There are many kinds and forms of refrigeration compressors, which can be divided into two types according to principle: volumetric type and speed type, of which volumetric type is the most common.
How does a compressor compress gas?
Simply put, it is to complete the process of gas compression and transportation by changing the volume of gas! Any power equipment needs power to do work, so does the compressor, which needs a motor (motor) to drive it.
Positive displacement compressors are divided into reciprocating piston type and rotary type.
1, the reciprocating piston changes the working volume of gas through the reciprocating motion of the piston in the cylinder; Piston compressor has a long history and mature production technology.
2. Rotary compressors include scraper (vane) rotary compressors and screw compressors. At present, domestic air conditioners mostly use rotary compressors. Screw compressors are mainly used for large-scale refrigeration equipment, and now there are many screw compressors in some large shopping malls and office buildings.
The refrigeration system is mainly divided into several devices:
Compressor-condenser-throttling device-evaporator
Its basic principle is that the compressor compresses the refrigerant into high-pressure saturated gas (ammonia or freon), and this gaseous refrigerant is condensed by the condenser.
After being throttled by the throttling device, it enters the evaporator for cooling and exchanges heat with the cooled medium. For example, if the evaporator is connected to all rooms in the building, the serpentine tube in the evaporator exchanges heat with the air, and then the cold air is blown into the air in the room by blowing air.
The refrigerant in the serpentine tube of the evaporator changes into low-pressure steam after heat exchange and returns to the compressor, and then is compressed by the compressor, thus completing the refrigeration system in a reciprocating manner.
The heating system is basically the same principle, but in the opposite way.
Supplementary explanation:
Compressor, condenser and evaporator are three core components. Please note that any refrigeration system is completed by these three modules, including your equipment. The process and principle are what I said above, and the pumping of groundwater you mentioned is only an auxiliary process. Use water to cool the refrigerant (ammonia or freon), which is the term in the design institute-circulating water. Generally, a cooling tower is needed to cool the water after the wind.
Refrigeration, when the compressor compresses the working medium (usually Freon), the temperature of the working medium will rise, and it will be led back to the room to expand and absorb heat after outdoor heat dissipation, but the temperature after expansion is generally lower than that before compression because some heat is lost outdoors.
Heating is the other way around ~ ~
This kind of heating thing is called a heat pump, similar to a water pump. Of course, the landlord will understand that the water pump pumps water to a high place, and the heat pump pumps heat from a low-temperature object to a high-temperature object, which is costly. The price is the consumption of mechanical work, specifically the work done by the compressor.
This is discussed in engineering thermodynamics, and the landlord should study it when he has time, paying special attention to the explanation of Carnot cycle.
Air conditioning is divided into indoor unit and outdoor unit (so is central air conditioning, and outdoor unit is the big bag on the roof! ), indoor is the space that needs to adjust the temperature, and outdoor is the atmosphere.