How Do Upright Freezers Really Work?

Upright freezers come in a variety of sizes, but the average one stands about 5 feet tall and looks quite a bit like your refrigerator. Upright freezers most commonly have one door that is basically the front of the machine, although some models have two full-length doors and some have half doors or even two half doors each on the top and the bottom. One of the most convenient things about upright freezers is the shelving that is inside, which helps one to keep all of the frozen food items organized. As you can imagine, when the door is opened on upright freezers, a large amount of warm air is allowed to enter and replace the cold air inside it. Keeping the door closed as much as possible and only opening it for a short time when necessary will help improve the efficiency of upright freezers.
Upright freezers have the same basic parts as other freezers that allow them to remove heat from the interior and then maintain that cool temperature. The main parts of upright freezers include compressors, condensers, the capillary tube, evaporator, and the thermostat and the fan. All of these parts work together to move the refrigerant through its path as it creates the necessary cold air.
In upright freezers the compressors compress the low-pressure refrigerant gas into a higher pressure gas, which goes through the condenser coils where the heat dissipates and the gas turns to liquid. The liquid passes through the tiny copper capillary tube to the larger tubes of the evaporator coils, and the change allows the refrigerant to expand back into a gas. This pressure change allows the cold gas to absorb heat from the interior of the upright freezers as it passes through the evaporator coils and the fan keeps the cool air circulating to keep it at a constant cool temperature. The thermostat of the upright freezers tells the compressor when to turn on or off to maintain the desired temperature.
Frost-free upright freezers contain a small heater that melts ice from the coils of the condenser and the shelves of the freezer. The melting ice water funnels through a tube in the bottom of the upright freezers where it is evaporated. With upright freezers that require manual defrosting, everything must be taken out of the upright freezers and the units must be turned off so that the ice melts and can be drained into a bucket. It can then be turned back on and restocked with the frozen food.
Because upright freezers work to maintain a set temperature, they run more efficiently when stocked about 2/3 full. Knowing this will help you determine the best size of upright freezers to fill your needs. You will want to look at the different models and features that are offered in the size you will need. Capacity may differ from model to model, so that is important as well as the EER or Energy Efficiency Ratio. By understanding how upright freezers work, you will be better equipped to make a good choice when you are shopping for the one that will work best for your needs.