About Vacuum Cleaners
The extremely essential tool within the carpet cleaning industry is the vacuum cleaner. Vacuum cleaners are available in all sorts of shapes and sizes, particularly designed for various cleaning applications. Vacuum cleaners can be categorized into two basic groups. Those which are made for the removal of dry soils, and others designed for extraction of liquids. Several various attachments are available for use in combination with most of these vacuum cleaners. Each one designed for specific cleaning jobs.
All of these factors taken into consideration make vacuum cleaners a most multipurpose and indispensable cleaning tool of the trade. The choice of the proper vacuum unit along with the appropriate attachment for the cleaning task to be performed is most significant to the carpet cleaner technician. In order to correctly choose the right combination, the operator must first understand the basic principles of how a vacuum system functions.
First and foremost, let us define the true meaning of word “vacuum”. A “Vacuum” is a space partially exhausted, or from which almost all air has been removed through artificial means. Conversely, a ‘vacuum cleaner’ is a device of creating, containing, or utilizing a partial vacuum for cleaning as in a vacuum cleaning system.
Vacuum cleaners contain a vacuum motor assembly which acts as a blowing fan making a vacuum behind itself. Because a vacuum is an unnatural state, air pushes in to fill the void. It is this in-rushing air, moving through the fan that creates airflow and suction need for vacuum cleaning. “Vacuum Cleaning”, in a nutshell is the removal of soils from a surface by means of suction. Vacuum cleaning for the intention of removing dry soils is generally considered to be a form of sweeping.
A vacuum cleaner’s effectiveness ratings should be based on airflow and suction, and not on amperage or horsepower as they were rated in the past. Far too much stress has been placed on the horsepower rating of the electric vacuum cleaner motor. The relationship between horsepower and cleaning power, as applied to a vacuum cleaner, has reached the point where informed consumers and operators look as horsepower ratings with skepticism. When looking at horsepower ratings one must determine whether the horsepower is applied to airflow or suction.
In general, a vacuum cleaner designed for the removal of dry soils has a high airflow rating and a relatively low suction rating. A vacuum cleaner particularly designed to remove liquids, conversely, would have a low airflow rating, and a relatively high suction rating. To have ratings on both airflow and suction is practically impossible, but a high average compromise is possible and usually incorporated with wet dry vacuum cleaning systems designed to remove both wet as well as dry soils from surfaces. In order to better understand the difference between airflow and suction, let Auckland Carpet Cleanings start with describing airflow.
Airflow relates to air volume, and is entirely different from suction. The airflow of a vacuum cleaning systems is measured in ‘cubic feet per minute’ or (C.F.M). This measure is used to point out how many cubic feet of air that a vacuum motor is able to inhale and exhaust without restriction within a one minute period. A high efficiency vacuum cleaner for dry soil removal on carpets for instance, might have the ability to move 156 (CFM) while a high efficiency vacuum cleaner particularly designed for the removal of liquids might only have the ability to move 88 (CFM).
Suction is measured in ‘inches of waterlift’. Inches of waterlift, is how high a vacuum motor is able to lift a column of water one inch in diameter within a tube. At that point, no airflow is there only suction. Special hand held vacuum gauges for measuring ‘inches of waterlift’ are available for measuring the suction of vacuum cleaners. A high efficiency vacuum cleaner for dry soil removal on carpet for instance might have an ‘inches of waterlift’ rating of only 12″, while a high efficiency vacuum cleaner particularly designed for removal of liquids might have a rating of 150″.
Hence, it is the balance between the CFM rating and the “inches of waterlift” rating of a vacuum cleaner which determines its most appropriate cleaning application.
Auckland Carpet Cleanings 09-489 5599