The robot vacuum cleaner, a Robovac or a Roomba, has gradually been widely used daily because of its intelligent setting, time-saving, and great performance. It has multiple functions as a smart home device, such as scheduled cleaning, self-charging, and voice intelligence. Usually, the robot vacuum clears with components like built-in batteries and motors, which will get overheated when the machines operate. How do we detect or minimize the risks? NTC thermistor will help protect the machine in real-time.
According to GIR (Global Info Research), the global vacuum cleaner revenue in 2023 is approximately US$4,546.6 million and is expected to reach US$8,646.9 million in 2030, with a CAGR of 9.6% from 2024 to 2030. This growth trend reflects the robot vacuum cleaner market’s potential and consumers’ increasing acceptance of smart home devices. As the largest production region, China accounts for more than 80% of the market share, while North America and Europe, also important markets, account for a certain percentage each. In the next few years, the Asia-Pacific region, especially Japan, South Korea, India, and Southeast Asia will become a market force that cannot be ignored.
The main components of the robot vacuum cleaner include the surface cover, the vacuum inlet, the cavity, the dirt bin, the mobile carrier, the main brush/ side brush, etc. Multiple components work together to realize the Robovac’s automatic charging, automatic cleaning, and other functions. The mobile carrier is equipped with a drive motor, a battery, an air duct, a pressure device, a detection unit, etc., which controls the daily operation of the entire Robovac.
The power source of the robot vacuum cleaner comes from the battery and the motor. Generally speaking, long-life lithium batteries and imported motors are preferred. The motor mainly comprises the movement, the cylinder, the front and rear inner and outer end covers, the air inlet and outlet, the gas pipeline, etc. It is mainly responsible for the entire drive system. The battery provides continuous and stable power for the motor, sensor, control unit, and other electronic components. At the same time, the battery capacity determines the working time of the Robovac.
It is important to detect the battery and motor operation, especially their temperature, in daily operation. Next, let’s take a closer look at how the robot vacuum cleaner’s significant NTC thermistor works.
1. Temperature detection: NTC thermistors are installed near the robotics motor, battery, and other heat-prone components. They can sense the temperature changes of these parts in real-time and transmit the signals to the control system.
2. Temperature control and safety protection: When the robot vacuum cleaner is working or charging, the motor and battery will generate heat. The NTC thermistor will adjust and control the device according to temperature changes. Meanwhile, the cooling system will be turned on in time, and the Robovac will operate under a lower temperature range to prevent the device from being damaged or causing irreparable accidents due to overheating and overcharging.
3. Monitor and control the brush cleaning water temperature: High-end Robovacscan also cleans the brush automatically. This function is triggered when the robovac returns to the base station after completing the mopping function. The brush is cleaned under 55℃ water to dissolve oil stains. The NTC thermistor can accurately measure and control the water temperature so that the entire cleaning process is at a constant temperature, improving the cleaning efficiency.
4. Optimize working performance: The NTC thermistor will also adjust the Robovac’s working time through real-time temperature monitoring according to the user’s living habits to prevent work loss and extend the equipment’s service life.
The NTC thermistor developed by Exsense plays an essential role in robotic operation. Its application helps ensure the normal operation of the equipment, improve work efficiency, and extend the service life of the battery and motor.
Product picture:
| NO. | Material | Specifications |
| 1 | Thermistor | R25=49.12kQ,B(0/100)=3970K+1% |
| 2 | Housing | SUS316+CU |
| 3 | Sleeve | Brown, Polyimide |
| 4 | Cable | UL1571#26AWG Black |
Electronic characteristics:
1.Thermal time constant: ≤3 seconds, in water
2.Dissipation factor: about 2mW/Cin still air
3.Hi-pot test：1500VAC2mA 1 second
4.Insulation test：500VDC 1 second
5. Rated power: ≤10mW
6.Operation temperature range: -20℃ ~ 85℃
Contact:
Ms. Tina Tang
Exsense Sensor Technology Co., Ltd
Tel:86-15813344362
email:sak@exsense.net
Web:www.exsense.net;www.exsense.com
Add:Xida Science Park, Duanzhou Dist., Zhaoqing , Guangdong
