Page 89 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

EXERCISE 138: Demonstrate the setting different
parameters for DC power supply blower

machine

Objectives

At the end of this exercise you shall be able to
• to demonstrate different parameters for blower machine
• to demonstrate DC power supply of blower machine.

Requirements

Tools/Materials
• Portable fans - 1 No. • Turbines - 1 No.
• Leaf blowers - 1 No. • Air movers - 1 No.

Theory
• A blower is a machine that creates pressure to move air at required pace. Blowers, to put it another way, are
machines that blow air or gas to perform certain functions.
• These devices are well-suited to complex operations and have proved indispensable in a number of
instances.

• We hear about blowers around us, and many of us may have seen them functioning as well.
• Blowers are installation equipment that transfers air at high or low pressure in the emitting environment and
turns the fan with the force applied by the engine

Procedure

1 Power Input: This is where the blower machine is connected to a power source.

2 On/Off Switch: Allows the user to turn the blower machine on or off.
3 Speed Control: If the blower machine has variable speed settings, this control adjusts the speed of the
blower motor.

4 Blower Assembly: This includes the blower motor and fan assembly responsible for generating airflow.
5 Air Outlets: Where the airflow generated by the blower machine is expelled.
PARAMETERS
DC blower machines, like other fans and blowers, have several key parameters that are crucial for their
operation and selection. Here are some of the important parameters
1 Airflow (Q): This is the volume of air that the blower can move per unit time. It’s usually measured in Cubic
Feet per Minute (CFM) or Cubic Meters per Minute (CMM).

2 Air Pressure: This is the pressure that the blower can generate to overcome the resistance in the system.
It’s typically measured in inches of water gauge (in-wg) or Pascals (Pa).
3 Power (P): This is the electrical power consumed by the blower. It’s usually measured in Watts (W).
4 Fan Speed: This is the rotational speed of the blower’s impeller. It’s usually measured in revolutions per
minute (RPM).

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