string “material temperature setting”;
  • the edit box marked by the string “running time setting” is generated by the microwave The time required for microwave heating after the start of the generator;
  • the text box marked by the string “running time” is the cumulative time of the microwave generator after it is started;
  • the text box marked by the string “microwave power” is the current actual input
  • “temperature return difference setting” is the upper limit of the temperature during the heating process.
  • the button marked by the string “monitoring switch” is used to press the button to transmit an instruction to the PLC to turn on the monitor.
  • the monitor will automatically power off;
  • the temperature change in the vacuum drying chamber can be visually displayed on the temperature curve screen of the touch screen according to the change of time through the temperature value transmitted by the infrared thermometer. , as shown in Figure 3, where the abscissa of the curve is the time point, and the ordinate is the temperature value.
  • Step 3 parameter setting, the parameter setting includes:
  • Step 4 Manual operation, the manual operation includes:
  • buttons marked by the strings “low pressure switch”, “transmission switch”, “vacuum pump start” and “high pressure switch” on the main control screen in sequence to send commands to the PLC to control the series connection with the microwave magnetron.
  • the AC contactor is turned on to let the microwave magnetron emit microwaves to heat and dry the materials, control the operation of the motor to drive the materials in the holding tray 6 on the cage frame to rotate, and control the operation of the vacuum pump to dry the materials in the vacuum drying chamber.
  • the air flow is extracted to discharge the moisture emitted from the material and the operation of opening the input high-pressure air flow after the vacuum pump runs for three minutes; the operation of opening the input high-pressure air flow is mainly through the vacuum drying chamber connected to one end of the high-pressure pipeline, which is connected to the high-pressure pipeline.
  • Step 5 When the actual temperature of the material collected by the infrared thermometer and transmitted to the PLC and the touch screen is equal to the temperature set by the material, the PLC will automatically control to disconnect the AC contacts in series with the corresponding groups of microwave magnetrons. to prevent the microwave magnetron from emitting microwaves for heating, so as to realize automatic temperature control;
  • the purge valve is opened, so that air enters the temperature measurement point of the infrared thermometer, blows off the steam generated by the heating, and allows the infrared temperature measurement infrared emitted by the infrared thermometer to directly aim at the material to measure the temperature.
  • the infrared thermometer can be arranged on the cage frame, and the infrared emission end of the infrared thermometer is facing the material.
  • the purging valve is arranged on the first pipeline that communicates with the vacuum drying chamber. The purging valve is electrically connected to the PLC. One end of the pipeline 1 directly extends to the temperature measurement point of the infrared thermometer. The other end of way one sticks out of the vacuum drying chamber.
  • a manual adjustment valve on the second pipeline connected to the vacuum drying chamber which can adjust the vacuum degree in the vacuum drying chamber floating in the range of -0.08Mpa-0.04Mpa; when adjusting, the vacuum collected by the vacuum meter can be adjusted.
  • the vacuum degree in the drying chamber is transmitted to the touch screen for display via PLC, and the manual regulating valve is adjusted and operated with this reference.
  • the third pipeline connected with the vacuum drying chamber is provided with an air supply valve, which is electrically connected to the PLC, and the third pipeline is provided with a filter screen to ensure that the incoming air is clean.
  • the PLC controls the AC contactor connected in series with the microwave magnetron to be completely cut off and an alarm is generated; the The signal of the alarm can be that the alarm screen will be automatically displayed on the touch screen.
  • a proximity switch that is electrically connected to the PL can be installed on the airtight door. If the airtight door is not firmly closed, the proximity switch will not be turned on. If the airtight door is firmly closed, the proximity switch will be turned on, so that It can be judged whether the airtight door is closed by the signal of conduction or not transmitted to the PLC by the proximity switch.

