In a dishwasher, the soap or detergent is released from the dispenser and onto the dishes through a combination of mechanisms during different stages of the washing cycle. Here's a general overview of how the soap makes it out of the dispenser and onto the dishes:
Pre-Wash and Main Wash: The dishwasher's washing cycle typically consists of several stages. During the pre-wash and main wash stages, water is sprayed onto the dishes to remove initial food particles and debris. In these stages, the dishwasher uses an internal pump to circulate water and direct it through spray arms, which are located at the bottom and top of the dishwasher.
Dispenser Release: The dishwasher's detergent dispenser is usually located on the inside of the dishwasher door. It contains a small compartment where you add the dishwasher detergent.
Timed Release or Rinse Aid Interaction: There are two primary methods of releasing the detergent from the dispenser:
a. Timed Release: In many dishwashers, the detergent dispenser has a timed-release mechanism. When the washing cycle reaches the appropriate stage, a latch or spring mechanism opens the dispenser's compartment, allowing the detergent to be released into the dishwasher's tub. The detergent mixes with the circulating water during the pre-wash or main wash stage.
b. Rinse Aid Interaction: Some dishwashers use rinse aid in addition to detergent. Rinse aid helps improve the drying process and prevents water spots on the dishes. In these cases, the detergent and rinse aid dispensers may work together. The detergent is released as described above, and the rinse aid is dispensed during the final rinse stage, which helps it spread evenly over the dishes.
Water Agitation: Once the detergent is released into the dishwasher's tub, the water agitation created by the spray arms mixes and distributes the detergent throughout the dishwasher, ensuring it reaches all the dishes.
Cleaning Process: During the main wash stage, the detergent's active ingredients work to break down and remove grease, food residue, and stains from the dishes.
Final Rinse: After the cleaning process is complete, the dishwasher goes through a final rinse stage. If there's rinse aid, it's dispensed during this stage to help with drying and to ensure a streak-free finish on the dishes.
By combining these mechanisms, dishwashers efficiently dispense and distribute detergent, allowing for thorough cleaning of the dishes and cookware during the washing cycle.