CN103217997A

CN103217997A - Microwave baking oven and application thereof

Info

Publication number: CN103217997A
Application number: CN2013101043743A
Authority: CN
Inventors: 陆绮荣; 唐奇林; 孙旋; 罗建辉; 祝捷
Original assignee: Guilin University of Technology
Current assignee: Guilin University of Technology
Priority date: 2013-03-28
Filing date: 2013-03-28
Publication date: 2013-07-24

Abstract

The invention discloses a microwave baking oven and the application of the microwave baking oven. The microwave baking oven comprises a microwave system, a constant-temperature blast system, a dehumidification system, a temperature monitoring system, a humidity monitoring system, a gas monitoring system and a control system, wherein the control system is realized based on LabVIEW. The microwave baking oven disclosed by the invention comprehensively utilizes the characteristics of high microwave high-temperature drying efficiency and uniform temperature distribution of a baking oven, and has the characteristics of high thermal treatment efficiency, uniform temperature distribution, intelligent identification of thermal treatment degree of products, high automation degree and the like; furthermore, based on the support of the LabVIEW, a user can realize data real-time acquisition, processing and display and can carry out quick and exact control on a thermal treatment process only on an operation interface. The microwave baking oven disclosed by the invention is applied to thermal treatment fields of laboratories, foods, chemical industry and chemical fiber industrial production.

Description

A kind of microwave oven and application

Technical field

The present invention relates to industrial control fields such as microwave technology, air blast constant temperature technology, temperature and humidity monitor and gas-monitoring, particularly a kind of microwave oven and application.

Background technology

The performance of material not merely depends on the kind and the composition of material, changes the institutional framework of material internal or the reaction between acceleransstoff by thermal treatment, will improve material property significantly; At present, heat treatment technics is weak in a China's engineering link, is in marginalisation and attachedization always, has a strong impact on the competitive power that China manufactures industry; Current on many industrial production lines heat treatment step still adopt single microwave or baking oven heat treatment mode, because microwave equipment internal electromagnetic field uniformity is undesirable, baking oven heat treatment cycle under the uniform temperature condition is long, causes product thermal treatment quality and efficient low.

Summary of the invention

The objective of the invention is at the existing deficiency of existing annealing device, the characteristics that comprehensive utilization microwave high-temperature drying efficiency is high and oven temperature is evenly distributed provide a kind of annealing device---microwave oven and application.

The present invention is achieved in that a kind of microwave oven, comprises microwave system, constant temperature blower system, dehumidification system, temperature monitoring system, humidity control system, gas monitoring system and control system.

Described microwave system is made of magnetron, waveguide, high-voltage capacitor, high-tension transformer, high-voltage diode, protective tube, rotary tray motor, fan electromotor and temperature control system, adopts traditional microwave device assembles technology to carry out system assembles; Behind program start, collection, demonstration and control temperature that system's meeting is real-time, when the temperature in the furnace chamber was below or above the default temperature, system will control number, magnetron continuous working or the gap work that magnetron is opened, and makes the temperature in the furnace chamber reach controlled purpose.

Described constant temperature blower system mainly is made up of electric heater, temperature control system, blower fan, wind convection circulation air channel, wind inlet channel, air-out air channel and outlet size adjustment device; Behind program start, collection, demonstration and control temperature that system can be real-time, when the temperature in the furnace chamber was below or above the default temperature, the temperature control system control heater is heating or gap heating continuously, makes the temperature in the furnace chamber reach controlled purpose; The effect of air blast blower fan is the horizontal convection circulation of air that makes in the furnace chamber, air is blown on the electric heater delivers to the operating room after the heating, blown on the electrothermal tube by operating room's suction blower fan then again and heat, the continuous hydronic while also makes the temperature in the furnace chamber more even.

Described dehumidification system mainly comprises exhaust blower and airduct, and its major function is that the water vapor that will produce in the microwave thermal processing procedure is discharged outside the furnace chamber; By selecting and arranging exhaust blower and airduct, can shorten duct length and flexibility, reduce the airduct resistance.

Described temperature monitoring system mainly is made up of IRTP-300L infrared temperature sensor, NI PCI-6259 data collecting card, computing machine and LabVIEW parts, be used for real-time collection, demonstration and control system temperature, when the temperature in the furnace chamber is below or above the default temperature, system will control number, magnetron continuous working or the gap work that magnetron is opened, and makes the temperature in the furnace chamber reach controlled purpose.

