Automotive Air Conditioning System

Vehicle air conditioning systems consist of compact assemblies of common air conditioning components, including evaporators, compressors, condensers, expansion devices, and fans, which are installed in vehicles to provide air conditioning to the passenger compartment. The air conditioning system draws power from the engine's crankshaft and is operated by passengers in the cockpit by pressing a button assigned to the system.

Automotive Air Conditioning System Classification

• The driving mode is divided into the independent type and the non-independent type.

An Independent air conditioner, also known as an active car air conditioner, is driven by a dedicated air conditioner engine. The independent automotive air conditioning system has a large cooling capacity, and stable operation process, and is not affected by the working conditions of the main engine. However, the A/C compressor replacement cost is high, the volume is large, and the quality is large, so it is mostly used in large and medium-sized buses with large cooling capacities. Non-independent air conditioner Non-independent air conditioner is also called a passive automobile air conditioner, the automobile engine directly drives the refrigeration compressor.

• The performance of the air conditioner is divided into single function types, integrated heating, and cooling.

The integration of cooling and heating means that the heating and cooling air share a blower, an air duct, and a set of operating mechanisms. Add engine cooling system outlet on the basis of the refrigeration system. This structure can be divided into two modes: cold and warm air working separately and cold and warm air working simultaneously.

• The control mode is divided into manual type, electric control, and pneumatic adjustment.

The temperature control of manual air interior ventilation is realized by the driver operating various valves on the ventilation duct through the air control lever, temperature control lever, intake lever, and fan switch on the instrument panel. Most economy cars use knob-type manual air conditioning.

The main difference between semi-automatic air conditioning and manual air conditioning is the use of control mechanisms such as programmable devices, servo motors, or control modules. The control system can work according to the setting of the driver, and control the temperature of the air conditioner at the set value, but the wind speed is still manually adjusted.

• The temperature method is divided into a single zone and a double zone.

Single-zone air-conditioning system can only regulate the entire vehicle to maintain a suitable temperature. The dual-zone climate control system independently controls the temperature on the driver's side and the passenger's side through two temperature valves. The four-zone air-conditioning system is installed on some high-end cars, which can independently adjust the temperature of the four areas of the front left, front right, rear left, and rear right. Usually, only automatic air conditioning can be used to regulate the temperature of the zone.

The role of car air conditioning

• The air conditioner can control the temperature in the compartment, which can not only heat the air but also cool the air, so as to control the temperature in the compartment to a comfortable level.
• The air conditioner can discharge moisture into the air. Dry air absorbs body sweat for a more comfortable environment.
• The air conditioner can inhale fresh air and has a ventilation function.
• The air conditioner can filter the air and remove dust and pollen in the air.