Abstract

一种微波真空干燥装置及其干燥流程，该干燥装置包括微波发生器（1）、真空干燥腔（2）、物料转盘机构、真空系统及控制系统；微波发生器（1）包括微波磁控管及与之电连接的微波变压器，每个微波磁控管与微波变压器之间串联着交流接触器；每个微波磁控管均串联有一个独立的防止短路和过载的保护装置；真空干燥腔（2）为中空容器，微波发生器和物料转盘机构均设置在真空干燥腔（2）中；物料转盘机构使物料在真空干燥腔（2）内做圆周运动；该干燥流程包括开机、进入触摸屏的主操作界面，参数设置以及手动操作四个步骤。

Description

微波真空干燥装置及其干燥流程 技术领域
本发明涉及干燥机技术领域，具体涉及一种微波真空干燥装置及其干燥流程。
背景技术
真空干燥，又名解析干燥，是一种将物料置于真空负压条件下，使水的沸点降低，水在一个大气压下的沸点是100℃，在真空负压条件下可使水的沸点降到80℃，60℃，40℃开始蒸发。
但是在现有的真空干燥装置中，对物料进行真空干燥时，普遍存在真空干燥周期长、效率低的缺点。
发明内容
为解决上述问题，本发明提供了一种微波真空干燥装置及其干燥流程，有效避免了现有技术中真空干燥装置中对物料进行真空干燥时普遍存在真空干燥周期长、效率低的缺陷。
为了克服现有技术中的不足，本发明提供了一种微波真空干燥装置及其干燥流程的解决方案，具体如下：
一种微波真空干燥装置，包括：
微波发生器1、真空干燥腔2、物料转盘机构、真空系统及控制系统；
所述微波发生器1包括微波磁控管及与之电连接的微波变压器，每组所述微波磁控管与微波变压器之间串联着交流接触器；每个所述微波磁控管均串联有一个独立的防止短路和过载保护装置；
所述真空干燥腔2为中空容器，所述微波发生器和物料转盘机构均设置 在所述真空干燥腔中；
所述物料转盘机构使物料在真空干燥腔内做圆周运动。
进一步的，所述物料转盘机构包括电机3和笼式框架4；在所述笼式框架4的中央透设着转轴5，所述转轴5与电机3的输出端通过联轴器连接；
环绕在所述笼式框架4上均匀设置有盛放盘6，所述盛放盘6用于盛放物料。
进一步的，所述盛放盘6的顶部设有挡板，所述挡板用于阻挡物料防止从所述盛放盘6内脱落。
进一步的，所述控制系统设置在真空干燥腔2旁，所述控制系统包括PLC触摸屏，所述真空干燥腔2内设置有与PLC触摸屏中的PLC电连接的作为红外测温仪的红外辐射测温仪，所述电机3与交流接触器也与PLC触摸屏中的PLC电连接。
进一步的，所述真空干燥腔2的前壁上铰接有密封门，所述密封门11上设有手轮锁。
进一步的，所述微波真空干燥装置，还包括：
与PLC电连接的真空泵7和真空管道8，所述真空管道8上设置有真空泵7，所述真空管道8的一端与所述真空干燥腔2内连通，所述真空管道8的另一端与在所述真空干燥腔2旁设置的贮槽9相接，与PLC电连接的真空表10设置在所述真空干燥腔2中。
一种微波真空干燥装置的干燥流程，包括：
步骤1：开机，所述开机包括：
将物料送入真空干燥腔内，物料必须平铺均匀，确认无误后关好密闭门；
旋开串联在PLC和供电电源之间的急停按钮，按压带有绿色指示灯的设置在供电电源同PLC、触摸屏与红外测温仪之间的启动按钮，启动按钮内绿色指示灯亮，并让PLC、触摸屏与红外测温仪得电，触摸屏上显示标示微波真空干燥装置的名称和生产厂家；
步骤2：进入触摸屏的主操作界面，所述进入触摸屏的主操作界面的方法，包括：
在触摸屏任意位置点按可翻到主控画面；
进一步的，在所述主控画面中，由字符串“程序号”标示的文本框中为当前所用干燥流程的程序编号；由字符串“物料当前温度”标示的文本框中为红外测温仪经由PLC传输来的真空干燥腔内当前实际温度；由字符串“物料温度设定”标示的编辑框中可根据需要设定物料温度；由字符串“运行时间设定”标示的编辑框中为由微波发生器启动后的微波加热所需的时间；由字符串“运行时间”标示的文本框中为微波发生器启动后其工作运行累计时间；由字符串“微波功率”标示的文本框为当前实际投入功率，可以通过在供电电源的线路上串联上与PLC电连接的电表，这样就能把当前实际投入功率通过电表采集并经由PLC传输至触摸屏；“温度回差设定”为加热过程中温度上限与设定温度的幅差范围；由字符串“监视开关”标示的按钮用于按压该按钮来传输指令给PLC来打开监视器，当监视时长到预先设定时间时，监视器自动断电；再需打开时，按下由字符串“监视开关”标示的按钮即可打开监视器；
