Schematic diagram of vacuum precooler, explanation of working principle diagram

　　Firstly, we know that a vacuum precooler is a device that utilizes the evaporation and heat absorption principle of refrigerant under vacuum conditions to achieve rapid cooling of food. What is the working principle of this device, and how is its schematic composed? This article will provide a detailed explanation of the schematic diagram of a vacuum precooler.

　　1. Schematic diagram

　　2. Explanation of working principle diagram

　　The schematic diagram of a vacuum precooler consists of four systems: refrigerant circulation system, vacuum system, control system, and cooling chamber. Below, we will explain the relevant work processes of each system separately. Please continue reading:

　　Refrigerant circulation system: The refrigerant circulation system includes components such as refrigerant pump, condenser, expansion valve, evaporator, etc. The refrigerant pump extracts the refrigerant from the condenser, passes through the expansion valve, and enters the evaporator. In the evaporator, the refrigerant absorbs heat from the food and evaporates, thereby cooling the food. The evaporated refrigerant is sucked back into the condenser for cooling, condensed into liquid, and then drawn back into the expansion valve for the next cycle.

　　Vacuum system: The vacuum system includes components such as vacuum pumps and vacuum pipelines. The vacuum pump extracts air from the vacuum chamber, reducing the pressure inside the chamber. When the pressure inside the vacuum chamber decreases to a certain extent, the boiling point of the refrigerant also decreases, thereby accelerating the evaporation rate of the refrigerant in the evaporator and improving the cooling effect.

　　Control system: The control system includes components such as temperature sensors and controllers. The temperature sensor monitors the temperature changes of food and refrigerant, and the controller adjusts the flow rate and vacuum degree of refrigerant according to the temperature changes to achieve precise control of food temperature.

　　Cooling room: A cooling room is a place where food is placed. The food is placed on a tray in the cooling chamber and connected to the vacuum chamber through a vacuum tube. During the cooling process, the refrigerant inside the vacuum chamber evaporates and absorbs heat, causing the temperature of the food to rapidly decrease.

　　We have briefly introduced the schematic diagram of the vacuum precooler here. Through the collaborative work of the four systems mentioned above, we have gained a detailed and clear understanding of the working principle of vacuum precooler, which enables it to achieve rapid cooling of food and extend its shelf life.

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