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How a kitchen blender works

How a kitchen blender works

A blender is the appliance you can't live without if you want to turn solid ingredients into liquid deliciousness.

Blenders are versatile appliances that have a variety of uses in the home, business and laboratory. Basically, a blender has a motor at the bottom with a control panel that has several different speeds. This motor drives a pitched blade that chops items that are put in the blender. A tapered cylindrical pitcher with a lid attaches to the base. The shape of the pitcher and the pitch of the blades create a kind of tornadic action which circulates the contents and chops them to the desired consistency. The pitcher has a lid that usually has a rubber seal. This seal prevents any food from spraying out.

Blenders also have a place in industry labs for research in areas like microbiology, where researchers use it to extract bacteria from samples

The newer immersion blender configuration has a motor on top connected by a shaft to a blade at the bottom, which can be used with any container.

History of blenders
History of blenders
How it works
1. Let's see how it works. Suppose you drop a strawberry in the blender. You push a button to start the blender, and the motor begins to turn the blades. The circular whirring motion creates a vortex or a spiral movement in the fluid. In the blender, the fluid includes both liquid ingredients and air. The vortex causes a vacuum at the centre of the jar, which pulls the strawberry toward the middle, much as a tornado does.

2. As the strawberry combines with the other ingredients and begins to liquify, the liquid follows the blade in a whirling motion around the container, forming a well near its centre. The well in the centre of a blender's vortex is shallow, so it displaces the contents as they're drawn toward the axis at the centre of the blade.

3. The whirling motion and lack of space below the blades forces the liquified strawberry up and on the sides. This circular pattern continues, whipping air into the contents, which helps mix the ingredients more quickly, until you stop the blender. The final result is a frothy strawberry smoothie with a homogenised blend of ingredients and a consistent texture.

Food processors are appliances used for solid food, and blenders are better for drinks. Most food processors operate at a single speed, which is slower than a blender, but they have a pulse function that gives you greater control over chopping, kneading and cutting. Food processors aren't suited for crushing ice or making frozen drinks, and blenders are still best for pureeing soups.

Courtesy: Gadgets and Gizmos

Published on: Jun 06, 2012, 12:00 AM IST
Posted by: Surajit Dasgupta, Jun 06, 2012, 12:00 AM IST