另外，在PLC控制导通交流接触器让微波发生器工作过程中，所述真空干燥腔内温度的变化可通过红外测温仪传输来的温度值按照时间的变化在触 摸屏的温度曲线画面直观显示，如图3所示，其中曲线的横坐标为时间点，纵坐标为温度值。
步骤3：参数设置，所述参数设置包括：
进入主控画面后，先在主控画面上设定物料的温度，按下由字符串“物料温度设定”标示的编辑框中需输数据的位置，画面弹出一个数字输入键盘，此时，在数字键盘上输入要设置的温度值，点击数字键盘上的由字符串“ENT”标示的确认键即可将输入的参数输送到PLC内部，数字键盘上的由字符串“CLR”标示的确认键可清除输入的数据，数字键盘上的由字符串“ESC”标示的取消键可取消输入数据；主控画面上其他可设置参数以与之相同方式操作；参数设置完毕后，请点击由字符串“程序保存”标示的按钮，在弹出的小键盘上输入要保存的程序编号，点击数字键盘上的由字符串“ENT”标示的按键，再点击触摸屏右下方的保存按钮，即可将输入的参数输送到PLC内部保存，待下次开机后，可点击由字符串“程序调用”标示的按钮，然后在弹出的包含有程序号的界面上选择合适的程序号，将保存在PLC内部的对应该程序号的程序调用出来应用；
步骤4：手动操作，所述手动操作包括：
依序按下主控画面上由字符串“低压开关”、“传动开关”、“真空泵启”和“高压开关”分别标示的按钮，就能分别发送指令到PLC来控制与微波磁控管串联的交流接触器导通来让该微波磁控管发出微波来加热干燥物料、控制电机运行来带动所述笼式框架上的盛放盘6内的物料旋转、控制真空泵运行来把真空干燥腔内的气流抽出以达到把物料中散发出水份排出以及在真空泵运行三分钟后开启输入高压气流的运作；
而按由字符串“微波设定”标示的按钮后可进入微波设定界面；在微波设定界面可以点击由字符串“第一组”、“第二组”……标示的按钮来选择与该字符串对应的各组微波磁控管能被启动，也就是在按下主控画面上由字符串“低压开关”标示的按钮后，PLC随后就让与所述对应的各组微波磁控管串联的交流接触器导通，以此让所述对应的各组微波磁控管发出微波来加热。
步骤5：当红外测温仪采集到并传递到PLC和触摸屏中的物料实际温度等于物料设定的温度时，PLC就自动控制断开与所述对应的各组微波磁控管串联的交流接触器，以此阻止微波磁控管发出微波来加热，以此实现自动控温；
进一步的，当在微波真空干燥装置的干燥流程中需要观察准确物料实际温度，可在主控画面中按下由字符串“吹扫阀启”标示的按钮，这就就能发出指令到PLC中让PLC控制吹扫阀打开，由此则在红外测温仪的测温点进入空气，吹开加热产生的蒸汽，让红外测温仪发出的测温红外线直接对准物料来测温。
进一步的，与真空干燥腔连通的管路二上还设置有手动调节阀，可将真空干燥腔内的真空度在-0.08Mpa-0.04Mpa范围内浮动调节；
当所述微波真空干燥装置的干燥流程结束后，在主控画面上点击由字符串“返回”标示的按钮后，就能发送指令来让PLC关掉真空泵，之后按下由字符串“补气阀启”标示的按钮后，让洁净的空气进入真空干燥腔内，使腔内外大气压相平衡，这时才能打开真空干燥腔的密闭门，取出物料，工作结束。
进一步的，当包括密闭门未关好、电机传动停止、真空泵停止或者物料 实际温度＞物料设定温度时的意外情况出现时，所述PLC控制微波磁控管串联的交流接触器全断并产生报警。
本发明的有益效果为：
1.加热迅速：微波加热与传统加热方式不同，不需要热传导的过程。可以在极短的时间内达到加热的温度。
