Car air-conditioning systems provide a comfortable indoor environment for passengers during hot summers and are indispensable configurations of modern vehicles. However, the use of air-conditioning systems may be characterized by poor cooling effects, aroma and acoustic noise. This paper will provide detailed information on frequent car air conditioners malfunctions, cause analysis and maintenance methods to help owners to respond properly to air conditioning problems。
I. Non-refrigeration or cooling failure of air conditioners
The air conditioner is activated with only natural wind, or the cold is not cold enough and the cooling effect is significantly reduced。
Common causes and solutions
Fragmentation characterization solution for refrigerants with inadequate high-pressure gauge reading abnormally checked leaks and supplements refrigerant refrigerants with excess high pressure, low-refrigeration efficiency releases refrigerant condensers with low-heated heat and bad condenser surface area ash-cleaning condenser air-conditioning core plugs out of wind, significantly reducing the failure of replacement air-conditioning core compressor compressors to work or to acoustic correction or replacement of compressor belt flail compressors to smooth or replace leather and..
Detailed analysis
Refrigerants
Refrigerants are the core media for air-conditioning refrigeration. In general, air conditioning systems need to be replenished every 2-3 years. In the short term, the frequent need for annotation indicates a leak in the system, which requires first detection and repair。
Condensers dissipation problems
The condensers are located in the front of the engine compartment and their long-term use accumulates dust, worms, etc., and affects heat dispersion efficiency. Regular cleaning of condensers surfaces with air or water guns can effectively enhance cooling。
3. Air-conditioning core plugging
Air-conditioning cores are recommended for replacement every 1 to 20 000 km. Blocked filter cores not only affect wind, but also breed bacteria to produce a taste。
Ii. Air-conditioning problem troubles
Once the air conditioner has been turned on, the car has a stench of mold, acid or other odor。
Reasons for the evaporation agent's acclimatization: the evaporation agent is chronically wet and easily breeds fungus. Air-conditioning core contamination: leaching cores accumulate dust and bacteria produce odor. Windway pollution: accumulation of dirt in air conditioning pipes. Drain blockage: cold condensed water is impregnable and breeds bacteria. Solutions
Care to replace the air conditioner core filter contamination with low-intensity fumigation of the main filter air conditioner with a special disinfectant evaporation agent to clean the medium-temperature deodorant to clean the system for serious deodorant
Daily prevention of acoustic malfunctions in air conditioning systems
Anomalous noises, such as buzzing, whistling or metal frictions, occur when the air conditioner is activated。
Common causes
1. Infrasound compressors
2. Belt sound
3. Visibility of drums
Address recommendation iv. Air conditioning non-functionality
Air-conditioning compressors are not activated and do not have refrigeration effects after pressing the ac switch。
Scrutinizing steps to check fuses: see if fuses associated with air conditioners melt and check refrigerants: compressing opportunities automatically protect non-working screening of electromagnetic ionators when refrigerants are severely inadequate: testing the power supply directly to the compressor for adsorption of sensors: temperature sensors or pressure switch failure leads to compressors not working to inspect circuits: screening lines are poorly exposed or breakout issues; air conditioning system maintenance is recommended for regular maintenance projects
Maintenance project recommended cycle-critical air-conditioning filters for replacement of 1 20,000 km of high refrigerant inspection per year to check high condenser cleaning per year 2 years of midway inspection
Use of caution to avoid long periods of slacking of air conditioning: low speed of lightweight engines, reduced efficiency of compressors and increased fuel consumption. Ventilating before cooling: a window is ventilated during the summer, and air conditioning is provided after the temperature in the vehicle has fallen. Temperature set-up is appropriate: it is recommended to be set at 24-26 degrees, and the temperature is too low to increase the compressor burden. Internal and external cycles are interchangeable: prolonged use of internal cycles leads to lower air quality in vehicles. Regular operation: air conditioners should also be activated for a few minutes per week during the winter to maintain system lubrication. Summary
The normal operation of the car air-conditioning system is related to the comfort and health of driving. When air conditioners have problems of poor cooling, smell, noise, etc., the owner may make a preliminary determination based on the methods described in this paper. Simple issues such as changing air-conditioning cores, cleaning condensers, etc., can be handled on their own, while specialized operations involving refrigerant injections, compressor overhauls, etc., are recommended to be addressed in formal maintenance facilities. The development of good air conditioning usage habits and regular maintenance awareness is key to maintaining the good working state of the air conditioning system。