Described humidity control system mainly is made up of HS1101 capacitance type humidity sensor, NI PCI-6259 data collecting card, computing machine and LabVIEW parts, is used for real-time collection and display system humidity.

Described gas monitoring system mainly detects transmitter, NI PCI-6259 data collecting card, computing machine and LabVIEW parts by KQ500 series stationary gas to be formed, and being used for real-time monitoring identification and demonstration is working bin environmental gas concentration.

Described control system is used to realize that based on labVIEW human-computer interaction function, the automatic hydrofuge of temperature detection and temperature control function, Humidity Detection and system and program handoff functionality, gas concentration detect and Automatic Program start and stop function; The fuzzy controller based on LabVIEW of PID and Fuzzy Logic Toolkit design that utilizes LabVIEW to carry is used for the temperature variation of heat treatment process is carried out real-time s operation control.

Described microwave thermal treatment temperature, air blast constant temperature heat treatment temperature require to set according to the product heat treatment process parameter.

Described dehumidification system starts humidity, program is switched humidity and required to set according to the product heat treatment process parameter.

Described gas is shut down concentration and is required to set according to the product heat treatment process parameter.

Microwave oven of the present invention is judged the heat treated degree of product by product produces gas in heat treatment process concentration.

Microwave oven of the present invention is applied to laboratory, food, chemical industry and chemical fibre industry production thermal treatment field.

The present invention has the following advantages:

(1) annealing device of the present invention possesses characteristics such as automaticity height, heat treatment efficiency height, uniformity of temperature profile, product heat treatment degree Intelligent Recognition.

(2) annealing device of the present invention is under the support of LabVIEW, and the user only needs just can realize real time data acquisition, processing and demonstration at operation interface, and heat treatment process is controlled fast, accurately.

(3) the present invention selects for use KQ500 series stationary gas to detect transmitter, can discern multiple gases, and the thermal treatment field of application is more extensive.

Description of drawings

Fig. 1 is a syndeton synoptic diagram of the present invention.

Fig. 2 is the system program operational flow diagram of the embodiment of the invention.

Fig. 3 is the software interface figure of the embodiment of the invention based on LabVIEW.

Embodiment

Embodiment:

Present embodiment is applied to chemical products thermal treatment.

A kind of microwave oven comprises microwave system, constant temperature blower system, dehumidification system, temperature monitoring system, humidity control system, gas monitoring system and control system.

Described microwave system is made of magnetron, waveguide, high-voltage capacitor, high-tension transformer, high-voltage diode, protective tube, rotary tray motor, fan electromotor and temperature control system, adopts traditional microwave device assembles technology to carry out system assembles; Behind program start, collection, demonstration and control temperature that system can be real-time, when the temperature in the furnace chamber was lower than 50 ℃, the number that system will control the magnetron unlatching increased, and made the temperature in the furnace chamber reach 50 ℃.

Described constant temperature blower system mainly is made up of electric heater, temperature control system, blower fan, wind convection circulation air channel, wind inlet channel, air-out air channel and outlet size adjustment device; Behind program start, collection, demonstration and control temperature that system can be real-time, when the temperature in the furnace chamber was lower than 50 ℃, the temperature control system control heater generated heat continuously, made the temperature in the furnace chamber reach 50 ℃; The effect of air blast blower fan is the horizontal convection circulation of air that makes in the furnace chamber, air is blown on the electric heater delivers to the operating room after the heating, blown on the electrothermal tube by operating room's suction blower fan then again and heat, the continuous hydronic while also makes the temperature in the furnace chamber more even.

Described dehumidification system parts mainly comprise exhaust blower and airduct, and its major function is that the water vapor that will produce in the microwave thermal processing procedure is discharged outside the furnace chamber.

Described temperature monitoring system mainly is made up of IRTP-300L infrared temperature sensor, NI PCI-6259 data collecting card, computing machine and LabVIEW parts, be used for real-time collection, demonstration and control system temperature, when the temperature in the furnace chamber is lower than 50 ℃, system will control the magnetron continuous working, makes the temperature in the furnace chamber reach 50 ℃.

