KITCHEN EQUIPMENT AND UTENSIL

today, i will write kitchen equipmen and utensil.
1.

 

name : freezer

material flammabel 

function : for save your material in the long time.

History about freezer

     Before mechanical refrigeration systems were introduced, people cooled their food with ice and snow, either found locally or brought down from the mountains. The first cellars for keeping food cold and fresh were holes that were dug into the ground and lined with wood or straw and packed with snow and ice. For a while, this was the only means of refrigeration throughout most of history.

The advent of modern refrigerators changed all that.

     So how do they work? Refrigeration is the process of removing heat from an enclosed space, or from a substance, to lower its temperature. To cool foods, a refrigerator uses the evaporation of a liquid to absorb heat. The liquid or refrigerant used in a refrigerator evaporates at an extremely low temperature, creating freezing temperatures inside the refrigerator.

     Here’s a more technical explanation. It's all based on the following physics: a liquid is rapidly vaporized through compression. The quickly expanding vapor requires kinetic energy and draws the energy needed from the immediate area, which loses energy and becomes cooler. cooling generated by the rapid expansion of gases is the primary means of refrigeration today.
The first known artificial form of refrigeration was demonstrated by William Cullen at the University of Glasgow in 1748. However, he did not use his discovery for any practical purpose.

In 1805, an American inventor, Oliver Evans, designed the first refrigeration machine. But it wasn’t until 1834 that the first practical refrigerating machine was built by Jacob Perkins. It used ether in a vapor compression cycle.

     Ten years later, an American physician named John Gorrie built a refrigerator based on Oliver Evans'  design to make ice to cool the air for his yellow fever patients. In 1876, German engineer Carl von Linden patented not a refrigerator, but the process of liquefying gas that has become part of basic refrigeration technology.

(https://www.thoughtco.com/history-of-refrigerator-and-freezers-4072564)

2.

name : proofing machine
material : stainless stell
function : to develop dough or bread in quick time 

3. name : spoon
material : stainless stell
function : to help someone put food into the mouth.