PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL

• Goal – design a hairdryer that decreases drying time compared to the Conair Ion Shine 1875 and does not increase noise
• PAX increases airflow
• Goody increases temperature to UL maximum
• Nozzle outlet diameter set at 42.5mm
• Must use 24VDC Johnson motor
2
PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL

1.5
2.5
2
3
Hairdryer Performance Comparison
(120V - no heat)
Conair Ion Shine
Super X Solano
Solano Turbo Ultra Lite
Silence HP
Revlon Fast Dry
Centrix Q-Zone
Conair Yellow Bird
Goody Prototype
1
0.5
0
0 5 10 15 20 25
Airflow [CFM]
30 35 40 45 50
• Eight commercially available hairdryers were baselined
• The Conair, shown in red, has the highest airflow
3
PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL

4
PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL

Performance for Hairdryers
(highest speed & lowest heat - 120V)
4
3.5
3
2.5
2
1.5
1
0.5
0
0
Conair Nano Silver Y214N
PAX Fast Dry Full Proto
10 20 30
Q [CFM]
40 50 60 70
• PAX design produces 35% more airflow at free-air operating point (circled on the graph) 5
PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL

• PAX design has very similar sound levels to Conair with grills/filter removed
• Due to prototype imbalance, PAX design showed a tone at
~240Hz, which ceased with the balanced, molded fan blade
40
30
20
10
0
80
70
60
50
Sound Frequency - At Inlet
PAX Fast Dry with H1 Heater 24V
Conair Prototype with Heater 24V
Frequency [Hz]
50
40
30
20
10
0
80
70
60
Sound Frequency - At Outlet
PAX Fast Dry with H1 Heater 24V
Conair Prototype with Heater 24V
Frequency [Hz] 6
PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL

• Goal – decrease hair drying time while maintaining or improving current noise level
• PAX increased output, which
decreased drying time by 35%
PAX Scientific, Inc. – PROPRIETARY & CONFIDENTIAL