The gas shutdown concentration of setting present embodiment is 10ppm; Wet stock advances furnace chamber, at first starts microwave thermal handling procedure oven dry wet stock; Start dehumidification system when the ambient humidity in the furnace chamber is higher than 40%RH, water vapor is got rid of by dehumidification system; When the ambient humidity in the furnace chamber was lower than 8%RH, Automatic Program switched to constant temperature air blast condition of heat treatment; After operation a period of time, when the concentration of gas in the furnace chamber reached 10ppm, finished by thermal treatment in constant temperature air blast condition of heat treatment for material, and system is out of service automatically.

Present embodiment possesses characteristics such as heat treatment efficiency height, uniformity of temperature profile, product heat treatment degree Intelligent Recognition, automaticity height, is expected to reduce significantly this product heat treatment period and improves temperature homogeneity, improve production efficiency and product quality.

Claims

1. A microwave oven, characterized in that the microwave oven comprises a microwave system, a constant temperature blast system, a dehumidification system, a temperature monitoring system, a humidity monitoring system, a gas monitoring system and a control system;

The microwave system is composed of a magnetron, a waveguide, a high-voltage capacitor, a high-voltage transformer, a high-voltage diode, a fuse, a turntable motor, a fan motor, and a temperature control system. The traditional microwave equipment assembly process is used for system assembly; when the program starts, The system will collect, display and control the temperature in real time. When the temperature in the furnace cavity is lower or higher than the set temperature of the system, the system will control the number of magnetrons to be turned on, and the magnetrons will work continuously or intermittently;

The constant temperature blowing system is mainly composed of an electric heater, a temperature control system, a fan, a wind convection circulation duct, an air inlet duct, an air outlet duct and an outlet size adjustment device; when the program is started, the system will collect real-time , display and control temperature, when the temperature in the furnace chamber is lower or higher than the system set temperature, the temperature control system controls the heater to heat continuously or intermittently; the function of the blower fan is to make the air in the furnace chamber horizontal convection cycle , so that the air is blown to the electric heater for heating and then sent to the working room, and then the working room sucks in the fan and then blows it to the electric heating tube for heating, which makes the temperature in the furnace cavity more uniform while continuously circulating heating;

The dehumidification system mainly includes an exhaust fan and an air pipe, and its main function is to discharge the water vapor generated in the microwave heat treatment process out of the furnace chamber; by selecting and arranging the exhaust fan and air pipe, the length and curvature of the pipe can be shortened, reducing Duct resistance;

The temperature monitoring system is mainly composed of IRTP-300L infrared temperature sensor, NI PCI-6259 data acquisition card, computer and LabVIEW components, used for real-time acquisition, display and control system temperature, when the temperature in the furnace cavity is lower than or higher than When the temperature is set in the system, the system will control the number of magnetrons to be turned on, and the magnetrons will work continuously or intermittently;

The humidity monitoring system is mainly composed of HS1101 capacitive humidity sensor, NI PCI-6259 data acquisition card, computer and LabVIEW components, for real-time collection and display system humidity;

The gas monitoring system is mainly composed of KQ500 series fixed gas detection transmitter, NI PCI-6259 data acquisition card, computer and LabVIEW components, which are used for real-time monitoring, identification and display of ambient gas concentration in the working warehouse;

The control system is based on labVIEW, which is used to realize human-computer interaction function, temperature detection and temperature control function, humidity detection and system automatic dehumidification and program switching function, gas concentration detection and program automatic start and stop function; use the PID that comes with LabVIEW and Fuzzy Logic Toolkit designed a fuzzy controller based on LabVIEW, which is used for real-time operation control of temperature changes in the heat treatment process;

The microwave heat treatment temperature and blast constant temperature heat treatment temperature are set according to the product heat treatment process parameter requirements;

The start-up humidity and program switching humidity of the dehumidification system are set according to the product heat treatment process parameters;

The gas shutdown concentration is set according to the product heat treatment process parameter requirements.

2. The microwave oven according to claim 1, characterized in that the microwave oven judges the degree of heat treatment of the product by the concentration of gas generated during the heat treatment of the product.

3. The application of the microwave oven according to claim 1 or 2, characterized in that the microwave oven is used in the field of laboratory, food, chemical and chemical fiber industrial production heat treatment.