Record of Control System Project for Heat Pump Lithium Bromide Chiller
In November 2025, a project in Shanxi urgently needed a heat pump unit. After technical analysis, it was determined that there was no need to modify the main body of the 272 steam dual effect refrigeration unit. Instead, optimizing the control program was sufficient to meet the demand. The company quickly initiated independent research and development tasks, using Siemens PLC, modules, and frequency converters as core control components, innovatively integrating 4G modules to achieve remote reading and control of on-site data.
The project team efficiently completed the new layout and programming of the electrical cabinet, and achieved integration with the unit in just half a month. Due to time constraints, the team went to the user site to debug and optimize while overcoming key issues such as liquid level control within a week. By designing frequency curves corresponding to high temperature and multi-point control, stable operation was achieved even in the absence of high liquid level signals. At the same time, three external flow meters were connected according to customer requirements, meeting their customized service needs.
This research and development has achieved two major breakthroughs: creating the company's first independently written unit control program and applying 4G wireless remote control technology for the first time. Subsequently, the stability of the program was verified through remote monitoring, which not only laid the foundation for improving the control logic of the heat pump unit, facilitated communication with customers, but also provided solid data support for operating condition analysis. The success of the project demonstrates the team's ability to tackle technical challenges and innovative spirit, providing reference for the company to expand related businesses.
Lithium bromide solution manufacturer
About us
Flier Refrigeration Engineering Technology Co., Ltd is a professional technical service enterprise integrating central air-conditioning host sales, spare parts sales, unit repair and maintenance.
Factory located in Zhenjiang, Jiangsu, covering an area of 25,000 square meters ,and has been built with 1 R&D center, 1 pilot plant, 3 An innovative production, learning, and research base composed of a professional production workshop and its corresponding infrastructure. At present, the company has become a well-known technical service provider in the field of central air conditioning in China.
The company's main business scope includes: central air-conditioning maintenance, cleaning and technical services; cooling tower and fan coil cleaning and maintenance services; custom processing of lithium bromide solution; sales of lithium bromide solution special impurity separators; central air-conditioning host and various zero Sales of accessories; installation and sales of central air conditioning systems, etc.
Contact us
Ms. Lillian GUO
Zhenjiang FLIER Refrigeration Engineering Technology Co., Ltd
Jiangsu, China
Tel: + 86 15358588768(Whatsapp)
Wechat：15358588768
E-mail: mdguolijuan@zjflier.com
