Application of NTC Thermistors in Chiller Units

Chiller units are equipment used in air conditioning and refrigeration systems, typically consisting of a compressor, condenser, expansion valve, and evaporator. The evaporator transforms the fluid from a liquid to a gas state, absorbing heat from the surrounding environment to lower indoor temperatures, and NTC thermistors are employed to monitor the evaporator’s temperature.

As the evaporator is one of the most crucial components in chiller units, precise temperature control is paramount. If the evaporator temperature becomes too high, it can result in inefficient cooling, thereby reducing the efficiency of the chiller unit. Therefore, by using NTC thermistors to measure the evaporator’s temperature, it is possible to promptly adjust the chiller unit’s operating status to ensure its normal operation.

NTC thermistors are installed either inside or on the surface of the evaporator and connected to the control system. When the chiller unit operates, NTC thermistors measure the evaporator’s temperature and transmit this information to the control system. The control system adjusts the chiller unit’s operating status based on this information to maintain the evaporator’s temperature within the appropriate range.

NTC thermistors applied to chiller units must possess the following characteristics or requirements:

High Accuracy: Because temperature control in chiller units is critical, NTC thermistors require high accuracy, typically needing to achieve 0.1°C or higher.

Rapid Response: The temperature of the evaporator can change rapidly with the chiller unit’s operating status, so NTC thermistors need to have a fast response to promptly sense temperature changes and transmit corresponding signals.

High-Temperature Resistance: Since the evaporator’s temperature is usually quite high, NTC thermistors need to have a certain level of high-temperature resistance to operate stably in high-temperature environments for extended periods.

Good Stability and Reliability: Chiller units typically require stable operation over extended periods, so NTC thermistors need to demonstrate good stability and reliability, ensuring long-term stable performance without degradation due to environmental factors like temperature and humidity.

Compact Size and Easy Installation: As evaporators are typically relatively small, NTC thermistors need to be compact and easy to install on the inside or surface of the evaporator without interfering with its normal operation.

Therefore, the application of NTC thermistors in chiller units is of great importance, as it helps ensure the normal operation of chiller units. By using NTC thermistors to measure the evaporator’s temperature, it is possible to promptly monitor the chiller unit’s operating status and make adjustments, thus ensuring its efficient and stable operation. With its unique manufacturing methods and leading technology, Nanjing Shiheng Electronic Technology Co., Ltd. produces NTC thermistors that excel in high accuracy, reliability, and stability, making them an excellent choice for use in chiller unit components.

This article is provided by JYHHSU Electronics, a manufacturer of electronic components who based its factories in China.