Air conditioning refrigeration can be divided into two situations: non cooling and cooling but not cooling. Let's start with the case of non cooling.

The air conditioner is mainly composed of a fan, compressor, condenser, expansion valve, and evaporator. There is also a refrigerant commonly known as refrigerant in the pipeline. Air conditioners themselves cannot actually cool, but instead achieve the goal of cooling by transferring heat. Due to the law of conservation of energy, air conditioners also release heat of the same energy when "cooling".

In principle, air conditioners use refrigerant to continuously convert refrigerant from liquid/gas to each other under the action of a compressor, achieving heat transfer. The refrigerant passing through the compressor of Baotou Beiben Heavy Duty Truck becomes a high-pressure gaseous state, and passes through the condenser in front of the vehicle for heat release. At this time, the refrigerant becomes a high-pressure liquid state.

After flowing through the expansion valve, the refrigerant at the high pressure level becomes a low-pressure liquid. In this state, the refrigerant reaches the evaporation tank. During the process of passing through the capillary tube of the evaporation tank, the refrigerant begins to absorb heat, and the refrigerant that has absorbed the heat becomes a liquid. At this time, it returns to the compressor and circulates again.

Simply look at:

Compressor – High pressure gaseous (100 degrees) – Condenser (cooling fan) – High pressure liquid (45 degrees) – Expansion valve – Low pressure liquid (10 degrees) – Evaporation tank (air conditioning fan) – Low pressure gaseous (5 degrees) – Compressor.

The entire process requires the compressor of Baotou Beiben Heavy Truck to provide circulating energy, and requires external cooling fans and internal fans for heat exchange.

After understanding the principle, it is convenient to apply the medicine to the case. Without refrigeration, it is generally:

1. Air conditioning lines leak, causing refrigerant loss, which prevents heat transfer.

2. Compressor fault, unable to circulate refrigerant.

3. The fan is malfunctioning and cannot be heat exchanged.

These problems are simple, such as adding refrigerant, repairing the compressor, and replacing the fan. But the air conditioner can work but it's not cool, but what's the matter? "Not cool, but able to cool, indicating that the air conditioner can operate normally.". Generally, poor cooling effect is mainly caused by poor heat dissipation. In this case, cleaning the condenser of Baotou Beiben heavy truck accessories and replacing the air conditioning filter can probably solve the problem of not being cold.

One situation is that there is too much or too little refrigerant, and the refrigerant cannot be vaporized/liquefied normally, resulting in an insignificant cooling effect. At this time, add an appropriate amount of refrigerant according to the vehicle requirements. Another situation is that the expansion valve is blocked and damaged, resulting in inability to control the refrigerant flow, resulting in poor cooling performance.

But then again, this summer has been strange, with many car owners complaining that the air conditioning is not cool. So are so many cars due to air conditioning failures? However, after a series of inspections, the air conditioning systems of these vehicles are all normal, with no shortage of refrigerant, normal high and low pressures, and none of the above mentioned fault points.

However, these vehicles all have a common characteristic, that is, the driving areas are all high temperature areas, the ambient temperature is often 40 degrees Celsius, and the ground temperature is often 60 to 70 degrees Celsius.

It is important to know that air conditioners conduct heat exchange through air, and at a high ambient temperature, the refrigeration efficiency of the air conditioner will be greatly reduced. China is located in the temperate zone, and the air-conditioning cooling power of most vehicles is calibrated based on the temperate climate. When the air conditioner operates outside the calibrated operating conditions, it will naturally not be cool. This is like driving a dirt truck to run Green Express. Do you think this car can save fuel and be more efficient? Therefore, after this situation occurs, the cooling capacity will return to its original state after the ambient temperature drops.

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