How a Washing Machine WorksLapWoon Keung2005

What is a Washing MachineA washing machine is an machine that washes clothes, linen

Was made to help wash clothes easier

Steps to Cleaning Clothes

Decide on: Load size (small, medium, large, x-large)TempHow machine should agitateTime

Steps to Cleaning ClothesFill tub with clothes; Fills with water; Agitator starts to spin;After agitating Drains waterSpins clothesRefills; agitates more Drains Spins more.

History of the Machine that Washes Before washing machines people cleaned clothes in the stream Then its beat with rocks or they scrubs clothes clean on a washboard.

History of the Machine that Washes

First electronic: American - Alva J. Fisher - 1901Had Electronic vertical-tube machine with built-in turbo washers or Vertical axle fitted with blade.

Alva J. Fisher - Thor

History of Washing MachineReplaced steam boiler and the washtub; wooden bins that was filled with soap hot water

First mechanical washing machine used heavy blades

History of Washing Machine

Principle of tossing clothes inside in a rotating cylinderUsed in 1850 in a English laundry.Used in 1840 by the French: Industrial model, double sheathing, 4 compartments, driven by a crank.

1915 Crank to turn agitator

Inside of a Washing MachineTwo Steel TubsOuter = Seals water. Mounted so that inner can move without banging.Inner = Holds clothes and with the agitator in the middle with holes around the side of the tub. Attached to gearbox

Inside a Washing MachineThere are 3 pulleyOne side of frame moves upOther side frame goes downHas Damping SystemUses friction to absorb force of the dangling pulleys

Inside a Washing MachineEach four corner has mechanism that:Works like disc brakeAttached to springSqueeze two pads against metal plateAttached to black frame

PlumbingJobsFills washing machine with correct temperature of waterRe-circulate water from bottom of the wash tub back to the top, during wash cycle

PlumbingHook for two water lines on backCold HotHooked to the body of the solenoid valveSolenoid valveFeed into a single hoseHot valve, cold valve or both valve will open

PlumbingBefore hose release water into tub, it is send through anti-siphon devicePrevent water from being sucked back into the water lineWhite plastic device has big opening that allows air inSuction would only get air, not water

PlumbingWater InletWater enters that wayNozzle to the right: Overflow portConnected to pipes that dump water onto floorGoes to floor instead of the tub and motor

PumpRe-circulates water and drains itHas 2 separate pump in oneBottom half: Hooked to drain lineTop half: Re-circulates wash water

PumpVanes of the bottom layer of the pump: Push water around

The pump can reverse directionSpins different way while doing different jobs.

Pump Clutch is hooked up to pump Drain hose loops all the way to the top of machine One end is hooked to bottom of tub Open to atmosphere

Drive Mechanism

A piece of rubber seals the outer tub to the gearboxHas 2 jobsAgitate clothes: Moving them back and forth inside tubSpin Tub to force water out

Inside the GearboxPulleyPie-shaped gears has link on itWasher goes to spin cycle - locks up, everything spins at same speedGears - angled teeth

ControlCycle switchSpeed and temp. control switchWater level control switch plumbingDesigned before micro-controllers were being used in appliances

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BibliographyWashing Machine. The World Book Encyclopedia. 2003ed.Walerie-Anne Giscard dEstaing. The Second World Almanac Book of Invention. New York; Pharos Book, 1986.Karim Nice. How Washing Machine Work. How Stuff Works. 1998-2005. How Stuff Works. May 3, 2005