A blower (pronounced “bılovır”) is equipment that transfers air in a ventilated environment at high flow rates or low pressure. It rotates the fan using the force from a motor. Blowers can operate either as a blower (forcing air) or as a vacuum. The fan inside the blower rotates and draws air from the intake. The trapped air is then pushed toward the outlet, completing the blower’s function. Blowers are mainly used for transporting air. The air drawn into the blower must pass through a filter before being expelled; otherwise, dirt can accumulate on the lobes and inside the housing, causing wear. This wear can reduce the blower’s capacity and efficiency. Blockages may occur at the intake or discharge, so a safety valve and proper flow control are necessary. A blower should not be reversed, as failure to intake air can shorten its lifespan and decrease efficiency.
Differences between fans and blowers
Both are used for air circulation but have different characteristics. A fan affects the air around a room or area, while a blower focuses on a specific point. Fans act over a wider area; blowers are more targeted. Fans consist of blades that move air, producing low-pressure airflow. Blowers are similar to fans in generating airflow but differ because they provide air at a specific location. Fan pressure ratios are usually below 1.1, whereas blower pressure ratios are around 1.1 to 1.2. Fans are classified as axial-flow or centrifugal, while blowers are classified as single-stage or double-stage. Another difference is that fans consist of an electrically powered motor and blades, whereas blowers include a fan, outer casing, inlet, and outlet.
Factors to consider when selecting a blower
Each blower has unique requirements. First, determine the correct location for installation. Measure the area and decide on the airflow direction. Check oil levels when starting the blower for the first time. Inspect bolts, belts, and similar components carefully. Ensure the blower operates smoothly and without excessive vibration.
Applications of blowers
Blowers are widely used. Examples include boiler applications, oven blowers, dust collector blowers, kitchen blowers, exhaust blowers, and ventilation blowers.
Benefits of using a blower
- Provides oil-free air or gas, ensuring regular airflow.
- Easy to maintain with minimal additional costs.
- Long lifespan.
- Noise can be a concern, but low-noise blower models are available to mitigate this issue.