2.加热均匀：无论物件的各部位形状如何，能使物件表里同时均匀渗透电磁波(微波)而产生热能。不像传统加热方式，会产生外焦内生的现象。
3.节能高效：由于含有水分的物质容易吸收微波而发热，因此，除少量的传输损耗外，几乎无其它损耗。故热效率高、节能。它比远红外线加热节能三分之一以上。
4.防霉、杀菌、保鲜：微波加热具有热力和生物效应，能在较低的温度下灭菌和防霉。由于在真空状态下，避免了物料中有机成分的氧化和分解，并且加热速度快、时间短，能最大限度地保存物料的活性和食品中的维生素、原有的色泽和营养成分。
5.易控制：只要控制微波功率即可实现立即加热和终止。
6.安全无害：由于微波是控制在金属制成的容器内和波导管中工作，有效地防止了微波泄露。没有放射线危害及有害气体的排放，不产生余热和粉尘污染，即不污染食物也不污染环境。
另外还有效避免了现有技术中真空干燥装置中对物料进行真空干燥时普遍存在真空干燥周期长、效率低的缺陷。
附图说明
图1是本发明开机时触摸屏上显示画面的示意图。
图2是本发明的主控画面的示意图。
图3是本发明的温度曲线画面的示意图。
图4是本发明的微波设定画面的示意图。
图5是本发明的微波真空干燥装置的内部示意图。
图6是本发明的微波真空干燥装置的外观示意图。
图7是本发明的物料转盘机构的示意图。
具体实施方式
微波是频率在300MHz到300GHz的电磁波。被加热的介质物料中的水分子是极性分子，极性水分子在快速变化的高频电磁场的作用下，其极性取向将随着外电场的变化而变化，造成分子的运动和相互摩擦效应也就是所谓的加热效应。微波加热(磁控管的频率为2450MHz)主要是加热水分子，使水分子在微波交变电磁场的作用下，引起强烈的极性振荡摩擦，产生热量，达到干燥物料的目的。这一过程并对生物体产生作用，导致电容性细胞膜结构破裂，或者细胞分子之间氢键松弛等破坏，使得细菌的最基本单元---细胞的生存环境遭到严重破坏以至死亡，从而达到灭菌的目的。于是，微波加热技术一般应用于含水分的介质。而动植物原料基本上都是含水分的介质，所以，微波加热技术多应用于食品与医药(特别是中草药)加工业。当然，在化工、冶金等行业也有它的应用。现在，微波加热作为一项新技术已受到各学科领域的高度重视和应用开发。
微波真空干燥装置是微波能技术与真空技术相结合的一种新型微波能应用设备，它兼备了微波与真空干燥的一系列优点，克服了常规真空干燥周期长、效率低的缺点，在一般物料的干燥过程中，具有干燥产量高、品质好、 加工成本低等优点。微波真空干燥装置是一项集电子、真空、机械、热力等学科为一体的高新技术产品。
下面将结合附图和实施例对本发明做进一步地说明。
如图1-图7所示，微波真空干燥装置，包括：
微波发生器1、真空干燥腔2、物料转盘机构、真空系统及控制系统，真空干燥腔采用不锈钢制造，能符合制药设备的GMP标准；微波真空干燥装置整机采用模块化设计，清洗、装拆、检修均很方便。
所述微波发生器1包括微波磁控管及与之电连接的微波变压器，每组所述微波磁控管与微波变压器之间串联着交流接触器；其特点是功率选择灵活、加热均匀、操作简便；微波变压器、电容、二极管和微波磁控管相互电性连接，微波变压器可将220伏的交流电升压为2300伏的高压交流电，再通过电容和二极管整流为4600伏的直流电供应给微波磁控管，磁控管在高压直流电的驱动下，将电能转化为频率为电磁场，有效地把放入烘干的物品加热，且加热更均匀，加热速率更快；微波磁控管为三星公司生产，性能稳定，使用寿命长；微波变压器采用油浸水冷式，维护容易且故障率低。微波发生器由多个独立供电的控制电路组成，每个所述微波磁控管均串联有一个独立的如保险丝这样的防止短路和过载保护装置，可根据用户需要分别工作；
所述真空干燥腔2为长方体状中空容器，真空干燥腔是由不锈钢加工而成，符合国家GMP卫生标准。所述微波发生器和物料转盘机构均设置在所述真空干燥腔中；
所述物料转盘机构是由聚丙烯材料加工而成，使物料在真空干燥腔内做圆周运动，保证其上每个盛料盘中物料的均匀性，保证有良好的微波干燥效 果。
