Application of NTC Temperature Sensor in Constant Temperature of Intelligent Toilet Seat

Every winter, many people begin to hate the cold toilet seat. Especially in the early morning and early morning, the touch can make people wake up for a second. As a result, more and more families choose to install smart toilets, especially styles with heated seats. You just need to sit down, and the seat will warm up, not hot or cold, just right. You may not know that this comfortable and just-right constant temperature feeling is inseparable from a key component-NTC temperature sensors.

1. Smart toilet seat: not simple heat generation, but precise constant temperature

Many people think that seat heating means heating all the time, but it is not the case. If you really let the seat ring continue to heat up, it is easy to become too hot, which is not only uncomfortable, but also a safety hazard. The heated seat of the smart toilet pays attention to-constant temperature, not the hotter the better, but to maintain the most comfortable temperature for most people: between 32 °C and 38 °C. To achieve this constant temperature effect, three things need to cooperate behind it:

Heating element: Generally, it is a resistance wire or an aluminum film heating plate, which is responsible for converting electric energy into heat energy;

Temperature control motherboard: equivalent to the "brain", responsible for judging whether the current temperature should rise or fall;

NTC temperature sensor: the core link, responsible for "sensing" the current temperature and transmitting real-time data to the motherboard.

You can understand the NTC temperature sensor as a "temperature scout" and without it, the motherboard is like a blind man-having no idea whether to heat or stop at all.
 

2. NTC temperature sensor: the "perception master" behind the constant temperature

What is NTC

NTC, the full name is Negative Temperature Coefficient, and the Chinese name is Negative Temperature Coefficient Thermistor. Its characteristic is that the temperature rises and the resistance value becomes smaller; When the temperature decreases, the resistance value increases. This feature is very suitable for "temperature monitoring" because it is very sensitive to temperature changes and responds quickly. In smart toilets, the NTC sensor is generally attached to the heating film or close to the heating element to measure the surface temperature in real time.

What has it done

Real-time monitoring of temperature changes: As long as there is a slight change in the seat temperature (even if it is 0.5 °C), the NTC temperature sensor can immediately sense it and send the data to the control motherboard.

Precise constant temperature adjustment: After the control motherboard receives the temperature data, it will judge whether the current temperature is high or low, so as to adjust the current intensity and make the heating element "more heat" or "less heat". This is like the constant temperature function of the air conditioner is turned on, it will not be hot and cold, but will always maintain a comfort range you have set.

Overheat protection to protect safety: In case the heating unit is out of control and the temperature exceeds the standard, such as exceeding 40 °C, NTC will also "alarm" as soon as possible, allowing the motherboard to trigger the protection mechanism, such as turning off the heating or reducing the power, to prevent the risk of scalding.

3. Why is the NTC sensor so important despite its seemingly inconspicuous nature

Smart toilets are products with high frequency of use and special installation locations (humid, high temperature), so the requirements for NTC sensors are also particularly high:

To be sensitive: to quickly sense temperature changes and give timely feedback;

Precise: the temperature difference should be controlled within ± 0.5 °C, so that sitting will not be hot and cold;

To be durable: in the bathroom environment with high humidity and high temperature, it is not easy to damage after long-term use;

To be stable: can not work for a few months on drift data, otherwise the motherboard judgment will be wrong.

Manufacturers like Minsing continue to optimize the research and development and packaging process of NTC sensors, such as using more stable chips and strengthening waterproof and corrosion-resistant packaging to ensure that the sensors remain stable in the harsh environment inside the toilet.

The next time you sit on the smart toilet in winter and feel the warmth of the circle just right, you might as well think about it: In fact, it is an NTC temperature sensor a few millimeters in size, working silently.

Minsing, focusing on the field of NTC temperature sensors, has provided customized sensing solutions for many smart bathroom brands-from sensitivity, accuracy, to packaging and life, it has laid an invisible but solid foundation for user experience. If you are a bathroom brand or a smart home appliance manufacturer, and want to know about NTC solutions that adapt to your products, please feel free to contact us. We provide one-stop service from model selection to testing and customized development, so that your product temperature can "understand users" more.