Automatic Heat Dispel System for DINGSON Biscuit Oven using Thermocouple Temperature Sensor

In this paper, an automatic heat dispel system for DINGSON Biscuit Oven have been designed and simulated using Proteus program successfully. This system uses thermocouple temperature sensor to sense the oven temperature and automatically open and close the dispel system. The temperature in which the dispel open and close can be adjusted any time the operator needs to adjust it.


Introduction
Industrial ovens are heated plot used for dozens industrial applications, including drying, curing, or baking components. Industrial ovens can be used for large or small scale applications, in batches or continuously with a conveyor line, and a jumble of temperature ranges, sizes and configurations. Such ovens are used in lots different applications, including chemical processing, food production, and even in the electronics industry, where circuit slab are run through a traveler oven to attach surface mount components. The oven contains multiple zones; which tins be individually controlled for temperature. Generally, there are many heating belt followed by one or more cooling zones. The Biscuit moves through the furnace on a conveyor belt, and is therefore subjected to a controlled time temperature profile. Some of this industrial oven have a heat dispel system manually and automatically. In this paper, an automatic heat dispel system for the manual biscuit oven of the DINGSON Biscuit oven have been designed.

System Design
The heat dispel door design is shown in Figure 1 below. Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 5 October 2020 doi:10.20944/preprints202010.0073.v1 Figure 1 Heat dispel system door design The system circuit design is shown in Figure 2 below.

Figure 2 System circuit design
The material needed for this projects are shown in the Table 1 below

Methodology 3.1 Operation of the System
The thermocouple senses the temperature of the system. Since there is no bias voltage to the thermocouple the output voltage is very small. This output voltage is amplified using the amplifier and given to the comparator. The comparator compares the input voltage and the reference voltage given by the potentiometer and outputted a logic 1 or logic 0 depending on the given voltage. Then the transistors are used like a switch system. Depending on the transistors outputs, the two pole relays will have switched on or off. If the required oven temperature of the oven is 300 degrees or above, the heat dispel system door will open. This means the door of the dispel is controlled by a DC motor rotating in open direction and the reverse will happen if the temperature is < 300 degrees. The flow chart of the system is shown below.

Results and Discussions 4.1 Overview
The proteus simulation model of the system is shown below. The system is designed to open the dispel door for a temperature of 300 and above degree centigrade and to close the heat dispel door for a temperature less than 300 degrees centigrade. This temperature range can be adjusted via the potentiometer attached to the comparator.

Simulation of the Automatic Heat Dispel System for a 200 Degree Centigrade Baking Oven Temperature
The TCK thermocouple voltage adjustment and the simulation result are shown in Figure 5 and 6 respectively. The simulation result shows that the motor is rotating in door close direction and the indicator for heat dispel door closed Green led is on.

Simulation of the Automatic Heat Dispel System for a 400 Degree Centigrade Baking Oven Temperature
The TCK thermocouple voltage adjustment and the simulation result are shown in Figure 7 and 8 respectively.

Conclusion
In this paper, designing and controlling of a DINGSON biscuit oven have been done with the help of Protues software successfully. Thermocouple sensor has been used to sense the temperature of the oven in order to release extra heat from the oven depending on the temperature adjusted by the operator. The temperature range can be adjusted at the desired level for the effect of surrounding temperature. The simulation result shows that the system is effective for the given set point temperature.