所述物料转盘机构包括电机3和笼式框架4；在所述笼式框架4的中央透设着转轴5，所述转轴5与电机3的输出端通过联轴器连接；
环绕在所述笼式框架4上均匀设置有盛放盘6，所述盛放盘6用于盛放物料。
所述盛放盘6的顶部设有挡板，所述挡板用于阻挡物料防止从所述盛放盘6内脱落。
所述控制系统设置在真空干燥腔2旁，所述控制系统包括PLC触摸屏，该PLC触摸屏采用国外先进的触摸屏进行程序化控制，所述真空干燥腔2内测温配备设置有与PLC触摸屏中的PLC电连接的作为红外测温仪的红外辐射测温仪，所述电机3与交流接触器也与PLC触摸屏中的PLC电连接，其测温准确，性能稳定；PLC触摸屏上可设置温度控制点，可实现温度自动调节，也可连续调节真空度，精确控制产品的质量。
PLC触摸屏包括相互电连接的彩色触摸屏与可编程控制器PLC，本装置采用日本富士彩色触摸屏作为人机界面；日本松下FPOR系列可编程控制器(简称PLC)作为控制单元；德国进口红外测温仪实现系统温度和功率的自动调节。本装置采用PLC控制，系统可靠性得到充分保证。对生产工艺可记忆，对同种物料只需一次设定工艺参数，即可连续或间隔生产，方便操作人员使用提高生产效率。微波磁控管可根据功率要求分组选择，实现轮换工作，延长使用寿命；也可根据物料的要求，自动启动或停止相应组的微波磁控管，方便操作，减少污染。
触摸屏显示：设定的各个工艺参数，还可操作包括微波磁控管启、停、 工作状态、装置的总功率等均在触摸屏上操作完成，方便直观可靠。触摸屏不仅显示装置状态，还可以输出高温报警、故障信号和显示相应的故障画面。PLC可以根据温度的高低来调节微波输出功率的大小。使装置控制的自动化程度得以提高。每一组微波磁控管的启动、停止都可以在触摸屏上来完成，方便安全。微波磁控管的启动、停止通过PLC的输出信号控制交流接触器的通断来实现分组控制，保证装置性能稳定，寿命长，故障率低。
所述真空干燥腔2的前壁上铰接有密封门，所述密封门11上设有手轮锁。
所述微波真空干燥装置，还包括：
与PLC电连接的真空泵7和真空管道8，所述真空管道8上设置有真空泵7，所述真空管道8的一端与所述真空干燥腔2内连通，所述真空管道8的另一端与在所述真空干燥腔2旁设置的贮槽9相接，与PLC电连接的真空表10设置在所述真空干燥腔2中。
一种微波真空干燥装置的干燥流程，包括：
步骤1：开机，所述开机包括：
将物料(在每个盛放盘上盛放物料最多不超过5kg/盘)送入真空干燥腔内，物料必须平铺均匀，确认无误后关好密闭门；
合上供电电源，旋开串联在PLC和供电电源之间的急停按钮，按压带有绿色指示灯的设置在供电电源同PLC、触摸屏与红外测温仪之间的启动按钮，启动按钮内绿色指示灯亮，并让PLC、触摸屏与红外测温仪得电，触摸屏上显示标示微波真空干燥装置的名称和生产厂家，示例可如图1所示；
步骤2：进入触摸屏的主操作界面，所述进入触摸屏的主操作界面的方法，包括：
在触摸屏任意位置点按可翻到如图2所示的主控画面；
在所述主控画面中，由字符串“程序号”标示的文本框中为当前所用干燥流程的程序编号；由字符串“物料当前温度”标示的文本框中为红外测温仪经由PLC传输来的真空干燥腔内当前实际温度；由字符串“物料温度设定”标示的编辑框中可根据需要设定物料温度；由字符串“运行时间设定”标示的编辑框中为由微波发生器启动后的微波加热所需的时间；由字符串“运行时间”标示的文本框中为微波发生器启动后其工作运行累计时间；由字符串“微波功率”标示的文本框为当前实际投入功率，可以通过在供电电源的线路上串联上与PLC电连接的电表，这样就能把当前实际投入功率通过电表采集并经由PLC传输至触摸屏；“温度回差设定”为加热过程中温度上限与设定温度的幅差范围；由字符串“监视开关”标示的按钮用于按压该按钮来传输指令给PLC来打开监视器，当监视时长到预先设定时间时，监视器自动断电；再需打开时，按下由字符串“监视开关”标示的按钮即可打开监视器；
