The Dynamic Characteristic Testing Technology For The Pressure Temperature Controller Switch

The temperature controller is an important component in the refrigeration system which can adjust and control temperature. It is widely used in all kinds of refrigeration household electrical appliances (such as iceboxes and air conditions). The switch of the temperature controller is a key component that will decide the quality of the temperature controller. To make sure the good quality (control temperature reliably and accurately) of the temperature controller, we should insure the switch is working in the good condition firstly. So we should detect the main technical characteristics of the switch, as to estimate it eligible or not. Furthermore we could analyze the factors influencing the quality, and take action to improve the quality, and then mend the switch.The paper test and research the dynamic characteristics of the pressure temperature controller switch which is widely used in all kinds of refrigeration household electrical appliances in our country. The main contents are composed of the dynamic characteristic testing system for the switch of pressure temperature controller and analyzing the obtained data in the experiment, accessing the quality of the switch, putting forward the steps to improve the quality and the capability.The paper studies the testing principle for the dynamic characteristic of the pressure temperature switch, designs and complete the mechanical structure of the testing system independently, develops two sets testing systems'circuits and software based on PC and DSP, makes some experiments using the testing system based on PC. The paper analyzes and calculates the precision and repetition of the testing system through the mathematics model and repetitious measuring results. In the end, the paper analyzes the dynamic characteristic of the pressure temperature switch, and advances some steps to improve the dynamic characteristic.