Why Does It Take More Than Ten Minutes for the Car Air Conditioning to Cool?
1 Answers
Reasons for slow cooling in car air conditioning: 1. Insufficient refrigerant due to low levels: The main cause of insufficient refrigerant is usually a leak in the system. If there is not enough refrigerant in the air conditioning system, the amount of refrigerant sprayed into the evaporator from the expansion valve will also decrease, leading to reduced heat absorption during evaporation in the evaporator and consequently lower cooling capacity. 2. Moisture infiltration in the air conditioning refrigeration system causing insufficient cooling: There is a component in the refrigeration system called the dryer (or receiver), whose primary function is to absorb moisture from the refrigerant to prevent excessive moisture from reducing cooling capacity. However, when the desiccant in the dryer becomes saturated, it can no longer filter out moisture. As the refrigerant passes through the expansion valve's throttle orifice, the drop in pressure and temperature causes the water in the refrigerant to freeze in the small orifice, leading to restricted refrigerant flow, increased resistance, or complete blockage. 3. Reduced condenser heat dissipation capacity leading to lower cooling performance: Due to varying working environments, the condenser located in front of the car engine can become covered with oil, dirt, or debris, reducing its heat dissipation ability. Additionally, issues with the cooling fan, such as a loose drive belt, reduced fan speed, or high-speed fan problems, can also impair the condenser's heat dissipation. 4. Other reasons: Aging compressors and belts, clogged refrigerant lines, long-term neglect in replacing air conditioning system filters, and malfunctioning cooling fans can all contribute to slow cooling in car air conditioning. Moreover, the quality of the car window tint can also affect the cooling efficiency of the in-car air conditioning system.
