In everyday life, we are accustomed to using a general word to designate a household appliance that maintains a low temperature, but a technically correct name depends on its design and operating principle. When you ask what the correct name of a refrigerator is, you often mean refrigerator cabinetwhich is only part of a complex system or an independent unit. Understanding the difference between the terms “refrigerator”, “freezer” and “combined appliance” is necessary not only for competent speech, but also for the correct selection of spare parts during repairs.
Historically, the name comes from the Latin frigus (cold), but in the technical documentation and catalogs of manufacturers a narrower nomenclature is used. It is a mistake to believe that any box with cold is the same thing. The exact name of the model and type of device is always indicated on the nameplate located inside the chamber or on the back wall. It is this data that service engineers require to diagnose faults.
In this article we will analyze in detail what types exist cooling equipment, as they are called according to GOST and international standards, and also consider the internal structure that affects the name. You will learn to distinguish absorption models from compressor models and understand why it is important to know the difference between static cooling and the system No Frost.
Main types of household refrigerators
Modern industry offers many solutions for storing food, and each of them has its own correct name. Most often in apartments there are single-chamber and double-chamber models. The first are a single volume, where the freezer compartment is either a small freezer shelf or is completely absent. The latter are divided into two independent circuits or isolated spaces.
Deserves special attention devices that are popularly called “refrigerators”, but technically they are chest freezers or cabinets. Chests, as a rule, have horizontal loading and are used for deep freezing of large volumes of meat or semi-finished products. Vertical models with many drawers are correctly called freezer cabinets.
- ❄️ Refrigerator cabinet - a classic vertical appliance with one or two doors.
- 🧊 Freezer —a device intended exclusively for freezing and storing food at temperatures below -18°C.
- 🍺 Display refrigerator —trade equipment with transparent doors for displaying goods.
- 🚐 Absorption refrigerator —silent model, often used in cars and hotels, running on gas or from the network.
There are also built-in models that are mounted in a furniture set. They require a special ventilation system, since the heat exchanger (condenser) is hidden inside the cabinet. Incorrect installation of such devices often leads to overheating of the compressor and equipment failure.
Technical classification by type of cooling
The question of what is the correct name for a refrigerator often implies an interest in the defrosting system. Two main types dominate the modern market: drip system (Direct Cool) and No Frost. In drip models, moisture naturally settles on the back wall, freezes, and then thaws, flowing into a special gutter. This process occurs automatically during compressor operating cycles.
The system No Frost (translated as “no frost”) operates on the principle of forced air circulation. The fan drives the air masses through the evaporator, where they are cooled and dried, and then distributed throughout the chamber. In such devices, ice does not form at all, which saves the user from the need for manual defrosting.
⚠️ Attention: In models with the system No Frost products can dry out faster if they are not packaged in an airtight container or film. It is recommended to use containers with lids for storing vegetables and fruits.
There is also a combined cooling system, which manufacturers often label as Full No Frost or Total No Frost. In such devices, both chambers (refrigerator and freezer) operate using frost-free technology. This ensures uniform temperature in all corners of the chamber and no changes in humidity.
Device and key components of the unit
To understand what part we are talking about speech when discussing repairs, you need to know the structure of the device. The heart of any refrigerator is compressor (or motor-compressor). It is he who compresses the refrigerant and forces it to circulate through the system. Modern models often use inverter compressors that operate continuously, varying power, which reduces noise levels and energy consumption. Another critical element is the evaporator. This is a radiator located inside the case (often hidden behind a plastic panel in models
Another critical element is evaporator. This is a radiator located inside the case (often hidden behind a plastic panel in models No Frost), where the refrigerant boils and heat is absorbed from the chambers. The opposite is the condenser grate on the back wall or built into the side walls, which releases heat to the environment.
The thermostatic valve (or capillary tube in simple models) is responsible for throttling the refrigerant. It creates a pressure difference between the (high pressure) outlet of the compressor and the low pressure inlet to the evaporator. Without this element, the cooling cycle would not be possible.
Next to the evaporator
In the freezer compartment
| Unit | Function | Location | Signs of malfunction |
|---|---|---|---|
| Compressor | Gas compression and circulation | Bottom, rear | Humming, does not start, hot |
| Evaporator | Air cooling | Inside the chamber (hidden) | Ice build-up, no cold |
| Defrost heating element | Heating for defrosting | Ice slush, water inside | |
| Fan | Air circulation | Noise, crackling, uneven cold |
The electronic control module is the “brain” of the device. It reads the temperature sensors and opens or closes the dampers, turns on the compressor or fan. Malfunctions in its operation can simulate the breakdown of other components.
