Air conditioning refrigeration principle
The compressor compresses the gaseous Freon into a high-temperature and high-pressure liquid Freon, and then sends it to the condenser (outdoor unit) to become a normal-temperature high-pressure liquid freon, so the outdoor unit blows out hot air. The liquid Freon passes through the capillary tube and enters the evaporator (indoor unit). The space suddenly increases and the pressure decreases. The liquid Freon vaporizes and becomes a gaseous low-temperature Freon, which absorbs a large amount of heat and the evaporator becomes cold. The fan of the indoor unit blows the air in the room from the evaporator, so the indoor unit blows out the cold air; when the water vapor in the air encounters the cold evaporator, it will condense into water droplets and flow out along the water pipe. This is Air conditioning will cause water. The gaseous Freon then returns to the compressor to continue compression and continues to circulate. When heating, there is a component called a four-way valve, so that the flow direction of the freon in the condenser and the evaporator is opposite to that in the case of cooling, so when the heating is performed, the outdoor air is blown by the cold air, and the indoor unit is blown by the hot air. In fact, it is the principle of absorbing heat when liquefaction (from gas to liquid) learned in junior high school physics is to discharge heat and vaporize (from liquid to gas).
Lithium bromide air conditioning refrigeration principle The lithium bromide air conditioning refrigeration principle is specially proposed here. Unlike the compression air conditioner, the working medium used for absorption refrigeration is usually a binary solution composed of two substances with different boiling points. Among them, the low boiling point substance is a refrigerant, and the high boiling point substance is an absorbent. Therefore, the binary solution is also referred to as a refrigerant-absorbent working fluid pair. The so-called binary solution refers to a mixture of two substances that do not interact with each other. The various physical properties of such a homogeneous mixture (e.g., pressure, temperature, concentration, etc.) are completely uniform throughout the mixture and cannot be separated into the original constituents by pure mechanical precipitation or centrifugation.
Its refrigeration principle is divided into two parts
1. The binary solution is heated and boiled by the heat source in the generator, and the refrigerant vapor is condensed into a refrigerant liquid in the condenser. The liquid refrigerant enters the evaporator after being throttled by the U-shaped tube, and is sprayed under the low pressure condition by the evaporator, and the liquid refrigerant evaporates to absorb the heat of the refrigerant to generate a cooling effect.
2. The concentrated solution flowing out of the generator is cooled by the heat exchanger, depressurized, and then flows into the absorber, and is mixed with the original solution of the absorber to become a concentrated solution of intermediate concentration. The intermediate concentration solution is pumped and sprayed by the absorber pump, absorbing the refrigerant vapor coming out of the evaporator into a dilute solution. The dilute solution is pumped by the generator to the generator, and the refrigerant vapor is again generated by the heat source to form a concentrated solution again, and the next cycle is entered.
In summary, any refrigeration equipment has four major components (compressor, condenser, evaporator, throttling device), and the refrigerant changes its physical state in the refrigerator to absorb or release heat to achieve cooling or heating.