Seven professional questions and answers about high-precision constant temperature and humidity air conditioning
Release time:
2018-11-23
1. What are the three necessary conditions for the safe operation of a high-precision constant temperature and humidity air conditioning refrigeration system?
1. What are the three necessary conditions for the safe operation of a high-precision constant temperature and humidity air conditioning refrigeration system?
(1) The refrigerant pressure in the system must not be abnormally high to prevent equipment rupture.
(2) Misoperation such as wet stroke, liquid explosion, liquid impact, etc. must not occur (or cause) to prevent equipment damage.
(3) Moving parts must not have defects or fasteners must not be loose to prevent damage to the machine.
2. What is the evaporation temperature of a high-precision constant temperature and humidity air conditioning?
(1) The temperature at which the refrigerant in the evaporator boils and vaporizes under a certain pressure is called the evaporation temperature.
3. What is the condensation temperature?
(1) The temperature at which the gas refrigerant in the condenser condenses into a liquid under a certain pressure is called the condensation temperature.
4. What is the recooling (or subcooling) temperature?
(1) The temperature at which the condensed liquid refrigerant is cooled to a temperature below the condensation temperature under the condensation pressure is called the recooling temperature (or subcooling temperature).
5. What is the core temperature of a high-precision constant temperature and humidity air conditioning?
(1) In a two-stage compression system, the saturation temperature of the refrigerant in the central cooler at the central pressure is called the central temperature.
6. (How to detect and control) the suction temperature of the compressor?
(1) The suction temperature of the compressor can be measured from the thermometer in front of the suction valve of the compressor. The suction temperature is generally higher than the evaporation temperature. The difference depends on the length of the return air pipe and the insulation condition of the pipe. It should generally be 5~10 higher than the evaporation temperature. Changing the liquid supply can adjust the superheat.
7. (How to detect) the exhaust temperature of the compressor, (what factors affect the exhaust temperature)?
(1) The exhaust temperature of the compressor can be measured from the thermometer on the exhaust pipe. The exhaust temperature is proportional to the pressure ratio (of suction and exhaust) and the suction temperature. The higher the suction superheat and the greater the pressure ratio, the higher the exhaust temperature; otherwise, the opposite is true. Generally, the exhaust pressure is slightly higher than the condensing pressure.
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