另外，在PLC控制导通交流接触器让微波发生器工作过程中，所述真空干燥腔内温度的变化可通过红外测温仪传输来的温度值按照时间的变化在触摸屏的温度曲线画面直观显示，如图3所示，其中曲线的横坐标为时间点，纵坐标为温度值。
步骤3：参数设置，所述参数设置包括：
进入主控画面后，先在主控画面上设定物料的温度，按下由字符串“物料温度设定”标示的编辑框中需输数据的位置，画面弹出一个数字输入键盘，此时，在数字键盘上输入要设置的温度值，点击数字键盘上的由字符串“ENT”标示的确认键即可将输入的参数输送到PLC内部，数字键盘上的由字符串 “CLR”标示的确认键可清除输入的数据，数字键盘上的由字符串“ESC”标示的取消键可取消输入数据；主控画面上其他可设置参数以与之相同方式操作；参数设置完毕后，请点击由字符串“程序保存”标示的按钮，在弹出的小键盘上输入要保存的程序编号，点击数字键盘上的由字符串“ENT”标示的按键，再点击触摸屏右下方的保存按钮，即可将输入的参数输送到PLC内部保存，待下次开机后(如遇到同样的物料时)，可点击由字符串“程序调用”标示的按钮，然后在弹出的包含有程序号的界面上选择合适的程序号，将保存在PLC内部的对应该程序号的程序调用出来应用；
步骤4：手动操作，所述手动操作包括：
依序按下主控画面上由字符串“低压开关”、“传动开关”、“真空泵启”和“高压开关”分别标示的按钮，就能分别发送指令到PLC来控制与微波磁控管串联的交流接触器导通来让该微波磁控管发出微波来加热干燥物料、控制电机运行来带动所述笼式框架上的盛放盘6内的物料旋转、控制真空泵运行来把真空干燥腔内的气流抽出以达到把物料中散发出水份排出以及在真空泵运行三分钟后开启输入高压气流的运作；开启输入高压气流的运作主要是通过真空干燥腔上连通有高压管道的一端，该高压管道上带有与PLC电连接的电磁阀，该高压管道的另一端还与储存有高压氮气的氮气罐连通，这样在PLC的控制下就能开通或关闭电磁阀来分别让高压气流送入真空干燥腔或者阻止高压气流流入真空干燥箱。
而按由字符串“微波设定”标示的按钮后可进入如图4所示的微波设定界面；在微波设定界面可以点击由字符串“第一组”、“第二组”……标示的按钮来选择与该字符串对应的各组微波磁控管能被启动，也就是在按下主 控画面上由字符串“低压开关”标示的按钮后，PLC随后就让与所述对应的各组微波磁控管串联的交流接触器导通，以此让所述对应的各组微波磁控管发出微波来加热。
步骤5：当红外测温仪采集到并传递到PLC和触摸屏中的物料实际温度等于物料设定的温度时，PLC就自动控制断开与所述对应的各组微波磁控管串联的交流接触器，以此阻止微波磁控管发出微波来加热，以此实现自动控温；
当在微波真空干燥装置的干燥流程中需要观察准确物料实际温度，可在主控画面中按下由字符串“吹扫阀启”标示的按钮，这就就能发出指令到PLC中让PLC控制吹扫阀打开，由此则在红外测温仪的测温点进入空气，吹开加热产生的蒸汽，让红外测温仪发出的测温红外线直接对准物料来测温。所述红外测温仪可设置在笼式框架上，所述红外测温仪的红外线发射端正对着物料。所述吹扫阀设置在与真空干燥腔连通的管路一上，所述吹扫阀与PLC电连接，该管路一的一端直接伸入到红外测温仪的测温点旁，该管路一的另一端伸出真空干燥腔之外。
与真空干燥腔连通的管路二上还设置有手动调节阀，可将真空干燥腔内的真空度在-0.08Mpa-0.04Mpa范围内浮动调节；具体调节时，可以由真空表采集到的真空干燥腔内的真空度经由PLC传输到触摸屏上显示，以此参考来调整操纵手动调节阀。
当所述微波真空干燥装置的干燥流程结束后，在主控画面上点击由字符串“返回”标示的按钮后，就能发送指令来让PLC关掉真空泵，之后按下由字符串“补气阀启”标示的按钮后，让洁净的空气进入真空干燥腔内，使腔内外大气压相平衡，这时才能打开真空干燥腔的密闭门，取出物料，工作结 束。与真空干燥腔连通的管路三上设置有补气阀，该补气阀与PLC电连接，所述管路三内设有过滤网，用来保证送入的空气是洁净的。
