Dishwasher

=Dishwasher= jgaro12toc

Purpose
//What is the fundamental purpose of the device?// The fundamental purpose of a dishwasher is to wash dishes to make then clean.

Energy
//What energy transformations are seen in its operation?// The energy used within a dishwasher is kinetic energy. The energy goes in as electricity from the power outlet and is then turned into heat. The heated energy is then dispersed throughout the dishwasher due to kinetic energy.

Here are examples of other devices which use kinetic energy.
 * Wii Sensor Bar
 * Washing Machine
 * Voice Changer
 * Tablet
 * Mouse (Trackball)
 * Pitching Machine
 * Shuttle Rockets

Controls
//What sensors/controls are designed into the device?// There are numerous controls and sensors designed into a dishwasher. Each dishwasher is different, meaning each one has various sensors on the outside of the it. However, the standard dishwasher has the sensors which determine the type of rinse cycle they would like and how to start and end each cycle. A heating element first heats the water using the intake valve, which is where the water enters the dishwasher from the water supply tank. A large pump, which is powered by a motor, disperses the water throughout the machine using spray arms. The spray arm knocks off food particles which then fall into a small blade or disposal which is powered by the pump. Once the rinse cycle is done, the pump then propels the water out of the dishwasher. One of the final cleaning mechanisms is the dry cycle. The dry cycle uses the heating element at the bottom of the dishwasher to heat the air and therefore dry the dishes. There are two types of pumps, reversible and direct-drive pump. The reversible pump can change its direction, but the direct-drive pump cannot and must use a solenoid to open and close the valves or switches. Overall, there are many different sensors and controls within a dishwasher.
 * Electricity To Heat : The drying cycle converts electricity to heat in order to heat the air and dry the dishes.



1. A source of water is heated. 2. The water is then dispersed throughout the walls of the dishwasher. 3. Water is sprayed from the lower and upper racks of the dishwasher. 4. Water drops down and is collected at the bottom of the dishwasher. 5. The water is drained from the machine.
 * (Optional 6) Heated air is dispersed through the dishwasher, drying the dishes.

Materials
//What material(s) are essential to the device?// There are numerous essential materials to a dishwasher. However, one of the most essential parts to a dishwasher are the spray arms. There are upper and lower spray arms in order to disperse water throughout the entire machine. Spray arms are designed to shoot high pressure and high temperature water at dishes. In order for the dishes to clean properly, spray arms are essential to the design of the dishwasher. Overall, spray arms are essential to the dishwasher to clean the dishes fully and properly.

Science
//What is scientific principle is central to its operation?// The scientific principle of a dishwasher is electric currents. There is an on and off switch which controls the dishwasher.
 * Electrical Current

Design
//What does a typical device look like?// A typical dishwasher looks like a big box in which you could open. On the outside of a dishwasher, there are numerous sensors in which you use to control the device. The inside of a dishwasher typically has a bottom rack and a top rack in which the dishes are placed. Also, dishwasher can come in a variety of colors.



Evolution
//What changes have there been (or could there be) in this device?// There have been many changes to the dishwasher over the years to improve it. Also, there are many changes that people are working on in the near future to improve the dishwasher. Manufacturers are trying to attract customers into buying the dishwasher. Some improvements manufacturers are trying to make are quieter operation and energy efficiency. Also, cleaner dishes without pre rinsing are existing features that are continuously being improved. The latest advance in dishwasher manufacture is the sanitation option with a high heat cycle to kill bacteria. Overall, the dishwasher has come a long way over the years, but improvements are continuously being made to the device.

Competitors
//What other devices serve a similar purpose?//
 * Washing Machine : A washing machine serves a similar purpose becasue it is also a machine used to wash items.

Partners
//What other devices work in conjunction with this device?//
 * Clothes Dryer : A clothes dryer works in conjunction with a dishwasher because both a dishwasher and clothes dryer use a drying mechanism to dry the items within the machine.

Siblings
//What other devices use the same scientific principle?// The following devices all share the same scientific principle of electrical currents.
 * Clothes Dryer
 * Washing Machine
 * Calculator
 * Wii Remote
 * TV Remote
 * Nintendo DS
 * PSP
 * MP3 Player
 * LED Lightbulb
 * IPod Click Wheel
 * Gameboy Advance SP
 * Gameboy Color
 * Guitar Amplifier
 * XBox 360 Controller
 * Cell Phone Touchscreen
 * Computer Keyboard