The heat in the summer turns the car into a real sauna, making travel unbearable. Even a short stay in a hot space causes fatigue and reduces the concentration of the driver. That is why the installation or availability of staff air-conditioner It is not just a comfort option, but a safety issue.
The modern market offers solutions for carWhether it’s an old classic or the latest crossover. Many owners mistakenly believe that their model cannot be installed climate system due to the layout of the hood space. However, engineers have long developed versatile and adaptable kits.
In this article, we will discuss in detail how to choose equipment, what types of systems exist and what you need to consider before starting work. Competent approach will allow you to enjoy the coolness even on the hottest day, without fear for the technical condition of the machine.
The main types of automotive cooling systems
Before you start choosing, you need to clearly understand the difference between the solutions available on the market. There are three main types of systems that can be found today: staffed, freon and evaporative devices.
The standard systems installed at the factory are integrated into the overall architecture of the car. They're managed through ECU A separate engine or climate control unit, ensuring precise temperature maintenance. Unusual Freon systems work on a similar principle, but require independent selection of components and complex installation.
Evaporative air conditioners (often called “coolers”) run on water and electricity. They do not require a sealed circuit, but their effectiveness depends on the humidity of the air. In conditions of high humidity, such devices are practically useless, only increasing the level of dampness in the cabin.
The choice between freon and water is a choice between real efficiency and compromise. Freon systems are able to cool the air to +10 ° C and below, while evaporative systems rarely lower the temperature below +18 ° C.. In hot climates, the choice is obvious.
Selection of equipment for different cars
Selection of components for Any car requires considering the amount of space under the hood. Owners of compact urban hatchbacks often have to look for compressors with reduced dimensions or remote condenser.
The key parameter is the compressor performance. For a middle-class sedan, a unit of 7-10 cubic centimeters is usually enough. For SUVs and minibuses, this figure should be higher to cope with a large volume of air.
When choosing a compressor, pay attention to the type of drive: belt or electric. Electric is easier to install on a car without a regular place, but require powerful wiring.
It is also important to consider the type of refrigerant. The old systems worked on R12, which is now banned. Modern sets are used R134a new R1234yf. Mix different types of oils and freons categorically impossible - this will lead to the failure of the system.
- 🚗 Dimensions: Measure the space available at the radiator before buying a condenser.
- ❄️ Power: for a cabin volume of up to 3 m3, a compressor of 7 cm3 will be enough.
- ⚡ Load: Make sure the car generator pulls the extra load from the fans.
Technical requirements for installation
Installation of air conditioning is a complex technical process that requires compliance with tightness. Any microscopic crack in the tubes or poor-quality roller will lead to a leak of freon after a few months of operation.
Particular attention should be paid to the power supply system. The compressor and capacitor fans consume significant current. It is necessary to lay a separate line from the battery through the fuse corresponding to the current strength of the equipment.
☑️ Pre-installing check
An important step is the vacuuming of the system. Before filling with freon from the circuit, it is necessary to remove air and moisture using a vacuum pump. The remaining moisture can freeze in the expansion valve, blocking the operation of the entire system.
⚠️ Attention: Never solder the tubes if the system is still under pressure. High temperature can lead to ignition of oil and depressurization of the contour.
Comparison of characteristics of air conditioning systems
To finally decide on the choice, it is worth comparing the key parameters of different approaches to cooling the cabin. The table below will help to organize the data and avoid mistakes when buying.
| Parameter | Staffing system | Nurse (Freon) | Eporative |
|---|---|---|---|
| Efficiency | Tall. | Tall. | Low/Mediocre |
| Difficulty of installation | Factory | Tall. | Low. |
| Dependence on ICE | Got it (compressor) | Eat/No (electrically) | No (only current) |
| Impact on expenditure | Increase. | Increase. | Minimum |
As can be seen from the table, non-standard freon systems are almost not inferior to factory analogues in terms of cooling efficiency. The main difference lies in the aesthetics of installation and the presence of automatic control.
Evaporative models win only in the ease of installation and the absence of load on the engine. However, their ability to cool air is limited by the physics of the evaporation process.
Maintenance and troubleshooting
Even the most reliable air-conditioner It requires regular maintenance. The main enemy of the system is loss of tightness and contamination of radiators. Float, dirt and insects clog the cells of the condenser located in front of the main radiator of the engine.
If you notice that the system has stopped cooling or an unpleasant smell has gone from the ducts, you need to conduct a diagnosis. Often the problem lies in the banal contamination of the evaporator or leakage of oil from the compressor.
How do you check for Freon leaks?
To search for leakage, use an ultraviolet lamp if a phosphor has previously been added to the system, or a special electronic leak detector. Soap solution helps to find large fistulas on the connections.
Regular replacement of the cabin filter also affects the efficiency of the work. A clogged filter creates airflow resistance, which is why the evaporator can freeze, blocking the air supply to the cabin.
- 🧼 Cleanup: Once a year, wash the condenser with low pressure water.
- 🔋 Check: Control the tension of the compressor belt.
- 👃 Disinfection: Treat the evaporator with an antibacterial spray when odor appears.
⚠️ Do not start air conditioning in winter more than once a month for 5-10 minutes. This is necessary for lubricating the compressor's coils, but prolonged work in the cold can damage the system.
The influence of air conditioning on the dynamics of the car
Many drivers fear that switching on the climate system will turn their car into a "vegetable." Indeed, the compressor takes some of the power away from the engine, but modern systems have learned to minimize this effect.
In cars with electronic throttle engine control unit (ECU) when the gas pedal is sharply pressed (kick-down), the compressor may be temporarily switched off. This allows you to give all available power to accelerate.
On small engines with a capacity of up to 1.2 liters, the loss of power when the air conditioner is turned on can be felt more noticeable, especially when overtaking or climbing uphill.
On cars with manual transmission, the driver can independently manage the situation by turning off the air conditioning before overtaking. In cars with transmission This process is often automated, but it doesn’t always work perfectly.
Frequently Asked Questions (FAQ)
How much freon does it take to refuel the system?
The exact amount of refrigerant is indicated on a special plate under the hood (usually on the back of the hood or on the radiator frame). For cars, this is usually 450-650 grams. Refueling the system is as harmful as short-term.
Why does the air conditioner blow but not chill?
The most likely reason is the absence of freon due to leakage or a malfunction of the compressor (the clutch is not included). It is also possible clogging of the filter-dryer or malfunction of the condenser fan.
Can I install air conditioning on a car that wasn’t in the factory?
Yes, there are universal sets for car. However, this will require the installation of an additional bracket for the compressor, laying the mains and possibly replacing the generator with a more powerful one.
How often should the filter dryer be changed?
The dehumidifier filter is recommended to be changed every 2-3 years or at each opening of the circuit of the system. It absorbs moisture, and over time its resource is depleted, which can lead to corrosion of internal elements.