Monitoring and utilization of temperature and humidity sensor in refrigerator temperature and humidity

 When it comes to refrigerators, I believe everyone is familiar with them. A refrigerator is a refrigeration device that maintains a constant low temperature, which keeps food at a constant low temperature to ensure food quality and reduce food loss. Now that refrigerator freezers are critical to today's food freezing and transportation, the overall advantage of a refrigerator freezer will depend on its internal temperature and humidity monitoring system.

The principle of the refrigerator freezer for storing fruits and vegetables: by reducing the temperature, slowing down the respiration and evaporation of fruits and vegetables, prolonging the lifespan, reducing the consumption of nutrients, and achieving the purpose of storage and preservation. However, there are certain requirements for temperature and humidity control when the refrigerator is refrigerated:

Cold storage can extend the shelf life of food. However, due to the different structures and sensitivities of different fruits and vegetables to temperature, it is recommended to control the storage temperature above the point of chilling injury. Changes in humidity can also have an impact on food storage. Evaporation of some fruits and vegetables, such as watermelon peaches, is significantly reduced as storage humidity decreases, so food storage quality can also be improved by controlling humidity in the refrigerator.

In view of the above, many people may have questions, how to monitor the temperature and humidity of the storage environment in the refrigerator freezer? Here, it is learned that a temperature and humidity monitoring system can be used for monitoring, and the temperature and humidity monitoring system mainly uses a temperature and humidity sensor to detect the temperature and humidity in the freezer refrigerator. General household refrigerators require a temperature monitoring range of -30°C~50°C for temperature and humidity sensors, and a factory freezer temperature measurement range of -40°C~100°C with an accuracy of ±0.2°C. The humidity measurement range of the temperature and humidity sensor is generally 0% to 100% RH, and the accuracy is ± 2% RH.

The operator can set the upper and lower limits of temperature and humidity in the temperature and humidity sensor monitoring system. When the temperature and humidity inside the refrigerator are lower or higher than the set value, the indicator light will flash or the beep will sound. When the temperature is lower than the set value, the cooler automatically performs cooling work. When the temperature is higher than the set value, the refrigeration compressor stops working. When the humidity in the freezer rises to the upper limit of the set value, the fan will dehumidify, and when the humidity is lower than the lower limit, the fan will stop dehumidification.

The temperature and humidity sensor monitoring system is not only the key to the environmental monitoring of the freezer, but also the key to the development of various systems in the Internet of Things. The characteristics of the intelligent temperature sensor are that it can output temperature data and related temperature control quantities, and adapt to various microcontrollers; and it realizes the test function through software on the basis of hardware, and its intelligence also depends on the software. development level.