当包括密闭门未关好、电机传动停止、真空泵停止或者物料实际温度＞物料设定温度时的意外情况出现时，所述PLC控制微波磁控管串联的交流接触器全断并产生报警；该报警的信号可以是会在触摸屏上自动显示报警画面。密闭门未关好，可以在密闭门上设置有与PL电连接的接近开关，如果密闭门未关牢，接近开关就不会导通，如果密闭门关牢，接近开关就会导通，这样就能通过接近开关传输到PLC中的导通与否的信号来判断密闭门是否关牢。
以上已用实施例说明的方式对本发明作了描述，本领域的技术人员应当理解，本公开不限于以上描述的实施例，在不偏离本发明的范围的情况下，可以做出各种变化、改变和替换。

Claims (10)

  1. 一种微波真空干燥装置，其特征在于，包括：
    微波发生器、真空干燥腔、物料转盘机构、真空系统及控制系统；
    所述微波发生器包括微波磁控管及与之电连接的微波变压器，每组所述微波磁控管与微波变压器之间串联着交流接触器；每个所述微波磁控管均串联有一个独立的防止短路和过载保护装置；
    所述真空干燥腔为中空容器，所述微波发生器和物料转盘机构均设置在所述真空干燥腔中；
    所述物料转盘机构使物料在真空干燥腔内做圆周运动。
  2. 根据权利要求1所述的微波真空干燥装置，其特征在于，所述物料转盘机构包括电机和笼式框架；在所述笼式框架的中央透设着转轴，所述转轴与电机的输出端通过联轴器连接；
    环绕在所述笼式框架上均匀设置有盛放盘，所述盛放盘用于盛放物料。
  3. 根据权利要求2所述的微波真空干燥装置，其特征在于，所述盛放盘的顶部设有挡板，所述挡板用于阻挡物料防止从所述盛放盘内脱落。
  4. 根据权利要求1所述的微波真空干燥装置，其特征在于，所述控制系统设置在真空干燥腔旁，所述控制系统包括PLC触摸屏，所述真空干燥腔内设置有与PLC触摸屏中的PLC电连接的作为红外测温仪的红外辐射测温仪，所述电机与交流接触器也与PLC触摸屏中的PLC电连接。
  5. 根据权利要求1所述的微波真空干燥装置，其特征在于，所述真空干燥腔的前壁上铰接有密封门，所述密封门上设有手轮锁。
  6. 根据权利要求1所述的微波真空干燥装置，其特征在于，所述微波真空干燥装置，还包括：
    与PLC电连接的真空泵和真空管道，所述真空管道上设置有真空泵，所述真空管道的一端与所述真空干燥腔内连通，所述真空管道的另一端与在所述真空干燥腔旁设置的贮槽相接，与PLC电连接的真空表设置在所述真空干燥腔中。
  7. 一种微波真空干燥装置的干燥流程，其特征在于，包括：
    步骤1：开机，所述开机包括：
    将物料送入真空干燥腔内，物料必须平铺均匀，确认无误后关好密闭门；
    旋开串联在PLC和供电电源之间的急停按钮，按压带有绿色指示灯的设置在供电电源同PLC、触摸屏与红外测温仪之间的启动按钮，启动按钮内绿色指示灯亮，并让PLC、触摸屏与红外测温仪得电，触摸屏上显示标示微波真空干燥装置的名称和生产厂家；
    步骤2：进入触摸屏的主操作界面，所述进入触摸屏的主操作界面的方法，包括：
    在触摸屏任意位置点按可翻到主控画面；
    步骤3：参数设置，所述参数设置包括：
    进入主控画面后，先在主控画面上设定物料的温度，按下由字符串“物料温度设定”标示的编辑框中需输数据的位置，画面弹出一个数字输入键盘，此时，在数字键盘上输入要设置的温度值，点击数字键盘上的由字符串“ENT”标示的确认键即可将输入的参数输送到PLC内部，数字键盘上的由字符串“CLR”标示的确认键可清除输入的数据，数字键盘上的由字符串“ESC”标示的取消键可取消输入数据；主控画面上其他可设置参数以与之相同方式操作；参数设置完毕后，请点击由字符串“程序保存”标示的按钮，在弹出的小键盘上输入要保存的程序编号，点击数字键盘上的由字符串“ENT”标示的 按键，再点击触摸屏右下方的保存按钮，即可将输入的参数输送到PLC内部保存，待下次开机后，可点击由字符串“程序调用”标示的按钮，然后在弹出的包含有程序号的界面上选择合适的程序号，将保存在PLC内部的对应该程序号的程序调用出来应用；
