Knowing where a refrigerator’s components are located can be useful information, especially if your refrigerator is on the fritz. Apart from the condenser, which is responsible for converting gaseous refrigerant into liquid, the evaporator, which is responsible for converting liquid refrigerant into gas, is perhaps one of the most important components for keeping a fridge cool. While the condenser is always located on the outside of a refrigerator, the evaporator is always on the inside.
The majority of residential refrigerators have their evaporators located against the back walls of their freezers. These evaporators consist of coils, which absorb heat, and fans, which circulate the resulting cool air. In addition to circulating the air within freezers, evaporators use fans to send cool air into food storage lockers, or the fresh foods sections of refrigerators. While evaporators can cool air to freezing temperatures -- below 32 degrees Fahrenheit -- by the time that air travels to a fresh foods section it will be slightly warmer, which is why liquids, fruits and other food items don’t freeze when you put them in the fresh section of the fridge but do freezer when you put them in the freezer.
Freezer and Fresh Foods Section
As BestStuff.com points out, one of the problems with the standard placement of a refrigerator’s evaporator is that it does not provide fresh foods with enough humidity or moisture. In a freezer, any moisture present in the air will freeze to the evaporator as its coils suck away heat. As a result, the air that the evaporator’s fan circulates into the fresh foods section will be dry. To increase humidity in the fresh foods section, some appliance manufacturers have started installing two evaporators in their refrigerators. Per the standard, one powerful evaporator goes in the freezer for super-cooling air, while a second, less-powerful evaporator goes in the fresh foods section for providing slightly warmer air that retains more of its moisture content.
Attached to the Metering Device
Regardless of where an evaporator is located spatially, the component will always be connected to a metering device. In the majority of residential refrigerators, a metering device consists of a copper capillary tube, which is a tube with an incredibly tiny internal diameter. The metering device is responsible for controlling the flow and pressure of refrigerant liquid as it travels from a refrigerator’s condenser to its evaporator.
Evaporators are some of the noisiest refrigerator components. If your fridge has become unbearably loud, the motor of the evaporator fan could be to blame and replacing it will likely be the best solution. Another cause of noise is the evaporator coil, which will produce hissing sounds and steam during defrost cycles. However, this defrosting is a necessary “evil” and does not mean your evaporator is broken.
Why Does a Refrigerator Compressor Fan Keep Running?
A refrigerator's compressor carries out a vital function of the electrical refrigeration unit that provides cold air to the appliance. The compressor...
How to Test a Refrigerator Evaporator Fan
If your refrigerator or freezer just isn't cooling as effectively as it used to, there are a number of things that can...
Where Is the Thermostat Located on a Side by Side Refrigerator?
Side-by-side refrigerators are identifiable by the two long doors next to each other. Unlike on a stacked refrigerator and freezer unit, the...
How to Clean the Evaporator Tray of a Whirlpool Refrigerator
The evaporator is a part of your Whirlpool refrigerator's cooling system. It works with other parts, such as the compressor and condenser,...
How to Remove a Whirlpool Refrigerator Freezer Back Panel
Whirlpool refrigerators rely on an evaporator to vaporize the liquid refrigerant, which causes heat to be absorbed through the refrigerator walls. This...
How to Replace the Evaporator Fan in a Sears Kenmore Elite Refrigerator
Kenmore Elite refrigerators rely on an evaporator to vaporize the refrigerator's coolant, which helps cool the refrigerator. The coolant passes through the...
What Are the Main Working Parts of a Refrigerator?
The refrigerator was invented by Jacob Perkins in 1830 and has undergone many changes since then, such as the adoption of freon...