With the rapid development of technology, touch screen technology has been widely used in various industrial equipment and instruments, among which capacitive touch screen is favored for its high sensitivity, high definition and good user experience. In the specific field of freeze dryer, the application of capacitive touch screen not only improves the operation convenience of the equipment, but also enhances the intelligent level of the equipment.
First, the basic principle of capacitive touch screen
Capacitive touch screen is a kind of touch screen that uses the human body's current sensing to work. It is mainly composed of an inductive layer, an insulating layer, a conductive layer and a glass substrate. When a finger or other conductive object touches the screen, a coupling capacitance is formed between the inductive layer and the conductive layer. By measuring the change of this capacitance, the position of the touch point can be located. Capacitive touch screen has the advantages of fast reaction speed, accurate positioning and support for multi-touch, so it has been widely used in smart phones, tablet computers and industrial control equipment.
Two, the working principle of the freeze dryer
Freeze dryer is a kind of equipment that uses the low temperature vacuum environment to sublimate the water in the material directly into water vapor, so as to achieve the purpose of drying. Its working principle mainly includes the following steps:
Pre-freezing stage: the dried material is first cooled to below the temperature of the triple point, so that the water in the material condensates into ice.
Sublimation stage: under vacuum conditions, the ice in the material is directly sublimated into water vapor by heating, and discharged from the system with the vacuum pump.
Post-processing stage: after sublimation and drying of the material for subsequent processing, such as packaging.
Three, the specific application of capacitive touch screen in freeze dryer
In the freeze dryer, the application of capacitive touch screen is mainly reflected in the following aspects:
Operation interface: The capacitive touch screen operation interface of the freeze dryer allows users to intuitively understand the running state and various parameters of the equipment. By touching buttons or ICONS on the screen, users can easily complete the operation of starting, stopping, and setting parameters of the device. This operation mode not only simplifies the operation process, but also improves the operation efficiency.
Parameter setting and monitoring: The capacitive touch screen can display and record various parameters in the freeze-drying process in real time, such as temperature, vacuum degree, heating power, etc. The user can adjust these parameters as needed to achieve the best drying effect. At the same time, the touch screen can also display the historical data in the form of charts, which is convenient for users to analyze and compare the data.
Fault alarm and diagnosis: when the freeze dryer fails, the capacitive touch screen will immediately display the fault information and issue an alarm sound. Users can quickly locate the cause of the failure according to the prompts on the screen, and take corresponding measures to solve the problem. This fault alarm and diagnosis function greatly improves the reliability and maintenance efficiency of the equipment.
Remote control and monitoring: some high-end freeze dryers are also equipped with remote control and monitoring functions. Through the combination of capacitive touch screens and the Internet, users can remotely monitor the operating status of devices and control them remotely from their mobile phones or computers at any time and any place. This capability is particularly important for laboratories or production lines that need to be managed remotely.
Fourth, the advantages of capacitive touch screen in freeze dryer
Improve user experience: the capacitive touch screen has the advantages of high sensitivity, fast response speed, and easy operation, which can significantly improve the user experience. Users can easily complete the function setting and monitoring of the device without cumbersome key operation.
Improve the level of equipment intelligence: through the combination of capacitive touch screen and PLC controller, freeze dryer can achieve more intelligent control and management. The equipment can automatically complete the drying process according to the preset program, and adjust the parameters in real time to adapt to different materials and process requirements.
Enhanced data visualization: The capacitive touch screen can display all the data in the freeze-drying process in the form of charts, so that users can intuitively understand the running state of the equipment and the drying effect. This data visualization function helps users better grasp the drying process and optimize the production process.
Improve equipment reliability: the capacitive touch screen has the function of fault alarm and diagnosis, which can find and deal with equipment fault in time, so as to avoid the loss of production caused by the expansion of fault. At the same time, the touch screen can also record the operation history and fault information of the equipment, providing strong support for the maintenance and maintenance of the equipment.
V. Future development trends
With the continuous progress of science and technology and the in-depth development of industrial automation, the application of capacitive touch screen in freeze dryer will be more and more extensive. In the future, we can foresee the following development trends:
Higher precision control: With the continuous development of sensor technology and control algorithms, freeze dryers will be able to achieve higher precision temperature, vacuum and heating power control. This will help to improve the drying effect and reduce energy consumption.
More intelligent management: through the application of technologies such as the Internet of things, big data and artificial intelligence, freeze dryers will be able to achieve more intelligent management and control. The equipment can automatically learn the user's operating habits and process requirements, and optimize the drying process and parameter Settings accordingly.
Wider application fields: with the continuous improvement of people's quality requirements for food, medicine and other products and the enhancement of environmental awareness, freeze-drying technology will be applied in more fields. The capacitive touch screen as an important part of the freeze dryer will also expand its application field.