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Microwave Oven Parts
Microwave Oven Parts Let's Look Inside The Microwave
Microwave oven utilizes various combination of mechanical devices and electrical circuits to bring forth and control the output which is the microwave energy that can be used for cooking and heating. Generally, microwave ovens consist of five parts.
Picture of Microwave Oven Parts
High Voltage Transformer
High voltage power source in a form of a simple transformer or just an electronic power converter that passes the energy to the magnetron.
The above figure is the illustration of a high voltage section in which a high voltage transformer with a special kind of diode and a capacitor arrangement functions to increase the typical household voltage of almost 115 volts to an extremely high amount of voltage approximately 3000 volts.
This quantity of powerful voltage is quite unhealthy and even deadly or humans. This is where the next important part, the magnetron tube has the necessity to do his function and that is to convert dynamically this high voltage to rolling waves of electromagnetic microwave cooking energy.
Cavity Magnetron
This microwave oven parts is responsible of converting the high voltage electrical energy to a microwave radiation. Most of the available microwave ovens in the market have the option giving the user to choose among the different power levels which includes one or more levels of defrosting.
However, in most of the microwave ovens, there has no change in the microwave radiation intensity, rather, the magnetron has been turned on and off in the form of duty cycles of many seconds at a given time.
This process can be actually heard by a humming sound in the oven, or in other way, can be observed when the microwaving airy foods may expand during the heating phases and lessen the size when the magnetron has been turned off.
This kind of oven, the magnetron had been driven by a linear transformer which can practicably be switched completely either on or off. Latest models that are available in the market have inverter power supplies in which it utilizes pulse width modulation to give genuinely continuous low power of microwave heating.
Microwave Magnetron Control Circuit
Magnetron control circuit, and has commonly with a micro controller. This is sometimes referred to as the control section and it consists of a timer, either electromechanical or electronic in type, a system that governs or controls the power output and several protection and interlock devices.
The components that built up the high voltage section functions to step up the household voltage to a higher voltage. This high voltage is then converted to microwave energy.
Essentially, this is the illustration on how it works. In the figure above, the electricity that have been derived from the wall outlet moves through the power cord and then enter the microwave oven by a series of fuses and safety protection circuits.
The mentioned circuits constitute different types of thermal protectors and fuses that are made to deactivate the oven in case that an electrical short of an overheating state occurs. If all of these systems are in normal condition, the electricity moves through the timer and interlock circuits.
If the over door is closed, there is also an electrical path that has been established through the series of interlock switches for safety purposes.
Waveguide
Waveguide is a microwave oven parts that controls the direction of the microwave. It is a metal channel in which the microwave energy is transmitted into and then feeds the microwave energy to the cooking area wherein it meets the slowly rotating metal blades that constitutes the stirrer blade.
Other microwave models uses a kind of rotating antenna as others rotate the food by the waves of energy by a revolving carousel.
In any event, the desired effect is to disperse evenly the microwave energy in all of the areas in the cooking compartment. Some of these waves reach directly the food, while others bounce off on the metal walls and flooring.
In summary, the microwave energy passes all the surfaces of the food coming from every direction.
Cooking Chamber
This microwave oven parts is a faraday cage enclosure that is capable of preventing the microwave from escaping to the environment.
A glass panel is common for oven doors for easy viewing. To maintain the shielding, it has layer of conductive lock. And the size of the holes in this lock is much lesser compared to the microwave’s wavelength, so the microwave radiation is not capable of passing through the door.
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