household technology and appliances Flashcards
how has technology contributed to the efficient management of the home
- reduced amount of labour required to carry out household tasks eh hand washing clothes vs washing machine, more leisure time now
- homes are more clean and hygienic-higher standards of living and reduced health problems
- heating and lighting can be controlled by phones-homes are warms, enhances security
- can be used for household financial tasks eg budgeting and banking, saves time
factors to consider when choosing an appliance
ICECGD
- information
- cost
- energy efficiency
- cleaning and maintenance
- guarantee
- design
discuss role of information in choosing appliances
features, brands, models etc
ensure meets specific needs
showrooms, magazines, online, word of mouth, salespeople
discuss role of cost in choosing appliances
initial cost- shop around, value for money, reliable brands may be more expensive but superior in the long run
running cost-higher the wattage more electricity itll use
servicing cost- often excludes cost of parts
discuss role of energy efficiency in choosing appliances
a rated- least energy
g rated-more energy, more expensive to run, harm environment
discuss role of cleaning and maintenance in choosing appliances
ensure easy to clean to reduce time and effort
discuss role of guarantees in choosing appliances
written contract between manufacturer and consumer made at the time of purchase which states that if a fault arises within a certain period of time the manufacturer will repair or replace the appliance free of charge
discuss role of design in choosing appliances
coordinate with existing decor
measurements suitable
easy to operate, fullfill function
design and construction of a food processor
base unit- metal or toughened plastic with legs for stability. motor with wattage, flex connects to electricty supply, belt connects motor and spindle, on/off switch, speed control
bowl- toughened plastic . sits on spindle. safety locking lid with a feeding tube and pusher to push food into bowl
working principle of a food processor
motor- when plugged in and switched on causes belt to turn
attachments- belt causes spindle and attachments to rotate at a high speed.
bowl/feed tube- add ingredients at start or during processing, pusher used to push food through to avoid cutting off fingers
safety locking lid- prevents food processir from operating unless lid is fully locked in position
guidelines for using a food processor
- follow manufacturers instructions
- dont overfill
- correct attachment for function
- when pushing food through tube, cut small to avoid breaking tube
- never use fingers to push in food
- if running for long time turn off at intervals to avoid overheating
- scrape down sides to avoid uneven blending
guidelines for caring for and cleaning a food processor
unplug before cleaning
take apart carefully
hot soapy water, rinse carefully, dry well
wash outer casing damp cloth to remove any splashes
store with lid off to enable air to circulate and prevent build up of odours
design and construction of a kettle
jug- various sizes/colours/shapes/materials
tightly fitting lid- may be opened or removed
spout-trap particles of limescale
water level indicator-shows max/min water levels
handle- heat resistant plastic
on/off switch-controls electricity supply
indicator light- shows whether kettle is in operation
flex and 3 pin plug- connects to electricity supply- connected to base of kettle or removable base
heating element- heats water inside the kettle
thermostat-automatically switches off kettle when water reaches boiling point
outlines the working principle of a kettle
heating element-when plugged in and switched on electricity flows through heating element which provides resistance to the current of electricity causing element to heat up
water heats- bottom heats, rises, cold falls, convection current, even heating
thermostat-100 degrees, thermostat switches off kettle
boil-dry device- if insufficient water present, kettle switched off, this prevents fires
guidelines for using a kettle
dont overfill switch off and unplug before filling manufacturers instructions ensure heating element is covered to avoid risk of electrical fires allow to cool before refilling
types of fridges
standard- neatly under counter, ice box on top
larder fridge- tall, more space, no ice box, separate freezer required
fridge freezer- two cabinets, fridge and freezer, one on top of other
american stle fridge freezer- large fridge and freezer side by side and of equal size , often includes ice box and juice dispenser
design and construction of a fridge
outer casing- enamelled steel coated with plastic in variety of colours , integrated fridges have door matching cabinets
inner casing made of moulded polystyrene plastic
insulating material between inner and outer casing keeps fridge cold
door with rubber gasket and magnetic strip- forms airtight seal when closed
interior light- switches on when opened adjustable shelves clear plastic vegetable drawers icebox thermostat keeps fridge between 3 and 4 degrees flex and three pin plug
modern features of refrigerator
ice/water dispenser
humidity controlled drawers
zoned refrigeration
automatic defrost
working principle of a refrigerator
compressor- at base of fridge, contains gas refrigerant. pump or motor pushes gas refrigerant iso butane up into condenser above
condenser- cools gas, condenses it into a liquid- sent to evaporator above. cooling fins radiate off heat to keep condenser cool
evaporator- rapidly evaporates liquid refrigerant into gas by drawing out heat from inside the fridge cabinet keeping it at a constant temp of 3-4 degrees. gas refrigerant returns to compressor and cycle begins again
thermostat maintains constant temp in fridge by turning on and off ,motor when needed
compressor
at base of fridge
contains gas refrigerant isobutane
motor/pump pushes gas refrigerant up into condenser above
condenser
cools the gas refrigerant and condenses it into a liquid
liquid is sent to the evaporator above
cooling fins radiate out heat produced in order to keep condenser cool
evaporator
found at top of fridge , rapidly evaportates liquid refrigerant back into a gas refrigerant by drawing out heat from the fridge cabinet maintaining it at a constant temp of 3-4 degrees
liquid refrigerant returns to compressor and cycle continues
guidelines for using a refrigerator
manufacturers instructions
do not position beside heat source
avoid opening door unnecessarily, dont leave open for prolonged periods of time
avoid overfilling
meat on bottom shelf to avoid cross contamination
keep food covered to avoid drying out, this also avoids transfer of odour between foods
caring for and cleaning fridges
wipe spills immediately
wash shelves with hot soapy water, inside with warm water and bicarbonate of soda and outside with damp cloth and polish with dry cloth
if not in use unplug and open door
clean door gasket to prevent food lodging and preventing door from closing
clean cooling fins to prevent dust build up