Why is the refrigerator humming?
The humming can be caused by vibration of the compressor, improper installation (the legs are not adjusted), or wear of the fan bearings. If a new refrigerator is humming, let the oil in the compressor settle (2-4 hours after transportation).
Climate class and operating conditions
Not all refrigerators are equally suitable for all conditions. Globally, devices are divided by climate class, which determines the range of ambient temperatures at which the equipment operates effectively. Ignoring this parameter may result in the device stopping freezing in the summer or consuming excess energy in the winter.
There are four main classes. N (Normal) — normal, designed for temperatures from +16°C to +32°C. This is the most common class for apartments in temperate climates. SN (Sub-Normal) - subnormal, works from +10°C to +32°C, often found in Europe. For hot countries, the class is intended T (Tropical) (+18°C...+43°C), and universal models are marked ST (subtropical) or combined N-ST.
⚠️ Attention: Installing a class N refrigerator in an unheated room in winter (where the temperature is below +10°C) will lead to thickening of the oil in the compressor and leakage of refrigerant due to impaired circulation. The warranty does not apply in such cases.
When choosing a location for installation, it is important to consider not only temperature, but also humidity. High humidity in combination with the wrong class can cause corrosion of metal parts of the case and electrical contacts.
Energy efficiency and labeling
In modern conditions, energy consumption class is becoming an important parameter. It is designated by letters from A to G (in the new EU marking) or from A+++ to D (in the old system). The more pluses or the closer the letter is to the beginning of the alphabet, the more economically energy is consumed while maintaining the same cooling capacity.
Energy consumption is affected not only by the class of the compressor, but also by the quality of the door seals, the thickness of the insulating layer and the presence of additional functions such as an ice maker. Inverter motors allow you to achieve the highest efficiency indicators, as they avoid peak loads during startup, which are typical for conventional start-stop motors.
- 💡 Class A+++ (or A/B in the new scale) - minimum consumption, high price of the device.
- ⚡ Class C/D —average performance, optimal ratio of price and electricity costs.
- 📉 Class E/F/G —high consumption, often found in budget or older models.
When choosing equipment, you should pay attention to the year of manufacture and the corresponding labeling, since energy efficiency requirements are constantly are becoming tougher. What was considered economical 10 years ago can today be classified as “gluttonous” models.
☑️ Check before purchase
Frequent misconceptions and terminological errors
In everyday life you can often hear incorrect names. For example, many people confuse a refrigerator and a household refrigerator. A refrigerator is, as a rule, a large transport unit (wagon, container, truck body) or an industrial installation for cooling large volumes of cargo. It is technically incorrect to call a home appliance a refrigerator, although the words are etymologically related.
It is also a mistake to call a heating device a “refrigerator,” although in physics the Carnot cycle is reversible. In everyday life, a “refrigerator with a heating function” usually means thermoelectric auto-refrigerators that can both cool and heat food. It would be more correct to call them thermal containers or car refrigerators.
Another common mistake is to assume that if it gets warmer in the refrigerator, the compressor has broken down. Often the problem lies in a freon leak through microcracks in the circuit or a malfunction of the defrost sensor, which causes the evaporator to become overgrown with ice and stop giving off cold.
Is it possible to place a refrigerator next to it? with a battery?
Strongly not recommended. Proximity to a heat source disrupts the heat exchange of the condenser, causing the compressor to work harder. The minimum distance to heating devices is 50 cm, or installation of a heat-insulating screen is necessary.
Why is a refrigerator called an “unit”?
The word “unit” in technology means the connection of several mechanisms into a single whole to perform a common job. Since a refrigerator consists of a compressor, condenser, evaporator and automation, it is technically correct to call it a refrigeration unit.
What is “dry freezing”?
This is a marketing term often used to describe the system No Frost. It is understood that the products are not covered with a layer of frost and do not freeze to the walls, maintaining their structure better than with conventional freezing with high humidity.
How to defrost an old refrigerator correctly?
You must unplug the device, remove all products and leave the doors open until the ice completely melts. It is prohibited to use a knife to chip ice - this can damage the evaporator tubes and lose refrigerant. To speed up, you can put a bowl of warm water inside.