More and more sensors are widely used in smart home appliances. Faced with the gradual popularization and development of intelligent home networks, it has become more urgent to introduce various sensors into home appliances. People hope that home appliances can increase the comfort of use, reduce energy and water consumption, facilitate cleaning, reduce noise and vibration, improve the quality of use, and realize complex intelligence.
In the past, sensors were mainly used in temperature control and level control systems. Now their functions have been improved:
①Basically, negative temperature coefficient (NTC, Negative Temperature Coefficient) and positive temperature coefficient (PTC, Positive Temperature Coefficient) thermistors are used in all temperature measurements;
②Use inductive sensors to measure residual humidity;
③Use the rotation speed sensor to measure the rotation speed of the washing machine and dryer;
④Capacitive sensor is used in button switch operation;
⑤The integrated temperature sensor indicates that the engine is overloaded.
In recent years, new and improved miniature sensors have been used in washing machines and dishwashers.
1. The pressure sensor is used as a water level switch or more complex device, such as the monitoring of the amount of foam in washing machines and dryers.
2. Chemical sensors are used for water quality monitoring. Monitoring parameters include turbidity, color, surface tension, detergent solubility, pH, etc., and then determine the number of rinsing cycles (solution sensing system).
3. The photoelectric system is used to monitor the turbidity of the washing machine, so that the number of washing cycles matches the actual needs (aqueous agent sensor system).
4. The electromagnetic sensor is used in the dishwasher to control the movement of the spray arm.
Many other home appliances also use advanced sensors. The role of sensors in smart homes
1. Non-contact detection systems, such as micro-machined thermocouple infrared sensors for temperature control, which can also be used in cookware, hair care appliances and toasters.
2. The flow sensor can be used to detect air quality in electric fans and vacuum cleaners.
3. Acceleration and slope sensors can be used in electric Olympic games.
4. Intelligent multi-gas sensor (artificial nose) can be used in automatic grilling control.
Reed switch is a typical example of remote sensing technology. It is used in thousands of electrical equipment. include:
①Turbine type meter measures liquid flow;
②Water level monitoring, such as used in coffee machines, or used in dishwashers to monitor the water level of softeners and clarifiers;
③The movement control of the spray arm of the dishwasher;
The role of sensors in smart homes
④Washing machine drum position detection;
⑤Safety control of electrical door detection, infrared sensor.
⑥Electric toothbrush;
⑦Reed sensor in carpet vacuum cleaner;
③Massage chair, bathtub lift and hospital bed movement or final position detection.
Author: Written by Ms.Anna Zhang from S4A INDUSTRIAL CO., LIMITED
Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.
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