Dishwasher spray method recommendations

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Have you ever experienced the problem that there are still oil stains on the dishes after washing in the dishwasher, or the dirt in the corners of the inner cavity? Just like the car engine needs to adapt to different road conditions, the spraying method of the dishwasher directly affects the cleaning efficiency and energy consumption performance.

1、Number and layout of spray arms

· Three-layer spray arm system: The mainstream high-end models adopt the upper, middle and lower three-layer spray arm layout, and realize no dead angle cleaning through three-dimensional water flow coverage. The lower spray arm is responsible for the bottom of the pot, the middle layer is aimed at the front of the bowl, and the upper layer specializes in the inner wall of the cup mouth. The three-layer spray system is 40% more efficient than the single-layer model, especially suitable for families with more than 5 people.

· Multi-arm rotating spray: Some models use a rotatable satellite spray arm to enhance the cleaning force of the edge area by rotating the water flow at 360 °. This kind of design needs to be matched with high-precision motor control to ensure that the rotation speed matches the water pressure and avoid the breakage of tableware caused by strong water flow.

· Single/two-layer spray arm: Economical models mostly use single-layer or double-layer spray arms to make up for insufficient coverage by optimizing the spray hole angle and water pressure distribution. Suitable for 2-4 people family, but need to pay attention to the spacing of tableware, avoid overlapping block water flow.

2、Water pressure and nozzle design

· Water pressure standard and performance balance: NSF certification requires dishwashers to have a minimum water pressure of 0.7MPa to ensure basic cleaning ability. High water pressure (1.2-1.8MPa) can effectively strip stubborn oil pollution, but energy consumption and noise need to be balanced-excessive water pressure will significantly increase motor load and operating noise, and dynamic balance needs to be realized through intelligent pressure regulation technology.

· Optimization of spray hole design parameters:The diameter of spray holes is usually controlled at 1.5-2.5mm, and the number is about 40-80. The spray angle and overlapping area are optimized through computer fluid dynamics (CFD) simulation to ensure that the water flow covers no dead corners and the energy distribution is uniform, thus avoiding insufficient local impact force or excessive wear of tableware.

· Spray hole types and application scenarios: The wave-type spray hole expands the coverage area through fan-shaped water flow, which is suitable for cleaning large-area pans, baking pans and other tableware; Directional spray holes focus on precise spray, and are designed for deep-mouth cups, glassware, etc. to ensure that the water flow reaches the bottom or narrow areas and improve cleaning efficiency.

3、Motor type

· Brushless DC motor: High efficiency and energy saving, the speed can be accurately controlled (500-3000 r/min minutes), the noise is as low as 40 decibels, the life span is as long as 10 years, but the cost is high.

· AC induction motor: Mature technology, low cost, but the energy efficiency is 15-20% lower than that of DC motor, and the noise and calorific value is higher, suitable for users with limited budget.

· Variable frequency motor: Combined with the advantages of DC motor, through the frequency converter to achieve stepless speed regulation, taking into account high water pressure and low energy consumption.

4、core purchase points

· Family size adaptation:Three-layer spray arm + DC motor combination is recommended for families with more than 5 people, and two-layer spray arm + variable frequency motor model is optional for families with 2-4 people.

· Energy consumption and noise standards: Energy Star certified models are preferred, with energy consumption 30% lower than ordinary models and noise less than 45 decibels.

· Verification of spray hole and water pressure: During the field test, pay attention to observe whether the water flow is uniform fan-shaped, without bifurcation or dripping, and check whether the actual water pressure meets the nominal value through the water pressure meter.

· Safety and maintenance: Check whether the door seal has passed UL 94 fire certification, and regularly use dishwasher detergent to remove the scale of the spray arm to ensure that the spray hole is unobstructed.

The choice of dishwasher spray method needs to consider the cleaning efficiency, energy consumption, noise and family needs. After mastering these scientific principles and purchase points, you can not only accurately choose the suitable model, but also extend the life of the equipment through reasonable use, so as to achieve the goal of scientific cleaning and green life.