Microwave Ovens -- Construction and Operation
Microwave ovens use a wide variety of electrical circuits and mechanical components to produce microwave energy for heating and cooking [3]. There are two primary sections within a microwave: the control section and the high-voltage section. The control section consists of a timer (electronic or electromechanical), a system to control the major power output, and diverse interlock and protection devices. The components in the high-voltage section serve to increase the voltage. Higher and higher voltages are then converted to microwave energy.
When plugged into an electrical circuit, electricity enters the microwave oven through a series of fuse and safety protection circuits. These circuits include various thermal protectors that can also deactivate the oven in the event of overheating or a short [2]. Under normal circumstances, electricity passes through to the interlock and timer circuits. When an oven door is closed, an electrical path is created through a network of safety interlock switches. Once the operator sets the oven...
The control circuit generates a signal that causes the relay or triac to activate, thereby producing a voltage path to the high-voltage transformer. This high-voltage transformer, along with a special diode and capacitor arrangement, has the capacity to increase the typical household voltage of about 115 volts to as much as 3000 volts [1]. Such high voltage is required for the magnetron tube to convert the high voltage into undulating waves of electromagnetic cooking energy [3].
The microwave energy is transmitted into a metal channel called a waveguide, which feeds the energy into the cooking cavity of the microwave where it encounters the slowly revolving metal blades of the stirrer blade. Some models use a rotating antenna while others rotate the food through the waves of energy on a revolving carousel. Either way the goal is to evenly disperse the microwave energy throughout all areas of…
In general, studies of commercial resin matrixes indicate volumetric shrinkage in the curing process as great as seven percent, with most undergoing shrinkage of two or three percent (Seghatol & Durand, 1999). In dentistry, the comparatively small dimensions of the products composed of polymers and the specific point-load stresses sometimes encountered by dentures magnifies the undesirable effects of even small percentages of incomplete polymerization and volumetric shrinkage. Moreover, dental materials
Appliance Marketing Plan Worksheet Product & Mission Statement Product Description: MicroGrill is a modern microwave oven using convection with the availability of a grill. Given Mission Statement: We enable consumers to improve the quality and convenience of their lives by providing innovative electronics solutions. Feature (Example): Compact and sleek design How this supports the mission statement: Making the appliance much easier to store and use in a wider variety of kitchens, both large and small. Feature: Multi-faceted
microwave oven is one of the great inventions of the twentieth century since millions of homes in America have one. Microwave ovens are popular because they cook food incredibly quickly. They are also extremely efficient in their use of electricity because a microwave oven heats only the food and nothing else. A microwave oven uses microwaves to heat food. Microwaves are radio waves. In the case of microwave ovens, the
Final Marketing Plan for Natural Machines' Foodini D Food PrinterToday, professional kitchen users are searching for innovative solutions to the challenges that are inherent in the food service industry, including most especially ways to prepare foods that are tasty and nutritious in an efficient fashion. In response to this growing demand, a number of manufacturers are promoting three dimensional (3D) food printers as a viable solution to these needs. The
If the household possess a storage rooms, RFI tags will help locate the olive oil among other supplies or the location of a certain spice. This is something that increases efficiency when cooking, thus reducing overall time-associated costs. Logistics Logistics is closely tied with the supply management issues previously described. Logistics cost decreases within the household because, due to a better supply management guaranteed by RFID usage, the individuals in the
Wireless Local Area Networks The establishment of home and business networks desirous of upgrading to Wireless Local Area Network- WLAN confront with the problems of choosing from available alternatives. The vendors offer several products for sale that hovers around different wireless standards like 802.11a, 802.11b, 802.11g and Bluetooth. During the year 1997, the Institute of Electrical and Electronics Engineers -- IEEE developed the first WLAN standard. They termed it 802.11 in