The invention of the dishwasher has a long history, it liberates the user’s hands from the housework of washing dishes. With the improvement of people’s living standards, more and more families have demand for dishwashers, especially in recent years, dishwashers have quietly emerged in the world market. Dishwasher water pump, as well as dishwasher drain pump, are indispensable as a core function in the dishwasher.
So, what is a dishwasher water pump?
Dishwasher water pump is a centrifugal water pump that uses the centrifugal water pressure generated by the high-speed rotating impeller, to spray the water which in the tank through the spray arm hole to clean the bowl and the dish. It usually install at the bottom of the dishwasher tank. And people divide it into AC dishwasher pump and DC dishwasher water pump according to the motor supply voltage form.
Reversible type pump : Whether this type pump press the water to the nozzle or to the drain is determined by changing the running direction of the motor. People usually vertically install the reversible dishwahser water pump in the dishwasher machine.
Direct drive type pump : Since the pump motor can only be operated in one running direction. Therefore, for this type of dishwasher water pump, it usually use a solenoid valve to control the water whether flows to the nozzle or to the drain pipe. This solenoid valve can open and close the corresponding valve or switches the passage. Generally speaking, people usually horizontally install the non-reversiblepump in the diswasher machine.
A good dishwasher needs to use a good dishwasher pump to achieve a satisfactory dishwashing effect. So, what kind of pump is better for applying in the dishwasher ? and how to choose a most suitable dishwasher water pump for your dishwasher ? You can follow the below suggestions:
The dishwasher is a machine that washes the dishes with water, the voltage safety of the dishwasher should be considered. It may cause a high safe issue to user once the voltage is leaking, if use high AC voltage to drive the dishwasher pump. So, it is recommend to use DC voltage that is lower than the human body safety to driven the DC dishwasher pump motor. Generally speaking, it is usually use not more than DC 24V voltage to drive the DC low-voltage pumps. Thus , it does not harm to personal safety even if voltage leaking happens. So there is no safety hazard with the dishwasher .
It need use food grade materials to produce the parts of the dishwasher pump which direct contact with water.So, a dishwasher pump should be a food grade pump. Its materials must meet certain food safety requirements to ensure that they are not harmful to the user’s health.
Dishwashing requires not only moderate flow, but also a certain water flow impact. Therefore, it requires a high water head pump that spray out water with large impact force. So that, it can rinse clean the tableware. Recommend people use dishwasher water pumps with water head more than 5 meter.
It need to choose a dishwasher pump with a large flow rate not less than 55L/min. The more large water flow is, the more big rocker arm of the dishwasher can be chose. And large amount water can flow out from the dishwasher , So that, dishwasher can wash the dishes more at a time.
Recommend people to choose a dishwasher pump with power lower not more than 40w. Since, the more smaller the pump motor power is, the more smaller power consumption is. And the more energy-saving the dishwasher is.
Recommend to choose a quiet water pump with a noise not higher than 45 dB. The smaller work sound of the pump is, the less noise will be produced when the dishwasher is working, else it may bring the user with a bad experience. Therefore, the noise level of the dishwasher pump is a key indicator for measuring the performance of the dishwasher.
Recommend to select a the pump with constant power. So that, the dishwasher water pump can run at full capacity , regardless of no matter what voltage is input. Thus the performance of the dishwasher is stable.
The dishwasher is a machine that people turn on frequently. Usually operate dishwasher water pump for two times for three meals a day. So, there are four times for the pump starting and stopping. In general, the pump will generate a large current to impact the motor during start-stop. Which will undoubtedly reduce the service life of the pump, resulting in a decline in the quality of the dishwasher. There will be no such problem, if you choose a soft start pump . The soft start pump current is a gradually increasing process, and there is basically no damage to the motor itself. In addition, brushed DC pump generally use a life of only a few thousand hours a year. While brushless dc pump can use more than 15,000 hours, so it is recommended to choose a brushless DC motor dishwasher water pump.
Most dishwasher water pumps are located below the lower spray arm to pump the water for dishwasher. Like other components, the food or detergent may block the impeller of the pump. So, people need disassemble it to clean the pump. The steps to disassemble the pump are as follows:
The spray arm, strainer and pump casing should be removed before removing the pump. After removing the screw, the pump can be removed.
Some tableware sterilizing dishwashers use the lower impeller as a dishwasher drain pump. This type of water pump is usually equipped with a reversible motor. It need to clean the lower impeller of the pump when cannot be drain the water from the dishwasher. If your dishwasher is equipped with this impeller pump system. This may solve the problem. Please ask a professional maintenance person for help, if your can’t solve the issue yourself.