    步骤4：手动操作，所述手动操作包括：
    依序按下主控画面上由字符串“低压开关”、“传动开关”、“真空泵启”和“高压开关”分别标示的按钮，就能分别发送指令到PLC来控制与微波磁控管串联的交流接触器导通来让该微波磁控管发出微波来加热干燥物料、控制电机运行来带动所述笼式框架上的盛放盘6内的物料旋转、控制真空泵运行来把真空干燥腔内的气流抽出以达到把物料中散发出水份排出以及在真空泵运行三分钟后开启输入高压气流的运作；
    而按由字符串“微波设定”标示的按钮后可进入微波设定界面；在微波设定界面可以点击由字符串“第一组”、“第二组”……标示的按钮来选择与该字符串对应的各组微波磁控管能被启动，也就是在按下主控画面上由字符串“低压开关”标示的按钮后，PLC随后就让与所述对应的各组微波磁控管串联的交流接触器导通，以此让所述对应的各组微波磁控管发出微波来加热。
    步骤5：当红外测温仪采集到并传递到PLC和触摸屏中的物料实际温度等于物料设定的温度时，PLC就自动控制断开与所述对应的各组微波磁控管串联的交流接触器，以此阻止微波磁控管发出微波来加热，以此实现自动控温。
  8. 根据权利要求7所述的微波真空干燥装置的干燥流程，其特征在于，当在微波真空干燥装置的干燥流程中需要观察准确物料实际温度，可在主控画面中按下由字符串“吹扫阀启”标示的按钮，这就就能发出指令到PLC中 让PLC控制吹扫阀打开，由此则在红外测温仪的测温点进入空气，吹开加热产生的蒸汽，让红外测温仪发出的测温红外线直接对准物料来测温。
  9. 根据权利要求7所述的微波真空干燥装置的干燥流程，其特征在于，与真空干燥腔连通的管路二上还设置有手动调节阀，可将真空干燥腔内的真空度在-0.08Mpa-0.04Mpa范围内浮动调节；
    当所述微波真空干燥装置的干燥流程结束后，在主控画面上点击由字符串“返回”标示的按钮后，就能发送指令来让PLC关掉真空泵，之后按下由字符串“补气阀启”标示的按钮后，让洁净的空气进入真空干燥腔内，使腔内外大气压相平衡，这时才能打开真空干燥腔的密闭门，取出物料，工作结束。
  10. 根据权利要求7所述的微波真空干燥装置的干燥流程，其特征在于，当包括密闭门未关好、电机传动停止、真空泵停止或者物料实际温度＞物料设定温度时的意外情况出现时，所述PLC控制微波磁控管串联的交流接触器全断并产生报警；
    在所述主控画面中，由字符串“程序号”标示的文本框中为当前所用干燥流程的程序编号；由字符串“物料当前温度”标示的文本框中为红外测温仪经由PLC传输来的真空干燥腔内当前实际温度；由字符串“物料温度设定”标示的编辑框中可根据需要设定物料温度；由字符串“运行时间设定”标示的编辑框中为由微波发生器启动后的微波加热所需的时间；由字符串“运行时间”标示的文本框中为微波发生器启动后其工作运行累计时间；由字符串“微波功率”标示的文本框为当前实际投入功率，可以通过在供电电源的线路上串联上与PLC电连接的电表，这样就能把当前实际投入功率通过电表采集并经由PLC传输至触摸屏；“温度回差设定”为加热过程中温度上限与设 定温度的幅差范围；由字符串“监视开关”标示的按钮用于按压该按钮来传输指令给PLC来打开监视器，当监视时长到预先设定时间时，监视器自动断电；再需打开时，按下由字符串“监视开关”标示的按钮即可打开监视器；
    另外，在PLC控制导通交流接触器让微波发生器工作过程中，所述真空干燥腔内温度的变化可通过红外测温仪传输来的温度值按照时间的变化在触摸屏的温度曲线画面直观显示，如图3所示，其中曲线的横坐标为时间点，纵坐标为温度值。
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