Group Member:Chan Ting Pong 07619773TCheng Cheuk Yin 07657694TMok Wai Tung 07600597THo Siu Kin 07629394T

To design one green house item

Focus on smoker’s concern Focus on second hand smoke result To understand the smoker’s habit

(specially for those smoker who need to use computer for a long period )

Main purpose• To convince indoor smoker

and min. any affect to the others

• Improve the indoor air condition

Short-term effects of Passive Smoking Some of the immediate effects of passive

smoking include eye irritation, headache, cough, sore throat, dizziness and and nausea.

Adults with asthma can experience a significant decline in lung function when exposed, while new cases of asthma may be induced in children whose parents smoke.

Short-term exposure to tobacoo smoke also has a measurable effect on the heart in non-smokers. Just 30 minutes exposure is enough to reduce coronary blood flow.

• Health effect associated with Exposure to Environment Tobacco Smoke

1. Developmental Effects2. Respiratory Effects3. Carcinogenic Effects4. Cardiovascular Effects

Need to use computer for a long period Complained by other people when

smoking indoor Wish to min. any affect to others

Target user Indoor smoker Long time computer using smoker

Main function should included: A receptacle for ash and butts from cigarettes and

cigars To reduce the harmful substance and side effect of

cigarette smoke from burning incense Act as an adornment

Requirements & constraints:• Scale should not so big• Energy saving• Safety• Movable filters and ashtray for cleaning

Human Factor

Outlook (attractive)

Price (acceptable & reasonable)

Functional (powerful)

Convenience to use

With clear guideline for the usage

Pragmatic

Ergonomic Factor

Gap size for cigarette put on ashtray

Easy to clean up

• Design Layout (Egg Shape)• Function• Mechanism (Internal Structure)• Material selection• Prototype Demonstration

Egg Shape Good looking (as household decoration

item) Without any sharp corner for safety

consideration

3 individual parts

Upper Part

Supporting

Base

With ashtray & air cleaner basic function With USB switch Removable & washable filter

Manufacturing Process- Blow moulding for case- Injection moulding for supporting part & base 3 Parts of individual assembly (Ashtray base,

Supporting part & air refreshing parts) 200mA, 12V (P=VI = 12x0.2 = 2.4W)Structure

Filter set Switch Circuit

UPPER CASEPP - POLYPROPYLENE

SUPPORTING & BASE ASHTRAY

PC - POLYCARBONATE

Wide range of industrial usage

During the manufacturing process, antistatic additives can be added to help PP surfaces resist dust and dirt

Fulfill the standard of World Health Organization (WHO) – without any side effect for human

Heat resist Wide range to use as

ashtray usage

Safety Concern• Material (PP & PC)• Shape of our product (Round bottom base &

without any sharp corner) • Switch (Prevent short circuit)

3M Air Cleaning Filter Refillable & Removable 2 layers of filter used to double the

performance Max. 2 months performance but if can

vary and will depend on the individual conditions in any indoor environment

Infra red Micro Switch

Energy saving

Higher (switch on all the time)

Lower (only switch on during the cigarette put on the ashtray)

Cost Higher Lower

Installation Harder Easier

After a serve period, user may need to renew the filter to maintain the filter function

Base ashtray also need to clean up for a period

A indicator is used to remind user to renew the filter set

Indicator